From: Mark Brown <broonie@kernel.org> To: Kamal Dasu <kdasu.kdev@gmail.com> Cc: Mark Brown <broonie@kernel.org>, broonie@kernel.org, rnd@arndb.de, cyrille.pitchen@atmel.com, geert+renesas@glider.be, hauke@hauke-m.de, f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org Subject: Applied "spi: bcm-qspi: Remove hardcoded settings and spi-nor.h dependency" to the spi tree Date: Fri, 28 Jul 2017 11:18:40 +0100 [thread overview] Message-ID: <E1db2Lw-0003w8-SS@debutante> (raw) In-Reply-To: <1501111215-2654-1-git-send-email-kdasu.kdev@gmail.com> The patch spi: bcm-qspi: Remove hardcoded settings and spi-nor.h dependency has been applied to the spi tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From 054e532f8f90daaf9d70a2cf2ce31e69a4e68031 Mon Sep 17 00:00:00 2001 From: Kamal Dasu <kdasu.kdev@gmail.com> Date: Wed, 26 Jul 2017 19:20:15 -0400 Subject: [PATCH] spi: bcm-qspi: Remove hardcoded settings and spi-nor.h dependency The newly added broadcom qspi driver in drivers/spi produces a build warning when CONFIG_MTD is disabled: include/linux/mtd/cfi.h:76:2: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work. [-Werror=cpp] There has been discussion on this in the link provided below. This fix in SPI controller drivers implementing the ->spi_flash_read handler, now uses the settings provided inside the 'struct spi_flash_read_message' parameter instead of hardcoding them. Made changes to bcm_qspi_bspi_set_flex_mode() to set the BSPI controller using the passed msg structure and remove the need to include <linux/mtd/spi-nor.h> file by removing all use of SPINOR_OP_READ* macros. Fixes: 4e3b2d236fe0 ("spi: bcm-qspi: Add BSPI spi-nor flash controller driver") Link: https://patchwork.kernel.org/patch/9624585/ Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org> --- drivers/spi/spi-bcm-qspi.c | 89 +++++++++++++++++----------------------------- 1 file changed, 33 insertions(+), 56 deletions(-) diff --git a/drivers/spi/spi-bcm-qspi.c b/drivers/spi/spi-bcm-qspi.c index b19722ba908c..6ef6c44f39f5 100644 --- a/drivers/spi/spi-bcm-qspi.c +++ b/drivers/spi/spi-bcm-qspi.c @@ -25,7 +25,6 @@ #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/mtd/spi-nor.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/platform_device.h> @@ -349,76 +348,60 @@ static void bcm_qspi_bspi_set_xfer_params(struct bcm_qspi *qspi, u8 cmd_byte, bcm_qspi_write(qspi, BSPI, BSPI_FLEX_MODE_ENABLE, flex_mode); } -static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi, int width, - int addrlen, int hp) +static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi, + struct spi_flash_read_message *msg, + int hp) { int bpc = 0, bpp = 0; - u8 command = SPINOR_OP_READ_FAST; - int flex_mode = 1, rv = 0; - bool spans_4byte = false; + u8 command = msg->read_opcode; + int width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE; + int addrlen = msg->addr_width; + int addr_nbits = msg->addr_nbits ? msg->addr_nbits : SPI_NBITS_SINGLE; + int flex_mode = 1; dev_dbg(&qspi->pdev->dev, "set flex mode w %x addrlen %x hp %d\n", width, addrlen, hp); - if (addrlen == BSPI_ADDRLEN_4BYTES) { + if (addrlen == BSPI_ADDRLEN_4BYTES) bpp = BSPI_BPP_ADDR_SELECT_MASK; - spans_4byte = true; - } - bpp |= 8; + bpp |= msg->dummy_bytes * (8/addr_nbits); switch (width) { case SPI_NBITS_SINGLE: if (addrlen == BSPI_ADDRLEN_3BYTES) /* default mode, does not need flex_cmd */ flex_mode = 0; - else - command = SPINOR_OP_READ_FAST_4B; break; case SPI_NBITS_DUAL: bpc = 0x00000001; if (hp) { bpc |= 0x00010100; /* address and mode are 2-bit */ bpp = BSPI_BPP_MODE_SELECT_MASK; - command = OPCODE_DIOR; - if (spans_4byte) - command = OPCODE_DIOR_4B; - } else { - command = SPINOR_OP_READ_1_1_2; - if (spans_4byte) - command = SPINOR_OP_READ_1_1_2_4B; } break; case SPI_NBITS_QUAD: bpc = 0x00000002; if (hp) { bpc |= 0x00020200; /* address and mode are 4-bit */ - bpp = 4; /* dummy cycles */ - bpp |= BSPI_BPP_ADDR_SELECT_MASK; - command = OPCODE_QIOR; - if (spans_4byte) - command = OPCODE_QIOR_4B; - } else { - command = SPINOR_OP_READ_1_1_4; - if (spans_4byte) - command = SPINOR_OP_READ_1_1_4_4B; + bpp |= BSPI_BPP_MODE_SELECT_MASK; } break; default: - rv = -EINVAL; - break; + return -EINVAL; } - if (rv == 0) - bcm_qspi_bspi_set_xfer_params(qspi, command, bpp, bpc, - flex_mode); + bcm_qspi_bspi_set_xfer_params(qspi, command, bpp, bpc, flex_mode); - return rv; + return 0; } -static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi, int width, - int addrlen, int hp) +static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi, + struct spi_flash_read_message *msg, + int hp) { + int width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE; + int addrlen = msg->addr_width; u32 data = bcm_qspi_read(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL); dev_dbg(&qspi->pdev->dev, "set override mode w %x addrlen %x hp %d\n", @@ -430,7 +413,6 @@ static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi, int width, data &= ~(BSPI_STRAP_OVERRIDE_CTRL_DATA_QUAD | BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL); break; - case SPI_NBITS_QUAD: /* clear dual mode and set quad mode */ data &= ~BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL; @@ -455,15 +437,17 @@ static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi, int width, /* set the override mode */ data |= BSPI_STRAP_OVERRIDE_CTRL_OVERRIDE; bcm_qspi_write(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL, data); - bcm_qspi_bspi_set_xfer_params(qspi, SPINOR_OP_READ_FAST, 0, 0, 0); + bcm_qspi_bspi_set_xfer_params(qspi, msg->read_opcode, 0, 0, 0); return 0; } static int bcm_qspi_bspi_set_mode(struct bcm_qspi *qspi, - int width, int addrlen, int hp) + struct spi_flash_read_message *msg, int hp) { int error = 0; + int width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE; + int addrlen = msg->addr_width; /* default mode */ qspi->xfer_mode.flex_mode = true; @@ -475,23 +459,13 @@ static int bcm_qspi_bspi_set_mode(struct bcm_qspi *qspi, mask = BSPI_STRAP_OVERRIDE_CTRL_OVERRIDE; if (val & mask || qspi->s3_strap_override_ctrl & mask) { qspi->xfer_mode.flex_mode = false; - bcm_qspi_write(qspi, BSPI, BSPI_FLEX_MODE_ENABLE, - 0); - - if ((val | qspi->s3_strap_override_ctrl) & - BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL) - width = SPI_NBITS_DUAL; - else if ((val | qspi->s3_strap_override_ctrl) & - BSPI_STRAP_OVERRIDE_CTRL_DATA_QUAD) - width = SPI_NBITS_QUAD; - - error = bcm_qspi_bspi_set_override(qspi, width, addrlen, - hp); + bcm_qspi_write(qspi, BSPI, BSPI_FLEX_MODE_ENABLE, 0); + error = bcm_qspi_bspi_set_override(qspi, msg, hp); } } if (qspi->xfer_mode.flex_mode) - error = bcm_qspi_bspi_set_flex_mode(qspi, width, addrlen, hp); + error = bcm_qspi_bspi_set_flex_mode(qspi, msg, hp); if (error) { dev_warn(&qspi->pdev->dev, @@ -981,7 +955,7 @@ static int bcm_qspi_flash_read(struct spi_device *spi, struct bcm_qspi *qspi = spi_master_get_devdata(spi->master); int ret = 0; bool mspi_read = false; - u32 io_width, addrlen, addr, len; + u32 addr, len; u_char *buf; buf = msg->buf; @@ -1010,9 +984,7 @@ static int bcm_qspi_flash_read(struct spi_device *spi, if (mspi_read) return bcm_qspi_mspi_flash_read(spi, msg); - io_width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE; - addrlen = msg->addr_width; - ret = bcm_qspi_bspi_set_mode(qspi, io_width, addrlen, -1); + ret = bcm_qspi_bspi_set_mode(qspi, msg, -1); if (!ret) ret = bcm_qspi_bspi_flash_read(spi, msg); @@ -1422,6 +1394,11 @@ static int __maybe_unused bcm_qspi_suspend(struct device *dev) { struct bcm_qspi *qspi = dev_get_drvdata(dev); + /* store the override strap value */ + if (!bcm_qspi_bspi_ver_three(qspi)) + qspi->s3_strap_override_ctrl = + bcm_qspi_read(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL); + spi_master_suspend(qspi->master); clk_disable(qspi->clk); bcm_qspi_hw_uninit(qspi); -- 2.13.2
WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> To: Kamal Dasu <kdasu.kdev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Cc: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, rnd-r2nGTMty4D4@public.gmane.org, cyrille.pitchen-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org, geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org, hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org, f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, bcm-kernel-feedback-list-dY08KVG/lbpWk0Htik3J/w@public.gmane.org, linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: Applied "spi: bcm-qspi: Remove hardcoded settings and spi-nor.h dependency" to the spi tree Date: Fri, 28 Jul 2017 11:18:40 +0100 [thread overview] Message-ID: <E1db2Lw-0003w8-SS@debutante> (raw) In-Reply-To: <1501111215-2654-1-git-send-email-kdasu.kdev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> The patch spi: bcm-qspi: Remove hardcoded settings and spi-nor.h dependency has been applied to the spi tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From 054e532f8f90daaf9d70a2cf2ce31e69a4e68031 Mon Sep 17 00:00:00 2001 From: Kamal Dasu <kdasu.kdev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Date: Wed, 26 Jul 2017 19:20:15 -0400 Subject: [PATCH] spi: bcm-qspi: Remove hardcoded settings and spi-nor.h dependency The newly added broadcom qspi driver in drivers/spi produces a build warning when CONFIG_MTD is disabled: include/linux/mtd/cfi.h:76:2: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work. [-Werror=cpp] There has been discussion on this in the link provided below. This fix in SPI controller drivers implementing the ->spi_flash_read handler, now uses the settings provided inside the 'struct spi_flash_read_message' parameter instead of hardcoding them. Made changes to bcm_qspi_bspi_set_flex_mode() to set the BSPI controller using the passed msg structure and remove the need to include <linux/mtd/spi-nor.h> file by removing all use of SPINOR_OP_READ* macros. Fixes: 4e3b2d236fe0 ("spi: bcm-qspi: Add BSPI spi-nor flash controller driver") Link: https://patchwork.kernel.org/patch/9624585/ Signed-off-by: Kamal Dasu <kdasu.kdev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Signed-off-by: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> --- drivers/spi/spi-bcm-qspi.c | 89 +++++++++++++++++----------------------------- 1 file changed, 33 insertions(+), 56 deletions(-) diff --git a/drivers/spi/spi-bcm-qspi.c b/drivers/spi/spi-bcm-qspi.c index b19722ba908c..6ef6c44f39f5 100644 --- a/drivers/spi/spi-bcm-qspi.c +++ b/drivers/spi/spi-bcm-qspi.c @@ -25,7 +25,6 @@ #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/mtd/spi-nor.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/platform_device.h> @@ -349,76 +348,60 @@ static void bcm_qspi_bspi_set_xfer_params(struct bcm_qspi *qspi, u8 cmd_byte, bcm_qspi_write(qspi, BSPI, BSPI_FLEX_MODE_ENABLE, flex_mode); } -static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi, int width, - int addrlen, int hp) +static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi, + struct spi_flash_read_message *msg, + int hp) { int bpc = 0, bpp = 0; - u8 command = SPINOR_OP_READ_FAST; - int flex_mode = 1, rv = 0; - bool spans_4byte = false; + u8 command = msg->read_opcode; + int width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE; + int addrlen = msg->addr_width; + int addr_nbits = msg->addr_nbits ? msg->addr_nbits : SPI_NBITS_SINGLE; + int flex_mode = 1; dev_dbg(&qspi->pdev->dev, "set flex mode w %x addrlen %x hp %d\n", width, addrlen, hp); - if (addrlen == BSPI_ADDRLEN_4BYTES) { + if (addrlen == BSPI_ADDRLEN_4BYTES) bpp = BSPI_BPP_ADDR_SELECT_MASK; - spans_4byte = true; - } - bpp |= 8; + bpp |= msg->dummy_bytes * (8/addr_nbits); switch (width) { case SPI_NBITS_SINGLE: if (addrlen == BSPI_ADDRLEN_3BYTES) /* default mode, does not need flex_cmd */ flex_mode = 0; - else - command = SPINOR_OP_READ_FAST_4B; break; case SPI_NBITS_DUAL: bpc = 0x00000001; if (hp) { bpc |= 0x00010100; /* address and mode are 2-bit */ bpp = BSPI_BPP_MODE_SELECT_MASK; - command = OPCODE_DIOR; - if (spans_4byte) - command = OPCODE_DIOR_4B; - } else { - command = SPINOR_OP_READ_1_1_2; - if (spans_4byte) - command = SPINOR_OP_READ_1_1_2_4B; } break; case SPI_NBITS_QUAD: bpc = 0x00000002; if (hp) { bpc |= 0x00020200; /* address and mode are 4-bit */ - bpp = 4; /* dummy cycles */ - bpp |= BSPI_BPP_ADDR_SELECT_MASK; - command = OPCODE_QIOR; - if (spans_4byte) - command = OPCODE_QIOR_4B; - } else { - command = SPINOR_OP_READ_1_1_4; - if (spans_4byte) - command = SPINOR_OP_READ_1_1_4_4B; + bpp |= BSPI_BPP_MODE_SELECT_MASK; } break; default: - rv = -EINVAL; - break; + return -EINVAL; } - if (rv == 0) - bcm_qspi_bspi_set_xfer_params(qspi, command, bpp, bpc, - flex_mode); + bcm_qspi_bspi_set_xfer_params(qspi, command, bpp, bpc, flex_mode); - return rv; + return 0; } -static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi, int width, - int addrlen, int hp) +static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi, + struct spi_flash_read_message *msg, + int hp) { + int width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE; + int addrlen = msg->addr_width; u32 data = bcm_qspi_read(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL); dev_dbg(&qspi->pdev->dev, "set override mode w %x addrlen %x hp %d\n", @@ -430,7 +413,6 @@ static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi, int width, data &= ~(BSPI_STRAP_OVERRIDE_CTRL_DATA_QUAD | BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL); break; - case SPI_NBITS_QUAD: /* clear dual mode and set quad mode */ data &= ~BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL; @@ -455,15 +437,17 @@ static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi, int width, /* set the override mode */ data |= BSPI_STRAP_OVERRIDE_CTRL_OVERRIDE; bcm_qspi_write(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL, data); - bcm_qspi_bspi_set_xfer_params(qspi, SPINOR_OP_READ_FAST, 0, 0, 0); + bcm_qspi_bspi_set_xfer_params(qspi, msg->read_opcode, 0, 0, 0); return 0; } static int bcm_qspi_bspi_set_mode(struct bcm_qspi *qspi, - int width, int addrlen, int hp) + struct spi_flash_read_message *msg, int hp) { int error = 0; + int width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE; + int addrlen = msg->addr_width; /* default mode */ qspi->xfer_mode.flex_mode = true; @@ -475,23 +459,13 @@ static int bcm_qspi_bspi_set_mode(struct bcm_qspi *qspi, mask = BSPI_STRAP_OVERRIDE_CTRL_OVERRIDE; if (val & mask || qspi->s3_strap_override_ctrl & mask) { qspi->xfer_mode.flex_mode = false; - bcm_qspi_write(qspi, BSPI, BSPI_FLEX_MODE_ENABLE, - 0); - - if ((val | qspi->s3_strap_override_ctrl) & - BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL) - width = SPI_NBITS_DUAL; - else if ((val | qspi->s3_strap_override_ctrl) & - BSPI_STRAP_OVERRIDE_CTRL_DATA_QUAD) - width = SPI_NBITS_QUAD; - - error = bcm_qspi_bspi_set_override(qspi, width, addrlen, - hp); + bcm_qspi_write(qspi, BSPI, BSPI_FLEX_MODE_ENABLE, 0); + error = bcm_qspi_bspi_set_override(qspi, msg, hp); } } if (qspi->xfer_mode.flex_mode) - error = bcm_qspi_bspi_set_flex_mode(qspi, width, addrlen, hp); + error = bcm_qspi_bspi_set_flex_mode(qspi, msg, hp); if (error) { dev_warn(&qspi->pdev->dev, @@ -981,7 +955,7 @@ static int bcm_qspi_flash_read(struct spi_device *spi, struct bcm_qspi *qspi = spi_master_get_devdata(spi->master); int ret = 0; bool mspi_read = false; - u32 io_width, addrlen, addr, len; + u32 addr, len; u_char *buf; buf = msg->buf; @@ -1010,9 +984,7 @@ static int bcm_qspi_flash_read(struct spi_device *spi, if (mspi_read) return bcm_qspi_mspi_flash_read(spi, msg); - io_width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE; - addrlen = msg->addr_width; - ret = bcm_qspi_bspi_set_mode(qspi, io_width, addrlen, -1); + ret = bcm_qspi_bspi_set_mode(qspi, msg, -1); if (!ret) ret = bcm_qspi_bspi_flash_read(spi, msg); @@ -1422,6 +1394,11 @@ static int __maybe_unused bcm_qspi_suspend(struct device *dev) { struct bcm_qspi *qspi = dev_get_drvdata(dev); + /* store the override strap value */ + if (!bcm_qspi_bspi_ver_three(qspi)) + qspi->s3_strap_override_ctrl = + bcm_qspi_read(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL); + spi_master_suspend(qspi->master); clk_disable(qspi->clk); bcm_qspi_hw_uninit(qspi); -- 2.13.2 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2017-07-28 10:19 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-07-26 23:20 [PATCH] spi: bcm-qspi: Remove hardcoded settings and spi-nor.h dependency Kamal Dasu 2017-07-28 10:18 ` Mark Brown [this message] 2017-07-28 10:18 ` Applied "spi: bcm-qspi: Remove hardcoded settings and spi-nor.h dependency" to the spi tree Mark Brown
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