From 90808738fd242ef2533e86f2f481bebe8a7aa11b Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Wed, 13 Nov 2013 23:44:15 +0000 Subject: [PATCH 001/112] spi: Factor validation and initialisation of messages outside lock Currently we do a bunch of per-message validation and initialisation in __spi_async() which is called with the bus lock held. Since none of this validation depends on the current bus status there's no need to hold the lock to do it so split it out into a separate __spi_validate() function which is called prior to taking the bus lock. This could be slightly neater but keep things simple for now to show the code motion clearly. Based on observations from Martin Sperl. Signed-off-by: Mark Brown --- drivers/spi/spi.c | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 18cc625d887f..857ee8c407b1 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1596,15 +1596,11 @@ int spi_setup(struct spi_device *spi) } EXPORT_SYMBOL_GPL(spi_setup); -static int __spi_async(struct spi_device *spi, struct spi_message *message) +static int __spi_validate(struct spi_device *spi, struct spi_message *message) { struct spi_master *master = spi->master; struct spi_transfer *xfer; - message->spi = spi; - - trace_spi_message_submit(message); - if (list_empty(&message->transfers)) return -EINVAL; if (!message->complete) @@ -1705,6 +1701,18 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) } message->status = -EINPROGRESS; + + return 0; +} + +static int __spi_async(struct spi_device *spi, struct spi_message *message) +{ + struct spi_master *master = spi->master; + + message->spi = spi; + + trace_spi_message_submit(message); + return master->transfer(spi, message); } @@ -1743,6 +1751,10 @@ int spi_async(struct spi_device *spi, struct spi_message *message) int ret; unsigned long flags; + ret = __spi_validate(spi, message); + if (ret != 0) + return ret; + spin_lock_irqsave(&master->bus_lock_spinlock, flags); if (master->bus_lock_flag) @@ -1791,6 +1803,10 @@ int spi_async_locked(struct spi_device *spi, struct spi_message *message) int ret; unsigned long flags; + ret = __spi_validate(spi, message); + if (ret != 0) + return ret; + spin_lock_irqsave(&master->bus_lock_spinlock, flags); ret = __spi_async(spi, message); From a4ee96e4886768a177e4dc4935ac676513913581 Mon Sep 17 00:00:00 2001 From: Santosh Shilimkar Date: Mon, 30 Sep 2013 14:52:59 -0400 Subject: [PATCH 002/112] spi: davinci: Fix the build warning with CONFIG_ARM_LPAE=y MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit With CONFIG_ARM_LPAE=y spi driver throws below warning drivers/spi/spi-davinci.c: In function ‘davinci_spi_probe’: drivers/spi/spi-davinci.c:965:3: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘resource_size_t’ [-Wformat] drivers/spi/spi-davinci.c:965:3: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘resource_size_t’ [-Wformat] Lets use '%pa' to properly print 'resource_size_t' type variables. Signed-off-by: Santosh Shilimkar Signed-off-by: Mark Brown --- drivers/spi/spi-davinci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c index 50b2d88c8190..d3f638613b40 100644 --- a/drivers/spi/spi-davinci.c +++ b/drivers/spi/spi-davinci.c @@ -963,8 +963,8 @@ static int davinci_spi_probe(struct platform_device *pdev) goto free_clk; dev_info(&pdev->dev, "DMA: supported\n"); - dev_info(&pdev->dev, "DMA: RX channel: %d, TX channel: %d, " - "event queue: %d\n", dma_rx_chan, dma_tx_chan, + dev_info(&pdev->dev, "DMA: RX channel: %pa, TX channel: %pa, " + "event queue: %d\n", &dma_rx_chan, &dma_tx_chan, pdata->dma_event_q); } From 21b2ce5e992f274c9cc45710d29aec11c8b5599a Mon Sep 17 00:00:00 2001 From: Victor Kamensky Date: Sat, 16 Nov 2013 02:01:16 +0200 Subject: [PATCH 003/112] spi: omap2-mcspi: raw read and write endian fix All OMAP IP blocks expect LE data, but CPU may operate in BE mode. Need to use endian neutral functions to read/write h/w registers. I.e instead of __raw_read[lw] and __raw_write[lw] functions code need to use read[lw]_relaxed and write[lw]_relaxed functions. If the first simply reads/writes register, the second will byteswap it if host operates in BE mode. Changes are trivial sed like replacement of __raw_xxx functions with xxx_relaxed variant. Signed-off-by: Victor Kamensky Signed-off-by: Taras Kondratiuk Signed-off-by: Mark Brown --- drivers/spi/spi-omap2-mcspi.c | 38 +++++++++++++++++------------------ 1 file changed, 19 insertions(+), 19 deletions(-) diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 443df39840bc..a72127f08e39 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -157,14 +157,14 @@ static inline void mcspi_write_reg(struct spi_master *master, { struct omap2_mcspi *mcspi = spi_master_get_devdata(master); - __raw_writel(val, mcspi->base + idx); + writel_relaxed(val, mcspi->base + idx); } static inline u32 mcspi_read_reg(struct spi_master *master, int idx) { struct omap2_mcspi *mcspi = spi_master_get_devdata(master); - return __raw_readl(mcspi->base + idx); + return readl_relaxed(mcspi->base + idx); } static inline void mcspi_write_cs_reg(const struct spi_device *spi, @@ -172,14 +172,14 @@ static inline void mcspi_write_cs_reg(const struct spi_device *spi, { struct omap2_mcspi_cs *cs = spi->controller_state; - __raw_writel(val, cs->base + idx); + writel_relaxed(val, cs->base + idx); } static inline u32 mcspi_read_cs_reg(const struct spi_device *spi, int idx) { struct omap2_mcspi_cs *cs = spi->controller_state; - return __raw_readl(cs->base + idx); + return readl_relaxed(cs->base + idx); } static inline u32 mcspi_cached_chconf0(const struct spi_device *spi) @@ -338,7 +338,7 @@ static void omap2_mcspi_restore_ctx(struct omap2_mcspi *mcspi) mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_WAKEUPENABLE, ctx->wakeupenable); list_for_each_entry(cs, &ctx->cs, node) - __raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0); + writel_relaxed(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0); } static int mcspi_wait_for_reg_bit(void __iomem *reg, unsigned long bit) @@ -346,9 +346,9 @@ static int mcspi_wait_for_reg_bit(void __iomem *reg, unsigned long bit) unsigned long timeout; timeout = jiffies + msecs_to_jiffies(1000); - while (!(__raw_readl(reg) & bit)) { + while (!(readl_relaxed(reg) & bit)) { if (time_after(jiffies, timeout)) { - if (!(__raw_readl(reg) & bit)) + if (!(readl_relaxed(reg) & bit)) return -ETIMEDOUT; else return 0; @@ -675,7 +675,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer) } dev_vdbg(&spi->dev, "write-%d %02x\n", word_len, *tx); - __raw_writel(*tx++, tx_reg); + writel_relaxed(*tx++, tx_reg); } if (rx != NULL) { if (mcspi_wait_for_reg_bit(chstat_reg, @@ -687,7 +687,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer) if (c == 1 && tx == NULL && (l & OMAP2_MCSPI_CHCONF_TURBO)) { omap2_mcspi_set_enable(spi, 0); - *rx++ = __raw_readl(rx_reg); + *rx++ = readl_relaxed(rx_reg); dev_vdbg(&spi->dev, "read-%d %02x\n", word_len, *(rx - 1)); if (mcspi_wait_for_reg_bit(chstat_reg, @@ -701,7 +701,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer) omap2_mcspi_set_enable(spi, 0); } - *rx++ = __raw_readl(rx_reg); + *rx++ = readl_relaxed(rx_reg); dev_vdbg(&spi->dev, "read-%d %02x\n", word_len, *(rx - 1)); } @@ -722,7 +722,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer) } dev_vdbg(&spi->dev, "write-%d %04x\n", word_len, *tx); - __raw_writel(*tx++, tx_reg); + writel_relaxed(*tx++, tx_reg); } if (rx != NULL) { if (mcspi_wait_for_reg_bit(chstat_reg, @@ -734,7 +734,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer) if (c == 2 && tx == NULL && (l & OMAP2_MCSPI_CHCONF_TURBO)) { omap2_mcspi_set_enable(spi, 0); - *rx++ = __raw_readl(rx_reg); + *rx++ = readl_relaxed(rx_reg); dev_vdbg(&spi->dev, "read-%d %04x\n", word_len, *(rx - 1)); if (mcspi_wait_for_reg_bit(chstat_reg, @@ -748,7 +748,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer) omap2_mcspi_set_enable(spi, 0); } - *rx++ = __raw_readl(rx_reg); + *rx++ = readl_relaxed(rx_reg); dev_vdbg(&spi->dev, "read-%d %04x\n", word_len, *(rx - 1)); } @@ -769,7 +769,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer) } dev_vdbg(&spi->dev, "write-%d %08x\n", word_len, *tx); - __raw_writel(*tx++, tx_reg); + writel_relaxed(*tx++, tx_reg); } if (rx != NULL) { if (mcspi_wait_for_reg_bit(chstat_reg, @@ -781,7 +781,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer) if (c == 4 && tx == NULL && (l & OMAP2_MCSPI_CHCONF_TURBO)) { omap2_mcspi_set_enable(spi, 0); - *rx++ = __raw_readl(rx_reg); + *rx++ = readl_relaxed(rx_reg); dev_vdbg(&spi->dev, "read-%d %08x\n", word_len, *(rx - 1)); if (mcspi_wait_for_reg_bit(chstat_reg, @@ -795,7 +795,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer) omap2_mcspi_set_enable(spi, 0); } - *rx++ = __raw_readl(rx_reg); + *rx++ = readl_relaxed(rx_reg); dev_vdbg(&spi->dev, "read-%d %08x\n", word_len, *(rx - 1)); } @@ -1107,7 +1107,7 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m) /* RX_ONLY mode needs dummy data in TX reg */ if (t->tx_buf == NULL) - __raw_writel(0, cs->base + writel_relaxed(0, cs->base + OMAP2_MCSPI_TX0); if ((mcspi_dma->dma_rx && mcspi_dma->dma_tx) && @@ -1470,9 +1470,9 @@ static int omap2_mcspi_resume(struct device *dev) * change in account. */ cs->chconf0 |= OMAP2_MCSPI_CHCONF_FORCE; - __raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0); + writel_relaxed(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0); cs->chconf0 &= ~OMAP2_MCSPI_CHCONF_FORCE; - __raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0); + writel_relaxed(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0); } } pm_runtime_mark_last_busy(mcspi->dev); From d9dda5a1917a01e6317f7bee81e7e6ed236d7e0a Mon Sep 17 00:00:00 2001 From: Ezequiel Garcia Date: Sun, 24 Nov 2013 09:37:01 -0300 Subject: [PATCH 004/112] spi: spi-gpio: Use 'cansleep' variants to access GPIO The GPIO chip in use could be of any kind, and therefore might sleep when accesing the GPIO lines. Take account of this by using cansleep instead, which is the most generic case. Signed-off-by: Ezequiel Garcia Signed-off-by: Mark Brown --- drivers/spi/spi-gpio.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c index 3fb09f981980..7beeb29472ac 100644 --- a/drivers/spi/spi-gpio.c +++ b/drivers/spi/spi-gpio.c @@ -115,17 +115,17 @@ spi_to_pdata(const struct spi_device *spi) static inline void setsck(const struct spi_device *spi, int is_on) { - gpio_set_value(SPI_SCK_GPIO, is_on); + gpio_set_value_cansleep(SPI_SCK_GPIO, is_on); } static inline void setmosi(const struct spi_device *spi, int is_on) { - gpio_set_value(SPI_MOSI_GPIO, is_on); + gpio_set_value_cansleep(SPI_MOSI_GPIO, is_on); } static inline int getmiso(const struct spi_device *spi) { - return !!gpio_get_value(SPI_MISO_GPIO); + return !!gpio_get_value_cansleep(SPI_MISO_GPIO); } #undef pdata @@ -229,7 +229,7 @@ static void spi_gpio_chipselect(struct spi_device *spi, int is_active) if (cs != SPI_GPIO_NO_CHIPSELECT) { /* SPI is normally active-low */ - gpio_set_value(cs, (spi->mode & SPI_CS_HIGH) ? is_active : !is_active); + gpio_set_value_cansleep(cs, (spi->mode & SPI_CS_HIGH) ? is_active : !is_active); } } From 0079aae0f1e6179d85323b22b370a9cc15c89d45 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Sun, 24 Nov 2013 14:29:25 +0000 Subject: [PATCH 005/112] spi: omap2: Add build dependencies for writel_relaxed() It's not reliably available. Signed-off-by: Mark Brown --- drivers/spi/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index eb1f1ef5fa2e..49bf35633040 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -301,6 +301,7 @@ config SPI_OMAP_UWIRE config SPI_OMAP24XX tristate "McSPI driver for OMAP" + depends on ARM || ARM64 || AVR32 || HEXAGON || MIPS || SH depends on ARCH_OMAP2PLUS || COMPILE_TEST help SPI master controller for OMAP24XX and later Multichannel SPI From 3e6006e4aec37b6e0d524dad5c8f85f49f4507f5 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 27 Nov 2013 11:18:06 +0100 Subject: [PATCH 006/112] spi: sh-msiof: Fix warnings due to improper casts Cast pointers to uintptr_t instead of unsigned int. This fixes warnings on platforms where pointers have a different size than int. Signed-off-by: Laurent Pinchart Signed-off-by: Mark Brown --- drivers/spi/spi-sh-msiof.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index c74298cf70e2..86f822a656ef 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -421,7 +421,7 @@ static void sh_msiof_spi_chipselect(struct spi_device *spi, int is_on) } /* use spi->controller data for CS (same strategy as spi_gpio) */ - gpio_set_value((unsigned)spi->controller_data, value); + gpio_set_value((uintptr_t)spi->controller_data, value); if (is_on == BITBANG_CS_INACTIVE) { if (test_and_clear_bit(0, &p->flags)) { From 8e1c8096faae6b8ac788a1bbeeea126044cb485a Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 27 Nov 2013 01:41:44 +0100 Subject: [PATCH 007/112] spi: rcar: Fix uninitialized variable warning The transfer data length variable is set based on the desired access size, without a default case. This results in a compiler warning, even though the access size is always set to a supported value. Create a default case to silence the warning. Signed-off-by: Laurent Pinchart Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 58449ad4ad0d..a3dca1dfd8ab 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -268,7 +268,7 @@ static int qspi_set_config_register(struct rspi_data *rspi, int access_size) spcmd = SPCMD_SPB_8BIT; else if (access_size == 16) spcmd = SPCMD_SPB_16BIT; - else if (access_size == 32) + else spcmd = SPCMD_SPB_32BIT; spcmd |= SPCMD_SCKDEN | SPCMD_SLNDEN | SPCMD_SSLKP | SPCMD_SPNDEN; From 5ffbe2d90d81b8734eaf69ee4dad8507f318aad0 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 27 Nov 2013 01:41:45 +0100 Subject: [PATCH 008/112] spi: rcar: Fix pointer cast in the remove function The platform driver data is set to point to the rspi_data structure at probe time. Calling spi_master_get() on the pointer is just plain wrong and only works by chance. Fix it by using the platform driver data directly. Signed-off-by: Laurent Pinchart Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index a3dca1dfd8ab..621be5dbea31 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -885,14 +885,13 @@ static void rspi_release_dma(struct rspi_data *rspi) static int rspi_remove(struct platform_device *pdev) { - struct rspi_data *rspi = spi_master_get(platform_get_drvdata(pdev)); + struct rspi_data *rspi = platform_get_drvdata(pdev); spi_unregister_master(rspi->master); rspi_release_dma(rspi); free_irq(platform_get_irq(pdev, 0), rspi); clk_put(rspi->clk); iounmap(rspi->addr); - spi_master_put(rspi->master); return 0; } From 5d79e9ac89b45643c98b68ea7ce62c80b3b4e160 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 27 Nov 2013 01:41:46 +0100 Subject: [PATCH 009/112] spi: rcar: Use devm_* managed allocators This simplies error and cleanup code paths. Signed-off-by: Laurent Pinchart Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 38 +++++++++++++------------------------- 1 file changed, 13 insertions(+), 25 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 621be5dbea31..19c65c43cbc5 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -889,9 +889,6 @@ static int rspi_remove(struct platform_device *pdev) spi_unregister_master(rspi->master); rspi_release_dma(rspi); - free_irq(platform_get_irq(pdev, 0), rspi); - clk_put(rspi->clk); - iounmap(rspi->addr); return 0; } @@ -913,12 +910,6 @@ static int rspi_probe(struct platform_device *pdev) dev_err(&pdev->dev, "there is no set_config_register\n"); return -ENODEV; } - /* get base addr */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (unlikely(res == NULL)) { - dev_err(&pdev->dev, "invalid resource\n"); - return -EINVAL; - } irq = platform_get_irq(pdev, 0); if (irq < 0) { @@ -936,19 +927,20 @@ static int rspi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, rspi); rspi->ops = ops; rspi->master = master; - rspi->addr = ioremap(res->start, resource_size(res)); - if (rspi->addr == NULL) { - dev_err(&pdev->dev, "ioremap error.\n"); - ret = -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + rspi->addr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(rspi->addr)) { + ret = PTR_ERR(rspi->addr); goto error1; } snprintf(clk_name, sizeof(clk_name), "%s%d", id_entry->name, pdev->id); - rspi->clk = clk_get(&pdev->dev, clk_name); + rspi->clk = devm_clk_get(&pdev->dev, clk_name); if (IS_ERR(rspi->clk)) { dev_err(&pdev->dev, "cannot get clock\n"); ret = PTR_ERR(rspi->clk); - goto error2; + goto error1; } clk_enable(rspi->clk); @@ -966,36 +958,32 @@ static int rspi_probe(struct platform_device *pdev) master->transfer = rspi_transfer; master->cleanup = rspi_cleanup; - ret = request_irq(irq, rspi_irq, 0, dev_name(&pdev->dev), rspi); + ret = devm_request_irq(&pdev->dev, irq, rspi_irq, 0, + dev_name(&pdev->dev), rspi); if (ret < 0) { dev_err(&pdev->dev, "request_irq error\n"); - goto error3; + goto error1; } rspi->irq = irq; ret = rspi_request_dma(rspi, pdev); if (ret < 0) { dev_err(&pdev->dev, "rspi_request_dma failed.\n"); - goto error4; + goto error2; } ret = spi_register_master(master); if (ret < 0) { dev_err(&pdev->dev, "spi_register_master error.\n"); - goto error4; + goto error2; } dev_info(&pdev->dev, "probed\n"); return 0; -error4: - rspi_release_dma(rspi); - free_irq(irq, rspi); -error3: - clk_put(rspi->clk); error2: - iounmap(rspi->addr); + rspi_release_dma(rspi); error1: spi_master_put(master); From 7ad35442fc07689eea3e6357390ae7c8fd9ef53c Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 27 Nov 2013 02:18:36 +0100 Subject: [PATCH 010/112] spi: sh-msiof: Enable driver compilation with COMPILE_TEST This helps increasing build testing coverage. Signed-off-by: Laurent Pinchart Acked-by: Simon Horman Signed-off-by: Mark Brown --- drivers/spi/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index eb1f1ef5fa2e..51ae940adce2 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -407,7 +407,8 @@ config SPI_SC18IS602 config SPI_SH_MSIOF tristate "SuperH MSIOF SPI controller" - depends on (SUPERH || ARCH_SHMOBILE) && HAVE_CLK + depends on HAVE_CLK + depends on SUPERH || ARCH_SHMOBILE || COMPILE_TEST select SPI_BITBANG help SPI driver for SuperH and SH Mobile MSIOF blocks. From b4dd05de3d6fb93724b27921689fb3e95ba71845 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Thu, 28 Nov 2013 02:39:42 +0100 Subject: [PATCH 011/112] spi: sh-msiof: Use devm_* managed allocators This simplifies error and cleanup code paths. Signed-off-by: Laurent Pinchart Signed-off-by: Mark Brown --- drivers/spi/spi-sh-msiof.c | 39 +++++++++++++++----------------------- 1 file changed, 15 insertions(+), 24 deletions(-) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 86f822a656ef..7f2bb8572e5c 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -635,8 +635,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) master = spi_alloc_master(&pdev->dev, sizeof(struct sh_msiof_spi_priv)); if (master == NULL) { dev_err(&pdev->dev, "failed to allocate spi master\n"); - ret = -ENOMEM; - goto err0; + return -ENOMEM; } p = spi_master_get_devdata(master); @@ -655,32 +654,32 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) init_completion(&p->done); - p->clk = clk_get(&pdev->dev, NULL); + p->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(p->clk)) { dev_err(&pdev->dev, "cannot get clock\n"); ret = PTR_ERR(p->clk); goto err1; } - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); i = platform_get_irq(pdev, 0); - if (!r || i < 0) { - dev_err(&pdev->dev, "cannot get platform resources\n"); + if (i < 0) { + dev_err(&pdev->dev, "cannot get platform IRQ\n"); ret = -ENOENT; - goto err2; - } - p->mapbase = ioremap_nocache(r->start, resource_size(r)); - if (!p->mapbase) { - dev_err(&pdev->dev, "unable to ioremap\n"); - ret = -ENXIO; - goto err2; + goto err1; } - ret = request_irq(i, sh_msiof_spi_irq, 0, - dev_name(&pdev->dev), p); + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + p->mapbase = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(p->mapbase)) { + ret = PTR_ERR(p->mapbase); + goto err1; + } + + ret = devm_request_irq(&pdev->dev, i, sh_msiof_spi_irq, 0, + dev_name(&pdev->dev), p); if (ret) { dev_err(&pdev->dev, "unable to request irq\n"); - goto err3; + goto err1; } p->pdev = pdev; @@ -719,13 +718,8 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) return 0; pm_runtime_disable(&pdev->dev); - err3: - iounmap(p->mapbase); - err2: - clk_put(p->clk); err1: spi_master_put(master); - err0: return ret; } @@ -737,9 +731,6 @@ static int sh_msiof_spi_remove(struct platform_device *pdev) ret = spi_bitbang_stop(&p->bitbang); if (!ret) { pm_runtime_disable(&pdev->dev); - free_irq(platform_get_irq(pdev, 0), p); - iounmap(p->mapbase); - clk_put(p->clk); spi_master_put(p->bitbang.master); } return ret; From 5c32d29f13e9f7b94e0e82bf3ed7a1cf6b0c0dd3 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Thu, 28 Nov 2013 02:39:43 +0100 Subject: [PATCH 012/112] spi: sh-msiof: Convert to clk_prepare/unprepare Get the driver ready for the migration to the common clock framework by calling clk_prepare() and clk_unprepare(). The calls are added in the probe and remove handlers as the clk_enable() and clk_disable() calls are located in atomic context and there's no callback function in non-atomic context that can be used to prepare/unprepare the clock. Signed-off-by: Laurent Pinchart Signed-off-by: Mark Brown --- drivers/spi/spi-sh-msiof.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 7f2bb8572e5c..d96b047afcd2 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -682,6 +682,12 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) goto err1; } + ret = clk_prepare(p->clk); + if (ret < 0) { + dev_err(&pdev->dev, "unable to prepare clock\n"); + goto err1; + } + p->pdev = pdev; pm_runtime_enable(&pdev->dev); @@ -718,6 +724,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) return 0; pm_runtime_disable(&pdev->dev); + clk_unprepare(p->clk); err1: spi_master_put(master); return ret; @@ -731,6 +738,7 @@ static int sh_msiof_spi_remove(struct platform_device *pdev) ret = spi_bitbang_stop(&p->bitbang); if (!ret) { pm_runtime_disable(&pdev->dev); + clk_unprepare(p->clk); spi_master_put(p->bitbang.master); } return ret; From e4d313ff79a8b5622a8c4954ba37c6564fa922c4 Mon Sep 17 00:00:00 2001 From: Takashi Yoshii Date: Mon, 2 Dec 2013 03:19:13 +0900 Subject: [PATCH 013/112] spi: spi-sh-msiof: round up div to fix freq calculation Truncation on integer division in sh_msiof_spi_set_clk_regs() results in insufficient transfer frequency (> max_speed_freq). For example, source 52MHz, required max 6MHz 52/6 = 8.6 --> 8, then 1/8 table selected, and result in 52/8 = 6.5 MHz (>6MHz) Rounding it up is a simple solution. 52/6 = 8.6 --> 9, then 1/16 table selected, and result in 52/16 = 3.25 MHz Signed-off-by: Takashi Yoshii Signed-off-by: Mark Brown --- drivers/spi/spi-sh-msiof.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index c74298cf70e2..ac8795f2e700 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -152,7 +152,7 @@ static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p, size_t k; if (!WARN_ON(!spi_hz || !parent_rate)) - div = parent_rate / spi_hz; + div = DIV_ROUND_UP(parent_rate, spi_hz); /* TODO: make more fine grained */ From 50a7799829835120950520231797642e19d4152f Mon Sep 17 00:00:00 2001 From: Takashi Yoshii Date: Mon, 2 Dec 2013 03:19:15 +0900 Subject: [PATCH 014/112] spi: spi-sh-msiof: set hi/low Active for HW CS Set hardware CS(CS control function on MSIOF <-> GPIO CS) polarity according to SPI_CS_HIGH flag on spi->mode. Signed-off-by: Takashi Yoshii Signed-off-by: Mark Brown --- drivers/spi/spi-sh-msiof.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index d96b047afcd2..a0c3e54b0003 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -169,7 +169,7 @@ static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p, static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p, u32 cpol, u32 cpha, - u32 tx_hi_z, u32 lsb_first) + u32 tx_hi_z, u32 lsb_first, u32 cs_high) { u32 tmp; int edge; @@ -182,8 +182,12 @@ static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p, * 1 1 11 11 1 1 */ sh_msiof_write(p, FCTR, 0); - sh_msiof_write(p, TMDR1, 0xe2000005 | (lsb_first << 24)); - sh_msiof_write(p, RMDR1, 0x22000005 | (lsb_first << 24)); + + tmp = 0; + tmp |= !cs_high << 25; + tmp |= lsb_first << 24; + sh_msiof_write(p, TMDR1, 0xe0000005 | tmp); + sh_msiof_write(p, RMDR1, 0x20000005 | tmp); tmp = 0xa0000000; tmp |= cpol << 30; /* TSCKIZ */ @@ -417,7 +421,8 @@ static void sh_msiof_spi_chipselect(struct spi_device *spi, int is_on) sh_msiof_spi_set_pin_regs(p, !!(spi->mode & SPI_CPOL), !!(spi->mode & SPI_CPHA), !!(spi->mode & SPI_3WIRE), - !!(spi->mode & SPI_LSB_FIRST)); + !!(spi->mode & SPI_LSB_FIRST), + !!(spi->mode & SPI_CS_HIGH)); } /* use spi->controller data for CS (same strategy as spi_gpio) */ From 84acfd4340f9c7cef7286eb9d539e78fb3a15292 Mon Sep 17 00:00:00 2001 From: Michal Nazarewicz Date: Fri, 29 Nov 2013 18:09:07 +0100 Subject: [PATCH 015/112] spi: omap-100k: remove pointless _remove function Commit [8074cf06: use devm_spi_register_master()] removed the last bit of omap1_spi100k_remove function that had side effects. After call to spi_unregister_master was removed, the function consisted of: 2. call to platform_get_drvdata whose return value was only used in: 2. call to spi_master_get_devdata whose return value was not used, 3. an if statement checking if zero was not zero, and 4. call to platform_get_resource whose return value was not used. Ah, yes, and of course, final return 0. ;) Since omap1_spi100k_remove no longer does anything, it can be safely removed. Signed-off-by: Michal Nazarewicz Signed-off-by: Mark Brown --- drivers/spi/spi-omap-100k.c | 20 -------------------- 1 file changed, 20 deletions(-) diff --git a/drivers/spi/spi-omap-100k.c b/drivers/spi/spi-omap-100k.c index b6ed82beb01d..0d32054bfc0d 100644 --- a/drivers/spi/spi-omap-100k.c +++ b/drivers/spi/spi-omap-100k.c @@ -470,31 +470,12 @@ err: return status; } -static int omap1_spi100k_remove(struct platform_device *pdev) -{ - struct spi_master *master; - struct omap1_spi100k *spi100k; - struct resource *r; - int status = 0; - - master = platform_get_drvdata(pdev); - spi100k = spi_master_get_devdata(master); - - if (status != 0) - return status; - - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - return 0; -} - static struct platform_driver omap1_spi100k_driver = { .driver = { .name = "omap1_spi100k", .owner = THIS_MODULE, }, .probe = omap1_spi100k_probe, - .remove = omap1_spi100k_remove, }; module_platform_driver(omap1_spi100k_driver); @@ -502,4 +483,3 @@ module_platform_driver(omap1_spi100k_driver); MODULE_DESCRIPTION("OMAP7xx SPI 100k controller driver"); MODULE_AUTHOR("Fabrice Crohas "); MODULE_LICENSE("GPL"); - From 9a21e4770ac828a49e722897c3c0250f630f4a48 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Tue, 3 Dec 2013 08:25:19 +0900 Subject: [PATCH 016/112] spi: remove DEFINE_PCI_DEVICE_TABLE macro Don't use DEFINE_PCI_DEVICE_TABLE macro, because this macro is not preferred. Signed-off-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-dw-pci.c | 2 +- drivers/spi/spi-pxa2xx-pci.c | 2 +- drivers/spi/spi-topcliff-pch.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c index 66fa9955ea14..f7be4be59353 100644 --- a/drivers/spi/spi-dw-pci.c +++ b/drivers/spi/spi-dw-pci.c @@ -148,7 +148,7 @@ static int spi_resume(struct pci_dev *pdev) #define spi_resume NULL #endif -static DEFINE_PCI_DEVICE_TABLE(pci_ids) = { +static const struct pci_device_id pci_ids[] = { /* Intel MID platform SPI controller 0 */ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) }, {}, diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c index 74bc18775658..3f006d3ed2a8 100644 --- a/drivers/spi/spi-pxa2xx-pci.c +++ b/drivers/spi/spi-pxa2xx-pci.c @@ -62,7 +62,7 @@ static void ce4100_spi_remove(struct pci_dev *dev) platform_device_unregister(pdev); } -static DEFINE_PCI_DEVICE_TABLE(ce4100_spi_devices) = { +static const struct pci_device_id ce4100_spi_devices[] = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e6a) }, { }, }; diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 446131308acb..338fc11913c1 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -217,7 +217,7 @@ struct pch_pd_dev_save { struct pch_spi_board_data *board_dat; }; -static DEFINE_PCI_DEVICE_TABLE(pch_spi_pcidev_id) = { +static const struct pci_device_id pch_spi_pcidev_id[] = { { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_GE_SPI), 1, }, { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_SPI), 2, }, { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_SPI), 1, }, From 9f87d6f26b2fcedfc3d1ec6c65ce568b21546ee2 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Wed, 4 Dec 2013 14:07:51 +0900 Subject: [PATCH 017/112] spi: atmel: Use devm_*() functions Use devm_*() functions to make cleanup paths simpler. Signed-off-by: Jingoo Han Nicolas Ferre Signed-off-by: Mark Brown --- drivers/spi/spi-atmel.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index 273db0beb2b8..57fa73876223 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -1510,7 +1510,7 @@ static int atmel_spi_probe(struct platform_device *pdev) if (irq < 0) return irq; - clk = clk_get(&pdev->dev, "spi_clk"); + clk = devm_clk_get(&pdev->dev, "spi_clk"); if (IS_ERR(clk)) return PTR_ERR(clk); @@ -1570,14 +1570,14 @@ static int atmel_spi_probe(struct platform_device *pdev) dev_info(&pdev->dev, "Atmel SPI Controller using PIO only\n"); if (as->use_pdc) { - ret = request_irq(irq, atmel_spi_pdc_interrupt, 0, - dev_name(&pdev->dev), master); + ret = devm_request_irq(&pdev->dev, irq, atmel_spi_pdc_interrupt, + 0, dev_name(&pdev->dev), master); } else { tasklet_init(&as->tasklet, atmel_spi_tasklet_func, (unsigned long)master); - ret = request_irq(irq, atmel_spi_pio_interrupt, 0, - dev_name(&pdev->dev), master); + ret = devm_request_irq(&pdev->dev, irq, atmel_spi_pio_interrupt, + 0, dev_name(&pdev->dev), master); } if (ret) goto out_unmap_regs; @@ -1603,7 +1603,7 @@ static int atmel_spi_probe(struct platform_device *pdev) dev_info(&pdev->dev, "Atmel SPI Controller at 0x%08lx (irq %d)\n", (unsigned long)regs->start, irq); - ret = spi_register_master(master); + ret = devm_spi_register_master(&pdev->dev, master); if (ret) goto out_free_dma; @@ -1617,7 +1617,6 @@ out_free_dma: spi_writel(as, CR, SPI_BIT(SWRST)); /* AT91SAM9263 Rev B workaround */ clk_disable_unprepare(clk); out_free_irq: - free_irq(irq, master); out_unmap_regs: out_free_buffer: if (!as->use_pdc) @@ -1625,7 +1624,6 @@ out_free_buffer: dma_free_coherent(&pdev->dev, BUFFER_SIZE, as->buffer, as->buffer_dma); out_free: - clk_put(clk); spi_master_put(master); return ret; } @@ -1668,10 +1666,6 @@ static int atmel_spi_remove(struct platform_device *pdev) as->buffer_dma); clk_disable_unprepare(as->clk); - clk_put(as->clk); - free_irq(as->irq, master); - - spi_unregister_master(master); return 0; } From 9a3ced19d8da908234fe9879ee1c0609c8ed21e8 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Wed, 4 Dec 2013 14:10:10 +0900 Subject: [PATCH 018/112] spi: coldfire-qspi: Use devm_*() functions Use devm_*() functions to make cleanup paths simpler. Signed-off-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-coldfire-qspi.c | 47 ++++++++++----------------------- 1 file changed, 14 insertions(+), 33 deletions(-) diff --git a/drivers/spi/spi-coldfire-qspi.c b/drivers/spi/spi-coldfire-qspi.c index cc5b75d10c38..9ee81a4c7351 100644 --- a/drivers/spi/spi-coldfire-qspi.c +++ b/drivers/spi/spi-coldfire-qspi.c @@ -403,38 +403,31 @@ static int mcfqspi_probe(struct platform_device *pdev) goto fail0; } - if (!request_mem_region(res->start, resource_size(res), pdev->name)) { - dev_dbg(&pdev->dev, "request_mem_region failed\n"); - status = -EBUSY; + mcfqspi->iobase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(mcfqspi->iobase)) { + status = PTR_ERR(mcfqspi->iobase); goto fail0; } - mcfqspi->iobase = ioremap(res->start, resource_size(res)); - if (!mcfqspi->iobase) { - dev_dbg(&pdev->dev, "ioremap failed\n"); - status = -ENOMEM; - goto fail1; - } - mcfqspi->irq = platform_get_irq(pdev, 0); if (mcfqspi->irq < 0) { dev_dbg(&pdev->dev, "platform_get_irq failed\n"); status = -ENXIO; - goto fail2; + goto fail0; } - status = request_irq(mcfqspi->irq, mcfqspi_irq_handler, 0, - pdev->name, mcfqspi); + status = devm_request_irq(&pdev->dev, mcfqspi->irq, mcfqspi_irq_handler, + 0, pdev->name, mcfqspi); if (status) { dev_dbg(&pdev->dev, "request_irq failed\n"); - goto fail2; + goto fail0; } - mcfqspi->clk = clk_get(&pdev->dev, "qspi_clk"); + mcfqspi->clk = devm_clk_get(&pdev->dev, "qspi_clk"); if (IS_ERR(mcfqspi->clk)) { dev_dbg(&pdev->dev, "clk_get failed\n"); status = PTR_ERR(mcfqspi->clk); - goto fail3; + goto fail0; } clk_enable(mcfqspi->clk); @@ -445,7 +438,7 @@ static int mcfqspi_probe(struct platform_device *pdev) status = mcfqspi_cs_setup(mcfqspi); if (status) { dev_dbg(&pdev->dev, "error initializing cs_control\n"); - goto fail4; + goto fail1; } init_waitqueue_head(&mcfqspi->waitq); @@ -459,10 +452,10 @@ static int mcfqspi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, master); - status = spi_register_master(master); + status = devm_spi_register_master(&pdev->dev, master); if (status) { dev_dbg(&pdev->dev, "spi_register_master failed\n"); - goto fail5; + goto fail2; } pm_runtime_enable(mcfqspi->dev); @@ -470,17 +463,10 @@ static int mcfqspi_probe(struct platform_device *pdev) return 0; -fail5: - mcfqspi_cs_teardown(mcfqspi); -fail4: - clk_disable(mcfqspi->clk); - clk_put(mcfqspi->clk); -fail3: - free_irq(mcfqspi->irq, mcfqspi); fail2: - iounmap(mcfqspi->iobase); + mcfqspi_cs_teardown(mcfqspi); fail1: - release_mem_region(res->start, resource_size(res)); + clk_disable(mcfqspi->clk); fail0: spi_master_put(master); @@ -501,11 +487,6 @@ static int mcfqspi_remove(struct platform_device *pdev) mcfqspi_cs_teardown(mcfqspi); clk_disable(mcfqspi->clk); - clk_put(mcfqspi->clk); - free_irq(mcfqspi->irq, mcfqspi); - iounmap(mcfqspi->iobase); - release_mem_region(res->start, resource_size(res)); - spi_unregister_master(master); return 0; } From 4cc16085c80d3363315ad183ad72654993766a0f Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Wed, 4 Dec 2013 14:15:23 +0900 Subject: [PATCH 019/112] spi: xcomm: Use devm_spi_register_master() Use devm_spi_register_master() to make cleanup paths simpler, and remove unnecessary remove(). Signed-off-by: Jingoo Han Acked-by: Lars-Peter Clausen Signed-off-by: Mark Brown --- drivers/spi/spi-xcomm.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/drivers/spi/spi-xcomm.c b/drivers/spi/spi-xcomm.c index 4258c712ad3c..24c40b13dab1 100644 --- a/drivers/spi/spi-xcomm.c +++ b/drivers/spi/spi-xcomm.c @@ -231,22 +231,13 @@ static int spi_xcomm_probe(struct i2c_client *i2c, master->dev.of_node = i2c->dev.of_node; i2c_set_clientdata(i2c, master); - ret = spi_register_master(master); + ret = devm_spi_register_master(&i2c->dev, master); if (ret < 0) spi_master_put(master); return ret; } -static int spi_xcomm_remove(struct i2c_client *i2c) -{ - struct spi_master *master = i2c_get_clientdata(i2c); - - spi_unregister_master(master); - - return 0; -} - static const struct i2c_device_id spi_xcomm_ids[] = { { "spi-xcomm" }, { }, @@ -259,7 +250,6 @@ static struct i2c_driver spi_xcomm_driver = { }, .id_table = spi_xcomm_ids, .probe = spi_xcomm_probe, - .remove = spi_xcomm_remove, }; module_i2c_driver(spi_xcomm_driver); From 15e0964dc2a097de3cf518badf2237b6b6adf7fe Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Wed, 4 Dec 2013 14:14:30 +0900 Subject: [PATCH 020/112] spi: sc18is602: Use devm_spi_register_master() Use devm_spi_register_master() to make cleanup paths simpler, and remove unnecessary remove(). Signed-off-by: Jingoo Han Acked-by: Guenter Roeck Signed-off-by: Mark Brown --- drivers/spi/spi-sc18is602.c | 13 +------------ 1 file changed, 1 insertion(+), 12 deletions(-) diff --git a/drivers/spi/spi-sc18is602.c b/drivers/spi/spi-sc18is602.c index 9eda21d739c6..c1a01d1ac315 100644 --- a/drivers/spi/spi-sc18is602.c +++ b/drivers/spi/spi-sc18is602.c @@ -319,7 +319,7 @@ static int sc18is602_probe(struct i2c_client *client, master->transfer_one_message = sc18is602_transfer_one; master->dev.of_node = np; - error = spi_register_master(master); + error = devm_spi_register_master(dev, master); if (error) goto error_reg; @@ -330,16 +330,6 @@ error_reg: return error; } -static int sc18is602_remove(struct i2c_client *client) -{ - struct sc18is602 *hw = i2c_get_clientdata(client); - struct spi_master *master = hw->master; - - spi_unregister_master(master); - - return 0; -} - static const struct i2c_device_id sc18is602_id[] = { { "sc18is602", sc18is602 }, { "sc18is602b", sc18is602b }, @@ -353,7 +343,6 @@ static struct i2c_driver sc18is602_driver = { .name = "sc18is602", }, .probe = sc18is602_probe, - .remove = sc18is602_remove, .id_table = sc18is602_id, }; From 999b6e932bf7238a0d1eb35d0b3d6eac673b8777 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Wed, 4 Dec 2013 14:11:56 +0900 Subject: [PATCH 021/112] spi: falcon: Use devm_spi_register_master() Use devm_spi_register_master() to make cleanup paths simpler, and remove unnecessary remove(). Signed-off-by: Jingoo Han Acked-by: Thomas Langer Signed-off-by: Mark Brown --- drivers/spi/spi-falcon.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/drivers/spi/spi-falcon.c b/drivers/spi/spi-falcon.c index c7a74f0ef892..dd5bd468e962 100644 --- a/drivers/spi/spi-falcon.c +++ b/drivers/spi/spi-falcon.c @@ -433,21 +433,12 @@ static int falcon_sflash_probe(struct platform_device *pdev) platform_set_drvdata(pdev, priv); - ret = spi_register_master(master); + ret = devm_spi_register_master(&pdev->dev, master); if (ret) spi_master_put(master); return ret; } -static int falcon_sflash_remove(struct platform_device *pdev) -{ - struct falcon_sflash *priv = platform_get_drvdata(pdev); - - spi_unregister_master(priv->master); - - return 0; -} - static const struct of_device_id falcon_sflash_match[] = { { .compatible = "lantiq,sflash-falcon" }, {}, @@ -456,7 +447,6 @@ MODULE_DEVICE_TABLE(of, falcon_sflash_match); static struct platform_driver falcon_sflash_driver = { .probe = falcon_sflash_probe, - .remove = falcon_sflash_remove, .driver = { .name = DRV_NAME, .owner = THIS_MODULE, From 142168eba9dc5c20538a67049ad53c49bc6f8336 Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Sat, 30 Nov 2013 12:42:06 +0100 Subject: [PATCH 022/112] spi: bcm63xx-hsspi: add bcm63xx HSSPI driver Add a driver for the High Speed SPI controller found on newer BCM63XX SoCs. It does feature some new modes like 3-wire or dual spi, but neither of it is currently implemented. Signed-off-by: Jonas Gorski Signed-off-by: Mark Brown --- drivers/spi/Kconfig | 7 + drivers/spi/Makefile | 1 + drivers/spi/spi-bcm63xx-hsspi.c | 484 ++++++++++++++++++++++++++++++++ 3 files changed, 492 insertions(+) create mode 100644 drivers/spi/spi-bcm63xx-hsspi.c diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index eb1f1ef5fa2e..62ce2a9ec612 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -118,6 +118,13 @@ config SPI_BCM63XX help Enable support for the SPI controller on the Broadcom BCM63xx SoCs. +config SPI_BCM63XX_HSSPI + tristate "Broadcom BCM63XX HS SPI controller driver" + depends on BCM63XX || COMPILE_TEST + help + This enables support for the High Speed SPI controller present on + newer Broadcom BCM63XX SoCs. + config SPI_BITBANG tristate "Utilities for Bitbanging SPI masters" help diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index ab8d8644af0e..95af48d2d360 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_SPI_ATH79) += spi-ath79.o obj-$(CONFIG_SPI_AU1550) += spi-au1550.o obj-$(CONFIG_SPI_BCM2835) += spi-bcm2835.o obj-$(CONFIG_SPI_BCM63XX) += spi-bcm63xx.o +obj-$(CONFIG_SPI_BCM63XX_HSSPI) += spi-bcm63xx-hsspi.o obj-$(CONFIG_SPI_BFIN5XX) += spi-bfin5xx.o obj-$(CONFIG_SPI_BFIN_V3) += spi-bfin-v3.o obj-$(CONFIG_SPI_BFIN_SPORT) += spi-bfin-sport.o diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c new file mode 100644 index 000000000000..bc8d848d33b7 --- /dev/null +++ b/drivers/spi/spi-bcm63xx-hsspi.c @@ -0,0 +1,484 @@ +/* + * Broadcom BCM63XX High Speed SPI Controller driver + * + * Copyright 2000-2010 Broadcom Corporation + * Copyright 2012-2013 Jonas Gorski + * + * Licensed under the GNU/GPL. See COPYING for details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define HSSPI_GLOBAL_CTRL_REG 0x0 +#define GLOBAL_CTRL_CS_POLARITY_SHIFT 0 +#define GLOBAL_CTRL_CS_POLARITY_MASK 0x000000ff +#define GLOBAL_CTRL_PLL_CLK_CTRL_SHIFT 8 +#define GLOBAL_CTRL_PLL_CLK_CTRL_MASK 0x0000ff00 +#define GLOBAL_CTRL_CLK_GATE_SSOFF BIT(16) +#define GLOBAL_CTRL_CLK_POLARITY BIT(17) +#define GLOBAL_CTRL_MOSI_IDLE BIT(18) + +#define HSSPI_GLOBAL_EXT_TRIGGER_REG 0x4 + +#define HSSPI_INT_STATUS_REG 0x8 +#define HSSPI_INT_STATUS_MASKED_REG 0xc +#define HSSPI_INT_MASK_REG 0x10 + +#define HSSPI_PINGx_CMD_DONE(i) BIT((i * 8) + 0) +#define HSSPI_PINGx_RX_OVER(i) BIT((i * 8) + 1) +#define HSSPI_PINGx_TX_UNDER(i) BIT((i * 8) + 2) +#define HSSPI_PINGx_POLL_TIMEOUT(i) BIT((i * 8) + 3) +#define HSSPI_PINGx_CTRL_INVAL(i) BIT((i * 8) + 4) + +#define HSSPI_INT_CLEAR_ALL 0xff001f1f + +#define HSSPI_PINGPONG_COMMAND_REG(x) (0x80 + (x) * 0x40) +#define PINGPONG_CMD_COMMAND_MASK 0xf +#define PINGPONG_COMMAND_NOOP 0 +#define PINGPONG_COMMAND_START_NOW 1 +#define PINGPONG_COMMAND_START_TRIGGER 2 +#define PINGPONG_COMMAND_HALT 3 +#define PINGPONG_COMMAND_FLUSH 4 +#define PINGPONG_CMD_PROFILE_SHIFT 8 +#define PINGPONG_CMD_SS_SHIFT 12 + +#define HSSPI_PINGPONG_STATUS_REG(x) (0x84 + (x) * 0x40) + +#define HSSPI_PROFILE_CLK_CTRL_REG(x) (0x100 + (x) * 0x20) +#define CLK_CTRL_FREQ_CTRL_MASK 0x0000ffff +#define CLK_CTRL_SPI_CLK_2X_SEL BIT(14) +#define CLK_CTRL_ACCUM_RST_ON_LOOP BIT(15) + +#define HSSPI_PROFILE_SIGNAL_CTRL_REG(x) (0x104 + (x) * 0x20) +#define SIGNAL_CTRL_LATCH_RISING BIT(12) +#define SIGNAL_CTRL_LAUNCH_RISING BIT(13) +#define SIGNAL_CTRL_ASYNC_INPUT_PATH BIT(16) + +#define HSSPI_PROFILE_MODE_CTRL_REG(x) (0x108 + (x) * 0x20) +#define MODE_CTRL_MULTIDATA_RD_STRT_SHIFT 8 +#define MODE_CTRL_MULTIDATA_WR_STRT_SHIFT 12 +#define MODE_CTRL_MULTIDATA_RD_SIZE_SHIFT 16 +#define MODE_CTRL_MULTIDATA_WR_SIZE_SHIFT 18 +#define MODE_CTRL_MODE_3WIRE BIT(20) +#define MODE_CTRL_PREPENDBYTE_CNT_SHIFT 24 + +#define HSSPI_FIFO_REG(x) (0x200 + (x) * 0x200) + + +#define HSSPI_OP_CODE_SHIFT 13 +#define HSSPI_OP_SLEEP (0 << HSSPI_OP_CODE_SHIFT) +#define HSSPI_OP_READ_WRITE (1 << HSSPI_OP_CODE_SHIFT) +#define HSSPI_OP_WRITE (2 << HSSPI_OP_CODE_SHIFT) +#define HSSPI_OP_READ (3 << HSSPI_OP_CODE_SHIFT) +#define HSSPI_OP_SETIRQ (4 << HSSPI_OP_CODE_SHIFT) + +#define HSSPI_BUFFER_LEN 512 +#define HSSPI_OPCODE_LEN 2 + +#define HSSPI_MAX_PREPEND_LEN 15 + +#define HSSPI_MAX_SYNC_CLOCK 30000000 + +#define HSSPI_BUS_NUM 1 /* 0 is legacy SPI */ + +struct bcm63xx_hsspi { + struct completion done; + struct mutex bus_mutex; + + struct platform_device *pdev; + struct clk *clk; + void __iomem *regs; + u8 __iomem *fifo; + + u32 speed_hz; + u8 cs_polarity; +}; + +static void bcm63xx_hsspi_set_cs(struct bcm63xx_hsspi *bs, unsigned cs, + bool active) +{ + u32 reg; + + mutex_lock(&bs->bus_mutex); + reg = __raw_readl(bs->regs + HSSPI_GLOBAL_CTRL_REG); + + reg &= ~BIT(cs); + if (active == !(bs->cs_polarity & BIT(cs))) + reg |= BIT(cs); + + __raw_writel(reg, bs->regs + HSSPI_GLOBAL_CTRL_REG); + mutex_unlock(&bs->bus_mutex); +} + +static void bcm63xx_hsspi_set_clk(struct bcm63xx_hsspi *bs, + struct spi_device *spi, int hz) +{ + unsigned profile = spi->chip_select; + u32 reg; + + reg = DIV_ROUND_UP(2048, DIV_ROUND_UP(bs->speed_hz, hz)); + __raw_writel(CLK_CTRL_ACCUM_RST_ON_LOOP | reg, + bs->regs + HSSPI_PROFILE_CLK_CTRL_REG(profile)); + + reg = __raw_readl(bs->regs + HSSPI_PROFILE_SIGNAL_CTRL_REG(profile)); + if (hz > HSSPI_MAX_SYNC_CLOCK) + reg |= SIGNAL_CTRL_ASYNC_INPUT_PATH; + else + reg &= ~SIGNAL_CTRL_ASYNC_INPUT_PATH; + __raw_writel(reg, bs->regs + HSSPI_PROFILE_SIGNAL_CTRL_REG(profile)); + + mutex_lock(&bs->bus_mutex); + /* setup clock polarity */ + reg = __raw_readl(bs->regs + HSSPI_GLOBAL_CTRL_REG); + reg &= ~GLOBAL_CTRL_CLK_POLARITY; + if (spi->mode & SPI_CPOL) + reg |= GLOBAL_CTRL_CLK_POLARITY; + __raw_writel(reg, bs->regs + HSSPI_GLOBAL_CTRL_REG); + mutex_unlock(&bs->bus_mutex); +} + +static int bcm63xx_hsspi_do_txrx(struct spi_device *spi, struct spi_transfer *t) +{ + struct bcm63xx_hsspi *bs = spi_master_get_devdata(spi->master); + unsigned chip_select = spi->chip_select; + u16 opcode = 0; + int pending = t->len; + int step_size = HSSPI_BUFFER_LEN; + const u8 *tx = t->tx_buf; + u8 *rx = t->rx_buf; + + bcm63xx_hsspi_set_clk(bs, spi, t->speed_hz); + bcm63xx_hsspi_set_cs(bs, spi->chip_select, true); + + if (tx && rx) + opcode = HSSPI_OP_READ_WRITE; + else if (tx) + opcode = HSSPI_OP_WRITE; + else if (rx) + opcode = HSSPI_OP_READ; + + if (opcode != HSSPI_OP_READ) + step_size -= HSSPI_OPCODE_LEN; + + __raw_writel(0 << MODE_CTRL_PREPENDBYTE_CNT_SHIFT | + 2 << MODE_CTRL_MULTIDATA_WR_STRT_SHIFT | + 2 << MODE_CTRL_MULTIDATA_RD_STRT_SHIFT | 0xff, + bs->regs + HSSPI_PROFILE_MODE_CTRL_REG(chip_select)); + + while (pending > 0) { + int curr_step = min_t(int, step_size, pending); + + init_completion(&bs->done); + if (tx) { + memcpy_toio(bs->fifo + HSSPI_OPCODE_LEN, tx, curr_step); + tx += curr_step; + } + + __raw_writew(opcode | curr_step, bs->fifo); + + /* enable interrupt */ + __raw_writel(HSSPI_PINGx_CMD_DONE(0), + bs->regs + HSSPI_INT_MASK_REG); + + /* start the transfer */ + __raw_writel(!chip_select << PINGPONG_CMD_SS_SHIFT | + chip_select << PINGPONG_CMD_PROFILE_SHIFT | + PINGPONG_COMMAND_START_NOW, + bs->regs + HSSPI_PINGPONG_COMMAND_REG(0)); + + if (wait_for_completion_timeout(&bs->done, HZ) == 0) { + dev_err(&bs->pdev->dev, "transfer timed out!\n"); + return -ETIMEDOUT; + } + + if (rx) { + memcpy_fromio(rx, bs->fifo, curr_step); + rx += curr_step; + } + + pending -= curr_step; + } + + return 0; +} + +static int bcm63xx_hsspi_setup(struct spi_device *spi) +{ + struct bcm63xx_hsspi *bs = spi_master_get_devdata(spi->master); + u32 reg; + + reg = __raw_readl(bs->regs + + HSSPI_PROFILE_SIGNAL_CTRL_REG(spi->chip_select)); + reg &= ~(SIGNAL_CTRL_LAUNCH_RISING | SIGNAL_CTRL_LATCH_RISING); + if (spi->mode & SPI_CPHA) + reg |= SIGNAL_CTRL_LAUNCH_RISING; + else + reg |= SIGNAL_CTRL_LATCH_RISING; + __raw_writel(reg, bs->regs + + HSSPI_PROFILE_SIGNAL_CTRL_REG(spi->chip_select)); + + mutex_lock(&bs->bus_mutex); + reg = __raw_readl(bs->regs + HSSPI_GLOBAL_CTRL_REG); + + /* only change actual polarities if there is no transfer */ + if ((reg & GLOBAL_CTRL_CS_POLARITY_MASK) == bs->cs_polarity) { + if (spi->mode & SPI_CS_HIGH) + reg |= BIT(spi->chip_select); + else + reg &= ~BIT(spi->chip_select); + __raw_writel(reg, bs->regs + HSSPI_GLOBAL_CTRL_REG); + } + + if (spi->mode & SPI_CS_HIGH) + bs->cs_polarity |= BIT(spi->chip_select); + else + bs->cs_polarity &= ~BIT(spi->chip_select); + + mutex_unlock(&bs->bus_mutex); + + return 0; +} + +static int bcm63xx_hsspi_transfer_one(struct spi_master *master, + struct spi_message *msg) +{ + struct bcm63xx_hsspi *bs = spi_master_get_devdata(master); + struct spi_transfer *t; + struct spi_device *spi = msg->spi; + int status = -EINVAL; + int dummy_cs; + u32 reg; + + /* This controller does not support keeping CS active during idle. + * To work around this, we use the following ugly hack: + * + * a. Invert the target chip select's polarity so it will be active. + * b. Select a "dummy" chip select to use as the hardware target. + * c. Invert the dummy chip select's polarity so it will be inactive + * during the actual transfers. + * d. Tell the hardware to send to the dummy chip select. Thanks to + * the multiplexed nature of SPI the actual target will receive + * the transfer and we see its response. + * + * e. At the end restore the polarities again to their default values. + */ + + dummy_cs = !spi->chip_select; + bcm63xx_hsspi_set_cs(bs, dummy_cs, true); + + list_for_each_entry(t, &msg->transfers, transfer_list) { + status = bcm63xx_hsspi_do_txrx(spi, t); + if (status) + break; + + msg->actual_length += t->len; + + if (t->delay_usecs) + udelay(t->delay_usecs); + + if (t->cs_change) + bcm63xx_hsspi_set_cs(bs, spi->chip_select, false); + } + + mutex_lock(&bs->bus_mutex); + reg = __raw_readl(bs->regs + HSSPI_GLOBAL_CTRL_REG); + reg &= ~GLOBAL_CTRL_CS_POLARITY_MASK; + reg |= bs->cs_polarity; + __raw_writel(reg, bs->regs + HSSPI_GLOBAL_CTRL_REG); + mutex_unlock(&bs->bus_mutex); + + msg->status = status; + spi_finalize_current_message(master); + + return 0; +} + +static irqreturn_t bcm63xx_hsspi_interrupt(int irq, void *dev_id) +{ + struct bcm63xx_hsspi *bs = (struct bcm63xx_hsspi *)dev_id; + + if (__raw_readl(bs->regs + HSSPI_INT_STATUS_MASKED_REG) == 0) + return IRQ_NONE; + + __raw_writel(HSSPI_INT_CLEAR_ALL, bs->regs + HSSPI_INT_STATUS_REG); + __raw_writel(0, bs->regs + HSSPI_INT_MASK_REG); + + complete(&bs->done); + + return IRQ_HANDLED; +} + +static int bcm63xx_hsspi_probe(struct platform_device *pdev) +{ + struct spi_master *master; + struct bcm63xx_hsspi *bs; + struct resource *res_mem; + void __iomem *regs; + struct device *dev = &pdev->dev; + struct clk *clk; + int irq, ret; + u32 reg, rate; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(dev, "no irq\n"); + return -ENXIO; + } + + res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + regs = devm_request_and_ioremap(dev, res_mem); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + clk = clk_get(dev, "hsspi"); + + if (IS_ERR(clk)) + return PTR_ERR(clk); + + rate = clk_get_rate(clk); + if (!rate) { + ret = -EINVAL; + goto out_put_clk; + } + + clk_prepare_enable(clk); + + master = spi_alloc_master(&pdev->dev, sizeof(*bs)); + if (!master) { + ret = -ENOMEM; + goto out_disable_clk; + } + + bs = spi_master_get_devdata(master); + bs->pdev = pdev; + bs->clk = clk; + bs->regs = regs; + bs->speed_hz = rate; + bs->fifo = (u8 __iomem *)(bs->regs + HSSPI_FIFO_REG(0)); + + mutex_init(&bs->bus_mutex); + + master->bus_num = HSSPI_BUS_NUM; + master->num_chipselect = 8; + master->setup = bcm63xx_hsspi_setup; + master->transfer_one_message = bcm63xx_hsspi_transfer_one; + master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; + master->bits_per_word_mask = SPI_BPW_MASK(8); + master->auto_runtime_pm = true; + + platform_set_drvdata(pdev, master); + + /* Initialize the hardware */ + __raw_writel(0, bs->regs + HSSPI_INT_MASK_REG); + + /* clean up any pending interrupts */ + __raw_writel(HSSPI_INT_CLEAR_ALL, bs->regs + HSSPI_INT_STATUS_REG); + + /* read out default CS polarities */ + reg = __raw_readl(bs->regs + HSSPI_GLOBAL_CTRL_REG); + bs->cs_polarity = reg & GLOBAL_CTRL_CS_POLARITY_MASK; + __raw_writel(reg | GLOBAL_CTRL_CLK_GATE_SSOFF, + bs->regs + HSSPI_GLOBAL_CTRL_REG); + + ret = devm_request_irq(dev, irq, bcm63xx_hsspi_interrupt, IRQF_SHARED, + pdev->name, bs); + + if (ret) + goto out_put_master; + + /* register and we are done */ + ret = spi_register_master(master); + if (ret) + goto out_put_master; + + return 0; + +out_put_master: + spi_master_put(master); +out_disable_clk: + clk_disable_unprepare(clk); +out_put_clk: + clk_put(clk); + + return ret; +} + + +static int bcm63xx_hsspi_remove(struct platform_device *pdev) +{ + struct spi_master *master = platform_get_drvdata(pdev); + struct bcm63xx_hsspi *bs = spi_master_get_devdata(master); + + spi_unregister_master(master); + + /* reset the hardware and block queue progress */ + __raw_writel(0, bs->regs + HSSPI_INT_MASK_REG); + clk_disable_unprepare(bs->clk); + clk_put(bs->clk); + + return 0; +} + +#ifdef CONFIG_PM +static int bcm63xx_hsspi_suspend(struct device *dev) +{ + struct spi_master *master = dev_get_drvdata(dev); + struct bcm63xx_hsspi *bs = spi_master_get_devdata(master); + + spi_master_suspend(master); + clk_disable(bs->clk); + + return 0; +} + +static int bcm63xx_hsspi_resume(struct device *dev) +{ + struct spi_master *master = dev_get_drvdata(dev); + struct bcm63xx_hsspi *bs = spi_master_get_devdata(master); + + clk_enable(bs->clk); + spi_master_resume(master); + + return 0; +} + +static const struct dev_pm_ops bcm63xx_hsspi_pm_ops = { + .suspend = bcm63xx_hsspi_suspend, + .resume = bcm63xx_hsspi_resume, +}; + +#define BCM63XX_HSSPI_PM_OPS (&bcm63xx_hsspi_pm_ops) +#else +#define BCM63XX_HSSPI_PM_OPS NULL +#endif + + + +static struct platform_driver bcm63xx_hsspi_driver = { + .driver = { + .name = "bcm63xx-hsspi", + .owner = THIS_MODULE, + .pm = BCM63XX_HSSPI_PM_OPS, + }, + .probe = bcm63xx_hsspi_probe, + .remove = bcm63xx_hsspi_remove, +}; + +module_platform_driver(bcm63xx_hsspi_driver); + +MODULE_ALIAS("platform:bcm63xx_hsspi"); +MODULE_DESCRIPTION("Broadcom BCM63xx High Speed SPI Controller driver"); +MODULE_AUTHOR("Jonas Gorski "); +MODULE_LICENSE("GPL"); From f885135ab6047dd159067d15c9a5de1a67de4e27 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Sat, 7 Dec 2013 14:00:40 +0800 Subject: [PATCH 023/112] spi: coldfire-qspi: remove redundant return value check of platform_get_resource() Remove unneeded error handling on the result of a call to platform_get_resource() when the value is passed to devm_ioremap_resource(). Signed-off-by: Wei Yongjun Signed-off-by: Mark Brown --- drivers/spi/spi-coldfire-qspi.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/spi/spi-coldfire-qspi.c b/drivers/spi/spi-coldfire-qspi.c index 9ee81a4c7351..cabed8f9119e 100644 --- a/drivers/spi/spi-coldfire-qspi.c +++ b/drivers/spi/spi-coldfire-qspi.c @@ -397,12 +397,6 @@ static int mcfqspi_probe(struct platform_device *pdev) mcfqspi = spi_master_get_devdata(master); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_dbg(&pdev->dev, "platform_get_resource failed\n"); - status = -ENXIO; - goto fail0; - } - mcfqspi->iobase = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(mcfqspi->iobase)) { status = PTR_ERR(mcfqspi->iobase); From 0c64bc1b5eace5f48dec7305b83ee4d613d58c94 Mon Sep 17 00:00:00 2001 From: John Whitmore Date: Fri, 6 Dec 2013 13:33:50 +0000 Subject: [PATCH 024/112] spi: Correction to typos in Documentation/spi/spi-summary Just a few simple typo corrections. Signed-off-by: John Whitmore Signed-off-by: Mark Brown --- Documentation/spi/spi-summary | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/Documentation/spi/spi-summary b/Documentation/spi/spi-summary index f21edb983413..f72e0d1e0da8 100644 --- a/Documentation/spi/spi-summary +++ b/Documentation/spi/spi-summary @@ -34,7 +34,7 @@ SPI slave functions are usually not interoperable between vendors - It may also be used to stream data in either direction (half duplex), or both of them at the same time (full duplex). - - Some devices may use eight bit words. Others may different word + - Some devices may use eight bit words. Others may use different word lengths, such as streams of 12-bit or 20-bit digital samples. - Words are usually sent with their most significant bit (MSB) first, @@ -121,7 +121,7 @@ active. So the master must set the clock to inactive before selecting a slave, and the slave can tell the chosen polarity by sampling the clock level when its select line goes active. That's why many devices support for example both modes 0 and 3: they don't care about polarity, -and alway clock data in/out on rising clock edges. +and always clock data in/out on rising clock edges. How do these driver programming interfaces work? @@ -139,7 +139,7 @@ a command and then reading its response. There are two types of SPI driver, here called: - Controller drivers ... controllers may be built in to System-On-Chip + Controller drivers ... controllers may be built into System-On-Chip processors, and often support both Master and Slave roles. These drivers touch hardware registers and may use DMA. Or they can be PIO bitbangers, needing just GPIO pins. @@ -548,7 +548,7 @@ SPI MASTER METHODS DEPRECATED METHODS master->transfer(struct spi_device *spi, struct spi_message *message) - This must not sleep. Its responsibility is arrange that the + This must not sleep. Its responsibility is to arrange that the transfer happens and its complete() callback is issued. The two will normally happen later, after other transfers complete, and if the controller is idle it will need to be kickstarted. This From 87917528cc922d0b91643dabacec01415c792086 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 6 Dec 2013 17:12:13 +0300 Subject: [PATCH 025/112] spi: bcm63xx-hsspi: checking for ERR_PTR instead of NULL devm_request_and_ioremap() returns NULL on error, it doesn't return an ERR_PTR(). This patch fixes it by switching to devm_ioremap_resource() which is the prefered function anyway. Fixes: 142168eba9dc ('spi: bcm63xx-hsspi: add bcm63xx HSSPI driver') Signed-off-by: Dan Carpenter Acked-by: Jonas Gorski Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx-hsspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c index bc8d848d33b7..2cfe8eb619fd 100644 --- a/drivers/spi/spi-bcm63xx-hsspi.c +++ b/drivers/spi/spi-bcm63xx-hsspi.c @@ -338,7 +338,7 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev) } res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - regs = devm_request_and_ioremap(dev, res_mem); + regs = devm_ioremap_resource(dev, res_mem); if (IS_ERR(regs)) return PTR_ERR(regs); From bb489841b1312f60b2450b01b1c5fa019872f0d3 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Mon, 9 Dec 2013 19:21:22 +0900 Subject: [PATCH 026/112] spi: orion: Use devm_clk_get() Use devm_clk_get() to make cleanup paths simpler. Signed-off-by: Jingoo Han Acked-by: Jason Cooper Signed-off-by: Mark Brown --- drivers/spi/spi-orion.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c index 744841e095e4..7f2121fe2622 100644 --- a/drivers/spi/spi-orion.c +++ b/drivers/spi/spi-orion.c @@ -434,7 +434,7 @@ static int orion_spi_probe(struct platform_device *pdev) spi = spi_master_get_devdata(master); spi->master = master; - spi->clk = clk_get(&pdev->dev, NULL); + spi->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(spi->clk)) { status = PTR_ERR(spi->clk); goto out; @@ -465,7 +465,6 @@ static int orion_spi_probe(struct platform_device *pdev) out_rel_clk: clk_disable_unprepare(spi->clk); - clk_put(spi->clk); out: spi_master_put(master); return status; @@ -481,7 +480,6 @@ static int orion_spi_remove(struct platform_device *pdev) spi = spi_master_get_devdata(master); clk_disable_unprepare(spi->clk); - clk_put(spi->clk); return 0; } From 9e03d05eee4ca45ed12749ef6c26bf616262cdd2 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Wed, 4 Dec 2013 14:13:50 +0900 Subject: [PATCH 027/112] spi: rcar: Use devm_spi_register_master() Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 19c65c43cbc5..cfdbb422a40a 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -887,7 +887,6 @@ static int rspi_remove(struct platform_device *pdev) { struct rspi_data *rspi = platform_get_drvdata(pdev); - spi_unregister_master(rspi->master); rspi_release_dma(rspi); return 0; @@ -972,7 +971,7 @@ static int rspi_probe(struct platform_device *pdev) goto error2; } - ret = spi_register_master(master); + ret = devm_spi_register_master(&pdev->dev, master); if (ret < 0) { dev_err(&pdev->dev, "spi_register_master error.\n"); goto error2; From ba1271bb05f81a1f4b26ab7a87771147d6f3185e Mon Sep 17 00:00:00 2001 From: Baruch Siach Date: Thu, 5 Dec 2013 13:39:05 +0200 Subject: [PATCH 028/112] spi: gpio: clarify gpio chipselect language Commit 743179849015 (of_spi: add generic binding support to specify cs gpio) introduced generic binding for gpio chip-select. The cs_gpio struct field, however, is an internal implementation detail of the Linux SPI subsystem, and should not be mentioned in the device tree binding documentation. Mention the previously defined cs-gpios master node property instead. Signed-off-by: Baruch Siach Signed-off-by: Mark Brown --- Documentation/devicetree/bindings/spi/spi-bus.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/spi/spi-bus.txt b/Documentation/devicetree/bindings/spi/spi-bus.txt index 800dafe5b01b..e5a4d1b4acfe 100644 --- a/Documentation/devicetree/bindings/spi/spi-bus.txt +++ b/Documentation/devicetree/bindings/spi/spi-bus.txt @@ -67,7 +67,7 @@ only 1(SINGLE), 2(DUAL) and 4(QUAD). Dual/Quad mode is not allowed when 3-wire mode is used. If a gpio chipselect is used for the SPI slave the gpio number will be passed -via the cs_gpio +via the SPI master node cs-gpios property. SPI example for an MPC5200 SPI bus: spi@f00 { From 48c3fc93803a27bb9d2c79d718cf142974f080c8 Mon Sep 17 00:00:00 2001 From: Michal Nazarewicz Date: Sun, 8 Dec 2013 16:35:09 +0100 Subject: [PATCH 029/112] spi: tegra114: use u32 for 32-bit register values MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Previously used “unsigned long” may lead to confusion should the code be compiled for 64-bit machine. This commit also removes some unused fields of the tegra_spi_data structure as well as removes duplicated #defines. Signed-off-by: Michal Nazarewicz Tested-by: Stephen Warren Acked-by: Stephen Warren Signed-off-by: Mark Brown --- drivers/spi/spi-tegra114.c | 98 +++++++++++++------------------------- 1 file changed, 34 insertions(+), 64 deletions(-) diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c index aaecfb3ebf58..47b93cc4bd19 100644 --- a/drivers/spi/spi-tegra114.c +++ b/drivers/spi/spi-tegra114.c @@ -54,11 +54,8 @@ #define SPI_CS_SS_VAL (1 << 20) #define SPI_CS_SW_HW (1 << 21) /* SPI_CS_POL_INACTIVE bits are default high */ -#define SPI_CS_POL_INACTIVE 22 -#define SPI_CS_POL_INACTIVE_0 (1 << 22) -#define SPI_CS_POL_INACTIVE_1 (1 << 23) -#define SPI_CS_POL_INACTIVE_2 (1 << 24) -#define SPI_CS_POL_INACTIVE_3 (1 << 25) + /* n from 0 to 3 */ +#define SPI_CS_POL_INACTIVE(n) (1 << (22 + (n))) #define SPI_CS_POL_INACTIVE_MASK (0xF << 22) #define SPI_CS_SEL_0 (0 << 26) @@ -165,9 +162,6 @@ #define MAX_HOLD_CYCLES 16 #define SPI_DEFAULT_SPEED 25000000 -#define MAX_CHIP_SELECT 4 -#define SPI_FIFO_DEPTH 64 - struct tegra_spi_data { struct device *dev; struct spi_master *master; @@ -184,7 +178,6 @@ struct tegra_spi_data { struct spi_device *cur_spi; struct spi_device *cs_control; unsigned cur_pos; - unsigned cur_len; unsigned words_per_32bit; unsigned bytes_per_word; unsigned curr_dma_words; @@ -204,12 +197,10 @@ struct tegra_spi_data { u32 rx_status; u32 status_reg; bool is_packed; - unsigned long packed_size; u32 command1_reg; u32 dma_control_reg; u32 def_command1_reg; - u32 spi_cs_timing; struct completion xfer_completion; struct spi_transfer *curr_xfer; @@ -227,14 +218,14 @@ struct tegra_spi_data { static int tegra_spi_runtime_suspend(struct device *dev); static int tegra_spi_runtime_resume(struct device *dev); -static inline unsigned long tegra_spi_readl(struct tegra_spi_data *tspi, +static inline u32 tegra_spi_readl(struct tegra_spi_data *tspi, unsigned long reg) { return readl(tspi->base + reg); } static inline void tegra_spi_writel(struct tegra_spi_data *tspi, - unsigned long val, unsigned long reg) + u32 val, unsigned long reg) { writel(val, tspi->base + reg); @@ -245,7 +236,7 @@ static inline void tegra_spi_writel(struct tegra_spi_data *tspi, static void tegra_spi_clear_status(struct tegra_spi_data *tspi) { - unsigned long val; + u32 val; /* Write 1 to clear status register */ val = tegra_spi_readl(tspi, SPI_TRANS_STATUS); @@ -296,10 +287,9 @@ static unsigned tegra_spi_fill_tx_fifo_from_client_txbuf( { unsigned nbytes; unsigned tx_empty_count; - unsigned long fifo_status; + u32 fifo_status; unsigned max_n_32bit; unsigned i, count; - unsigned long x; unsigned int written_words; unsigned fifo_words_left; u8 *tx_buf = (u8 *)t->tx_buf + tspi->cur_tx_pos; @@ -313,9 +303,9 @@ static unsigned tegra_spi_fill_tx_fifo_from_client_txbuf( nbytes = written_words * tspi->bytes_per_word; max_n_32bit = DIV_ROUND_UP(nbytes, 4); for (count = 0; count < max_n_32bit; count++) { - x = 0; + u32 x = 0; for (i = 0; (i < 4) && nbytes; i++, nbytes--) - x |= (*tx_buf++) << (i*8); + x |= (u32)(*tx_buf++) << (i * 8); tegra_spi_writel(tspi, x, SPI_TX_FIFO); } } else { @@ -323,10 +313,10 @@ static unsigned tegra_spi_fill_tx_fifo_from_client_txbuf( written_words = max_n_32bit; nbytes = written_words * tspi->bytes_per_word; for (count = 0; count < max_n_32bit; count++) { - x = 0; + u32 x = 0; for (i = 0; nbytes && (i < tspi->bytes_per_word); i++, nbytes--) - x |= ((*tx_buf++) << i*8); + x |= (u32)(*tx_buf++) << (i * 8); tegra_spi_writel(tspi, x, SPI_TX_FIFO); } } @@ -338,9 +328,8 @@ static unsigned int tegra_spi_read_rx_fifo_to_client_rxbuf( struct tegra_spi_data *tspi, struct spi_transfer *t) { unsigned rx_full_count; - unsigned long fifo_status; + u32 fifo_status; unsigned i, count; - unsigned long x; unsigned int read_words = 0; unsigned len; u8 *rx_buf = (u8 *)t->rx_buf + tspi->cur_rx_pos; @@ -350,20 +339,16 @@ static unsigned int tegra_spi_read_rx_fifo_to_client_rxbuf( if (tspi->is_packed) { len = tspi->curr_dma_words * tspi->bytes_per_word; for (count = 0; count < rx_full_count; count++) { - x = tegra_spi_readl(tspi, SPI_RX_FIFO); + u32 x = tegra_spi_readl(tspi, SPI_RX_FIFO); for (i = 0; len && (i < 4); i++, len--) *rx_buf++ = (x >> i*8) & 0xFF; } tspi->cur_rx_pos += tspi->curr_dma_words * tspi->bytes_per_word; read_words += tspi->curr_dma_words; } else { - unsigned int rx_mask; - unsigned int bits_per_word = t->bits_per_word; - - rx_mask = (1 << bits_per_word) - 1; + u32 rx_mask = ((u32)1 << t->bits_per_word) - 1; for (count = 0; count < rx_full_count; count++) { - x = tegra_spi_readl(tspi, SPI_RX_FIFO); - x &= rx_mask; + u32 x = tegra_spi_readl(tspi, SPI_RX_FIFO) & rx_mask; for (i = 0; (i < tspi->bytes_per_word); i++) *rx_buf++ = (x >> (i*8)) & 0xFF; } @@ -376,27 +361,24 @@ static unsigned int tegra_spi_read_rx_fifo_to_client_rxbuf( static void tegra_spi_copy_client_txbuf_to_spi_txbuf( struct tegra_spi_data *tspi, struct spi_transfer *t) { - unsigned len; - /* Make the dma buffer to read by cpu */ dma_sync_single_for_cpu(tspi->dev, tspi->tx_dma_phys, tspi->dma_buf_size, DMA_TO_DEVICE); if (tspi->is_packed) { - len = tspi->curr_dma_words * tspi->bytes_per_word; + unsigned len = tspi->curr_dma_words * tspi->bytes_per_word; memcpy(tspi->tx_dma_buf, t->tx_buf + tspi->cur_pos, len); } else { unsigned int i; unsigned int count; u8 *tx_buf = (u8 *)t->tx_buf + tspi->cur_tx_pos; unsigned consume = tspi->curr_dma_words * tspi->bytes_per_word; - unsigned int x; for (count = 0; count < tspi->curr_dma_words; count++) { - x = 0; + u32 x = 0; for (i = 0; consume && (i < tspi->bytes_per_word); i++, consume--) - x |= ((*tx_buf++) << i * 8); + x |= (u32)(*tx_buf++) << (i * 8); tspi->tx_dma_buf[count] = x; } } @@ -410,27 +392,21 @@ static void tegra_spi_copy_client_txbuf_to_spi_txbuf( static void tegra_spi_copy_spi_rxbuf_to_client_rxbuf( struct tegra_spi_data *tspi, struct spi_transfer *t) { - unsigned len; - /* Make the dma buffer to read by cpu */ dma_sync_single_for_cpu(tspi->dev, tspi->rx_dma_phys, tspi->dma_buf_size, DMA_FROM_DEVICE); if (tspi->is_packed) { - len = tspi->curr_dma_words * tspi->bytes_per_word; + unsigned len = tspi->curr_dma_words * tspi->bytes_per_word; memcpy(t->rx_buf + tspi->cur_rx_pos, tspi->rx_dma_buf, len); } else { unsigned int i; unsigned int count; unsigned char *rx_buf = t->rx_buf + tspi->cur_rx_pos; - unsigned int x; - unsigned int rx_mask; - unsigned int bits_per_word = t->bits_per_word; + u32 rx_mask = ((u32)1 << t->bits_per_word) - 1; - rx_mask = (1 << bits_per_word) - 1; for (count = 0; count < tspi->curr_dma_words; count++) { - x = tspi->rx_dma_buf[count]; - x &= rx_mask; + u32 x = tspi->rx_dma_buf[count] & rx_mask; for (i = 0; (i < tspi->bytes_per_word); i++) *rx_buf++ = (x >> (i*8)) & 0xFF; } @@ -490,16 +466,16 @@ static int tegra_spi_start_rx_dma(struct tegra_spi_data *tspi, int len) static int tegra_spi_start_dma_based_transfer( struct tegra_spi_data *tspi, struct spi_transfer *t) { - unsigned long val; + u32 val; unsigned int len; int ret = 0; - unsigned long status; + u32 status; /* Make sure that Rx and Tx fifo are empty */ status = tegra_spi_readl(tspi, SPI_FIFO_STATUS); if ((status & SPI_FIFO_EMPTY) != SPI_FIFO_EMPTY) { - dev_err(tspi->dev, - "Rx/Tx fifo are not empty status 0x%08lx\n", status); + dev_err(tspi->dev, "Rx/Tx fifo are not empty status 0x%08x\n", + (unsigned)status); return -EIO; } @@ -564,7 +540,7 @@ static int tegra_spi_start_dma_based_transfer( static int tegra_spi_start_cpu_based_transfer( struct tegra_spi_data *tspi, struct spi_transfer *t) { - unsigned long val; + u32 val; unsigned cur_words; if (tspi->cur_direction & DATA_DIR_TX) @@ -677,13 +653,13 @@ static void tegra_spi_deinit_dma_param(struct tegra_spi_data *tspi, dma_release_channel(dma_chan); } -static unsigned long tegra_spi_setup_transfer_one(struct spi_device *spi, +static u32 tegra_spi_setup_transfer_one(struct spi_device *spi, struct spi_transfer *t, bool is_first_of_msg) { struct tegra_spi_data *tspi = spi_master_get_devdata(spi->master); u32 speed = t->speed_hz; u8 bits_per_word = t->bits_per_word; - unsigned long command1; + u32 command1; int req_mode; if (speed != tspi->cur_speed) { @@ -738,7 +714,7 @@ static unsigned long tegra_spi_setup_transfer_one(struct spi_device *spi, } static int tegra_spi_start_transfer_one(struct spi_device *spi, - struct spi_transfer *t, unsigned long command1) + struct spi_transfer *t, u32 command1) { struct tegra_spi_data *tspi = spi_master_get_devdata(spi->master); unsigned total_fifo_words; @@ -763,8 +739,8 @@ static int tegra_spi_start_transfer_one(struct spi_device *spi, tegra_spi_writel(tspi, command1, SPI_COMMAND1); tspi->command1_reg = command1; - dev_dbg(tspi->dev, "The def 0x%x and written 0x%lx\n", - tspi->def_command1_reg, command1); + dev_dbg(tspi->dev, "The def 0x%x and written 0x%x\n", + tspi->def_command1_reg, (unsigned)command1); if (total_fifo_words > SPI_FIFO_DEPTH) ret = tegra_spi_start_dma_based_transfer(tspi, t); @@ -776,15 +752,9 @@ static int tegra_spi_start_transfer_one(struct spi_device *spi, static int tegra_spi_setup(struct spi_device *spi) { struct tegra_spi_data *tspi = spi_master_get_devdata(spi->master); - unsigned long val; + u32 val; unsigned long flags; int ret; - unsigned int cs_pol_bit[MAX_CHIP_SELECT] = { - SPI_CS_POL_INACTIVE_0, - SPI_CS_POL_INACTIVE_1, - SPI_CS_POL_INACTIVE_2, - SPI_CS_POL_INACTIVE_3, - }; dev_dbg(&spi->dev, "setup %d bpw, %scpol, %scpha, %dHz\n", spi->bits_per_word, @@ -806,9 +776,9 @@ static int tegra_spi_setup(struct spi_device *spi) spin_lock_irqsave(&tspi->lock, flags); val = tspi->def_command1_reg; if (spi->mode & SPI_CS_HIGH) - val &= ~cs_pol_bit[spi->chip_select]; + val &= ~SPI_CS_POL_INACTIVE(spi->chip_select); else - val |= cs_pol_bit[spi->chip_select]; + val |= SPI_CS_POL_INACTIVE(spi->chip_select); tspi->def_command1_reg = val; tegra_spi_writel(tspi, tspi->def_command1_reg, SPI_COMMAND1); spin_unlock_irqrestore(&tspi->lock, flags); @@ -842,7 +812,7 @@ static int tegra_spi_transfer_one_message(struct spi_master *master, msg->actual_length = 0; list_for_each_entry(xfer, &msg->transfers, transfer_list) { - unsigned long cmd1; + u32 cmd1; reinit_completion(&tspi->xfer_completion); From 5fd38677a48deab4ea480f078a838758a030d3a2 Mon Sep 17 00:00:00 2001 From: Michal Nazarewicz Date: Sun, 8 Dec 2013 16:35:10 +0100 Subject: [PATCH 030/112] spi: tegra20-slink: use u32 for 32-bit register values MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Previously used “unsigned long” may lead to confusion should the code be compiled for 64-bit machine. Signed-off-by: Michal Nazarewicz Signed-off-by: Mark Brown --- drivers/spi/spi-tegra20-slink.c | 97 ++++++++++++++------------------- 1 file changed, 40 insertions(+), 57 deletions(-) diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c index e66715ba37ed..3ce1de8872f0 100644 --- a/drivers/spi/spi-tegra20-slink.c +++ b/drivers/spi/spi-tegra20-slink.c @@ -196,7 +196,7 @@ struct tegra_slink_data { u32 rx_status; u32 status_reg; bool is_packed; - unsigned long packed_size; + u32 packed_size; u32 command_reg; u32 command2_reg; @@ -220,14 +220,14 @@ struct tegra_slink_data { static int tegra_slink_runtime_suspend(struct device *dev); static int tegra_slink_runtime_resume(struct device *dev); -static inline unsigned long tegra_slink_readl(struct tegra_slink_data *tspi, +static inline u32 tegra_slink_readl(struct tegra_slink_data *tspi, unsigned long reg) { return readl(tspi->base + reg); } static inline void tegra_slink_writel(struct tegra_slink_data *tspi, - unsigned long val, unsigned long reg) + u32 val, unsigned long reg) { writel(val, tspi->base + reg); @@ -238,38 +238,30 @@ static inline void tegra_slink_writel(struct tegra_slink_data *tspi, static void tegra_slink_clear_status(struct tegra_slink_data *tspi) { - unsigned long val; - unsigned long val_write = 0; + u32 val_write; - val = tegra_slink_readl(tspi, SLINK_STATUS); + tegra_slink_readl(tspi, SLINK_STATUS); /* Write 1 to clear status register */ val_write = SLINK_RDY | SLINK_FIFO_ERROR; tegra_slink_writel(tspi, val_write, SLINK_STATUS); } -static unsigned long tegra_slink_get_packed_size(struct tegra_slink_data *tspi, +static u32 tegra_slink_get_packed_size(struct tegra_slink_data *tspi, struct spi_transfer *t) { - unsigned long val; - switch (tspi->bytes_per_word) { case 0: - val = SLINK_PACK_SIZE_4; - break; + return SLINK_PACK_SIZE_4; case 1: - val = SLINK_PACK_SIZE_8; - break; + return SLINK_PACK_SIZE_8; case 2: - val = SLINK_PACK_SIZE_16; - break; + return SLINK_PACK_SIZE_16; case 4: - val = SLINK_PACK_SIZE_32; - break; + return SLINK_PACK_SIZE_32; default: - val = 0; + return 0; } - return val; } static unsigned tegra_slink_calculate_curr_xfer_param( @@ -312,10 +304,9 @@ static unsigned tegra_slink_fill_tx_fifo_from_client_txbuf( { unsigned nbytes; unsigned tx_empty_count; - unsigned long fifo_status; + u32 fifo_status; unsigned max_n_32bit; unsigned i, count; - unsigned long x; unsigned int written_words; unsigned fifo_words_left; u8 *tx_buf = (u8 *)t->tx_buf + tspi->cur_tx_pos; @@ -329,9 +320,9 @@ static unsigned tegra_slink_fill_tx_fifo_from_client_txbuf( nbytes = written_words * tspi->bytes_per_word; max_n_32bit = DIV_ROUND_UP(nbytes, 4); for (count = 0; count < max_n_32bit; count++) { - x = 0; + u32 x = 0; for (i = 0; (i < 4) && nbytes; i++, nbytes--) - x |= (*tx_buf++) << (i*8); + x |= (u32)(*tx_buf++) << (i * 8); tegra_slink_writel(tspi, x, SLINK_TX_FIFO); } } else { @@ -339,10 +330,10 @@ static unsigned tegra_slink_fill_tx_fifo_from_client_txbuf( written_words = max_n_32bit; nbytes = written_words * tspi->bytes_per_word; for (count = 0; count < max_n_32bit; count++) { - x = 0; + u32 x = 0; for (i = 0; nbytes && (i < tspi->bytes_per_word); i++, nbytes--) - x |= ((*tx_buf++) << i*8); + x |= (u32)(*tx_buf++) << (i * 8); tegra_slink_writel(tspi, x, SLINK_TX_FIFO); } } @@ -354,9 +345,8 @@ static unsigned int tegra_slink_read_rx_fifo_to_client_rxbuf( struct tegra_slink_data *tspi, struct spi_transfer *t) { unsigned rx_full_count; - unsigned long fifo_status; + u32 fifo_status; unsigned i, count; - unsigned long x; unsigned int read_words = 0; unsigned len; u8 *rx_buf = (u8 *)t->rx_buf + tspi->cur_rx_pos; @@ -366,7 +356,7 @@ static unsigned int tegra_slink_read_rx_fifo_to_client_rxbuf( if (tspi->is_packed) { len = tspi->curr_dma_words * tspi->bytes_per_word; for (count = 0; count < rx_full_count; count++) { - x = tegra_slink_readl(tspi, SLINK_RX_FIFO); + u32 x = tegra_slink_readl(tspi, SLINK_RX_FIFO); for (i = 0; len && (i < 4); i++, len--) *rx_buf++ = (x >> i*8) & 0xFF; } @@ -374,7 +364,7 @@ static unsigned int tegra_slink_read_rx_fifo_to_client_rxbuf( read_words += tspi->curr_dma_words; } else { for (count = 0; count < rx_full_count; count++) { - x = tegra_slink_readl(tspi, SLINK_RX_FIFO); + u32 x = tegra_slink_readl(tspi, SLINK_RX_FIFO); for (i = 0; (i < tspi->bytes_per_word); i++) *rx_buf++ = (x >> (i*8)) & 0xFF; } @@ -387,27 +377,24 @@ static unsigned int tegra_slink_read_rx_fifo_to_client_rxbuf( static void tegra_slink_copy_client_txbuf_to_spi_txbuf( struct tegra_slink_data *tspi, struct spi_transfer *t) { - unsigned len; - /* Make the dma buffer to read by cpu */ dma_sync_single_for_cpu(tspi->dev, tspi->tx_dma_phys, tspi->dma_buf_size, DMA_TO_DEVICE); if (tspi->is_packed) { - len = tspi->curr_dma_words * tspi->bytes_per_word; + unsigned len = tspi->curr_dma_words * tspi->bytes_per_word; memcpy(tspi->tx_dma_buf, t->tx_buf + tspi->cur_pos, len); } else { unsigned int i; unsigned int count; u8 *tx_buf = (u8 *)t->tx_buf + tspi->cur_tx_pos; unsigned consume = tspi->curr_dma_words * tspi->bytes_per_word; - unsigned int x; for (count = 0; count < tspi->curr_dma_words; count++) { - x = 0; + u32 x = 0; for (i = 0; consume && (i < tspi->bytes_per_word); i++, consume--) - x |= ((*tx_buf++) << i * 8); + x |= (u32)(*tx_buf++) << (i * 8); tspi->tx_dma_buf[count] = x; } } @@ -434,14 +421,10 @@ static void tegra_slink_copy_spi_rxbuf_to_client_rxbuf( unsigned int i; unsigned int count; unsigned char *rx_buf = t->rx_buf + tspi->cur_rx_pos; - unsigned int x; - unsigned int rx_mask, bits_per_word; + u32 rx_mask = ((u32)1 << t->bits_per_word) - 1; - bits_per_word = t->bits_per_word; - rx_mask = (1 << bits_per_word) - 1; for (count = 0; count < tspi->curr_dma_words; count++) { - x = tspi->rx_dma_buf[count]; - x &= rx_mask; + u32 x = tspi->rx_dma_buf[count] & rx_mask; for (i = 0; (i < tspi->bytes_per_word); i++) *rx_buf++ = (x >> (i*8)) & 0xFF; } @@ -501,17 +484,16 @@ static int tegra_slink_start_rx_dma(struct tegra_slink_data *tspi, int len) static int tegra_slink_start_dma_based_transfer( struct tegra_slink_data *tspi, struct spi_transfer *t) { - unsigned long val; - unsigned long test_val; + u32 val; unsigned int len; int ret = 0; - unsigned long status; + u32 status; /* Make sure that Rx and Tx fifo are empty */ status = tegra_slink_readl(tspi, SLINK_STATUS); if ((status & SLINK_FIFO_EMPTY) != SLINK_FIFO_EMPTY) { - dev_err(tspi->dev, - "Rx/Tx fifo are not empty status 0x%08lx\n", status); + dev_err(tspi->dev, "Rx/Tx fifo are not empty status 0x%08x\n", + (unsigned)status); return -EIO; } @@ -551,9 +533,9 @@ static int tegra_slink_start_dma_based_transfer( } /* Wait for tx fifo to be fill before starting slink */ - test_val = tegra_slink_readl(tspi, SLINK_STATUS); - while (!(test_val & SLINK_TX_FULL)) - test_val = tegra_slink_readl(tspi, SLINK_STATUS); + status = tegra_slink_readl(tspi, SLINK_STATUS); + while (!(status & SLINK_TX_FULL)) + status = tegra_slink_readl(tspi, SLINK_STATUS); } if (tspi->cur_direction & DATA_DIR_RX) { @@ -587,7 +569,7 @@ static int tegra_slink_start_dma_based_transfer( static int tegra_slink_start_cpu_based_transfer( struct tegra_slink_data *tspi, struct spi_transfer *t) { - unsigned long val; + u32 val; unsigned cur_words; val = tspi->packed_size; @@ -714,8 +696,8 @@ static int tegra_slink_start_transfer_one(struct spi_device *spi, u8 bits_per_word; unsigned total_fifo_words; int ret; - unsigned long command; - unsigned long command2; + u32 command; + u32 command2; bits_per_word = t->bits_per_word; speed = t->speed_hz; @@ -762,17 +744,18 @@ static int tegra_slink_start_transfer_one(struct spi_device *spi, static int tegra_slink_setup(struct spi_device *spi) { - struct tegra_slink_data *tspi = spi_master_get_devdata(spi->master); - unsigned long val; - unsigned long flags; - int ret; - unsigned int cs_pol_bit[MAX_CHIP_SELECT] = { + static const u32 cs_pol_bit[MAX_CHIP_SELECT] = { SLINK_CS_POLARITY, SLINK_CS_POLARITY1, SLINK_CS_POLARITY2, SLINK_CS_POLARITY3, }; + struct tegra_slink_data *tspi = spi_master_get_devdata(spi->master); + u32 val; + unsigned long flags; + int ret; + dev_dbg(&spi->dev, "setup %d bpw, %scpol, %scpha, %dHz\n", spi->bits_per_word, spi->mode & SPI_CPOL ? "" : "~", From a553a31d9f32700ef0d3a1490e222ec15e600140 Mon Sep 17 00:00:00 2001 From: Michal Nazarewicz Date: Sun, 8 Dec 2013 16:35:11 +0100 Subject: [PATCH 031/112] spi: tegra20-sflash: use u32 for 32-bit register values MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Previously used “unsigned long” may lead to confusion should the code be compiled for 64-bit machine. Signed-off-by: Michal Nazarewicz Signed-off-by: Mark Brown --- drivers/spi/spi-tegra20-sflash.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c index 4dc8e8129459..af78c17388d2 100644 --- a/drivers/spi/spi-tegra20-sflash.c +++ b/drivers/spi/spi-tegra20-sflash.c @@ -148,14 +148,14 @@ struct tegra_sflash_data { static int tegra_sflash_runtime_suspend(struct device *dev); static int tegra_sflash_runtime_resume(struct device *dev); -static inline unsigned long tegra_sflash_readl(struct tegra_sflash_data *tsd, +static inline u32 tegra_sflash_readl(struct tegra_sflash_data *tsd, unsigned long reg) { return readl(tsd->base + reg); } static inline void tegra_sflash_writel(struct tegra_sflash_data *tsd, - unsigned long val, unsigned long reg) + u32 val, unsigned long reg) { writel(val, tsd->base + reg); } @@ -185,7 +185,7 @@ static unsigned tegra_sflash_fill_tx_fifo_from_client_txbuf( struct tegra_sflash_data *tsd, struct spi_transfer *t) { unsigned nbytes; - unsigned long status; + u32 status; unsigned max_n_32bit = tsd->curr_xfer_words; u8 *tx_buf = (u8 *)t->tx_buf + tsd->cur_tx_pos; @@ -196,11 +196,11 @@ static unsigned tegra_sflash_fill_tx_fifo_from_client_txbuf( status = tegra_sflash_readl(tsd, SPI_STATUS); while (!(status & SPI_TXF_FULL)) { int i; - unsigned int x = 0; + u32 x = 0; for (i = 0; nbytes && (i < tsd->bytes_per_word); i++, nbytes--) - x |= ((*tx_buf++) << i*8); + x |= (u32)(*tx_buf++) << (i * 8); tegra_sflash_writel(tsd, x, SPI_TX_FIFO); if (!nbytes) break; @@ -214,16 +214,14 @@ static unsigned tegra_sflash_fill_tx_fifo_from_client_txbuf( static int tegra_sflash_read_rx_fifo_to_client_rxbuf( struct tegra_sflash_data *tsd, struct spi_transfer *t) { - unsigned long status; + u32 status; unsigned int read_words = 0; u8 *rx_buf = (u8 *)t->rx_buf + tsd->cur_rx_pos; status = tegra_sflash_readl(tsd, SPI_STATUS); while (!(status & SPI_RXF_EMPTY)) { int i; - unsigned long x; - - x = tegra_sflash_readl(tsd, SPI_RX_FIFO); + u32 x = tegra_sflash_readl(tsd, SPI_RX_FIFO); for (i = 0; (i < tsd->bytes_per_word); i++) *rx_buf++ = (x >> (i*8)) & 0xFF; read_words++; @@ -236,7 +234,7 @@ static int tegra_sflash_read_rx_fifo_to_client_rxbuf( static int tegra_sflash_start_cpu_based_transfer( struct tegra_sflash_data *tsd, struct spi_transfer *t) { - unsigned long val = 0; + u32 val = 0; unsigned cur_words; if (tsd->cur_direction & DATA_DIR_TX) @@ -266,7 +264,7 @@ static int tegra_sflash_start_transfer_one(struct spi_device *spi, { struct tegra_sflash_data *tsd = spi_master_get_devdata(spi->master); u32 speed; - unsigned long command; + u32 command; speed = t->speed_hz; if (speed != tsd->cur_speed) { @@ -313,7 +311,7 @@ static int tegra_sflash_start_transfer_one(struct spi_device *spi, tegra_sflash_writel(tsd, command, SPI_COMMAND); tsd->command_reg = command; - return tegra_sflash_start_cpu_based_transfer(tsd, t); + return tegra_sflash_start_cpu_based_transfer(tsd, t); } static int tegra_sflash_setup(struct spi_device *spi) From 7227cd18934276eb6d7cf758f79f8c6feacdc421 Mon Sep 17 00:00:00 2001 From: Hou Zhiqiang Date: Wed, 11 Dec 2013 13:09:40 +0800 Subject: [PATCH 032/112] spi/fsl-espi: fix the return value judgment of irq_of_parse_and_map. Signed-off-by: Hou Zhiqiang Acked-by: Grant Likely Signed-off-by: Mark Brown --- drivers/spi/spi-fsl-espi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c index 80d8f40f7e05..8106006cdc39 100644 --- a/drivers/spi/spi-fsl-espi.c +++ b/drivers/spi/spi-fsl-espi.c @@ -705,7 +705,7 @@ static int of_fsl_espi_probe(struct platform_device *ofdev) goto err; irq = irq_of_parse_and_map(np, 0); - if (!ret) { + if (!irq) { ret = -EINVAL; goto err; } From 714bb654e97535c4bed4a8da0628cbc842dc8e31 Mon Sep 17 00:00:00 2001 From: Hou Zhiqiang Date: Thu, 12 Dec 2013 12:53:52 +0800 Subject: [PATCH 033/112] spi/fsl-espi: Add Power Management support for eSPI controller Add PM support for eSPI controller using callback function suspend and resume in .driver.pm of platform_driver. Signed-off-by: Hou Zhiqiang Signed-off-by: Mark Brown --- drivers/spi/spi-fsl-espi.c | 61 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c index 8106006cdc39..428dc7a6b62e 100644 --- a/drivers/spi/spi-fsl-espi.c +++ b/drivers/spi/spi-fsl-espi.c @@ -727,6 +727,66 @@ static int of_fsl_espi_remove(struct platform_device *dev) return mpc8xxx_spi_remove(&dev->dev); } +#ifdef CONFIG_PM_SLEEP +static int of_fsl_espi_suspend(struct device *dev) +{ + struct spi_master *master = dev_get_drvdata(dev); + struct mpc8xxx_spi *mpc8xxx_spi; + struct fsl_espi_reg *reg_base; + u32 regval; + int ret; + + mpc8xxx_spi = spi_master_get_devdata(master); + reg_base = mpc8xxx_spi->reg_base; + + ret = spi_master_suspend(master); + if (ret) { + dev_warn(dev, "cannot suspend master\n"); + return ret; + } + + regval = mpc8xxx_spi_read_reg(®_base->mode); + regval &= ~SPMODE_ENABLE; + mpc8xxx_spi_write_reg(®_base->mode, regval); + + return 0; +} + +static int of_fsl_espi_resume(struct device *dev) +{ + struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); + struct spi_master *master = dev_get_drvdata(dev); + struct mpc8xxx_spi *mpc8xxx_spi; + struct fsl_espi_reg *reg_base; + u32 regval; + int i; + + mpc8xxx_spi = spi_master_get_devdata(master); + reg_base = mpc8xxx_spi->reg_base; + + /* SPI controller initializations */ + mpc8xxx_spi_write_reg(®_base->mode, 0); + mpc8xxx_spi_write_reg(®_base->mask, 0); + mpc8xxx_spi_write_reg(®_base->command, 0); + mpc8xxx_spi_write_reg(®_base->event, 0xffffffff); + + /* Init eSPI CS mode register */ + for (i = 0; i < pdata->max_chipselect; i++) + mpc8xxx_spi_write_reg(®_base->csmode[i], CSMODE_INIT_VAL); + + /* Enable SPI interface */ + regval = pdata->initial_spmode | SPMODE_INIT_VAL | SPMODE_ENABLE; + + mpc8xxx_spi_write_reg(®_base->mode, regval); + + return spi_master_resume(master); +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops espi_pm = { + SET_SYSTEM_SLEEP_PM_OPS(of_fsl_espi_suspend, of_fsl_espi_resume) +}; + static const struct of_device_id of_fsl_espi_match[] = { { .compatible = "fsl,mpc8536-espi" }, {} @@ -738,6 +798,7 @@ static struct platform_driver fsl_espi_driver = { .name = "fsl_espi", .owner = THIS_MODULE, .of_match_table = of_fsl_espi_match, + .pm = &espi_pm, }, .probe = of_fsl_espi_probe, .remove = of_fsl_espi_remove, From 89c1f60746106755e29dcc3db9f22e37000891ef Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Fri, 13 Dec 2013 18:27:44 -0800 Subject: [PATCH 034/112] spi: Order fields in spi_device for better packing Now that spi_device->mode is a u16, the chip_select, bits_per_mode, and mode fields pack poorly, taking 8 bytes: four data and four padding. By moving (u8)bits_per_word up one position, to after (u8)chip_select, they pack better and only use 4 bytes. Signed-off-by: Trent Piepho Reviewed-by: Sourav Poddar Tested-by: Sourav Poddar g Signed-off-by: Mark Brown --- include/linux/spi/spi.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 8c62ba74dd91..27a882978c15 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -75,6 +75,7 @@ struct spi_device { struct spi_master *master; u32 max_speed_hz; u8 chip_select; + u8 bits_per_word; u16 mode; #define SPI_CPHA 0x01 /* clock phase */ #define SPI_CPOL 0x02 /* clock polarity */ @@ -92,7 +93,6 @@ struct spi_device { #define SPI_TX_QUAD 0x200 /* transmit with 4 wires */ #define SPI_RX_DUAL 0x400 /* receive with 2 wires */ #define SPI_RX_QUAD 0x800 /* receive with 4 wires */ - u8 bits_per_word; int irq; void *controller_state; void *controller_data; From b1bdd4f883e1938a1921f300d7f164ce583b1a64 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Mon, 9 Dec 2013 19:20:45 +0900 Subject: [PATCH 035/112] spi: bcm63xx-hsspi: Use devm_clk_get() Use devm_clk_get() to make cleanup paths simpler. Signed-off-by: Jingoo Han Acked-by: Jonas Gorski Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx-hsspi.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c index 2cfe8eb619fd..6a763a8a8a5e 100644 --- a/drivers/spi/spi-bcm63xx-hsspi.c +++ b/drivers/spi/spi-bcm63xx-hsspi.c @@ -342,16 +342,14 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev) if (IS_ERR(regs)) return PTR_ERR(regs); - clk = clk_get(dev, "hsspi"); + clk = devm_clk_get(dev, "hsspi"); if (IS_ERR(clk)) return PTR_ERR(clk); rate = clk_get_rate(clk); - if (!rate) { - ret = -EINVAL; - goto out_put_clk; - } + if (!rate) + return -EINVAL; clk_prepare_enable(clk); @@ -409,9 +407,6 @@ out_put_master: spi_master_put(master); out_disable_clk: clk_disable_unprepare(clk); -out_put_clk: - clk_put(clk); - return ret; } @@ -426,7 +421,6 @@ static int bcm63xx_hsspi_remove(struct platform_device *pdev) /* reset the hardware and block queue progress */ __raw_writel(0, bs->regs + HSSPI_INT_MASK_REG); clk_disable_unprepare(bs->clk); - clk_put(bs->clk); return 0; } From dea5de1b37c08bc8a028b6a53145b7594ba6eb31 Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Tue, 17 Dec 2013 21:44:46 +0100 Subject: [PATCH 036/112] spi/bcm63xx-hsspi: check result of clk_prepare_enable Ensure we notice if the clock cannot be enabled for any reason and pass the error down. Signed-off-by: Jonas Gorski Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx-hsspi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c index 6a763a8a8a5e..949dfb57fe89 100644 --- a/drivers/spi/spi-bcm63xx-hsspi.c +++ b/drivers/spi/spi-bcm63xx-hsspi.c @@ -351,7 +351,9 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev) if (!rate) return -EINVAL; - clk_prepare_enable(clk); + ret = clk_prepare_enable(clk); + if (ret) + return ret; master = spi_alloc_master(&pdev->dev, sizeof(*bs)); if (!master) { From 7d255695804fbe7b2c30bcd54c1faf1d0918443c Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Tue, 17 Dec 2013 21:44:47 +0100 Subject: [PATCH 037/112] spi/bcm63xx-hsspi: use devm_register_master() Simplifies the remove call. Signed-off-by: Jonas Gorski Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx-hsspi.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c index 949dfb57fe89..1721ea99d688 100644 --- a/drivers/spi/spi-bcm63xx-hsspi.c +++ b/drivers/spi/spi-bcm63xx-hsspi.c @@ -399,7 +399,7 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev) goto out_put_master; /* register and we are done */ - ret = spi_register_master(master); + ret = devm_spi_register_master(dev, master); if (ret) goto out_put_master; @@ -418,8 +418,6 @@ static int bcm63xx_hsspi_remove(struct platform_device *pdev) struct spi_master *master = platform_get_drvdata(pdev); struct bcm63xx_hsspi *bs = spi_master_get_devdata(master); - spi_unregister_master(master); - /* reset the hardware and block queue progress */ __raw_writel(0, bs->regs + HSSPI_INT_MASK_REG); clk_disable_unprepare(bs->clk); From 937ebf9cd34ab3bc4ca26a4adf9c759fc58cc5e2 Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Tue, 17 Dec 2013 21:44:48 +0100 Subject: [PATCH 038/112] spi/bcm63xx-hsspi: fix pm sleep support Use the right CONFIG symbol to guard, properly (un)preprare clocks on suspend/resume, and check the result of it. Signed-off-by: Jonas Gorski Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx-hsspi.c | 25 +++++++++++-------------- 1 file changed, 11 insertions(+), 14 deletions(-) diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c index 1721ea99d688..b528f9fc8bc0 100644 --- a/drivers/spi/spi-bcm63xx-hsspi.c +++ b/drivers/spi/spi-bcm63xx-hsspi.c @@ -425,14 +425,14 @@ static int bcm63xx_hsspi_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int bcm63xx_hsspi_suspend(struct device *dev) { struct spi_master *master = dev_get_drvdata(dev); struct bcm63xx_hsspi *bs = spi_master_get_devdata(master); spi_master_suspend(master); - clk_disable(bs->clk); + clk_disable_unprepare(bs->clk); return 0; } @@ -441,30 +441,27 @@ static int bcm63xx_hsspi_resume(struct device *dev) { struct spi_master *master = dev_get_drvdata(dev); struct bcm63xx_hsspi *bs = spi_master_get_devdata(master); + int ret; + + ret = clk_prepare_enable(bs->clk); + if (ret) + return ret; - clk_enable(bs->clk); spi_master_resume(master); return 0; } - -static const struct dev_pm_ops bcm63xx_hsspi_pm_ops = { - .suspend = bcm63xx_hsspi_suspend, - .resume = bcm63xx_hsspi_resume, -}; - -#define BCM63XX_HSSPI_PM_OPS (&bcm63xx_hsspi_pm_ops) -#else -#define BCM63XX_HSSPI_PM_OPS NULL #endif - +static const struct dev_pm_ops bcm63xx_hsspi_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(bcm63xx_hsspi_suspend, bcm63xx_hsspi_resume) +}; static struct platform_driver bcm63xx_hsspi_driver = { .driver = { .name = "bcm63xx-hsspi", .owner = THIS_MODULE, - .pm = BCM63XX_HSSPI_PM_OPS, + .pm = &bcm63xx_hsspi_pm_ops, }, .probe = bcm63xx_hsspi_probe, .remove = bcm63xx_hsspi_remove, From 86b3bde003e6bf60ccb9c09b4115b8a2f533974c Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Tue, 17 Dec 2013 21:42:07 +0100 Subject: [PATCH 039/112] spi/bcm63xx: don't substract prepend length from total length The spi command must include the full message length including any prepended writes, else transfers larger than 256 bytes will be incomplete. Signed-off-by: Jonas Gorski Acked-by: Florian Fainelli Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- drivers/spi/spi-bcm63xx.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c index 80d56b214eb5..89331cd0ddaa 100644 --- a/drivers/spi/spi-bcm63xx.c +++ b/drivers/spi/spi-bcm63xx.c @@ -169,8 +169,6 @@ static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first, transfer_list); } - len -= prepend_len; - init_completion(&bs->done); /* Fill in the Message control register */ From acf4fc6ffa84b59e83f34f587be623a05bc0c55c Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Mon, 9 Dec 2013 19:20:15 +0900 Subject: [PATCH 040/112] spi: bcm63xx: Use devm_clk_get() Use devm_clk_get() to make cleanup paths simpler. Signed-off-by: Jingoo Han Acked-by: Jonas Gorski Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c index 80d56b214eb5..7b4ead78782c 100644 --- a/drivers/spi/spi-bcm63xx.c +++ b/drivers/spi/spi-bcm63xx.c @@ -345,22 +345,19 @@ static int bcm63xx_spi_probe(struct platform_device *pdev) irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(dev, "no irq\n"); - ret = -ENXIO; - goto out; + return -ENXIO; } - clk = clk_get(dev, "spi"); + clk = devm_clk_get(dev, "spi"); if (IS_ERR(clk)) { dev_err(dev, "no clock for device\n"); - ret = PTR_ERR(clk); - goto out; + return PTR_ERR(clk); } master = spi_alloc_master(dev, sizeof(*bs)); if (!master) { dev_err(dev, "out of memory\n"); - ret = -ENOMEM; - goto out_clk; + return -ENOMEM; } bs = spi_master_get_devdata(master); @@ -427,9 +424,6 @@ out_clk_disable: clk_disable_unprepare(clk); out_err: spi_master_put(master); -out_clk: - clk_put(clk); -out: return ret; } @@ -443,7 +437,6 @@ static int bcm63xx_spi_remove(struct platform_device *pdev) /* HW shutdown */ clk_disable_unprepare(bs->clk); - clk_put(bs->clk); return 0; } From 20e9e78f8b0f1ed02a3a095240853b1767482757 Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Tue, 17 Dec 2013 21:42:08 +0100 Subject: [PATCH 041/112] spi/bcm63xx: don't reject reads >= 256 bytes The rx_tail register is only 8 bit wide, so it will wrap around after 256 read bytes. This makes it rather meaningless, so drop any usage of it to not treat reads over 256 as failed. Signed-off-by: Jonas Gorski Acked-by: Florian Fainelli Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c index 7b4ead78782c..e20a669c190c 100644 --- a/drivers/spi/spi-bcm63xx.c +++ b/drivers/spi/spi-bcm63xx.c @@ -205,13 +205,7 @@ static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first, if (!timeout) return -ETIMEDOUT; - /* read out all data */ - rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL); - - if (do_rx && rx_tail != len) - return -EIO; - - if (!rx_tail) + if (!do_rx) return 0; len = 0; From ea01e8a4cdff627cbc417d1bf945bf34df9afa9d Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Tue, 17 Dec 2013 21:42:09 +0100 Subject: [PATCH 042/112] spi/bcm63xx: check return value of clk_prepare_enable Ensure we notice if the clock cannot be enabled for any reason and pass the error down. Signed-off-by: Jonas Gorski Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c index e20a669c190c..db6a47d7b48c 100644 --- a/drivers/spi/spi-bcm63xx.c +++ b/drivers/spi/spi-bcm63xx.c @@ -399,7 +399,10 @@ static int bcm63xx_spi_probe(struct platform_device *pdev) } /* Initialize hardware */ - clk_prepare_enable(bs->clk); + ret = clk_prepare_enable(bs->clk); + if (ret) + goto out_err; + bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS); /* register and we are done */ @@ -452,8 +455,11 @@ static int bcm63xx_spi_resume(struct device *dev) { struct spi_master *master = dev_get_drvdata(dev); struct bcm63xx_spi *bs = spi_master_get_devdata(master); + int ret; - clk_prepare_enable(bs->clk); + ret = clk_prepare_enable(bs->clk); + if (ret) + return ret; spi_master_resume(master); From 1bae20285b6f8a692676a4489309bcad581c3f68 Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Tue, 17 Dec 2013 21:42:10 +0100 Subject: [PATCH 043/112] spi/bcm63xx: fix pm sleep support Use the correct symbol to guard the callbacks and use appropriate defines for setting up the ops struct. Signed-off-by: Jonas Gorski Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c index db6a47d7b48c..b440b0fef77b 100644 --- a/drivers/spi/spi-bcm63xx.c +++ b/drivers/spi/spi-bcm63xx.c @@ -438,7 +438,7 @@ static int bcm63xx_spi_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int bcm63xx_spi_suspend(struct device *dev) { struct spi_master *master = dev_get_drvdata(dev); @@ -465,22 +465,17 @@ static int bcm63xx_spi_resume(struct device *dev) return 0; } +#endif static const struct dev_pm_ops bcm63xx_spi_pm_ops = { - .suspend = bcm63xx_spi_suspend, - .resume = bcm63xx_spi_resume, + SET_SYSTEM_SLEEP_PM_OPS(bcm63xx_spi_suspend, bcm63xx_spi_resume) }; -#define BCM63XX_SPI_PM_OPS (&bcm63xx_spi_pm_ops) -#else -#define BCM63XX_SPI_PM_OPS NULL -#endif - static struct platform_driver bcm63xx_spi_driver = { .driver = { .name = "bcm63xx-spi", .owner = THIS_MODULE, - .pm = BCM63XX_SPI_PM_OPS, + .pm = &bcm63xx_spi_pm_ops, }, .probe = bcm63xx_spi_probe, .remove = bcm63xx_spi_remove, From 9637b86fd1b75c913b42957b322d0871464f5a1b Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Fri, 15 Nov 2013 15:50:59 +0800 Subject: [PATCH 044/112] spi: bcm63xx: fix reference leak to master in bcm63xx_spi_remove() Once a spi_master_get() call succeeds, we need an additional spi_master_put() call to free the memory, otherwise we will leak a reference to master. Fix by removing the unnecessary spi_master_get() call. Fixes: 247263dba208 ('spi: bcm63xx: use devm_spi_register_master()') Signed-off-by: Wei Yongjun Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c index 89331cd0ddaa..dceb7b216f46 100644 --- a/drivers/spi/spi-bcm63xx.c +++ b/drivers/spi/spi-bcm63xx.c @@ -433,7 +433,7 @@ out: static int bcm63xx_spi_remove(struct platform_device *pdev) { - struct spi_master *master = spi_master_get(platform_get_drvdata(pdev)); + struct spi_master *master = platform_get_drvdata(pdev); struct bcm63xx_spi *bs = spi_master_get_devdata(master); /* reset spi block */ From 7519459da294680bbab1bd20a4e378d83a1c6d45 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Mon, 9 Dec 2013 19:18:18 +0900 Subject: [PATCH 045/112] spi: nuc900: Use devm_*() functions Use devm_*() functions to make cleanup paths simpler. Signed-off-by: Jingoo Han Acked-by: Wan ZongShun Signed-off-by: Mark Brown --- drivers/spi/spi-nuc900.c | 50 ++++++++-------------------------------- 1 file changed, 10 insertions(+), 40 deletions(-) diff --git a/drivers/spi/spi-nuc900.c b/drivers/spi/spi-nuc900.c index e0c32bc69ee2..43d340ca0730 100644 --- a/drivers/spi/spi-nuc900.c +++ b/drivers/spi/spi-nuc900.c @@ -57,7 +57,6 @@ struct nuc900_spi { const unsigned char *tx; unsigned char *rx; struct clk *clk; - struct resource *ioarea; struct spi_master *master; struct spi_device *curdev; struct device *dev; @@ -344,8 +343,7 @@ static int nuc900_spi_probe(struct platform_device *pdev) master = spi_alloc_master(&pdev->dev, sizeof(struct nuc900_spi)); if (master == NULL) { dev_err(&pdev->dev, "No memory for spi_master\n"); - err = -ENOMEM; - goto err_nomem; + return -ENOMEM; } hw = spi_master_get_devdata(master); @@ -376,40 +374,31 @@ static int nuc900_spi_probe(struct platform_device *pdev) goto err_pdata; } - hw->ioarea = request_mem_region(hw->res->start, - resource_size(hw->res), pdev->name); - - if (hw->ioarea == NULL) { - dev_err(&pdev->dev, "Cannot reserve region\n"); - err = -ENXIO; + hw->regs = devm_ioremap_resource(&pdev->dev, hw->res); + if (IS_ERR(hw->regs)) { + err = PTR_ERR(hw->regs); goto err_pdata; } - hw->regs = ioremap(hw->res->start, resource_size(hw->res)); - if (hw->regs == NULL) { - dev_err(&pdev->dev, "Cannot map IO\n"); - err = -ENXIO; - goto err_iomap; - } - hw->irq = platform_get_irq(pdev, 0); if (hw->irq < 0) { dev_err(&pdev->dev, "No IRQ specified\n"); err = -ENOENT; - goto err_irq; + goto err_pdata; } - err = request_irq(hw->irq, nuc900_spi_irq, 0, pdev->name, hw); + err = devm_request_irq(&pdev->dev, hw->irq, nuc900_spi_irq, 0, + pdev->name, hw); if (err) { dev_err(&pdev->dev, "Cannot claim IRQ\n"); - goto err_irq; + goto err_pdata; } - hw->clk = clk_get(&pdev->dev, "spi"); + hw->clk = devm_clk_get(&pdev->dev, "spi"); if (IS_ERR(hw->clk)) { dev_err(&pdev->dev, "No clock for device\n"); err = PTR_ERR(hw->clk); - goto err_clk; + goto err_pdata; } mfp_set_groupg(&pdev->dev, NULL); @@ -425,17 +414,8 @@ static int nuc900_spi_probe(struct platform_device *pdev) err_register: clk_disable(hw->clk); - clk_put(hw->clk); -err_clk: - free_irq(hw->irq, hw); -err_irq: - iounmap(hw->regs); -err_iomap: - release_mem_region(hw->res->start, resource_size(hw->res)); - kfree(hw->ioarea); err_pdata: spi_master_put(hw->master); -err_nomem: return err; } @@ -443,18 +423,8 @@ static int nuc900_spi_remove(struct platform_device *dev) { struct nuc900_spi *hw = platform_get_drvdata(dev); - free_irq(hw->irq, hw); - spi_bitbang_stop(&hw->bitbang); - clk_disable(hw->clk); - clk_put(hw->clk); - - iounmap(hw->regs); - - release_mem_region(hw->res->start, resource_size(hw->res)); - kfree(hw->ioarea); - spi_master_put(hw->master); return 0; } From 5b3bb5963ff23a344062aba04937533a6f575761 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Mon, 9 Dec 2013 19:12:03 +0900 Subject: [PATCH 046/112] spi: davinci: Use devm_*() functions Use devm_*() functions to make cleanup paths simpler. Signed-off-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-davinci.c | 41 +++++++++++---------------------------- 1 file changed, 11 insertions(+), 30 deletions(-) diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c index d3f638613b40..79d40c8b1cd0 100644 --- a/drivers/spi/spi-davinci.c +++ b/drivers/spi/spi-davinci.c @@ -853,7 +853,7 @@ static int davinci_spi_probe(struct platform_device *pdev) struct spi_master *master; struct davinci_spi *dspi; struct davinci_spi_platform_data *pdata; - struct resource *r, *mem; + struct resource *r; resource_size_t dma_rx_chan = SPI_NO_RESOURCE; resource_size_t dma_tx_chan = SPI_NO_RESOURCE; int i = 0, ret = 0; @@ -894,39 +894,33 @@ static int davinci_spi_probe(struct platform_device *pdev) dspi->pbase = r->start; - mem = request_mem_region(r->start, resource_size(r), pdev->name); - if (mem == NULL) { - ret = -EBUSY; + dspi->base = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(dspi->base)) { + ret = PTR_ERR(dspi->base); goto free_master; } - dspi->base = ioremap(r->start, resource_size(r)); - if (dspi->base == NULL) { - ret = -ENOMEM; - goto release_region; - } - dspi->irq = platform_get_irq(pdev, 0); if (dspi->irq <= 0) { ret = -EINVAL; - goto unmap_io; + goto free_master; } - ret = request_threaded_irq(dspi->irq, davinci_spi_irq, dummy_thread_fn, - 0, dev_name(&pdev->dev), dspi); + ret = devm_request_threaded_irq(&pdev->dev, dspi->irq, davinci_spi_irq, + dummy_thread_fn, 0, dev_name(&pdev->dev), dspi); if (ret) - goto unmap_io; + goto free_master; dspi->bitbang.master = master; if (dspi->bitbang.master == NULL) { ret = -ENODEV; - goto irq_free; + goto free_master; } - dspi->clk = clk_get(&pdev->dev, NULL); + dspi->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(dspi->clk)) { ret = -ENODEV; - goto irq_free; + goto free_master; } clk_prepare_enable(dspi->clk); @@ -1015,13 +1009,6 @@ free_dma: dma_release_channel(dspi->dma_tx); free_clk: clk_disable_unprepare(dspi->clk); - clk_put(dspi->clk); -irq_free: - free_irq(dspi->irq, dspi); -unmap_io: - iounmap(dspi->base); -release_region: - release_mem_region(dspi->pbase, resource_size(r)); free_master: spi_master_put(master); err: @@ -1041,7 +1028,6 @@ static int davinci_spi_remove(struct platform_device *pdev) { struct davinci_spi *dspi; struct spi_master *master; - struct resource *r; master = platform_get_drvdata(pdev); dspi = spi_master_get_devdata(master); @@ -1049,11 +1035,6 @@ static int davinci_spi_remove(struct platform_device *pdev) spi_bitbang_stop(&dspi->bitbang); clk_disable_unprepare(dspi->clk); - clk_put(dspi->clk); - free_irq(dspi->irq, dspi); - iounmap(dspi->base); - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(dspi->pbase, resource_size(r)); spi_master_put(master); return 0; From a6f4c8e06b7258fd14033e20499d9a4e98aa1b7e Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Mon, 9 Dec 2013 19:14:58 +0900 Subject: [PATCH 047/112] spi: ath79: Use devm_*() functions Use devm_*() functions to make cleanup paths simpler. Signed-off-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-ath79.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c index 821bf7ac218d..31534b51715a 100644 --- a/drivers/spi/spi-ath79.c +++ b/drivers/spi/spi-ath79.c @@ -243,21 +243,21 @@ static int ath79_spi_probe(struct platform_device *pdev) goto err_put_master; } - sp->base = ioremap(r->start, resource_size(r)); + sp->base = devm_ioremap(&pdev->dev, r->start, resource_size(r)); if (!sp->base) { ret = -ENXIO; goto err_put_master; } - sp->clk = clk_get(&pdev->dev, "ahb"); + sp->clk = devm_clk_get(&pdev->dev, "ahb"); if (IS_ERR(sp->clk)) { ret = PTR_ERR(sp->clk); - goto err_unmap; + goto err_put_master; } ret = clk_enable(sp->clk); if (ret) - goto err_clk_put; + goto err_put_master; rate = DIV_ROUND_UP(clk_get_rate(sp->clk), MHZ); if (!rate) { @@ -280,10 +280,6 @@ err_disable: ath79_spi_disable(sp); err_clk_disable: clk_disable(sp->clk); -err_clk_put: - clk_put(sp->clk); -err_unmap: - iounmap(sp->base); err_put_master: spi_master_put(sp->bitbang.master); @@ -297,8 +293,6 @@ static int ath79_spi_remove(struct platform_device *pdev) spi_bitbang_stop(&sp->bitbang); ath79_spi_disable(sp); clk_disable(sp->clk); - clk_put(sp->clk); - iounmap(sp->base); spi_master_put(sp->bitbang.master); return 0; From c9f722e879953f74d3e09023ba339c98d68f1998 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Mon, 9 Dec 2013 19:19:13 +0900 Subject: [PATCH 048/112] spi: s3c24xx: Use devm_*() functions Use devm_*() functions to make cleanup paths simpler. Signed-off-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-s3c24xx.c | 67 ++++++++------------------------------- 1 file changed, 14 insertions(+), 53 deletions(-) diff --git a/drivers/spi/spi-s3c24xx.c b/drivers/spi/spi-s3c24xx.c index 0dc32a11bd3c..ebf80bbc93b3 100644 --- a/drivers/spi/spi-s3c24xx.c +++ b/drivers/spi/spi-s3c24xx.c @@ -78,7 +78,6 @@ struct s3c24xx_spi { unsigned char *rx; struct clk *clk; - struct resource *ioarea; struct spi_master *master; struct spi_device *curdev; struct device *dev; @@ -517,8 +516,7 @@ static int s3c24xx_spi_probe(struct platform_device *pdev) master = spi_alloc_master(&pdev->dev, sizeof(struct s3c24xx_spi)); if (master == NULL) { dev_err(&pdev->dev, "No memory for spi_master\n"); - err = -ENOMEM; - goto err_nomem; + return -ENOMEM; } hw = spi_master_get_devdata(master); @@ -567,43 +565,34 @@ static int s3c24xx_spi_probe(struct platform_device *pdev) if (res == NULL) { dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n"); err = -ENOENT; - goto err_no_iores; + goto err_no_pdata; } - hw->ioarea = request_mem_region(res->start, resource_size(res), - pdev->name); - - if (hw->ioarea == NULL) { - dev_err(&pdev->dev, "Cannot reserve region\n"); - err = -ENXIO; - goto err_no_iores; - } - - hw->regs = ioremap(res->start, resource_size(res)); - if (hw->regs == NULL) { - dev_err(&pdev->dev, "Cannot map IO\n"); - err = -ENXIO; - goto err_no_iomap; + hw->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(hw->regs)) { + err = PTR_ERR(hw->regs); + goto err_no_pdata; } hw->irq = platform_get_irq(pdev, 0); if (hw->irq < 0) { dev_err(&pdev->dev, "No IRQ specified\n"); err = -ENOENT; - goto err_no_irq; + goto err_no_pdata; } - err = request_irq(hw->irq, s3c24xx_spi_irq, 0, pdev->name, hw); + err = devm_request_irq(&pdev->dev, hw->irq, s3c24xx_spi_irq, 0, + pdev->name, hw); if (err) { dev_err(&pdev->dev, "Cannot claim IRQ\n"); - goto err_no_irq; + goto err_no_pdata; } - hw->clk = clk_get(&pdev->dev, "spi"); + hw->clk = devm_clk_get(&pdev->dev, "spi"); if (IS_ERR(hw->clk)) { dev_err(&pdev->dev, "No clock for device\n"); err = PTR_ERR(hw->clk); - goto err_no_clk; + goto err_no_pdata; } /* setup any gpio we can */ @@ -615,7 +604,8 @@ static int s3c24xx_spi_probe(struct platform_device *pdev) goto err_register; } - err = gpio_request(pdata->pin_cs, dev_name(&pdev->dev)); + err = devm_gpio_request(&pdev->dev, pdata->pin_cs, + dev_name(&pdev->dev)); if (err) { dev_err(&pdev->dev, "Failed to get gpio for cs\n"); goto err_register; @@ -639,27 +629,10 @@ static int s3c24xx_spi_probe(struct platform_device *pdev) return 0; err_register: - if (hw->set_cs == s3c24xx_spi_gpiocs) - gpio_free(pdata->pin_cs); - clk_disable(hw->clk); - clk_put(hw->clk); - err_no_clk: - free_irq(hw->irq, hw); - - err_no_irq: - iounmap(hw->regs); - - err_no_iomap: - release_resource(hw->ioarea); - kfree(hw->ioarea); - - err_no_iores: err_no_pdata: spi_master_put(hw->master); - - err_nomem: return err; } @@ -668,19 +641,7 @@ static int s3c24xx_spi_remove(struct platform_device *dev) struct s3c24xx_spi *hw = platform_get_drvdata(dev); spi_bitbang_stop(&hw->bitbang); - clk_disable(hw->clk); - clk_put(hw->clk); - - free_irq(hw->irq, hw); - iounmap(hw->regs); - - if (hw->set_cs == s3c24xx_spi_gpiocs) - gpio_free(hw->pdata->pin_cs); - - release_resource(hw->ioarea); - kfree(hw->ioarea); - spi_master_put(hw->master); return 0; } From 18e34d568efa5f1f8b75a76400dbd06c7811c73b Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Mon, 9 Dec 2013 19:23:12 +0900 Subject: [PATCH 049/112] spi: txx9: Use devm_clk_get() Use devm_clk_get() to make cleanup paths simpler. Signed-off-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-txx9.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-txx9.c b/drivers/spi/spi-txx9.c index 637cce2b8bdd..b206de1616d5 100644 --- a/drivers/spi/spi-txx9.c +++ b/drivers/spi/spi-txx9.c @@ -348,7 +348,7 @@ static int txx9spi_probe(struct platform_device *dev) INIT_LIST_HEAD(&c->queue); init_waitqueue_head(&c->waitq); - c->clk = clk_get(&dev->dev, "spi-baseclk"); + c->clk = devm_clk_get(&dev->dev, "spi-baseclk"); if (IS_ERR(c->clk)) { ret = PTR_ERR(c->clk); c->clk = NULL; @@ -415,10 +415,8 @@ exit_busy: exit: if (c->workqueue) destroy_workqueue(c->workqueue); - if (c->clk) { + if (c->clk) clk_disable(c->clk); - clk_put(c->clk); - } spi_master_put(master); return ret; } @@ -430,7 +428,6 @@ static int txx9spi_remove(struct platform_device *dev) destroy_workqueue(c->workqueue); clk_disable(c->clk); - clk_put(c->clk); return 0; } From 08bc0544a52e9c03457d00750ab2acd0c4f93da7 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Mon, 9 Dec 2013 19:25:00 +0900 Subject: [PATCH 050/112] spi: bcm2835: Use devm_request_irq() Use devm_request_irq() to make cleanup paths simpler. Signed-off-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-bcm2835.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c index 9025edd7dc45..8a89dd1f2654 100644 --- a/drivers/spi/spi-bcm2835.c +++ b/drivers/spi/spi-bcm2835.c @@ -347,8 +347,8 @@ static int bcm2835_spi_probe(struct platform_device *pdev) clk_prepare_enable(bs->clk); - err = request_irq(bs->irq, bcm2835_spi_interrupt, 0, - dev_name(&pdev->dev), master); + err = devm_request_irq(&pdev->dev, bs->irq, bcm2835_spi_interrupt, 0, + dev_name(&pdev->dev), master); if (err) { dev_err(&pdev->dev, "could not request IRQ: %d\n", err); goto out_clk_disable; @@ -361,13 +361,11 @@ static int bcm2835_spi_probe(struct platform_device *pdev) err = devm_spi_register_master(&pdev->dev, master); if (err) { dev_err(&pdev->dev, "could not register SPI master: %d\n", err); - goto out_free_irq; + goto out_clk_disable; } return 0; -out_free_irq: - free_irq(bs->irq, master); out_clk_disable: clk_disable_unprepare(bs->clk); out_master_put: @@ -380,8 +378,6 @@ static int bcm2835_spi_remove(struct platform_device *pdev) struct spi_master *master = platform_get_drvdata(pdev); struct bcm2835_spi *bs = spi_master_get_devdata(master); - free_irq(bs->irq, master); - /* Clear FIFOs, and disable the HW block */ bcm2835_wr(bs, BCM2835_SPI_CS, BCM2835_SPI_CS_CLEAR_RX | BCM2835_SPI_CS_CLEAR_TX); From e1d0cd473be4c88f823fa55e880ca6ae05d685f6 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Wed, 18 Dec 2013 10:31:15 +0900 Subject: [PATCH 051/112] spi: mpc512x: Use devm_*() functions Use devm_*() functions to make cleanup paths simpler. Signed-off-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-mpc512x-psc.c | 18 +++++------------- 1 file changed, 5 insertions(+), 13 deletions(-) diff --git a/drivers/spi/spi-mpc512x-psc.c b/drivers/spi/spi-mpc512x-psc.c index 9602bbd8d7ea..d7a73ef85e46 100644 --- a/drivers/spi/spi-mpc512x-psc.c +++ b/drivers/spi/spi-mpc512x-psc.c @@ -504,7 +504,7 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr, master->cleanup = mpc512x_psc_spi_cleanup; master->dev.of_node = dev->of_node; - tempp = ioremap(regaddr, size); + tempp = devm_ioremap(dev, regaddr, size); if (!tempp) { dev_err(dev, "could not ioremap I/O port range\n"); ret = -EFAULT; @@ -513,9 +513,8 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr, mps->psc = tempp; mps->fifo = (struct mpc512x_psc_fifo *)(tempp + sizeof(struct mpc52xx_psc)); - - ret = request_irq(mps->irq, mpc512x_psc_spi_isr, IRQF_SHARED, - "mpc512x-psc-spi", mps); + ret = devm_request_irq(dev, mps->irq, mpc512x_psc_spi_isr, IRQF_SHARED, + "mpc512x-psc-spi", mps); if (ret) goto free_master; init_completion(&mps->txisrdone); @@ -525,11 +524,11 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr, clk = devm_clk_get(dev, clk_name); if (IS_ERR(clk)) { ret = PTR_ERR(clk); - goto free_irq; + goto free_master; } ret = clk_prepare_enable(clk); if (ret) - goto free_irq; + goto free_master; mps->clk_mclk = clk; mps->mclk_rate = clk_get_rate(clk); @@ -545,11 +544,7 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr, free_clock: clk_disable_unprepare(mps->clk_mclk); -free_irq: - free_irq(mps->irq, mps); free_master: - if (mps->psc) - iounmap(mps->psc); spi_master_put(master); return ret; @@ -561,9 +556,6 @@ static int mpc512x_psc_spi_do_remove(struct device *dev) struct mpc512x_psc_spi *mps = spi_master_get_devdata(master); clk_disable_unprepare(mps->clk_mclk); - free_irq(mps->irq, mps); - if (mps->psc) - iounmap(mps->psc); return 0; } From 6b3938aed04587dab42f9df83122a40c596f495a Mon Sep 17 00:00:00 2001 From: Sourav Poddar Date: Fri, 6 Dec 2013 19:54:43 +0530 Subject: [PATCH 052/112] spi/qspi: parse register by name. Modify the qspi driver to parse reg information by name. If "reg names" is not found, then revert back to normal get resource. Signed-off-by: Sourav Poddar Signed-off-by: Mark Brown --- drivers/spi/spi-ti-qspi.c | 53 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 51 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index 0b71270fbf67..1211b663c814 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -46,6 +46,8 @@ struct ti_qspi { struct spi_master *master; void __iomem *base; + void __iomem *ctrl_base; + void __iomem *mmap_base; struct clk *fclk; struct device *dev; @@ -54,6 +56,8 @@ struct ti_qspi { u32 spi_max_frequency; u32 cmd; u32 dc; + + bool ctrl_mod; }; #define QSPI_PID (0x0) @@ -437,7 +441,7 @@ static int ti_qspi_probe(struct platform_device *pdev) { struct ti_qspi *qspi; struct spi_master *master; - struct resource *r; + struct resource *r, *res_ctrl, *res_mmap; struct device_node *np = pdev->dev.of_node; u32 max_freq; int ret = 0, num_cs, irq; @@ -465,7 +469,35 @@ static int ti_qspi_probe(struct platform_device *pdev) qspi->master = master; qspi->dev = &pdev->dev; - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi_base"); + if (r == NULL) { + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (r == NULL) { + dev_err(&pdev->dev, "missing platform data\n"); + return -ENODEV; + } + } + + res_mmap = platform_get_resource_byname(pdev, + IORESOURCE_MEM, "qspi_mmap"); + if (res_mmap == NULL) { + res_mmap = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (res_mmap == NULL) { + dev_err(&pdev->dev, + "memory mapped resource not required\n"); + return -ENODEV; + } + } + + res_ctrl = platform_get_resource_byname(pdev, + IORESOURCE_MEM, "qspi_ctrlmod"); + if (res_ctrl == NULL) { + res_ctrl = platform_get_resource(pdev, IORESOURCE_MEM, 2); + if (res_ctrl == NULL) { + dev_dbg(&pdev->dev, + "control module resources not required\n"); + } + } irq = platform_get_irq(pdev, 0); if (irq < 0) { @@ -481,6 +513,23 @@ static int ti_qspi_probe(struct platform_device *pdev) goto free_master; } + if (res_ctrl) { + qspi->ctrl_mod = true; + qspi->ctrl_base = devm_ioremap_resource(&pdev->dev, res_ctrl); + if (IS_ERR(qspi->ctrl_base)) { + ret = PTR_ERR(qspi->ctrl_base); + goto free_master; + } + } + + if (res_mmap) { + qspi->mmap_base = devm_ioremap_resource(&pdev->dev, res_mmap); + if (IS_ERR(qspi->mmap_base)) { + ret = PTR_ERR(qspi->mmap_base); + goto free_master; + } + } + ret = devm_request_irq(&pdev->dev, irq, ti_qspi_isr, 0, dev_name(&pdev->dev), qspi); if (ret < 0) { From 52690a6a868719d1d2f9e12b039c05d966600d41 Mon Sep 17 00:00:00 2001 From: Sourav Poddar Date: Fri, 6 Dec 2013 19:54:49 +0530 Subject: [PATCH 053/112] spi/qspi: update binding information These update binding information for ti qspi controller. Signed-off-by: Sourav Poddar Signed-off-by: Mark Brown --- Documentation/devicetree/bindings/spi/ti_qspi.txt | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/spi/ti_qspi.txt b/Documentation/devicetree/bindings/spi/ti_qspi.txt index 1f9641ade0b5..601a360531a5 100644 --- a/Documentation/devicetree/bindings/spi/ti_qspi.txt +++ b/Documentation/devicetree/bindings/spi/ti_qspi.txt @@ -3,6 +3,11 @@ TI QSPI controller. Required properties: - compatible : should be "ti,dra7xxx-qspi" or "ti,am4372-qspi". - reg: Should contain QSPI registers location and length. +- reg-names: Should contain the resource reg names. + - qspi_base: Qspi configuration register Address space + - qspi_mmap: Memory mapped Address space + - (optional) qspi_ctrlmod: Control module Address space +- interrupts: should contain the qspi interrupt number. - #address-cells, #size-cells : Must be present if the device has sub-nodes - ti,hwmods: Name of the hwmod associated to the QSPI @@ -14,7 +19,8 @@ Example: qspi: qspi@4b300000 { compatible = "ti,dra7xxx-qspi"; - reg = <0x4b300000 0x100>; + reg = <0x47900000 0x100>, <0x30000000 0x3ffffff>; + reg-names = "qspi_base", "qspi_mmap"; #address-cells = <1>; #size-cells = <0>; spi-max-frequency = <25000000>; From 6fd8b8503a0dcf66510314dc054745087ae89f94 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Wed, 18 Dec 2013 18:31:47 +0100 Subject: [PATCH 054/112] spi: spi-imx: Fix out-of-order CS/SCLK operation at low speeds Problem: -------- The problem this patch addresses has the following assumptions about the SPI bus setup: - The hardware used to find this is Freescale i.MX537 @ 1200MHz - The SPI SCLK operate at very low speed, less than 200 kHz - There are two SPI devices attached to the bus - Each device uses different GPIO for chipselect - Each device requires different SCLK signal polarity The observation of the SCLK and GPIO chipselect lines with a logic analyzer shows, that the SCLK polarity change does sometimes happen after the GPIO chipselect is asserted. The SPI slave device reacts on that by counting the SCLK polarity change as a clock pulse, which disrupts the communication with the SPI slave device. Explanation: ------------ We found an interesting correlation, that the maximum delay between the write into the ECSPIx_CONFIGREG register and the change of SCLK polarity at each SCLK frequency of 10 kHz, 20 kHz, 50 kHz and 100 kHz is 100 uS, 50 uS, 20 uS and 10 uS respectively. This lead us to a theory, that at SCLK frequency of 1 Hz, the delay would be 1 S. Therefore, the time it takes for the write to ECSPIx_CONFIGREG to take effect in the hardware is up to the duration of 1 tick of the SCLK clock. During this delay period, if the SCLK frequency is too low, the execution of the spi-imx.c driver can advance so much, that the GPIO chipselect will be asserted. The GPIO chipselect is asserted almost immediatelly. Solution: --------- The solution this patch presents is simple. We calculate the resulting SCLK clock first by dividing the ECSPI block clock by both dividers that are to be programmed into the configuration register. Based on the resulting SCLK clock, we derive the delay it will take for the changes to get really applied. We are extra careful here so we delay twice as long as we should. Note that the patch does not create additional overhead at high speeds as the delay will likely be close to zero there. Signed-off-by: Marek Vasut To: linux-spi@vger.kernel.org Cc: Fabio Estevam Cc: Huang Shijie Cc: Mark Brown Cc: Sascha Hauer Cc: Shawn Guo Signed-off-by: Mark Brown --- drivers/spi/spi-imx.c | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index b80f2f70fef7..a5474ef9d2a0 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -206,7 +206,8 @@ static unsigned int spi_imx_clkdiv_2(unsigned int fin, #define MX51_ECSPI_STAT_RR (1 << 3) /* MX51 eCSPI */ -static unsigned int mx51_ecspi_clkdiv(unsigned int fin, unsigned int fspi) +static unsigned int mx51_ecspi_clkdiv(unsigned int fin, unsigned int fspi, + unsigned int *fres) { /* * there are two 4-bit dividers, the pre-divider divides by @@ -234,6 +235,10 @@ static unsigned int mx51_ecspi_clkdiv(unsigned int fin, unsigned int fspi) pr_debug("%s: fin: %u, fspi: %u, post: %u, pre: %u\n", __func__, fin, fspi, post, pre); + + /* Resulting frequency for the SCLK line. */ + *fres = (fin / (pre + 1)) >> post; + return (pre << MX51_ECSPI_CTRL_PREDIV_OFFSET) | (post << MX51_ECSPI_CTRL_POSTDIV_OFFSET); } @@ -264,6 +269,7 @@ static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx, struct spi_imx_config *config) { u32 ctrl = MX51_ECSPI_CTRL_ENABLE, cfg = 0; + u32 clk = config->speed_hz, delay; /* * The hardware seems to have a race condition when changing modes. The @@ -275,7 +281,7 @@ static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx, ctrl |= MX51_ECSPI_CTRL_MODE_MASK; /* set clock speed */ - ctrl |= mx51_ecspi_clkdiv(spi_imx->spi_clk, config->speed_hz); + ctrl |= mx51_ecspi_clkdiv(spi_imx->spi_clk, config->speed_hz, &clk); /* set chip select to use */ ctrl |= MX51_ECSPI_CTRL_CS(config->cs); @@ -297,6 +303,23 @@ static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx, writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL); writel(cfg, spi_imx->base + MX51_ECSPI_CONFIG); + /* + * Wait until the changes in the configuration register CONFIGREG + * propagate into the hardware. It takes exactly one tick of the + * SCLK clock, but we will wait two SCLK clock just to be sure. The + * effect of the delay it takes for the hardware to apply changes + * is noticable if the SCLK clock run very slow. In such a case, if + * the polarity of SCLK should be inverted, the GPIO ChipSelect might + * be asserted before the SCLK polarity changes, which would disrupt + * the SPI communication as the device on the other end would consider + * the change of SCLK polarity as a clock tick already. + */ + delay = (2 * 1000000) / clk; + if (likely(delay < 10)) /* SCLK is faster than 100 kHz */ + udelay(delay); + else /* SCLK is _very_ slow */ + usleep_range(delay, delay + 10); + return 0; } From 8f51c8108267443865d8ec08403b66da9905ba14 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Fri, 20 Dec 2013 10:22:20 +0800 Subject: [PATCH 055/112] spi: spi-s3c24xx: remove redundant return value check of platform_get_resource() Remove unneeded error handling on the result of a call to platform_get_resource() when the value is passed to devm_ioremap_resource(). Signed-off-by: Wei Yongjun Reviewed-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-s3c24xx.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/drivers/spi/spi-s3c24xx.c b/drivers/spi/spi-s3c24xx.c index ebf80bbc93b3..2ccb28d57ba9 100644 --- a/drivers/spi/spi-s3c24xx.c +++ b/drivers/spi/spi-s3c24xx.c @@ -560,14 +560,7 @@ static int s3c24xx_spi_probe(struct platform_device *pdev) dev_dbg(hw->dev, "bitbang at %p\n", &hw->bitbang); /* find and map our resources */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n"); - err = -ENOENT; - goto err_no_pdata; - } - hw->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(hw->regs)) { err = PTR_ERR(hw->regs); From bdf0290ac70f5a09e85507bf6c84dc6a399dff82 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Fri, 20 Dec 2013 10:15:45 +0800 Subject: [PATCH 056/112] spi: txx9: drop clk_put for devm_clk_get in txx9spi_probe() devm_clk_get() is used so there is no reason to explicitly call clk_put() in txx9spi_probe() functions. Fixes: 18e34d568efa ('spi: txx9: Use devm_clk_get()') Signed-off-by: Wei Yongjun Reviewed-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-txx9.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/spi/spi-txx9.c b/drivers/spi/spi-txx9.c index b206de1616d5..c72a8f840b4b 100644 --- a/drivers/spi/spi-txx9.c +++ b/drivers/spi/spi-txx9.c @@ -356,7 +356,6 @@ static int txx9spi_probe(struct platform_device *dev) } ret = clk_enable(c->clk); if (ret) { - clk_put(c->clk); c->clk = NULL; goto exit; } From fe2ece4a933138bb1dcb66e9669a48e7c9215717 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Fri, 20 Dec 2013 10:21:54 +0800 Subject: [PATCH 057/112] spi: nuc900: remove redundant return value check of platform_get_resource() Remove unneeded error handling on the result of a call to platform_get_resource() when the value is passed to devm_ioremap_resource(). Signed-off-by: Wei Yongjun Reviewed-by: Jingoo Han Signed-off-by: Mark Brown --- drivers/spi/spi-nuc900.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/spi/spi-nuc900.c b/drivers/spi/spi-nuc900.c index 43d340ca0730..50406306bc20 100644 --- a/drivers/spi/spi-nuc900.c +++ b/drivers/spi/spi-nuc900.c @@ -368,12 +368,6 @@ static int nuc900_spi_probe(struct platform_device *pdev) hw->bitbang.txrx_bufs = nuc900_spi_txrx; hw->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (hw->res == NULL) { - dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n"); - err = -ENOENT; - goto err_pdata; - } - hw->regs = devm_ioremap_resource(&pdev->dev, hw->res); if (IS_ERR(hw->regs)) { err = PTR_ERR(hw->regs); From efd85acb4f2118348fc3a7c831872d5e70c7bec0 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Mon, 23 Dec 2013 19:34:23 +0100 Subject: [PATCH 058/112] spi: rspi: Fix NULL pointer dereference on SH7757 SH7757 doesn't pass platform data, in which case spi-rspi uses default parameters. However, commit 5ce0ba88650f2606244a761d92e2b725f4ab3583 ("spi: rcar: add Renesas QSPI support on RSPI") added a new user of the platform data, but forgot to check for its validity first, causing a NULL pointer dereference on SH7757. Add the missing check to fix this. Signed-off-by: Geert Uytterhoeven Acked-by: Simon Horman Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 58449ad4ad0d..b60862f58534 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -958,8 +958,9 @@ static int rspi_probe(struct platform_device *pdev) INIT_WORK(&rspi->ws, rspi_work); init_waitqueue_head(&rspi->wait); - master->num_chipselect = rspi_pd->num_chipselect; - if (!master->num_chipselect) + if (rspi_pd && rspi_pd->num_chipselect) + master->num_chipselect = rspi_pd->num_chipselect; + else master->num_chipselect = 2; /* default */ master->bus_num = pdev->id; From df900e678308d7fa1290681bfc336716b084b3c5 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Mon, 23 Dec 2013 19:34:24 +0100 Subject: [PATCH 059/112] spi: rspi: Fix typo when clearing SPSR_OVRF The overrun flag should be cleared in the SPI Status Register, not in the SPI Control Register, based on the SDK sample code. Signed-off-by: Geert Uytterhoeven Acked-by: Simon Horman Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index b60862f58534..7a185bf431ed 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -517,7 +517,7 @@ static void rspi_receive_init(struct rspi_data *rspi) rspi_read16(rspi, RSPI_SPDR); /* dummy read */ if (spsr & SPSR_OVRF) rspi_write8(rspi, rspi_read8(rspi, RSPI_SPSR) & ~SPSR_OVRF, - RSPI_SPCR); + RSPI_SPSR); } static int rspi_receive_pio(struct rspi_data *rspi, struct spi_message *mesg, From fc671a900b698e5aa35109100bb9a1598e914466 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 24 Dec 2013 10:49:30 +0100 Subject: [PATCH 060/112] spi: rspi: Use dev_get_platdata() instead of raw dev.platform_data access Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 58449ad4ad0d..e6aa42402850 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -904,7 +904,7 @@ static int rspi_probe(struct platform_device *pdev) struct rspi_data *rspi; int ret, irq; char clk_name[16]; - struct rspi_plat_data *rspi_pd = pdev->dev.platform_data; + struct rspi_plat_data *rspi_pd = dev_get_platdata(&pdev->dev); const struct spi_ops *ops; const struct platform_device_id *id_entry = pdev->id_entry; From c132f0949ab62ba95474f6eda44e9e1b5780b973 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 24 Dec 2013 10:49:31 +0100 Subject: [PATCH 061/112] spi: rspi: Remove casts Remove useless casts, and do not cast away const. Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 29 ++++++++++++++--------------- 1 file changed, 14 insertions(+), 15 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index e6aa42402850..73f1a29b22c3 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -330,9 +330,7 @@ static int rspi_send_pio(struct rspi_data *rspi, struct spi_message *mesg, struct spi_transfer *t) { int remain = t->len; - u8 *data; - - data = (u8 *)t->tx_buf; + const u8 *data = t->tx_buf; while (remain > 0) { rspi_write8(rspi, rspi_read8(rspi, RSPI_SPCR) | SPCR_TXMD, RSPI_SPCR); @@ -358,12 +356,11 @@ static int qspi_send_pio(struct rspi_data *rspi, struct spi_message *mesg, struct spi_transfer *t) { int remain = t->len; - u8 *data; + const u8 *data = t->tx_buf; rspi_write8(rspi, SPBFCR_TXRST, QSPI_SPBFCR); rspi_write8(rspi, 0x00, QSPI_SPBFCR); - data = (u8 *)t->tx_buf; while (remain > 0) { if (rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE) < 0) { @@ -399,8 +396,8 @@ static void rspi_dma_complete(void *arg) wake_up_interruptible(&rspi->wait); } -static int rspi_dma_map_sg(struct scatterlist *sg, void *buf, unsigned len, - struct dma_chan *chan, +static int rspi_dma_map_sg(struct scatterlist *sg, const void *buf, + unsigned len, struct dma_chan *chan, enum dma_transfer_direction dir) { sg_init_table(sg, 1); @@ -440,12 +437,13 @@ static void rspi_memory_from_8bit(void *buf, const void *data, unsigned len) static int rspi_send_dma(struct rspi_data *rspi, struct spi_transfer *t) { struct scatterlist sg; - void *buf = NULL; + const void *buf = NULL; struct dma_async_tx_descriptor *desc; unsigned len; int ret = 0; if (rspi->dma_width_16bit) { + void *tmp; /* * If DMAC bus width is 16-bit, the driver allocates a dummy * buffer. And, the driver converts original data into the @@ -454,13 +452,14 @@ static int rspi_send_dma(struct rspi_data *rspi, struct spi_transfer *t) * DMAC data: 1st byte, dummy, 2nd byte, dummy ... */ len = t->len * 2; - buf = kmalloc(len, GFP_KERNEL); - if (!buf) + tmp = kmalloc(len, GFP_KERNEL); + if (!tmp) return -ENOMEM; - rspi_memory_to_8bit(buf, t->tx_buf, t->len); + rspi_memory_to_8bit(tmp, t->tx_buf, t->len); + buf = tmp; } else { len = t->len; - buf = (void *)t->tx_buf; + buf = t->tx_buf; } if (!rspi_dma_map_sg(&sg, buf, len, rspi->chan_tx, DMA_TO_DEVICE)) { @@ -528,7 +527,7 @@ static int rspi_receive_pio(struct rspi_data *rspi, struct spi_message *mesg, rspi_receive_init(rspi); - data = (u8 *)t->rx_buf; + data = t->rx_buf; while (remain > 0) { rspi_write8(rspi, rspi_read8(rspi, RSPI_SPCR) & ~SPCR_TXMD, RSPI_SPCR); @@ -575,7 +574,7 @@ static int qspi_receive_pio(struct rspi_data *rspi, struct spi_message *mesg, qspi_receive_init(rspi); - data = (u8 *)t->rx_buf; + data = t->rx_buf; while (remain > 0) { if (rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE) < 0) { @@ -802,7 +801,7 @@ static void rspi_cleanup(struct spi_device *spi) static irqreturn_t rspi_irq(int irq, void *_sr) { - struct rspi_data *rspi = (struct rspi_data *)_sr; + struct rspi_data *rspi = _sr; unsigned long spsr; irqreturn_t ret = IRQ_NONE; unsigned char disable_irq = 0; From baf588f428e2b3bf91ac138e600c2e33c23cbfa3 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 24 Dec 2013 10:49:32 +0100 Subject: [PATCH 062/112] spi: rspi: Make more pointers const Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 37 ++++++++++++++++++++----------------- 1 file changed, 20 insertions(+), 17 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 73f1a29b22c3..aea0c62b095d 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -170,34 +170,35 @@ struct rspi_data { unsigned dma_callbacked:1; }; -static void rspi_write8(struct rspi_data *rspi, u8 data, u16 offset) +static void rspi_write8(const struct rspi_data *rspi, u8 data, u16 offset) { iowrite8(data, rspi->addr + offset); } -static void rspi_write16(struct rspi_data *rspi, u16 data, u16 offset) +static void rspi_write16(const struct rspi_data *rspi, u16 data, u16 offset) { iowrite16(data, rspi->addr + offset); } -static void rspi_write32(struct rspi_data *rspi, u32 data, u16 offset) +static void rspi_write32(const struct rspi_data *rspi, u32 data, u16 offset) { iowrite32(data, rspi->addr + offset); } -static u8 rspi_read8(struct rspi_data *rspi, u16 offset) +static u8 rspi_read8(const struct rspi_data *rspi, u16 offset) { return ioread8(rspi->addr + offset); } -static u16 rspi_read16(struct rspi_data *rspi, u16 offset) +static u16 rspi_read16(const struct rspi_data *rspi, u16 offset) { return ioread16(rspi->addr + offset); } /* optional functions */ struct spi_ops { - int (*set_config_register)(struct rspi_data *rspi, int access_size); + int (*set_config_register)(const struct rspi_data *rspi, + int access_size); int (*send_pio)(struct rspi_data *rspi, struct spi_message *mesg, struct spi_transfer *t); int (*receive_pio)(struct rspi_data *rspi, struct spi_message *mesg, @@ -208,7 +209,8 @@ struct spi_ops { /* * functions for RSPI */ -static int rspi_set_config_register(struct rspi_data *rspi, int access_size) +static int rspi_set_config_register(const struct rspi_data *rspi, + int access_size) { int spbr; @@ -243,7 +245,8 @@ static int rspi_set_config_register(struct rspi_data *rspi, int access_size) /* * functions for QSPI */ -static int qspi_set_config_register(struct rspi_data *rspi, int access_size) +static int qspi_set_config_register(const struct rspi_data *rspi, + int access_size) { u16 spcmd; int spbr; @@ -292,12 +295,12 @@ static int qspi_set_config_register(struct rspi_data *rspi, int access_size) #define set_config_register(spi, n) spi->ops->set_config_register(spi, n) -static void rspi_enable_irq(struct rspi_data *rspi, u8 enable) +static void rspi_enable_irq(const struct rspi_data *rspi, u8 enable) { rspi_write8(rspi, rspi_read8(rspi, RSPI_SPCR) | enable, RSPI_SPCR); } -static void rspi_disable_irq(struct rspi_data *rspi, u8 disable) +static void rspi_disable_irq(const struct rspi_data *rspi, u8 disable) { rspi_write8(rspi, rspi_read8(rspi, RSPI_SPCR) & ~disable, RSPI_SPCR); } @@ -316,12 +319,12 @@ static int rspi_wait_for_interrupt(struct rspi_data *rspi, u8 wait_mask, return 0; } -static void rspi_assert_ssl(struct rspi_data *rspi) +static void rspi_assert_ssl(const struct rspi_data *rspi) { rspi_write8(rspi, rspi_read8(rspi, RSPI_SPCR) | SPCR_SPE, RSPI_SPCR); } -static void rspi_negate_ssl(struct rspi_data *rspi) +static void rspi_negate_ssl(const struct rspi_data *rspi) { rspi_write8(rspi, rspi_read8(rspi, RSPI_SPCR) & ~SPCR_SPE, RSPI_SPCR); } @@ -507,7 +510,7 @@ end_nomap: return ret; } -static void rspi_receive_init(struct rspi_data *rspi) +static void rspi_receive_init(const struct rspi_data *rspi) { unsigned char spsr; @@ -555,7 +558,7 @@ static int rspi_receive_pio(struct rspi_data *rspi, struct spi_message *mesg, return 0; } -static void qspi_receive_init(struct rspi_data *rspi) +static void qspi_receive_init(const struct rspi_data *rspi) { unsigned char spsr; @@ -703,7 +706,7 @@ end_nomap: return ret; } -static int rspi_is_dma(struct rspi_data *rspi, struct spi_transfer *t) +static int rspi_is_dma(const struct rspi_data *rspi, struct spi_transfer *t) { if (t->tx_buf && rspi->chan_tx) return 1; @@ -824,7 +827,7 @@ 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 = dev_get_platdata(&pdev->dev); + const 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; @@ -903,7 +906,7 @@ static int rspi_probe(struct platform_device *pdev) struct rspi_data *rspi; int ret, irq; char clk_name[16]; - struct rspi_plat_data *rspi_pd = dev_get_platdata(&pdev->dev); + const struct rspi_plat_data *rspi_pd = dev_get_platdata(&pdev->dev); const struct spi_ops *ops; const struct platform_device_id *id_entry = pdev->id_entry; From 2aae80b27da6904939ed38959ee3d153f27ee7d1 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 24 Dec 2013 10:49:33 +0100 Subject: [PATCH 063/112] spi: rspi: Use DUMMY_DATA macro instead of hardcoded value Make it more obvious that this value is dummy data. Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index aea0c62b095d..d7920d95a03c 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -149,6 +149,8 @@ #define SPBFCR_TXRST 0x80 /* qspi only */ #define SPBFCR_RXRST 0x40 /* qspi only */ +#define DUMMY_DATA 0x00 + struct rspi_data { void __iomem *addr; u32 max_speed_hz; @@ -541,7 +543,7 @@ static int rspi_receive_pio(struct rspi_data *rspi, struct spi_message *mesg, return -ETIMEDOUT; } /* dummy write for generate clock */ - rspi_write16(rspi, 0x00, RSPI_SPDR); + rspi_write16(rspi, DUMMY_DATA, RSPI_SPDR); if (rspi_wait_for_interrupt(rspi, SPSR_SPRF, SPCR_SPRIE) < 0) { dev_err(&rspi->master->dev, @@ -586,7 +588,7 @@ static int qspi_receive_pio(struct rspi_data *rspi, struct spi_message *mesg, return -ETIMEDOUT; } /* dummy write for generate clock */ - rspi_write8(rspi, 0x00, RSPI_SPDR); + rspi_write8(rspi, DUMMY_DATA, RSPI_SPDR); if (rspi_wait_for_interrupt(rspi, SPSR_SPRF, SPCR_SPRIE) < 0) { dev_err(&rspi->master->dev, From 97b95c117020461874de44ac612892f281ed3e31 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 24 Dec 2013 10:49:34 +0100 Subject: [PATCH 064/112] spi: rspi: Use u8 for 8-bit register values Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index d7920d95a03c..627126ae2571 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -160,7 +160,7 @@ struct rspi_data { wait_queue_head_t wait; spinlock_t lock; struct clk *clk; - unsigned char spsr; + u8 spsr; const struct spi_ops *ops; /* for dmaengine */ @@ -514,7 +514,7 @@ end_nomap: static void rspi_receive_init(const struct rspi_data *rspi) { - unsigned char spsr; + u8 spsr; spsr = rspi_read8(rspi, RSPI_SPSR); if (spsr & SPSR_SPRF) @@ -562,7 +562,7 @@ static int rspi_receive_pio(struct rspi_data *rspi, struct spi_message *mesg, static void qspi_receive_init(const struct rspi_data *rspi) { - unsigned char spsr; + u8 spsr; spsr = rspi_read8(rspi, RSPI_SPSR); if (spsr & SPSR_SPRF) @@ -807,9 +807,9 @@ static void rspi_cleanup(struct spi_device *spi) static irqreturn_t rspi_irq(int irq, void *_sr) { struct rspi_data *rspi = _sr; - unsigned long spsr; + u8 spsr; irqreturn_t ret = IRQ_NONE; - unsigned char disable_irq = 0; + u8 disable_irq = 0; rspi->spsr = spsr = rspi_read8(rspi, RSPI_SPSR); if (spsr & SPSR_SPRF) From 368ca4e0c75612c0a4d6bbcef7efb944604340c2 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Thu, 26 Dec 2013 21:51:06 -0800 Subject: [PATCH 065/112] spi: Eliminate 3WIRE spi_transfer check Checking for SPI_3WIRE isn't needed. spi_setup() already prevents 3WIRE mode from being combined with DUAL or QUAD mode support. So there is no need to differentiate between a single bit device with SPI_3WIRE set and one with without. It doesn't change the allowed bit widths. Signed-off-by: Trent Piepho Signed-off-by: Mark Brown --- drivers/spi/spi.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 857ee8c407b1..2cd9fdc9c7f9 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1678,9 +1678,6 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) 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) { @@ -1694,9 +1691,6 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) 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; } } From 7c7ccc52fc7b6d75bb7604a59cc641fa6336b619 Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Mon, 30 Dec 2013 11:56:42 +0530 Subject: [PATCH 066/112] spi: nuc900: Cleanup spi-nuc900.h header Commit 54ecf4f05637 ("ARM: w90x900: move platform_data definitions") moved the file to the current location but forgot to remove the pointer to its previous location. Clean it up. While at it also change the header file protection macros appropriately. Signed-off-by: Sachin Kamat Signed-off-by: Mark Brown --- include/linux/platform_data/spi-nuc900.h | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/include/linux/platform_data/spi-nuc900.h b/include/linux/platform_data/spi-nuc900.h index 2c4e0c128501..4b3f46832e19 100644 --- a/include/linux/platform_data/spi-nuc900.h +++ b/include/linux/platform_data/spi-nuc900.h @@ -1,6 +1,4 @@ /* - * arch/arm/mach-w90x900/include/mach/nuc900_spi.h - * * Copyright (c) 2009 Nuvoton technology corporation. * * Wan ZongShun @@ -11,8 +9,8 @@ * */ -#ifndef __ASM_ARCH_SPI_H -#define __ASM_ARCH_SPI_H +#ifndef __SPI_NUC900_H +#define __SPI_NUC900_H extern void mfp_set_groupg(struct device *dev, const char *subname); @@ -32,4 +30,4 @@ struct nuc900_spi_chip { unsigned char bits_per_word; }; -#endif /* __ASM_ARCH_SPI_H */ +#endif /* __SPI_NUC900_H */ From 0a47d3c40428fb8174ea36ede35267ddc7042f34 Mon Sep 17 00:00:00 2001 From: Baruch Siach Date: Thu, 26 Dec 2013 09:00:15 +0200 Subject: [PATCH 067/112] spi: dw: drop unused struct dw_spi field Signed-off-by: Baruch Siach Signed-off-by: Mark Brown --- drivers/spi/spi-dw.c | 1 - drivers/spi/spi-dw.h | 1 - 2 files changed, 2 deletions(-) diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index b897c4adb39d..abf4fd5a2a25 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -427,7 +427,6 @@ static void pump_transfers(unsigned long data) dws->tx_end = dws->tx + transfer->len; dws->rx = transfer->rx_buf; dws->rx_end = dws->rx + transfer->len; - dws->cs_change = transfer->cs_change; dws->len = dws->cur_transfer->len; if (chip != dws->prev_chip) cs_change = 1; diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 9c57c078031e..5a5cd02ddb13 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -135,7 +135,6 @@ struct dw_spi { u8 n_bytes; /* current is a 1/2 bytes op */ u8 max_bits_per_word; /* maxim is 16b */ u32 dma_width; - int cs_change; irqreturn_t (*transfer_handler)(struct dw_spi *dws); void (*cs_control)(u32 command); From 04f421e7b0b10de3fae543dac4d324b449a1db6b Mon Sep 17 00:00:00 2001 From: Baruch Siach Date: Mon, 30 Dec 2013 20:30:44 +0200 Subject: [PATCH 068/112] spi: dw: use managed resources Migrate mmio code and core driver to managed resources to reduce boilerplate error handling code. Also, handle clk_enable() failure while at it, and drop unused dw_spi iolen field. Signed-off-by: Baruch Siach Signed-off-by: Mark Brown --- drivers/spi/spi-dw-mmio.c | 70 +++++++++++---------------------------- drivers/spi/spi-dw-pci.c | 40 ++++++---------------- drivers/spi/spi-dw.c | 20 ++++------- drivers/spi/spi-dw.h | 4 +-- 4 files changed, 37 insertions(+), 97 deletions(-) diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c index 168c620947f4..569adf877b16 100644 --- a/drivers/spi/spi-dw-mmio.c +++ b/drivers/spi/spi-dw-mmio.c @@ -30,14 +30,13 @@ static int dw_spi_mmio_probe(struct platform_device *pdev) { struct dw_spi_mmio *dwsmmio; struct dw_spi *dws; - struct resource *mem, *ioarea; + struct resource *mem; int ret; - dwsmmio = kzalloc(sizeof(struct dw_spi_mmio), GFP_KERNEL); - if (!dwsmmio) { - ret = -ENOMEM; - goto err_end; - } + dwsmmio = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_mmio), + GFP_KERNEL); + if (!dwsmmio) + return -ENOMEM; dws = &dwsmmio->dws; @@ -45,80 +44,51 @@ static int dw_spi_mmio_probe(struct platform_device *pdev) mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) { dev_err(&pdev->dev, "no mem resource?\n"); - ret = -EINVAL; - goto err_kfree; + return -EINVAL; } - ioarea = request_mem_region(mem->start, resource_size(mem), - pdev->name); - if (!ioarea) { - dev_err(&pdev->dev, "SPI region already claimed\n"); - ret = -EBUSY; - goto err_kfree; - } - - dws->regs = ioremap_nocache(mem->start, resource_size(mem)); - if (!dws->regs) { - dev_err(&pdev->dev, "SPI region already mapped\n"); - ret = -ENOMEM; - goto err_release_reg; + dws->regs = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(dws->regs)) { + dev_err(&pdev->dev, "SPI region map failed\n"); + return PTR_ERR(dws->regs); } dws->irq = platform_get_irq(pdev, 0); if (dws->irq < 0) { dev_err(&pdev->dev, "no irq resource?\n"); - ret = dws->irq; /* -ENXIO */ - goto err_unmap; + return dws->irq; /* -ENXIO */ } - dwsmmio->clk = clk_get(&pdev->dev, NULL); - if (IS_ERR(dwsmmio->clk)) { - ret = PTR_ERR(dwsmmio->clk); - goto err_unmap; - } - clk_enable(dwsmmio->clk); + dwsmmio->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(dwsmmio->clk)) + return PTR_ERR(dwsmmio->clk); + ret = clk_enable(dwsmmio->clk); + if (ret) + return ret; - dws->parent_dev = &pdev->dev; dws->bus_num = 0; dws->num_cs = 4; dws->max_freq = clk_get_rate(dwsmmio->clk); - ret = dw_spi_add_host(dws); + ret = dw_spi_add_host(&pdev->dev, dws); if (ret) - goto err_clk; + goto out; platform_set_drvdata(pdev, dwsmmio); return 0; -err_clk: +out: clk_disable(dwsmmio->clk); - clk_put(dwsmmio->clk); - dwsmmio->clk = NULL; -err_unmap: - iounmap(dws->regs); -err_release_reg: - release_mem_region(mem->start, resource_size(mem)); -err_kfree: - kfree(dwsmmio); -err_end: return ret; } static int dw_spi_mmio_remove(struct platform_device *pdev) { struct dw_spi_mmio *dwsmmio = platform_get_drvdata(pdev); - struct resource *mem; clk_disable(dwsmmio->clk); - clk_put(dwsmmio->clk); - dwsmmio->clk = NULL; - dw_spi_remove_host(&dwsmmio->dws); - iounmap(dwsmmio->dws.regs); - kfree(dwsmmio); - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(mem->start, resource_size(mem)); return 0; } diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c index 66fa9955ea14..760dc0017a33 100644 --- a/drivers/spi/spi-dw-pci.c +++ b/drivers/spi/spi-dw-pci.c @@ -43,35 +43,24 @@ static int spi_pci_probe(struct pci_dev *pdev, dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n", pdev->vendor, pdev->device); - ret = pci_enable_device(pdev); + ret = pcim_enable_device(pdev); if (ret) return ret; - dwpci = kzalloc(sizeof(struct dw_spi_pci), GFP_KERNEL); - if (!dwpci) { - ret = -ENOMEM; - goto err_disable; - } + dwpci = devm_kzalloc(&pdev-dev, sizeof(struct dw_spi_pci), GFP_KERNEL); + if (!dwpci) + return -ENOMEM; dwpci->pdev = pdev; dws = &dwpci->dws; /* Get basic io resource and map it */ dws->paddr = pci_resource_start(pdev, pci_bar); - dws->iolen = pci_resource_len(pdev, pci_bar); - ret = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev)); + ret = pcim_iomap_regions(pdev, 1, dev_name(&pdev->dev)); if (ret) - goto err_kfree; + return ret; - dws->regs = ioremap_nocache((unsigned long)dws->paddr, - pci_resource_len(pdev, pci_bar)); - if (!dws->regs) { - ret = -ENOMEM; - goto err_release_reg; - } - - dws->parent_dev = &pdev->dev; dws->bus_num = 0; dws->num_cs = 4; dws->irq = pdev->irq; @@ -83,26 +72,17 @@ static int spi_pci_probe(struct pci_dev *pdev, if (pdev->device == 0x0800) { ret = dw_spi_mid_init(dws); if (ret) - goto err_unmap; + return ret; } - ret = dw_spi_add_host(dws); + ret = dw_spi_add_host(&pdev->dev, dws); if (ret) - goto err_unmap; + return ret; /* PCI hook and SPI hook use the same drv data */ pci_set_drvdata(pdev, dwpci); - return 0; -err_unmap: - iounmap(dws->regs); -err_release_reg: - pci_release_region(pdev, pci_bar); -err_kfree: - kfree(dwpci); -err_disable: - pci_disable_device(pdev); - return ret; + return 0; } static void spi_pci_remove(struct pci_dev *pdev) diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index abf4fd5a2a25..48ec161d6eed 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -775,18 +775,16 @@ static void spi_hw_init(struct dw_spi *dws) } } -int dw_spi_add_host(struct dw_spi *dws) +int dw_spi_add_host(struct device *dev, struct dw_spi *dws) { struct spi_master *master; int ret; BUG_ON(dws == NULL); - master = spi_alloc_master(dws->parent_dev, 0); - if (!master) { - ret = -ENOMEM; - goto exit; - } + master = spi_alloc_master(dev, 0); + if (!master) + return -ENOMEM; dws->master = master; dws->type = SSI_MOTO_SPI; @@ -796,7 +794,7 @@ int dw_spi_add_host(struct dw_spi *dws) snprintf(dws->name, sizeof(dws->name), "dw_spi%d", dws->bus_num); - ret = request_irq(dws->irq, dw_spi_irq, IRQF_SHARED, + ret = devm_request_irq(dev, dws->irq, dw_spi_irq, IRQF_SHARED, dws->name, dws); if (ret < 0) { dev_err(&master->dev, "can not get IRQ\n"); @@ -835,7 +833,7 @@ int dw_spi_add_host(struct dw_spi *dws) } spi_master_set_devdata(master, dws); - ret = spi_register_master(master); + ret = devm_spi_register_master(dev, master); if (ret) { dev_err(&master->dev, "problem registering spi master\n"); goto err_queue_alloc; @@ -850,10 +848,8 @@ err_queue_alloc: dws->dma_ops->dma_exit(dws); err_diable_hw: spi_enable_chip(dws, 0); - free_irq(dws->irq, dws); err_free_master: spi_master_put(master); -exit: return ret; } EXPORT_SYMBOL_GPL(dw_spi_add_host); @@ -877,10 +873,6 @@ void dw_spi_remove_host(struct dw_spi *dws) spi_enable_chip(dws, 0); /* Disable clk */ spi_set_clk(dws, 0); - free_irq(dws->irq, dws); - - /* Disconnect from the SPI framework */ - spi_unregister_master(dws->master); } EXPORT_SYMBOL_GPL(dw_spi_remove_host); diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 5a5cd02ddb13..587643dae11e 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -92,13 +92,11 @@ struct dw_spi_dma_ops { struct dw_spi { struct spi_master *master; struct spi_device *cur_dev; - struct device *parent_dev; enum dw_ssi_type type; char name[16]; void __iomem *regs; unsigned long paddr; - u32 iolen; int irq; u32 fifo_len; /* depth of the FIFO buffer */ u32 max_freq; /* max bus freq supported */ @@ -230,7 +228,7 @@ struct dw_spi_chip { void (*cs_control)(u32 command); }; -extern int dw_spi_add_host(struct dw_spi *dws); +extern int dw_spi_add_host(struct device *dev, struct dw_spi *dws); extern void dw_spi_remove_host(struct dw_spi *dws); extern int dw_spi_suspend_host(struct dw_spi *dws); extern int dw_spi_resume_host(struct dw_spi *dws); From 020fe3fe11255cc3d8e67d5e53705c48deb19376 Mon Sep 17 00:00:00 2001 From: Baruch Siach Date: Mon, 30 Dec 2013 20:30:45 +0200 Subject: [PATCH 069/112] spi: dw-mmio: prepare the clock before enabling This is required for common clock support. Signed-off-by: Baruch Siach Signed-off-by: Mark Brown --- drivers/spi/spi-dw-mmio.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c index 569adf877b16..9af56cdf1540 100644 --- a/drivers/spi/spi-dw-mmio.c +++ b/drivers/spi/spi-dw-mmio.c @@ -62,7 +62,7 @@ static int dw_spi_mmio_probe(struct platform_device *pdev) dwsmmio->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(dwsmmio->clk)) return PTR_ERR(dwsmmio->clk); - ret = clk_enable(dwsmmio->clk); + ret = clk_prepare_enable(dwsmmio->clk); if (ret) return ret; @@ -78,7 +78,7 @@ static int dw_spi_mmio_probe(struct platform_device *pdev) return 0; out: - clk_disable(dwsmmio->clk); + clk_disable_unprepare(dwsmmio->clk); return ret; } @@ -86,7 +86,7 @@ static int dw_spi_mmio_remove(struct platform_device *pdev) { struct dw_spi_mmio *dwsmmio = platform_get_drvdata(pdev); - clk_disable(dwsmmio->clk); + clk_disable_unprepare(dwsmmio->clk); dw_spi_remove_host(&dwsmmio->dws); return 0; From 43f627ac9de42607b2cdcc7a41f2bcc82187e06a Mon Sep 17 00:00:00 2001 From: Baruch Siach Date: Mon, 30 Dec 2013 20:30:46 +0200 Subject: [PATCH 070/112] spi: dw: fix memory leak on error path Signed-off-by: Baruch Siach Signed-off-by: Mark Brown --- drivers/spi/spi-dw.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index 48ec161d6eed..bf98d63d92b3 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -619,9 +619,11 @@ static int dw_spi_setup(struct spi_device *spi) /* Only alloc on first setup */ chip = spi_get_ctldata(spi); if (!chip) { - chip = kzalloc(sizeof(struct chip_data), GFP_KERNEL); + chip = devm_kzalloc(&spi->dev, sizeof(struct chip_data), + GFP_KERNEL); if (!chip) return -ENOMEM; + spi_set_ctldata(spi, chip); } /* @@ -666,7 +668,6 @@ static int dw_spi_setup(struct spi_device *spi) | (spi->mode << SPI_MODE_OFFSET) | (chip->tmode << SPI_TMOD_OFFSET); - spi_set_ctldata(spi, chip); return 0; } From f17414c4fcf138740dbbd463171101026b6f78de Mon Sep 17 00:00:00 2001 From: Sourav Poddar Date: Fri, 20 Dec 2013 18:22:57 +0530 Subject: [PATCH 071/112] spi/qspi: Fix runtime resume path Due to the following commit commit 160a061301c7adf54c40696e7ceedc73f6b747dd Author: Wei Yongjun Date: Mon Nov 11 14:13:41 2013 +0800 spi/qspi: set correct platform drvdata in ti_qspi_probe() The ti_qspi_remove() use the platform drvdata as a type of struct ti_qspi, we should pass correct platform drvdata to platform_set_drvdata() in ti_qspi_probe(). Signed-off-by: Wei Yongjun Signed-off-by: Mark Brown platform_set_drvdata was changed in the probe, so we need to correspondingly change deferencing of qspi in runtime resume path. Else, this will lead to a NULL dereference pointer. Based on v3.13-rc3 Signed-off-by: Sourav Poddar Signed-off-by: Mark Brown --- drivers/spi/spi-ti-qspi.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index 4396bd448540..06ee18956160 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -417,10 +417,8 @@ out: 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); + qspi = dev_get_drvdata(dev); ti_qspi_restore_ctx(qspi); return 0; From 1cfd97f93e36b3f8b5d2a26147aaccae0c847a9c Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Thu, 2 Jan 2014 15:16:40 +0800 Subject: [PATCH 072/112] spi: core: Use list_first_entry_or_null() instead of open-coded Use list_first_entry_or_null() to save a few lines. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 2cd9fdc9c7f9..401cd66770f9 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -791,11 +791,8 @@ struct spi_message *spi_get_next_queued_message(struct spi_master *master) /* get a pointer to the next message, if any */ spin_lock_irqsave(&master->queue_lock, flags); - if (list_empty(&master->queue)) - next = NULL; - else - next = list_entry(master->queue.next, - struct spi_message, queue); + next = list_first_entry_or_null(&master->queue, struct spi_message, + queue); spin_unlock_irqrestore(&master->queue_lock, flags); return next; From 0abd3e37e6b2c3ea77f7d8597b3f22ad42d8defc Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Thu, 2 Jan 2014 20:19:02 +0800 Subject: [PATCH 073/112] spi: s3c64xx: Remove duplicate code to clear S3C64XX_SPI_SLAVE_SEL register Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi-s3c64xx.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 4c4b0a1219a7..b4ea9306cf35 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -927,9 +927,6 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, /* Start the signals */ writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL); - /* Start the signals */ - writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL); - spin_unlock_irqrestore(&sdd->lock, flags); status = wait_for_xfer(sdd, xfer, use_dma); From fa4934a02adaac9d5bbd2b9ac818c523bf2ea9aa Mon Sep 17 00:00:00 2001 From: Baruch Siach Date: Mon, 6 Jan 2014 09:21:33 +0200 Subject: [PATCH 074/112] spi: dw-pci: fix typo Commit 04f421e7b0b10 (spi: dw: use managed resources) introduced a typo in struct field reference. Fix it. Fixes build failure: drivers/spi/spi-dw-pci.c: In function 'spi_pci_probe': drivers/spi/spi-dw-pci.c:50:29: error: 'dev' undeclared (first use in this function) dwpci = devm_kzalloc(&pdev-dev, sizeof(struct dw_spi_pci), GFP_KERNEL); ^ Reported-by: Stephen Rothwell Signed-off-by: Baruch Siach Signed-off-by: Mark Brown --- drivers/spi/spi-dw-pci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c index 760dc0017a33..9622e5ee1263 100644 --- a/drivers/spi/spi-dw-pci.c +++ b/drivers/spi/spi-dw-pci.c @@ -47,7 +47,8 @@ static int spi_pci_probe(struct pci_dev *pdev, if (ret) return ret; - dwpci = devm_kzalloc(&pdev-dev, sizeof(struct dw_spi_pci), GFP_KERNEL); + dwpci = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_pci), + GFP_KERNEL); if (!dwpci) return -ENOMEM; From e120cc0dcf2880a4c5c0a6cb27b655600a1cfa1d Mon Sep 17 00:00:00 2001 From: Daniel Santos Date: Sun, 5 Jan 2014 17:39:26 -0600 Subject: [PATCH 075/112] spidev: fix hang when transfer_one_message fails This corrects a problem in spi_pump_messages() that leads to an spi message hanging forever when a call to transfer_one_message() fails. This failure occurs in my MCP2210 driver when the cs_change bit is set on the last transfer in a message, an operation which the hardware does not support. Rationale Since the transfer_one_message() returns an int, we must presume that it may fail. If transfer_one_message() should never fail, it should return void. Thus, calls to transfer_one_message() should properly manage a failure. Fixes: ffbbdd21329f3 (spi: create a message queueing infrastructure) Signed-off-by: Daniel Santos Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- drivers/spi/spi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 18cc625d887f..0e215237383b 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -735,7 +735,9 @@ static void spi_pump_messages(struct kthread_work *work) ret = master->transfer_one_message(master, master->cur_msg); if (ret) { dev_err(&master->dev, - "failed to transfer one message from queue\n"); + "failed to transfer one message from queue: %d\n", ret); + master->cur_msg->status = ret; + spi_finalize_current_message(master); return; } } From e3d8bee38543b1f3e6731916c4f11bea4d9f760f Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Tue, 7 Jan 2014 19:04:03 +0800 Subject: [PATCH 076/112] spi: ti-qspi: Fix getting correct address for qspi Now platform_get_drvdata() returns the address of qspi rather than master. Also drop unneeded spi_unregister_master() call in ti_qspi_remove() because we use devm_spi_register_master() in probe. commit cbcabb7a300b "spi/qspi: Fix qspi remove path" assumes platform_get_drvdata() returns address of master. However, commit 160a061301c7 "spi/qspi: set correct platform drvdata in ti_qspi_probe()" pass qspi to platform_set_drvdata(). Signed-off-by: Axel Lin Reviewed-by: Sourav Poddar Signed-off-by: Mark Brown --- drivers/spi/spi-ti-qspi.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index 06ee18956160..286cf8d6764b 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -514,13 +514,9 @@ free_master: static int ti_qspi_remove(struct platform_device *pdev) { - struct spi_master *master; - struct ti_qspi *qspi; + struct ti_qspi *qspi = platform_get_drvdata(pdev); int ret; - master = platform_get_drvdata(pdev); - qspi = spi_master_get_devdata(master); - ret = pm_runtime_get_sync(qspi->dev); if (ret < 0) { dev_err(qspi->dev, "pm_runtime_get_sync() failed\n"); @@ -532,8 +528,6 @@ static int ti_qspi_remove(struct platform_device *pdev) pm_runtime_put(qspi->dev); pm_runtime_disable(&pdev->dev); - spi_unregister_master(master); - return 0; } From 136c8bf374dd9aef0f98e5c26d1cba5b066e2443 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Tue, 7 Jan 2014 21:36:24 +0800 Subject: [PATCH 077/112] spi: dw-pci: remove free for resources allocated with devm_* It's not necessary to free resources allocated with devm_* and free them may lead to double free. Fixes: 04f421e7b0b1 ('spi: dw: use managed resources') Signed-off-by: Wei Yongjun Signed-off-by: Mark Brown --- drivers/spi/spi-dw-pci.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c index 9622e5ee1263..d4603efbd9bf 100644 --- a/drivers/spi/spi-dw-pci.c +++ b/drivers/spi/spi-dw-pci.c @@ -91,10 +91,6 @@ static void spi_pci_remove(struct pci_dev *pdev) struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); dw_spi_remove_host(&dwpci->dws); - iounmap(dwpci->dws.regs); - pci_release_region(pdev, 0); - kfree(dwpci); - pci_disable_device(pdev); } #ifdef CONFIG_PM From caedb997a400ab50da201dd415c3ef7cce016437 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Wed, 8 Jan 2014 18:52:40 +0800 Subject: [PATCH 078/112] spi: sh-hspi: Fix modalias for sh-hspi Make the modalias matches the driver name. Seems the MODULE_ALIAS is copied from drivers/spi/spi-sh-spi.c. So both spi-sh.ko and spi-sh-hspi.ko have the same alias. Fix it. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi-sh-hspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-sh-hspi.c b/drivers/spi/spi-sh-hspi.c index 292567ab4c6c..40179d201966 100644 --- a/drivers/spi/spi-sh-hspi.c +++ b/drivers/spi/spi-sh-hspi.c @@ -353,4 +353,4 @@ module_platform_driver(hspi_driver); MODULE_DESCRIPTION("SuperH HSPI bus driver"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Kuninori Morimoto "); -MODULE_ALIAS("platform:sh_spi"); +MODULE_ALIAS("platform:sh-hspi"); From d3b72c7e6bf33185a5de1db2164ff237759c554c Mon Sep 17 00:00:00 2001 From: Richard Genoud Date: Thu, 7 Nov 2013 10:34:06 +0100 Subject: [PATCH 079/112] spi: atmel: add support for changing message transfer speed The only speed available was max_speed (the maximum speed declared for a device). This patch adds the support for spi_tranfer->speed_hz parameter. We can now set a different speed for each spi message. Signed-off-by: Richard Genoud Signed-off-by: Mark Brown --- drivers/spi/spi-atmel.c | 92 ++++++++++++++++++++++++----------------- 1 file changed, 55 insertions(+), 37 deletions(-) diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index 57fa73876223..b96f9a89cdc6 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -694,6 +694,54 @@ static void atmel_spi_next_xfer_data(struct spi_master *master, *plen = len; } +static int atmel_spi_set_xfer_speed(struct atmel_spi *as, + struct spi_device *spi, + struct spi_transfer *xfer) +{ + u32 scbr, csr; + unsigned long bus_hz; + + /* v1 chips start out at half the peripheral bus speed. */ + bus_hz = clk_get_rate(as->clk); + if (!atmel_spi_is_v2(as)) + bus_hz /= 2; + + /* + * Calculate the lowest divider that satisfies the + * constraint, assuming div32/fdiv/mbz == 0. + */ + if (xfer->speed_hz) + scbr = DIV_ROUND_UP(bus_hz, xfer->speed_hz); + else + /* + * This can happend if max_speed is null. + * In this case, we set the lowest possible speed + */ + scbr = 0xff; + + /* + * If the resulting divider doesn't fit into the + * register bitfield, we can't satisfy the constraint. + */ + if (scbr >= (1 << SPI_SCBR_SIZE)) { + dev_err(&spi->dev, + "setup: %d Hz too slow, scbr %u; min %ld Hz\n", + xfer->speed_hz, scbr, bus_hz/255); + return -EINVAL; + } + if (scbr == 0) { + dev_err(&spi->dev, + "setup: %d Hz too high, scbr %u; max %ld Hz\n", + xfer->speed_hz, scbr, bus_hz); + return -EINVAL; + } + csr = spi_readl(as, CSR0 + 4 * spi->chip_select); + csr = SPI_BFINS(SCBR, scbr, csr); + spi_writel(as, CSR0 + 4 * spi->chip_select, csr); + + return 0; +} + /* * Submit next transfer for PDC. * lock is held, spi irq is blocked @@ -731,6 +779,8 @@ static void atmel_spi_pdc_next_xfer(struct spi_master *master, spi_writel(as, RCR, len); spi_writel(as, TCR, len); + atmel_spi_set_xfer_speed(as, msg->spi, xfer); + dev_dbg(&msg->spi->dev, " start xfer %p: len %u tx %p/%08llx rx %p/%08llx\n", xfer, xfer->len, xfer->tx_buf, @@ -823,6 +873,7 @@ static void atmel_spi_dma_next_xfer(struct spi_master *master, as->current_transfer = xfer; len = xfer->len; + atmel_spi_set_xfer_speed(as, msg->spi, xfer); } if (atmel_spi_use_dma(as, xfer)) { @@ -1264,9 +1315,8 @@ static int atmel_spi_setup(struct spi_device *spi) { struct atmel_spi *as; struct atmel_spi_device *asd; - u32 scbr, csr; + u32 csr; unsigned int bits = spi->bits_per_word; - unsigned long bus_hz; unsigned int npcs_pin; int ret; @@ -1290,33 +1340,7 @@ static int atmel_spi_setup(struct spi_device *spi) return -EINVAL; } - /* v1 chips start out at half the peripheral bus speed. */ - bus_hz = clk_get_rate(as->clk); - if (!atmel_spi_is_v2(as)) - bus_hz /= 2; - - if (spi->max_speed_hz) { - /* - * Calculate the lowest divider that satisfies the - * constraint, assuming div32/fdiv/mbz == 0. - */ - scbr = DIV_ROUND_UP(bus_hz, spi->max_speed_hz); - - /* - * If the resulting divider doesn't fit into the - * register bitfield, we can't satisfy the constraint. - */ - if (scbr >= (1 << SPI_SCBR_SIZE)) { - dev_dbg(&spi->dev, - "setup: %d Hz too slow, scbr %u; min %ld Hz\n", - spi->max_speed_hz, scbr, bus_hz/255); - return -EINVAL; - } - } else - /* speed zero means "as slow as possible" */ - scbr = 0xff; - - csr = SPI_BF(SCBR, scbr) | SPI_BF(BITS, bits - 8); + csr = SPI_BF(BITS, bits - 8); if (spi->mode & SPI_CPOL) csr |= SPI_BIT(CPOL); if (!(spi->mode & SPI_CPHA)) @@ -1363,8 +1387,8 @@ static int atmel_spi_setup(struct spi_device *spi) asd->csr = csr; dev_dbg(&spi->dev, - "setup: %lu Hz bpw %u mode 0x%x -> csr%d %08x\n", - bus_hz / scbr, bits, spi->mode, spi->chip_select, csr); + "setup: bpw %u mode 0x%x -> csr%d %08x\n", + bits, spi->mode, spi->chip_select, csr); if (!atmel_spi_is_v2(as)) spi_writel(as, CSR0 + 4 * spi->chip_select, csr); @@ -1414,12 +1438,6 @@ static int atmel_spi_transfer(struct spi_device *spi, struct spi_message *msg) } } - /* FIXME implement these protocol options!! */ - if (xfer->speed_hz < spi->max_speed_hz) { - dev_dbg(&spi->dev, "can't change speed in transfer\n"); - return -ENOPROTOOPT; - } - /* * DMA map early, for performance (empties dcache ASAP) and * better fault reporting. From 85a9012446d4b59a57c5942ca059144fdf8cd439 Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Tue, 31 Dec 2013 14:00:39 +0530 Subject: [PATCH 080/112] spi: s3c24xx: Remove reference to plat/fiq.h fiq.h contains only a function declaration and is not used by anyone else. Move the declaration to the driver header file and remove the unnecessary platform dependency from the driver. Signed-off-by: Sachin Kamat Signed-off-by: Mark Brown --- arch/arm/plat-samsung/include/plat/fiq.h | 13 ------------- drivers/spi/spi-s3c24xx.c | 2 -- include/linux/spi/s3c24xx.h | 2 ++ 3 files changed, 2 insertions(+), 15 deletions(-) delete mode 100644 arch/arm/plat-samsung/include/plat/fiq.h diff --git a/arch/arm/plat-samsung/include/plat/fiq.h b/arch/arm/plat-samsung/include/plat/fiq.h deleted file mode 100644 index 535d06a35628..000000000000 --- a/arch/arm/plat-samsung/include/plat/fiq.h +++ /dev/null @@ -1,13 +0,0 @@ -/* linux/arch/arm/plat-samsung/include/plat/fiq.h - * - * Copyright (c) 2009 Simtec Electronics - * Ben Dooks - * - * Header file for S3C24XX CPU FIQ support - * - * 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. -*/ - -extern int s3c24xx_set_fiq(unsigned int irq, bool on); diff --git a/drivers/spi/spi-s3c24xx.c b/drivers/spi/spi-s3c24xx.c index 2ccb28d57ba9..746424aa5353 100644 --- a/drivers/spi/spi-s3c24xx.c +++ b/drivers/spi/spi-s3c24xx.c @@ -29,7 +29,6 @@ #include -#include #include #include "spi-s3c24xx-fiq.h" @@ -84,7 +83,6 @@ struct s3c24xx_spi { struct s3c2410_spi_info *pdata; }; - #define SPCON_DEFAULT (S3C2410_SPCON_MSTR | S3C2410_SPCON_SMOD_INT) #define SPPIN_DEFAULT (S3C2410_SPPIN_KEEP) diff --git a/include/linux/spi/s3c24xx.h b/include/linux/spi/s3c24xx.h index c23b923e493b..ca271c06c591 100644 --- a/include/linux/spi/s3c24xx.h +++ b/include/linux/spi/s3c24xx.h @@ -23,4 +23,6 @@ struct s3c2410_spi_info { void (*set_cs)(struct s3c2410_spi_info *spi, int cs, int pol); }; +extern int s3c24xx_set_fiq(unsigned int irq, bool on); + #endif /* __LINUX_SPI_S3C24XX_H */ From a89e2d2754246645959f1a2f91e37e9b367bfd36 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Thu, 9 Jan 2014 16:03:58 +0800 Subject: [PATCH 081/112] spi: core: Use list_first_entry to extract head of queue For slightly better readability. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 401cd66770f9..36bfa7f820a6 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -685,7 +685,7 @@ static void spi_pump_messages(struct kthread_work *work) } /* Extract head of queue */ master->cur_msg = - list_entry(master->queue.next, struct spi_message, queue); + list_first_entry(&master->queue, struct spi_message, queue); list_del_init(&master->cur_msg->queue); if (master->busy) From b6fb8d3a1f156c50a35f88b9b55f404034493938 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Thu, 9 Jan 2014 15:23:55 +0200 Subject: [PATCH 082/112] spi: Check conflicting CS based on spi->chip_select instead of device name Commit e13ac47bec20 (spi: Use stable dev_name for ACPI enumerated SPI slaves) changed the SPI device naming to be based on ACPI device name instead of carrying bus number and chip select for devices enumerated from ACPI namespace. In case of a buggy BIOS that lists multiple SPI devices sharing the same chip select (even though they should use different) the current code fails to detect that and allows the devices to be added to the bus. Fix this by walking through the bus and comparing spi->chip_select instead of device name. This should work regardless what the device name will be in future. Signed-off-by: Mika Westerberg Acked-by: Jarkko Nikula Signed-off-by: Mark Brown --- drivers/spi/spi.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 0e215237383b..51e00c6436aa 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -370,6 +370,17 @@ static void spi_dev_set_name(struct spi_device *spi) spi->chip_select); } +static int spi_dev_check(struct device *dev, void *data) +{ + struct spi_device *spi = to_spi_device(dev); + struct spi_device *new_spi = data; + + if (spi->master == new_spi->master && + spi->chip_select == new_spi->chip_select) + return -EBUSY; + return 0; +} + /** * spi_add_device - Add spi_device allocated with spi_alloc_device * @spi: spi_device to register @@ -384,7 +395,6 @@ int spi_add_device(struct spi_device *spi) static DEFINE_MUTEX(spi_add_lock); struct spi_master *master = spi->master; struct device *dev = master->dev.parent; - struct device *d; int status; /* Chipselects are numbered 0..max; validate. */ @@ -404,12 +414,10 @@ int spi_add_device(struct spi_device *spi) */ mutex_lock(&spi_add_lock); - d = bus_find_device_by_name(&spi_bus_type, NULL, dev_name(&spi->dev)); - if (d != NULL) { + status = bus_for_each_dev(&spi_bus_type, NULL, spi, spi_dev_check); + if (status) { dev_err(dev, "chipselect %d already in use\n", spi->chip_select); - put_device(d); - status = -EBUSY; goto done; } From dd5c1f936ad472c9a7f18c82f282916a58084e20 Mon Sep 17 00:00:00 2001 From: Sekhar Nori Date: Thu, 9 Jan 2014 15:25:59 +0530 Subject: [PATCH 083/112] spi/davinci: Don't select EDMA There is no need to force selection of TI EDMA DMA engine driver when DaVinci SPI driver is selected. The driver builds just fine even with CONFIG_TI_EDMA disabled. Forcing this selection causes warnings of the sort: warning: (ARCH_KEYSTONE && SPI_DAVINCI) selects TI_EDMA which has unmet direct dependencies (DMADEVICES && (ARCH_DAVINCI || ARCH_OMAP || ARCH_KEYSTONE)) This reverts commit b5f14330590118e6a0659255476c0f24ab681e05. Reported-by: Russell King Signed-off-by: Sekhar Nori Signed-off-by: Mark Brown --- drivers/spi/Kconfig | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index eb1f1ef5fa2e..58bcff079cb8 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -159,7 +159,6 @@ config SPI_DAVINCI tristate "Texas Instruments DaVinci/DA8x/OMAP-L/AM1x SoC SPI controller" depends on ARCH_DAVINCI || ARCH_KEYSTONE select SPI_BITBANG - select TI_EDMA help SPI master controller for DaVinci/DA8x/OMAP-L/AM1x SPI modules. From e07725be735e1791cf74e9db06a8bde62e1f517d Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Wed, 8 Jan 2014 22:27:54 +0800 Subject: [PATCH 084/112] spi: fsl-dspi: Add missing breaks for switch cases Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi-fsl-dspi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 8641b03bdd7a..a37f15665a60 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -320,8 +320,10 @@ static void dspi_chipselect(struct spi_device *spi, int value) switch (value) { case BITBANG_CS_ACTIVE: pushr |= SPI_PUSHR_CONT; + break; case BITBANG_CS_INACTIVE: pushr &= ~SPI_PUSHR_CONT; + break; } writel(pushr, dspi->base + SPI_PUSHR); From 8090d6d1a415d3ae1a7208995decfab8f60f4f36 Mon Sep 17 00:00:00 2001 From: Wenyou Yang Date: Thu, 9 Jan 2014 13:19:15 +0800 Subject: [PATCH 085/112] spi: atmel: Refactor spi-atmel to use SPI framework queue Replace the deprecated master->transfer with transfer_one_message() and allow the SPI subsystem handle all the queuing of messages. Signed-off-by: Wenyou Yang Tested-by: Richard Genoud Signed-off-by: Mark Brown --- drivers/spi/spi-atmel.c | 696 +++++++++++++--------------------------- 1 file changed, 229 insertions(+), 467 deletions(-) diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index b96f9a89cdc6..b0842f751016 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -189,6 +189,8 @@ */ #define DMA_MIN_BYTES 16 +#define SPI_DMA_TIMEOUT (msecs_to_jiffies(1000)) + struct atmel_spi_dma { struct dma_chan *chan_rx; struct dma_chan *chan_tx; @@ -220,17 +222,13 @@ struct atmel_spi { int irq; struct clk *clk; struct platform_device *pdev; - struct spi_device *stay; - u8 stopping; - struct list_head queue; - struct tasklet_struct tasklet; struct spi_transfer *current_transfer; unsigned long current_remaining_bytes; - struct spi_transfer *next_transfer; - unsigned long next_remaining_bytes; int done_status; + struct completion xfer_completion; + /* scratch buffer */ void *buffer; dma_addr_t buffer_dma; @@ -241,6 +239,9 @@ struct atmel_spi { bool use_pdc; /* dmaengine data */ struct atmel_spi_dma dma; + + bool keep_cs; + bool cs_active; }; /* Controller-specific per-slave state */ @@ -376,17 +377,6 @@ static inline bool atmel_spi_use_dma(struct atmel_spi *as, return as->use_dma && xfer->len >= DMA_MIN_BYTES; } -static inline int atmel_spi_xfer_is_last(struct spi_message *msg, - struct spi_transfer *xfer) -{ - return msg->transfers.prev == &xfer->transfer_list; -} - -static inline int atmel_spi_xfer_can_be_chained(struct spi_transfer *xfer) -{ - return xfer->delay_usecs == 0 && !xfer->cs_change; -} - static int atmel_spi_dma_slave_config(struct atmel_spi *as, struct dma_slave_config *slave_config, u8 bits_per_word) @@ -513,23 +503,20 @@ static void dma_callback(void *data) struct spi_master *master = data; struct atmel_spi *as = spi_master_get_devdata(master); - /* trigger SPI tasklet */ - tasklet_schedule(&as->tasklet); + complete(&as->xfer_completion); } /* * Next transfer using PIO. - * lock is held, spi tasklet is blocked */ static void atmel_spi_next_xfer_pio(struct spi_master *master, struct spi_transfer *xfer) { struct atmel_spi *as = spi_master_get_devdata(master); + unsigned long xfer_pos = xfer->len - as->current_remaining_bytes; dev_vdbg(master->dev.parent, "atmel_spi_next_xfer_pio\n"); - as->current_remaining_bytes = xfer->len; - /* Make sure data is not remaining in RDR */ spi_readl(as, RDR); while (spi_readl(as, SR) & SPI_BIT(RDRF)) { @@ -537,13 +524,14 @@ static void atmel_spi_next_xfer_pio(struct spi_master *master, cpu_relax(); } - if (xfer->tx_buf) + if (xfer->tx_buf) { if (xfer->bits_per_word > 8) - spi_writel(as, TDR, *(u16 *)(xfer->tx_buf)); + spi_writel(as, TDR, *(u16 *)(xfer->tx_buf + xfer_pos)); else - spi_writel(as, TDR, *(u8 *)(xfer->tx_buf)); - else + spi_writel(as, TDR, *(u8 *)(xfer->tx_buf + xfer_pos)); + } else { spi_writel(as, TDR, 0); + } dev_dbg(master->dev.parent, " start pio xfer %p: len %u tx %p rx %p bitpw %d\n", @@ -556,7 +544,6 @@ static void atmel_spi_next_xfer_pio(struct spi_master *master, /* * Submit next transfer for DMA. - * lock is held, spi tasklet is blocked */ static int atmel_spi_next_xfer_dma_submit(struct spi_master *master, struct spi_transfer *xfer, @@ -747,71 +734,37 @@ static int atmel_spi_set_xfer_speed(struct atmel_spi *as, * lock is held, spi irq is blocked */ static void atmel_spi_pdc_next_xfer(struct spi_master *master, - struct spi_message *msg) + struct spi_message *msg, + struct spi_transfer *xfer) { struct atmel_spi *as = spi_master_get_devdata(master); - struct spi_transfer *xfer; - u32 len, remaining; - u32 ieval; + u32 len; dma_addr_t tx_dma, rx_dma; - if (!as->current_transfer) - xfer = list_entry(msg->transfers.next, - struct spi_transfer, transfer_list); - else if (!as->next_transfer) - xfer = list_entry(as->current_transfer->transfer_list.next, - struct spi_transfer, transfer_list); - else - xfer = NULL; + spi_writel(as, PTCR, SPI_BIT(RXTDIS) | SPI_BIT(TXTDIS)); - if (xfer) { - spi_writel(as, PTCR, SPI_BIT(RXTDIS) | SPI_BIT(TXTDIS)); + len = as->current_remaining_bytes; + atmel_spi_next_xfer_data(master, xfer, &tx_dma, &rx_dma, &len); + as->current_remaining_bytes -= len; - len = xfer->len; + spi_writel(as, RPR, rx_dma); + spi_writel(as, TPR, tx_dma); + + if (msg->spi->bits_per_word > 8) + len >>= 1; + spi_writel(as, RCR, len); + spi_writel(as, TCR, len); + + dev_dbg(&msg->spi->dev, + " 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); + + if (as->current_remaining_bytes) { + len = as->current_remaining_bytes; atmel_spi_next_xfer_data(master, xfer, &tx_dma, &rx_dma, &len); - remaining = xfer->len - len; - - spi_writel(as, RPR, rx_dma); - spi_writel(as, TPR, tx_dma); - - if (msg->spi->bits_per_word > 8) - len >>= 1; - spi_writel(as, RCR, len); - spi_writel(as, TCR, len); - - atmel_spi_set_xfer_speed(as, msg->spi, xfer); - - dev_dbg(&msg->spi->dev, - " 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; - } - - as->current_transfer = xfer; - as->current_remaining_bytes = remaining; - - if (remaining > 0) - len = remaining; - else if (!atmel_spi_xfer_is_last(msg, xfer) - && atmel_spi_xfer_can_be_chained(xfer)) { - xfer = list_entry(xfer->transfer_list.next, - struct spi_transfer, transfer_list); - len = xfer->len; - } else - xfer = NULL; - - as->next_transfer = xfer; - - if (xfer) { - u32 total; - - total = len; - atmel_spi_next_xfer_data(master, xfer, &tx_dma, &rx_dma, &len); - as->next_remaining_bytes = total - len; + as->current_remaining_bytes -= len; spi_writel(as, RNPR, rx_dma); spi_writel(as, TNPR, tx_dma); @@ -826,11 +779,6 @@ static void atmel_spi_pdc_next_xfer(struct spi_master *master, 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); - spi_writel(as, TNCR, 0); - ieval = SPI_BIT(RXBUFF) | SPI_BIT(ENDRX) | SPI_BIT(OVRES); } /* REVISIT: We're waiting for ENDRX before we start the next @@ -843,83 +791,10 @@ static void atmel_spi_pdc_next_xfer(struct spi_master *master, * * It should be doable, though. Just not now... */ - spi_writel(as, IER, ieval); + spi_writel(as, IER, SPI_BIT(ENDRX) | SPI_BIT(OVRES)); spi_writel(as, PTCR, SPI_BIT(TXTEN) | SPI_BIT(RXTEN)); } -/* - * Choose way to submit next transfer and start it. - * lock is held, spi tasklet is blocked - */ -static void atmel_spi_dma_next_xfer(struct spi_master *master, - struct spi_message *msg) -{ - struct atmel_spi *as = spi_master_get_devdata(master); - struct spi_transfer *xfer; - u32 remaining, len; - - remaining = as->current_remaining_bytes; - if (remaining) { - xfer = as->current_transfer; - len = remaining; - } else { - if (!as->current_transfer) - xfer = list_entry(msg->transfers.next, - struct spi_transfer, transfer_list); - else - xfer = list_entry( - as->current_transfer->transfer_list.next, - struct spi_transfer, transfer_list); - - as->current_transfer = xfer; - len = xfer->len; - atmel_spi_set_xfer_speed(as, msg->spi, xfer); - } - - if (atmel_spi_use_dma(as, xfer)) { - u32 total = len; - if (!atmel_spi_next_xfer_dma_submit(master, xfer, &len)) { - as->current_remaining_bytes = total - len; - return; - } else { - dev_err(&msg->spi->dev, "unable to use DMA, fallback to PIO\n"); - } - } - - /* use PIO if error appened using DMA */ - atmel_spi_next_xfer_pio(master, xfer); -} - -static void atmel_spi_next_message(struct spi_master *master) -{ - struct atmel_spi *as = spi_master_get_devdata(master); - struct spi_message *msg; - struct spi_device *spi; - - BUG_ON(as->current_transfer); - - msg = list_entry(as->queue.next, struct spi_message, queue); - spi = msg->spi; - - dev_dbg(master->dev.parent, "start message %p for %s\n", - msg, dev_name(&spi->dev)); - - /* select chip if it's not still active */ - if (as->stay) { - if (as->stay != spi) { - cs_deactivate(as, as->stay); - cs_activate(as, spi); - } - as->stay = NULL; - } else - cs_activate(as, spi); - - if (as->use_pdc) - atmel_spi_pdc_next_xfer(master, msg); - else - atmel_spi_dma_next_xfer(master, msg); -} - /* * For DMA, tx_buf/tx_dma have the same relationship as rx_buf/rx_dma: * - The buffer is either valid for CPU access, else NULL @@ -975,41 +850,7 @@ static void atmel_spi_disable_pdc_transfer(struct atmel_spi *as) spi_writel(as, PTCR, SPI_BIT(RXTDIS) | SPI_BIT(TXTDIS)); } -static void -atmel_spi_msg_done(struct spi_master *master, struct atmel_spi *as, - struct spi_message *msg, int stay) -{ - if (!stay || as->done_status < 0) - cs_deactivate(as, msg->spi); - else - as->stay = msg->spi; - - list_del(&msg->queue); - msg->status = as->done_status; - - dev_dbg(master->dev.parent, - "xfer complete: %u bytes transferred\n", - msg->actual_length); - - atmel_spi_unlock(as); - msg->complete(msg->context); - atmel_spi_lock(as); - - as->current_transfer = NULL; - as->next_transfer = NULL; - as->done_status = 0; - - /* continue if needed */ - if (list_empty(&as->queue) || as->stopping) { - if (as->use_pdc) - atmel_spi_disable_pdc_transfer(as); - } else { - atmel_spi_next_message(master); - } -} - /* Called from IRQ - * lock is held * * Must update "current_remaining_bytes" to keep track of data * to transfer. @@ -1017,9 +858,7 @@ atmel_spi_msg_done(struct spi_master *master, struct atmel_spi *as, static void atmel_spi_pump_pio_data(struct atmel_spi *as, struct spi_transfer *xfer) { - u8 *txp; u8 *rxp; - u16 *txp16; u16 *rxp16; unsigned long xfer_pos = xfer->len - as->current_remaining_bytes; @@ -1041,96 +880,12 @@ atmel_spi_pump_pio_data(struct atmel_spi *as, struct spi_transfer *xfer) } else { as->current_remaining_bytes--; } - - if (as->current_remaining_bytes) { - if (xfer->tx_buf) { - if (xfer->bits_per_word > 8) { - txp16 = (u16 *)(((u8 *)xfer->tx_buf) - + xfer_pos + 2); - spi_writel(as, TDR, *txp16); - } else { - txp = ((u8 *)xfer->tx_buf) + xfer_pos + 1; - spi_writel(as, TDR, *txp); - } - } else { - spi_writel(as, TDR, 0); - } - } -} - -/* Tasklet - * Called from DMA callback + pio transfer and overrun IRQ. - */ -static void atmel_spi_tasklet_func(unsigned long data) -{ - struct spi_master *master = (struct spi_master *)data; - struct atmel_spi *as = spi_master_get_devdata(master); - struct spi_message *msg; - struct spi_transfer *xfer; - - dev_vdbg(master->dev.parent, "atmel_spi_tasklet_func\n"); - - atmel_spi_lock(as); - - xfer = as->current_transfer; - - if (xfer == NULL) - /* already been there */ - goto tasklet_out; - - msg = list_entry(as->queue.next, struct spi_message, queue); - - if (as->current_remaining_bytes == 0) { - if (as->done_status < 0) { - /* error happened (overrun) */ - if (atmel_spi_use_dma(as, xfer)) - atmel_spi_stop_dma(as); - } else { - /* only update length if no error */ - msg->actual_length += xfer->len; - } - - if (atmel_spi_use_dma(as, xfer)) - if (!msg->is_dma_mapped) - atmel_spi_dma_unmap_xfer(master, xfer); - - if (xfer->delay_usecs) - udelay(xfer->delay_usecs); - - if (atmel_spi_xfer_is_last(msg, xfer) || as->done_status < 0) { - /* report completed (or erroneous) message */ - atmel_spi_msg_done(master, as, msg, xfer->cs_change); - } else { - if (xfer->cs_change) { - cs_deactivate(as, msg->spi); - udelay(1); - cs_activate(as, msg->spi); - } - - /* - * Not done yet. Submit the next transfer. - * - * FIXME handle protocol options for xfer - */ - atmel_spi_dma_next_xfer(master, msg); - } - } else { - /* - * Keep going, we still have data to send in - * the current transfer. - */ - atmel_spi_dma_next_xfer(master, msg); - } - -tasklet_out: - atmel_spi_unlock(as); } /* Interrupt * * No need for locking in this Interrupt handler: done_status is the - * only information modified. What we need is the update of this field - * before tasklet runs. This is ensured by using barrier. + * only information modified. */ static irqreturn_t atmel_spi_pio_interrupt(int irq, void *dev_id) @@ -1158,8 +913,6 @@ atmel_spi_pio_interrupt(int irq, void *dev_id) * * We will also not process any remaning transfers in * the message. - * - * All actions are done in tasklet with done_status indication */ as->done_status = -EIO; smp_wmb(); @@ -1167,7 +920,7 @@ atmel_spi_pio_interrupt(int irq, void *dev_id) /* Clear any overrun happening while cleaning up */ spi_readl(as, SR); - tasklet_schedule(&as->tasklet); + complete(&as->xfer_completion); } else if (pending & SPI_BIT(RDRF)) { atmel_spi_lock(as); @@ -1176,11 +929,10 @@ atmel_spi_pio_interrupt(int irq, void *dev_id) ret = IRQ_HANDLED; xfer = as->current_transfer; atmel_spi_pump_pio_data(as, xfer); - if (!as->current_remaining_bytes) { - /* no more data to xfer, kick tasklet */ + if (!as->current_remaining_bytes) spi_writel(as, IDR, pending); - tasklet_schedule(&as->tasklet); - } + + complete(&as->xfer_completion); } atmel_spi_unlock(as); @@ -1198,116 +950,35 @@ atmel_spi_pdc_interrupt(int irq, void *dev_id) { struct spi_master *master = dev_id; struct atmel_spi *as = spi_master_get_devdata(master); - struct spi_message *msg; - struct spi_transfer *xfer; u32 status, pending, imr; int ret = IRQ_NONE; - atmel_spi_lock(as); - - xfer = as->current_transfer; - msg = list_entry(as->queue.next, struct spi_message, queue); - imr = spi_readl(as, IMR); status = spi_readl(as, SR); pending = status & imr; if (pending & SPI_BIT(OVRES)) { - int timeout; ret = IRQ_HANDLED; spi_writel(as, IDR, (SPI_BIT(RXBUFF) | SPI_BIT(ENDRX) | SPI_BIT(OVRES))); - /* - * When we get an overrun, we disregard the current - * transfer. Data will not be copied back from any - * bounce buffer and msg->actual_len will not be - * updated with the last xfer. - * - * We will also not process any remaning transfers in - * the message. - * - * First, stop the transfer and unmap the DMA buffers. - */ - spi_writel(as, PTCR, SPI_BIT(RXTDIS) | SPI_BIT(TXTDIS)); - if (!msg->is_dma_mapped) - atmel_spi_dma_unmap_xfer(master, xfer); - - /* REVISIT: udelay in irq is unfriendly */ - if (xfer->delay_usecs) - udelay(xfer->delay_usecs); - - dev_warn(master->dev.parent, "overrun (%u/%u remaining)\n", - spi_readl(as, TCR), spi_readl(as, RCR)); - - /* - * Clean up DMA registers and make sure the data - * registers are empty. - */ - spi_writel(as, RNCR, 0); - spi_writel(as, TNCR, 0); - spi_writel(as, RCR, 0); - spi_writel(as, TCR, 0); - for (timeout = 1000; timeout; timeout--) - if (spi_readl(as, SR) & SPI_BIT(TXEMPTY)) - break; - if (!timeout) - dev_warn(master->dev.parent, - "timeout waiting for TXEMPTY"); - while (spi_readl(as, SR) & SPI_BIT(RDRF)) - spi_readl(as, RDR); - /* Clear any overrun happening while cleaning up */ spi_readl(as, SR); as->done_status = -EIO; - atmel_spi_msg_done(master, as, msg, 0); + + complete(&as->xfer_completion); + } else if (pending & (SPI_BIT(RXBUFF) | SPI_BIT(ENDRX))) { ret = IRQ_HANDLED; spi_writel(as, IDR, pending); - if (as->current_remaining_bytes == 0) { - msg->actual_length += xfer->len; - - if (!msg->is_dma_mapped) - atmel_spi_dma_unmap_xfer(master, xfer); - - /* REVISIT: udelay in irq is unfriendly */ - if (xfer->delay_usecs) - udelay(xfer->delay_usecs); - - if (atmel_spi_xfer_is_last(msg, xfer)) { - /* report completed message */ - atmel_spi_msg_done(master, as, msg, - xfer->cs_change); - } else { - if (xfer->cs_change) { - cs_deactivate(as, msg->spi); - udelay(1); - cs_activate(as, msg->spi); - } - - /* - * Not done yet. Submit the next transfer. - * - * FIXME handle protocol options for xfer - */ - atmel_spi_pdc_next_xfer(master, msg); - } - } else { - /* - * Keep going, we still have data to send in - * the current transfer. - */ - atmel_spi_pdc_next_xfer(master, msg); - } + complete(&as->xfer_completion); } - atmel_spi_unlock(as); - return ret; } @@ -1322,9 +993,6 @@ static int atmel_spi_setup(struct spi_device *spi) as = spi_master_get_devdata(spi->master); - if (as->stopping) - return -ESHUTDOWN; - if (spi->chip_select > spi->master->num_chipselect) { dev_dbg(&spi->dev, "setup: invalid chipselect %u (%u defined)\n", @@ -1376,12 +1044,6 @@ static int atmel_spi_setup(struct spi_device *spi) asd->npcs_pin = npcs_pin; spi->controller_state = asd; gpio_direction_output(npcs_pin, !(spi->mode & SPI_CS_HIGH)); - } else { - atmel_spi_lock(as); - if (as->stay == spi) - as->stay = NULL; - cs_deactivate(as, spi); - atmel_spi_unlock(as); } asd->csr = csr; @@ -1396,97 +1058,218 @@ static int atmel_spi_setup(struct spi_device *spi) return 0; } -static int atmel_spi_transfer(struct spi_device *spi, struct spi_message *msg) +static int atmel_spi_one_transfer(struct spi_master *master, + struct spi_message *msg, + struct spi_transfer *xfer) { struct atmel_spi *as; - struct spi_transfer *xfer; - struct device *controller = spi->master->dev.parent; + struct spi_device *spi = msg->spi; u8 bits; + u32 len; struct atmel_spi_device *asd; + int timeout; + int ret; - as = spi_master_get_devdata(spi->master); + as = spi_master_get_devdata(master); - dev_dbg(controller, "new message %p submitted for %s\n", - msg, dev_name(&spi->dev)); + if (!(xfer->tx_buf || xfer->rx_buf) && xfer->len) { + dev_dbg(&spi->dev, "missing rx or tx buf\n"); + return -EINVAL; + } + + if (xfer->bits_per_word) { + asd = spi->controller_state; + bits = (asd->csr >> 4) & 0xf; + if (bits != xfer->bits_per_word - 8) { + dev_dbg(&spi->dev, + "you can't yet change bits_per_word in transfers\n"); + return -ENOPROTOOPT; + } + } + + if (xfer->bits_per_word > 8) { + if (xfer->len % 2) { + dev_dbg(&spi->dev, + "buffer len should be 16 bits aligned\n"); + return -EINVAL; + } + } + + /* + * DMA map early, for performance (empties dcache ASAP) and + * better fault reporting. + */ + if ((!msg->is_dma_mapped) + && (atmel_spi_use_dma(as, xfer) || as->use_pdc)) { + if (atmel_spi_dma_map_xfer(as, xfer) < 0) + return -ENOMEM; + } + + atmel_spi_set_xfer_speed(as, msg->spi, xfer); + + as->done_status = 0; + as->current_transfer = xfer; + as->current_remaining_bytes = xfer->len; + while (as->current_remaining_bytes) { + reinit_completion(&as->xfer_completion); + + if (as->use_pdc) { + atmel_spi_pdc_next_xfer(master, msg, xfer); + } else if (atmel_spi_use_dma(as, xfer)) { + len = as->current_remaining_bytes; + ret = atmel_spi_next_xfer_dma_submit(master, + xfer, &len); + if (ret) { + dev_err(&spi->dev, + "unable to use DMA, fallback to PIO\n"); + atmel_spi_next_xfer_pio(master, xfer); + } else { + as->current_remaining_bytes -= len; + } + } else { + atmel_spi_next_xfer_pio(master, xfer); + } + + ret = wait_for_completion_timeout(&as->xfer_completion, + SPI_DMA_TIMEOUT); + if (WARN_ON(ret == 0)) { + dev_err(&spi->dev, + "spi trasfer timeout, err %d\n", ret); + as->done_status = -EIO; + } else { + ret = 0; + } + + if (as->done_status) + break; + } + + if (as->done_status) { + if (as->use_pdc) { + dev_warn(master->dev.parent, + "overrun (%u/%u remaining)\n", + spi_readl(as, TCR), spi_readl(as, RCR)); + + /* + * Clean up DMA registers and make sure the data + * registers are empty. + */ + spi_writel(as, RNCR, 0); + spi_writel(as, TNCR, 0); + spi_writel(as, RCR, 0); + spi_writel(as, TCR, 0); + for (timeout = 1000; timeout; timeout--) + if (spi_readl(as, SR) & SPI_BIT(TXEMPTY)) + break; + if (!timeout) + dev_warn(master->dev.parent, + "timeout waiting for TXEMPTY"); + while (spi_readl(as, SR) & SPI_BIT(RDRF)) + spi_readl(as, RDR); + + /* Clear any overrun happening while cleaning up */ + spi_readl(as, SR); + + } else if (atmel_spi_use_dma(as, xfer)) { + atmel_spi_stop_dma(as); + } + + if (!msg->is_dma_mapped + && (atmel_spi_use_dma(as, xfer) || as->use_pdc)) + atmel_spi_dma_unmap_xfer(master, xfer); + + return 0; + + } else { + /* only update length if no error */ + msg->actual_length += xfer->len; + } + + if (!msg->is_dma_mapped + && (atmel_spi_use_dma(as, xfer) || as->use_pdc)) + atmel_spi_dma_unmap_xfer(master, xfer); + + if (xfer->delay_usecs) + udelay(xfer->delay_usecs); + + if (xfer->cs_change) { + if (list_is_last(&xfer->transfer_list, + &msg->transfers)) { + as->keep_cs = true; + } else { + as->cs_active = !as->cs_active; + if (as->cs_active) + cs_activate(as, msg->spi); + else + cs_deactivate(as, msg->spi); + } + } + + return 0; +} + +static int atmel_spi_transfer_one_message(struct spi_master *master, + struct spi_message *msg) +{ + struct atmel_spi *as; + struct spi_transfer *xfer; + struct spi_device *spi = msg->spi; + int ret = 0; + + as = spi_master_get_devdata(master); + + dev_dbg(&spi->dev, "new message %p submitted for %s\n", + msg, dev_name(&spi->dev)); if (unlikely(list_empty(&msg->transfers))) return -EINVAL; - if (as->stopping) - return -ESHUTDOWN; + atmel_spi_lock(as); + cs_activate(as, spi); + + as->cs_active = true; + as->keep_cs = false; + + msg->status = 0; + msg->actual_length = 0; list_for_each_entry(xfer, &msg->transfers, transfer_list) { - if (!(xfer->tx_buf || xfer->rx_buf) && xfer->len) { - dev_dbg(&spi->dev, "missing rx or tx buf\n"); - return -EINVAL; - } - - if (xfer->bits_per_word) { - asd = spi->controller_state; - bits = (asd->csr >> 4) & 0xf; - if (bits != xfer->bits_per_word - 8) { - dev_dbg(&spi->dev, - "you can't yet change bits_per_word in transfers\n"); - return -ENOPROTOOPT; - } - } - - if (xfer->bits_per_word > 8) { - if (xfer->len % 2) { - dev_dbg(&spi->dev, "buffer len should be 16 bits aligned\n"); - return -EINVAL; - } - } - - /* - * DMA map early, for performance (empties dcache ASAP) and - * better fault reporting. - */ - if ((!msg->is_dma_mapped) && (atmel_spi_use_dma(as, xfer) - || as->use_pdc)) { - if (atmel_spi_dma_map_xfer(as, xfer) < 0) - return -ENOMEM; - } + ret = atmel_spi_one_transfer(master, msg, xfer); + if (ret) + goto msg_done; } -#ifdef VERBOSE + if (as->use_pdc) + atmel_spi_disable_pdc_transfer(as); + list_for_each_entry(xfer, &msg->transfers, transfer_list) { - dev_dbg(controller, + dev_dbg(&spi->dev, " 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); } -#endif - msg->status = -EINPROGRESS; - msg->actual_length = 0; +msg_done: + if (!as->keep_cs) + cs_deactivate(as, msg->spi); - atmel_spi_lock(as); - list_add_tail(&msg->queue, &as->queue); - if (!as->current_transfer) - atmel_spi_next_message(spi->master); atmel_spi_unlock(as); - return 0; + msg->status = as->done_status; + spi_finalize_current_message(spi->master); + + return ret; } static void atmel_spi_cleanup(struct spi_device *spi) { - struct atmel_spi *as = spi_master_get_devdata(spi->master); struct atmel_spi_device *asd = spi->controller_state; unsigned gpio = (unsigned) spi->controller_data; if (!asd) return; - atmel_spi_lock(as); - if (as->stay == spi) { - as->stay = NULL; - cs_deactivate(as, spi); - } - atmel_spi_unlock(as); - spi->controller_state = NULL; gpio_free(gpio); kfree(asd); @@ -1545,7 +1328,7 @@ static int atmel_spi_probe(struct platform_device *pdev) master->bus_num = pdev->id; master->num_chipselect = master->dev.of_node ? 0 : 4; master->setup = atmel_spi_setup; - master->transfer = atmel_spi_transfer; + master->transfer_one_message = atmel_spi_transfer_one_message; master->cleanup = atmel_spi_cleanup; platform_set_drvdata(pdev, master); @@ -1561,7 +1344,6 @@ static int atmel_spi_probe(struct platform_device *pdev) goto out_free; spin_lock_init(&as->lock); - INIT_LIST_HEAD(&as->queue); as->pdev = pdev; as->regs = devm_ioremap_resource(&pdev->dev, regs); @@ -1573,6 +1355,8 @@ static int atmel_spi_probe(struct platform_device *pdev) as->irq = irq; as->clk = clk; + init_completion(&as->xfer_completion); + atmel_get_caps(as); as->use_dma = false; @@ -1591,9 +1375,6 @@ static int atmel_spi_probe(struct platform_device *pdev) ret = devm_request_irq(&pdev->dev, irq, atmel_spi_pdc_interrupt, 0, dev_name(&pdev->dev), master); } else { - tasklet_init(&as->tasklet, atmel_spi_tasklet_func, - (unsigned long)master); - ret = devm_request_irq(&pdev->dev, irq, atmel_spi_pio_interrupt, 0, dev_name(&pdev->dev), master); } @@ -1637,8 +1418,6 @@ out_free_dma: out_free_irq: out_unmap_regs: out_free_buffer: - if (!as->use_pdc) - tasklet_kill(&as->tasklet); dma_free_coherent(&pdev->dev, BUFFER_SIZE, as->buffer, as->buffer_dma); out_free: @@ -1650,12 +1429,9 @@ static int atmel_spi_remove(struct platform_device *pdev) { struct spi_master *master = platform_get_drvdata(pdev); struct atmel_spi *as = spi_master_get_devdata(master); - struct spi_message *msg; - struct spi_transfer *xfer; /* reset the hardware and block queue progress */ spin_lock_irq(&as->lock); - as->stopping = 1; if (as->use_dma) { atmel_spi_stop_dma(as); atmel_spi_release_dma(as); @@ -1666,20 +1442,6 @@ static int atmel_spi_remove(struct platform_device *pdev) spi_readl(as, SR); spin_unlock_irq(&as->lock); - /* Terminate remaining queued transfers */ - list_for_each_entry(msg, &as->queue, queue) { - list_for_each_entry(xfer, &msg->transfers, transfer_list) { - if (!msg->is_dma_mapped - && (atmel_spi_use_dma(as, xfer) - || as->use_pdc)) - atmel_spi_dma_unmap_xfer(master, xfer); - } - msg->status = -ESHUTDOWN; - msg->complete(msg->context); - } - - if (!as->use_pdc) - tasklet_kill(&as->tasklet); dma_free_coherent(&pdev->dev, BUFFER_SIZE, as->buffer, as->buffer_dma); From e826a7ff69b285ea295144303653c01f781ea9dc Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Wed, 8 Jan 2014 16:00:04 +0800 Subject: [PATCH 086/112] spi: oc-tiny: Simplify tiny_spi_txrx_bufs implementation when irq is not used Currently we have similar code for (txp && rxp), (txp && !rxp), (!rxp & txp), and (!txp && !rxp) cases. This patch refactors the code a bit to avoid duplicate similar code. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi-oc-tiny.c | 62 +++++++-------------------------------- 1 file changed, 11 insertions(+), 51 deletions(-) diff --git a/drivers/spi/spi-oc-tiny.c b/drivers/spi/spi-oc-tiny.c index 91c668596202..f7c896e2981e 100644 --- a/drivers/spi/spi-oc-tiny.c +++ b/drivers/spi/spi-oc-tiny.c @@ -153,62 +153,22 @@ static int tiny_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) } wait_for_completion(&hw->done); - } else if (txp && rxp) { - /* we need to tighten the transfer loop */ - writeb(*txp++, hw->base + TINY_SPI_TXDATA); - if (t->len > 1) { - writeb(*txp++, hw->base + TINY_SPI_TXDATA); - for (i = 2; i < t->len; i++) { - u8 rx, tx = *txp++; - tiny_spi_wait_txr(hw); - rx = readb(hw->base + TINY_SPI_TXDATA); - writeb(tx, hw->base + TINY_SPI_TXDATA); - *rxp++ = rx; - } - tiny_spi_wait_txr(hw); - *rxp++ = readb(hw->base + TINY_SPI_TXDATA); - } - tiny_spi_wait_txe(hw); - *rxp++ = readb(hw->base + TINY_SPI_RXDATA); - } else if (rxp) { - writeb(0, hw->base + TINY_SPI_TXDATA); - if (t->len > 1) { - writeb(0, - hw->base + TINY_SPI_TXDATA); - for (i = 2; i < t->len; i++) { - u8 rx; - tiny_spi_wait_txr(hw); - rx = readb(hw->base + TINY_SPI_TXDATA); - writeb(0, hw->base + TINY_SPI_TXDATA); - *rxp++ = rx; - } - tiny_spi_wait_txr(hw); - *rxp++ = readb(hw->base + TINY_SPI_TXDATA); - } - tiny_spi_wait_txe(hw); - *rxp++ = readb(hw->base + TINY_SPI_RXDATA); - } else if (txp) { - writeb(*txp++, hw->base + TINY_SPI_TXDATA); - if (t->len > 1) { - writeb(*txp++, hw->base + TINY_SPI_TXDATA); - for (i = 2; i < t->len; i++) { - u8 tx = *txp++; - tiny_spi_wait_txr(hw); - writeb(tx, hw->base + TINY_SPI_TXDATA); - } - } - tiny_spi_wait_txe(hw); } else { - writeb(0, hw->base + TINY_SPI_TXDATA); - if (t->len > 1) { - writeb(0, hw->base + TINY_SPI_TXDATA); - for (i = 2; i < t->len; i++) { + /* we need to tighten the transfer loop */ + writeb(txp ? *txp++ : 0, hw->base + TINY_SPI_TXDATA); + for (i = 1; i < t->len; i++) { + writeb(txp ? *txp++ : 0, hw->base + TINY_SPI_TXDATA); + + if (rxp || (i != t->len - 1)) tiny_spi_wait_txr(hw); - writeb(0, hw->base + TINY_SPI_TXDATA); - } + if (rxp) + *rxp++ = readb(hw->base + TINY_SPI_TXDATA); } tiny_spi_wait_txe(hw); + if (rxp) + *rxp++ = readb(hw->base + TINY_SPI_RXDATA); } + return t->len; } From 989847967cd762598ff0caa2aafc4ddcb04bcda3 Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Fri, 10 Jan 2014 17:02:05 +0400 Subject: [PATCH 087/112] spi: clps711x: Use devm_gpio_request() This patch replaces gpio_request() with devm_ API. As a result this simplifies error path and eliminates "remove" function. Signed-off-by: Alexander Shiyan Signed-off-by: Mark Brown --- drivers/spi/spi-clps711x.c | 22 ++-------------------- 1 file changed, 2 insertions(+), 20 deletions(-) diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c index 6f03d7e6435d..dafb243a9143 100644 --- a/drivers/spi/spi-clps711x.c +++ b/drivers/spi/spi-clps711x.c @@ -1,7 +1,7 @@ /* * CLPS711X SPI bus driver * - * Copyright (C) 2012 Alexander Shiyan + * Copyright (C) 2012-2014 Alexander Shiyan * * 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 @@ -198,7 +198,7 @@ static int spi_clps711x_probe(struct platform_device *pdev) ret = -EINVAL; goto err_out; } - if (gpio_request(hw->chipselect[i], DRIVER_NAME)) { + if (devm_gpio_request(&pdev->dev, hw->chipselect[i], NULL)) { dev_err(&pdev->dev, "Can't get CS GPIO %i\n", i); ret = -EINVAL; goto err_out; @@ -240,35 +240,17 @@ static int spi_clps711x_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Failed to register master\n"); err_out: - while (--i >= 0) - if (gpio_is_valid(hw->chipselect[i])) - gpio_free(hw->chipselect[i]); - spi_master_put(master); return ret; } -static int spi_clps711x_remove(struct platform_device *pdev) -{ - int i; - struct spi_master *master = platform_get_drvdata(pdev); - struct spi_clps711x_data *hw = spi_master_get_devdata(master); - - for (i = 0; i < master->num_chipselect; i++) - if (gpio_is_valid(hw->chipselect[i])) - gpio_free(hw->chipselect[i]); - - return 0; -} - static struct platform_driver clps711x_spi_driver = { .driver = { .name = DRIVER_NAME, .owner = THIS_MODULE, }, .probe = spi_clps711x_probe, - .remove = spi_clps711x_remove, }; module_platform_driver(clps711x_spi_driver); From 646d79b2d7bdf99b4776f0d2d818559de710ea28 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sun, 12 Jan 2014 14:38:14 +0800 Subject: [PATCH 088/112] spi: altera: Remove unneeded NULL checking for hw->bitbang.master We already has NULL test for master after calling spi_alloc_master(). Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi-altera.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/spi/spi-altera.c b/drivers/spi/spi-altera.c index 595b62cb545d..5d7deaf62867 100644 --- a/drivers/spi/spi-altera.c +++ b/drivers/spi/spi-altera.c @@ -220,8 +220,6 @@ static int altera_spi_probe(struct platform_device *pdev) /* setup the state for the bitbang driver */ hw->bitbang.master = master; - if (!hw->bitbang.master) - return err; hw->bitbang.chipselect = altera_spi_chipsel; hw->bitbang.txrx_bufs = altera_spi_txrx; From d3fbd457013c0f6d96de461ce0a9cb1f8b73cd0b Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 10 Jan 2014 17:09:53 +0000 Subject: [PATCH 089/112] spi: Use bitfields for multiple data lines Trent Piepho observed that since the current realistic maximum number of data lines is four we can pack the spi_transfer struct more efficiently if we use a bitfield for the number of bits, allowing the fields to fit in a single byte along with cs_change. If space becomes an issue further optimiation is possible by only using the constants and packing the values chosen for them. Reported-by: Trent Piepho Signed-off-by: Mark Brown --- include/linux/spi/spi.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 27a882978c15..77b529e418d5 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -576,8 +576,8 @@ struct spi_transfer { dma_addr_t rx_dma; unsigned cs_change:1; - u8 tx_nbits; - u8 rx_nbits; + unsigned tx_nbits:3; + unsigned rx_nbits:3; #define SPI_NBITS_SINGLE 0x01 /* 1bit transfer */ #define SPI_NBITS_DUAL 0x02 /* 2bits transfer */ #define SPI_NBITS_QUAD 0x04 /* 4bits transfer */ From 3ab546205411a245ef0f60ec708467a072855c6f Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sun, 12 Jan 2014 14:40:22 +0800 Subject: [PATCH 090/112] spi: ti-qspi: Simplify qspi_write_msg and qspi_read_msg implementation Make the unit of wlen to be byte, and simplify the code to avoid duplicate code for different wlen cases. Signed-off-by: Axel Lin Acked-by: Sourav Poddar Signed-off-by: Mark Brown --- drivers/spi/spi-ti-qspi.c | 61 +++++++++++++-------------------------- 1 file changed, 20 insertions(+), 41 deletions(-) diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index 1211b663c814..a850b403b51b 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -208,53 +208,36 @@ static int qspi_write_msg(struct ti_qspi *qspi, struct spi_transfer *t) txbuf = t->tx_buf; cmd = qspi->cmd | QSPI_WR_SNGL; count = t->len; - wlen = t->bits_per_word; + wlen = t->bits_per_word >> 3; /* in bytes */ while (count) { switch (wlen) { - case 8: + case 1: 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: + case 2: 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: + case 4: 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; } + + 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 += wlen; + count -= wlen; } return 0; @@ -280,7 +263,7 @@ static int qspi_read_msg(struct ti_qspi *qspi, struct spi_transfer *t) break; } count = t->len; - wlen = t->bits_per_word; + wlen = t->bits_per_word >> 3; /* in bytes */ while (count) { dev_dbg(qspi->dev, "rx cmd %08x dc %08x\n", cmd, qspi->dc); @@ -292,22 +275,18 @@ static int qspi_read_msg(struct ti_qspi *qspi, struct spi_transfer *t) return -ETIMEDOUT; } switch (wlen) { - case 8: + case 1: *rxbuf = readb(qspi->base + QSPI_SPI_DATA_REG); - rxbuf += 1; - count -= 1; break; - case 16: + case 2: *((u16 *)rxbuf) = readw(qspi->base + QSPI_SPI_DATA_REG); - rxbuf += 2; - count -= 2; break; - case 32: + case 4: *((u32 *)rxbuf) = readl(qspi->base + QSPI_SPI_DATA_REG); - rxbuf += 4; - count -= 4; break; } + rxbuf += wlen; + count -= wlen; } return 0; From 5a33d30ff1b8fdfb5bd8f4fa46dd473bf768aeff Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sun, 12 Jan 2014 15:02:32 +0800 Subject: [PATCH 091/112] spi: ti-qspi: Fixup driver name The driver name in current code looks like a compatible string which is not the naming convention for platform drivers. Fix it and also add modalias since this driver can be built as a module. Signed-off-by: Axel Lin Acked-by: Sourav Poddar Signed-off-by: Mark Brown --- drivers/spi/spi-ti-qspi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index a850b403b51b..251e43f72dbb 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -560,7 +560,7 @@ static struct platform_driver ti_qspi_driver = { .probe = ti_qspi_probe, .remove = ti_qspi_remove, .driver = { - .name = "ti,dra7xxx-qspi", + .name = "ti-qspi", .owner = THIS_MODULE, .pm = &ti_qspi_pm_ops, .of_match_table = ti_qspi_match, @@ -572,3 +572,4 @@ module_platform_driver(ti_qspi_driver); MODULE_AUTHOR("Sourav Poddar "); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("TI QSPI controller driver"); +MODULE_ALIAS("platform:ti-qspi"); From 269ccca8ec1a3991e07eaf5f90326134bd17781a Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 12 Jan 2014 13:59:06 +0100 Subject: [PATCH 092/112] spi: Kill superfluous cast in spi_w8r16() spi_write_then_read() takes a "void *" for rxbuf, so there's no need to cast the buffer pointer to "u8 *". Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- include/linux/spi/spi.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 77b529e418d5..21a7251d85ee 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -847,7 +847,7 @@ static inline ssize_t spi_w8r16(struct spi_device *spi, u8 cmd) ssize_t status; u16 result; - status = spi_write_then_read(spi, &cmd, 1, (u8 *) &result, 2); + status = spi_write_then_read(spi, &cmd, 1, &result, 2); /* return negative errno or unsigned value */ return (status < 0) ? status : result; From 1afd9989a6a2561183be82e420d4d2f3889b7ee7 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 12 Jan 2014 14:00:29 +0100 Subject: [PATCH 093/112] spi: core: Improve tx/rx_nbits check comments - Rephrase the comments about tx/rx_nbits validity checks, - Remove the stale comment about SPI_3WIRE (the code it refers to was removed in commit 368ca4e0c75612c0a4d6bbcef7efb944604340c2 ("spi: Eliminate 3WIRE spi_transfer check")). Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 36bfa7f820a6..9f26797e4319 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1660,9 +1660,8 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) 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 + * 1. check the value matches one of single, dual and quad + * 2. check tx/rx_nbits match the mode in spi_device */ if (xfer->tx_buf) { if (xfer->tx_nbits != SPI_NBITS_SINGLE && From c6c07b4f6d697cab021ca07de21c4c0da2ac47b1 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 12 Jan 2014 14:03:38 +0100 Subject: [PATCH 094/112] spi: sh-hspi: Spelling s/recive/receive/ Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi-sh-hspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-sh-hspi.c b/drivers/spi/spi-sh-hspi.c index 292567ab4c6c..2677709251ac 100644 --- a/drivers/spi/spi-sh-hspi.c +++ b/drivers/spi/spi-sh-hspi.c @@ -197,7 +197,7 @@ static int hspi_transfer_one_message(struct spi_master *master, hspi_write(hspi, SPTBR, tx); - /* wait recive */ + /* wait receive */ ret = hspi_status_check_timeout(hspi, 0x4, 0x4); if (ret < 0) break; From f21524f5bc6c7022928e32e6e5e36985ed4e8bbf Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 12 Jan 2014 14:04:15 +0100 Subject: [PATCH 095/112] spi: bitbang: Grammar s/make to make/to make/ Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi-bitbang-txrx.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-bitbang-txrx.h b/drivers/spi/spi-bitbang-txrx.h index c16bf853c3eb..c616e41521be 100644 --- a/drivers/spi/spi-bitbang-txrx.h +++ b/drivers/spi/spi-bitbang-txrx.h @@ -38,7 +38,7 @@ * * Since this is software, the timings may not be exactly what your board's * chips need ... there may be several reasons you'd need to tweak timings - * in these routines, not just make to make it faster or slower to match a + * in these routines, not just to make it faster or slower to match a * particular CPU clock rate. */ From 909e709c77df739ccba610dc48a301fd9ee8249c Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Mon, 13 Jan 2014 10:00:44 +0800 Subject: [PATCH 096/112] spi: sh: Use spi_sh_clear_bit() instead of open-coded We have a spi_sh_clear_bit() function, there's no reason not to use it. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi-sh.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/spi/spi-sh.c b/drivers/spi/spi-sh.c index c120a70094f2..9fea8ccdce45 100644 --- a/drivers/spi/spi-sh.c +++ b/drivers/spi/spi-sh.c @@ -171,7 +171,6 @@ static int spi_sh_send(struct spi_sh_data *ss, struct spi_message *mesg, int remain = t->len; int cur_len; unsigned char *data; - unsigned long tmp; long ret; if (t->len) @@ -213,9 +212,7 @@ static int spi_sh_send(struct spi_sh_data *ss, struct spi_message *mesg, } if (list_is_last(&t->transfer_list, &mesg->transfers)) { - tmp = spi_sh_read(ss, SPI_SH_CR1); - tmp = tmp & ~(SPI_SH_SSD | SPI_SH_SSDB); - spi_sh_write(ss, tmp, SPI_SH_CR1); + spi_sh_clear_bit(ss, SPI_SH_SSD | SPI_SH_SSDB, SPI_SH_CR1); spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1); ss->cr1 &= ~SPI_SH_TBE; @@ -239,7 +236,6 @@ static int spi_sh_receive(struct spi_sh_data *ss, struct spi_message *mesg, int remain = t->len; int cur_len; unsigned char *data; - unsigned long tmp; long ret; if (t->len > SPI_SH_MAX_BYTE) @@ -247,9 +243,7 @@ static int spi_sh_receive(struct spi_sh_data *ss, struct spi_message *mesg, else spi_sh_write(ss, t->len, SPI_SH_CR3); - tmp = spi_sh_read(ss, SPI_SH_CR1); - tmp = tmp & ~(SPI_SH_SSD | SPI_SH_SSDB); - spi_sh_write(ss, tmp, SPI_SH_CR1); + spi_sh_clear_bit(ss, SPI_SH_SSD | SPI_SH_SSDB, SPI_SH_CR1); spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1); spi_sh_wait_write_buffer_empty(ss); From 3e83c1949790d542435866651f451ddecc30ad41 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 12 Jan 2014 14:07:50 +0100 Subject: [PATCH 097/112] spi/s3c64xx: Correct indentation Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi-s3c64xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index b4ea9306cf35..ae907dde1371 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -890,7 +890,7 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, unsigned long flags; int use_dma; - reinit_completion(&sdd->xfer_completion); + reinit_completion(&sdd->xfer_completion); /* Only BPW and Speed may change across transfers */ bpw = xfer->bits_per_word; From e2e5ed79fed3a9be3846651ca5b463658f8ff6c9 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 12 Jan 2014 11:32:44 +0100 Subject: [PATCH 098/112] spi: rspi: Remove dependency on DMAE for SHMOBILE On ARM-based SHMOBILE, the rspi driver builds and works fine without the DMA controller driver, hence relax the dependencies. Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index eb1f1ef5fa2e..4f6fbfd71135 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -370,7 +370,7 @@ config SPI_PXA2XX_PCI config SPI_RSPI tristate "Renesas RSPI controller" - depends on (SUPERH || ARCH_SHMOBILE) && SH_DMAE_BASE + depends on (SUPERH && SH_DMAE_BASE) || ARCH_SHMOBILE help SPI driver for Renesas RSPI blocks. From 6ab4865b7e34e707857107ca76c0b98d87a992dd Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 12 Jan 2014 11:27:37 +0100 Subject: [PATCH 099/112] spi: rspi: Add more RSPI register documentation Signed-off-by: Geert Uytterhoeven Acked-by: Laurent Pinchart Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 171 ++++++++++++++++++++++------------------- 1 file changed, 92 insertions(+), 79 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 627126ae2571..1f69343689f9 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -37,27 +37,29 @@ #include #include -#define RSPI_SPCR 0x00 -#define RSPI_SSLP 0x01 -#define RSPI_SPPCR 0x02 -#define RSPI_SPSR 0x03 -#define RSPI_SPDR 0x04 -#define RSPI_SPSCR 0x08 -#define RSPI_SPSSR 0x09 -#define RSPI_SPBR 0x0a -#define RSPI_SPDCR 0x0b -#define RSPI_SPCKD 0x0c -#define RSPI_SSLND 0x0d -#define RSPI_SPND 0x0e -#define RSPI_SPCR2 0x0f -#define RSPI_SPCMD0 0x10 -#define RSPI_SPCMD1 0x12 -#define RSPI_SPCMD2 0x14 -#define RSPI_SPCMD3 0x16 -#define RSPI_SPCMD4 0x18 -#define RSPI_SPCMD5 0x1a -#define RSPI_SPCMD6 0x1c -#define RSPI_SPCMD7 0x1e +#define RSPI_SPCR 0x00 /* Control Register */ +#define RSPI_SSLP 0x01 /* Slave Select Polarity Register */ +#define RSPI_SPPCR 0x02 /* Pin Control Register */ +#define RSPI_SPSR 0x03 /* Status Register */ +#define RSPI_SPDR 0x04 /* Data Register */ +#define RSPI_SPSCR 0x08 /* Sequence Control Register */ +#define RSPI_SPSSR 0x09 /* Sequence Status Register */ +#define RSPI_SPBR 0x0a /* Bit Rate Register */ +#define RSPI_SPDCR 0x0b /* Data Control Register */ +#define RSPI_SPCKD 0x0c /* Clock Delay Register */ +#define RSPI_SSLND 0x0d /* Slave Select Negation Delay Register */ +#define RSPI_SPND 0x0e /* Next-Access Delay Register */ +#define RSPI_SPCR2 0x0f /* Control Register 2 */ +#define RSPI_SPCMD0 0x10 /* Command Register 0 */ +#define RSPI_SPCMD1 0x12 /* Command Register 1 */ +#define RSPI_SPCMD2 0x14 /* Command Register 2 */ +#define RSPI_SPCMD3 0x16 /* Command Register 3 */ +#define RSPI_SPCMD4 0x18 /* Command Register 4 */ +#define RSPI_SPCMD5 0x1a /* Command Register 5 */ +#define RSPI_SPCMD6 0x1c /* Command Register 6 */ +#define RSPI_SPCMD7 0x1e /* Command Register 7 */ +#define RSPI_SPBFCR 0x20 /* Buffer Control Register */ +#define RSPI_SPBFDR 0x22 /* Buffer Data Count Setting Register */ /*qspi only */ #define QSPI_SPBFCR 0x18 @@ -67,87 +69,98 @@ #define QSPI_SPBMUL2 0x24 #define QSPI_SPBMUL3 0x28 -/* SPCR */ -#define SPCR_SPRIE 0x80 -#define SPCR_SPE 0x40 -#define SPCR_SPTIE 0x20 -#define SPCR_SPEIE 0x10 -#define SPCR_MSTR 0x08 -#define SPCR_MODFEN 0x04 -#define SPCR_TXMD 0x02 -#define SPCR_SPMS 0x01 +/* SPCR - Control Register */ +#define SPCR_SPRIE 0x80 /* Receive Interrupt Enable */ +#define SPCR_SPE 0x40 /* Function Enable */ +#define SPCR_SPTIE 0x20 /* Transmit Interrupt Enable */ +#define SPCR_SPEIE 0x10 /* Error Interrupt Enable */ +#define SPCR_MSTR 0x08 /* Master/Slave Mode Select */ +#define SPCR_MODFEN 0x04 /* Mode Fault Error Detection Enable */ +/* RSPI on SH only */ +#define SPCR_TXMD 0x02 /* TX Only Mode (vs. Full Duplex) */ +#define SPCR_SPMS 0x01 /* 3-wire Mode (vs. 4-wire) */ -/* SSLP */ -#define SSLP_SSL1P 0x02 -#define SSLP_SSL0P 0x01 +/* SSLP - Slave Select Polarity Register */ +#define SSLP_SSL1P 0x02 /* SSL1 Signal Polarity Setting */ +#define SSLP_SSL0P 0x01 /* SSL0 Signal Polarity Setting */ -/* SPPCR */ -#define SPPCR_MOIFE 0x20 -#define SPPCR_MOIFV 0x10 +/* SPPCR - Pin Control Register */ +#define SPPCR_MOIFE 0x20 /* MOSI Idle Value Fixing Enable */ +#define SPPCR_MOIFV 0x10 /* MOSI Idle Fixed Value */ #define SPPCR_SPOM 0x04 -#define SPPCR_SPLP2 0x02 -#define SPPCR_SPLP 0x01 +#define SPPCR_SPLP2 0x02 /* Loopback Mode 2 (non-inverting) */ +#define SPPCR_SPLP 0x01 /* Loopback Mode (inverting) */ -/* SPSR */ -#define SPSR_SPRF 0x80 -#define SPSR_SPTEF 0x20 -#define SPSR_PERF 0x08 -#define SPSR_MODF 0x04 -#define SPSR_IDLNF 0x02 -#define SPSR_OVRF 0x01 +/* SPSR - Status Register */ +#define SPSR_SPRF 0x80 /* Receive Buffer Full Flag */ +#define SPSR_TEND 0x40 /* Transmit End */ +#define SPSR_SPTEF 0x20 /* Transmit Buffer Empty Flag */ +#define SPSR_PERF 0x08 /* Parity Error Flag */ +#define SPSR_MODF 0x04 /* Mode Fault Error Flag */ +#define SPSR_IDLNF 0x02 /* RSPI Idle Flag */ +#define SPSR_OVRF 0x01 /* Overrun Error Flag */ -/* SPSCR */ -#define SPSCR_SPSLN_MASK 0x07 +/* SPSCR - Sequence Control Register */ +#define SPSCR_SPSLN_MASK 0x07 /* Sequence Length Specification */ -/* SPSSR */ -#define SPSSR_SPECM_MASK 0x70 -#define SPSSR_SPCP_MASK 0x07 +/* SPSSR - Sequence Status Register */ +#define SPSSR_SPECM_MASK 0x70 /* Command Error Mask */ +#define SPSSR_SPCP_MASK 0x07 /* Command Pointer Mask */ -/* SPDCR */ -#define SPDCR_SPLW 0x20 -#define SPDCR_SPRDTD 0x10 +/* SPDCR - Data Control Register */ +#define SPDCR_TXDMY 0x80 /* Dummy Data Transmission Enable */ +#define SPDCR_SPLW1 0x40 /* Access Width Specification (RZ) */ +#define SPDCR_SPLW0 0x20 /* Access Width Specification (RZ) */ +#define SPDCR_SPLLWORD (SPDCR_SPLW1 | SPDCR_SPLW0) +#define SPDCR_SPLWORD SPDCR_SPLW1 +#define SPDCR_SPLBYTE SPDCR_SPLW0 +#define SPDCR_SPLW 0x20 /* Access Width Specification (SH) */ +#define SPDCR_SPRDTD 0x10 /* Receive Transmit Data Select */ #define SPDCR_SLSEL1 0x08 #define SPDCR_SLSEL0 0x04 -#define SPDCR_SLSEL_MASK 0x0c +#define SPDCR_SLSEL_MASK 0x0c /* SSL1 Output Select */ #define SPDCR_SPFC1 0x02 #define SPDCR_SPFC0 0x01 +#define SPDCR_SPFC_MASK 0x03 /* Frame Count Setting (1-4) */ -/* SPCKD */ -#define SPCKD_SCKDL_MASK 0x07 +/* SPCKD - Clock Delay Register */ +#define SPCKD_SCKDL_MASK 0x07 /* Clock Delay Setting (1-8) */ -/* SSLND */ -#define SSLND_SLNDL_MASK 0x07 +/* SSLND - Slave Select Negation Delay Register */ +#define SSLND_SLNDL_MASK 0x07 /* SSL Negation Delay Setting (1-8) */ -/* SPND */ -#define SPND_SPNDL_MASK 0x07 +/* SPND - Next-Access Delay Register */ +#define SPND_SPNDL_MASK 0x07 /* Next-Access Delay Setting (1-8) */ -/* SPCR2 */ -#define SPCR2_PTE 0x08 -#define SPCR2_SPIE 0x04 -#define SPCR2_SPOE 0x02 -#define SPCR2_SPPE 0x01 +/* SPCR2 - Control Register 2 */ +#define SPCR2_PTE 0x08 /* Parity Self-Test Enable */ +#define SPCR2_SPIE 0x04 /* Idle Interrupt Enable */ +#define SPCR2_SPOE 0x02 /* Odd Parity Enable (vs. Even) */ +#define SPCR2_SPPE 0x01 /* Parity Enable */ -/* SPCMDn */ -#define SPCMD_SCKDEN 0x8000 -#define SPCMD_SLNDEN 0x4000 -#define SPCMD_SPNDEN 0x2000 -#define SPCMD_LSBF 0x1000 -#define SPCMD_SPB_MASK 0x0f00 +/* SPCMDn - Command Registers */ +#define SPCMD_SCKDEN 0x8000 /* Clock Delay Setting Enable */ +#define SPCMD_SLNDEN 0x4000 /* SSL Negation Delay Setting Enable */ +#define SPCMD_SPNDEN 0x2000 /* Next-Access Delay Enable */ +#define SPCMD_LSBF 0x1000 /* LSB First */ +#define SPCMD_SPB_MASK 0x0f00 /* Data Length Setting */ #define SPCMD_SPB_8_TO_16(bit) (((bit - 1) << 8) & SPCMD_SPB_MASK) #define SPCMD_SPB_8BIT 0x0000 /* qspi only */ #define SPCMD_SPB_16BIT 0x0100 #define SPCMD_SPB_20BIT 0x0000 #define SPCMD_SPB_24BIT 0x0100 #define SPCMD_SPB_32BIT 0x0200 -#define SPCMD_SSLKP 0x0080 -#define SPCMD_SSLA_MASK 0x0030 -#define SPCMD_BRDV_MASK 0x000c -#define SPCMD_CPOL 0x0002 -#define SPCMD_CPHA 0x0001 +#define SPCMD_SSLKP 0x0080 /* SSL Signal Level Keeping */ +#define SPCMD_SSLA_MASK 0x0030 /* SSL Assert Signal Setting (RSPI) */ +#define SPCMD_BRDV_MASK 0x000c /* Bit Rate Division Setting */ +#define SPCMD_CPOL 0x0002 /* Clock Polarity Setting */ +#define SPCMD_CPHA 0x0001 /* Clock Phase Setting */ -/* SPBFCR */ -#define SPBFCR_TXRST 0x80 /* qspi only */ -#define SPBFCR_RXRST 0x40 /* qspi only */ +/* SPBFCR - Buffer Control Register */ +#define SPBFCR_TXRST 0x80 /* Transmit Buffer Data Reset (qspi only) */ +#define SPBFCR_RXRST 0x40 /* Receive Buffer Data Reset (qspi only) */ +#define SPBFCR_TXTRG_MASK 0x30 /* Transmit Buffer Data Triggering Number */ +#define SPBFCR_RXTRG_MASK 0x07 /* Receive Buffer Data Triggering Number */ #define DUMMY_DATA 0x00 From fbe5072bbeac5362edc8c49435b76e6df75a9d95 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 12 Jan 2014 11:27:38 +0100 Subject: [PATCH 100/112] spi: rspi: Add more QSPI register documentation Signed-off-by: Geert Uytterhoeven Acked-by: Laurent Pinchart Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 1f69343689f9..4a2c7592b5eb 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -62,12 +62,12 @@ #define RSPI_SPBFDR 0x22 /* Buffer Data Count Setting Register */ /*qspi only */ -#define QSPI_SPBFCR 0x18 -#define QSPI_SPBDCR 0x1a -#define QSPI_SPBMUL0 0x1c -#define QSPI_SPBMUL1 0x20 -#define QSPI_SPBMUL2 0x24 -#define QSPI_SPBMUL3 0x28 +#define QSPI_SPBFCR 0x18 /* Buffer Control Register */ +#define QSPI_SPBDCR 0x1a /* Buffer Data Count Register */ +#define QSPI_SPBMUL0 0x1c /* Transfer Data Length Multiplier Setting Register 0 */ +#define QSPI_SPBMUL1 0x20 /* Transfer Data Length Multiplier Setting Register 1 */ +#define QSPI_SPBMUL2 0x24 /* Transfer Data Length Multiplier Setting Register 2 */ +#define QSPI_SPBMUL3 0x28 /* Transfer Data Length Multiplier Setting Register 3 */ /* SPCR - Control Register */ #define SPCR_SPRIE 0x80 /* Receive Interrupt Enable */ @@ -79,6 +79,9 @@ /* RSPI on SH only */ #define SPCR_TXMD 0x02 /* TX Only Mode (vs. Full Duplex) */ #define SPCR_SPMS 0x01 /* 3-wire Mode (vs. 4-wire) */ +/* QSPI on R-Car M2 only */ +#define SPCR_WSWAP 0x02 /* Word Swap of read-data for DMAC */ +#define SPCR_BSWAP 0x01 /* Byte Swap of read-data for DMAC */ /* SSLP - Slave Select Polarity Register */ #define SSLP_SSL1P 0x02 /* SSL1 Signal Polarity Setting */ @@ -91,6 +94,9 @@ #define SPPCR_SPLP2 0x02 /* Loopback Mode 2 (non-inverting) */ #define SPPCR_SPLP 0x01 /* Loopback Mode (inverting) */ +#define SPPCR_IO3FV 0x04 /* Single-/Dual-SPI Mode IO3 Output Fixed Value */ +#define SPPCR_IO2FV 0x04 /* Single-/Dual-SPI Mode IO2 Output Fixed Value */ + /* SPSR - Status Register */ #define SPSR_SPRF 0x80 /* Receive Buffer Full Flag */ #define SPSR_TEND 0x40 /* Transmit End */ @@ -151,6 +157,13 @@ #define SPCMD_SPB_24BIT 0x0100 #define SPCMD_SPB_32BIT 0x0200 #define SPCMD_SSLKP 0x0080 /* SSL Signal Level Keeping */ +#define SPCMD_SPIMOD_MASK 0x0060 /* SPI Operating Mode (QSPI only) */ +#define SPCMD_SPIMOD1 0x0040 +#define SPCMD_SPIMOD0 0x0020 +#define SPCMD_SPIMOD_SINGLE 0 +#define SPCMD_SPIMOD_DUAL SPCMD_SPIMOD0 +#define SPCMD_SPIMOD_QUAD SPCMD_SPIMOD1 +#define SPCMD_SPRW 0x0010 /* SPI Read/Write Access (Dual/Quad) */ #define SPCMD_SSLA_MASK 0x0030 /* SSL Assert Signal Setting (RSPI) */ #define SPCMD_BRDV_MASK 0x000c /* Bit Rate Division Setting */ #define SPCMD_CPOL 0x0002 /* Clock Polarity Setting */ From 483c319188c74e82b29a0ed7a7fa7065570f2193 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Mon, 13 Jan 2014 11:17:04 +0200 Subject: [PATCH 101/112] spi/pxa2xx: initialize DMA channels to -1 to prevent inadvertent match Commit cddb339badb0 (spi/pxa2xx: convert to dma_request_slave_channel_compat()) converted the driver to use ACPI provided DMA helpers but it forgot to initialize the platform data for the channels to -1. Failing to do so will result inadvertent match in the filter function because 0 is a valid channel number. Prevent this from happening by initializing both platform data channels correctly to -1. Fixes: cddb339badb0 (spi/pxa2xx: convert to dma_request_slave_channel_compat()) Signed-off-by: Mika Westerberg Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- drivers/spi/spi-pxa2xx.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index cb0e1f1137ad..91815fa2d2fe 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1066,6 +1066,8 @@ pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev) pdata->num_chipselect = 1; pdata->enable_dma = true; + pdata->tx_chan_id = -1; + pdata->rx_chan_id = -1; return pdata; } From 348e5153bcf6c6a0a735eeb6f65e1aba8ffe2780 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 12 Jan 2014 11:27:43 +0100 Subject: [PATCH 102/112] spi: rspi: Add support for specifying CPHA/CPOL Add support for specifying the SPI clock phase and polarity, based on the SDK reference code. Signed-off-by: Geert Uytterhoeven Acked-by: Laurent Pinchart Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 4a2c7592b5eb..c3227fb44b03 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -187,6 +187,7 @@ struct rspi_data { spinlock_t lock; struct clk *clk; u8 spsr; + u16 spcmd; const struct spi_ops *ops; /* for dmaengine */ @@ -261,7 +262,7 @@ static int rspi_set_config_register(const struct rspi_data *rspi, rspi_write8(rspi, 0x00, RSPI_SPCR2); /* Sets SPCMD */ - rspi_write16(rspi, SPCMD_SPB_8_TO_16(access_size) | SPCMD_SSLKP, + rspi_write16(rspi, SPCMD_SPB_8_TO_16(access_size) | rspi->spcmd, RSPI_SPCMD0); /* Sets RSPI mode */ @@ -302,7 +303,7 @@ static int qspi_set_config_register(const struct rspi_data *rspi, else if (access_size == 32) spcmd = SPCMD_SPB_32BIT; - spcmd |= SPCMD_SCKDEN | SPCMD_SLNDEN | SPCMD_SSLKP | SPCMD_SPNDEN; + spcmd |= SPCMD_SCKDEN | SPCMD_SLNDEN | rspi->spcmd | SPCMD_SPNDEN; /* Resets transfer data length */ rspi_write32(rspi, 0, QSPI_SPBMUL0); @@ -805,6 +806,12 @@ static int rspi_setup(struct spi_device *spi) spi->bits_per_word = 8; rspi->max_speed_hz = spi->max_speed_hz; + rspi->spcmd = SPCMD_SSLKP; + if (spi->mode & SPI_CPOL) + rspi->spcmd |= SPCMD_CPOL; + if (spi->mode & SPI_CPHA) + rspi->spcmd |= SPCMD_CPHA; + set_config_register(rspi, 8); return 0; @@ -996,6 +1003,7 @@ static int rspi_probe(struct platform_device *pdev) master->setup = rspi_setup; master->transfer = rspi_transfer; master->cleanup = rspi_cleanup; + master->mode_bits = SPI_CPHA | SPI_CPOL; ret = request_irq(irq, rspi_irq, 0, dev_name(&pdev->dev), rspi); if (ret < 0) { From b7ed6b88b2a5e961eeb939ef637a3cbb435a23a7 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 14 Jan 2014 10:20:32 +0100 Subject: [PATCH 103/112] spi: rspi: Spelling s/transmition/transmission/ Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index c3227fb44b03..90c81b3f3431 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -378,7 +378,7 @@ static int rspi_send_pio(struct rspi_data *rspi, struct spi_message *mesg, remain--; } - /* Waiting for the last transmition */ + /* Waiting for the last transmission */ rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE); return 0; @@ -412,7 +412,7 @@ static int qspi_send_pio(struct rspi_data *rspi, struct spi_message *mesg, remain--; } - /* Waiting for the last transmition */ + /* Waiting for the last transmission */ rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE); return 0; From fcb4ed749c776a2ae89ca40343cbccb6f8981e60 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 14 Jan 2014 10:20:33 +0100 Subject: [PATCH 104/112] spi: rspi: Add missing clk_disable() calls in error and cleanup paths Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 587722495cf2..7838b7e71910 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -925,6 +925,7 @@ static int rspi_remove(struct platform_device *pdev) struct rspi_data *rspi = platform_get_drvdata(pdev); rspi_release_dma(rspi); + clk_disable(rspi->clk); return 0; } @@ -999,28 +1000,30 @@ static int rspi_probe(struct platform_device *pdev) dev_name(&pdev->dev), rspi); if (ret < 0) { dev_err(&pdev->dev, "request_irq error\n"); - goto error1; + goto error2; } rspi->irq = irq; ret = rspi_request_dma(rspi, pdev); if (ret < 0) { dev_err(&pdev->dev, "rspi_request_dma failed.\n"); - goto error2; + goto error3; } ret = devm_spi_register_master(&pdev->dev, master); if (ret < 0) { dev_err(&pdev->dev, "spi_register_master error.\n"); - goto error2; + goto error3; } dev_info(&pdev->dev, "probed\n"); return 0; -error2: +error3: rspi_release_dma(rspi); +error2: + clk_disable(rspi->clk); error1: spi_master_put(master); From 350a9b33046ef0d9909f68b87f411f4cf4e286f7 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Tue, 14 Jan 2014 17:01:54 +0800 Subject: [PATCH 105/112] spi: clps711x: Add MODULE_ALIAS to support module auto-loading Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi-clps711x.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c index dafb243a9143..374ba4a48a9e 100644 --- a/drivers/spi/spi-clps711x.c +++ b/drivers/spi/spi-clps711x.c @@ -257,3 +257,4 @@ module_platform_driver(clps711x_spi_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Alexander Shiyan "); MODULE_DESCRIPTION("CLPS711X SPI bus driver"); +MODULE_ALIAS("platform:" DRIVER_NAME); From 382cebb02a68764a51a412b8affccd325059d0a5 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Thu, 16 Jan 2014 14:50:55 +0200 Subject: [PATCH 106/112] spi/pxa2xx: fix compilation warning when !CONFIG_PM_SLEEP MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit CONFIG_PM will be set if either or both CONFIG_PM_SLEEP and CONFIG_PM_RUNTIME is set. Compiling the driver with !CONFIG_PM_SLEEP causes following compilation warning: drivers/spi/spi-pxa2xx.c:1270:12: warning: ‘pxa2xx_spi_suspend’ defined but not used [-Wunused-function] Fix this by using CONFIG_PM_SLEEP instead. Signed-off-by: Mika Westerberg Signed-off-by: Mark Brown --- drivers/spi/spi-pxa2xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index cb0e1f1137ad..7d98a64e6a09 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1264,7 +1264,7 @@ static void pxa2xx_spi_shutdown(struct platform_device *pdev) dev_err(&pdev->dev, "shutdown failed with %d\n", status); } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int pxa2xx_spi_suspend(struct device *dev) { struct driver_data *drv_data = dev_get_drvdata(dev); From 23061f1eb844edd349c3a0f5f40e244c9d2abfde Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 17 Jan 2014 18:53:40 +0800 Subject: [PATCH 107/112] spi: Remove duplicate code to set default bits_per_word setting The implementation in spi_setup() already set spi->bits_per_word = 8 when spi->bits_per_word is 0 before calling spi->master->setup. So we don't need to do it again in setup() callback. Signed-off-by: Axel Lin Acked-by: Marek Vasut Acked-by: Barry Song Acked-by: Guenter Roeck Signed-off-by: Mark Brown --- drivers/spi/spi-davinci.c | 4 ---- drivers/spi/spi-fsl-dspi.c | 3 --- drivers/spi/spi-mxs.c | 9 --------- drivers/spi/spi-rspi.c | 2 -- drivers/spi/spi-sc18is602.c | 3 --- drivers/spi/spi-sh.c | 3 --- drivers/spi/spi-sirf.c | 7 ------- drivers/spi/spi-topcliff-pch.c | 6 ------ 8 files changed, 37 deletions(-) diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c index 50b2d88c8190..ff22fb6a2a03 100644 --- a/drivers/spi/spi-davinci.c +++ b/drivers/spi/spi-davinci.c @@ -396,10 +396,6 @@ static int davinci_spi_setup(struct spi_device *spi) dspi = spi_master_get_devdata(spi->master); pdata = &dspi->pdata; - /* if bits per word length is zero then set it default 8 */ - if (!spi->bits_per_word) - spi->bits_per_word = 8; - if (!(spi->mode & SPI_NO_CS)) { if ((pdata->chip_sel == NULL) || (pdata->chip_sel[spi->chip_select] == SPI_INTERN_CS)) diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 8641b03bdd7a..649f9d13eac5 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -373,9 +373,6 @@ 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); } diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c index 3adebfa22e3d..79e5aa2250c8 100644 --- a/drivers/spi/spi-mxs.c +++ b/drivers/spi/spi-mxs.c @@ -111,14 +111,6 @@ static int mxs_spi_setup_transfer(struct spi_device *dev, return 0; } -static int mxs_spi_setup(struct spi_device *dev) -{ - if (!dev->bits_per_word) - dev->bits_per_word = 8; - - return 0; -} - static u32 mxs_spi_cs_to_reg(unsigned cs) { u32 select = 0; @@ -502,7 +494,6 @@ static int mxs_spi_probe(struct platform_device *pdev) return -ENOMEM; master->transfer_one_message = mxs_spi_transfer_one; - master->setup = mxs_spi_setup; master->bits_per_word_mask = SPI_BPW_MASK(8); master->mode_bits = SPI_CPOL | SPI_CPHA; master->num_chipselect = 3; diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 7838b7e71910..d1e89bb352d8 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -802,8 +802,6 @@ static int rspi_setup(struct spi_device *spi) { struct rspi_data *rspi = spi_master_get_devdata(spi->master); - if (!spi->bits_per_word) - spi->bits_per_word = 8; rspi->max_speed_hz = spi->max_speed_hz; rspi->spcmd = SPCMD_SSLKP; diff --git a/drivers/spi/spi-sc18is602.c b/drivers/spi/spi-sc18is602.c index c1a01d1ac315..1edffed9e098 100644 --- a/drivers/spi/spi-sc18is602.c +++ b/drivers/spi/spi-sc18is602.c @@ -254,9 +254,6 @@ error: static int sc18is602_setup(struct spi_device *spi) { - if (!spi->bits_per_word) - spi->bits_per_word = 8; - if (spi->mode & ~(SPI_CPHA | SPI_CPOL | SPI_LSB_FIRST)) return -EINVAL; diff --git a/drivers/spi/spi-sh.c b/drivers/spi/spi-sh.c index c120a70094f2..86a17d60a68c 100644 --- a/drivers/spi/spi-sh.c +++ b/drivers/spi/spi-sh.c @@ -358,9 +358,6 @@ static int spi_sh_setup(struct spi_device *spi) { struct spi_sh_data *ss = spi_master_get_devdata(spi->master); - if (!spi->bits_per_word) - spi->bits_per_word = 8; - pr_debug("%s: enter\n", __func__); spi_sh_write(ss, 0xfe, SPI_SH_CR1); /* SPI sycle stop */ diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c index ed5e501c4652..e430689c3837 100644 --- a/drivers/spi/spi-sirf.c +++ b/drivers/spi/spi-sirf.c @@ -536,16 +536,9 @@ spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t) static int spi_sirfsoc_setup(struct spi_device *spi) { - struct sirfsoc_spi *sspi; - if (!spi->max_speed_hz) return -EINVAL; - sspi = spi_master_get_devdata(spi->master); - - if (!spi->bits_per_word) - spi->bits_per_word = 8; - return spi_sirfsoc_setup_transfer(spi, NULL); } diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 446131308acb..9322de9e13fb 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -466,12 +466,6 @@ static void pch_spi_reset(struct spi_master *master) static int pch_spi_setup(struct spi_device *pspi) { - /* check bits per word */ - if (pspi->bits_per_word == 0) { - pspi->bits_per_word = 8; - dev_dbg(&pspi->dev, "%s 8 bits per word\n", __func__); - } - /* Check baud rate setting */ /* if baud rate of chip is greater than max we can support,return error */ From 463654cec26466a03615974444d6900f1cd0eeb9 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 17 Jan 2014 18:00:42 +0800 Subject: [PATCH 108/112] spi: sc18is602: Convert to use bits_per_word_mask Since commit 543bb25 "spi: add ability to validate xfer->bits_per_word in SPI core", the driver can set bits_per_word_mask for the master then the SPI core will reject transfers that attempt to use an unsupported bits_per_word value. So we can remove the bits_per_word checking in sc18is602_check_transfer() and let SPI core handle the checking. Signed-off-by: Axel Lin Acked-by: Guenter Roeck Signed-off-by: Mark Brown --- drivers/spi/spi-sc18is602.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/spi/spi-sc18is602.c b/drivers/spi/spi-sc18is602.c index c1a01d1ac315..c981d215b65b 100644 --- a/drivers/spi/spi-sc18is602.c +++ b/drivers/spi/spi-sc18is602.c @@ -183,18 +183,11 @@ static int sc18is602_setup_transfer(struct sc18is602 *hw, u32 hz, u8 mode) static int sc18is602_check_transfer(struct spi_device *spi, struct spi_transfer *t, int tlen) { - int bpw; uint32_t hz; if (t && t->len + tlen > SC18IS602_BUFSIZ) return -EINVAL; - bpw = spi->bits_per_word; - if (t && t->bits_per_word) - bpw = t->bits_per_word; - if (bpw != 8) - return -EINVAL; - hz = spi->max_speed_hz; if (t && t->speed_hz) hz = t->speed_hz; @@ -315,6 +308,7 @@ static int sc18is602_probe(struct i2c_client *client, } master->bus_num = client->adapter->nr; master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_LSB_FIRST; + master->bits_per_word_mask = SPI_BPW_MASK(8); master->setup = sc18is602_setup; master->transfer_one_message = sc18is602_transfer_one; master->dev.of_node = np; From 9e8f4882cc49205a688b616c1b6c17bade10587f Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 21 Jan 2014 16:10:05 +0100 Subject: [PATCH 109/112] spi: Spelling s/finised/finished/ Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- drivers/spi/spi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 51e00c6436aa..56b41099b40c 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -640,7 +640,7 @@ out: * * Called by SPI drivers using the core transfer_one_message() * implementation to notify it that the current interrupt driven - * transfer has finised and the next one may be scheduled. + * transfer has finished and the next one may be scheduled. */ void spi_finalize_current_transfer(struct spi_master *master) { From 0516712c6548e252adf7aebf70d67842cd734483 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 21 Jan 2014 16:10:06 +0100 Subject: [PATCH 110/112] spi: Clarify transfer_one() w.r.t. spi_finalize_current_transfer() Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- include/linux/spi/spi.h | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 8c62ba74dd91..e766e0e2fe58 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -282,10 +282,12 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) * @prepare_message: set up the controller to transfer a single message, * for example doing DMA mapping. Called from threaded * context. - * @transfer_one: transfer a single spi_transfer. When the - * driver is finished with this transfer it must call - * spi_finalize_current_transfer() so the subsystem can issue - * the next transfer + * @transfer_one: transfer a single spi_transfer. + * - return 0 if the transfer is finished, + * - return 1 if the transfer is still in progress. When + * the driver is finished with this transfer it must + * call spi_finalize_current_transfer() so the subsystem + * can issue the next transfer * @unprepare_message: undo any work done by prepare_message(). * @cs_gpios: Array of GPIOs to use as chip select lines; one per CS * number. Any individual value may be -ENOENT for CS lines that From bd6857a0c630207484a03ddc470fab34b23f80bb Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 21 Jan 2014 16:10:07 +0100 Subject: [PATCH 111/112] spi: Correct set_cs() documentation The documentation for spi_master.set_cs() says: assert or deassert chip select, true to assert i.e. its "enable" parameter uses assertion-level logic. This does not match the implementation of spi_set_cs(), which calls spi_master.set_cs() with the wanted logic level of the chip select line, which depends on the polarity of the chip select signal. Correct the documentation to match the implementation. Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- include/linux/spi/spi.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index e766e0e2fe58..9f5242df9311 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -277,7 +277,7 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) * @unprepare_transfer_hardware: there are currently no more messages on the * queue so the subsystem notifies the driver that it may relax the * hardware by issuing this call - * @set_cs: assert or deassert chip select, true to assert. May be called + * @set_cs: set the logic level of the chip select line. May be called * from interrupt context. * @prepare_message: set up the controller to transfer a single message, * for example doing DMA mapping. Called from threaded From 13a4279880229240af38486611c94587492b24d3 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sat, 18 Jan 2014 22:05:22 +0800 Subject: [PATCH 112/112] spi: core: Fix transfer failure when master->transfer_one returns positive value master->transfer_one returns positive value is not a error. So set ret to 0 when master->transfer_one returns positive value. Otherwise, I hit "spi_master spi0: failed to transfer one message from queue" error when my transfer_one callback returns 1. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/spi/spi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 56b41099b40c..8ed1aee13c6f 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -599,8 +599,10 @@ static int spi_transfer_one_message(struct spi_master *master, goto out; } - if (ret > 0) + if (ret > 0) { + ret = 0; wait_for_completion(&master->xfer_completion); + } trace_spi_transfer_stop(msg, xfer);