diff options
Diffstat (limited to 'drivers/spi')
49 files changed, 3379 insertions, 1264 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 89cbbabaff44..f552c89abdd4 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -70,14 +70,14 @@ config SPI_ATH79 config SPI_ATMEL tristate "Atmel SPI Controller" - depends on (ARCH_AT91 || AVR32) + depends on (ARCH_AT91 || AVR32 || COMPILE_TEST) help This selects a driver for the Atmel SPI Controller, present on many AT32 (AVR32) and AT91 (ARM) chips. config SPI_BCM2835 tristate "BCM2835 SPI controller" - depends on ARCH_BCM2835 + depends on ARCH_BCM2835 || COMPILE_TEST help This selects a driver for the Broadcom BCM2835 SPI master. @@ -88,10 +88,17 @@ config SPI_BCM2835 config SPI_BFIN5XX tristate "SPI controller driver for ADI Blackfin5xx" - depends on BLACKFIN + depends on BLACKFIN && !BF60x help This is the SPI controller master driver for Blackfin 5xx processor. +config SPI_BFIN_V3 + tristate "SPI controller v3 for Blackfin" + depends on BF60x + help + This is the SPI controller v3 master driver + found on Blackfin 60x processor. + config SPI_BFIN_SPORT tristate "SPI bus via Blackfin SPORT" depends on BLACKFIN @@ -151,15 +158,22 @@ config SPI_COLDFIRE_QSPI config SPI_DAVINCI tristate "Texas Instruments DaVinci/DA8x/OMAP-L/AM1x SoC SPI controller" - depends on ARCH_DAVINCI + depends on ARCH_DAVINCI || ARCH_KEYSTONE select SPI_BITBANG select TI_EDMA help SPI master controller for DaVinci/DA8x/OMAP-L/AM1x SPI modules. +config SPI_EFM32 + tristate "EFM32 SPI controller" + depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST) + select SPI_BITBANG + help + Driver for the spi controller found on Energy Micro's EFM32 SoCs. + config SPI_EP93XX tristate "Cirrus Logic EP93xx SPI controller" - depends on ARCH_EP93XX + depends on ARCH_EP93XX || COMPILE_TEST help This enables using the Cirrus EP93xx SPI controller in master mode. @@ -191,7 +205,7 @@ config SPI_GPIO config SPI_IMX tristate "Freescale i.MX SPI controllers" - depends on ARCH_MXC + depends on ARCH_MXC || COMPILE_TEST select SPI_BITBANG default m if IMX_HAVE_PLATFORM_SPI_IMX help @@ -248,6 +262,13 @@ config SPI_FSL_SPI This also enables using the Aeroflex Gaisler GRLIB SPI controller in master mode. +config SPI_FSL_DSPI + tristate "Freescale DSPI controller" + select SPI_BITBANG + help + This enables support for the Freescale DSPI controller in master + mode. VF610 platform uses the controller. + config SPI_FSL_ESPI bool "Freescale eSPI controller" depends on FSL_SOC @@ -280,20 +301,28 @@ config SPI_OMAP_UWIRE config SPI_OMAP24XX tristate "McSPI driver for OMAP" - depends on ARCH_OMAP2PLUS + depends on ARCH_OMAP2PLUS || COMPILE_TEST help SPI master controller for OMAP24XX and later Multichannel SPI (McSPI) modules. +config SPI_TI_QSPI + tristate "DRA7xxx QSPI controller support" + depends on ARCH_OMAP2PLUS || COMPILE_TEST + help + QSPI master controller for DRA7xxx used for flash devices. + This device supports single, dual and quad read support, while + it only supports single write mode. + config SPI_OMAP_100K tristate "OMAP SPI 100K" - depends on ARCH_OMAP850 || ARCH_OMAP730 + depends on ARCH_OMAP850 || ARCH_OMAP730 || COMPILE_TEST help OMAP SPI 100K master controller for omap7xx boards. config SPI_ORION tristate "Orion SPI master" - depends on PLAT_ORION + depends on PLAT_ORION || COMPILE_TEST help This enables using the SPI master controller on the Orion chips. @@ -341,7 +370,7 @@ config SPI_PXA2XX_PCI config SPI_RSPI tristate "Renesas RSPI controller" - depends on SUPERH + depends on SUPERH && SH_DMAE_BASE help SPI driver for Renesas RSPI blocks. @@ -385,7 +414,7 @@ config SPI_SH_MSIOF config SPI_SH tristate "SuperH SPI controller" - depends on SUPERH + depends on SUPERH || COMPILE_TEST help SPI driver for SuperH SPI blocks. @@ -398,7 +427,7 @@ config SPI_SH_SCI config SPI_SH_HSPI tristate "SuperH HSPI controller" - depends on ARCH_SHMOBILE + depends on ARCH_SHMOBILE || COMPILE_TEST help SPI driver for SuperH HSPI blocks. @@ -418,7 +447,7 @@ config SPI_MXS config SPI_TEGRA114 tristate "NVIDIA Tegra114 SPI Controller" - depends on ARCH_TEGRA && TEGRA20_APB_DMA + depends on (ARCH_TEGRA && TEGRA20_APB_DMA) || COMPILE_TEST help SPI driver for NVIDIA Tegra114 SPI Controller interface. This controller is different than the older SoCs SPI controller and also register interface @@ -426,7 +455,7 @@ config SPI_TEGRA114 config SPI_TEGRA20_SFLASH tristate "Nvidia Tegra20 Serial flash Controller" - depends on ARCH_TEGRA + depends on ARCH_TEGRA || COMPILE_TEST help SPI driver for Nvidia Tegra20 Serial flash Controller interface. The main usecase of this controller is to use spi flash as boot @@ -434,7 +463,7 @@ config SPI_TEGRA20_SFLASH config SPI_TEGRA20_SLINK tristate "Nvidia Tegra20/Tegra30 SLINK Controller" - depends on ARCH_TEGRA && TEGRA20_APB_DMA + depends on (ARCH_TEGRA && TEGRA20_APB_DMA) || COMPILE_TEST help SPI driver for Nvidia Tegra20/Tegra30 SLINK Controller interface. @@ -457,7 +486,7 @@ config SPI_TOPCLIFF_PCH config SPI_TXX9 tristate "Toshiba TXx9 SPI controller" - depends on GPIOLIB && CPU_TX49XX + depends on GPIOLIB && (CPU_TX49XX || COMPILE_TEST) help SPI driver for Toshiba TXx9 MIPS SoCs diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index 33f9c09561e7..ab8d8644af0e 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_SPI_AU1550) += spi-au1550.o obj-$(CONFIG_SPI_BCM2835) += spi-bcm2835.o obj-$(CONFIG_SPI_BCM63XX) += spi-bcm63xx.o obj-$(CONFIG_SPI_BFIN5XX) += spi-bfin5xx.o +obj-$(CONFIG_SPI_BFIN_V3) += spi-bfin-v3.o obj-$(CONFIG_SPI_BFIN_SPORT) += spi-bfin-sport.o obj-$(CONFIG_SPI_BITBANG) += spi-bitbang.o obj-$(CONFIG_SPI_BUTTERFLY) += spi-butterfly.o @@ -27,9 +28,11 @@ obj-$(CONFIG_SPI_DESIGNWARE) += spi-dw.o obj-$(CONFIG_SPI_DW_MMIO) += spi-dw-mmio.o obj-$(CONFIG_SPI_DW_PCI) += spi-dw-midpci.o spi-dw-midpci-objs := spi-dw-pci.o spi-dw-mid.o +obj-$(CONFIG_SPI_EFM32) += spi-efm32.o obj-$(CONFIG_SPI_EP93XX) += spi-ep93xx.o obj-$(CONFIG_SPI_FALCON) += spi-falcon.o obj-$(CONFIG_SPI_FSL_CPM) += spi-fsl-cpm.o +obj-$(CONFIG_SPI_FSL_DSPI) += spi-fsl-dspi.o obj-$(CONFIG_SPI_FSL_LIB) += spi-fsl-lib.o obj-$(CONFIG_SPI_FSL_ESPI) += spi-fsl-espi.o obj-$(CONFIG_SPI_FSL_SPI) += spi-fsl-spi.o @@ -46,6 +49,7 @@ obj-$(CONFIG_SPI_OCTEON) += spi-octeon.o obj-$(CONFIG_SPI_OMAP_UWIRE) += spi-omap-uwire.o obj-$(CONFIG_SPI_OMAP_100K) += spi-omap-100k.o obj-$(CONFIG_SPI_OMAP24XX) += spi-omap2-mcspi.o +obj-$(CONFIG_SPI_TI_QSPI) += spi-ti-qspi.o obj-$(CONFIG_SPI_ORION) += spi-orion.o obj-$(CONFIG_SPI_PL022) += spi-pl022.o obj-$(CONFIG_SPI_PPC4xx) += spi-ppc4xx.o diff --git a/drivers/spi/spi-altera.c b/drivers/spi/spi-altera.c index 81b9adb6e766..f38855f76536 100644 --- a/drivers/spi/spi-altera.c +++ b/drivers/spi/spi-altera.c @@ -103,16 +103,6 @@ static void altera_spi_chipsel(struct spi_device *spi, int value) } } -static int altera_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t) -{ - return 0; -} - -static int altera_spi_setup(struct spi_device *spi) -{ - return 0; -} - static inline unsigned int hw_txbyte(struct altera_spi *hw, int count) { if (hw->tx) { @@ -134,7 +124,7 @@ static int altera_spi_txrx(struct spi_device *spi, struct spi_transfer *t) hw->tx = t->tx_buf; hw->rx = t->rx_buf; hw->count = 0; - hw->bytes_per_word = t->bits_per_word / 8; + hw->bytes_per_word = DIV_ROUND_UP(t->bits_per_word, 8); hw->len = t->len / hw->bytes_per_word; if (hw->irq >= 0) { @@ -150,12 +140,12 @@ static int altera_spi_txrx(struct spi_device *spi, struct spi_transfer *t) hw->imr &= ~ALTERA_SPI_CONTROL_IRRDY_MSK; writel(hw->imr, hw->base + ALTERA_SPI_CONTROL); } else { - /* send the first byte */ - writel(hw_txbyte(hw, 0), hw->base + ALTERA_SPI_TXDATA); - - while (1) { + while (hw->count < hw->len) { unsigned int rxd; + writel(hw_txbyte(hw, hw->count), + hw->base + ALTERA_SPI_TXDATA); + while (!(readl(hw->base + ALTERA_SPI_STATUS) & ALTERA_SPI_STATUS_RRDY_MSK)) cpu_relax(); @@ -174,14 +164,7 @@ static int altera_spi_txrx(struct spi_device *spi, struct spi_transfer *t) } hw->count++; - - if (hw->count < hw->len) - writel(hw_txbyte(hw, hw->count), - hw->base + ALTERA_SPI_TXDATA); - else - break; } - } return hw->count * hw->bytes_per_word; @@ -217,7 +200,7 @@ static irqreturn_t altera_spi_irq(int irq, void *dev) static int altera_spi_probe(struct platform_device *pdev) { - struct altera_spi_platform_data *platp = pdev->dev.platform_data; + struct altera_spi_platform_data *platp = dev_get_platdata(&pdev->dev); struct altera_spi *hw; struct spi_master *master; struct resource *res; @@ -231,7 +214,6 @@ static int altera_spi_probe(struct platform_device *pdev) master->bus_num = pdev->id; master->num_chipselect = 16; master->mode_bits = SPI_CS_HIGH; - master->setup = altera_spi_setup; hw = spi_master_get_devdata(master); platform_set_drvdata(pdev, hw); @@ -240,21 +222,16 @@ static int altera_spi_probe(struct platform_device *pdev) hw->bitbang.master = spi_master_get(master); if (!hw->bitbang.master) return err; - hw->bitbang.setup_transfer = altera_spi_setupxfer; hw->bitbang.chipselect = altera_spi_chipsel; hw->bitbang.txrx_bufs = altera_spi_txrx; /* find and map our resources */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - goto exit_busy; - if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res), - pdev->name)) - goto exit_busy; - hw->base = devm_ioremap_nocache(&pdev->dev, res->start, - resource_size(res)); - if (!hw->base) - goto exit_busy; + hw->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(hw->base)) { + err = PTR_ERR(hw->base); + goto exit; + } /* program defaults into the registers */ hw->imr = 0; /* disable spi interrupts */ writel(hw->imr, hw->base + ALTERA_SPI_CONTROL); @@ -281,9 +258,6 @@ static int altera_spi_probe(struct platform_device *pdev) dev_info(&pdev->dev, "base %p, irq %d\n", hw->base, hw->irq); return 0; - -exit_busy: - err = -EBUSY; exit: spi_master_put(master); return err; diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c index 0e06407a4670..37bad952ab38 100644 --- a/drivers/spi/spi-ath79.c +++ b/drivers/spi/spi-ath79.c @@ -221,7 +221,7 @@ static int ath79_spi_probe(struct platform_device *pdev) sp = spi_master_get_devdata(master); platform_set_drvdata(pdev, sp); - pdata = pdev->dev.platform_data; + pdata = dev_get_platdata(&pdev->dev); master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32); master->setup = ath79_spi_setup; diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index ea1ec009f44d..fd7cc566095a 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -360,12 +360,12 @@ static void cs_deactivate(struct atmel_spi *as, struct spi_device *spi) gpio_set_value(asd->npcs_pin, !active); } -static void atmel_spi_lock(struct atmel_spi *as) +static void atmel_spi_lock(struct atmel_spi *as) __acquires(&as->lock) { spin_lock_irqsave(&as->lock, as->flags); } -static void atmel_spi_unlock(struct atmel_spi *as) +static void atmel_spi_unlock(struct atmel_spi *as) __releases(&as->lock) { spin_unlock_irqrestore(&as->lock, as->flags); } @@ -629,9 +629,9 @@ static int atmel_spi_next_xfer_dma_submit(struct spi_master *master, goto err_dma; dev_dbg(master->dev.parent, - " start dma 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); + " start dma xfer %p: len %u tx %p/%08llx rx %p/%08llx\n", + xfer, xfer->len, xfer->tx_buf, (unsigned long long)xfer->tx_dma, + xfer->rx_buf, (unsigned long long)xfer->rx_dma); /* Enable relevant interrupts */ spi_writel(as, IER, SPI_BIT(OVRES)); @@ -732,9 +732,10 @@ static void atmel_spi_pdc_next_xfer(struct spi_master *master, spi_writel(as, TCR, len); dev_dbg(&msg->spi->dev, - " start 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); + " start xfer %p: len %u tx %p/%08llx rx %p/%08llx\n", + xfer, xfer->len, xfer->tx_buf, + (unsigned long long)xfer->tx_dma, xfer->rx_buf, + (unsigned long long)xfer->rx_dma); } else { xfer = as->next_transfer; remaining = as->next_remaining_bytes; @@ -771,9 +772,10 @@ static void atmel_spi_pdc_next_xfer(struct spi_master *master, spi_writel(as, TNCR, len); dev_dbg(&msg->spi->dev, - " 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); + " next xfer %p: len %u tx %p/%08llx rx %p/%08llx\n", + xfer, xfer->len, xfer->tx_buf, + (unsigned long long)xfer->tx_dma, xfer->rx_buf, + (unsigned long long)xfer->rx_dma); ieval = SPI_BIT(ENDRX) | SPI_BIT(OVRES); } else { spi_writel(as, RNCR, 0); @@ -1579,7 +1581,9 @@ static int atmel_spi_probe(struct platform_device *pdev) goto out_unmap_regs; /* Initialize the hardware */ - clk_enable(clk); + ret = clk_prepare_enable(clk); + if (ret) + goto out_unmap_regs; spi_writel(as, CR, SPI_BIT(SWRST)); spi_writel(as, CR, SPI_BIT(SWRST)); /* AT91SAM9263 Rev B workaround */ if (as->caps.has_wdrbt) { @@ -1609,7 +1613,7 @@ out_free_dma: spi_writel(as, CR, SPI_BIT(SWRST)); spi_writel(as, CR, SPI_BIT(SWRST)); /* AT91SAM9263 Rev B workaround */ - clk_disable(clk); + clk_disable_unprepare(clk); free_irq(irq, master); out_unmap_regs: iounmap(as->regs); @@ -1661,7 +1665,7 @@ static int atmel_spi_remove(struct platform_device *pdev) dma_free_coherent(&pdev->dev, BUFFER_SIZE, as->buffer, as->buffer_dma); - clk_disable(as->clk); + clk_disable_unprepare(as->clk); clk_put(as->clk); free_irq(as->irq, master); iounmap(as->regs); @@ -1678,7 +1682,7 @@ static int atmel_spi_suspend(struct platform_device *pdev, pm_message_t mesg) struct spi_master *master = platform_get_drvdata(pdev); struct atmel_spi *as = spi_master_get_devdata(master); - clk_disable(as->clk); + clk_disable_unprepare(as->clk); return 0; } @@ -1687,7 +1691,7 @@ static int atmel_spi_resume(struct platform_device *pdev) struct spi_master *master = platform_get_drvdata(pdev); struct atmel_spi *as = spi_master_get_devdata(master); - clk_enable(as->clk); + return clk_prepare_enable(as->clk); return 0; } diff --git a/drivers/spi/spi-au1550.c b/drivers/spi/spi-au1550.c index e1965553ab79..1d00d9b397dd 100644 --- a/drivers/spi/spi-au1550.c +++ b/drivers/spi/spi-au1550.c @@ -776,7 +776,7 @@ static int au1550_spi_probe(struct platform_device *pdev) hw = spi_master_get_devdata(master); hw->master = spi_master_get(master); - hw->pdata = pdev->dev.platform_data; + hw->pdata = dev_get_platdata(&pdev->dev); hw->dev = &pdev->dev; if (hw->pdata == NULL) { diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c index a4185e492321..52c81481c5c7 100644 --- a/drivers/spi/spi-bcm2835.c +++ b/drivers/spi/spi-bcm2835.c @@ -314,7 +314,7 @@ static int bcm2835_spi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, master); master->mode_bits = BCM2835_SPI_MODE_BITS; - master->bits_per_word_mask = BIT(8 - 1); + master->bits_per_word_mask = SPI_BPW_MASK(8); master->bus_num = -1; master->num_chipselect = 3; master->transfer_one_message = bcm2835_spi_transfer_one; @@ -325,12 +325,6 @@ static int bcm2835_spi_probe(struct platform_device *pdev) init_completion(&bs->done); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "could not get memory resource\n"); - err = -ENODEV; - goto out_master_put; - } - bs->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(bs->regs)) { err = PTR_ERR(bs->regs); @@ -383,7 +377,7 @@ out_master_put: static int bcm2835_spi_remove(struct platform_device *pdev) { - struct spi_master *master = platform_get_drvdata(pdev); + struct spi_master *master = spi_master_get(platform_get_drvdata(pdev)); struct bcm2835_spi *bs = spi_master_get_devdata(master); free_irq(bs->irq, master); diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c index 9fd7a39b8029..536b0e363826 100644 --- a/drivers/spi/spi-bcm63xx.c +++ b/drivers/spi/spi-bcm63xx.c @@ -231,24 +231,6 @@ static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first, return 0; } -static int bcm63xx_spi_prepare_transfer(struct spi_master *master) -{ - struct bcm63xx_spi *bs = spi_master_get_devdata(master); - - pm_runtime_get_sync(&bs->pdev->dev); - - return 0; -} - -static int bcm63xx_spi_unprepare_transfer(struct spi_master *master) -{ - struct bcm63xx_spi *bs = spi_master_get_devdata(master); - - pm_runtime_put(&bs->pdev->dev); - - return 0; -} - static int bcm63xx_spi_transfer_one(struct spi_master *master, struct spi_message *m) { @@ -353,20 +335,13 @@ static int bcm63xx_spi_probe(struct platform_device *pdev) { struct resource *r; struct device *dev = &pdev->dev; - struct bcm63xx_spi_pdata *pdata = pdev->dev.platform_data; + struct bcm63xx_spi_pdata *pdata = dev_get_platdata(&pdev->dev); int irq; struct spi_master *master; struct clk *clk; struct bcm63xx_spi *bs; int ret; - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!r) { - dev_err(dev, "no iomem\n"); - ret = -ENXIO; - goto out; - } - irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(dev, "no irq\n"); @@ -393,6 +368,7 @@ static int bcm63xx_spi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, master); bs->pdev = pdev; + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); bs->regs = devm_ioremap_resource(&pdev->dev, r); if (IS_ERR(bs->regs)) { ret = PTR_ERR(bs->regs); @@ -412,11 +388,10 @@ static int bcm63xx_spi_probe(struct platform_device *pdev) master->bus_num = pdata->bus_num; master->num_chipselect = pdata->num_chipselect; - master->prepare_transfer_hardware = bcm63xx_spi_prepare_transfer; - master->unprepare_transfer_hardware = bcm63xx_spi_unprepare_transfer; master->transfer_one_message = bcm63xx_spi_transfer_one; master->mode_bits = MODEBITS; master->bits_per_word_mask = SPI_BPW_MASK(8); + master->auto_runtime_pm = true; bs->msg_type_shift = pdata->msg_type_shift; bs->msg_ctl_width = pdata->msg_ctl_width; bs->tx_io = (u8 *)(bs->regs + bcm63xx_spireg(SPI_MSG_DATA)); @@ -480,8 +455,7 @@ static int bcm63xx_spi_remove(struct platform_device *pdev) #ifdef CONFIG_PM static int bcm63xx_spi_suspend(struct device *dev) { - struct spi_master *master = - platform_get_drvdata(to_platform_device(dev)); + struct spi_master *master = dev_get_drvdata(dev); struct bcm63xx_spi *bs = spi_master_get_devdata(master); spi_master_suspend(master); @@ -493,8 +467,7 @@ static int bcm63xx_spi_suspend(struct device *dev) static int bcm63xx_spi_resume(struct device *dev) { - struct spi_master *master = - platform_get_drvdata(to_platform_device(dev)); + struct spi_master *master = dev_get_drvdata(dev); struct bcm63xx_spi *bs = spi_master_get_devdata(master); clk_prepare_enable(bs->clk); diff --git a/drivers/spi/spi-bfin-sport.c b/drivers/spi/spi-bfin-sport.c index 07ec597f9732..91921b5f5817 100644 --- a/drivers/spi/spi-bfin-sport.c +++ b/drivers/spi/spi-bfin-sport.c @@ -756,7 +756,7 @@ static int bfin_sport_spi_probe(struct platform_device *pdev) struct bfin_sport_spi_master_data *drv_data; int status; - platform_info = dev->platform_data; + platform_info = dev_get_platdata(dev); /* Allocate master with space for drv_data */ master = spi_alloc_master(dev, sizeof(*master) + 16); diff --git a/drivers/spi/spi-bfin-v3.c b/drivers/spi/spi-bfin-v3.c new file mode 100644 index 000000000000..f4bf81347d68 --- /dev/null +++ b/drivers/spi/spi-bfin-v3.c @@ -0,0 +1,965 @@ +/* + * Analog Devices SPI3 controller driver + * + * Copyright (c) 2013 Analog Devices Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/dma-mapping.h> +#include <linux/errno.h> +#include <linux/gpio.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/ioport.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> +#include <linux/types.h> + +#include <asm/bfin_spi3.h> +#include <asm/cacheflush.h> +#include <asm/dma.h> +#include <asm/portmux.h> + +enum bfin_spi_state { + START_STATE, + RUNNING_STATE, + DONE_STATE, + ERROR_STATE +}; + +struct bfin_spi_master; + +struct bfin_spi_transfer_ops { + void (*write) (struct bfin_spi_master *); + void (*read) (struct bfin_spi_master *); + void (*duplex) (struct bfin_spi_master *); +}; + +/* runtime info for spi master */ +struct bfin_spi_master { + /* SPI framework hookup */ + struct spi_master *master; + + /* Regs base of SPI controller */ + struct bfin_spi_regs __iomem *regs; + + /* Pin request list */ + u16 *pin_req; + + /* Message Transfer pump */ + struct tasklet_struct pump_transfers; + + /* Current message transfer state info */ + struct spi_message *cur_msg; + struct spi_transfer *cur_transfer; + struct bfin_spi_device *cur_chip; + unsigned transfer_len; + + /* transfer buffer */ + void *tx; + void *tx_end; + void *rx; + void *rx_end; + + /* dma info */ + unsigned int tx_dma; + unsigned int rx_dma; + dma_addr_t tx_dma_addr; + dma_addr_t rx_dma_addr; + unsigned long dummy_buffer; /* used in unidirectional transfer */ + unsigned long tx_dma_size; + unsigned long rx_dma_size; + int tx_num; + int rx_num; + + /* store register value for suspend/resume */ + u32 control; + u32 ssel; + + unsigned long sclk; + enum bfin_spi_state state; + + const struct bfin_spi_transfer_ops *ops; +}; + +struct bfin_spi_device { + u32 control; + u32 clock; + u32 ssel; + + u8 cs; + u16 cs_chg_udelay; /* Some devices require > 255usec delay */ + u32 cs_gpio; + u32 tx_dummy_val; /* tx value for rx only transfer */ + bool enable_dma; + const struct bfin_spi_transfer_ops *ops; +}; + +static void bfin_spi_enable(struct bfin_spi_master *drv_data) +{ + bfin_write_or(&drv_data->regs->control, SPI_CTL_EN); +} + +static void bfin_spi_disable(struct bfin_spi_master *drv_data) +{ + bfin_write_and(&drv_data->regs->control, ~SPI_CTL_EN); +} + +/* Caculate the SPI_CLOCK register value based on input HZ */ +static u32 hz_to_spi_clock(u32 sclk, u32 speed_hz) +{ + u32 spi_clock = sclk / speed_hz; + + if (spi_clock) + spi_clock--; + return spi_clock; +} + +static int bfin_spi_flush(struct bfin_spi_master *drv_data) +{ + unsigned long limit = loops_per_jiffy << 1; + + /* wait for stop and clear stat */ + while (!(bfin_read(&drv_data->regs->status) & SPI_STAT_SPIF) && --limit) + cpu_relax(); + + bfin_write(&drv_data->regs->status, 0xFFFFFFFF); + + return limit; +} + +/* Chip select operation functions for cs_change flag */ +static void bfin_spi_cs_active(struct bfin_spi_master *drv_data, struct bfin_spi_device *chip) +{ + if (likely(chip->cs < MAX_CTRL_CS)) + bfin_write_and(&drv_data->regs->ssel, ~chip->ssel); + else + gpio_set_value(chip->cs_gpio, 0); +} + +static void bfin_spi_cs_deactive(struct bfin_spi_master *drv_data, + struct bfin_spi_device *chip) +{ + if (likely(chip->cs < MAX_CTRL_CS)) + bfin_write_or(&drv_data->regs->ssel, chip->ssel); + else + gpio_set_value(chip->cs_gpio, 1); + + /* Move delay here for consistency */ + if (chip->cs_chg_udelay) + udelay(chip->cs_chg_udelay); +} + +/* enable or disable the pin muxed by GPIO and SPI CS to work as SPI CS */ +static inline void bfin_spi_cs_enable(struct bfin_spi_master *drv_data, + struct bfin_spi_device *chip) +{ + if (chip->cs < MAX_CTRL_CS) + bfin_write_or(&drv_data->regs->ssel, chip->ssel >> 8); +} + +static inline void bfin_spi_cs_disable(struct bfin_spi_master *drv_data, + struct bfin_spi_device *chip) +{ + if (chip->cs < MAX_CTRL_CS) + bfin_write_and(&drv_data->regs->ssel, ~(chip->ssel >> 8)); +} + +/* stop controller and re-config current chip*/ +static void bfin_spi_restore_state(struct bfin_spi_master *drv_data) +{ + struct bfin_spi_device *chip = drv_data->cur_chip; + + /* Clear status and disable clock */ + bfin_write(&drv_data->regs->status, 0xFFFFFFFF); + bfin_write(&drv_data->regs->rx_control, 0x0); + bfin_write(&drv_data->regs->tx_control, 0x0); + bfin_spi_disable(drv_data); + + SSYNC(); + + /* Load the registers */ + bfin_write(&drv_data->regs->control, chip->control); + bfin_write(&drv_data->regs->clock, chip->clock); + + bfin_spi_enable(drv_data); + drv_data->tx_num = drv_data->rx_num = 0; + /* we always choose tx transfer initiate */ + bfin_write(&drv_data->regs->rx_control, SPI_RXCTL_REN); + bfin_write(&drv_data->regs->tx_control, + SPI_TXCTL_TEN | SPI_TXCTL_TTI); + bfin_spi_cs_active(drv_data, chip); +} + +/* discard invalid rx data and empty rfifo */ +static inline void dummy_read(struct bfin_spi_master *drv_data) +{ + while (!(bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)) + bfin_read(&drv_data->regs->rfifo); +} + +static void bfin_spi_u8_write(struct bfin_spi_master *drv_data) +{ + dummy_read(drv_data); + while (drv_data->tx < drv_data->tx_end) { + bfin_write(&drv_data->regs->tfifo, (*(u8 *)(drv_data->tx++))); + while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE) + cpu_relax(); + bfin_read(&drv_data->regs->rfifo); + } +} + +static void bfin_spi_u8_read(struct bfin_spi_master *drv_data) +{ + u32 tx_val = drv_data->cur_chip->tx_dummy_val; + + dummy_read(drv_data); + while (drv_data->rx < drv_data->rx_end) { + bfin_write(&drv_data->regs->tfifo, tx_val); + while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE) + cpu_relax(); + *(u8 *)(drv_data->rx++) = bfin_read(&drv_data->regs->rfifo); + } +} + +static void bfin_spi_u8_duplex(struct bfin_spi_master *drv_data) +{ + dummy_read(drv_data); + while (drv_data->rx < drv_data->rx_end) { + bfin_write(&drv_data->regs->tfifo, (*(u8 *)(drv_data->tx++))); + while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE) + cpu_relax(); + *(u8 *)(drv_data->rx++) = bfin_read(&drv_data->regs->rfifo); + } +} + +static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u8 = { + .write = bfin_spi_u8_write, + .read = bfin_spi_u8_read, + .duplex = bfin_spi_u8_duplex, +}; + +static void bfin_spi_u16_write(struct bfin_spi_master *drv_data) +{ + dummy_read(drv_data); + while (drv_data->tx < drv_data->tx_end) { + bfin_write(&drv_data->regs->tfifo, (*(u16 *)drv_data->tx)); + drv_data->tx += 2; + while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE) + cpu_relax(); + bfin_read(&drv_data->regs->rfifo); + } +} + +static void bfin_spi_u16_read(struct bfin_spi_master *drv_data) +{ + u32 tx_val = drv_data->cur_chip->tx_dummy_val; + + dummy_read(drv_data); + while (drv_data->rx < drv_data->rx_end) { + bfin_write(&drv_data->regs->tfifo, tx_val); + while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE) + cpu_relax(); + *(u16 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo); + drv_data->rx += 2; + } +} + +static void bfin_spi_u16_duplex(struct bfin_spi_master *drv_data) +{ + dummy_read(drv_data); + while (drv_data->rx < drv_data->rx_end) { + bfin_write(&drv_data->regs->tfifo, (*(u16 *)drv_data->tx)); + drv_data->tx += 2; + while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE) + cpu_relax(); + *(u16 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo); + drv_data->rx += 2; + } +} + +static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u16 = { + .write = bfin_spi_u16_write, + .read = bfin_spi_u16_read, + .duplex = bfin_spi_u16_duplex, +}; + +static void bfin_spi_u32_write(struct bfin_spi_master *drv_data) +{ + dummy_read(drv_data); + while (drv_data->tx < drv_data->tx_end) { + bfin_write(&drv_data->regs->tfifo, (*(u32 *)drv_data->tx)); + drv_data->tx += 4; + while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE) + cpu_relax(); + bfin_read(&drv_data->regs->rfifo); + } +} + +static void bfin_spi_u32_read(struct bfin_spi_master *drv_data) +{ + u32 tx_val = drv_data->cur_chip->tx_dummy_val; + + dummy_read(drv_data); + while (drv_data->rx < drv_data->rx_end) { + bfin_write(&drv_data->regs->tfifo, tx_val); + while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE) + cpu_relax(); + *(u32 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo); + drv_data->rx += 4; + } +} + +static void bfin_spi_u32_duplex(struct bfin_spi_master *drv_data) +{ + dummy_read(drv_data); + while (drv_data->rx < drv_data->rx_end) { + bfin_write(&drv_data->regs->tfifo, (*(u32 *)drv_data->tx)); + drv_data->tx += 4; + while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE) + cpu_relax(); + *(u32 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo); + drv_data->rx += 4; + } +} + +static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u32 = { + .write = bfin_spi_u32_write, + .read = bfin_spi_u32_read, + .duplex = bfin_spi_u32_duplex, +}; + + +/* test if there is more transfer to be done */ +static void bfin_spi_next_transfer(struct bfin_spi_master *drv) +{ + struct spi_message *msg = drv->cur_msg; + struct spi_transfer *t = drv->cur_transfer; + + /* Move to next transfer */ + if (t->transfer_list.next != &msg->transfers) { + drv->cur_transfer = list_entry(t->transfer_list.next, + struct spi_transfer, transfer_list); + drv->state = RUNNING_STATE; + } else { + drv->state = DONE_STATE; + drv->cur_transfer = NULL; + } +} + +static void bfin_spi_giveback(struct bfin_spi_master *drv_data) +{ + struct bfin_spi_device *chip = drv_data->cur_chip; + + bfin_spi_cs_deactive(drv_data, chip); + spi_finalize_current_message(drv_data->master); +} + +static int bfin_spi_setup_transfer(struct bfin_spi_master *drv) +{ + struct spi_transfer *t = drv->cur_transfer; + u32 cr, cr_width; + + if (t->tx_buf) { + drv->tx = (void *)t->tx_buf; + drv->tx_end = drv->tx + t->len; + } else { + drv->tx = NULL; + } + + if (t->rx_buf) { + drv->rx = t->rx_buf; + drv->rx_end = drv->rx + t->len; + } else { + drv->rx = NULL; + } + + drv->transfer_len = t->len; + + /* bits per word setup */ + switch (t->bits_per_word) { + case 8: + cr_width = SPI_CTL_SIZE08; + drv->ops = &bfin_bfin_spi_transfer_ops_u8; + break; + case 16: + cr_width = SPI_CTL_SIZE16; + drv->ops = &bfin_bfin_spi_transfer_ops_u16; + break; + case 32: + cr_width = SPI_CTL_SIZE32; + drv->ops = &bfin_bfin_spi_transfer_ops_u32; + break; + default: + return -EINVAL; + } + cr = bfin_read(&drv->regs->control) & ~SPI_CTL_SIZE; + cr |= cr_width; + bfin_write(&drv->regs->control, cr); + + /* speed setup */ + bfin_write(&drv->regs->clock, + hz_to_spi_clock(drv->sclk, t->speed_hz)); + return 0; +} + +static int bfin_spi_dma_xfer(struct bfin_spi_master *drv_data) +{ + struct spi_transfer *t = drv_data->cur_transfer; + struct spi_message *msg = drv_data->cur_msg; + struct bfin_spi_device *chip = drv_data->cur_chip; + u32 dma_config; + unsigned long word_count, word_size; + void *tx_buf, *rx_buf; + + switch (t->bits_per_word) { + case 8: + dma_config = WDSIZE_8 | PSIZE_8; + word_count = drv_data->transfer_len; + word_size = 1; + break; + case 16: + dma_config = WDSIZE_16 | PSIZE_16; + word_count = drv_data->transfer_len / 2; + word_size = 2; + break; + default: + dma_config = WDSIZE_32 | PSIZE_32; + word_count = drv_data->transfer_len / 4; + word_size = 4; + break; + } + + if (!drv_data->rx) { + tx_buf = drv_data->tx; + rx_buf = &drv_data->dummy_buffer; + drv_data->tx_dma_size = drv_data->transfer_len; + drv_data->rx_dma_size = sizeof(drv_data->dummy_buffer); + set_dma_x_modify(drv_data->tx_dma, word_size); + set_dma_x_modify(drv_data->rx_dma, 0); + } else if (!drv_data->tx) { + drv_data->dummy_buffer = chip->tx_dummy_val; + tx_buf = &drv_data->dummy_buffer; + rx_buf = drv_data->rx; + drv_data->tx_dma_size = sizeof(drv_data->dummy_buffer); + drv_data->rx_dma_size = drv_data->transfer_len; + set_dma_x_modify(drv_data->tx_dma, 0); + set_dma_x_modify(drv_data->rx_dma, word_size); + } else { + tx_buf = drv_data->tx; + rx_buf = drv_data->rx; + drv_data->tx_dma_size = drv_data->rx_dma_size + = drv_data->transfer_len; + set_dma_x_modify(drv_data->tx_dma, word_size); + set_dma_x_modify(drv_data->rx_dma, word_size); + } + + drv_data->tx_dma_addr = dma_map_single(&msg->spi->dev, + (void *)tx_buf, + drv_data->tx_dma_size, + DMA_TO_DEVICE); + if (dma_mapping_error(&msg->spi->dev, + drv_data->tx_dma_addr)) + return -ENOMEM; + + drv_data->rx_dma_addr = dma_map_single(&msg->spi->dev, + (void *)rx_buf, + drv_data->rx_dma_size, + DMA_FROM_DEVICE); + if (dma_mapping_error(&msg->spi->dev, + drv_data->rx_dma_addr)) { + dma_unmap_single(&msg->spi->dev, + drv_data->tx_dma_addr, + drv_data->tx_dma_size, + DMA_TO_DEVICE); + return -ENOMEM; + } + + dummy_read(drv_data); + set_dma_x_count(drv_data->tx_dma, word_count); + set_dma_x_count(drv_data->rx_dma, word_count); + set_dma_start_addr(drv_data->tx_dma, drv_data->tx_dma_addr); + set_dma_start_addr(drv_data->rx_dma, drv_data->rx_dma_addr); + dma_config |= DMAFLOW_STOP | RESTART | DI_EN; + set_dma_config(drv_data->tx_dma, dma_config); + set_dma_config(drv_data->rx_dma, dma_config | WNR); + enable_dma(drv_data->tx_dma); + enable_dma(drv_data->rx_dma); + SSYNC(); + + bfin_write(&drv_data->regs->rx_control, SPI_RXCTL_REN | SPI_RXCTL_RDR_NE); + SSYNC(); + bfin_write(&drv_data->regs->tx_control, + SPI_TXCTL_TEN | SPI_TXCTL_TTI | SPI_TXCTL_TDR_NF); + + return 0; +} + +static int bfin_spi_pio_xfer(struct bfin_spi_master *drv_data) +{ + struct spi_message *msg = drv_data->cur_msg; + + if (!drv_data->rx) { + /* write only half duplex */ + drv_data->ops->write(drv_data); + if (drv_data->tx != drv_data->tx_end) + return -EIO; + } else if (!drv_data->tx) { + /* read only half duplex */ + drv_data->ops->read(drv_data); + if (drv_data->rx != drv_data->rx_end) + return -EIO; + } else { + /* full duplex mode */ + drv_data->ops->duplex(drv_data); + if (drv_data->tx != drv_data->tx_end) + return -EIO; + } + + if (!bfin_spi_flush(drv_data)) + return -EIO; + msg->actual_length += drv_data->transfer_len; + tasklet_schedule(&drv_data->pump_transfers); + return 0; +} + +static void bfin_spi_pump_transfers(unsigned long data) +{ + struct bfin_spi_master *drv_data = (struct bfin_spi_master *)data; + struct spi_message *msg = NULL; + struct spi_transfer *t = NULL; + struct bfin_spi_device *chip = NULL; + int ret; + + /* Get current state information */ + msg = drv_data->cur_msg; + t = drv_data->cur_transfer; + chip = drv_data->cur_chip; + + /* Handle for abort */ + if (drv_data->state == ERROR_STATE) { + msg->status = -EIO; + bfin_spi_giveback(drv_data); + return; + } + + if (drv_data->state == RUNNING_STATE) { + if (t->delay_usecs) + udelay(t->delay_usecs); + if (t->cs_change) + bfin_spi_cs_deactive(drv_data, chip); + bfin_spi_next_transfer(drv_data); + t = drv_data->cur_transfer; + } + /* Handle end of message */ + if (drv_data->state == DONE_STATE) { + msg->status = 0; + bfin_spi_giveback(drv_data); + return; + } + + if ((t->len == 0) || (t->tx_buf == NULL && t->rx_buf == NULL)) { + /* Schedule next transfer tasklet */ + tasklet_schedule(&drv_data->pump_transfers); + return; + } + + ret = bfin_spi_setup_transfer(drv_data); + if (ret) { + msg->status = ret; + bfin_spi_giveback(drv_data); + } + + bfin_write(&drv_data->regs->status, 0xFFFFFFFF); + bfin_spi_cs_active(drv_data, chip); + drv_data->state = RUNNING_STATE; + + if (chip->enable_dma) + ret = bfin_spi_dma_xfer(drv_data); + else + ret = bfin_spi_pio_xfer(drv_data); + if (ret) { + msg->status = ret; + bfin_spi_giveback(drv_data); + } +} + +static int bfin_spi_transfer_one_message(struct spi_master *master, + struct spi_message *m) +{ + struct bfin_spi_master *drv_data = spi_master_get_devdata(master); + + drv_data->cur_msg = m; + drv_data->cur_chip = spi_get_ctldata(drv_data->cur_msg->spi); + bfin_spi_restore_state(drv_data); + + drv_data->state = START_STATE; + drv_data->cur_transfer = list_entry(drv_data->cur_msg->transfers.next, + struct spi_transfer, transfer_list); + + tasklet_schedule(&drv_data->pump_transfers); + return 0; +} + +#define MAX_SPI_SSEL 7 + +static const u16 ssel[][MAX_SPI_SSEL] = { + {P_SPI0_SSEL1, P_SPI0_SSEL2, P_SPI0_SSEL3, + P_SPI0_SSEL4, P_SPI0_SSEL5, + P_SPI0_SSEL6, P_SPI0_SSEL7}, + + {P_SPI1_SSEL1, P_SPI1_SSEL2, P_SPI1_SSEL3, + P_SPI1_SSEL4, P_SPI1_SSEL5, + P_SPI1_SSEL6, P_SPI1_SSEL7}, + + {P_SPI2_SSEL1, P_SPI2_SSEL2, P_SPI2_SSEL3, + P_SPI2_SSEL4, P_SPI2_SSEL5, + P_SPI2_SSEL6, P_SPI2_SSEL7}, +}; + +static int bfin_spi_setup(struct spi_device *spi) +{ + struct bfin_spi_master *drv_data = spi_master_get_devdata(spi->master); + struct bfin_spi_device *chip = spi_get_ctldata(spi); + u32 bfin_ctl_reg = SPI_CTL_ODM | SPI_CTL_PSSE; + int ret = -EINVAL; + + if (!chip) { + struct bfin_spi3_chip *chip_info = spi->controller_data; + + chip = kzalloc(sizeof(*chip), GFP_KERNEL); + if (!chip) { + dev_err(&spi->dev, "can not allocate chip data\n"); + return -ENOMEM; + } + if (chip_info) { + if (chip_info->control & ~bfin_ctl_reg) { + dev_err(&spi->dev, + "do not set bits that the SPI framework manages\n"); + goto error; + } + chip->control = chip_info->control; + chip->cs_chg_udelay = chip_info->cs_chg_udelay; + chip->tx_dummy_val = chip_info->tx_dummy_val; + chip->enable_dma = chip_info->enable_dma; + } + chip->cs = spi->chip_select; + if (chip->cs < MAX_CTRL_CS) { + chip->ssel = (1 << chip->cs) << 8; + ret = peripheral_request(ssel[spi->master->bus_num] + [chip->cs-1], dev_name(&spi->dev)); + if (ret) { + dev_err(&spi->dev, "peripheral_request() error\n"); + goto error; + } + } else { + chip->cs_gpio = chip->cs - MAX_CTRL_CS; + ret = gpio_request_one(chip->cs_gpio, GPIOF_OUT_INIT_HIGH, + dev_name(&spi->dev)); + if (ret) { + dev_err(&spi->dev, "gpio_request_one() error\n"); + goto error; + } + } + spi_set_ctldata(spi, chip); + } + + /* force a default base state */ + chip->control &= bfin_ctl_reg; + + if (spi->mode & SPI_CPOL) + chip->control |= SPI_CTL_CPOL; + if (spi->mode & SPI_CPHA) + chip->control |= SPI_CTL_CPHA; + if (spi->mode & SPI_LSB_FIRST) + chip->control |= SPI_CTL_LSBF; + chip->control |= SPI_CTL_MSTR; + /* we choose software to controll cs */ + chip->control &= ~SPI_CTL_ASSEL; + + chip->clock = hz_to_spi_clock(drv_data->sclk, spi->max_speed_hz); + + bfin_spi_cs_enable(drv_data, chip); + bfin_spi_cs_deactive(drv_data, chip); + + return 0; +error: + if (chip) { + kfree(chip); + spi_set_ctldata(spi, NULL); + } + + return ret; +} + +static void bfin_spi_cleanup(struct spi_device *spi) +{ + struct bfin_spi_device *chip = spi_get_ctldata(spi); + struct bfin_spi_master *drv_data = spi_master_get_devdata(spi->master); + + if (!chip) + return; + + if (chip->cs < MAX_CTRL_CS) { + peripheral_free(ssel[spi->master->bus_num] + [chip->cs-1]); + bfin_spi_cs_disable(drv_data, chip); + } else { + gpio_free(chip->cs_gpio); + } + + kfree(chip); + spi_set_ctldata(spi, NULL); +} + +static irqreturn_t bfin_spi_tx_dma_isr(int irq, void *dev_id) +{ + struct bfin_spi_master *drv_data = dev_id; + u32 dma_stat = get_dma_curr_irqstat(drv_data->tx_dma); + + clear_dma_irqstat(drv_data->tx_dma); + if (dma_stat & DMA_DONE) { + drv_data->tx_num++; + } else { + dev_err(&drv_data->master->dev, + "spi tx dma error: %d\n", dma_stat); + if (drv_data->tx) + drv_data->state = ERROR_STATE; + } + bfin_write_and(&drv_data->regs->tx_control, ~SPI_TXCTL_TDR_NF); + return IRQ_HANDLED; +} + +static irqreturn_t bfin_spi_rx_dma_isr(int irq, void *dev_id) +{ + struct bfin_spi_master *drv_data = dev_id; + struct spi_message *msg = drv_data->cur_msg; + u32 dma_stat = get_dma_curr_irqstat(drv_data->rx_dma); + + clear_dma_irqstat(drv_data->rx_dma); + if (dma_stat & DMA_DONE) { + drv_data->rx_num++; + /* we may fail on tx dma */ + if (drv_data->state != ERROR_STATE) + msg->actual_length += drv_data->transfer_len; + } else { + drv_data->state = ERROR_STATE; + dev_err(&drv_data->master->dev, + "spi rx dma error: %d\n", dma_stat); + } + bfin_write(&drv_data->regs->tx_control, 0); + bfin_write(&drv_data->regs->rx_control, 0); + if (drv_data->rx_num != drv_data->tx_num) + dev_dbg(&drv_data->master->dev, + "dma interrupt missing: tx=%d,rx=%d\n", + drv_data->tx_num, drv_data->rx_num); + tasklet_schedule(&drv_data->pump_transfers); + return IRQ_HANDLED; +} + +static int bfin_spi_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct bfin_spi3_master *info = dev_get_platdata(dev); + struct spi_master *master; + struct bfin_spi_master *drv_data; + struct resource *mem, *res; + unsigned int tx_dma, rx_dma; + unsigned long sclk; + int ret; + + if (!info) { + dev_err(dev, "platform data missing!\n"); + return -ENODEV; + } + + sclk = get_sclk1(); + if (!sclk) { + dev_err(dev, "can not get sclk1\n"); + return -ENXIO; + } + + res = platform_get_resource(pdev, IORESOURCE_DMA, 0); + if (!res) { + dev_err(dev, "can not get tx dma resource\n"); + return -ENXIO; + } + tx_dma = res->start; + + res = platform_get_resource(pdev, IORESOURCE_DMA, 1); + if (!res) { + dev_err(dev, "can not get rx dma resource\n"); + return -ENXIO; + } + rx_dma = res->start; + + /* allocate master with space for drv_data */ + master = spi_alloc_master(dev, sizeof(*drv_data)); + if (!master) { + dev_err(dev, "can not alloc spi_master\n"); + return -ENOMEM; + } + platform_set_drvdata(pdev, master); + + /* the mode bits supported by this driver */ + master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST; + + master->bus_num = pdev->id; + master->num_chipselect = info->num_chipselect; + master->cleanup = bfin_spi_cleanup; + master->setup = bfin_spi_setup; + master->transfer_one_message = bfin_spi_transfer_one_message; + master->bits_per_word_mask = BIT(32 - 1) | BIT(16 - 1) | BIT(8 - 1); + + drv_data = spi_master_get_devdata(master); + drv_data->master = master; + drv_data->tx_dma = tx_dma; + drv_data->rx_dma = rx_dma; + drv_data->pin_req = info->pin_req; + drv_data->sclk = sclk; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + drv_data->regs = devm_ioremap_resource(dev, mem); + if (IS_ERR(drv_data->regs)) { + ret = PTR_ERR(drv_data->regs); + goto err_put_master; + } + + /* request tx and rx dma */ + ret = request_dma(tx_dma, "SPI_TX_DMA"); + if (ret) { + dev_err(dev, "can not request SPI TX DMA channel\n"); + goto err_put_master; + } + set_dma_callback(tx_dma, bfin_spi_tx_dma_isr, drv_data); + + ret = request_dma(rx_dma, "SPI_RX_DMA"); + if (ret) { + dev_err(dev, "can not request SPI RX DMA channel\n"); + goto err_free_tx_dma; + } + set_dma_callback(drv_data->rx_dma, bfin_spi_rx_dma_isr, drv_data); + + /* request CLK, MOSI and MISO */ + ret = peripheral_request_list(drv_data->pin_req, "bfin-spi3"); + if (ret < 0) { + dev_err(dev, "can not request spi pins\n"); + goto err_free_rx_dma; + } + + bfin_write(&drv_data->regs->control, SPI_CTL_MSTR | SPI_CTL_CPHA); + bfin_write(&drv_data->regs->ssel, 0x0000FE00); + bfin_write(&drv_data->regs->delay, 0x0); + + tasklet_init(&drv_data->pump_transfers, + bfin_spi_pump_transfers, (unsigned long)drv_data); + /* register with the SPI framework */ + ret = spi_register_master(master); + if (ret) { + dev_err(dev, "can not register spi master\n"); + goto err_free_peripheral; + } + + return ret; + +err_free_peripheral: + peripheral_free_list(drv_data->pin_req); +err_free_rx_dma: + free_dma(rx_dma); +err_free_tx_dma: + free_dma(tx_dma); +err_put_master: + spi_master_put(master); + + return ret; +} + +static int bfin_spi_remove(struct platform_device *pdev) +{ + struct spi_master *master = platform_get_drvdata(pdev); + struct bfin_spi_master *drv_data = spi_master_get_devdata(master); + + bfin_spi_disable(drv_data); + + peripheral_free_list(drv_data->pin_req); + free_dma(drv_data->rx_dma); + free_dma(drv_data->tx_dma); + + spi_unregister_master(drv_data->master); + return 0; +} + +#ifdef CONFIG_PM +static int bfin_spi_suspend(struct device *dev) +{ + struct spi_master *master = dev_get_drvdata(dev); + struct bfin_spi_master *drv_data = spi_master_get_devdata(master); + + spi_master_suspend(master); + + drv_data->control = bfin_read(&drv_data->regs->control); + drv_data->ssel = bfin_read(&drv_data->regs->ssel); + + bfin_write(&drv_data->regs->control, SPI_CTL_MSTR | SPI_CTL_CPHA); + bfin_write(&drv_data->regs->ssel, 0x0000FE00); + dma_disable_irq(drv_data->rx_dma); + dma_disable_irq(drv_data->tx_dma); + + return 0; +} + +static int bfin_spi_resume(struct device *dev) +{ + struct spi_master *master = dev_get_drvdata(dev); + struct bfin_spi_master *drv_data = spi_master_get_devdata(master); + int ret = 0; + + /* bootrom may modify spi and dma status when resume in spi boot mode */ + disable_dma(drv_data->rx_dma); + + dma_enable_irq(drv_data->rx_dma); + dma_enable_irq(drv_data->tx_dma); + bfin_write(&drv_data->regs->control, drv_data->control); + bfin_write(&drv_data->regs->ssel, drv_data->ssel); + + ret = spi_master_resume(master); + if (ret) { + free_dma(drv_data->rx_dma); + free_dma(drv_data->tx_dma); + } + + return ret; +} +#endif +static const struct dev_pm_ops bfin_spi_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(bfin_spi_suspend, bfin_spi_resume) +}; + +MODULE_ALIAS("platform:bfin-spi3"); +static struct platform_driver bfin_spi_driver = { + .driver = { + .name = "bfin-spi3", + .owner = THIS_MODULE, + .pm = &bfin_spi_pm_ops, + }, + .remove = bfin_spi_remove, +}; + +module_platform_driver_probe(bfin_spi_driver, bfin_spi_probe); + +MODULE_DESCRIPTION("Analog Devices SPI3 controller driver"); +MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c index 59a73424419c..45bdf73d6868 100644 --- a/drivers/spi/spi-bfin5xx.c +++ b/drivers/spi/spi-bfin5xx.c @@ -1271,7 +1271,7 @@ static int bfin_spi_probe(struct platform_device *pdev) struct resource *res; int status = 0; - platform_info = dev->platform_data; + platform_info = dev_get_platdata(dev); /* Allocate master with space for drv_data */ master = spi_alloc_master(dev, sizeof(*drv_data)); diff --git a/drivers/spi/spi-bitbang.c b/drivers/spi/spi-bitbang.c index a63d7da3bfe2..e3946e44e076 100644 --- a/drivers/spi/spi-bitbang.c +++ b/drivers/spi/spi-bitbang.c @@ -255,150 +255,140 @@ static int spi_bitbang_bufs(struct spi_device *spi, struct spi_transfer *t) * Drivers can provide word-at-a-time i/o primitives, or provide * transfer-at-a-time ones to leverage dma or fifo hardware. */ -static void bitbang_work(struct work_struct *work) + +static int spi_bitbang_prepare_hardware(struct spi_master *spi) { - struct spi_bitbang *bitbang = - container_of(work, struct spi_bitbang, work); + struct spi_bitbang *bitbang; unsigned long flags; - struct spi_message *m, *_m; + + bitbang = spi_master_get_devdata(spi); spin_lock_irqsave(&bitbang->lock, flags); bitbang->busy = 1; - list_for_each_entry_safe(m, _m, &bitbang->queue, queue) { - struct spi_device *spi; - unsigned nsecs; - struct spi_transfer *t = NULL; - unsigned tmp; - unsigned cs_change; - int status; - int do_setup = -1; - - list_del(&m->queue); - spin_unlock_irqrestore(&bitbang->lock, flags); - - /* FIXME this is made-up ... the correct value is known to - * word-at-a-time bitbang code, and presumably chipselect() - * should enforce these requirements too? - */ - nsecs = 100; + spin_unlock_irqrestore(&bitbang->lock, flags); - spi = m->spi; - tmp = 0; - cs_change = 1; - status = 0; + return 0; +} - list_for_each_entry (t, &m->transfers, transfer_list) { - - /* override speed or wordsize? */ - if (t->speed_hz || t->bits_per_word) - do_setup = 1; - - /* init (-1) or override (1) transfer params */ - if (do_setup != 0) { - status = bitbang->setup_transfer(spi, t); - if (status < 0) - break; - if (do_setup == -1) - do_setup = 0; - } - - /* set up default clock polarity, and activate chip; - * this implicitly updates clock and spi modes as - * previously recorded for this device via setup(). - * (and also deselects any other chip that might be - * selected ...) - */ - if (cs_change) { - bitbang->chipselect(spi, BITBANG_CS_ACTIVE); - ndelay(nsecs); - } - cs_change = t->cs_change; - if (!t->tx_buf && !t->rx_buf && t->len) { - status = -EINVAL; - break; - } +static int spi_bitbang_transfer_one(struct spi_master *master, + struct spi_message *m) +{ + struct spi_bitbang *bitbang; + unsigned nsecs; + struct spi_transfer *t = NULL; + unsigned cs_change; + int status; + int do_setup = -1; + struct spi_device *spi = m->spi; + + bitbang = spi_master_get_devdata(master); + + /* FIXME this is made-up ... the correct value is known to + * word-at-a-time bitbang code, and presumably chipselect() + * should enforce these requirements too? + */ + nsecs = 100; - /* transfer data. the lower level code handles any - * new dma mappings it needs. our caller always gave - * us dma-safe buffers. - */ - if (t->len) { - /* REVISIT dma API still needs a designated - * DMA_ADDR_INVALID; ~0 might be better. - */ - if (!m->is_dma_mapped) - t->rx_dma = t->tx_dma = 0; - status = bitbang->txrx_bufs(spi, t); - } - if (status > 0) - m->actual_length += status; - if (status != t->len) { - /* always report some kind of error */ - if (status >= 0) - status = -EREMOTEIO; + cs_change = 1; + status = 0; + + list_for_each_entry (t, &m->transfers, transfer_list) { + + /* override speed or wordsize? */ + if (t->speed_hz || t->bits_per_word) + do_setup = 1; + + /* init (-1) or override (1) transfer params */ + if (do_setup != 0) { + status = bitbang->setup_transfer(spi, t); + if (status < 0) break; - } - status = 0; - - /* protocol tweaks before next transfer */ - if (t->delay_usecs) - udelay(t->delay_usecs); - - if (cs_change && !list_is_last(&t->transfer_list, &m->transfers)) { - /* sometimes a short mid-message deselect of the chip - * may be needed to terminate a mode or command - */ - ndelay(nsecs); - bitbang->chipselect(spi, BITBANG_CS_INACTIVE); - ndelay(nsecs); - } + if (do_setup == -1) + do_setup = 0; } - m->status = status; - m->complete(m->context); + /* set up default clock polarity, and activate chip; + * this implicitly updates clock and spi modes as + * previously recorded for this device via setup(). + * (and also deselects any other chip that might be + * selected ...) + */ + if (cs_change) { + bitbang->chipselect(spi, BITBANG_CS_ACTIVE); + ndelay(nsecs); + } + cs_change = t->cs_change; + if (!t->tx_buf && !t->rx_buf && t->len) { + status = -EINVAL; + break; + } - /* normally deactivate chipselect ... unless no error and - * cs_change has hinted that the next message will probably - * be for this chip too. + /* transfer data. the lower level code handles any + * new dma mappings it needs. our caller always gave + * us dma-safe buffers. */ - if (!(status == 0 && cs_change)) { + if (t->len) { + /* REVISIT dma API still needs a designated + * DMA_ADDR_INVALID; ~0 might be better. + */ + if (!m->is_dma_mapped) + t->rx_dma = t->tx_dma = 0; + status = bitbang->txrx_bufs(spi, t); + } + if (status > 0) + m->actual_length += status; + if (status != t->len) { + /* always report some kind of error */ + if (status >= 0) + status = -EREMOTEIO; + break; + } + status = 0; + + /* protocol tweaks before next transfer */ + if (t->delay_usecs) + udelay(t->delay_usecs); + + if (cs_change && !list_is_last(&t->transfer_list, &m->transfers)) { + /* sometimes a short mid-message deselect of the chip + * may be needed to terminate a mode or command + */ ndelay(nsecs); bitbang->chipselect(spi, BITBANG_CS_INACTIVE); ndelay(nsecs); } + } + + m->status = status; - spin_lock_irqsave(&bitbang->lock, flags); + /* normally deactivate chipselect ... unless no error and + * cs_change has hinted that the next message will probably + * be for this chip too. + */ + if (!(status == 0 && cs_change)) { + ndelay(nsecs); + bitbang->chipselect(spi, BITBANG_CS_INACTIVE); + ndelay(nsecs); } - bitbang->busy = 0; - spin_unlock_irqrestore(&bitbang->lock, flags); + + spi_finalize_current_message(master); + + return status; } -/** - * spi_bitbang_transfer - default submit to transfer queue - */ -int spi_bitbang_transfer(struct spi_device *spi, struct spi_message *m) +static int spi_bitbang_unprepare_hardware(struct spi_master *spi) { - struct spi_bitbang *bitbang; + struct spi_bitbang *bitbang; unsigned long flags; - int status = 0; - m->actual_length = 0; - m->status = -EINPROGRESS; - - bitbang = spi_master_get_devdata(spi->master); + bitbang = spi_master_get_devdata(spi); spin_lock_irqsave(&bitbang->lock, flags); - if (!spi->max_speed_hz) - status = -ENETDOWN; - else { - list_add_tail(&m->queue, &bitbang->queue); - queue_work(bitbang->workqueue, &bitbang->work); - } + bitbang->busy = 0; spin_unlock_irqrestore(&bitbang->lock, flags); - return status; + return 0; } -EXPORT_SYMBOL_GPL(spi_bitbang_transfer); /*----------------------------------------------------------------------*/ @@ -428,20 +418,22 @@ EXPORT_SYMBOL_GPL(spi_bitbang_transfer); int spi_bitbang_start(struct spi_bitbang *bitbang) { struct spi_master *master = bitbang->master; - int status; if (!master || !bitbang->chipselect) return -EINVAL; - INIT_WORK(&bitbang->work, bitbang_work); spin_lock_init(&bitbang->lock); - INIT_LIST_HEAD(&bitbang->queue); if (!master->mode_bits) master->mode_bits = SPI_CPOL | SPI_CPHA | bitbang->flags; - if (!master->transfer) - master->transfer = spi_bitbang_transfer; + if (master->transfer || master->transfer_one_message) + return -EINVAL; + + master->prepare_transfer_hardware = spi_bitbang_prepare_hardware; + master->unprepare_transfer_hardware = spi_bitbang_unprepare_hardware; + master->transfer_one_message = spi_bitbang_transfer_one; + if (!bitbang->txrx_bufs) { bitbang->use_dma = 0; bitbang->txrx_bufs = spi_bitbang_bufs; @@ -452,34 +444,12 @@ int spi_bitbang_start(struct spi_bitbang *bitbang) master->setup = spi_bitbang_setup; master->cleanup = spi_bitbang_cleanup; } - } else if (!master->setup) - return -EINVAL; - if (master->transfer == spi_bitbang_transfer && - !bitbang->setup_transfer) - return -EINVAL; - - /* this task is the only thing to touch the SPI bits */ - bitbang->busy = 0; - bitbang->workqueue = create_singlethread_workqueue( - dev_name(master->dev.parent)); - if (bitbang->workqueue == NULL) { - status = -EBUSY; - goto err1; } /* driver may get busy before register() returns, especially * if someone registered boardinfo for devices */ - status = spi_register_master(master); - if (status < 0) - goto err2; - - return status; - -err2: - destroy_workqueue(bitbang->workqueue); -err1: - return status; + return spi_register_master(master); } EXPORT_SYMBOL_GPL(spi_bitbang_start); @@ -490,10 +460,6 @@ int spi_bitbang_stop(struct spi_bitbang *bitbang) { spi_unregister_master(bitbang->master); - WARN_ON(!list_empty(&bitbang->queue)); - - destroy_workqueue(bitbang->workqueue); - return 0; } EXPORT_SYMBOL_GPL(spi_bitbang_stop); diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c index 17965fe225cc..5655acf55bfe 100644 --- a/drivers/spi/spi-clps711x.c +++ b/drivers/spi/spi-clps711x.c @@ -239,11 +239,8 @@ static int spi_clps711x_probe(struct platform_device *pdev) } dev_err(&pdev->dev, "Failed to register master\n"); - devm_free_irq(&pdev->dev, IRQ_SSEOTI, hw); clk_out: - devm_clk_put(&pdev->dev, hw->spi_clk); - err_out: while (--i >= 0) if (gpio_is_valid(hw->chipselect[i])) @@ -261,13 +258,10 @@ static int spi_clps711x_remove(struct platform_device *pdev) struct spi_master *master = platform_get_drvdata(pdev); struct spi_clps711x_data *hw = spi_master_get_devdata(master); - devm_free_irq(&pdev->dev, IRQ_SSEOTI, hw); - for (i = 0; i < master->num_chipselect; i++) if (gpio_is_valid(hw->chipselect[i])) gpio_free(hw->chipselect[i]); - devm_clk_put(&pdev->dev, hw->spi_clk); spi_unregister_master(master); kfree(master); diff --git a/drivers/spi/spi-coldfire-qspi.c b/drivers/spi/spi-coldfire-qspi.c index 0631b9d4a5de..cc5b75d10c38 100644 --- a/drivers/spi/spi-coldfire-qspi.c +++ b/drivers/spi/spi-coldfire-qspi.c @@ -354,24 +354,6 @@ static int mcfqspi_transfer_one_message(struct spi_master *master, } -static int mcfqspi_prepare_transfer_hw(struct spi_master *master) -{ - struct mcfqspi *mcfqspi = spi_master_get_devdata(master); - - pm_runtime_get_sync(mcfqspi->dev); - - return 0; -} - -static int mcfqspi_unprepare_transfer_hw(struct spi_master *master) -{ - struct mcfqspi *mcfqspi = spi_master_get_devdata(master); - - pm_runtime_put_sync(mcfqspi->dev); - - return 0; -} - static int mcfqspi_setup(struct spi_device *spi) { if (spi->chip_select >= spi->master->num_chipselect) { @@ -400,7 +382,7 @@ static int mcfqspi_probe(struct platform_device *pdev) struct mcfqspi_platform_data *pdata; int status; - pdata = pdev->dev.platform_data; + pdata = dev_get_platdata(&pdev->dev); if (!pdata) { dev_dbg(&pdev->dev, "platform data is missing\n"); return -ENOENT; @@ -473,8 +455,7 @@ static int mcfqspi_probe(struct platform_device *pdev) master->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 16); master->setup = mcfqspi_setup; master->transfer_one_message = mcfqspi_transfer_one_message; - master->prepare_transfer_hardware = mcfqspi_prepare_transfer_hw; - master->unprepare_transfer_hardware = mcfqspi_unprepare_transfer_hw; + master->auto_runtime_pm = true; platform_set_drvdata(pdev, master); @@ -558,7 +539,7 @@ static int mcfqspi_resume(struct device *dev) #ifdef CONFIG_PM_RUNTIME static int mcfqspi_runtime_suspend(struct device *dev) { - struct mcfqspi *mcfqspi = platform_get_drvdata(to_platform_device(dev)); + struct mcfqspi *mcfqspi = dev_get_drvdata(dev); clk_disable(mcfqspi->clk); @@ -567,7 +548,7 @@ static int mcfqspi_runtime_suspend(struct device *dev) static int mcfqspi_runtime_resume(struct device *dev) { - struct mcfqspi *mcfqspi = platform_get_drvdata(to_platform_device(dev)); + struct mcfqspi *mcfqspi = dev_get_drvdata(dev); clk_enable(mcfqspi->clk); diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c index 222d3e37fc28..8fbfe2483ffd 100644 --- a/drivers/spi/spi-davinci.c +++ b/drivers/spi/spi-davinci.c @@ -609,7 +609,7 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t) else buf = (void *)t->tx_buf; t->tx_dma = dma_map_single(&spi->dev, buf, - t->len, DMA_FROM_DEVICE); + t->len, DMA_TO_DEVICE); if (!t->tx_dma) { ret = -EFAULT; goto err_tx_map; @@ -872,8 +872,8 @@ static int davinci_spi_probe(struct platform_device *pdev) goto free_master; } - if (pdev->dev.platform_data) { - pdata = pdev->dev.platform_data; + if (dev_get_platdata(&pdev->dev)) { + pdata = dev_get_platdata(&pdev->dev); dspi->pdata = *pdata; } else { /* update dspi pdata with that from the DT */ diff --git a/drivers/spi/spi-efm32.c b/drivers/spi/spi-efm32.c new file mode 100644 index 000000000000..7d84418a01d8 --- /dev/null +++ b/drivers/spi/spi-efm32.c @@ -0,0 +1,516 @@ +/* + * Copyright (C) 2012-2013 Uwe Kleine-Koenig for Pengutronix + * + * This program is free software; you can redistribute it and/or modify it under + * the terms of the GNU General Public License version 2 as published by the + * Free Software Foundation. + */ +#include <linux/kernel.h> +#include <linux/io.h> +#include <linux/spi/spi.h> +#include <linux/spi/spi_bitbang.h> +#include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/of_gpio.h> +#include <linux/platform_data/efm32-spi.h> + +#define DRIVER_NAME "efm32-spi" + +#define MASK_VAL(mask, val) ((val << __ffs(mask)) & mask) + +#define REG_CTRL 0x00 +#define REG_CTRL_SYNC 0x0001 +#define REG_CTRL_CLKPOL 0x0100 +#define REG_CTRL_CLKPHA 0x0200 +#define REG_CTRL_MSBF 0x0400 +#define REG_CTRL_TXBIL 0x1000 + +#define REG_FRAME 0x04 +#define REG_FRAME_DATABITS__MASK 0x000f +#define REG_FRAME_DATABITS(n) ((n) - 3) + +#define REG_CMD 0x0c +#define REG_CMD_RXEN 0x0001 +#define REG_CMD_RXDIS 0x0002 +#define REG_CMD_TXEN 0x0004 +#define REG_CMD_TXDIS 0x0008 +#define REG_CMD_MASTEREN 0x0010 + +#define REG_STATUS 0x10 +#define REG_STATUS_TXENS 0x0002 +#define REG_STATUS_TXC 0x0020 +#define REG_STATUS_TXBL 0x0040 +#define REG_STATUS_RXDATAV 0x0080 + +#define REG_CLKDIV 0x14 + +#define REG_RXDATAX 0x18 +#define REG_RXDATAX_RXDATA__MASK 0x01ff +#define REG_RXDATAX_PERR 0x4000 +#define REG_RXDATAX_FERR 0x8000 + +#define REG_TXDATA 0x34 + +#define REG_IF 0x40 +#define REG_IF_TXBL 0x0002 +#define REG_IF_RXDATAV 0x0004 + +#define REG_IFS 0x44 +#define REG_IFC 0x48 +#define REG_IEN 0x4c + +#define REG_ROUTE 0x54 +#define REG_ROUTE_RXPEN 0x0001 +#define REG_ROUTE_TXPEN 0x0002 +#define REG_ROUTE_CLKPEN 0x0008 +#define REG_ROUTE_LOCATION__MASK 0x0700 +#define REG_ROUTE_LOCATION(n) MASK_VAL(REG_ROUTE_LOCATION__MASK, (n)) + +struct efm32_spi_ddata { + struct spi_bitbang bitbang; + + spinlock_t lock; + + struct clk *clk; + void __iomem *base; + unsigned int rxirq, txirq; + struct efm32_spi_pdata pdata; + + /* irq data */ + struct completion done; + const u8 *tx_buf; + u8 *rx_buf; + unsigned tx_len, rx_len; + + /* chip selects */ + unsigned csgpio[]; +}; + +#define ddata_to_dev(ddata) (&(ddata->bitbang.master->dev)) +#define efm32_spi_vdbg(ddata, format, arg...) \ + dev_vdbg(ddata_to_dev(ddata), format, ##arg) + +static void efm32_spi_write32(struct efm32_spi_ddata *ddata, + u32 value, unsigned offset) +{ + writel_relaxed(value, ddata->base + offset); +} + +static u32 efm32_spi_read32(struct efm32_spi_ddata *ddata, unsigned offset) +{ + return readl_relaxed(ddata->base + offset); +} + +static void efm32_spi_chipselect(struct spi_device *spi, int is_on) +{ + struct efm32_spi_ddata *ddata = spi_master_get_devdata(spi->master); + int value = !(spi->mode & SPI_CS_HIGH) == !(is_on == BITBANG_CS_ACTIVE); + + gpio_set_value(ddata->csgpio[spi->chip_select], value); +} + +static int efm32_spi_setup_transfer(struct spi_device *spi, + struct spi_transfer *t) +{ + struct efm32_spi_ddata *ddata = spi_master_get_devdata(spi->master); + + unsigned bpw = t->bits_per_word ?: spi->bits_per_word; + unsigned speed = t->speed_hz ?: spi->max_speed_hz; + unsigned long clkfreq = clk_get_rate(ddata->clk); + u32 clkdiv; + + efm32_spi_write32(ddata, REG_CTRL_SYNC | REG_CTRL_MSBF | + (spi->mode & SPI_CPHA ? REG_CTRL_CLKPHA : 0) | + (spi->mode & SPI_CPOL ? REG_CTRL_CLKPOL : 0), REG_CTRL); + + efm32_spi_write32(ddata, + REG_FRAME_DATABITS(bpw), REG_FRAME); + + if (2 * speed >= clkfreq) + clkdiv = 0; + else + clkdiv = 64 * (DIV_ROUND_UP(2 * clkfreq, speed) - 4); + + if (clkdiv > (1U << 21)) + return -EINVAL; + + efm32_spi_write32(ddata, clkdiv, REG_CLKDIV); + efm32_spi_write32(ddata, REG_CMD_MASTEREN, REG_CMD); + efm32_spi_write32(ddata, REG_CMD_RXEN | REG_CMD_TXEN, REG_CMD); + + return 0; +} + +static void efm32_spi_tx_u8(struct efm32_spi_ddata *ddata) +{ + u8 val = 0; + + if (ddata->tx_buf) { + val = *ddata->tx_buf; + ddata->tx_buf++; + } + + ddata->tx_len--; + efm32_spi_write32(ddata, val, REG_TXDATA); + efm32_spi_vdbg(ddata, "%s: tx 0x%x\n", __func__, val); +} + +static void efm32_spi_rx_u8(struct efm32_spi_ddata *ddata) +{ + u32 rxdata = efm32_spi_read32(ddata, REG_RXDATAX); + efm32_spi_vdbg(ddata, "%s: rx 0x%x\n", __func__, rxdata); + + if (ddata->rx_buf) { + *ddata->rx_buf = rxdata; + ddata->rx_buf++; + } + + ddata->rx_len--; +} + +static void efm32_spi_filltx(struct efm32_spi_ddata *ddata) +{ + while (ddata->tx_len && + ddata->tx_len + 2 > ddata->rx_len && + efm32_spi_read32(ddata, REG_STATUS) & REG_STATUS_TXBL) { + efm32_spi_tx_u8(ddata); + } +} + +static int efm32_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) +{ + struct efm32_spi_ddata *ddata = spi_master_get_devdata(spi->master); + int ret = -EBUSY; + + spin_lock_irq(&ddata->lock); + + if (ddata->tx_buf || ddata->rx_buf) + goto out_unlock; + + ddata->tx_buf = t->tx_buf; + ddata->rx_buf = t->rx_buf; + ddata->tx_len = ddata->rx_len = + t->len * DIV_ROUND_UP(t->bits_per_word, 8); + + efm32_spi_filltx(ddata); + + init_completion(&ddata->done); + + efm32_spi_write32(ddata, REG_IF_TXBL | REG_IF_RXDATAV, REG_IEN); + + spin_unlock_irq(&ddata->lock); + + wait_for_completion(&ddata->done); + + spin_lock_irq(&ddata->lock); + + ret = t->len - max(ddata->tx_len, ddata->rx_len); + + efm32_spi_write32(ddata, 0, REG_IEN); + ddata->tx_buf = ddata->rx_buf = NULL; + +out_unlock: + spin_unlock_irq(&ddata->lock); + + return ret; +} + +static irqreturn_t efm32_spi_rxirq(int irq, void *data) +{ + struct efm32_spi_ddata *ddata = data; + irqreturn_t ret = IRQ_NONE; + + spin_lock(&ddata->lock); + + while (ddata->rx_len > 0 && + efm32_spi_read32(ddata, REG_STATUS) & + REG_STATUS_RXDATAV) { + efm32_spi_rx_u8(ddata); + + ret = IRQ_HANDLED; + } + + if (!ddata->rx_len) { + u32 ien = efm32_spi_read32(ddata, REG_IEN); + + ien &= ~REG_IF_RXDATAV; + + efm32_spi_write32(ddata, ien, REG_IEN); + + complete(&ddata->done); + } + + spin_unlock(&ddata->lock); + + return ret; +} + +static irqreturn_t efm32_spi_txirq(int irq, void *data) +{ + struct efm32_spi_ddata *ddata = data; + + efm32_spi_vdbg(ddata, + "%s: txlen = %u, rxlen = %u, if=0x%08x, stat=0x%08x\n", + __func__, ddata->tx_len, ddata->rx_len, + efm32_spi_read32(ddata, REG_IF), + efm32_spi_read32(ddata, REG_STATUS)); + + spin_lock(&ddata->lock); + + efm32_spi_filltx(ddata); + + efm32_spi_vdbg(ddata, "%s: txlen = %u, rxlen = %u\n", + __func__, ddata->tx_len, ddata->rx_len); + + if (!ddata->tx_len) { + u32 ien = efm32_spi_read32(ddata, REG_IEN); + + ien &= ~REG_IF_TXBL; + + efm32_spi_write32(ddata, ien, REG_IEN); + efm32_spi_vdbg(ddata, "disable TXBL\n"); + } + + spin_unlock(&ddata->lock); + + return IRQ_HANDLED; +} + +static const struct efm32_spi_pdata efm32_spi_pdata_default = { + .location = 1, +}; + +static u32 efm32_spi_get_configured_location(struct efm32_spi_ddata *ddata) +{ + u32 reg = efm32_spi_read32(ddata, REG_ROUTE); + + return (reg & REG_ROUTE_LOCATION__MASK) >> __ffs(REG_ROUTE_LOCATION__MASK); +} + +static int efm32_spi_probe_dt(struct platform_device *pdev, + struct spi_master *master, struct efm32_spi_ddata *ddata) +{ + struct device_node *np = pdev->dev.of_node; + u32 location; + int ret; + + if (!np) + return 1; + + ret = of_property_read_u32(np, "location", &location); + if (!ret) { + dev_dbg(&pdev->dev, "using location %u\n", location); + } else { + /* default to location configured in hardware */ + location = efm32_spi_get_configured_location(ddata); + + dev_info(&pdev->dev, "fall back to location %u\n", location); + } + + ddata->pdata.location = location; + + /* spi core takes care about the bus number using an alias */ + master->bus_num = -1; + + return 0; +} + +static int efm32_spi_probe(struct platform_device *pdev) +{ + struct efm32_spi_ddata *ddata; + struct resource *res; + int ret; + struct spi_master *master; + struct device_node *np = pdev->dev.of_node; + unsigned int num_cs, i; + + num_cs = of_gpio_named_count(np, "cs-gpios"); + + master = spi_alloc_master(&pdev->dev, + sizeof(*ddata) + num_cs * sizeof(unsigned)); + if (!master) { + dev_dbg(&pdev->dev, + "failed to allocate spi master controller\n"); + return -ENOMEM; + } + platform_set_drvdata(pdev, master); + + master->dev.of_node = pdev->dev.of_node; + + master->num_chipselect = num_cs; + master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; + master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16); + + ddata = spi_master_get_devdata(master); + + ddata->bitbang.master = spi_master_get(master); + ddata->bitbang.chipselect = efm32_spi_chipselect; + ddata->bitbang.setup_transfer = efm32_spi_setup_transfer; + ddata->bitbang.txrx_bufs = efm32_spi_txrx_bufs; + + spin_lock_init(&ddata->lock); + + ddata->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(ddata->clk)) { + ret = PTR_ERR(ddata->clk); + dev_err(&pdev->dev, "failed to get clock: %d\n", ret); + goto err; + } + + for (i = 0; i < num_cs; ++i) { + ret = of_get_named_gpio(np, "cs-gpios", i); + if (ret < 0) { + dev_err(&pdev->dev, "failed to get csgpio#%u (%d)\n", + i, ret); + goto err; + } + ddata->csgpio[i] = ret; + dev_dbg(&pdev->dev, "csgpio#%u = %u\n", i, ddata->csgpio[i]); + ret = devm_gpio_request_one(&pdev->dev, ddata->csgpio[i], + GPIOF_OUT_INIT_LOW, DRIVER_NAME); + if (ret < 0) { + dev_err(&pdev->dev, + "failed to configure csgpio#%u (%d)\n", + i, ret); + goto err; + } + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + ret = -ENODEV; + dev_err(&pdev->dev, "failed to determine base address\n"); + goto err; + } + + if (resource_size(res) < 60) { + ret = -EINVAL; + dev_err(&pdev->dev, "memory resource too small\n"); + goto err; + } + + ddata->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ddata->base)) { + ret = PTR_ERR(ddata->base); + goto err; + } + + ret = platform_get_irq(pdev, 0); + if (ret <= 0) { + dev_err(&pdev->dev, "failed to get rx irq (%d)\n", ret); + goto err; + } + + ddata->rxirq = ret; + + ret = platform_get_irq(pdev, 1); + if (ret <= 0) + ret = ddata->rxirq + 1; + + ddata->txirq = ret; + + ret = clk_prepare_enable(ddata->clk); + if (ret < 0) { + dev_err(&pdev->dev, "failed to enable clock (%d)\n", ret); + goto err; + } + + ret = efm32_spi_probe_dt(pdev, master, ddata); + if (ret > 0) { + /* not created by device tree */ + const struct efm32_spi_pdata *pdata = + dev_get_platdata(&pdev->dev); + + if (pdata) + ddata->pdata = *pdata; + else + ddata->pdata.location = + efm32_spi_get_configured_location(ddata); + + master->bus_num = pdev->id; + + } else if (ret < 0) { + goto err_disable_clk; + } + + efm32_spi_write32(ddata, 0, REG_IEN); + efm32_spi_write32(ddata, REG_ROUTE_TXPEN | REG_ROUTE_RXPEN | + REG_ROUTE_CLKPEN | + REG_ROUTE_LOCATION(ddata->pdata.location), REG_ROUTE); + + ret = request_irq(ddata->rxirq, efm32_spi_rxirq, + 0, DRIVER_NAME " rx", ddata); + if (ret) { + dev_err(&pdev->dev, "failed to register rxirq (%d)\n", ret); + goto err_disable_clk; + } + + ret = request_irq(ddata->txirq, efm32_spi_txirq, + 0, DRIVER_NAME " tx", ddata); + if (ret) { + dev_err(&pdev->dev, "failed to register txirq (%d)\n", ret); + goto err_free_rx_irq; + } + + ret = spi_bitbang_start(&ddata->bitbang); + if (ret) { + dev_err(&pdev->dev, "spi_bitbang_start failed (%d)\n", ret); + + free_irq(ddata->txirq, ddata); +err_free_rx_irq: + free_irq(ddata->rxirq, ddata); +err_disable_clk: + clk_disable_unprepare(ddata->clk); +err: + spi_master_put(master); + kfree(master); + } + + return ret; +} + +static int efm32_spi_remove(struct platform_device *pdev) +{ + struct spi_master *master = platform_get_drvdata(pdev); + struct efm32_spi_ddata *ddata = spi_master_get_devdata(master); + + efm32_spi_write32(ddata, 0, REG_IEN); + + free_irq(ddata->txirq, ddata); + free_irq(ddata->rxirq, ddata); + clk_disable_unprepare(ddata->clk); + spi_master_put(master); + kfree(master); + + return 0; +} + +static const struct of_device_id efm32_spi_dt_ids[] = { + { + .compatible = "efm32,spi", + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, efm32_spi_dt_ids); + +static struct platform_driver efm32_spi_driver = { + .probe = efm32_spi_probe, + .remove = efm32_spi_remove, + + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + .of_match_table = efm32_spi_dt_ids, + }, +}; +module_platform_driver(efm32_spi_driver); + +MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>"); +MODULE_DESCRIPTION("EFM32 SPI driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRIVER_NAME); diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c index cad30b8a1d71..d22c00a227b6 100644 --- a/drivers/spi/spi-ep93xx.c +++ b/drivers/spi/spi-ep93xx.c @@ -26,7 +26,6 @@ #include <linux/interrupt.h> #include <linux/module.h> #include <linux/platform_device.h> -#include <linux/workqueue.h> #include <linux/sched.h> #include <linux/scatterlist.h> #include <linux/spi/spi.h> @@ -70,19 +69,13 @@ /** * struct ep93xx_spi - EP93xx SPI controller structure - * @lock: spinlock that protects concurrent accesses to fields @running, - * @current_msg and @msg_queue * @pdev: pointer to platform device * @clk: clock for the controller * @regs_base: pointer to ioremap()'d registers * @sspdr_phys: physical address of the SSPDR register * @min_rate: minimum clock rate (in Hz) supported by the controller * @max_rate: maximum clock rate (in Hz) supported by the controller - * @running: is the queue running - * @wq: workqueue used by the driver - * @msg_work: work that is queued for the driver * @wait: wait here until given transfer is completed - * @msg_queue: queue for the messages * @current_msg: message that is currently processed (or %NULL if none) * @tx: current byte in transfer to transmit * @rx: current byte in transfer to receive @@ -96,30 +89,15 @@ * @tx_sgt: sg table for TX transfers * @zeropage: dummy page used as RX buffer when only TX buffer is passed in by * the client - * - * This structure holds EP93xx SPI controller specific information. When - * @running is %true, driver accepts transfer requests from protocol drivers. - * @current_msg is used to hold pointer to the message that is currently - * processed. If @current_msg is %NULL, it means that no processing is going - * on. - * - * Most of the fields are only written once and they can be accessed without - * taking the @lock. Fields that are accessed concurrently are: @current_msg, - * @running, and @msg_queue. */ struct ep93xx_spi { - spinlock_t lock; const struct platform_device *pdev; struct clk *clk; void __iomem *regs_base; unsigned long sspdr_phys; unsigned long min_rate; unsigned long max_rate; - bool running; - struct workqueue_struct *wq; - struct work_struct msg_work; struct completion wait; - struct list_head msg_queue; struct spi_message *current_msg; size_t tx; size_t rx; @@ -136,50 +114,36 @@ struct ep93xx_spi { /** * struct ep93xx_spi_chip - SPI device hardware settings * @spi: back pointer to the SPI device - * @rate: max rate in hz this chip supports - * @div_cpsr: cpsr (pre-scaler) divider - * @div_scr: scr divider - * @dss: bits per word (4 - 16 bits) * @ops: private chip operations - * - * This structure is used to store hardware register specific settings for each - * SPI device. Settings are written to hardware by function - * ep93xx_spi_chip_setup(). */ struct ep93xx_spi_chip { const struct spi_device *spi; - unsigned long rate; - u8 div_cpsr; - u8 div_scr; - u8 dss; struct ep93xx_spi_chip_ops *ops; }; /* converts bits per word to CR0.DSS value */ #define bits_per_word_to_dss(bpw) ((bpw) - 1) -static inline void -ep93xx_spi_write_u8(const struct ep93xx_spi *espi, u16 reg, u8 value) +static void ep93xx_spi_write_u8(const struct ep93xx_spi *espi, + u16 reg, u8 value) { - __raw_writeb(value, espi->regs_base + reg); + writeb(value, espi->regs_base + reg); } -static inline u8 -ep93xx_spi_read_u8(const struct ep93xx_spi *spi, u16 reg) +static u8 ep93xx_spi_read_u8(const struct ep93xx_spi *spi, u16 reg) { - return __raw_readb(spi->regs_base + reg); + return readb(spi->regs_base + reg); } -static inline void -ep93xx_spi_write_u16(const struct ep93xx_spi *espi, u16 reg, u16 value) +static void ep93xx_spi_write_u16(const struct ep93xx_spi *espi, + u16 reg, u16 value) { - __raw_writew(value, espi->regs_base + reg); + writew(value, espi->regs_base + reg); } -static inline u16 -ep93xx_spi_read_u16(const struct ep93xx_spi *spi, u16 reg) +static u16 ep93xx_spi_read_u16(const struct ep93xx_spi *spi, u16 reg) { - return __raw_readw(spi->regs_base + reg); + return readw(spi->regs_base + reg); } static int ep93xx_spi_enable(const struct ep93xx_spi *espi) @@ -230,17 +194,13 @@ static void ep93xx_spi_disable_interrupts(const struct ep93xx_spi *espi) /** * ep93xx_spi_calc_divisors() - calculates SPI clock divisors * @espi: ep93xx SPI controller struct - * @chip: divisors are calculated for this chip * @rate: desired SPI output clock rate - * - * Function calculates cpsr (clock pre-scaler) and scr divisors based on - * given @rate and places them to @chip->div_cpsr and @chip->div_scr. If, - * for some reason, divisors cannot be calculated nothing is stored and - * %-EINVAL is returned. + * @div_cpsr: pointer to return the cpsr (pre-scaler) divider + * @div_scr: pointer to return the scr divider */ static int ep93xx_spi_calc_divisors(const struct ep93xx_spi *espi, - struct ep93xx_spi_chip *chip, - unsigned long rate) + unsigned long rate, + u8 *div_cpsr, u8 *div_scr) { unsigned long spi_clk_rate = clk_get_rate(espi->clk); int cpsr, scr; @@ -248,7 +208,7 @@ static int ep93xx_spi_calc_divisors(const struct ep93xx_spi *espi, /* * Make sure that max value is between values supported by the * controller. Note that minimum value is already checked in - * ep93xx_spi_transfer(). + * ep93xx_spi_transfer_one_message(). */ rate = clamp(rate, espi->min_rate, espi->max_rate); @@ -263,8 +223,8 @@ static int ep93xx_spi_calc_divisors(const struct ep93xx_spi *espi, for (cpsr = 2; cpsr <= 254; cpsr += 2) { for (scr = 0; scr <= 255; scr++) { if ((spi_clk_rate / (cpsr * (scr + 1))) <= rate) { - chip->div_scr = (u8)scr; - chip->div_cpsr = (u8)cpsr; + *div_scr = (u8)scr; + *div_cpsr = (u8)cpsr; return 0; } } @@ -319,73 +279,11 @@ static int ep93xx_spi_setup(struct spi_device *spi) spi_set_ctldata(spi, chip); } - if (spi->max_speed_hz != chip->rate) { - int err; - - err = ep93xx_spi_calc_divisors(espi, chip, spi->max_speed_hz); - if (err != 0) { - spi_set_ctldata(spi, NULL); - kfree(chip); - return err; - } - chip->rate = spi->max_speed_hz; - } - - chip->dss = bits_per_word_to_dss(spi->bits_per_word); - ep93xx_spi_cs_control(spi, false); return 0; } /** - * ep93xx_spi_transfer() - queue message to be transferred - * @spi: target SPI device - * @msg: message to be transferred - * - * This function is called by SPI device drivers when they are going to transfer - * a new message. It simply puts the message in the queue and schedules - * workqueue to perform the actual transfer later on. - * - * Returns %0 on success and negative error in case of failure. - */ -static int ep93xx_spi_transfer(struct spi_device *spi, struct spi_message *msg) -{ - struct ep93xx_spi *espi = spi_master_get_devdata(spi->master); - struct spi_transfer *t; - unsigned long flags; - - if (!msg || !msg->complete) - return -EINVAL; - - /* first validate each transfer */ - list_for_each_entry(t, &msg->transfers, transfer_list) { - if (t->speed_hz && t->speed_hz < espi->min_rate) - return -EINVAL; - } - - /* - * Now that we own the message, let's initialize it so that it is - * suitable for us. We use @msg->status to signal whether there was - * error in transfer and @msg->state is used to hold pointer to the - * current transfer (or %NULL if no active current transfer). - */ - msg->state = NULL; - msg->status = 0; - msg->actual_length = 0; - - spin_lock_irqsave(&espi->lock, flags); - if (!espi->running) { - spin_unlock_irqrestore(&espi->lock, flags); - return -ESHUTDOWN; - } - list_add_tail(&msg->queue, &espi->msg_queue); - queue_work(espi->wq, &espi->msg_work); - spin_unlock_irqrestore(&espi->lock, flags); - - return 0; -} - -/** * ep93xx_spi_cleanup() - cleans up master controller specific state * @spi: SPI device to cleanup * @@ -409,39 +307,40 @@ static void ep93xx_spi_cleanup(struct spi_device *spi) * ep93xx_spi_chip_setup() - configures hardware according to given @chip * @espi: ep93xx SPI controller struct * @chip: chip specific settings - * - * This function sets up the actual hardware registers with settings given in - * @chip. Note that no validation is done so make sure that callers validate - * settings before calling this. + * @speed_hz: transfer speed + * @bits_per_word: transfer bits_per_word */ -static void ep93xx_spi_chip_setup(const struct ep93xx_spi *espi, - const struct ep93xx_spi_chip *chip) +static int ep93xx_spi_chip_setup(const struct ep93xx_spi *espi, + const struct ep93xx_spi_chip *chip, + u32 speed_hz, u8 bits_per_word) { + u8 dss = bits_per_word_to_dss(bits_per_word); + u8 div_cpsr = 0; + u8 div_scr = 0; u16 cr0; + int err; - cr0 = chip->div_scr << SSPCR0_SCR_SHIFT; + err = ep93xx_spi_calc_divisors(espi, speed_hz, &div_cpsr, &div_scr); + if (err) + return err; + + cr0 = div_scr << SSPCR0_SCR_SHIFT; cr0 |= (chip->spi->mode & (SPI_CPHA|SPI_CPOL)) << SSPCR0_MODE_SHIFT; - cr0 |= chip->dss; + cr0 |= dss; dev_dbg(&espi->pdev->dev, "setup: mode %d, cpsr %d, scr %d, dss %d\n", - chip->spi->mode, chip->div_cpsr, chip->div_scr, chip->dss); + chip->spi->mode, div_cpsr, div_scr, dss); dev_dbg(&espi->pdev->dev, "setup: cr0 %#x", cr0); - ep93xx_spi_write_u8(espi, SSPCPSR, chip->div_cpsr); + ep93xx_spi_write_u8(espi, SSPCPSR, div_cpsr); ep93xx_spi_write_u16(espi, SSPCR0, cr0); -} - -static inline int bits_per_word(const struct ep93xx_spi *espi) -{ - struct spi_message *msg = espi->current_msg; - struct spi_transfer *t = msg->state; - return t->bits_per_word; + return 0; } static void ep93xx_do_write(struct ep93xx_spi *espi, struct spi_transfer *t) { - if (bits_per_word(espi) > 8) { + if (t->bits_per_word > 8) { u16 tx_val = 0; if (t->tx_buf) @@ -460,7 +359,7 @@ static void ep93xx_do_write(struct ep93xx_spi *espi, struct spi_transfer *t) static void ep93xx_do_read(struct ep93xx_spi *espi, struct spi_transfer *t) { - if (bits_per_word(espi) > 8) { + if (t->bits_per_word > 8) { u16 rx_val; rx_val = ep93xx_spi_read_u16(espi, SSPDR); @@ -546,7 +445,7 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_transfer_direction dir) size_t len = t->len; int i, ret, nents; - if (bits_per_word(espi) > 8) + if (t->bits_per_word > 8) buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; else buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE; @@ -610,7 +509,7 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_transfer_direction dir) } if (WARN_ON(len)) { - dev_warn(&espi->pdev->dev, "len = %d expected 0!", len); + dev_warn(&espi->pdev->dev, "len = %zu expected 0!", len); return ERR_PTR(-EINVAL); } @@ -708,37 +607,16 @@ static void ep93xx_spi_process_transfer(struct ep93xx_spi *espi, struct spi_transfer *t) { struct ep93xx_spi_chip *chip = spi_get_ctldata(msg->spi); + int err; msg->state = t; - /* - * Handle any transfer specific settings if needed. We use - * temporary chip settings here and restore original later when - * the transfer is finished. - */ - if (t->speed_hz || t->bits_per_word) { - struct ep93xx_spi_chip tmp_chip = *chip; - - if (t->speed_hz) { - int err; - - err = ep93xx_spi_calc_divisors(espi, &tmp_chip, - t->speed_hz); - if (err) { - dev_err(&espi->pdev->dev, - "failed to adjust speed\n"); - msg->status = err; - return; - } - } - - if (t->bits_per_word) - tmp_chip.dss = bits_per_word_to_dss(t->bits_per_word); - - /* - * Set up temporary new hw settings for this transfer. - */ - ep93xx_spi_chip_setup(espi, &tmp_chip); + err = ep93xx_spi_chip_setup(espi, chip, t->speed_hz, t->bits_per_word); + if (err) { + dev_err(&espi->pdev->dev, + "failed to setup chip for transfer\n"); + msg->status = err; + return; } espi->rx = 0; @@ -783,9 +661,6 @@ static void ep93xx_spi_process_transfer(struct ep93xx_spi *espi, ep93xx_spi_cs_control(msg->spi, true); } } - - if (t->speed_hz || t->bits_per_word) - ep93xx_spi_chip_setup(espi, chip); } /* @@ -838,10 +713,8 @@ static void ep93xx_spi_process_message(struct ep93xx_spi *espi, espi->fifo_level = 0; /* - * Update SPI controller registers according to spi device and assert - * the chipselect. + * Assert the chipselect. */ - ep93xx_spi_chip_setup(espi, spi_get_ctldata(msg->spi)); ep93xx_spi_cs_control(msg->spi, true); list_for_each_entry(t, &msg->transfers, transfer_list) { @@ -858,50 +731,29 @@ static void ep93xx_spi_process_message(struct ep93xx_spi *espi, ep93xx_spi_disable(espi); } -#define work_to_espi(work) (container_of((work), struct ep93xx_spi, msg_work)) - -/** - * ep93xx_spi_work() - EP93xx SPI workqueue worker function - * @work: work struct - * - * Workqueue worker function. This function is called when there are new - * SPI messages to be processed. Message is taken out from the queue and then - * passed to ep93xx_spi_process_message(). - * - * After message is transferred, protocol driver is notified by calling - * @msg->complete(). In case of error, @msg->status is set to negative error - * number, otherwise it contains zero (and @msg->actual_length is updated). - */ -static void ep93xx_spi_work(struct work_struct *work) +static int ep93xx_spi_transfer_one_message(struct spi_master *master, + struct spi_message *msg) { - struct ep93xx_spi *espi = work_to_espi(work); - struct spi_message *msg; + struct ep93xx_spi *espi = spi_master_get_devdata(master); + struct spi_transfer *t; - spin_lock_irq(&espi->lock); - if (!espi->running || espi->current_msg || - list_empty(&espi->msg_queue)) { - spin_unlock_irq(&espi->lock); - return; + /* first validate each transfer */ + list_for_each_entry(t, &msg->transfers, transfer_list) { + if (t->speed_hz < espi->min_rate) + return -EINVAL; } - msg = list_first_entry(&espi->msg_queue, struct spi_message, queue); - list_del_init(&msg->queue); - espi->current_msg = msg; - spin_unlock_irq(&espi->lock); - ep93xx_spi_process_message(espi, msg); + msg->state = NULL; + msg->status = 0; + msg->actual_length = 0; - /* - * Update the current message and re-schedule ourselves if there are - * more messages in the queue. - */ - spin_lock_irq(&espi->lock); + espi->current_msg = msg; + ep93xx_spi_process_message(espi, msg); espi->current_msg = NULL; - if (espi->running && !list_empty(&espi->msg_queue)) - queue_work(espi->wq, &espi->msg_work); - spin_unlock_irq(&espi->lock); - /* notify the protocol driver that we are done with this message */ - msg->complete(msg->context); + spi_finalize_current_message(master); + + return 0; } static irqreturn_t ep93xx_spi_interrupt(int irq, void *dev_id) @@ -1022,16 +874,26 @@ static int ep93xx_spi_probe(struct platform_device *pdev) int irq; int error; - info = pdev->dev.platform_data; + info = dev_get_platdata(&pdev->dev); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "failed to get irq resources\n"); + return -EBUSY; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "unable to get iomem resource\n"); + return -ENODEV; + } master = spi_alloc_master(&pdev->dev, sizeof(*espi)); - if (!master) { - dev_err(&pdev->dev, "failed to allocate spi master\n"); + if (!master) return -ENOMEM; - } master->setup = ep93xx_spi_setup; - master->transfer = ep93xx_spi_transfer; + master->transfer_one_message = ep93xx_spi_transfer_one_message; master->cleanup = ep93xx_spi_cleanup; master->bus_num = pdev->id; master->num_chipselect = info->num_chipselect; @@ -1042,14 +904,13 @@ static int ep93xx_spi_probe(struct platform_device *pdev) espi = spi_master_get_devdata(master); - espi->clk = clk_get(&pdev->dev, NULL); + espi->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(espi->clk)) { dev_err(&pdev->dev, "unable to get spi clock\n"); error = PTR_ERR(espi->clk); goto fail_release_master; } - spin_lock_init(&espi->lock); init_completion(&espi->wait); /* @@ -1060,55 +921,31 @@ static int ep93xx_spi_probe(struct platform_device *pdev) espi->min_rate = clk_get_rate(espi->clk) / (254 * 256); espi->pdev = pdev; - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - error = -EBUSY; - dev_err(&pdev->dev, "failed to get irq resources\n"); - goto fail_put_clock; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "unable to get iomem resource\n"); - error = -ENODEV; - goto fail_put_clock; - } - espi->sspdr_phys = res->start + SSPDR; espi->regs_base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(espi->regs_base)) { error = PTR_ERR(espi->regs_base); - goto fail_put_clock; + goto fail_release_master; } error = devm_request_irq(&pdev->dev, irq, ep93xx_spi_interrupt, 0, "ep93xx-spi", espi); if (error) { dev_err(&pdev->dev, "failed to request irq\n"); - goto fail_put_clock; + goto fail_release_master; } if (info->use_dma && ep93xx_spi_setup_dma(espi)) dev_warn(&pdev->dev, "DMA setup failed. Falling back to PIO\n"); - espi->wq = create_singlethread_workqueue("ep93xx_spid"); - if (!espi->wq) { - dev_err(&pdev->dev, "unable to create workqueue\n"); - error = -ENOMEM; - goto fail_free_dma; - } - INIT_WORK(&espi->msg_work, ep93xx_spi_work); - INIT_LIST_HEAD(&espi->msg_queue); - espi->running = true; - /* make sure that the hardware is disabled */ ep93xx_spi_write_u8(espi, SSPCR1, 0); error = spi_register_master(master); if (error) { dev_err(&pdev->dev, "failed to register SPI master\n"); - goto fail_free_queue; + goto fail_free_dma; } dev_info(&pdev->dev, "EP93xx SPI Controller at 0x%08lx irq %d\n", @@ -1116,12 +953,8 @@ static int ep93xx_spi_probe(struct platform_device *pdev) return 0; -fail_free_queue: - destroy_workqueue(espi->wq); fail_free_dma: ep93xx_spi_release_dma(espi); -fail_put_clock: - clk_put(espi->clk); fail_release_master: spi_master_put(master); @@ -1133,31 +966,7 @@ static int ep93xx_spi_remove(struct platform_device *pdev) struct spi_master *master = platform_get_drvdata(pdev); struct ep93xx_spi *espi = spi_master_get_devdata(master); - spin_lock_irq(&espi->lock); - espi->running = false; - spin_unlock_irq(&espi->lock); - - destroy_workqueue(espi->wq); - - /* - * Complete remaining messages with %-ESHUTDOWN status. - */ - spin_lock_irq(&espi->lock); - while (!list_empty(&espi->msg_queue)) { - struct spi_message *msg; - - msg = list_first_entry(&espi->msg_queue, - struct spi_message, queue); - list_del_init(&msg->queue); - msg->status = -ESHUTDOWN; - spin_unlock_irq(&espi->lock); - msg->complete(msg->context); - spin_lock_irq(&espi->lock); - } - spin_unlock_irq(&espi->lock); - ep93xx_spi_release_dma(espi); - clk_put(espi->clk); spi_unregister_master(master); return 0; diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c new file mode 100644 index 000000000000..6cd07d13ecab --- /dev/null +++ b/drivers/spi/spi-fsl-dspi.c @@ -0,0 +1,557 @@ +/* + * drivers/spi/spi-fsl-dspi.c + * + * Copyright 2013 Freescale Semiconductor, Inc. + * + * Freescale DSPI driver + * This file contains a driver for the Freescale DSPI + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/errno.h> +#include <linux/platform_device.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/spi/spi.h> +#include <linux/spi/spi_bitbang.h> +#include <linux/pm_runtime.h> +#include <linux/of.h> +#include <linux/of_device.h> + +#define DRIVER_NAME "fsl-dspi" + +#define TRAN_STATE_RX_VOID 0x01 +#define TRAN_STATE_TX_VOID 0x02 +#define TRAN_STATE_WORD_ODD_NUM 0x04 + +#define DSPI_FIFO_SIZE 4 + +#define SPI_MCR 0x00 +#define SPI_MCR_MASTER (1 << 31) +#define SPI_MCR_PCSIS (0x3F << 16) +#define SPI_MCR_CLR_TXF (1 << 11) +#define SPI_MCR_CLR_RXF (1 << 10) + +#define SPI_TCR 0x08 + +#define SPI_CTAR(x) (0x0c + (x * 4)) +#define SPI_CTAR_FMSZ(x) (((x) & 0x0000000f) << 27) +#define SPI_CTAR_CPOL(x) ((x) << 26) +#define SPI_CTAR_CPHA(x) ((x) << 25) +#define SPI_CTAR_LSBFE(x) ((x) << 24) +#define SPI_CTAR_PCSSCR(x) (((x) & 0x00000003) << 22) +#define SPI_CTAR_PASC(x) (((x) & 0x00000003) << 20) +#define SPI_CTAR_PDT(x) (((x) & 0x00000003) << 18) +#define SPI_CTAR_PBR(x) (((x) & 0x00000003) << 16) +#define SPI_CTAR_CSSCK(x) (((x) & 0x0000000f) << 12) +#define SPI_CTAR_ASC(x) (((x) & 0x0000000f) << 8) +#define SPI_CTAR_DT(x) (((x) & 0x0000000f) << 4) +#define SPI_CTAR_BR(x) ((x) & 0x0000000f) + +#define SPI_CTAR0_SLAVE 0x0c + +#define SPI_SR 0x2c +#define SPI_SR_EOQF 0x10000000 + +#define SPI_RSER 0x30 +#define SPI_RSER_EOQFE 0x10000000 + +#define SPI_PUSHR 0x34 +#define SPI_PUSHR_CONT (1 << 31) +#define SPI_PUSHR_CTAS(x) (((x) & 0x00000007) << 28) +#define SPI_PUSHR_EOQ (1 << 27) +#define SPI_PUSHR_CTCNT (1 << 26) +#define SPI_PUSHR_PCS(x) (((1 << x) & 0x0000003f) << 16) +#define SPI_PUSHR_TXDATA(x) ((x) & 0x0000ffff) + +#define SPI_PUSHR_SLAVE 0x34 + +#define SPI_POPR 0x38 +#define SPI_POPR_RXDATA(x) ((x) & 0x0000ffff) + +#define SPI_TXFR0 0x3c +#define SPI_TXFR1 0x40 +#define SPI_TXFR2 0x44 +#define SPI_TXFR3 0x48 +#define SPI_RXFR0 0x7c +#define SPI_RXFR1 0x80 +#define SPI_RXFR2 0x84 +#define SPI_RXFR3 0x88 + +#define SPI_FRAME_BITS(bits) SPI_CTAR_FMSZ((bits) - 1) +#define SPI_FRAME_BITS_MASK SPI_CTAR_FMSZ(0xf) +#define SPI_FRAME_BITS_16 SPI_CTAR_FMSZ(0xf) +#define SPI_FRAME_BITS_8 SPI_CTAR_FMSZ(0x7) + +#define SPI_CS_INIT 0x01 +#define SPI_CS_ASSERT 0x02 +#define SPI_CS_DROP 0x04 + +struct chip_data { + u32 mcr_val; + u32 ctar_val; + u16 void_write_data; +}; + +struct fsl_dspi { + struct spi_bitbang bitbang; + struct platform_device *pdev; + + void *base; + int irq; + struct clk *clk; + + struct spi_transfer *cur_transfer; + struct chip_data *cur_chip; + size_t len; + void *tx; + void *tx_end; + void *rx; + void *rx_end; + char dataflags; + u8 cs; + u16 void_write_data; + + wait_queue_head_t waitq; + u32 waitflags; +}; + +static inline int is_double_byte_mode(struct fsl_dspi *dspi) +{ + return ((readl(dspi->base + SPI_CTAR(dspi->cs)) & SPI_FRAME_BITS_MASK) + == SPI_FRAME_BITS(8)) ? 0 : 1; +} + +static void set_bit_mode(struct fsl_dspi *dspi, unsigned char bits) +{ + u32 temp; + + temp = readl(dspi->base + SPI_CTAR(dspi->cs)); + temp &= ~SPI_FRAME_BITS_MASK; + temp |= SPI_FRAME_BITS(bits); + writel(temp, dspi->base + SPI_CTAR(dspi->cs)); +} + +static void hz_to_spi_baud(char *pbr, char *br, int speed_hz, + unsigned long clkrate) +{ + /* Valid baud rate pre-scaler values */ + int pbr_tbl[4] = {2, 3, 5, 7}; + int brs[16] = { 2, 4, 6, 8, + 16, 32, 64, 128, + 256, 512, 1024, 2048, + 4096, 8192, 16384, 32768 }; + int temp, i = 0, j = 0; + + temp = clkrate / 2 / speed_hz; + + for (i = 0; i < ARRAY_SIZE(pbr_tbl); i++) + for (j = 0; j < ARRAY_SIZE(brs); j++) { + if (pbr_tbl[i] * brs[j] >= temp) { + *pbr = i; + *br = j; + return; + } + } + + pr_warn("Can not find valid buad rate,speed_hz is %d,clkrate is %ld\ + ,we use the max prescaler value.\n", speed_hz, clkrate); + *pbr = ARRAY_SIZE(pbr_tbl) - 1; + *br = ARRAY_SIZE(brs) - 1; +} + +static int dspi_transfer_write(struct fsl_dspi *dspi) +{ + int tx_count = 0; + int tx_word; + u16 d16; + u8 d8; + u32 dspi_pushr = 0; + int first = 1; + + tx_word = is_double_byte_mode(dspi); + + /* If we are in word mode, but only have a single byte to transfer + * then switch to byte mode temporarily. Will switch back at the + * end of the transfer. + */ + if (tx_word && (dspi->len == 1)) { + dspi->dataflags |= TRAN_STATE_WORD_ODD_NUM; + set_bit_mode(dspi, 8); + tx_word = 0; + } + + while (dspi->len && (tx_count < DSPI_FIFO_SIZE)) { + if (tx_word) { + if (dspi->len == 1) + break; + + if (!(dspi->dataflags & TRAN_STATE_TX_VOID)) { + d16 = *(u16 *)dspi->tx; + dspi->tx += 2; + } else { + d16 = dspi->void_write_data; + } + + dspi_pushr = SPI_PUSHR_TXDATA(d16) | + SPI_PUSHR_PCS(dspi->cs) | + SPI_PUSHR_CTAS(dspi->cs) | + SPI_PUSHR_CONT; + + dspi->len -= 2; + } else { + if (!(dspi->dataflags & TRAN_STATE_TX_VOID)) { + + d8 = *(u8 *)dspi->tx; + dspi->tx++; + } else { + d8 = (u8)dspi->void_write_data; + } + + dspi_pushr = SPI_PUSHR_TXDATA(d8) | + SPI_PUSHR_PCS(dspi->cs) | + SPI_PUSHR_CTAS(dspi->cs) | + SPI_PUSHR_CONT; + + dspi->len--; + } + + if (dspi->len == 0 || tx_count == DSPI_FIFO_SIZE - 1) { + /* last transfer in the transfer */ + dspi_pushr |= SPI_PUSHR_EOQ; + } else if (tx_word && (dspi->len == 1)) + dspi_pushr |= SPI_PUSHR_EOQ; + + if (first) { + first = 0; + dspi_pushr |= SPI_PUSHR_CTCNT; /* clear counter */ + } + + writel(dspi_pushr, dspi->base + SPI_PUSHR); + tx_count++; + } + + return tx_count * (tx_word + 1); +} + +static int dspi_transfer_read(struct fsl_dspi *dspi) +{ + int rx_count = 0; + int rx_word = is_double_byte_mode(dspi); + u16 d; + while ((dspi->rx < dspi->rx_end) + && (rx_count < DSPI_FIFO_SIZE)) { + if (rx_word) { + if ((dspi->rx_end - dspi->rx) == 1) + break; + + d = SPI_POPR_RXDATA(readl(dspi->base + SPI_POPR)); + + if (!(dspi->dataflags & TRAN_STATE_RX_VOID)) + *(u16 *)dspi->rx = d; + dspi->rx += 2; + + } else { + d = SPI_POPR_RXDATA(readl(dspi->base + SPI_POPR)); + if (!(dspi->dataflags & TRAN_STATE_RX_VOID)) + *(u8 *)dspi->rx = d; + dspi->rx++; + } + rx_count++; + } + + return rx_count; +} + +static int dspi_txrx_transfer(struct spi_device *spi, struct spi_transfer *t) +{ + struct fsl_dspi *dspi = spi_master_get_devdata(spi->master); + dspi->cur_transfer = t; + dspi->cur_chip = spi_get_ctldata(spi); + dspi->cs = spi->chip_select; + dspi->void_write_data = dspi->cur_chip->void_write_data; + + dspi->dataflags = 0; + dspi->tx = (void *)t->tx_buf; + dspi->tx_end = dspi->tx + t->len; + dspi->rx = t->rx_buf; + dspi->rx_end = dspi->rx + t->len; + dspi->len = t->len; + + if (!dspi->rx) + dspi->dataflags |= TRAN_STATE_RX_VOID; + + if (!dspi->tx) + dspi->dataflags |= TRAN_STATE_TX_VOID; + + writel(dspi->cur_chip->mcr_val, dspi->base + SPI_MCR); + writel(dspi->cur_chip->ctar_val, dspi->base + SPI_CTAR(dspi->cs)); + writel(SPI_RSER_EOQFE, dspi->base + SPI_RSER); + + if (t->speed_hz) + writel(dspi->cur_chip->ctar_val, + dspi->base + SPI_CTAR(dspi->cs)); + + dspi_transfer_write(dspi); + + if (wait_event_interruptible(dspi->waitq, dspi->waitflags)) + dev_err(&dspi->pdev->dev, "wait transfer complete fail!\n"); + dspi->waitflags = 0; + + return t->len - dspi->len; +} + +static void dspi_chipselect(struct spi_device *spi, int value) +{ + struct fsl_dspi *dspi = spi_master_get_devdata(spi->master); + u32 pushr = readl(dspi->base + SPI_PUSHR); + + switch (value) { + case BITBANG_CS_ACTIVE: + pushr |= SPI_PUSHR_CONT; + case BITBANG_CS_INACTIVE: + pushr &= ~SPI_PUSHR_CONT; + } + + writel(pushr, dspi->base + SPI_PUSHR); +} + +static int dspi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) +{ + struct chip_data *chip; + struct fsl_dspi *dspi = spi_master_get_devdata(spi->master); + unsigned char br = 0, pbr = 0, fmsz = 0; + + /* Only alloc on first setup */ + chip = spi_get_ctldata(spi); + if (chip == NULL) { + chip = kcalloc(1, sizeof(struct chip_data), GFP_KERNEL); + if (!chip) + return -ENOMEM; + } + + chip->mcr_val = SPI_MCR_MASTER | SPI_MCR_PCSIS | + SPI_MCR_CLR_TXF | SPI_MCR_CLR_RXF; + if ((spi->bits_per_word >= 4) && (spi->bits_per_word <= 16)) { + fmsz = spi->bits_per_word - 1; + } else { + pr_err("Invalid wordsize\n"); + kfree(chip); + return -ENODEV; + } + + chip->void_write_data = 0; + + hz_to_spi_baud(&pbr, &br, + spi->max_speed_hz, clk_get_rate(dspi->clk)); + + chip->ctar_val = SPI_CTAR_FMSZ(fmsz) + | SPI_CTAR_CPOL(spi->mode & SPI_CPOL ? 1 : 0) + | SPI_CTAR_CPHA(spi->mode & SPI_CPHA ? 1 : 0) + | SPI_CTAR_LSBFE(spi->mode & SPI_LSB_FIRST ? 1 : 0) + | SPI_CTAR_PBR(pbr) + | SPI_CTAR_BR(br); + + spi_set_ctldata(spi, chip); + + return 0; +} + +static int dspi_setup(struct spi_device *spi) +{ + if (!spi->max_speed_hz) + return -EINVAL; + + if (!spi->bits_per_word) + spi->bits_per_word = 8; + + return dspi_setup_transfer(spi, NULL); +} + +static irqreturn_t dspi_interrupt(int irq, void *dev_id) +{ + struct fsl_dspi *dspi = (struct fsl_dspi *)dev_id; + + writel(SPI_SR_EOQF, dspi->base + SPI_SR); + + dspi_transfer_read(dspi); + + if (!dspi->len) { + if (dspi->dataflags & TRAN_STATE_WORD_ODD_NUM) + set_bit_mode(dspi, 16); + dspi->waitflags = 1; + wake_up_interruptible(&dspi->waitq); + } else { + dspi_transfer_write(dspi); + + return IRQ_HANDLED; + } + + return IRQ_HANDLED; +} + +static struct of_device_id fsl_dspi_dt_ids[] = { + { .compatible = "fsl,vf610-dspi", .data = NULL, }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, fsl_dspi_dt_ids); + +#ifdef CONFIG_PM_SLEEP +static int dspi_suspend(struct device *dev) +{ + struct spi_master *master = dev_get_drvdata(dev); + struct fsl_dspi *dspi = spi_master_get_devdata(master); + + spi_master_suspend(master); + clk_disable_unprepare(dspi->clk); + + return 0; +} + +static int dspi_resume(struct device *dev) +{ + + struct spi_master *master = dev_get_drvdata(dev); + struct fsl_dspi *dspi = spi_master_get_devdata(master); + + clk_prepare_enable(dspi->clk); + spi_master_resume(master); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops dspi_pm = { + SET_SYSTEM_SLEEP_PM_OPS(dspi_suspend, dspi_resume) +}; + +static int dspi_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct spi_master *master; + struct fsl_dspi *dspi; + struct resource *res; + int ret = 0, cs_num, bus_num; + + master = spi_alloc_master(&pdev->dev, sizeof(struct fsl_dspi)); + if (!master) + return -ENOMEM; + + dspi = spi_master_get_devdata(master); + dspi->pdev = pdev; + dspi->bitbang.master = spi_master_get(master); + dspi->bitbang.chipselect = dspi_chipselect; + dspi->bitbang.setup_transfer = dspi_setup_transfer; + dspi->bitbang.txrx_bufs = dspi_txrx_transfer; + dspi->bitbang.master->setup = dspi_setup; + dspi->bitbang.master->dev.of_node = pdev->dev.of_node; + + master->mode_bits = SPI_CPOL | SPI_CPHA; + master->bits_per_word_mask = SPI_BPW_MASK(4) | SPI_BPW_MASK(8) | + SPI_BPW_MASK(16); + + ret = of_property_read_u32(np, "spi-num-chipselects", &cs_num); + if (ret < 0) { + dev_err(&pdev->dev, "can't get spi-num-chipselects\n"); + goto out_master_put; + } + master->num_chipselect = cs_num; + + ret = of_property_read_u32(np, "bus-num", &bus_num); + if (ret < 0) { + dev_err(&pdev->dev, "can't get bus-num\n"); + goto out_master_put; + } + master->bus_num = bus_num; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "can't get platform resource\n"); + ret = -EINVAL; + goto out_master_put; + } + + dspi->base = devm_ioremap_resource(&pdev->dev, res); + if (!dspi->base) { + ret = -EINVAL; + goto out_master_put; + } + + dspi->irq = platform_get_irq(pdev, 0); + if (dspi->irq < 0) { + dev_err(&pdev->dev, "can't get platform irq\n"); + ret = dspi->irq; + goto out_master_put; + } + + ret = devm_request_irq(&pdev->dev, dspi->irq, dspi_interrupt, 0, + pdev->name, dspi); + if (ret < 0) { + dev_err(&pdev->dev, "Unable to attach DSPI interrupt\n"); + goto out_master_put; + } + + dspi->clk = devm_clk_get(&pdev->dev, "dspi"); + if (IS_ERR(dspi->clk)) { + ret = PTR_ERR(dspi->clk); + dev_err(&pdev->dev, "unable to get clock\n"); + goto out_master_put; + } + clk_prepare_enable(dspi->clk); + + init_waitqueue_head(&dspi->waitq); + platform_set_drvdata(pdev, dspi); + + ret = spi_bitbang_start(&dspi->bitbang); + if (ret != 0) { + dev_err(&pdev->dev, "Problem registering DSPI master\n"); + goto out_clk_put; + } + + pr_info(KERN_INFO "Freescale DSPI master initialized\n"); + return ret; + +out_clk_put: + clk_disable_unprepare(dspi->clk); +out_master_put: + spi_master_put(master); + platform_set_drvdata(pdev, NULL); + + return ret; +} + +static int dspi_remove(struct platform_device *pdev) +{ + struct fsl_dspi *dspi = platform_get_drvdata(pdev); + + /* Disconnect from the SPI framework */ + spi_bitbang_stop(&dspi->bitbang); + spi_master_put(dspi->bitbang.master); + + return 0; +} + +static struct platform_driver fsl_dspi_driver = { + .driver.name = DRIVER_NAME, + .driver.of_match_table = fsl_dspi_dt_ids, + .driver.owner = THIS_MODULE, + .driver.pm = &dspi_pm, + .probe = dspi_probe, + .remove = dspi_remove, +}; +module_platform_driver(fsl_dspi_driver); + +MODULE_DESCRIPTION("Freescale DSPI Controller Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRIVER_NAME); diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c index 6a74d7848d93..b8f1103fe28e 100644 --- a/drivers/spi/spi-fsl-espi.c +++ b/drivers/spi/spi-fsl-espi.c @@ -584,7 +584,7 @@ static void fsl_espi_remove(struct mpc8xxx_spi *mspi) static struct spi_master * fsl_espi_probe(struct device *dev, struct resource *mem, unsigned int irq) { - struct fsl_spi_platform_data *pdata = dev->platform_data; + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); struct spi_master *master; struct mpc8xxx_spi *mpc8xxx_spi; struct fsl_espi_reg *reg_base; @@ -665,7 +665,7 @@ err: static int of_fsl_espi_get_chipselects(struct device *dev) { struct device_node *np = dev->of_node; - struct fsl_spi_platform_data *pdata = dev->platform_data; + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); const u32 *prop; int len; diff --git a/drivers/spi/spi-fsl-lib.c b/drivers/spi/spi-fsl-lib.c index e947f2d1b2f5..0b75f26158ab 100644 --- a/drivers/spi/spi-fsl-lib.c +++ b/drivers/spi/spi-fsl-lib.c @@ -122,7 +122,7 @@ const char *mpc8xxx_spi_strmode(unsigned int flags) int mpc8xxx_spi_probe(struct device *dev, struct resource *mem, unsigned int irq) { - struct fsl_spi_platform_data *pdata = dev->platform_data; + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); struct spi_master *master; struct mpc8xxx_spi *mpc8xxx_spi; int ret = 0; diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c index 41e89c3e3edc..bbc94294891c 100644 --- a/drivers/spi/spi-fsl-spi.c +++ b/drivers/spi/spi-fsl-spi.c @@ -574,7 +574,7 @@ static void fsl_spi_grlib_cs_control(struct spi_device *spi, bool on) static void fsl_spi_grlib_probe(struct device *dev) { - struct fsl_spi_platform_data *pdata = dev->platform_data; + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); struct spi_master *master = dev_get_drvdata(dev); struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(master); struct fsl_spi_reg *reg_base = mpc8xxx_spi->reg_base; @@ -600,7 +600,7 @@ static void fsl_spi_grlib_probe(struct device *dev) static struct spi_master * fsl_spi_probe(struct device *dev, struct resource *mem, unsigned int irq) { - struct fsl_spi_platform_data *pdata = dev->platform_data; + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); struct spi_master *master; struct mpc8xxx_spi *mpc8xxx_spi; struct fsl_spi_reg *reg_base; @@ -700,7 +700,8 @@ err: static void fsl_spi_cs_control(struct spi_device *spi, bool on) { struct device *dev = spi->dev.parent->parent; - struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(dev->platform_data); + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); + struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata); u16 cs = spi->chip_select; int gpio = pinfo->gpios[cs]; bool alow = pinfo->alow_flags[cs]; @@ -711,7 +712,7 @@ static void fsl_spi_cs_control(struct spi_device *spi, bool on) static int of_fsl_spi_get_chipselects(struct device *dev) { struct device_node *np = dev->of_node; - struct fsl_spi_platform_data *pdata = dev->platform_data; + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata); int ngpios; int i = 0; @@ -790,7 +791,7 @@ err_alloc_flags: static int of_fsl_spi_free_chipselects(struct device *dev) { - struct fsl_spi_platform_data *pdata = dev->platform_data; + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata); int i; @@ -889,7 +890,7 @@ static int plat_mpc8xxx_spi_probe(struct platform_device *pdev) int irq; struct spi_master *master; - if (!pdev->dev.platform_data) + if (!dev_get_platdata(&pdev->dev)) return -EINVAL; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c index a54524cf42cc..68b69fec13a9 100644 --- a/drivers/spi/spi-gpio.c +++ b/drivers/spi/spi-gpio.c @@ -420,7 +420,7 @@ static int spi_gpio_probe(struct platform_device *pdev) if (status > 0) use_of = 1; - pdata = pdev->dev.platform_data; + pdata = dev_get_platdata(&pdev->dev); #ifdef GENERIC_BITBANG if (!pdata || !pdata->num_chipselect) return -ENODEV; @@ -506,7 +506,7 @@ static int spi_gpio_remove(struct platform_device *pdev) int status; spi_gpio = platform_get_drvdata(pdev); - pdata = pdev->dev.platform_data; + pdata = dev_get_platdata(&pdev->dev); /* stop() unregisters child devices too */ status = spi_bitbang_stop(&spi_gpio->bitbang); diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 7db4f43ee4d8..15323d8bd9cf 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -619,6 +619,7 @@ static const struct of_device_id spi_imx_dt_ids[] = { { .compatible = "fsl,imx51-ecspi", .data = &imx51_ecspi_devtype_data, }, { /* sentinel */ } }; +MODULE_DEVICE_TABLE(of, spi_imx_dt_ids); static void spi_imx_chipselect(struct spi_device *spi, int is_active) { @@ -796,10 +797,11 @@ static int spi_imx_probe(struct platform_device *pdev) if (!gpio_is_valid(cs_gpio)) continue; - ret = gpio_request(spi_imx->chipselect[i], DRIVER_NAME); + ret = devm_gpio_request(&pdev->dev, spi_imx->chipselect[i], + DRIVER_NAME); if (ret) { dev_err(&pdev->dev, "can't get cs gpios\n"); - goto out_gpio_free; + goto out_master_put; } } @@ -816,50 +818,44 @@ static int spi_imx_probe(struct platform_device *pdev) (struct spi_imx_devtype_data *) pdev->id_entry->driver_data; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "can't get platform resource\n"); - ret = -ENOMEM; - goto out_gpio_free; - } - - if (!request_mem_region(res->start, resource_size(res), pdev->name)) { - dev_err(&pdev->dev, "request_mem_region failed\n"); - ret = -EBUSY; - goto out_gpio_free; - } - - spi_imx->base = ioremap(res->start, resource_size(res)); - if (!spi_imx->base) { - ret = -EINVAL; - goto out_release_mem; + spi_imx->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(spi_imx->base)) { + ret = PTR_ERR(spi_imx->base); + goto out_master_put; } spi_imx->irq = platform_get_irq(pdev, 0); if (spi_imx->irq < 0) { ret = -EINVAL; - goto out_iounmap; + goto out_master_put; } - ret = request_irq(spi_imx->irq, spi_imx_isr, 0, DRIVER_NAME, spi_imx); + ret = devm_request_irq(&pdev->dev, spi_imx->irq, spi_imx_isr, 0, + DRIVER_NAME, spi_imx); if (ret) { dev_err(&pdev->dev, "can't get irq%d: %d\n", spi_imx->irq, ret); - goto out_iounmap; + goto out_master_put; } spi_imx->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); if (IS_ERR(spi_imx->clk_ipg)) { ret = PTR_ERR(spi_imx->clk_ipg); - goto out_free_irq; + goto out_master_put; } spi_imx->clk_per = devm_clk_get(&pdev->dev, "per"); if (IS_ERR(spi_imx->clk_per)) { ret = PTR_ERR(spi_imx->clk_per); - goto out_free_irq; + goto out_master_put; } - clk_prepare_enable(spi_imx->clk_per); - clk_prepare_enable(spi_imx->clk_ipg); + ret = clk_prepare_enable(spi_imx->clk_per); + if (ret) + goto out_master_put; + + ret = clk_prepare_enable(spi_imx->clk_ipg); + if (ret) + goto out_put_per; spi_imx->spi_clk = clk_get_rate(spi_imx->clk_per); @@ -879,47 +875,27 @@ static int spi_imx_probe(struct platform_device *pdev) return ret; out_clk_put: - clk_disable_unprepare(spi_imx->clk_per); clk_disable_unprepare(spi_imx->clk_ipg); -out_free_irq: - free_irq(spi_imx->irq, spi_imx); -out_iounmap: - iounmap(spi_imx->base); -out_release_mem: - release_mem_region(res->start, resource_size(res)); -out_gpio_free: - while (--i >= 0) { - if (gpio_is_valid(spi_imx->chipselect[i])) - gpio_free(spi_imx->chipselect[i]); - } +out_put_per: + clk_disable_unprepare(spi_imx->clk_per); +out_master_put: spi_master_put(master); - kfree(master); + return ret; } static int spi_imx_remove(struct platform_device *pdev) { struct spi_master *master = platform_get_drvdata(pdev); - struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); struct spi_imx_data *spi_imx = spi_master_get_devdata(master); - int i; spi_bitbang_stop(&spi_imx->bitbang); writel(0, spi_imx->base + MXC_CSPICTRL); - clk_disable_unprepare(spi_imx->clk_per); clk_disable_unprepare(spi_imx->clk_ipg); - free_irq(spi_imx->irq, spi_imx); - iounmap(spi_imx->base); - - for (i = 0; i < master->num_chipselect; i++) - if (gpio_is_valid(spi_imx->chipselect[i])) - gpio_free(spi_imx->chipselect[i]); - + clk_disable_unprepare(spi_imx->clk_per); spi_master_put(master); - release_mem_region(res->start, resource_size(res)); - return 0; } diff --git a/drivers/spi/spi-mpc512x-psc.c b/drivers/spi/spi-mpc512x-psc.c index 29fce6af5145..dbc5e999a1f5 100644 --- a/drivers/spi/spi-mpc512x-psc.c +++ b/drivers/spi/spi-mpc512x-psc.c @@ -38,7 +38,8 @@ struct mpc512x_psc_spi { struct mpc512x_psc_fifo __iomem *fifo; unsigned int irq; u8 bits_per_word; - u32 mclk; + struct clk *clk_mclk; + u32 mclk_rate; struct completion txisrdone; }; @@ -72,6 +73,7 @@ static void mpc512x_psc_spi_activate_cs(struct spi_device *spi) struct mpc52xx_psc __iomem *psc = mps->psc; u32 sicr; u32 ccr; + int speed; u16 bclkdiv; sicr = in_be32(&psc->sicr); @@ -95,10 +97,10 @@ static void mpc512x_psc_spi_activate_cs(struct spi_device *spi) ccr = in_be32(&psc->ccr); ccr &= 0xFF000000; - if (cs->speed_hz) - bclkdiv = (mps->mclk / cs->speed_hz) - 1; - else - bclkdiv = (mps->mclk / 1000000) - 1; /* default 1MHz */ + speed = cs->speed_hz; + if (!speed) + speed = 1000000; /* default 1MHz */ + bclkdiv = (mps->mclk_rate / speed) - 1; ccr |= (((bclkdiv & 0xff) << 16) | (((bclkdiv >> 8) & 0xff) << 8)); out_be32(&psc->ccr, ccr); @@ -386,19 +388,11 @@ static int mpc512x_psc_spi_port_config(struct spi_master *master, { struct mpc52xx_psc __iomem *psc = mps->psc; struct mpc512x_psc_fifo __iomem *fifo = mps->fifo; - struct clk *spiclk; - int ret = 0; - char name[32]; u32 sicr; u32 ccr; + int speed; u16 bclkdiv; - sprintf(name, "psc%d_mclk", master->bus_num); - spiclk = clk_get(&master->dev, name); - clk_enable(spiclk); - mps->mclk = clk_get_rate(spiclk); - clk_put(spiclk); - /* Reset the PSC into a known state */ out_8(&psc->command, MPC52xx_PSC_RST_RX); out_8(&psc->command, MPC52xx_PSC_RST_TX); @@ -425,7 +419,8 @@ static int mpc512x_psc_spi_port_config(struct spi_master *master, ccr = in_be32(&psc->ccr); ccr &= 0xFF000000; - bclkdiv = (mps->mclk / 1000000) - 1; /* default 1MHz */ + speed = 1000000; /* default 1MHz */ + bclkdiv = (mps->mclk_rate / speed) - 1; ccr |= (((bclkdiv & 0xff) << 16) | (((bclkdiv >> 8) & 0xff) << 8)); out_be32(&psc->ccr, ccr); @@ -445,7 +440,7 @@ static int mpc512x_psc_spi_port_config(struct spi_master *master, mps->bits_per_word = 8; - return ret; + return 0; } static irqreturn_t mpc512x_psc_spi_isr(int irq, void *dev_id) @@ -474,11 +469,14 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr, u32 size, unsigned int irq, s16 bus_num) { - struct fsl_spi_platform_data *pdata = dev->platform_data; + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); struct mpc512x_psc_spi *mps; struct spi_master *master; int ret; void *tempp; + int psc_num; + char clk_name[16]; + struct clk *clk; master = spi_alloc_master(dev, sizeof *mps); if (master == NULL) @@ -521,16 +519,29 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr, goto free_master; init_completion(&mps->txisrdone); + psc_num = master->bus_num; + snprintf(clk_name, sizeof(clk_name), "psc%d_mclk", psc_num); + clk = devm_clk_get(dev, clk_name); + if (IS_ERR(clk)) + goto free_irq; + ret = clk_prepare_enable(clk); + if (ret) + goto free_irq; + mps->clk_mclk = clk; + mps->mclk_rate = clk_get_rate(clk); + ret = mpc512x_psc_spi_port_config(master, mps); if (ret < 0) - goto free_irq; + goto free_clock; ret = spi_register_master(master); if (ret < 0) - goto free_irq; + goto free_clock; return ret; +free_clock: + clk_disable_unprepare(mps->clk_mclk); free_irq: free_irq(mps->irq, mps); free_master: @@ -547,6 +558,7 @@ static int mpc512x_psc_spi_do_remove(struct device *dev) struct mpc512x_psc_spi *mps = spi_master_get_devdata(master); spi_unregister_master(master); + clk_disable_unprepare(mps->clk_mclk); free_irq(mps->irq, mps); if (mps->psc) iounmap(mps->psc); diff --git a/drivers/spi/spi-mpc52xx-psc.c b/drivers/spi/spi-mpc52xx-psc.c index fed0571d4dec..6e925dc34396 100644 --- a/drivers/spi/spi-mpc52xx-psc.c +++ b/drivers/spi/spi-mpc52xx-psc.c @@ -366,7 +366,7 @@ static irqreturn_t mpc52xx_psc_spi_isr(int irq, void *dev_id) static int mpc52xx_psc_spi_do_probe(struct device *dev, u32 regaddr, u32 size, unsigned int irq, s16 bus_num) { - struct fsl_spi_platform_data *pdata = dev->platform_data; + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); struct mpc52xx_psc_spi *mps; struct spi_master *master; int ret; diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c index 424d38e59421..de7b1141b90f 100644 --- a/drivers/spi/spi-mxs.c +++ b/drivers/spi/spi-mxs.c @@ -67,13 +67,8 @@ static int mxs_spi_setup_transfer(struct spi_device *dev, { struct mxs_spi *spi = spi_master_get_devdata(dev->master); struct mxs_ssp *ssp = &spi->ssp; - uint8_t bits_per_word; uint32_t hz = 0; - bits_per_word = dev->bits_per_word; - if (t && t->bits_per_word) - bits_per_word = t->bits_per_word; - hz = dev->max_speed_hz; if (t && t->speed_hz) hz = min(hz, t->speed_hz); @@ -513,7 +508,7 @@ static int mxs_spi_probe(struct platform_device *pdev) iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq_err = platform_get_irq(pdev, 0); - if (!iores || irq_err < 0) + if (irq_err < 0) return -EINVAL; base = devm_ioremap_resource(&pdev->dev, iores); @@ -563,25 +558,31 @@ static int mxs_spi_probe(struct platform_device *pdev) goto out_master_free; } - clk_prepare_enable(ssp->clk); + ret = clk_prepare_enable(ssp->clk); + if (ret) + goto out_dma_release; + clk_set_rate(ssp->clk, clk_freq); ssp->clk_rate = clk_get_rate(ssp->clk) / 1000; - stmp_reset_block(ssp->base); + ret = stmp_reset_block(ssp->base); + if (ret) + goto out_disable_clk; platform_set_drvdata(pdev, master); ret = spi_register_master(master); if (ret) { dev_err(&pdev->dev, "Cannot register SPI master, %d\n", ret); - goto out_free_dma; + goto out_disable_clk; } return 0; -out_free_dma: - dma_release_channel(ssp->dmach); +out_disable_clk: clk_disable_unprepare(ssp->clk); +out_dma_release: + dma_release_channel(ssp->dmach); out_master_free: spi_master_put(master); return ret; @@ -598,11 +599,8 @@ static int mxs_spi_remove(struct platform_device *pdev) ssp = &spi->ssp; spi_unregister_master(master); - - dma_release_channel(ssp->dmach); - clk_disable_unprepare(ssp->clk); - + dma_release_channel(ssp->dmach); spi_master_put(master); return 0; diff --git a/drivers/spi/spi-nuc900.c b/drivers/spi/spi-nuc900.c index 150d85453c27..47a68b43bcd5 100644 --- a/drivers/spi/spi-nuc900.c +++ b/drivers/spi/spi-nuc900.c @@ -174,17 +174,6 @@ static void nuc900_spi_gobusy(struct nuc900_spi *hw) spin_unlock_irqrestore(&hw->lock, flags); } -static int nuc900_spi_setupxfer(struct spi_device *spi, - struct spi_transfer *t) -{ - return 0; -} - -static int nuc900_spi_setup(struct spi_device *spi) -{ - return 0; -} - static inline unsigned int hw_txbyte(struct nuc900_spi *hw, int count) { return hw->tx ? hw->tx[count] : 0; @@ -361,7 +350,7 @@ static int nuc900_spi_probe(struct platform_device *pdev) hw = spi_master_get_devdata(master); hw->master = spi_master_get(master); - hw->pdata = pdev->dev.platform_data; + hw->pdata = dev_get_platdata(&pdev->dev); hw->dev = &pdev->dev; if (hw->pdata == NULL) { @@ -373,14 +362,12 @@ static int nuc900_spi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, hw); init_completion(&hw->done); - master->mode_bits = SPI_MODE_0; + master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; master->num_chipselect = hw->pdata->num_cs; master->bus_num = hw->pdata->bus_num; hw->bitbang.master = hw->master; - hw->bitbang.setup_transfer = nuc900_spi_setupxfer; hw->bitbang.chipselect = nuc900_spi_chipsel; hw->bitbang.txrx_bufs = nuc900_spi_txrx; - hw->bitbang.master->setup = nuc900_spi_setup; hw->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (hw->res == NULL) { diff --git a/drivers/spi/spi-oc-tiny.c b/drivers/spi/spi-oc-tiny.c index 58deb79d046b..333cb1badcd7 100644 --- a/drivers/spi/spi-oc-tiny.c +++ b/drivers/spi/spi-oc-tiny.c @@ -285,7 +285,7 @@ static int tiny_spi_of_probe(struct platform_device *pdev) static int tiny_spi_probe(struct platform_device *pdev) { - struct tiny_spi_platform_data *platp = pdev->dev.platform_data; + struct tiny_spi_platform_data *platp = dev_get_platdata(&pdev->dev); struct tiny_spi *hw; struct spi_master *master; struct resource *res; @@ -315,15 +315,11 @@ static int tiny_spi_probe(struct platform_device *pdev) /* find and map our resources */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - goto exit_busy; - if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res), - pdev->name)) - goto exit_busy; - hw->base = devm_ioremap_nocache(&pdev->dev, res->start, - resource_size(res)); - if (!hw->base) - goto exit_busy; + hw->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(hw->base)) { + err = PTR_ERR(hw->base); + goto exit; + } /* irq is optional */ hw->irq = platform_get_irq(pdev, 0); if (hw->irq >= 0) { @@ -337,8 +333,10 @@ static int tiny_spi_probe(struct platform_device *pdev) if (platp) { hw->gpio_cs_count = platp->gpio_cs_count; hw->gpio_cs = platp->gpio_cs; - if (platp->gpio_cs_count && !platp->gpio_cs) - goto exit_busy; + if (platp->gpio_cs_count && !platp->gpio_cs) { + err = -EBUSY; + goto exit; + } hw->freq = platp->freq; hw->baudwidth = platp->baudwidth; } else { @@ -365,8 +363,6 @@ static int tiny_spi_probe(struct platform_device *pdev) exit_gpio: while (i-- > 0) gpio_free(hw->gpio_cs[i]); -exit_busy: - err = -EBUSY; exit: spi_master_put(master); return err; diff --git a/drivers/spi/spi-octeon.c b/drivers/spi/spi-octeon.c index 24daf964a409..5f28ddbe4f7e 100644 --- a/drivers/spi/spi-octeon.c +++ b/drivers/spi/spi-octeon.c @@ -28,7 +28,6 @@ #define OCTEON_SPI_MAX_CLOCK_HZ 16000000 struct octeon_spi { - struct spi_master *my_master; u64 register_base; u64 last_cfg; u64 cs_enax; @@ -64,7 +63,6 @@ static int octeon_spi_do_transfer(struct octeon_spi *p, unsigned int speed_hz; int mode; bool cpha, cpol; - int bits_per_word; const u8 *tx_buf; u8 *rx_buf; int len; @@ -76,12 +74,9 @@ static int octeon_spi_do_transfer(struct octeon_spi *p, mode = msg_setup->mode; cpha = mode & SPI_CPHA; cpol = mode & SPI_CPOL; - bits_per_word = msg_setup->bits_per_word; if (xfer->speed_hz) speed_hz = xfer->speed_hz; - if (xfer->bits_per_word) - bits_per_word = xfer->bits_per_word; if (speed_hz > OCTEON_SPI_MAX_CLOCK_HZ) speed_hz = OCTEON_SPI_MAX_CLOCK_HZ; @@ -166,19 +161,6 @@ static int octeon_spi_do_transfer(struct octeon_spi *p, return xfer->len; } -static int octeon_spi_validate_bpw(struct spi_device *spi, u32 speed) -{ - switch (speed) { - case 8: - break; - default: - dev_err(&spi->dev, "Error: %d bits per word not supported\n", - speed); - return -EINVAL; - } - return 0; -} - static int octeon_spi_transfer_one_message(struct spi_master *master, struct spi_message *msg) { @@ -197,15 +179,6 @@ static int octeon_spi_transfer_one_message(struct spi_master *master, } list_for_each_entry(xfer, &msg->transfers, transfer_list) { - if (xfer->bits_per_word) { - status = octeon_spi_validate_bpw(msg->spi, - xfer->bits_per_word); - if (status) - goto err; - } - } - - list_for_each_entry(xfer, &msg->transfers, transfer_list) { bool last_xfer = &xfer->transfer_list == msg->transfers.prev; int r = octeon_spi_do_transfer(p, msg, xfer, last_xfer); if (r < 0) { @@ -236,14 +209,9 @@ static struct octeon_spi_setup *octeon_spi_new_setup(struct spi_device *spi) static int octeon_spi_setup(struct spi_device *spi) { - int r; struct octeon_spi_setup *new_setup; struct octeon_spi_setup *old_setup = spi_get_ctldata(spi); - r = octeon_spi_validate_bpw(spi, spi->bits_per_word); - if (r) - return r; - new_setup = octeon_spi_new_setup(spi); if (!new_setup) return -ENOMEM; @@ -261,14 +229,8 @@ static void octeon_spi_cleanup(struct spi_device *spi) kfree(old_setup); } -static int octeon_spi_nop_transfer_hardware(struct spi_master *master) -{ - return 0; -} - static int octeon_spi_probe(struct platform_device *pdev) { - struct resource *res_mem; struct spi_master *master; struct octeon_spi *p; @@ -278,8 +240,7 @@ static int octeon_spi_probe(struct platform_device *pdev) if (!master) return -ENOMEM; p = spi_master_get_devdata(master); - platform_set_drvdata(pdev, p); - p->my_master = master; + platform_set_drvdata(pdev, master); res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -307,9 +268,8 @@ static int octeon_spi_probe(struct platform_device *pdev) master->setup = octeon_spi_setup; master->cleanup = octeon_spi_cleanup; - master->prepare_transfer_hardware = octeon_spi_nop_transfer_hardware; master->transfer_one_message = octeon_spi_transfer_one_message; - master->unprepare_transfer_hardware = octeon_spi_nop_transfer_hardware; + master->bits_per_word_mask = SPI_BPW_MASK(8); master->dev.of_node = pdev->dev.of_node; err = spi_register_master(master); @@ -328,10 +288,11 @@ fail: static int octeon_spi_remove(struct platform_device *pdev) { - struct octeon_spi *p = platform_get_drvdata(pdev); + struct spi_master *master = platform_get_drvdata(pdev); + struct octeon_spi *p = spi_master_get_devdata(master); u64 register_base = p->register_base; - spi_unregister_master(p->my_master); + spi_unregister_master(master); /* Clear the CSENA* and put everything in a known state. */ cvmx_write_csr(register_base + OCTEON_SPI_CFG, 0); diff --git a/drivers/spi/spi-omap-100k.c b/drivers/spi/spi-omap-100k.c index ee25670f8cfd..69ecf05757dd 100644 --- a/drivers/spi/spi-omap-100k.c +++ b/drivers/spi/spi-omap-100k.c @@ -83,11 +83,6 @@ #define SPI_SHUTDOWN 1 struct omap1_spi100k { - struct work_struct work; - - /* lock protects queue and registers */ - spinlock_t lock; - struct list_head msg_queue; struct spi_master *master; struct clk *ick; struct clk *fck; @@ -104,8 +99,6 @@ struct omap1_spi100k_cs { int word_len; }; -static struct workqueue_struct *omap1_spi100k_wq; - #define MOD_REG_BIT(val, mask, set) do { \ if (set) \ val |= mask; \ @@ -310,170 +303,102 @@ static int omap1_spi100k_setup(struct spi_device *spi) spi100k_open(spi->master); - clk_enable(spi100k->ick); - clk_enable(spi100k->fck); + clk_prepare_enable(spi100k->ick); + clk_prepare_enable(spi100k->fck); ret = omap1_spi100k_setup_transfer(spi, NULL); - clk_disable(spi100k->ick); - clk_disable(spi100k->fck); + clk_disable_unprepare(spi100k->ick); + clk_disable_unprepare(spi100k->fck); return ret; } -static void omap1_spi100k_work(struct work_struct *work) +static int omap1_spi100k_prepare_hardware(struct spi_master *master) { - struct omap1_spi100k *spi100k; - int status = 0; + struct omap1_spi100k *spi100k = spi_master_get_devdata(master); - spi100k = container_of(work, struct omap1_spi100k, work); - spin_lock_irq(&spi100k->lock); + clk_prepare_enable(spi100k->ick); + clk_prepare_enable(spi100k->fck); - clk_enable(spi100k->ick); - clk_enable(spi100k->fck); + return 0; +} - /* We only enable one channel at a time -- the one whose message is - * at the head of the queue -- although this controller would gladly - * arbitrate among multiple channels. This corresponds to "single - * channel" master mode. As a side effect, we need to manage the - * chipselect with the FORCE bit ... CS != channel enable. - */ - while (!list_empty(&spi100k->msg_queue)) { - struct spi_message *m; - struct spi_device *spi; - struct spi_transfer *t = NULL; - int cs_active = 0; - struct omap1_spi100k_cs *cs; - int par_override = 0; - - m = container_of(spi100k->msg_queue.next, struct spi_message, - queue); - - list_del_init(&m->queue); - spin_unlock_irq(&spi100k->lock); - - spi = m->spi; - cs = spi->controller_state; - - list_for_each_entry(t, &m->transfers, transfer_list) { - if (t->tx_buf == NULL && t->rx_buf == NULL && t->len) { - status = -EINVAL; +static int omap1_spi100k_transfer_one_message(struct spi_master *master, + struct spi_message *m) +{ + struct omap1_spi100k *spi100k = spi_master_get_devdata(master); + struct spi_device *spi = m->spi; + struct spi_transfer *t = NULL; + int cs_active = 0; + int par_override = 0; + int status = 0; + + list_for_each_entry(t, &m->transfers, transfer_list) { + if (t->tx_buf == NULL && t->rx_buf == NULL && t->len) { + status = -EINVAL; + break; + } + if (par_override || t->speed_hz || t->bits_per_word) { + par_override = 1; + status = omap1_spi100k_setup_transfer(spi, t); + if (status < 0) break; - } - if (par_override || t->speed_hz || t->bits_per_word) { - par_override = 1; - status = omap1_spi100k_setup_transfer(spi, t); - if (status < 0) - break; - if (!t->speed_hz && !t->bits_per_word) - par_override = 0; - } + if (!t->speed_hz && !t->bits_per_word) + par_override = 0; + } - if (!cs_active) { - omap1_spi100k_force_cs(spi100k, 1); - cs_active = 1; - } + if (!cs_active) { + omap1_spi100k_force_cs(spi100k, 1); + cs_active = 1; + } - if (t->len) { - unsigned count; + if (t->len) { + unsigned count; - count = omap1_spi100k_txrx_pio(spi, t); - m->actual_length += count; + count = omap1_spi100k_txrx_pio(spi, t); + m->actual_length += count; - if (count != t->len) { - status = -EIO; - break; - } + if (count != t->len) { + status = -EIO; + break; } + } - if (t->delay_usecs) - udelay(t->delay_usecs); + if (t->delay_usecs) + udelay(t->delay_usecs); - /* ignore the "leave it on after last xfer" hint */ + /* ignore the "leave it on after last xfer" hint */ - if (t->cs_change) { - omap1_spi100k_force_cs(spi100k, 0); - cs_active = 0; - } - } - - /* Restore defaults if they were overriden */ - if (par_override) { - par_override = 0; - status = omap1_spi100k_setup_transfer(spi, NULL); + if (t->cs_change) { + omap1_spi100k_force_cs(spi100k, 0); + cs_active = 0; } + } - if (cs_active) - omap1_spi100k_force_cs(spi100k, 0); + /* Restore defaults if they were overriden */ + if (par_override) { + par_override = 0; + status = omap1_spi100k_setup_transfer(spi, NULL); + } - m->status = status; - m->complete(m->context); + if (cs_active) + omap1_spi100k_force_cs(spi100k, 0); - spin_lock_irq(&spi100k->lock); - } + m->status = status; - clk_disable(spi100k->ick); - clk_disable(spi100k->fck); - spin_unlock_irq(&spi100k->lock); + spi_finalize_current_message(master); - if (status < 0) - printk(KERN_WARNING "spi transfer failed with %d\n", status); + return status; } -static int omap1_spi100k_transfer(struct spi_device *spi, struct spi_message *m) +static int omap1_spi100k_unprepare_hardware(struct spi_master *master) { - struct omap1_spi100k *spi100k; - unsigned long flags; - struct spi_transfer *t; - - m->actual_length = 0; - m->status = -EINPROGRESS; - - spi100k = spi_master_get_devdata(spi->master); - - /* Don't accept new work if we're shutting down */ - if (spi100k->state == SPI_SHUTDOWN) - return -ESHUTDOWN; - - /* reject invalid messages and transfers */ - if (list_empty(&m->transfers) || !m->complete) - return -EINVAL; - - list_for_each_entry(t, &m->transfers, transfer_list) { - const void *tx_buf = t->tx_buf; - void *rx_buf = t->rx_buf; - unsigned len = t->len; - - if (t->speed_hz > OMAP1_SPI100K_MAX_FREQ - || (len && !(rx_buf || tx_buf))) { - dev_dbg(&spi->dev, "transfer: %d Hz, %d %s%s, %d bpw\n", - t->speed_hz, - len, - tx_buf ? "tx" : "", - rx_buf ? "rx" : "", - t->bits_per_word); - return -EINVAL; - } - - if (t->speed_hz && t->speed_hz < OMAP1_SPI100K_MAX_FREQ/(1<<16)) { - dev_dbg(&spi->dev, "%d Hz max exceeds %d\n", - t->speed_hz, - OMAP1_SPI100K_MAX_FREQ/(1<<16)); - return -EINVAL; - } - - } - - spin_lock_irqsave(&spi100k->lock, flags); - list_add_tail(&m->queue, &spi100k->msg_queue); - queue_work(omap1_spi100k_wq, &spi100k->work); - spin_unlock_irqrestore(&spi100k->lock, flags); + struct omap1_spi100k *spi100k = spi_master_get_devdata(master); - return 0; -} + clk_disable_unprepare(spi100k->ick); + clk_disable_unprepare(spi100k->fck); -static int omap1_spi100k_reset(struct omap1_spi100k *spi100k) -{ return 0; } @@ -496,11 +421,15 @@ static int omap1_spi100k_probe(struct platform_device *pdev) master->bus_num = pdev->id; master->setup = omap1_spi100k_setup; - master->transfer = omap1_spi100k_transfer; + master->transfer_one_message = omap1_spi100k_transfer_one_message; + master->prepare_transfer_hardware = omap1_spi100k_prepare_hardware; + master->unprepare_transfer_hardware = omap1_spi100k_unprepare_hardware; master->cleanup = NULL; master->num_chipselect = 2; master->mode_bits = MODEBITS; master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32); + master->min_speed_hz = OMAP1_SPI100K_MAX_FREQ/(1<<16); + master->max_speed_hz = OMAP1_SPI100K_MAX_FREQ; platform_set_drvdata(pdev, master); @@ -512,42 +441,31 @@ static int omap1_spi100k_probe(struct platform_device *pdev) * You should allocate this with ioremap() before initializing * the SPI. */ - spi100k->base = (void __iomem *) pdev->dev.platform_data; - - INIT_WORK(&spi100k->work, omap1_spi100k_work); + spi100k->base = (void __iomem *)dev_get_platdata(&pdev->dev); - spin_lock_init(&spi100k->lock); - INIT_LIST_HEAD(&spi100k->msg_queue); - spi100k->ick = clk_get(&pdev->dev, "ick"); + spi100k->ick = devm_clk_get(&pdev->dev, "ick"); if (IS_ERR(spi100k->ick)) { dev_dbg(&pdev->dev, "can't get spi100k_ick\n"); status = PTR_ERR(spi100k->ick); - goto err1; + goto err; } - spi100k->fck = clk_get(&pdev->dev, "fck"); + spi100k->fck = devm_clk_get(&pdev->dev, "fck"); if (IS_ERR(spi100k->fck)) { dev_dbg(&pdev->dev, "can't get spi100k_fck\n"); status = PTR_ERR(spi100k->fck); - goto err2; + goto err; } - if (omap1_spi100k_reset(spi100k) < 0) - goto err3; - status = spi_register_master(master); if (status < 0) - goto err3; + goto err; spi100k->state = SPI_RUNNING; return status; -err3: - clk_put(spi100k->fck); -err2: - clk_put(spi100k->ick); -err1: +err: spi_master_put(master); return status; } @@ -557,33 +475,14 @@ static int omap1_spi100k_remove(struct platform_device *pdev) struct spi_master *master; struct omap1_spi100k *spi100k; struct resource *r; - unsigned limit = 500; - unsigned long flags; int status = 0; master = platform_get_drvdata(pdev); spi100k = spi_master_get_devdata(master); - spin_lock_irqsave(&spi100k->lock, flags); - - spi100k->state = SPI_SHUTDOWN; - while (!list_empty(&spi100k->msg_queue) && limit--) { - spin_unlock_irqrestore(&spi100k->lock, flags); - msleep(10); - spin_lock_irqsave(&spi100k->lock, flags); - } - - if (!list_empty(&spi100k->msg_queue)) - status = -EBUSY; - - spin_unlock_irqrestore(&spi100k->lock, flags); - if (status != 0) return status; - clk_put(spi100k->fck); - clk_put(spi100k->ick); - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); spi_unregister_master(master); @@ -596,30 +495,11 @@ static struct platform_driver omap1_spi100k_driver = { .name = "omap1_spi100k", .owner = THIS_MODULE, }, + .probe = omap1_spi100k_probe, .remove = omap1_spi100k_remove, }; - -static int __init omap1_spi100k_init(void) -{ - omap1_spi100k_wq = create_singlethread_workqueue( - omap1_spi100k_driver.driver.name); - - if (omap1_spi100k_wq == NULL) - return -1; - - return platform_driver_probe(&omap1_spi100k_driver, omap1_spi100k_probe); -} - -static void __exit omap1_spi100k_exit(void) -{ - platform_driver_unregister(&omap1_spi100k_driver); - - destroy_workqueue(omap1_spi100k_wq); -} - -module_init(omap1_spi100k_init); -module_exit(omap1_spi100k_exit); +module_platform_driver(omap1_spi100k_driver); MODULE_DESCRIPTION("OMAP7xx SPI 100k controller driver"); MODULE_AUTHOR("Fabrice Crohas <fcrohas@gmail.com>"); diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 5994039758de..ed4af4708d9a 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -335,23 +335,6 @@ static void omap2_mcspi_restore_ctx(struct omap2_mcspi *mcspi) __raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0); } -static int omap2_prepare_transfer(struct spi_master *master) -{ - struct omap2_mcspi *mcspi = spi_master_get_devdata(master); - - pm_runtime_get_sync(mcspi->dev); - return 0; -} - -static int omap2_unprepare_transfer(struct spi_master *master) -{ - struct omap2_mcspi *mcspi = spi_master_get_devdata(master); - - pm_runtime_mark_last_busy(mcspi->dev); - pm_runtime_put_autosuspend(mcspi->dev); - return 0; -} - static int mcspi_wait_for_reg_bit(void __iomem *reg, unsigned long bit) { unsigned long timeout; @@ -1318,8 +1301,7 @@ static int omap2_mcspi_probe(struct platform_device *pdev) master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32); master->setup = omap2_mcspi_setup; - master->prepare_transfer_hardware = omap2_prepare_transfer; - master->unprepare_transfer_hardware = omap2_unprepare_transfer; + master->auto_runtime_pm = true; master->transfer_one_message = omap2_mcspi_transfer_one_message; master->cleanup = omap2_mcspi_cleanup; master->dev.of_node = node; @@ -1340,7 +1322,7 @@ static int omap2_mcspi_probe(struct platform_device *pdev) if (of_get_property(node, "ti,pindir-d0-out-d1-in", NULL)) mcspi->pin_dir = MCSPI_PINDIR_D0_OUT_D1_IN; } else { - pdata = pdev->dev.platform_data; + pdata = dev_get_platdata(&pdev->dev); master->num_chipselect = pdata->num_cs; if (pdev->id != -1) master->bus_num = pdev->id; diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c index 5d90bebaa0fa..1d1d321d90c4 100644 --- a/drivers/spi/spi-orion.c +++ b/drivers/spi/spi-orion.c @@ -19,6 +19,7 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/clk.h> +#include <linux/sizes.h> #include <asm/unaligned.h> #define DRIVER_NAME "orion_spi" @@ -446,30 +447,22 @@ static int orion_spi_probe(struct platform_device *pdev) spi->min_speed = DIV_ROUND_UP(tclk_hz, 30); r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (r == NULL) { - status = -ENODEV; + spi->base = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(spi->base)) { + status = PTR_ERR(spi->base); goto out_rel_clk; } - if (!request_mem_region(r->start, resource_size(r), - dev_name(&pdev->dev))) { - status = -EBUSY; - goto out_rel_clk; - } - spi->base = ioremap(r->start, SZ_1K); - if (orion_spi_reset(spi) < 0) - goto out_rel_mem; + goto out_rel_clk; master->dev.of_node = pdev->dev.of_node; status = spi_register_master(master); if (status < 0) - goto out_rel_mem; + goto out_rel_clk; return status; -out_rel_mem: - release_mem_region(r->start, resource_size(r)); out_rel_clk: clk_disable_unprepare(spi->clk); clk_put(spi->clk); @@ -482,7 +475,6 @@ out: static int orion_spi_remove(struct platform_device *pdev) { struct spi_master *master; - struct resource *r; struct orion_spi *spi; master = platform_get_drvdata(pdev); @@ -491,9 +483,6 @@ static int orion_spi_remove(struct platform_device *pdev) clk_disable_unprepare(spi->clk); clk_put(spi->clk); - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(r->start, resource_size(r)); - spi_unregister_master(master); return 0; diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c index abef061fb84a..9c511a954d21 100644 --- a/drivers/spi/spi-pl022.c +++ b/drivers/spi/spi-pl022.c @@ -1555,18 +1555,6 @@ static int pl022_transfer_one_message(struct spi_master *master, return 0; } -static int pl022_prepare_transfer_hardware(struct spi_master *master) -{ - struct pl022 *pl022 = spi_master_get_devdata(master); - - /* - * Just make sure we have all we need to run the transfer by syncing - * with the runtime PM framework. - */ - pm_runtime_get_sync(&pl022->adev->dev); - return 0; -} - static int pl022_unprepare_transfer_hardware(struct spi_master *master) { struct pl022 *pl022 = spi_master_get_devdata(master); @@ -1575,13 +1563,6 @@ static int pl022_unprepare_transfer_hardware(struct spi_master *master) writew((readw(SSP_CR1(pl022->virtbase)) & (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); - if (pl022->master_info->autosuspend_delay > 0) { - pm_runtime_mark_last_busy(&pl022->adev->dev); - pm_runtime_put_autosuspend(&pl022->adev->dev); - } else { - pm_runtime_put(&pl022->adev->dev); - } - return 0; } @@ -2091,7 +2072,8 @@ pl022_platform_data_dt_get(struct device *dev) static int pl022_probe(struct amba_device *adev, const struct amba_id *id) { struct device *dev = &adev->dev; - struct pl022_ssp_controller *platform_info = adev->dev.platform_data; + struct pl022_ssp_controller *platform_info = + dev_get_platdata(&adev->dev); struct spi_master *master; struct pl022 *pl022 = NULL; /*Data for this driver */ struct device_node *np = adev->dev.of_node; @@ -2139,7 +2121,7 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id) master->num_chipselect = num_cs; master->cleanup = pl022_cleanup; master->setup = pl022_setup; - master->prepare_transfer_hardware = pl022_prepare_transfer_hardware; + master->auto_runtime_pm = true; master->transfer_one_message = pl022_transfer_one_message; master->unprepare_transfer_hardware = pl022_unprepare_transfer_hardware; master->rt = platform_info->rt; @@ -2193,8 +2175,8 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id) status = -ENOMEM; goto err_no_ioremap; } - printk(KERN_INFO "pl022: mapped registers from 0x%08x to %p\n", - adev->res.start, pl022->virtbase); + printk(KERN_INFO "pl022: mapped registers from %pa to %p\n", + &adev->res.start, pl022->virtbase); pl022->clk = devm_clk_get(&adev->dev, NULL); if (IS_ERR(pl022->clk)) { diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index f440dcee852b..2eb06ee0b326 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -69,6 +69,8 @@ MODULE_ALIAS("platform:pxa2xx-spi"); #define LPSS_TX_HITHRESH_DFLT 224 /* Offset from drv_data->lpss_base */ +#define GENERAL_REG 0x08 +#define GENERAL_REG_RXTO_HOLDOFF_DISABLE BIT(24) #define SSP_REG 0x0c #define SPI_CS_CONTROL 0x18 #define SPI_CS_CONTROL_SW_MODE BIT(0) @@ -142,8 +144,13 @@ detection_done: __lpss_ssp_write_priv(drv_data, SPI_CS_CONTROL, value); /* Enable multiblock DMA transfers */ - if (drv_data->master_info->enable_dma) + if (drv_data->master_info->enable_dma) { __lpss_ssp_write_priv(drv_data, SSP_REG, 1); + + value = __lpss_ssp_read_priv(drv_data, GENERAL_REG); + value |= GENERAL_REG_RXTO_HOLDOFF_DISABLE; + __lpss_ssp_write_priv(drv_data, GENERAL_REG, value); + } } static void lpss_ssp_cs_control(struct driver_data *drv_data, bool enable) @@ -804,14 +811,6 @@ static int pxa2xx_spi_transfer_one_message(struct spi_master *master, return 0; } -static int pxa2xx_spi_prepare_transfer(struct spi_master *master) -{ - struct driver_data *drv_data = spi_master_get_devdata(master); - - pm_runtime_get_sync(&drv_data->pdev->dev); - return 0; -} - static int pxa2xx_spi_unprepare_transfer(struct spi_master *master) { struct driver_data *drv_data = spi_master_get_devdata(master); @@ -820,8 +819,6 @@ static int pxa2xx_spi_unprepare_transfer(struct spi_master *master) write_SSCR0(read_SSCR0(drv_data->ioaddr) & ~SSCR0_SSE, drv_data->ioaddr); - pm_runtime_mark_last_busy(&drv_data->pdev->dev); - pm_runtime_put_autosuspend(&drv_data->pdev->dev); return 0; } @@ -1134,8 +1131,8 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) master->cleanup = cleanup; master->setup = setup; master->transfer_one_message = pxa2xx_spi_transfer_one_message; - master->prepare_transfer_hardware = pxa2xx_spi_prepare_transfer; master->unprepare_transfer_hardware = pxa2xx_spi_unprepare_transfer; + master->auto_runtime_pm = true; drv_data->ssp_type = ssp->type; drv_data->null_dma_buf = (u32 *)PTR_ALIGN(&drv_data[1], DMA_ALIGNMENT); diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index b44a6ac3cec9..8719206a03a0 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -564,8 +564,12 @@ static void rspi_work(struct work_struct *work) unsigned long flags; int ret; - spin_lock_irqsave(&rspi->lock, flags); - while (!list_empty(&rspi->queue)) { + while (1) { + spin_lock_irqsave(&rspi->lock, flags); + if (list_empty(&rspi->queue)) { + spin_unlock_irqrestore(&rspi->lock, flags); + break; + } mesg = list_entry(rspi->queue.next, struct spi_message, queue); list_del_init(&mesg->queue); spin_unlock_irqrestore(&rspi->lock, flags); @@ -595,8 +599,6 @@ static void rspi_work(struct work_struct *work) mesg->status = 0; mesg->complete(mesg->context); - - spin_lock_irqsave(&rspi->lock, flags); } return; @@ -664,12 +666,13 @@ static irqreturn_t rspi_irq(int irq, void *_sr) static int rspi_request_dma(struct rspi_data *rspi, struct platform_device *pdev) { - struct rspi_plat_data *rspi_pd = pdev->dev.platform_data; + struct rspi_plat_data *rspi_pd = dev_get_platdata(&pdev->dev); + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); dma_cap_mask_t mask; struct dma_slave_config cfg; int ret; - if (!rspi_pd) + if (!res || !rspi_pd) return 0; /* The driver assumes no error. */ rspi->dma_width_16bit = rspi_pd->dma_width_16bit; @@ -683,6 +686,8 @@ static int rspi_request_dma(struct rspi_data *rspi, if (rspi->chan_rx) { cfg.slave_id = rspi_pd->dma_rx_id; cfg.direction = DMA_DEV_TO_MEM; + cfg.dst_addr = 0; + cfg.src_addr = res->start + RSPI_SPDR; ret = dmaengine_slave_config(rspi->chan_rx, &cfg); if (!ret) dev_info(&pdev->dev, "Use DMA when rx.\n"); @@ -698,6 +703,8 @@ static int rspi_request_dma(struct rspi_data *rspi, if (rspi->chan_tx) { cfg.slave_id = rspi_pd->dma_tx_id; cfg.direction = DMA_MEM_TO_DEV; + cfg.dst_addr = res->start + RSPI_SPDR; + cfg.src_addr = 0; ret = dmaengine_slave_config(rspi->chan_tx, &cfg); if (!ret) dev_info(&pdev->dev, "Use DMA when tx\n"); @@ -719,7 +726,7 @@ static void rspi_release_dma(struct rspi_data *rspi) static int rspi_remove(struct platform_device *pdev) { - struct rspi_data *rspi = platform_get_drvdata(pdev); + struct rspi_data *rspi = spi_master_get(platform_get_drvdata(pdev)); spi_unregister_master(rspi->master); rspi_release_dma(rspi); diff --git a/drivers/spi/spi-s3c24xx.c b/drivers/spi/spi-s3c24xx.c index 68910b310152..ce318d95a6ee 100644 --- a/drivers/spi/spi-s3c24xx.c +++ b/drivers/spi/spi-s3c24xx.c @@ -525,7 +525,7 @@ static int s3c24xx_spi_probe(struct platform_device *pdev) memset(hw, 0, sizeof(struct s3c24xx_spi)); hw->master = spi_master_get(master); - hw->pdata = pdata = pdev->dev.platform_data; + hw->pdata = pdata = dev_get_platdata(&pdev->dev); hw->dev = &pdev->dev; if (pdata == NULL) { @@ -690,7 +690,7 @@ static int s3c24xx_spi_remove(struct platform_device *dev) static int s3c24xx_spi_suspend(struct device *dev) { - struct s3c24xx_spi *hw = platform_get_drvdata(to_platform_device(dev)); + struct s3c24xx_spi *hw = dev_get_drvdata(dev); if (hw->pdata && hw->pdata->gpio_setup) hw->pdata->gpio_setup(hw->pdata, 0); @@ -701,7 +701,7 @@ static int s3c24xx_spi_suspend(struct device *dev) static int s3c24xx_spi_resume(struct device *dev) { - struct s3c24xx_spi *hw = platform_get_drvdata(to_platform_device(dev)); + struct s3c24xx_spi *hw = dev_get_drvdata(dev); s3c24xx_spi_initialsetup(hw); return 0; diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 63e2070c6c14..512b8893893b 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -172,7 +172,6 @@ struct s3c64xx_spi_port_config { * @master: Pointer to the SPI Protocol master. * @cntrlr_info: Platform specific data for the controller this driver manages. * @tgl_spi: Pointer to the last CS left untoggled by the cs_change hint. - * @queue: To log SPI xfer requests. * @lock: Controller specific lock. * @state: Set of FLAGS to indicate status. * @rx_dmach: Controller's DMA channel for Rx. @@ -193,7 +192,6 @@ struct s3c64xx_spi_driver_data { struct spi_master *master; struct s3c64xx_spi_info *cntrlr_info; struct spi_device *tgl_spi; - struct list_head queue; spinlock_t lock; unsigned long sfr_start; struct completion xfer_completion; @@ -338,8 +336,10 @@ static int acquire_dma(struct s3c64xx_spi_driver_data *sdd) req.cap = DMA_SLAVE; req.client = &s3c64xx_spi_dma_client; - sdd->rx_dma.ch = (void *)sdd->ops->request(sdd->rx_dma.dmach, &req, dev, "rx"); - sdd->tx_dma.ch = (void *)sdd->ops->request(sdd->tx_dma.dmach, &req, dev, "tx"); + sdd->rx_dma.ch = (struct dma_chan *)(unsigned long)sdd->ops->request( + sdd->rx_dma.dmach, &req, dev, "rx"); + sdd->tx_dma.ch = (struct dma_chan *)(unsigned long)sdd->ops->request( + sdd->tx_dma.dmach, &req, dev, "tx"); return 1; } @@ -356,8 +356,6 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi) while (!is_polling(sdd) && !acquire_dma(sdd)) usleep_range(10000, 11000); - pm_runtime_get_sync(&sdd->pdev->dev); - return 0; } @@ -372,7 +370,6 @@ static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi) sdd->ops->release((enum dma_ch)sdd->tx_dma.ch, &s3c64xx_spi_dma_client); } - pm_runtime_put(&sdd->pdev->dev); return 0; } @@ -389,9 +386,10 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma, { struct s3c64xx_spi_driver_data *sdd; struct dma_slave_config config; - struct scatterlist sg; struct dma_async_tx_descriptor *desc; + memset(&config, 0, sizeof(config)); + if (dma->direction == DMA_DEV_TO_MEM) { sdd = container_of((void *)dma, struct s3c64xx_spi_driver_data, rx_dma); @@ -410,14 +408,8 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma, dmaengine_slave_config(dma->ch, &config); } - sg_init_table(&sg, 1); - sg_dma_len(&sg) = len; - sg_set_page(&sg, pfn_to_page(PFN_DOWN(buf)), - len, offset_in_page(buf)); - sg_dma_address(&sg) = buf; - - desc = dmaengine_prep_slave_sg(dma->ch, - &sg, 1, dma->direction, DMA_PREP_INTERRUPT); + desc = dmaengine_prep_slave_single(dma->ch, buf, len, + dma->direction, DMA_PREP_INTERRUPT); desc->callback = s3c64xx_spi_dmacb; desc->callback_param = dma; @@ -434,27 +426,26 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi) dma_cap_mask_t mask; int ret; - if (is_polling(sdd)) - return 0; - - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - /* Acquire DMA channels */ - sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter, - (void*)sdd->rx_dma.dmach, dev, "rx"); - if (!sdd->rx_dma.ch) { - dev_err(dev, "Failed to get RX DMA channel\n"); - ret = -EBUSY; - goto out; - } + if (!is_polling(sdd)) { + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + + /* Acquire DMA channels */ + sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter, + (void *)sdd->rx_dma.dmach, dev, "rx"); + if (!sdd->rx_dma.ch) { + dev_err(dev, "Failed to get RX DMA channel\n"); + ret = -EBUSY; + goto out; + } - sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter, - (void*)sdd->tx_dma.dmach, dev, "tx"); - if (!sdd->tx_dma.ch) { - dev_err(dev, "Failed to get TX DMA channel\n"); - ret = -EBUSY; - goto out_rx; + sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter, + (void *)sdd->tx_dma.dmach, dev, "tx"); + if (!sdd->tx_dma.ch) { + dev_err(dev, "Failed to get TX DMA channel\n"); + ret = -EBUSY; + goto out_rx; + } } ret = pm_runtime_get_sync(&sdd->pdev->dev); @@ -1056,8 +1047,6 @@ static int s3c64xx_spi_setup(struct spi_device *spi) struct s3c64xx_spi_csinfo *cs = spi->controller_data; struct s3c64xx_spi_driver_data *sdd; struct s3c64xx_spi_info *sci; - struct spi_message *msg; - unsigned long flags; int err; sdd = spi_master_get_devdata(spi->master); @@ -1071,37 +1060,23 @@ static int s3c64xx_spi_setup(struct spi_device *spi) return -ENODEV; } - /* Request gpio only if cs line is asserted by gpio pins */ - if (sdd->cs_gpio) { - err = gpio_request_one(cs->line, GPIOF_OUT_INIT_HIGH, - dev_name(&spi->dev)); - if (err) { - dev_err(&spi->dev, - "Failed to get /CS gpio [%d]: %d\n", - cs->line, err); - goto err_gpio_req; + if (!spi_get_ctldata(spi)) { + /* Request gpio only if cs line is asserted by gpio pins */ + if (sdd->cs_gpio) { + err = gpio_request_one(cs->line, GPIOF_OUT_INIT_HIGH, + dev_name(&spi->dev)); + if (err) { + dev_err(&spi->dev, + "Failed to get /CS gpio [%d]: %d\n", + cs->line, err); + goto err_gpio_req; + } } - } - if (!spi_get_ctldata(spi)) spi_set_ctldata(spi, cs); - - sci = sdd->cntrlr_info; - - spin_lock_irqsave(&sdd->lock, flags); - - list_for_each_entry(msg, &sdd->queue, queue) { - /* Is some mssg is already queued for this device */ - if (msg->spi == spi) { - dev_err(&spi->dev, - "setup: attempt while mssg in queue!\n"); - spin_unlock_irqrestore(&sdd->lock, flags); - err = -EBUSY; - goto err_msgq; - } } - spin_unlock_irqrestore(&sdd->lock, flags); + sci = sdd->cntrlr_info; pm_runtime_get_sync(&sdd->pdev->dev); @@ -1149,7 +1124,6 @@ setup_exit: /* setup() returns with device de-selected */ disable_cs(sdd, spi); -err_msgq: gpio_free(cs->line); spi_set_ctldata(spi, NULL); @@ -1275,7 +1249,7 @@ static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev) #else static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev) { - return dev->platform_data; + return dev_get_platdata(dev); } #endif @@ -1300,7 +1274,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) struct resource *mem_res; struct resource *res; struct s3c64xx_spi_driver_data *sdd; - struct s3c64xx_spi_info *sci = pdev->dev.platform_data; + struct s3c64xx_spi_info *sci = dev_get_platdata(&pdev->dev); struct spi_master *master; int ret, irq; char clk_name[16]; @@ -1364,16 +1338,14 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) if (!sdd->pdev->dev.of_node) { res = platform_get_resource(pdev, IORESOURCE_DMA, 0); if (!res) { - dev_warn(&pdev->dev, "Unable to get SPI tx dma " - "resource. Switching to poll mode\n"); + dev_warn(&pdev->dev, "Unable to get SPI tx dma resource. Switching to poll mode\n"); sdd->port_conf->quirks = S3C64XX_SPI_QUIRK_POLL; } else sdd->tx_dma.dmach = res->start; res = platform_get_resource(pdev, IORESOURCE_DMA, 1); if (!res) { - dev_warn(&pdev->dev, "Unable to get SPI rx dma " - "resource. Switching to poll mode\n"); + dev_warn(&pdev->dev, "Unable to get SPI rx dma resource. Switching to poll mode\n"); sdd->port_conf->quirks = S3C64XX_SPI_QUIRK_POLL; } else sdd->rx_dma.dmach = res->start; @@ -1395,6 +1367,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) SPI_BPW_MASK(8); /* the spi->mode bits understood by this driver: */ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; + master->auto_runtime_pm = true; sdd->regs = devm_ioremap_resource(&pdev->dev, mem_res); if (IS_ERR(sdd->regs)) { @@ -1442,7 +1415,6 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) spin_lock_init(&sdd->lock); init_completion(&sdd->xfer_completion); - INIT_LIST_HEAD(&sdd->queue); ret = devm_request_irq(&pdev->dev, irq, s3c64xx_spi_irq, 0, "spi-s3c64xx", sdd); @@ -1464,8 +1436,8 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d with %d Slaves attached\n", sdd->port_id, master->num_chipselect); - dev_dbg(&pdev->dev, "\tIOmem=[0x%x-0x%x]\tDMA=[Rx-%d, Tx-%d]\n", - mem_res->end, mem_res->start, + dev_dbg(&pdev->dev, "\tIOmem=[%pR]\tDMA=[Rx-%d, Tx-%d]\n", + mem_res, sdd->rx_dma.dmach, sdd->tx_dma.dmach); pm_runtime_enable(&pdev->dev); diff --git a/drivers/spi/spi-sh-hspi.c b/drivers/spi/spi-sh-hspi.c index 716edf999538..0b68cb592fa4 100644 --- a/drivers/spi/spi-sh-hspi.c +++ b/drivers/spi/spi-sh-hspi.c @@ -99,21 +99,6 @@ static int hspi_status_check_timeout(struct hspi_priv *hspi, u32 mask, u32 val) /* * spi master function */ -static int hspi_prepare_transfer(struct spi_master *master) -{ - struct hspi_priv *hspi = spi_master_get_devdata(master); - - pm_runtime_get_sync(hspi->dev); - return 0; -} - -static int hspi_unprepare_transfer(struct spi_master *master) -{ - struct hspi_priv *hspi = spi_master_get_devdata(master); - - pm_runtime_put_sync(hspi->dev); - return 0; -} #define hspi_hw_cs_enable(hspi) hspi_hw_cs_ctrl(hspi, 0) #define hspi_hw_cs_disable(hspi) hspi_hw_cs_ctrl(hspi, 1) @@ -316,9 +301,8 @@ static int hspi_probe(struct platform_device *pdev) master->setup = hspi_setup; master->cleanup = hspi_cleanup; master->mode_bits = SPI_CPOL | SPI_CPHA; - master->prepare_transfer_hardware = hspi_prepare_transfer; + master->auto_runtime_pm = true; master->transfer_one_message = hspi_transfer_one_message; - master->unprepare_transfer_hardware = hspi_unprepare_transfer; ret = spi_register_master(master); if (ret < 0) { dev_err(&pdev->dev, "spi_register_master error.\n"); @@ -327,8 +311,6 @@ static int hspi_probe(struct platform_device *pdev) pm_runtime_enable(&pdev->dev); - dev_info(&pdev->dev, "probed\n"); - return 0; error1: diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 6688ce78df78..2a95435a6a11 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -645,7 +645,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) if (pdev->dev.of_node) p->info = sh_msiof_spi_parse_dt(&pdev->dev); else - p->info = pdev->dev.platform_data; + p->info = dev_get_platdata(&pdev->dev); if (!p->info) { dev_err(&pdev->dev, "failed to obtain device info\n"); diff --git a/drivers/spi/spi-sh-sci.c b/drivers/spi/spi-sh-sci.c index 097e506042be..8eefeb6007df 100644 --- a/drivers/spi/spi-sh-sci.c +++ b/drivers/spi/spi-sh-sci.c @@ -130,7 +130,7 @@ static int sh_sci_spi_probe(struct platform_device *dev) sp = spi_master_get_devdata(master); platform_set_drvdata(dev, sp); - sp->info = dev->dev.platform_data; + sp->info = dev_get_platdata(&dev->dev); /* setup spi bitbang adaptor */ sp->bitbang.master = spi_master_get(master); diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c index fc20bcfd90c3..fc5081ab3677 100644 --- a/drivers/spi/spi-sirf.c +++ b/drivers/spi/spi-sirf.c @@ -599,8 +599,7 @@ static int spi_sirfsoc_remove(struct platform_device *pdev) #ifdef CONFIG_PM static int spi_sirfsoc_suspend(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct spi_master *master = platform_get_drvdata(pdev); + struct spi_master *master = dev_get_drvdata(dev); struct sirfsoc_spi *sspi = spi_master_get_devdata(master); clk_disable(sspi->clk); @@ -609,8 +608,7 @@ static int spi_sirfsoc_suspend(struct device *dev) static int spi_sirfsoc_resume(struct device *dev) { - struct platform_device *pdev = to_platform_device(dev); - struct spi_master *master = platform_get_drvdata(pdev); + struct spi_master *master = dev_get_drvdata(dev); struct sirfsoc_spi *sspi = spi_master_get_devdata(master); clk_enable(sspi->clk); diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c index e8f542ab8935..c14e30c8af2e 100644 --- a/drivers/spi/spi-tegra114.c +++ b/drivers/spi/spi-tegra114.c @@ -816,14 +816,6 @@ static int tegra_spi_transfer_one_message(struct spi_master *master, msg->status = 0; msg->actual_length = 0; - ret = pm_runtime_get_sync(tspi->dev); - if (ret < 0) { - dev_err(tspi->dev, "runtime PM get failed: %d\n", ret); - msg->status = ret; - spi_finalize_current_message(master); - return ret; - } - single_xfer = list_is_singular(&msg->transfers); list_for_each_entry(xfer, &msg->transfers, transfer_list) { INIT_COMPLETION(tspi->xfer_completion); @@ -859,7 +851,6 @@ static int tegra_spi_transfer_one_message(struct spi_master *master, ret = 0; exit: tegra_spi_writel(tspi, tspi->def_command1_reg, SPI_COMMAND1); - pm_runtime_put(tspi->dev); msg->status = ret; spi_finalize_current_message(master); return ret; @@ -1053,6 +1044,7 @@ static int tegra_spi_probe(struct platform_device *pdev) master->transfer_one_message = tegra_spi_transfer_one_message; master->num_chipselect = MAX_CHIP_SELECT; master->bus_num = -1; + master->auto_runtime_pm = true; tspi->master = master; tspi->dev = &pdev->dev; diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c index c1d5d95e70ea..1d814dc6e000 100644 --- a/drivers/spi/spi-tegra20-sflash.c +++ b/drivers/spi/spi-tegra20-sflash.c @@ -335,12 +335,6 @@ static int tegra_sflash_transfer_one_message(struct spi_master *master, struct spi_device *spi = msg->spi; int ret; - ret = pm_runtime_get_sync(tsd->dev); - if (ret < 0) { - dev_err(tsd->dev, "pm_runtime_get() failed, err = %d\n", ret); - return ret; - } - msg->status = 0; msg->actual_length = 0; single_xfer = list_is_singular(&msg->transfers); @@ -380,7 +374,6 @@ exit: tegra_sflash_writel(tsd, tsd->def_command_reg, SPI_COMMAND); msg->status = ret; spi_finalize_current_message(master); - pm_runtime_put(tsd->dev); return ret; } @@ -477,6 +470,7 @@ static int tegra_sflash_probe(struct platform_device *pdev) master->mode_bits = SPI_CPOL | SPI_CPHA; master->setup = tegra_sflash_setup; master->transfer_one_message = tegra_sflash_transfer_one_message; + master->auto_runtime_pm = true; master->num_chipselect = MAX_CHIP_SELECT; master->bus_num = -1; diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c index 80490cc11ce5..c70353672a23 100644 --- a/drivers/spi/spi-tegra20-slink.c +++ b/drivers/spi/spi-tegra20-slink.c @@ -836,11 +836,6 @@ static int tegra_slink_transfer_one_message(struct spi_master *master, msg->status = 0; msg->actual_length = 0; - ret = pm_runtime_get_sync(tspi->dev); - if (ret < 0) { - dev_err(tspi->dev, "runtime get failed: %d\n", ret); - goto done; - } single_xfer = list_is_singular(&msg->transfers); list_for_each_entry(xfer, &msg->transfers, transfer_list) { @@ -878,8 +873,6 @@ static int tegra_slink_transfer_one_message(struct spi_master *master, exit: tegra_slink_writel(tspi, tspi->def_command_reg, SLINK_COMMAND); tegra_slink_writel(tspi, tspi->def_command2_reg, SLINK_COMMAND2); - pm_runtime_put(tspi->dev); -done: msg->status = ret; spi_finalize_current_message(master); return ret; @@ -1086,6 +1079,7 @@ static int tegra_slink_probe(struct platform_device *pdev) master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; master->setup = tegra_slink_setup; master->transfer_one_message = tegra_slink_transfer_one_message; + master->auto_runtime_pm = true; master->num_chipselect = MAX_CHIP_SELECT; master->bus_num = -1; diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c new file mode 100644 index 000000000000..e12d962a289f --- /dev/null +++ b/drivers/spi/spi-ti-qspi.c @@ -0,0 +1,574 @@ +/* + * TI QSPI driver + * + * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com + * Author: Sourav Poddar <sourav.poddar@ti.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GPLv2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/dmaengine.h> +#include <linux/omap-dma.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/pm_runtime.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/pinctrl/consumer.h> + +#include <linux/spi/spi.h> + +struct ti_qspi_regs { + u32 clkctrl; +}; + +struct ti_qspi { + struct completion transfer_complete; + + /* IRQ synchronization */ + spinlock_t lock; + + /* list synchronization */ + struct mutex list_lock; + + struct spi_master *master; + void __iomem *base; + struct clk *fclk; + struct device *dev; + + struct ti_qspi_regs ctx_reg; + + u32 spi_max_frequency; + u32 cmd; + u32 dc; + u32 stat; +}; + +#define QSPI_PID (0x0) +#define QSPI_SYSCONFIG (0x10) +#define QSPI_INTR_STATUS_RAW_SET (0x20) +#define QSPI_INTR_STATUS_ENABLED_CLEAR (0x24) +#define QSPI_INTR_ENABLE_SET_REG (0x28) +#define QSPI_INTR_ENABLE_CLEAR_REG (0x2c) +#define QSPI_SPI_CLOCK_CNTRL_REG (0x40) +#define QSPI_SPI_DC_REG (0x44) +#define QSPI_SPI_CMD_REG (0x48) +#define QSPI_SPI_STATUS_REG (0x4c) +#define QSPI_SPI_DATA_REG (0x50) +#define QSPI_SPI_SETUP0_REG (0x54) +#define QSPI_SPI_SWITCH_REG (0x64) +#define QSPI_SPI_SETUP1_REG (0x58) +#define QSPI_SPI_SETUP2_REG (0x5c) +#define QSPI_SPI_SETUP3_REG (0x60) +#define QSPI_SPI_DATA_REG_1 (0x68) +#define QSPI_SPI_DATA_REG_2 (0x6c) +#define QSPI_SPI_DATA_REG_3 (0x70) + +#define QSPI_COMPLETION_TIMEOUT msecs_to_jiffies(2000) + +#define QSPI_FCLK 192000000 + +/* Clock Control */ +#define QSPI_CLK_EN (1 << 31) +#define QSPI_CLK_DIV_MAX 0xffff + +/* Command */ +#define QSPI_EN_CS(n) (n << 28) +#define QSPI_WLEN(n) ((n - 1) << 19) +#define QSPI_3_PIN (1 << 18) +#define QSPI_RD_SNGL (1 << 16) +#define QSPI_WR_SNGL (2 << 16) +#define QSPI_RD_DUAL (3 << 16) +#define QSPI_RD_QUAD (7 << 16) +#define QSPI_INVAL (4 << 16) +#define QSPI_WC_CMD_INT_EN (1 << 14) +#define QSPI_FLEN(n) ((n - 1) << 0) + +/* STATUS REGISTER */ +#define WC 0x02 + +/* INTERRUPT REGISTER */ +#define QSPI_WC_INT_EN (1 << 1) +#define QSPI_WC_INT_DISABLE (1 << 1) + +/* Device Control */ +#define QSPI_DD(m, n) (m << (3 + n * 8)) +#define QSPI_CKPHA(n) (1 << (2 + n * 8)) +#define QSPI_CSPOL(n) (1 << (1 + n * 8)) +#define QSPI_CKPOL(n) (1 << (n * 8)) + +#define QSPI_FRAME 4096 + +#define QSPI_AUTOSUSPEND_TIMEOUT 2000 + +static inline unsigned long ti_qspi_read(struct ti_qspi *qspi, + unsigned long reg) +{ + return readl(qspi->base + reg); +} + +static inline void ti_qspi_write(struct ti_qspi *qspi, + unsigned long val, unsigned long reg) +{ + writel(val, qspi->base + reg); +} + +static int ti_qspi_setup(struct spi_device *spi) +{ + struct ti_qspi *qspi = spi_master_get_devdata(spi->master); + struct ti_qspi_regs *ctx_reg = &qspi->ctx_reg; + int clk_div = 0, ret; + u32 clk_ctrl_reg, clk_rate, clk_mask; + + if (spi->master->busy) { + dev_dbg(qspi->dev, "master busy doing other trasnfers\n"); + return -EBUSY; + } + + if (!qspi->spi_max_frequency) { + dev_err(qspi->dev, "spi max frequency not defined\n"); + return -EINVAL; + } + + clk_rate = clk_get_rate(qspi->fclk); + + clk_div = DIV_ROUND_UP(clk_rate, qspi->spi_max_frequency) - 1; + + if (clk_div < 0) { + dev_dbg(qspi->dev, "clock divider < 0, using /1 divider\n"); + return -EINVAL; + } + + if (clk_div > QSPI_CLK_DIV_MAX) { + dev_dbg(qspi->dev, "clock divider >%d , using /%d divider\n", + QSPI_CLK_DIV_MAX, QSPI_CLK_DIV_MAX + 1); + return -EINVAL; + } + + dev_dbg(qspi->dev, "hz: %d, clock divider %d\n", + qspi->spi_max_frequency, clk_div); + + ret = pm_runtime_get_sync(qspi->dev); + if (ret) { + dev_err(qspi->dev, "pm_runtime_get_sync() failed\n"); + return ret; + } + + clk_ctrl_reg = ti_qspi_read(qspi, QSPI_SPI_CLOCK_CNTRL_REG); + + clk_ctrl_reg &= ~QSPI_CLK_EN; + + /* disable SCLK */ + ti_qspi_write(qspi, clk_ctrl_reg, QSPI_SPI_CLOCK_CNTRL_REG); + + /* enable SCLK */ + clk_mask = QSPI_CLK_EN | clk_div; + ti_qspi_write(qspi, clk_mask, QSPI_SPI_CLOCK_CNTRL_REG); + ctx_reg->clkctrl = clk_mask; + + pm_runtime_mark_last_busy(qspi->dev); + ret = pm_runtime_put_autosuspend(qspi->dev); + if (ret < 0) { + dev_err(qspi->dev, "pm_runtime_put_autosuspend() failed\n"); + return ret; + } + + return 0; +} + +static void ti_qspi_restore_ctx(struct ti_qspi *qspi) +{ + struct ti_qspi_regs *ctx_reg = &qspi->ctx_reg; + + ti_qspi_write(qspi, ctx_reg->clkctrl, QSPI_SPI_CLOCK_CNTRL_REG); +} + +static int qspi_write_msg(struct ti_qspi *qspi, struct spi_transfer *t) +{ + int wlen, count, ret; + unsigned int cmd; + const u8 *txbuf; + + txbuf = t->tx_buf; + cmd = qspi->cmd | QSPI_WR_SNGL; + count = t->len; + wlen = t->bits_per_word; + + while (count) { + switch (wlen) { + case 8: + dev_dbg(qspi->dev, "tx cmd %08x dc %08x data %02x\n", + cmd, qspi->dc, *txbuf); + writeb(*txbuf, qspi->base + QSPI_SPI_DATA_REG); + ti_qspi_write(qspi, cmd, QSPI_SPI_CMD_REG); + ret = wait_for_completion_timeout(&qspi->transfer_complete, + QSPI_COMPLETION_TIMEOUT); + if (ret == 0) { + dev_err(qspi->dev, "write timed out\n"); + return -ETIMEDOUT; + } + txbuf += 1; + count -= 1; + break; + case 16: + dev_dbg(qspi->dev, "tx cmd %08x dc %08x data %04x\n", + cmd, qspi->dc, *txbuf); + writew(*((u16 *)txbuf), qspi->base + QSPI_SPI_DATA_REG); + ti_qspi_write(qspi, cmd, QSPI_SPI_CMD_REG); + ret = wait_for_completion_timeout(&qspi->transfer_complete, + QSPI_COMPLETION_TIMEOUT); + if (ret == 0) { + dev_err(qspi->dev, "write timed out\n"); + return -ETIMEDOUT; + } + txbuf += 2; + count -= 2; + break; + case 32: + dev_dbg(qspi->dev, "tx cmd %08x dc %08x data %08x\n", + cmd, qspi->dc, *txbuf); + writel(*((u32 *)txbuf), qspi->base + QSPI_SPI_DATA_REG); + ti_qspi_write(qspi, cmd, QSPI_SPI_CMD_REG); + ret = wait_for_completion_timeout(&qspi->transfer_complete, + QSPI_COMPLETION_TIMEOUT); + if (ret == 0) { + dev_err(qspi->dev, "write timed out\n"); + return -ETIMEDOUT; + } + txbuf += 4; + count -= 4; + break; + } + } + + return 0; +} + +static int qspi_read_msg(struct ti_qspi *qspi, struct spi_transfer *t) +{ + int wlen, count, ret; + unsigned int cmd; + u8 *rxbuf; + + rxbuf = t->rx_buf; + cmd = qspi->cmd; + switch (t->rx_nbits) { + case SPI_NBITS_DUAL: + cmd |= QSPI_RD_DUAL; + break; + case SPI_NBITS_QUAD: + cmd |= QSPI_RD_QUAD; + break; + default: + cmd |= QSPI_RD_SNGL; + break; + } + count = t->len; + wlen = t->bits_per_word; + + while (count) { + dev_dbg(qspi->dev, "rx cmd %08x dc %08x\n", cmd, qspi->dc); + ti_qspi_write(qspi, cmd, QSPI_SPI_CMD_REG); + ret = wait_for_completion_timeout(&qspi->transfer_complete, + QSPI_COMPLETION_TIMEOUT); + if (ret == 0) { + dev_err(qspi->dev, "read timed out\n"); + return -ETIMEDOUT; + } + switch (wlen) { + case 8: + *rxbuf = readb(qspi->base + QSPI_SPI_DATA_REG); + rxbuf += 1; + count -= 1; + break; + case 16: + *((u16 *)rxbuf) = readw(qspi->base + QSPI_SPI_DATA_REG); + rxbuf += 2; + count -= 2; + break; + case 32: + *((u32 *)rxbuf) = readl(qspi->base + QSPI_SPI_DATA_REG); + rxbuf += 4; + count -= 4; + break; + } + } + + return 0; +} + +static int qspi_transfer_msg(struct ti_qspi *qspi, struct spi_transfer *t) +{ + int ret; + + if (t->tx_buf) { + ret = qspi_write_msg(qspi, t); + if (ret) { + dev_dbg(qspi->dev, "Error while writing\n"); + return ret; + } + } + + if (t->rx_buf) { + ret = qspi_read_msg(qspi, t); + if (ret) { + dev_dbg(qspi->dev, "Error while reading\n"); + return ret; + } + } + + return 0; +} + +static int ti_qspi_start_transfer_one(struct spi_master *master, + struct spi_message *m) +{ + struct ti_qspi *qspi = spi_master_get_devdata(master); + struct spi_device *spi = m->spi; + struct spi_transfer *t; + int status = 0, ret; + int frame_length; + + /* setup device control reg */ + qspi->dc = 0; + + if (spi->mode & SPI_CPHA) + qspi->dc |= QSPI_CKPHA(spi->chip_select); + if (spi->mode & SPI_CPOL) + qspi->dc |= QSPI_CKPOL(spi->chip_select); + if (spi->mode & SPI_CS_HIGH) + qspi->dc |= QSPI_CSPOL(spi->chip_select); + + frame_length = (m->frame_length << 3) / spi->bits_per_word; + + frame_length = clamp(frame_length, 0, QSPI_FRAME); + + /* setup command reg */ + qspi->cmd = 0; + qspi->cmd |= QSPI_EN_CS(spi->chip_select); + qspi->cmd |= QSPI_FLEN(frame_length); + qspi->cmd |= QSPI_WC_CMD_INT_EN; + + ti_qspi_write(qspi, QSPI_WC_INT_EN, QSPI_INTR_ENABLE_SET_REG); + ti_qspi_write(qspi, qspi->dc, QSPI_SPI_DC_REG); + + mutex_lock(&qspi->list_lock); + + list_for_each_entry(t, &m->transfers, transfer_list) { + qspi->cmd |= QSPI_WLEN(t->bits_per_word); + + ret = qspi_transfer_msg(qspi, t); + if (ret) { + dev_dbg(qspi->dev, "transfer message failed\n"); + mutex_unlock(&qspi->list_lock); + return -EINVAL; + } + + m->actual_length += t->len; + } + + mutex_unlock(&qspi->list_lock); + + m->status = status; + spi_finalize_current_message(master); + + ti_qspi_write(qspi, qspi->cmd | QSPI_INVAL, QSPI_SPI_CMD_REG); + + return status; +} + +static irqreturn_t ti_qspi_isr(int irq, void *dev_id) +{ + struct ti_qspi *qspi = dev_id; + u16 int_stat; + + irqreturn_t ret = IRQ_HANDLED; + + spin_lock(&qspi->lock); + + int_stat = ti_qspi_read(qspi, QSPI_INTR_STATUS_ENABLED_CLEAR); + qspi->stat = ti_qspi_read(qspi, QSPI_SPI_STATUS_REG); + + if (!int_stat) { + dev_dbg(qspi->dev, "No IRQ triggered\n"); + ret = IRQ_NONE; + goto out; + } + + ret = IRQ_WAKE_THREAD; + + ti_qspi_write(qspi, QSPI_WC_INT_DISABLE, QSPI_INTR_ENABLE_CLEAR_REG); + ti_qspi_write(qspi, QSPI_WC_INT_DISABLE, + QSPI_INTR_STATUS_ENABLED_CLEAR); + +out: + spin_unlock(&qspi->lock); + + return ret; +} + +static irqreturn_t ti_qspi_threaded_isr(int this_irq, void *dev_id) +{ + struct ti_qspi *qspi = dev_id; + unsigned long flags; + + spin_lock_irqsave(&qspi->lock, flags); + + if (qspi->stat & WC) + complete(&qspi->transfer_complete); + + spin_unlock_irqrestore(&qspi->lock, flags); + + ti_qspi_write(qspi, QSPI_WC_INT_EN, QSPI_INTR_ENABLE_SET_REG); + + return IRQ_HANDLED; +} + +static int ti_qspi_runtime_resume(struct device *dev) +{ + struct ti_qspi *qspi; + struct spi_master *master; + + master = dev_get_drvdata(dev); + qspi = spi_master_get_devdata(master); + ti_qspi_restore_ctx(qspi); + + return 0; +} + +static const struct of_device_id ti_qspi_match[] = { + {.compatible = "ti,dra7xxx-qspi" }, + {.compatible = "ti,am4372-qspi" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ti_qspi_match); + +static int ti_qspi_probe(struct platform_device *pdev) +{ + struct ti_qspi *qspi; + struct spi_master *master; + struct resource *r; + struct device_node *np = pdev->dev.of_node; + u32 max_freq; + int ret = 0, num_cs, irq; + + master = spi_alloc_master(&pdev->dev, sizeof(*qspi)); + if (!master) + return -ENOMEM; + + master->mode_bits = SPI_CPOL | SPI_CPHA; + + master->bus_num = -1; + master->flags = SPI_MASTER_HALF_DUPLEX; + master->setup = ti_qspi_setup; + master->auto_runtime_pm = true; + master->transfer_one_message = ti_qspi_start_transfer_one; + master->dev.of_node = pdev->dev.of_node; + master->bits_per_word_mask = BIT(32 - 1) | BIT(16 - 1) | BIT(8 - 1); + + if (!of_property_read_u32(np, "num-cs", &num_cs)) + master->num_chipselect = num_cs; + + platform_set_drvdata(pdev, master); + + qspi = spi_master_get_devdata(master); + qspi->master = master; + qspi->dev = &pdev->dev; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no irq resource?\n"); + return irq; + } + + spin_lock_init(&qspi->lock); + mutex_init(&qspi->list_lock); + + qspi->base = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(qspi->base)) { + ret = PTR_ERR(qspi->base); + goto free_master; + } + + ret = devm_request_threaded_irq(&pdev->dev, irq, ti_qspi_isr, + ti_qspi_threaded_isr, 0, + dev_name(&pdev->dev), qspi); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to register ISR for IRQ %d\n", + irq); + goto free_master; + } + + qspi->fclk = devm_clk_get(&pdev->dev, "fck"); + if (IS_ERR(qspi->fclk)) { + ret = PTR_ERR(qspi->fclk); + dev_err(&pdev->dev, "could not get clk: %d\n", ret); + } + + init_completion(&qspi->transfer_complete); + + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, QSPI_AUTOSUSPEND_TIMEOUT); + pm_runtime_enable(&pdev->dev); + + if (!of_property_read_u32(np, "spi-max-frequency", &max_freq)) + qspi->spi_max_frequency = max_freq; + + ret = spi_register_master(master); + if (ret) + goto free_master; + + return 0; + +free_master: + spi_master_put(master); + return ret; +} + +static int ti_qspi_remove(struct platform_device *pdev) +{ + struct ti_qspi *qspi = platform_get_drvdata(pdev); + + spi_unregister_master(qspi->master); + + return 0; +} + +static const struct dev_pm_ops ti_qspi_pm_ops = { + .runtime_resume = ti_qspi_runtime_resume, +}; + +static struct platform_driver ti_qspi_driver = { + .probe = ti_qspi_probe, + .remove = ti_qspi_remove, + .driver = { + .name = "ti,dra7xxx-qspi", + .owner = THIS_MODULE, + .pm = &ti_qspi_pm_ops, + .of_match_table = ti_qspi_match, + } +}; + +module_platform_driver(ti_qspi_driver); + +MODULE_AUTHOR("Sourav Poddar <sourav.poddar@ti.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("TI QSPI controller driver"); diff --git a/drivers/spi/spi-ti-ssp.c b/drivers/spi/spi-ti-ssp.c index 10606fcc6efc..7d20e121e4c1 100644 --- a/drivers/spi/spi-ti-ssp.c +++ b/drivers/spi/spi-ti-ssp.c @@ -283,7 +283,7 @@ static int ti_ssp_spi_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; int error = 0; - pdata = dev->platform_data; + pdata = dev_get_platdata(dev); if (!pdata) { dev_err(dev, "platform data not found\n"); return -EINVAL; diff --git a/drivers/spi/spi-tle62x0.c b/drivers/spi/spi-tle62x0.c index 6b0874d782ed..b5a70e3fecb7 100644 --- a/drivers/spi/spi-tle62x0.c +++ b/drivers/spi/spi-tle62x0.c @@ -247,7 +247,7 @@ static int tle62x0_probe(struct spi_device *spi) int ptr; int ret; - pdata = spi->dev.platform_data; + pdata = dev_get_platdata(&spi->dev); if (pdata == NULL) { dev_err(&spi->dev, "no device data specified\n"); return -EINVAL; diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index 09a942852593..0bf1b2c457a1 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -80,10 +80,9 @@ struct xilinx_spi { /* bitbang has to be first */ struct spi_bitbang bitbang; struct completion done; - struct resource mem; /* phys mem */ void __iomem *regs; /* virt. address of the control registers */ - u32 irq; + int irq; u8 *rx_ptr; /* pointer in the Tx buffer */ const u8 *tx_ptr; /* pointer in the Rx buffer */ @@ -233,21 +232,6 @@ static int xilinx_spi_setup_transfer(struct spi_device *spi, return 0; } -static int xilinx_spi_setup(struct spi_device *spi) -{ - /* always return 0, we can not check the number of bits. - * There are cases when SPI setup is called before any driver is - * there, in that case the SPI core defaults to 8 bits, which we - * do not support in some cases. But if we return an error, the - * SPI device would not be registered and no driver can get hold of it - * When the driver is there, it will call SPI setup again with the - * correct number of bits per transfer. - * If a driver setups with the wrong bit number, it will fail when - * it tries to do a transfer - */ - return 0; -} - static void xilinx_spi_fill_tx_fifo(struct xilinx_spi *xspi) { u8 sr; @@ -355,17 +339,34 @@ static const struct of_device_id xilinx_spi_of_match[] = { }; MODULE_DEVICE_TABLE(of, xilinx_spi_of_match); -struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem, - u32 irq, s16 bus_num, int num_cs, int bits_per_word) +static int xilinx_spi_probe(struct platform_device *pdev) { - struct spi_master *master; struct xilinx_spi *xspi; - int ret; + struct xspi_platform_data *pdata; + struct resource *res; + int ret, num_cs = 0, bits_per_word = 8; + struct spi_master *master; u32 tmp; + u8 i; + + pdata = dev_get_platdata(&pdev->dev); + if (pdata) { + num_cs = pdata->num_chipselect; + bits_per_word = pdata->bits_per_word; + } else { + of_property_read_u32(pdev->dev.of_node, "xlnx,num-ss-bits", + &num_cs); + } + + if (!num_cs) { + dev_err(&pdev->dev, + "Missing slave select configuration data\n"); + return -EINVAL; + } - master = spi_alloc_master(dev, sizeof(struct xilinx_spi)); + master = spi_alloc_master(&pdev->dev, sizeof(struct xilinx_spi)); if (!master) - return NULL; + return -ENODEV; /* the spi->mode bits understood by this driver: */ master->mode_bits = SPI_CPOL | SPI_CPHA; @@ -375,25 +376,18 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem, xspi->bitbang.chipselect = xilinx_spi_chipselect; xspi->bitbang.setup_transfer = xilinx_spi_setup_transfer; xspi->bitbang.txrx_bufs = xilinx_spi_txrx_bufs; - xspi->bitbang.master->setup = xilinx_spi_setup; init_completion(&xspi->done); - if (!request_mem_region(mem->start, resource_size(mem), - XILINX_SPI_NAME)) + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + xspi->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(xspi->regs)) { + ret = PTR_ERR(xspi->regs); goto put_master; - - xspi->regs = ioremap(mem->start, resource_size(mem)); - if (xspi->regs == NULL) { - dev_warn(dev, "ioremap failure\n"); - goto map_failed; } - master->bus_num = bus_num; + master->bus_num = pdev->dev.id; master->num_chipselect = num_cs; - master->dev.of_node = dev->of_node; - - xspi->mem = *mem; - xspi->irq = irq; + master->dev.of_node = pdev->dev.of_node; /* * Detect endianess on the IP via loop bit in CR. Detection @@ -423,113 +417,63 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem, } else if (xspi->bits_per_word == 32) { xspi->tx_fn = xspi_tx32; xspi->rx_fn = xspi_rx32; - } else - goto unmap_io; - + } else { + ret = -EINVAL; + goto put_master; + } /* SPI controller initializations */ xspi_init_hw(xspi); + xspi->irq = platform_get_irq(pdev, 0); + if (xspi->irq < 0) { + ret = xspi->irq; + goto put_master; + } + /* Register for SPI Interrupt */ - ret = request_irq(xspi->irq, xilinx_spi_irq, 0, XILINX_SPI_NAME, xspi); + ret = devm_request_irq(&pdev->dev, xspi->irq, xilinx_spi_irq, 0, + dev_name(&pdev->dev), xspi); if (ret) - goto unmap_io; + goto put_master; ret = spi_bitbang_start(&xspi->bitbang); if (ret) { - dev_err(dev, "spi_bitbang_start FAILED\n"); - goto free_irq; - } - - dev_info(dev, "at 0x%08llX mapped to 0x%p, irq=%d\n", - (unsigned long long)mem->start, xspi->regs, xspi->irq); - return master; - -free_irq: - free_irq(xspi->irq, xspi); -unmap_io: - iounmap(xspi->regs); -map_failed: - release_mem_region(mem->start, resource_size(mem)); -put_master: - spi_master_put(master); - return NULL; -} -EXPORT_SYMBOL(xilinx_spi_init); - -void xilinx_spi_deinit(struct spi_master *master) -{ - struct xilinx_spi *xspi; - - xspi = spi_master_get_devdata(master); - - spi_bitbang_stop(&xspi->bitbang); - free_irq(xspi->irq, xspi); - iounmap(xspi->regs); - - release_mem_region(xspi->mem.start, resource_size(&xspi->mem)); - spi_master_put(xspi->bitbang.master); -} -EXPORT_SYMBOL(xilinx_spi_deinit); - -static int xilinx_spi_probe(struct platform_device *dev) -{ - struct xspi_platform_data *pdata; - struct resource *r; - int irq, num_cs = 0, bits_per_word = 8; - struct spi_master *master; - u8 i; - - pdata = dev->dev.platform_data; - if (pdata) { - num_cs = pdata->num_chipselect; - bits_per_word = pdata->bits_per_word; - } - -#ifdef CONFIG_OF - if (dev->dev.of_node) { - const __be32 *prop; - int len; - - /* number of slave select bits is required */ - prop = of_get_property(dev->dev.of_node, "xlnx,num-ss-bits", - &len); - if (prop && len >= sizeof(*prop)) - num_cs = __be32_to_cpup(prop); - } -#endif - - if (!num_cs) { - dev_err(&dev->dev, "Missing slave select configuration data\n"); - return -EINVAL; + dev_err(&pdev->dev, "spi_bitbang_start FAILED\n"); + goto put_master; } - - r = platform_get_resource(dev, IORESOURCE_MEM, 0); - if (!r) - return -ENODEV; - - irq = platform_get_irq(dev, 0); - if (irq < 0) - return -ENXIO; - - master = xilinx_spi_init(&dev->dev, r, irq, dev->id, num_cs, - bits_per_word); - if (!master) - return -ENODEV; + dev_info(&pdev->dev, "at 0x%08llX mapped to 0x%p, irq=%d\n", + (unsigned long long)res->start, xspi->regs, xspi->irq); if (pdata) { for (i = 0; i < pdata->num_devices; i++) spi_new_device(master, pdata->devices + i); } - platform_set_drvdata(dev, master); + platform_set_drvdata(pdev, master); return 0; + +put_master: + spi_master_put(master); + + return ret; } -static int xilinx_spi_remove(struct platform_device *dev) +static int xilinx_spi_remove(struct platform_device *pdev) { - xilinx_spi_deinit(platform_get_drvdata(dev)); + struct spi_master *master = platform_get_drvdata(pdev); + struct xilinx_spi *xspi = spi_master_get_devdata(master); + void __iomem *regs_base = xspi->regs; + + spi_bitbang_stop(&xspi->bitbang); + + /* Disable all the interrupts just in case */ + xspi->write_fn(0, regs_base + XIPIF_V123B_IIER_OFFSET); + /* Disable the global IPIF interrupt */ + xspi->write_fn(0, regs_base + XIPIF_V123B_DGIER_OFFSET); + + spi_master_put(xspi->bitbang.master); return 0; } diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 978dda2c5239..9e039c60c068 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -553,6 +553,10 @@ static void spi_pump_messages(struct kthread_work *work) master->unprepare_transfer_hardware(master)) dev_err(&master->dev, "failed to unprepare transfer hardware\n"); + if (master->auto_runtime_pm) { + pm_runtime_mark_last_busy(master->dev.parent); + pm_runtime_put_autosuspend(master->dev.parent); + } return; } @@ -572,11 +576,23 @@ static void spi_pump_messages(struct kthread_work *work) master->busy = true; spin_unlock_irqrestore(&master->queue_lock, flags); + if (!was_busy && master->auto_runtime_pm) { + ret = pm_runtime_get_sync(master->dev.parent); + if (ret < 0) { + dev_err(&master->dev, "Failed to power device: %d\n", + ret); + return; + } + } + if (!was_busy && master->prepare_transfer_hardware) { ret = master->prepare_transfer_hardware(master); if (ret) { dev_err(&master->dev, "failed to prepare transfer hardware\n"); + + if (master->auto_runtime_pm) + pm_runtime_put(master->dev.parent); return; } } @@ -774,7 +790,7 @@ static int spi_queued_transfer(struct spi_device *spi, struct spi_message *msg) msg->status = -EINPROGRESS; list_add_tail(&msg->queue, &master->queue); - if (master->running && !master->busy) + if (!master->busy) queue_kthread_work(&master->kworker, &master->pump_messages); spin_unlock_irqrestore(&master->queue_lock, flags); @@ -869,6 +885,47 @@ static void of_register_spi_devices(struct spi_master *master) if (of_find_property(nc, "spi-3wire", NULL)) spi->mode |= SPI_3WIRE; + /* Device DUAL/QUAD mode */ + prop = of_get_property(nc, "spi-tx-bus-width", &len); + if (prop && len == sizeof(*prop)) { + switch (be32_to_cpup(prop)) { + case SPI_NBITS_SINGLE: + break; + case SPI_NBITS_DUAL: + spi->mode |= SPI_TX_DUAL; + break; + case SPI_NBITS_QUAD: + spi->mode |= SPI_TX_QUAD; + break; + default: + dev_err(&master->dev, + "spi-tx-bus-width %d not supported\n", + be32_to_cpup(prop)); + spi_dev_put(spi); + continue; + } + } + + prop = of_get_property(nc, "spi-rx-bus-width", &len); + if (prop && len == sizeof(*prop)) { + switch (be32_to_cpup(prop)) { + case SPI_NBITS_SINGLE: + break; + case SPI_NBITS_DUAL: + spi->mode |= SPI_RX_DUAL; + break; + case SPI_NBITS_QUAD: + spi->mode |= SPI_RX_QUAD; + break; + default: + dev_err(&master->dev, + "spi-rx-bus-width %d not supported\n", + be32_to_cpup(prop)); + spi_dev_put(spi); + continue; + } + } + /* Device speed */ prop = of_get_property(nc, "spi-max-frequency", &len); if (!prop || len < sizeof(*prop)) { @@ -1169,7 +1226,7 @@ int spi_register_master(struct spi_master *master) else { status = spi_master_initialize_queue(master); if (status) { - device_unregister(&master->dev); + device_del(&master->dev); goto done; } } @@ -1316,6 +1373,19 @@ int spi_setup(struct spi_device *spi) unsigned bad_bits; int status = 0; + /* check mode to prevent that DUAL and QUAD set at the same time + */ + if (((spi->mode & SPI_TX_DUAL) && (spi->mode & SPI_TX_QUAD)) || + ((spi->mode & SPI_RX_DUAL) && (spi->mode & SPI_RX_QUAD))) { + dev_err(&spi->dev, + "setup: can not select dual and quad at the same time\n"); + return -EINVAL; + } + /* if it is SPI_3WIRE mode, DUAL and QUAD should be forbidden + */ + if ((spi->mode & SPI_3WIRE) && (spi->mode & + (SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD))) + return -EINVAL; /* help drivers fail *cleanly* when they need options * that aren't supported with their current master */ @@ -1351,6 +1421,11 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) struct spi_master *master = spi->master; struct spi_transfer *xfer; + if (list_empty(&message->transfers)) + return -EINVAL; + if (!message->complete) + return -EINVAL; + /* Half-duplex links include original MicroWire, and ones with * only one data pin like SPI_3WIRE (switches direction) or where * either MOSI or MISO is missing. They can also be caused by @@ -1373,12 +1448,20 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) /** * Set transfer bits_per_word and max speed as spi device default if * it is not set for this transfer. + * Set transfer tx_nbits and rx_nbits as single transfer default + * (SPI_NBITS_SINGLE) if it is not set for this transfer. */ list_for_each_entry(xfer, &message->transfers, transfer_list) { + message->frame_length += xfer->len; if (!xfer->bits_per_word) xfer->bits_per_word = spi->bits_per_word; - if (!xfer->speed_hz) + if (!xfer->speed_hz) { xfer->speed_hz = spi->max_speed_hz; + if (master->max_speed_hz && + xfer->speed_hz > master->max_speed_hz) + xfer->speed_hz = master->max_speed_hz; + } + if (master->bits_per_word_mask) { /* Only 32 bits fit in the mask */ if (xfer->bits_per_word > 32) @@ -1387,6 +1470,54 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) BIT(xfer->bits_per_word - 1))) return -EINVAL; } + + if (xfer->speed_hz && master->min_speed_hz && + xfer->speed_hz < master->min_speed_hz) + return -EINVAL; + if (xfer->speed_hz && master->max_speed_hz && + xfer->speed_hz > master->max_speed_hz) + return -EINVAL; + + if (xfer->tx_buf && !xfer->tx_nbits) + xfer->tx_nbits = SPI_NBITS_SINGLE; + if (xfer->rx_buf && !xfer->rx_nbits) + xfer->rx_nbits = SPI_NBITS_SINGLE; + /* check transfer tx/rx_nbits: + * 1. keep the value is not out of single, dual and quad + * 2. keep tx/rx_nbits is contained by mode in spi_device + * 3. if SPI_3WIRE, tx/rx_nbits should be in single + */ + if (xfer->tx_buf) { + if (xfer->tx_nbits != SPI_NBITS_SINGLE && + xfer->tx_nbits != SPI_NBITS_DUAL && + xfer->tx_nbits != SPI_NBITS_QUAD) + return -EINVAL; + if ((xfer->tx_nbits == SPI_NBITS_DUAL) && + !(spi->mode & (SPI_TX_DUAL | SPI_TX_QUAD))) + return -EINVAL; + if ((xfer->tx_nbits == SPI_NBITS_QUAD) && + !(spi->mode & SPI_TX_QUAD)) + return -EINVAL; + if ((spi->mode & SPI_3WIRE) && + (xfer->tx_nbits != SPI_NBITS_SINGLE)) + return -EINVAL; + } + /* check transfer rx_nbits */ + if (xfer->rx_buf) { + if (xfer->rx_nbits != SPI_NBITS_SINGLE && + xfer->rx_nbits != SPI_NBITS_DUAL && + xfer->rx_nbits != SPI_NBITS_QUAD) + return -EINVAL; + if ((xfer->rx_nbits == SPI_NBITS_DUAL) && + !(spi->mode & (SPI_RX_DUAL | SPI_RX_QUAD))) + return -EINVAL; + if ((xfer->rx_nbits == SPI_NBITS_QUAD) && + !(spi->mode & SPI_RX_QUAD)) + return -EINVAL; + if ((spi->mode & SPI_3WIRE) && + (xfer->rx_nbits != SPI_NBITS_SINGLE)) + return -EINVAL; + } } message->spi = spi; |
