diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-13 10:03:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-13 10:03:12 -0700 |
| commit | a996b9c61729cd1507e48303c214dc317df890e2 (patch) | |
| tree | 4a46ef47ff55ebe968b3b6596a5b7f281666b1e2 | |
| parent | 1724e02e024adf5a17da12fad6819e30d304da7d (diff) | |
| parent | 988731181359efd771ae967f94936906fa38868a (diff) | |
Merge tag 'spi-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi updates from Mark Brown:
"There's quite a lot of changes for SPI in this release but none in the
core, they're all mostly small driver updates and additions. Some of
the more notable changes include:
- A huge set of cleanups, optimizations and improvements for the
DesignWare driver from Serge Semin finishing up the work started
last release.
- Conversion of the Zynq gqspi driver to spi-mem.
- Support for Baikal T1, Broadcom BCMSTB 7445, and Renesas R8A7742"
* tag 'spi-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (137 commits)
spi: cadence: Add SPI transfer delays
spi: dw: Add Baikal-T1 SPI Controller bindings
spi: dw: Add Baikal-T1 SPI Controller glue driver
spi: dw: Add poll-based SPI transfers support
spi: dw: Introduce max mem-ops SPI bus frequency setting
spi: dw: Add memory operations support
spi: dw: Add generic DW SSI status-check method
spi: dw: Move num-of retries parameter to the header file
spi: dw: Explicitly de-assert CS on SPI transfer completion
spi: dw: De-assert chip-select on reset
spi: dw: Discard chip enabling on DMA setup error
spi: dw: Unmask IRQs after enabling the chip
spi: dw: Perform IRQ setup in a dedicated function
spi: dw: Refactor IRQ-based SPI transfer procedure
spi: dw: Refactor data IO procedure
spi: dw: Add DW SPI controller config structure
spi: dw: Update Rx sample delay in the config function
spi: dw: Simplify the SPI bus speed config procedure
spi: dw: Update SPI bus speed in a config function
spi: dw: Detach SPI device specific CR0 config method
...
51 files changed, 2913 insertions, 1277 deletions
diff --git a/Documentation/devicetree/bindings/fsi/ibm,fsi2spi.yaml b/Documentation/devicetree/bindings/fsi/ibm,fsi2spi.yaml index b26d4b4be743..fe39ea4904c1 100644 --- a/Documentation/devicetree/bindings/fsi/ibm,fsi2spi.yaml +++ b/Documentation/devicetree/bindings/fsi/ibm,fsi2spi.yaml @@ -19,6 +19,7 @@ properties: compatible: enum: - ibm,fsi2spi + - ibm,fsi2spi-restricted reg: items: diff --git a/Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.txt b/Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.txt index 62d4ed2d7fd7..d99a9cf3336b 100644 --- a/Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.txt +++ b/Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.txt @@ -32,6 +32,8 @@ Required properties: BRCMSTB SoCs "brcm,spi-bcm7435-qspi", "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI BRCMSTB SoCs + "brcm,spi-bcm7445-qspi", "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI + BRCMSTB SoCs "brcm,spi-bcm7216-qspi", "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI BRCMSTB SoCs "brcm,spi-bcm7278-qspi", "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI diff --git a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-nor.yaml b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-nor.yaml new file mode 100644 index 000000000000..55c239446a5b --- /dev/null +++ b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-nor.yaml @@ -0,0 +1,86 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/mediatek,spi-mtk-nor.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Serial NOR flash controller for MediaTek ARM SoCs + +maintainers: + - Bayi Cheng <bayi.cheng@mediatek.com> + - Chuanhong Guo <gch981213@gmail.com> + +description: | + This spi controller support single, dual, or quad mode transfer for + SPI NOR flash. There should be only one spi slave device following + generic spi bindings. It's not recommended to use this controller + for devices other than SPI NOR flash due to limited transfer + capability of this controller. + +allOf: + - $ref: /spi/spi-controller.yaml# + +properties: + compatible: + oneOf: + - items: + - enum: + - mediatek,mt2701-nor + - mediatek,mt2712-nor + - mediatek,mt7622-nor + - mediatek,mt7623-nor + - mediatek,mt7629-nor + - mediatek,mt8192-nor + - enum: + - mediatek,mt8173-nor + - items: + - const: mediatek,mt8173-nor + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + items: + - description: clock used for spi bus + - description: clock used for controller + + clock-names: + items: + - const: spi + - const: sf + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/clock/mt8173-clk.h> + + soc { + #address-cells = <2>; + #size-cells = <2>; + + nor_flash: spi@1100d000 { + compatible = "mediatek,mt8173-nor"; + reg = <0 0x1100d000 0 0xe0>; + interrupts = <&spi_flash_irq>; + clocks = <&pericfg CLK_PERI_SPI>, <&topckgen CLK_TOP_SPINFI_IFR_SEL>; + clock-names = "spi", "sf"; + #address-cells = <1>; + #size-cells = <0>; + + flash@0 { + compatible = "jedec,spi-nor"; + reg = <0>; + }; + }; + }; + diff --git a/Documentation/devicetree/bindings/spi/renesas,rspi.yaml b/Documentation/devicetree/bindings/spi/renesas,rspi.yaml index c54ac059043f..0d201ce1d5da 100644 --- a/Documentation/devicetree/bindings/spi/renesas,rspi.yaml +++ b/Documentation/devicetree/bindings/spi/renesas,rspi.yaml @@ -25,6 +25,7 @@ properties: - items: - enum: + - renesas,qspi-r8a7742 # RZ/G1H - renesas,qspi-r8a7743 # RZ/G1M - renesas,qspi-r8a7744 # RZ/G1N - renesas,qspi-r8a7745 # RZ/G1E diff --git a/Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml b/Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml index 9f7b118adcaf..3d3b60ee1ca4 100644 --- a/Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml +++ b/Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml @@ -41,6 +41,7 @@ properties: - renesas,msiof-r8a774e1 # RZ/G2H - renesas,msiof-r8a7795 # R-Car H3 - renesas,msiof-r8a7796 # R-Car M3-W + - renesas,msiof-r8a77961 # R-Car M3-W+ - renesas,msiof-r8a77965 # R-Car M3-N - renesas,msiof-r8a77970 # R-Car V3M - renesas,msiof-r8a77980 # R-Car V3H diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml index c62cbe79f00d..99ed9b416e94 100644 --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml @@ -22,6 +22,21 @@ allOf: properties: reg: minItems: 2 + - if: + properties: + compatible: + contains: + enum: + - baikal,bt1-sys-ssi + then: + properties: + mux-controls: + maxItems: 1 + required: + - mux-controls + else: + required: + - interrupts properties: compatible: @@ -36,6 +51,8 @@ properties: - mscc,ocelot-spi - mscc,jaguar2-spi - const: snps,dw-apb-ssi + - description: Microchip Sparx5 SoC SPI Controller + const: microchip,sparx5-spi - description: Amazon Alpine SPI Controller const: amazon,alpine-dw-apb-ssi - description: Renesas RZ/N1 SPI Controller @@ -44,12 +61,16 @@ properties: - const: snps,dw-apb-ssi - description: Intel Keem Bay SPI Controller const: intel,keembay-ssi + - description: Baikal-T1 SPI Controller + const: baikal,bt1-ssi + - description: Baikal-T1 System Boot SPI Controller + const: baikal,bt1-sys-ssi reg: minItems: 1 items: - description: DW APB SSI controller memory mapped registers - - description: SPI MST region map + - description: SPI MST region map or directly mapped SPI ROM interrupts: maxItems: 1 @@ -93,6 +114,12 @@ properties: - const: tx - const: rx + rx-sample-delay-ns: + default: 0 + description: Default value of the rx-sample-delay-ns property. + This value will be used if the property is not explicitly defined + for a SPI slave device. See below. + patternProperties: "^.*@[0-9a-f]+$": type: object @@ -107,6 +134,13 @@ patternProperties: spi-tx-bus-width: const: 1 + rx-sample-delay-ns: + description: SPI Rx sample delay offset, unit is nanoseconds. + The delay from the default sample time before the actual + sample of the rxd input signal occurs. The "rx_sample_delay" + is an optional feature of the designware controller, and the + upper limit is also subject to controller configuration. + unevaluatedProperties: false required: @@ -114,7 +148,6 @@ required: - reg - "#address-cells" - "#size-cells" - - interrupts - clocks examples: @@ -129,5 +162,22 @@ examples: num-cs = <2>; cs-gpios = <&gpio0 13 0>, <&gpio0 14 0>; + rx-sample-delay-ns = <3>; + spi-flash@1 { + compatible = "spi-nand"; + reg = <1>; + rx-sample-delay-ns = <7>; + }; + }; + - | + spi@1f040100 { + compatible = "baikal,bt1-sys-ssi"; + reg = <0x1f040100 0x900>, + <0x1c000000 0x1000000>; + #address-cells = <1>; + #size-cells = <0>; + mux-controls = <&boot_mux>; + clocks = <&ccu_sys>; + clock-names = "ssi_clk"; }; ... diff --git a/Documentation/devicetree/bindings/spi/spi-mtk-nor.txt b/Documentation/devicetree/bindings/spi/spi-mtk-nor.txt deleted file mode 100644 index 984ae7fd4f94..000000000000 --- a/Documentation/devicetree/bindings/spi/spi-mtk-nor.txt +++ /dev/null @@ -1,47 +0,0 @@ -* Serial NOR flash controller for MediaTek ARM SoCs - -Required properties: -- compatible: For mt8173, compatible should be "mediatek,mt8173-nor", - and it's the fallback compatible for other Soc. - For every other SoC, should contain both the SoC-specific compatible - string and "mediatek,mt8173-nor". - The possible values are: - "mediatek,mt2701-nor", "mediatek,mt8173-nor" - "mediatek,mt2712-nor", "mediatek,mt8173-nor" - "mediatek,mt7622-nor", "mediatek,mt8173-nor" - "mediatek,mt7623-nor", "mediatek,mt8173-nor" - "mediatek,mt7629-nor", "mediatek,mt8173-nor" - "mediatek,mt8173-nor" -- reg: physical base address and length of the controller's register -- interrupts: Interrupt number used by the controller. -- clocks: the phandle of the clocks needed by the nor controller -- clock-names: the names of the clocks - the clocks should be named "spi" and "sf". "spi" is used for spi bus, - and "sf" is used for controller, these are the clocks witch - hardware needs to enabling nor flash and nor flash controller. - See Documentation/devicetree/bindings/clock/clock-bindings.txt for details. -- #address-cells: should be <1> -- #size-cells: should be <0> - -There should be only one spi slave device following generic spi bindings. -It's not recommended to use this controller for devices other than SPI NOR -flash due to limited transfer capability of this controller. - -Example: - -nor_flash: spi@1100d000 { - compatible = "mediatek,mt8173-nor"; - reg = <0 0x1100d000 0 0xe0>; - interrupts = <&spi_flash_irq>; - clocks = <&pericfg CLK_PERI_SPI>, - <&topckgen CLK_TOP_SPINFI_IFR_SEL>; - clock-names = "spi", "sf"; - #address-cells = <1>; - #size-cells = <0>; - - flash@0 { - compatible = "jedec,spi-nor"; - reg = <0>; - }; -}; - diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index c6ea760ea5f0..d2c976e55b8b 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -235,6 +235,7 @@ config SPI_DAVINCI config SPI_DESIGNWARE tristate "DesignWare SPI controller core support" + imply SPI_MEM help general driver for SPI controller core from DesignWare @@ -251,6 +252,34 @@ config SPI_DW_MMIO tristate "Memory-mapped io interface driver for DW SPI core" depends on HAS_IOMEM +config SPI_DW_BT1 + tristate "Baikal-T1 SPI driver for DW SPI core" + depends on MIPS_BAIKAL_T1 || COMPILE_TEST + help + Baikal-T1 SoC is equipped with three DW APB SSI-based MMIO SPI + controllers. Two of them are pretty much normal: with IRQ, DMA, + FIFOs of 64 words depth, 4x CSs, but the third one as being a + part of the Baikal-T1 System Boot Controller has got a very + limited resources: no IRQ, no DMA, only a single native + chip-select and Tx/Rx FIFO with just 8 words depth available. + The later one is normally connected to an external SPI-nor flash + of 128Mb (in general can be of bigger size). + +config SPI_DW_BT1_DIRMAP + bool "Directly mapped Baikal-T1 Boot SPI flash support" + depends on SPI_DW_BT1 + select MULTIPLEXER + select MUX_MMIO + help + Directly mapped SPI flash memory is an interface specific to the + Baikal-T1 System Boot Controller. It is a 16MB MMIO region, which + can be used to access a peripheral memory device just by + reading/writing data from/to it. Note that the system APB bus + will stall during each IO from/to the dirmap region until the + operation is finished. So try not to use it concurrently with + time-critical tasks (like the SPI memory operations implemented + in this driver). + endif config SPI_DLN2 @@ -637,7 +666,7 @@ config SPI_QCOM_QSPI config SPI_QUP tristate "Qualcomm SPI controller with QUP interface" - depends on ARCH_QCOM || (ARM && COMPILE_TEST) + depends on ARCH_QCOM || COMPILE_TEST help Qualcomm Universal Peripheral (QUP) core is an AHB slave that provides a common data path (an output FIFO and an input FIFO) diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index cf955ea803cd..21dc75842aca 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -39,6 +39,7 @@ obj-$(CONFIG_SPI_DLN2) += spi-dln2.o obj-$(CONFIG_SPI_DESIGNWARE) += spi-dw.o spi-dw-y := spi-dw-core.o spi-dw-$(CONFIG_SPI_DW_DMA) += spi-dw-dma.o +obj-$(CONFIG_SPI_DW_BT1) += spi-dw-bt1.o obj-$(CONFIG_SPI_DW_MMIO) += spi-dw-mmio.o obj-$(CONFIG_SPI_DW_PCI) += spi-dw-pci.o obj-$(CONFIG_SPI_EFM32) += spi-efm32.o diff --git a/drivers/spi/spi-armada-3700.c b/drivers/spi/spi-armada-3700.c index fcde419e480c..46feafe4e201 100644 --- a/drivers/spi/spi-armada-3700.c +++ b/drivers/spi/spi-armada-3700.c @@ -848,7 +848,6 @@ static int a3700_spi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, master); spi = spi_master_get_devdata(master); - memset(spi, 0, sizeof(struct a3700_spi)); spi->master = master; diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index 2cfe6253a784..ce5bd06d49b7 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -513,9 +513,8 @@ static int atmel_spi_configure_dma(struct spi_master *master, master->dma_tx = dma_request_chan(dev, "tx"); if (IS_ERR(master->dma_tx)) { - err = PTR_ERR(master->dma_tx); - if (err != -EPROBE_DEFER) - dev_err(dev, "No TX DMA channel, DMA is disabled\n"); + err = dev_err_probe(dev, PTR_ERR(master->dma_tx), + "No TX DMA channel, DMA is disabled\n"); goto error_clear; } @@ -859,6 +858,7 @@ static int atmel_spi_set_xfer_speed(struct atmel_spi *as, csr = spi_readl(as, CSR0 + 4 * chip_select); csr = SPI_BFINS(SCBR, scbr, csr); spi_writel(as, CSR0 + 4 * chip_select, csr); + xfer->effective_speed_hz = bus_hz / scbr; return 0; } diff --git a/drivers/spi/spi-bcm-qspi.c b/drivers/spi/spi-bcm-qspi.c index 9cfa15ec8b08..14c9d0133bce 100644 --- a/drivers/spi/spi-bcm-qspi.c +++ b/drivers/spi/spi-bcm-qspi.c @@ -1282,16 +1282,9 @@ static const struct bcm_qspi_data bcm_qspi_spcr3_data = { static const struct of_device_id bcm_qspi_of_match[] = { { - .compatible = "brcm,spi-bcm7425-qspi", - .data = &bcm_qspi_no_rev_data, - }, - { - .compatible = "brcm,spi-bcm7429-qspi", - .data = &bcm_qspi_no_rev_data, - }, - { - .compatible = "brcm,spi-bcm7435-qspi", - .data = &bcm_qspi_no_rev_data, + .compatible = "brcm,spi-bcm7445-qspi", + .data = &bcm_qspi_rev_data, + }, { .compatible = "brcm,spi-bcm-qspi", diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c index 41986ac0fbfb..b87116e9b413 100644 --- a/drivers/spi/spi-bcm2835.c +++ b/drivers/spi/spi-bcm2835.c @@ -1319,11 +1319,8 @@ static int bcm2835_spi_probe(struct platform_device *pdev) bs->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(bs->clk)) { - err = PTR_ERR(bs->clk); - if (err == -EPROBE_DEFER) - dev_dbg(&pdev->dev, "could not get clk: %d\n", err); - else - dev_err(&pdev->dev, "could not get clk: %d\n", err); + err = dev_err_probe(&pdev->dev, PTR_ERR(bs->clk), + "could not get clk\n"); goto out_controller_put; } diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c index c6795c684b16..40938cf3806d 100644 --- a/drivers/spi/spi-cadence-quadspi.c +++ b/drivers/spi/spi-cadence-quadspi.c @@ -1119,11 +1119,8 @@ static int cqspi_request_mmap_dma(struct cqspi_st *cqspi) cqspi->rx_chan = dma_request_chan_by_mask(&mask); if (IS_ERR(cqspi->rx_chan)) { int ret = PTR_ERR(cqspi->rx_chan); - - if (ret != -EPROBE_DEFER) - dev_err(&cqspi->pdev->dev, "No Rx DMA available\n"); cqspi->rx_chan = NULL; - return ret; + return dev_err_probe(&cqspi->pdev->dev, ret, "No Rx DMA available\n"); } init_completion(&cqspi->rx_dma_complete); diff --git a/drivers/spi/spi-cadence.c b/drivers/spi/spi-cadence.c index 2b6b9c1ad9d0..70467b9d61ba 100644 --- a/drivers/spi/spi-cadence.c +++ b/drivers/spi/spi-cadence.c @@ -418,8 +418,8 @@ static int cdns_transfer_one(struct spi_master *master, xspi->rx_bytes = transfer->len; cdns_spi_setup_transfer(spi, transfer); - cdns_spi_fill_tx_fifo(xspi); + spi_transfer_delay_exec(transfer); cdns_spi_write(xspi, CDNS_SPI_IER, CDNS_SPI_IXR_DEFAULT); return transfer->len; diff --git a/drivers/spi/spi-dw-bt1.c b/drivers/spi/spi-dw-bt1.c new file mode 100644 index 000000000000..f382dfad7842 --- /dev/null +++ b/drivers/spi/spi-dw-bt1.c @@ -0,0 +1,339 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Copyright (C) 2020 BAIKAL ELECTRONICS, JSC +// +// Authors: +// Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru> +// Serge Semin <Sergey.Semin@baikalelectronics.ru> +// +// Baikal-T1 DW APB SPI and System Boot SPI driver +// + +#include <linux/clk.h> +#include <linux/cpumask.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/mux/consumer.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/property.h> +#include <linux/slab.h> +#include <linux/spi/spi-mem.h> +#include <linux/spi/spi.h> + +#include "spi-dw.h" + +#define BT1_BOOT_DIRMAP 0 +#define BT1_BOOT_REGS 1 + +struct dw_spi_bt1 { + struct dw_spi dws; + struct clk *clk; + struct mux_control *mux; + +#ifdef CONFIG_SPI_DW_BT1_DIRMAP + void __iomem *map; + resource_size_t map_len; +#endif +}; +#define to_dw_spi_bt1(_ctlr) \ + container_of(spi_controller_get_devdata(_ctlr), struct dw_spi_bt1, dws) + +typedef int (*dw_spi_bt1_init_cb)(struct platform_device *pdev, + struct dw_spi_bt1 *dwsbt1); + +#ifdef CONFIG_SPI_DW_BT1_DIRMAP + +static int dw_spi_bt1_dirmap_create(struct spi_mem_dirmap_desc *desc) +{ + struct dw_spi_bt1 *dwsbt1 = to_dw_spi_bt1(desc->mem->spi->controller); + + if (!dwsbt1->map || + !dwsbt1->dws.mem_ops.supports_op(desc->mem, &desc->info.op_tmpl)) + return -EOPNOTSUPP; + + /* + * Make sure the requested region doesn't go out of the physically + * mapped flash memory bounds and the operation is read-only. + */ + if (desc->info.offset + desc->info.length > dwsbt1->map_len || + desc->info.op_tmpl.data.dir != SPI_MEM_DATA_IN) + return -EOPNOTSUPP; + + return 0; +} + +/* + * Directly mapped SPI memory region is only accessible in the dword chunks. + * That's why we have to create a dedicated read-method to copy data from there + * to the passed buffer. + */ +static void dw_spi_bt1_dirmap_copy_from_map(void *to, void __iomem *from, size_t len) +{ + size_t shift, chunk; + u32 data; + + /* + * We split the copying up into the next three stages: unaligned head, + * aligned body, unaligned tail. + */ + shift = (size_t)from & 0x3; + if (shift) { + chunk = min_t(size_t, 4 - shift, len); + data = readl_relaxed(from - shift); + memcpy(to, &data + shift, chunk); + from += chunk; + to += chunk; + len -= chunk; + } + + while (len >= 4) { + data = readl_relaxed(from); + memcpy(to, &data, 4); + from += 4; + to += 4; + len -= 4; + } + + if (len) { + data = readl_relaxed(from); + memcpy(to, &data, len); + } +} + +static ssize_t dw_spi_bt1_dirmap_read(struct spi_mem_dirmap_desc *desc, + u64 offs, size_t len, void *buf) +{ + struct dw_spi_bt1 *dwsbt1 = to_dw_spi_bt1(desc->mem->spi->controller); + struct dw_spi *dws = &dwsbt1->dws; + struct spi_mem *mem = desc->mem; + struct dw_spi_cfg cfg; + int ret; + + /* + * Make sure the requested operation length is valid. Truncate the + * length if it's greater than the length of the MMIO region. + */ + if (offs >= dwsbt1->map_len || !len) + return 0; + + len = min_t(size_t, len, dwsbt1->map_len - offs); + + /* Collect the controller configuration required by the operation */ + cfg.tmode = SPI_TMOD_EPROMREAD; + cfg.dfs = 8; + cfg.ndf = 4; + cfg.freq = mem->spi->max_speed_hz; + + /* Make sure the corresponding CS is de-asserted on transmission */ + dw_spi_set_cs(mem->spi, false); + + spi_enable_chip(dws, 0); + + dw_spi_update_config(dws, mem->spi, &cfg); + + spi_umask_intr(dws, SPI_INT_RXFI); + + spi_enable_chip(dws, 1); + + /* + * Enable the transparent mode of the System Boot Controller. + * The SPI core IO should have been locked before calling this method + * so noone would be touching the controller' registers during the + * dirmap operation. + */ + ret = mux_control_select(dwsbt1->mux, BT1_BOOT_DIRMAP); + if (ret) + return ret; + + dw_spi_bt1_dirmap_copy_from_map(buf, dwsbt1->map + offs, len); + + mux_control_deselect(dwsbt1->mux); + + dw_spi_set_cs(mem->spi, true); + + ret = dw_spi_check_status(dws, true); + + return ret ?: len; +} + +#endif /* CONFIG_SPI_DW_BT1_DIRMAP */ + +static int dw_spi_bt1_std_init(struct platform_device *pdev, + struct dw_spi_bt1 *dwsbt1) +{ + struct dw_spi *dws = &dwsbt1->dws; + + dws->irq = platform_get_irq(pdev, 0); + if (dws->irq < 0) + return dws->irq; + + dws->num_cs = 4; + + /* + * Baikal-T1 Normal SPI Controllers don't always keep up with full SPI + * bus speed especially when it comes to the concurrent access to the + * APB bus resources. Thus we have no choice but to set a constraint on + * the SPI bus frequency for the memory operations which require to + * read/write data as fast as possible. + */ + dws->max_mem_freq = 20000000U; + + dw_spi_dma_setup_generic(dws); + + return 0; +} + +static int dw_spi_bt1_sys_init(struct platform_device *pdev, + struct dw_spi_bt1 *dwsbt1) +{ + struct resource *mem __maybe_unused; + struct dw_spi *dws = &dwsbt1->dws; + + /* + * Baikal-T1 System Boot Controller is equipped with a mux, which + * switches between the directly mapped SPI flash access mode and + * IO access to the DW APB SSI registers. Note the mux controller + * must be setup to preserve the registers being accessible by default + * (on idle-state). + */ + dwsbt1->mux = devm_mux_control_get(&pdev->dev, NULL); + if (IS_ERR(dwsbt1->mux)) + return PTR_ERR(dwsbt1->mux); + + /* + * Directly mapped SPI flash memory is a 16MB MMIO region, which can be + * used to access a peripheral memory device just by reading/writing + * data from/to it. Note the system APB bus will stall during each IO + * from/to the dirmap region until the operation is finished. So don't + * use it concurrently with time-critical tasks (like the SPI memory + * operations implemented in the DW APB SSI driver). + */ +#ifdef CONFIG_SPI_DW_BT1_DIRMAP + mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (mem) { + dwsbt1->map = devm_ioremap_resource(&pdev->dev, mem); + if (!IS_ERR(dwsbt1->map)) { + dwsbt1->map_len = (mem->end - mem->start + 1); + dws->mem_ops.dirmap_create = dw_spi_bt1_dirmap_create; + dws->mem_ops.dirmap_read = dw_spi_bt1_dirmap_read; + } else { + dwsbt1->map = NULL; + } + } +#endif /* CONFIG_SPI_DW_BT1_DIRMAP */ + + /* + * There is no IRQ, no DMA and just one CS available on the System Boot + * SPI controller. + */ + dws->irq = IRQ_NOTCONNECTED; + dws->num_cs = 1; + + /* + * Baikal-T1 System Boot SPI Controller doesn't keep up with the full + * SPI bus speed due to relatively slow APB bus and races for it' + * resources from different CPUs. The situation is worsen by a small + * FIFOs depth (just 8 words). It works better in a single CPU mode + * though, but still tends to be not fast enough at low CPU + * frequencies. + */ + if (num_possible_cpus() > 1) + dws->max_mem_freq = 10000000U; + else + dws->max_mem_freq = 20000000U; + + return 0; +} + +static int dw_spi_bt1_probe(struct platform_device *pdev) +{ + dw_spi_bt1_init_cb init_func; + struct dw_spi_bt1 *dwsbt1; + struct resource *mem; + struct dw_spi *dws; + int ret; + + dwsbt1 = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_bt1), GFP_KERNEL); + if (!dwsbt1) + return -ENOMEM; + + dws = &dwsbt1->dws; + + dws->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem); + if (IS_ERR(dws->regs)) + return PTR_ERR(dws->regs); + + dws->paddr = mem->start; + + dwsbt1->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(dwsbt1->clk)) + return PTR_ERR(dwsbt1->clk); + + ret = clk_prepare_enable(dwsbt1->clk); + if (ret) + return ret; + + dws->bus_num = pdev->id; + dws->reg_io_width = 4; + dws->max_freq = clk_get_rate(dwsbt1->clk); + if (!dws->max_freq) + goto err_disable_clk; + + init_func = device_get_match_data(&pdev->dev); + ret = init_func(pdev, dwsbt1); + if (ret) + goto err_disable_clk; + + pm_runtime_enable(&pdev->dev); + + ret = dw_spi_add_host(&pdev->dev, dws); + if (ret) + goto err_disable_clk; + + platform_set_drvdata(pdev, dwsbt1); + + return 0; + +err_disable_clk: + clk_disable_unprepare(dwsbt1->clk); + + return ret; +} + +static int dw_spi_bt1_remove(struct platform_device *pdev) +{ + struct dw_spi_bt1 *dwsbt1 = platform_get_drvdata(pdev); + + dw_spi_remove_host(&dwsbt1->dws); + + pm_runtime_disable(&pdev->dev); + + clk_disable_unprepare(dwsbt1->clk); + + return 0; +} + +static const struct of_device_id dw_spi_bt1_of_match[] = { + { .compatible = "baikal,bt1-ssi", .data = dw_spi_bt1_std_init}, + { .compatible = "baikal,bt1-sys-ssi", .data = dw_spi_bt1_sys_init}, + { } +}; +MODULE_DEVICE_TABLE(of, dw_spi_bt1_of_match); + +static struct platform_driver dw_spi_bt1_driver = { + .probe = dw_spi_bt1_probe, + .remove = dw_spi_bt1_remove, + .driver = { + .name = "bt1-sys-ssi", + .of_match_table = dw_spi_bt1_of_match, + }, +}; +module_platform_driver(dw_spi_bt1_driver); + +MODULE_AUTHOR("Serge Semin <Sergey.Semin@baikalelectronics.ru>"); +MODULE_DESCRIPTION("Baikal-T1 System Boot SPI Controller driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c index 323c66c5db50..2e50cc0a9291 100644 --- a/drivers/spi/spi-dw-core.c +++ b/drivers/spi/spi-dw-core.c @@ -8,10 +8,14 @@ #include <linux/dma-mapping.h> #include <linux/interrupt.h> #include <linux/module.h> +#include <linux/preempt.h> #include <linux/highmem.h> #include <linux/delay.h> #include <linux/slab.h> #include <linux/spi/spi.h> +#include <linux/spi/spi-mem.h> +#include <linux/string.h> +#include <linux/of.h> #include "spi-dw.h" @@ -19,13 +23,10 @@ #include <linux/debugfs.h> #endif -/* Slave spi_dev related */ +/* Slave spi_device related */ struct chip_data { - u8 tmode; /* TR/TO/RO/EEPROM */ - u8 type; /* SPI/SSP/MicroWire */ - - u16 clk_div; /* baud rate divider */ - u32 speed_hz; /* baud rate */ + u32 cr0; + u32 rx_sample_dly; /* RX sample delay */ }; #ifdef CONFIG_DEBUG_FS @@ -52,6 +53,7 @@ static const struct debugfs_reg32 dw_spi_dbgfs_regs[] = { DW_SPI_DBGFS_REG("DMACR", DW_SPI_DMACR), DW_SPI_DBGFS_REG("DMATDLR", DW_SPI_DMATDLR), DW_SPI_DBGFS_REG("DMARDLR", DW_SPI_DMARDLR), + DW_SPI_DBGFS_REG("RX_SAMPLE_DLY", DW_SPI_RX_SAMPLE_DLY), }; static int dw_spi_debugfs_init(struct dw_spi *dws) @@ -101,7 +103,7 @@ void dw_spi_set_cs(struct spi_device *spi, bool enable) */ if (cs_high == enable) dw_writel(dws, DW_SPI_SER, BIT(spi->chip_select)); - else if (dws->cs_override) + else dw_writel(dws, DW_SPI_SER, 0); } EXPORT_SYMBOL_GPL(dw_spi_set_cs); @@ -109,9 +111,8 @@ EXPORT_SYMBOL_GPL(dw_spi_set_cs); /* Return the max entries we can fill into tx fifo */ static inline u32 tx_max(struct dw_spi *dws) { - u32 tx_left, tx_room, rxtx_gap; + u32 tx_room, rxtx_gap; - tx_left = (dws->tx_end - dws->tx) / dws->n_bytes; tx_room = dws->fifo_len - dw_readl(dws, DW_SPI_TXFLR); /* @@ -122,93 +123,124 @@ static inline u32 tx_max(struct dw_spi *dws) * shift registers. So a control from sw point of * view is taken. */ - rxtx_gap = ((dws->rx_end - dws->rx) - (dws->tx_end - dws->tx)) - / dws->n_bytes; + rxtx_gap = dws->fifo_len - (dws->rx_len - dws->tx_len); - return min3(tx_left, tx_room, (u32) (dws->fifo_len - rxtx_gap)); + return min3((u32)dws->tx_len, tx_room, rxtx_gap); } /* Return the max entries we should read out of rx fifo */ static inline u32 rx_max(struct dw_spi *dws) { - u32 rx_left = (dws->rx_end - dws->rx) / dws->n_bytes; - - return min_t(u32, rx_left, dw_readl(dws, DW_SPI_RXFLR)); + return min_t(u32, dws->rx_len, dw_readl(dws, DW_SPI_RXFLR)); } static void dw_writer(struct dw_spi *dws) { - u32 max; + u32 max = tx_max(dws); u16 txw = 0; - spin_lock(&dws->buf_lock); - max = tx_max(dws); while (max--) { - /* Set the tx word if the transfer's original "tx" is not null */ - if (dws->tx_end - dws->len) { + if (dws->tx) { if (dws->n_bytes == 1) txw = *(u8 *)(dws->tx); else txw = *(u16 *)(dws->tx); + + dws->tx += dws->n_bytes; } dw_write_io_reg(dws, DW_SPI_DR, txw); - dws->tx += dws->n_bytes; + --dws->tx_len; } - spin_unlock(&dws->buf_lock); } static void dw_reader(struct dw_spi *dws) { - u32 max; + u32 max = rx_max(dws); u16 rxw; - spin_lock(&dws->buf_lock); - max = rx_max(dws); while (max--) { rxw = dw_read_io_reg(dws, DW_SPI_DR); - /* Care rx only if the transfer's original "rx" is not null */ - if (dws->rx_end - dws->len) { + if (dws->rx) { if (dws->n_bytes == 1) *(u8 *)(dws->rx) = rxw; else *(u16 *)(dws->rx) = rxw; + + dws->rx += dws->n_bytes; } - dws->rx += dws->n_bytes; + --dws->rx_len; } - spin_unlock(&dws->buf_lock); } -static void int_error_stop(struct dw_spi *dws, const char *msg) +int dw_spi_check_status(struct dw_spi *dws, bool raw) { - spi_reset_chip(dws); + u32 irq_status; + int ret = 0; + + if (raw) + irq_status = dw_readl(dws, DW_SPI_RISR); + else + irq_status = dw_readl(dws, DW_SPI_ISR); + + if (irq_status & SPI_INT_RXOI) { + dev_err(&dws->master->dev, "RX FIFO overflow detected\n"); + ret = -EIO; + } + + if (irq_status & SPI_INT_RXUI) { + dev_err(&dws->master->dev, "RX FIFO underflow detected\n"); + ret = -EIO; + } + + if (irq_status & SPI_INT_TXOI) { + dev_err(&dws->master->dev, "TX FIFO overflow detected\n"); + ret = -EIO; + } - dev_err(&dws->master->dev, "%s\n", msg); - dws->master->cur_msg->status = -EIO; - spi_finalize_current_transfer(dws->master); + /* Generically handle the erroneous situation */ + if (ret) { + spi_reset_chip(dws); + if (dws->master->cur_msg) + dws->master->cur_msg->status = ret; + } + + return ret; } +EXPORT_SYMBOL_GPL(dw_spi_check_status); -static irqreturn_t interrupt_transfer(struct dw_spi *dws) +static irqreturn_t dw_spi_transfer_handler(struct dw_spi *dws) { u16 irq_status = dw_readl(dws, DW_SPI_ISR); - /* Error handling */ - if (irq_status & (SPI_INT_TXOI | SPI_INT_RXOI | SPI_INT_RXUI)) { - dw_readl(dws, DW_SPI_ICR); - int_error_stop(dws, "interrupt_transfer: fifo overrun/underrun"); + if (dw_spi_check_status(dws, false)) { + spi_finalize_current_transfer(dws->master); return IRQ_HANDLED; } + /* + * Read data from the Rx FIFO every time we've got a chance executing + * this method. If there is nothing left to receive, terminate the + * procedure. Otherwise adjust the Rx FIFO Threshold level if it's a + * final stage of the transfer. By doing so we'll get the next IRQ + * right when the leftover incoming data is received. + */ dw_reader(dws); - if (dws->rx_end == dws->rx) { - spi_mask_intr(dws, SPI_INT_TXEI); + if (!dws->rx_len) { + spi_mask_intr(dws, 0xff); spi_finalize_current_transfer(dws->master); - return IRQ_HANDLED; + } else if (dws->rx_len <= dw_readl(dws, DW_SPI_RXFTLR)) { + dw_writel(dws, DW_SPI_RXFTLR, dws->rx_len - 1); } + + /* + * Send data out if Tx FIFO Empty IRQ is received. The IRQ will be + * disabled after the data transmission is finished so not to + * have the TXE IRQ flood at the final stage of the transfer. + */ if (irq_status & SPI_INT_TXEI) { - spi_mask_intr(dws, SPI_INT_TXEI); dw_writer(dws); - /* Enable TX irq always, it will be disabled when RX finished */ - spi_umask_intr(dws, SPI_INT_TXEI); + if (!dws->tx_len) + spi_mask_intr(dws, SPI_INT_TXEI); } return IRQ_HANDLED; @@ -224,105 +256,176 @@ static irqreturn_t dw_spi_irq(int irq, void *dev_id) return IRQ_NONE; if (!master->cur_msg) { - spi_mask_intr(dws, SPI_INT_TXEI); + spi_mask_intr(dws, 0xff); return IRQ_HANDLED; } return dws->transfer_handler(dws); } -/* Configure CTRLR0 for DW_apb_ssi */ -u32 dw_spi_update_cr0(struct spi_controller *master, struct spi_device *spi, - struct spi_transfer *transfer) +static u32 dw_spi_prepare_cr0(struct dw_spi *dws, struct spi_device *spi) { - struct chip_data *chip = spi_get_ctldata(spi); - u32 cr0; - - /* Default SPI mode is SCPOL = 0, SCPH = 0 */ - cr0 = (transfer->bits_per_word - 1) - | (chip->type << SPI_FRF_OFFSET) - | ((((spi->mode & SPI_CPOL) ? 1 : 0) << SPI_SCOL_OFFSET) | - (((spi->mode & SPI_CPHA) ? 1 : 0) << SPI_SCPH_OFFSET) | - (((spi->mode & SPI_LOOP) ? 1 : 0) << SPI_SRL_OFFSET)) - | (chip->tmode << SPI_TMOD_OFFSET); + u32 cr0 = 0; + + if (!(dws->caps & DW_SPI_CAP_DWC_SSI)) { + /* CTRLR0[ 5: 4] Frame Format */ + cr0 |= SSI_MOTO_SPI << SPI_FRF_OFFSET; + + /* + * SPI mode (SCPOL|SCPH) + * CTRLR0[ 6] Serial Clock Phase + * CTRLR0[ 7] Serial Clock Polarity + */ + cr0 |= ((spi->mode & SPI_CPOL) ? 1 : 0) << SPI_SCOL_OFFSET; + cr0 |= ((spi->mode & SPI_CPHA) ? 1 : 0) << SPI_SCPH_OFFSET; + + /* CTRLR0[11] Shift Register Loop */ + cr0 |= ((spi->mode & SPI_LOOP) ? 1 : 0) << SPI_SRL_OFFSET; + } else { + /* CTRLR0[ 7: 6] Frame Format */ + cr0 |= SSI_MOTO_SPI << DWC_SSI_CTRLR0_FRF_OFFSET; + + /* + * SPI mode (SCPOL|SCPH) + * CTRLR0[ 8] Serial Clock Phase + * CTRLR0[ 9] Serial Clock Polarity + */ + cr0 |= ((spi->mode & SPI_CPOL) ? 1 : 0) << DWC_SSI_CTRLR0_SCPOL_OFFSET; + cr0 |= ((spi->mode & SPI_CPHA) ? 1 : 0) << DWC_SSI_CTRLR0_SCPH_OFFSET; + + /* CTRLR0[13] Shift Register Loop */ + cr0 |= ((spi->mode & SPI_LOOP) ? 1 : 0) << DWC_SSI_CTRLR0_SRL_OFFSET; + + if (dws->caps & DW_SPI_CAP_KEEMBAY_MST) + cr0 |= DWC_SSI_CTRLR0_KEEMBAY_MST; + } return cr0; } -EXPORT_SYMBOL_GPL(dw_spi_update_cr0); -/* Configure CTRLR0 for DWC_ssi */ -u32 dw_spi_update_cr0_v1_01a(struct spi_controller *master, - struct spi_device *spi, - struct spi_transfer *transfer) +void dw_spi_update_config(struct dw_spi *dws, struct spi_device *spi, + struct dw_spi_cfg *cfg) { struct chip_data *chip = spi_get_ctldata(spi); - u32 cr0; + u32 cr0 = chip->cr0; + u32 speed_hz; + u16 clk_div; + + /* CTRLR0[ 4/3: 0] Data Frame Size */ + cr0 |= (cfg->dfs - 1); + + if (!(dws->caps & DW_SPI_CAP_DWC_SSI)) + /* CTRLR0[ 9:8] Transfer Mode */ + cr0 |= cfg->tmode << SPI_TMOD_OFFSET; + else + /* CTRLR0[11:10] Transfer Mode */ + cr0 |= cfg->tmode << DWC_SSI_CTRLR0_TMOD_OFFSET; + + dw_writel(dws, DW_SPI_CTRLR0, cr0); + + if (cfg->tmode == SPI_TMOD_EPROMREAD || cfg->tmode == SPI_TMOD_RO) + dw_writel(dws, DW_SPI_CTRLR1, cfg->ndf ? cfg->ndf - 1 : 0); + + /* Note DW APB SSI clock divider doesn't support odd numbers */ + clk_div = (DIV_ROUND_UP(dws->max_freq, cfg->freq) + 1) & 0xfffe; + speed_hz = dws->max_freq / clk_div; + + if (dws->current_freq != speed_hz) { + spi_set_clk(dws, clk_div); + dws->current_freq = speed_hz; + } - /* CTRLR0[ 4: 0] Data Frame Size */ - cr0 = (transfer->bits_per_word - 1); + /* Update RX sample delay if required */ + if (dws->cur_rx_sample_dly != chip->rx_sample_dly) { + dw_writel(dws, DW_SPI_RX_SAMPLE_DLY, chip->rx_sample_dly); + dws->cur_rx_sample_dly = chip->rx_sample_dly; + } +} +EXPORT_SYMBOL_GPL(dw_spi_update_config); - /* CTRLR0[ 7: 6] Frame Format */ - cr0 |= chip->type << DWC_SSI_CTRLR0_FRF_OFFSET; +static void dw_spi_irq_setup(struct dw_spi *dws) +{ + u16 level; + u8 imask; /* - * SPI mode (SCPOL|SCPH) - * CTRLR0[ 8] Serial Clock Phase - * CTRLR0[ 9] Serial Clock Polarity + * Originally Tx and Rx data lengths match. Rx FIFO Threshold level + * will be adjusted at the final stage of the IRQ-based SPI transfer + * execution so not to lose the leftover of the incoming data. */ - cr0 |= ((spi->mode & SPI_CPOL) ? 1 : 0) << DWC_SSI_CTRLR0_SCPOL_OFFSET; - cr0 |= ((spi->mode & SPI_CPHA) ? 1 : 0) << DWC_SSI_CTRLR0_SCPH_OFFSET; + level = min_t(u16, dws->fifo_len / 2, dws->tx_len); + dw_writel(dws, DW_SPI_TXFTLR, level); + dw_writel(dws, DW_SPI_RXFTLR, level - 1); - /* CTRLR0[11:10] Transfer Mode */ - cr0 |= chip->tmode << DWC_SSI_CTRLR0_TMOD_OFFSET; + imask = SPI_INT_TXEI | SPI_INT_TXOI | SPI_INT_RXUI | SPI_INT_RXOI | + SPI_INT_RXFI; + spi_umask_intr(dws, imask); - /* CTRLR0[13] Shift Register Loop */ - cr0 |= ((spi->mode & SPI_LOOP) ? 1 : 0) << DWC_SSI_CTRLR0_SRL_OFFSET; + dws->transfer_handler = dw_spi_transfer_handler; +} - return cr0; +/* + * The iterative procedure of the poll-based transfer is simple: write as much + * as possible to the Tx FIFO, wait until the pending to receive data is ready + * to be read, read it from the Rx FIFO and check whether the performed + * procedure has been successful. + * + * Note this method the same way as the IRQ-based transfer won't work well for + * the SPI devices connected to the controller with native CS due to the + * automatic CS assertion/de-assertion. + */ +static int dw_spi_poll_transfer(struct dw_spi *dws, + struct spi_transfer *transfer) +{ + struct spi_delay delay; + u16 nbits; + int ret; + + delay.unit = SPI_DELAY_UNIT_SCK; + nbits = dws->n_bytes * BITS_PER_BYTE; + + do { + dw_writer(dws); + + delay.value = nbits * (dws->rx_len - dws->tx_len); + spi_delay_exec(&delay, transfer); + + dw_reader(dws); + + ret = dw_spi_check_status(dws, true); + if (ret) + return ret; + } while (dws->rx_len); + + return 0; } -EXPORT_SYMBOL_GPL(dw_spi_update_cr0_v1_01a); static int dw_spi_transfer_one(struct spi_controller *master, struct spi_device *spi, struct spi_transfer *transfer) { struct dw_spi *dws = spi_controller_get_devdata(master); - struct chip_data *chip = spi_get_ctldata(spi); - unsigned long flags; - u8 imask = 0; - u16 txlevel = 0; - u32 cr0; + struct dw_spi_cfg cfg = { + .tmode = SPI_TMOD_TR, + .dfs = transfer->bits_per_word, + .freq = transfer->speed_hz, + }; int ret; dws->dma_mapped = 0; - spin_lock_irqsave(&dws->buf_lock, flags); + dws->n_bytes = DIV_ROUND_UP(transfer->bits_per_word, BITS_PER_BYTE); dws->tx = (void *)transfer->tx_buf; - dws->tx_end = dws->tx + transfer->len; + dws->tx_len = transfer->len / dws->n_bytes; dws->rx = transfer->rx_buf; - dws->rx_end = dws->rx + transfer->len; - dws->len = transfer->len; - spin_unlock_irqrestore(&dws->buf_lock, flags); + dws->rx_len = dws->tx_len; - /* Ensure dw->rx and dw->rx_end are visible */ + /* Ensure the data above is visible for all CPUs */ smp_mb(); spi_enable_chip(dws, 0); - /* Handle per transfer options for bpw and speed */ - if (transfer->speed_hz != dws->current_freq) { - if (transfer->speed_hz != chip->speed_hz) { - /* clk_div doesn't support odd number */ - chip->clk_div = (DIV_ROUND_UP(dws->max_freq, transfer->speed_hz) + 1) & 0xfffe; - chip->speed_hz = transfer->speed_hz; - } - dws->current_freq = transfer->speed_hz; - spi_set_clk(dws, chip->clk_div); - } - - transfer->effective_speed_hz = dws->max_freq / chip->clk_div; - dws->n_bytes = DIV_ROUND_UP(transfer->bits_per_word, BITS_PER_BYTE); + dw_spi_update_config(dws, spi, &cfg); - cr0 = dws->update_cr0(master, spi, transfer); - dw_writel(dws, DW_SPI_CTRLR0, cr0); + transfer->effective_speed_hz = dws->current_freq; /* Check if current transfer is a DMA transaction */ if (master->can_dma && master->can_dma(master, spi, transfer)) @@ -331,32 +434,20 @@ static int dw_spi_transfer_one(struct spi_controller *master, /* For poll mode just disable all interrupts */ spi_mask_intr(dws, 0xff); - /* - * Interrupt mode - * we only need set the TXEI IRQ, as TX/RX always happen syncronizely - */ if (dws->dma_mapped) { ret = dws->dma_ops->dma_setup(dws, transfer); - if (ret < 0) { - spi_enable_chip(dws, 1); + if (ret) return ret; - } - } else { - txlevel = min_t(u16, dws->fifo_len / 2, dws->len / dws->n_bytes); - dw_writel(dws, DW_SPI_TXFTLR, txlevel); - - /* Set the interrupt mask */ - imask |= SPI_INT_TXEI | SPI_INT_TXOI | - SPI_INT_RXUI | SPI_INT_RXOI; - spi_umask_intr(dws, imask); - - dws->transfer_handler = interrupt_transfer; } spi_enable_chip(dws, 1); if (dws->dma_mapped) return dws->dma_ops->dma_transfer(dws, transfer); + else if (dws->irq == IRQ_NOTCONNECTED) + return dw_spi_poll_transfer(dws, transfer); + + dw_spi_irq_setup(dws); return 1; } @@ -372,21 +463,336 @@ static void dw_spi_handle_err(struct spi_controller *master, spi_reset_chip(dws); } +static int dw_spi_adjust_mem_op_size(struct spi_mem *mem, struct spi_mem_op *op) +{ + if (op->data.dir == SPI_MEM_DATA_IN) + op->data.nbytes = clamp_val(op->data.nbytes, 0, SPI_NDF_MASK + 1); + + return 0; +} + +static bool dw_spi_supports_mem_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + if (op->data.buswidth > 1 || op->addr.buswidth > 1 || + op->dummy.buswidth > 1 || op->cmd.buswidth > 1) + return false; + + return spi_mem_default_supports_op(mem, op); +} + +static int dw_spi_init_mem_buf(struct dw_spi *dws, const struct spi_mem_op *op) +{ + unsigned int i, j, len; + u8 *out; + + /* + * Calculate the total length of the EEPROM command transfer and + * either use the pre-allocated buffer or create a temporary one. + */ + len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes; + if (op->data.dir == SPI_MEM_DATA_OUT) + len += op->data.nbytes; + + if (len <= SPI_BUF_SIZE) { + out = dws->buf; + } else { + out = kzalloc(len, GFP_KERNEL); + if (!out) + return -ENOMEM; + } + + /* + * Collect the operation code, address and dummy bytes into the single + * buffer. If it's a transfer with data to be sent, also copy it into the + * single buffer in order to speed the data transmission up. + */ + for (i = 0; i < op->cmd.nbytes; ++i) + out[i] = SPI_GET_BYTE(op->cmd.opcode, op->cmd.nbytes - i - 1); + for (j = 0; j < op->addr.nbytes; ++i, ++j) + out[i] = SPI_GET_BYTE(op->addr.val, op->addr.nbytes - j - 1); + for (j = 0; j < op->dummy.nbytes; ++i, ++j) + out[i] = 0x0; + + if (op->data.dir == SPI_MEM_DATA_OUT) + memcpy(&out[i], op->data.buf.out, op->data.nbytes); + + dws->n_bytes = 1; + dws->tx = out; + dws->tx_len = len; + if (op->data.dir == SPI_MEM_DATA_IN) { + dws->rx = op->data.buf.in; + dws->rx_len = op->data.nbytes; + } else { + dws->rx = NULL; + dws->rx_len = 0; + } + + return 0; +} + +static void dw_spi_free_mem_buf(struct dw_spi *dws) +{ + if (dws->tx != dws->buf) + kfree(dws->tx); +} + +static int dw_spi_write_then_read(struct dw_spi *dws, struct spi_device *spi) +{ + u32 room, entries, sts; + unsigned int len; + u8 *buf; + + /* + * At initial stage we just pre-fill the Tx FIFO in with no rush, + * since native CS hasn't been enabled yet and the automatic data + * transmission won't start til we do that. + */ + len = min(dws->fifo_len, dws->tx_len); + buf = dws->tx; + while (len--) + dw_write_io_reg(dws, DW_SPI_DR, *buf++); + + /* + * After setting any bit in the SER register the transmission will + * start automatically. We have to keep up with that procedure + * otherwise the CS de-assertion will happen whereupon the memory + * operation will be pre-terminated. + */ + len = dws->tx_len - ((void *)buf - dws->tx); + dw_spi_set_cs(spi, false); + while (len) { + entries = readl_relaxed(dws->regs + DW_SPI_TXFLR); + if (!entries) { + dev_err(&dws->master->dev, "CS de-assertion on Tx\n"); + return -EIO; + } + room = min(dws->fifo_len - entries, len); + for (; room; --room, --len) + dw_write_io_reg(dws, DW_SPI_DR, *buf++); + } + + /* + * Data fetching will start automatically if the EEPROM-read mode is + * activated. We have to keep up with the incoming data pace to + * prevent the Rx FIFO overflow causing the inbound data loss. + */ + len = dws->rx_len; + buf = dws->rx; + while (len) { + entries = readl_relaxed(dws->regs + DW_SPI_RXFLR); + if (!entries) { + sts = readl_relaxed(dws->regs + DW_SPI_RISR); + if (sts & SPI_INT_RXOI) { + dev_err(&dws->master->dev, "FIFO overflow on Rx\n"); + return -EIO; + } + continue; + } + entries = min(entries, len); + for (; entries; --entries, --len) + *buf++ = dw_read_io_reg(dws, DW_SPI_DR); + } + + return 0; +} + +static inline bool dw_spi_ctlr_busy(struct dw_spi *dws) +{ + return dw_readl(dws, DW_SPI_SR) & SR_BUSY; +} + +static int dw_spi_wait_mem_op_done(struct dw_spi *dws) +{ + int retry = SPI_WAIT_RETRIES; + struct spi_delay delay; + unsigned long ns, us; + u32 nents; + + nents = dw_readl(dws, DW_SPI_TXFLR); + ns = NSEC_PER_SEC / dws->current_freq * nents; + ns *= dws->n_bytes * BITS_PER_BYTE; + if (ns <= NSEC_PER_USEC) { + delay.unit = SPI_DELAY_UNIT_NSECS; + delay.value = ns; + } else { + us = DIV_ROUND_UP(ns, NSEC_PER_USEC); + delay.unit = SPI_DELAY_UNIT_USECS; + delay.value = clamp_val(us, 0, USHRT_MAX); + } + + while (dw_spi_ctlr_busy(dws) && retry--) + spi_delay_exec(&delay, NULL); + + if (retry < 0) { + dev_err(&dws->master->dev, "Mem op hanged up\n"); + return -EIO; + } + + return 0; +} + +static void dw_spi_stop_mem_op(struct dw_spi *dws, struct spi_device *spi) +{ + spi_enable_chip(dws, 0); + dw_spi_set_cs(spi, true); + spi_enable_chip(dws, 1); +} + +/* + * The SPI memory operation implementation below is the best choice for the + * devices, which are selected by the native chip-select lane. It's + * specifically developed to workaround the problem with automatic chip-select + * lane toggle when there is no data in the Tx FIFO buffer. Luckily the current + * SPI-mem core calls exec_op() callback only if the GPIO-based CS is + * unavailable. + */ +static int dw_spi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op) +{ + struct dw_spi *dws = spi_controller_get_devdata(mem->spi->controller); + struct dw_spi_cfg cfg; + unsigned long flags; + int ret; + + /* + * Collect the outbound data into a single buffer to speed the + * transmission up at least on the initial stage. + */ + ret = dw_spi_init_mem_buf(dws, op); + if (ret) + return ret; + + /* + * DW SPI EEPROM-read mode is required only for the SPI memory Data-IN + * operation. Transmit-only mode is suitable for the rest of them. + */ + cfg.dfs = 8; + cfg.freq = clamp(mem->spi->max_speed_hz, 0U, dws->max_mem_freq); + if (op->data.dir == SPI_MEM_DATA_IN) { + cfg.tmode = SPI_TMOD_EPROMREAD; + cfg.ndf = op->data.nbytes; + } else { + cfg.tmode = SPI_TMOD_TO; + } + + spi_enable_chip(dws, 0); + + dw_spi_update_config(dws, mem->spi, &cfg); + + spi_mask_intr(dws, 0xff); + + spi_enable_chip(dws, 1); + + /* + * DW APB SSI controller has very nasty peculiarities. First originally + * (without any vendor-specific modifications) it doesn't provide a + * direct way to set and clear the native chip-select signal. Instead + * the controller asserts the CS lane if Tx FIFO isn't empty and a + * transmission is going on, and automatically de-asserts it back to + * the high level if the Tx FIFO doesn't have anything to be pushed + * out. Due to that a multi-tasking or heavy IRQs activity might be + * fatal, since the transfer procedure preemption may cause the Tx FIFO + * getting empty and sudden CS de-assertion, which in the middle of the + * transfer will most likely cause the data loss. Secondly the + * EEPROM-read or Read-only DW SPI transfer modes imply the incoming + * data being automatically pulled in into the Rx FIFO. So if the + * driver software is late in fetching the data from the FIFO before + * it's overflown, new incoming data will be lost. In order to make + * sure the executed memory operations are CS-atomic and to prevent the + * Rx FIFO overflow we have to disable the local interrupts so to block + * any preemption during the subsequent IO operations. + * + * Note. At some circumstances disabling IRQs may not help to prevent + * the problems described above. The CS de-assertion and Rx FIFO + * overflow may still happen due to the relatively slow system bus or + * CPU not working fast enough, so the write-then-read algo implemented + * here just won't keep up with the SPI bus data transfer. Such + * situation is highly platform specific and is supposed to be fixed by + * manually restricting the SPI bus frequency using the + * dws->max_mem_freq parameter. + */ + local_irq_save(flags); + preempt_disable(); + + ret = dw_spi_write_then_read(dws, mem->spi); + + local_irq_restore(flags); + preempt_enable(); + + /* + * Wait for the operation being finished and check the controller + * status only if there hasn't been any run-time error detected. In the + * former case it's just pointless. In the later one to prevent an + * additional error message printing since any hw error flag being set + * would be due to an error detected on the data transfer. + */ + if (!ret) { + ret = dw_spi_wait_mem_op_done(dws); + if (!ret) + ret = dw_spi_check_status(dws, true); + } + + dw_spi_stop_mem_op(dws, mem->spi); + + dw_spi_free_mem_buf(dws); + + return ret; +} + +/* + * Initialize the default memory operations if a glue layer hasn't specified + * custom ones. Direct mapping operations will be preserved anyway since DW SPI + * controller doesn't have an embedded dirmap interface. Note the memory + * operations implemented in this driver is the best choice only for the DW APB + * SSI controller with standard native CS functionality. If a hardware vendor + * has fixed the automatic CS assertion/de-assertion peculiarity, then it will + * be safer to use the normal SPI-messages-based transfers implementation. + */ +static void dw_spi_init_mem_ops(struct dw_spi *dws) +{ + if (!dws->mem_ops.exec_op && !(dws->caps & DW_SPI_CAP_CS_OVERRIDE) && + !dws->set_cs) { + dws->mem_ops.adjust_op_size = dw_spi_adjust_mem_op_size; + dws->mem_ops.supports_op = dw_spi_supports_mem_op; + dws->mem_ops.exec_op = dw_spi_exec_mem_op; + if (!dws->max_mem_freq) + dws->max_mem_freq = dws->max_freq; + } +} + /* This may be called twice for each spi dev */ static int dw_spi_setup(struct spi_device *spi) { + struct dw_spi *dws = spi_controller_get_devdata(spi->controller); struct chip_data *chip; /* Only alloc on first setup */ chip = spi_get_ctldata(spi); if (!chip) { + struct dw_spi *dws = spi_controller_get_devdata(spi->controller); + u32 rx_sample_dly_ns; + chip = kzalloc(sizeof(struct chip_data), GFP_KERNEL); if (!chip) return -ENOMEM; spi_set_ctldata(spi, chip); + /* Get specific / default rx-sample-delay */ + if (device_property_read_u32(&spi->dev, + "rx-sample-delay-ns", + &rx_sample_dly_ns) != 0) + /* Use default controller value */ + rx_sample_dly_ns = dws->def_rx_sample_dly_ns; + chip->rx_sample_dly = DIV_ROUND_CLOSEST(rx_sample_dly_ns, + NSEC_PER_SEC / + dws->max_freq); } - chip->tmode = SPI_TMOD_TR; + /* + * Update CR0 data each time the setup callback is invoked since + * the device parameters could have been changed, for instance, by + * the MMC SPI driver or something else. + */ + chip->cr0 = dw_spi_prepare_cr0(dws, spi); return 0; } @@ -423,7 +829,7 @@ static void spi_hw_init(struct device *dev, struct dw_spi *dws) } /* enable HW fixup for explicit CS deselect for Amazon's alpine chip */ - if (dws->cs_override) + if (dws->caps & DW_SPI_CAP_CS_OVERRIDE) dw_writel(dws, DW_SPI_CS_OVERRIDE, 0xF); } @@ -440,19 +846,22 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws) return -ENOMEM; dws->master = master; - dws->type = SSI_MOTO_SPI; dws->dma_addr = (dma_addr_t)(dws->paddr + DW_SPI_DR); - spin_lock_init(&dws->buf_lock); spi_controller_set_devdata(master, dws); + /* Basic HW init */ + spi_hw_init(dev, dws); + ret = request_irq(dws->irq, dw_spi_irq, IRQF_SHARED, dev_name(dev), master); - if (ret < 0) { + if (ret < 0 && ret != -ENOTCONN) { dev_err(dev, "can not get IRQ\n"); goto err_free_master; } + dw_spi_init_mem_ops(dws); + master->use_gpio_descriptors = true; master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP; master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16); @@ -460,20 +869,22 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws) master->num_chipselect = dws->num_cs; master->setup = dw_spi_setup; master->cleanup = dw_spi_cleanup; - master->set_cs = dw_spi_set_cs; + if (dws->set_cs) + master->set_cs = dws->set_cs; + else + master->set_cs = dw_spi_set_cs; master->transfer_one = dw_spi_transfer_one; master->handle_err = dw_spi_handle_err; + master->mem_ops = &dws->mem_ops; master->max_speed_hz = dws->max_freq; master->dev.of_node = dev->of_node; master->dev.fwnode = dev->fwnode; master->flags = SPI_MASTER_GPIO_SS; master->auto_runtime_pm = true; - if (dws->set_cs) - master->set_cs = dws->set_cs; - - /* Basic HW init */ - spi_hw_init(dev, dws); + /* Get default rx sample delay */ + device_property_read_u32(dev, "rx-sample-delay-ns", + &dws->def_rx_sample_dly_ns); if (dws->dma_ops && dws->dma_ops->dma_init) { ret = dws->dma_ops->dma_init(dev, dws); diff --git a/drivers/spi/spi-dw-dma.c b/drivers/spi/spi-dw-dma.c index bb390ff67d1d..a09831c62192 100644 --- a/drivers/spi/spi-dw-dma.c +++ b/drivers/spi/spi-dw-dma.c @@ -17,7 +17,6 @@ #include "spi-dw.h" -#define WAIT_RETRIES 5 #define RX_BUSY 0 #define RX_BURST_LEVEL 16 #define TX_BUSY 1 @@ -49,6 +48,7 @@ static void dw_spi_dma_maxburst_init(struct dw_spi *dws) max_burst = RX_BURST_LEVEL; dws->rxburst = min(max_burst, def_burst); + dw_writel(dws, DW_SPI_DMARDLR, dws->rxburst - 1); ret = dma_get_slave_caps(dws->txchan, &caps); if (!ret && caps.max_burst) @@ -56,7 +56,36 @@ static void dw_spi_dma_maxburst_init(struct dw_spi *dws) else max_burst = TX_BURST_LEVEL; + /* + * Having a Rx DMA channel serviced with higher priority than a Tx DMA + * channel might not be enough to provide a well balanced DMA-based + * SPI transfer interface. There might still be moments when the Tx DMA + * channel is occasionally handled faster than the Rx DMA channel. + * That in its turn will eventually cause the SPI Rx FIFO overflow if + * SPI bus speed is high enough to fill the SPI Rx FIFO in before it's + * cleared by the Rx DMA channel. In order to fix the problem the Tx + * DMA activity is intentionally slowed down by limiting the SPI Tx + * FIFO depth with a value twice bigger than the Tx burst length. + */ dws->txburst = min(max_burst, def_burst); + dw_writel(dws, DW_SPI_DMATDLR, dws->txburst); +} + +static void dw_spi_dma_sg_burst_init(struct dw_spi *dws) +{ + struct dma_slave_caps tx = {0}, rx = {0}; + + dma_get_slave_caps(dws->txchan, &tx); + dma_get_slave_caps(dws->rxchan, &rx); + + if (tx.max_sg_burst > 0 && rx.max_sg_burst > 0) + dws->dma_sg_burst = min(tx.max_sg_burst, rx.max_sg_burst); + else if (tx.max_sg_burst > 0) + dws->dma_sg_burst = tx.max_sg_burst; + else if (rx.max_sg_burst > 0) + dws->dma_sg_burst = rx.max_sg_burst; + else + dws->dma_sg_burst = 0; } static int dw_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws) @@ -96,6 +125,8 @@ static int dw_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws) dw_spi_dma_maxburst_init(dws); + dw_spi_dma_sg_burst_init(dws); + return 0; free_rxchan: @@ -125,6 +156,8 @@ static int dw_spi_dma_init_generic(struct device *dev, struct dw_spi *dws) dw_spi_dma_maxburst_init(dws); + dw_spi_dma_sg_burst_init(dws); + return 0; } @@ -139,23 +172,14 @@ static void dw_spi_dma_exit(struct dw_spi *dws) dmaengine_terminate_sync(dws->rxchan); dma_release_channel(dws->rxchan); } - - dw_writel(dws, DW_SPI_DMACR, 0); } static irqreturn_t dw_spi_dma_transfer_handler(struct dw_spi *dws) { - u16 irq_status = dw_readl(dws, DW_SPI_ISR); - - if (!irq_status) - return IRQ_NONE; - - dw_readl(dws, DW_SPI_ICR); - spi_reset_chip(dws); + dw_spi_check_status(dws, false); - dev_err(&dws->master->dev, "%s: FIFO overrun/underrun\n", __func__); - dws->master->cur_msg->status = -EIO; complete(&dws->dma_completion); + return IRQ_HANDLED; } @@ -177,12 +201,12 @@ static enum dma_slave_buswidth dw_spi_dma_convert_width(u8 n_bytes) return DMA_SLAVE_BUSWIDTH_UNDEFINED; } -static int dw_spi_dma_wait(struct dw_spi *dws, struct spi_transfer *xfer) +static int dw_spi_dma_wait(struct dw_spi *dws, unsigned int len, u32 speed) { unsigned long long ms; - ms = xfer->len * MSEC_PER_SEC * BITS_PER_BYTE; - do_div(ms, xfer->effective_speed_hz); + ms = len * MSEC_PER_SEC * BITS_PER_BYTE; + do_div(ms, speed); ms += ms + 200; if (ms > UINT_MAX) @@ -208,7 +232,7 @@ static inline bool dw_spi_dma_tx_busy(struct dw_spi *dws) static int dw_spi_dma_wait_tx_done(struct dw_spi *dws, struct spi_transfer *xfer) { - int retry = WAIT_RETRIES; + int retry = SPI_WAIT_RETRIES; struct spi_delay delay; u32 nents; @@ -239,18 +263,12 @@ static void dw_spi_dma_tx_done(void *arg) if (test_bit(RX_BUSY, &dws->dma_chan_busy)) return; - dw_writel(dws, DW_SPI_DMACR, 0); complete(&dws->dma_completion); } -static struct dma_async_tx_descriptor * -dw_spi_dma_prepare_tx(struct dw_spi *dws, struct spi_transfer *xfer) +static int dw_spi_dma_config_tx(struct dw_spi *dws) { struct dma_slave_config txconf; - struct dma_async_tx_descriptor *txdesc; - - if (!xfer->tx_buf) - return NULL; memset(&txconf, 0, sizeof(txconf)); txconf.direction = DMA_MEM_TO_DEV; @@ -260,20 +278,35 @@ dw_spi_dma_prepare_tx(struct dw_spi *dws, struct spi_transfer *xfer) txconf.dst_addr_width = dw_spi_dma_convert_width(dws->n_bytes); txconf.device_fc = false; - dmaengine_slave_config(dws->txchan, &txconf); + return dmaengine_slave_config(dws->txchan, &txconf); +} - txdesc = dmaengine_prep_slave_sg(dws->txchan, - xfer->tx_sg.sgl, - xfer->tx_sg.nents, - DMA_MEM_TO_DEV, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); +static int dw_spi_dma_submit_tx(struct dw_spi *dws, struct scatterlist *sgl, + unsigned int nents) +{ + struct dma_async_tx_descriptor *txdesc; + dma_cookie_t cookie; + int ret; + + txdesc = dmaengine_prep_slave_sg(dws->txchan, sgl, nents, + DMA_MEM_TO_DEV, + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!txdesc) - return NULL; + return -ENOMEM; txdesc->callback = dw_spi_dma_tx_done; txdesc->callback_param = dws; - return txdesc; + cookie = dmaengine_submit(txdesc); + ret = dma_submit_error(cookie); + if (ret) { + dmaengine_terminate_sync(dws->txchan); + return ret; + } + + set_bit(TX_BUSY, &dws->dma_chan_busy); + + return 0; } static inline bool dw_spi_dma_rx_busy(struct dw_spi *dws) @@ -283,7 +316,7 @@ static inline bool dw_spi_dma_rx_busy(struct dw_spi *dws) static int dw_spi_dma_wait_rx_done(struct dw_spi *dws) { - int retry = WAIT_RETRIES; + int retry = SPI_WAIT_RETRIES; struct spi_delay delay; unsigned long ns, us; u32 nents; @@ -331,18 +364,12 @@ static void dw_spi_dma_rx_done(void *arg) if (test_bit(TX_BUSY, &dws->dma_chan_busy)) return; - dw_writel(dws, DW_SPI_DMACR, 0); complete(&dws->dma_completion); } -static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws, - struct spi_transfer *xfer) +static int dw_spi_dma_config_rx(struct dw_spi *dws) { struct dma_slave_config rxconf; - struct dma_async_tx_descriptor *rxdesc; - - if (!xfer->rx_buf) - return NULL; memset(&rxconf, 0, sizeof(rxconf)); rxconf.direction = DMA_DEV_TO_MEM; @@ -352,50 +379,64 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws, rxconf.src_addr_width = dw_spi_dma_convert_width(dws->n_bytes); rxconf.device_fc = false; - dmaengine_slave_config(dws->rxchan, &rxconf); + return dmaengine_slave_config(dws->rxchan, &rxconf); +} + +static int dw_spi_dma_submit_rx(struct dw_spi *dws, struct scatterlist *sgl, + unsigned int nents) +{ + struct dma_async_tx_descriptor *rxdesc; + dma_cookie_t cookie; + int ret; - rxdesc = dmaengine_prep_slave_sg(dws->rxchan, - xfer->rx_sg.sgl, - xfer->rx_sg.nents, - DMA_DEV_TO_MEM, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + rxdesc = dmaengine_prep_slave_sg(dws->rxchan, sgl, nents, + DMA_DEV_TO_MEM, + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!rxdesc) - return NULL; + return -ENOMEM; rxdesc->callback = dw_spi_dma_rx_done; rxdesc->callback_param = dws; - return rxdesc; + cookie = dmaengine_submit(rxdesc); + ret = dma_submit_error(cookie); + if (ret) { + dmaengine_terminate_sync(dws->rxchan); + return ret; + } + + set_bit(RX_BUSY, &dws->dma_chan_busy); + + return 0; } static int dw_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer) { - u16 imr = 0, dma_ctrl = 0; + u16 imr, dma_ctrl; + int ret; - /* - * Having a Rx DMA channel serviced with higher priority than a Tx DMA - * channel might not be enough to provide a well balanced DMA-based - * SPI transfer interface. There might still be moments when the Tx DMA - * channel is occasionally handled faster than the Rx DMA channel. - * That in its turn will eventually cause the SPI Rx FIFO overflow if - * SPI bus speed is high enough to fill the SPI Rx FIFO in before it's - * cleared by the Rx DMA channel. In order to fix the problem the Tx - * DMA activity is intentionally slowed down by limiting the SPI Tx - * FIFO depth with a value twice bigger than the Tx burst length - * calculated earlier by the dw_spi_dma_maxburst_init() method. - */ - dw_writel(dws, DW_SPI_DMARDLR, dws->rxburst - 1); - dw_writel(dws, DW_SPI_DMATDLR, dws->txburst); + if (!xfer->tx_buf) + return -EINVAL; + + /* Setup DMA channels */ + ret = dw_spi_dma_config_tx(dws); + if (ret) + return ret; - if (xfer->tx_buf) - dma_ctrl |= SPI_DMA_TDMAE; + if (xfer->rx_buf) { + ret = dw_spi_dma_config_rx(dws); + if (ret) + return ret; + } + + /* Set the DMA handshaking interface */ + dma_ctrl = SPI_DMA_TDMAE; if (xfer->rx_buf) dma_ctrl |= SPI_DMA_RDMAE; dw_writel(dws, DW_SPI_DMACR, dma_ctrl); /* Set the interrupt mask */ - if (xfer->tx_buf) - imr |= SPI_INT_TXOI; + imr = SPI_INT_TXOI; if (xfer->rx_buf) imr |= SPI_INT_RXUI | SPI_INT_RXOI; spi_umask_intr(dws, imr); @@ -407,41 +448,166 @@ static int dw_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer) return 0; } -static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer) +static int dw_spi_dma_transfer_all(struct dw_spi *dws, + struct spi_transfer *xfer) { - struct dma_async_tx_descriptor *txdesc, *rxdesc; int ret; - /* Prepare the TX dma transfer */ - txdesc = dw_spi_dma_prepare_tx(dws, xfer); + /* Submit the DMA Tx transfer */ + ret = dw_spi_dma_submit_tx(dws, xfer->tx_sg.sgl, xfer->tx_sg.nents); + if (ret) + goto err_clear_dmac; - /* Prepare the RX dma transfer */ - rxdesc = dw_spi_dma_prepare_rx(dws, xfer); + /* Submit the DMA Rx transfer if required */ + if (xfer->rx_buf) { + ret = dw_spi_dma_submit_rx(dws, xfer->rx_sg.sgl, + xfer->rx_sg.nents); + if (ret) + goto err_clear_dmac; - /* rx must be started before tx due to spi instinct */ - if (rxdesc) { - set_bit(RX_BUSY, &dws->dma_chan_busy); - dmaengine_submit(rxdesc); + /* rx must be started before tx due to spi instinct */ dma_async_issue_pending(dws->rxchan); } - if (txdesc) { - set_bit(TX_BUSY, &dws->dma_chan_busy); - dmaengine_submit(txdesc); + dma_async_issue_pending(dws->txchan); + + ret = dw_spi_dma_wait(dws, xfer->len, xfer->effective_speed_hz); + +err_clear_dmac: + dw_writel(dws, DW_SPI_DMACR, 0); + + return ret; +} + +/* + * In case if at least one of the requested DMA channels doesn't support the + * hardware accelerated SG list entries traverse, the DMA driver will most + * likely work that around by performing the IRQ-based SG list entries + * resubmission. That might and will cause a problem if the DMA Tx channel is + * recharged and re-executed before the Rx DMA channel. Due to + * non-deterministic IRQ-handler execution latency the DMA Tx channel will + * start pushing data to the SPI bus before the Rx DMA channel is even + * reinitialized with the next inbound SG list entry. By doing so the DMA Tx + * channel will implicitly start filling the DW APB SSI Rx FIFO up, which while + * the DMA Rx channel being recharged and re-executed will eventually be + * overflown. + * + * In order to solve the problem we have to feed the DMA engine with SG list + * entries one-by-one. It shall keep the DW APB SSI Tx and Rx FIFOs + * synchronized and prevent the Rx FIFO overflow. Since in general the tx_sg + * and rx_sg lists may have different number of entries of different lengths + * (though total length should match) let's virtually split the SG-lists to the + * set of DMA transfers, which length is a minimum of the ordered SG-entries + * lengths. An ASCII-sketch of the implemented algo is following: + * xfer->len + * |___________| + * tx_sg list: |___|____|__| + * rx_sg list: |_|____|____| + * DMA transfers: |_|_|__|_|__| + * + * Note in order to have this workaround solving the denoted problem the DMA + * engine driver should properly initialize the max_sg_burst capability and set + * the DMA device max segment size parameter with maximum data block size the + * DMA engine supports. + */ + +static int dw_spi_dma_transfer_one(struct dw_spi *dws, + struct spi_transfer *xfer) +{ + struct scatterlist *tx_sg = NULL, *rx_sg = NULL, tx_tmp, rx_tmp; + unsigned int tx_len = 0, rx_len = 0; + unsigned int base, len; + int ret; + + sg_init_table(&tx_tmp, 1); + sg_init_table(&rx_tmp, 1); + + for (base = 0, len = 0; base < xfer->len; base += len) { + /* Fetch next Tx DMA data chunk */ + if (!tx_len) { + tx_sg = !tx_sg ? &xfer->tx_sg.sgl[0] : sg_next(tx_sg); + sg_dma_address(&tx_tmp) = sg_dma_address(tx_sg); + tx_len = sg_dma_len(tx_sg); + } + + /* Fetch next Rx DMA data chunk */ + if (!rx_len) { + rx_sg = !rx_sg ? &xfer->rx_sg.sgl[0] : sg_next(rx_sg); + sg_dma_address(&rx_tmp) = sg_dma_address(rx_sg); + rx_len = sg_dma_len(rx_sg); + } + + len = min(tx_len, rx_len); + + sg_dma_len(&tx_tmp) = len; + sg_dma_len(&rx_tmp) = len; + + /* Submit DMA Tx transfer */ + ret = dw_spi_dma_submit_tx(dws, &tx_tmp, 1); + if (ret) + break; + + /* Submit DMA Rx transfer */ + ret = dw_spi_dma_submit_rx(dws, &rx_tmp, 1); + if (ret) + break; + + /* Rx must be started before Tx due to SPI instinct */ + dma_async_issue_pending(dws->rxchan); + dma_async_issue_pending(dws->txchan); + + /* + * Here we only need to wait for the DMA transfer to be + * finished since SPI controller is kept enabled during the + * procedure this loop implements and there is no risk to lose + * data left in the Tx/Rx FIFOs. + */ + ret = dw_spi_dma_wait(dws, len, xfer->effective_speed_hz); + if (ret) + break; + + reinit_completion(&dws->dma_completion); + + sg_dma_address(&tx_tmp) += len; + sg_dma_address(&rx_tmp) += len; + tx_len -= len; + rx_len -= len; } - ret = dw_spi_dma_wait(dws, xfer); + dw_writel(dws, DW_SPI_DMACR, 0); + + return ret; +} + +static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer) +{ + unsigned int nents; + int ret; + + nents = max(xfer->tx_sg.nents, xfer->rx_sg.nents); + + /* + * Execute normal DMA-based transfer (which submits the Rx and Tx SG + * lists directly to the DMA engine at once) if either full hardware + * accelerated SG list traverse is supported by both channels, or the + * Tx-only SPI transfer is requested, or the DMA engine is capable to + * handle both SG lists on hardware accelerated basis. + */ + if (!dws->dma_sg_burst || !xfer->rx_buf || nents <= dws->dma_sg_burst) + ret = dw_spi_dma_transfer_all(dws, xfer); + else + ret = dw_spi_dma_transfer_one(dws, xfer); if (ret) return ret; - if (txdesc && dws->master->cur_msg->status == -EINPROGRESS) { + if (dws->master->cur_msg->status == -EINPROGRESS) { ret = dw_spi_dma_wait_tx_done(dws, xfer); if (ret) return ret; } - if (rxdesc && dws->master->cur_msg->status == -EINPROGRESS) + if (xfer->rx_buf && dws->master->cur_msg->status == -EINPROGRESS) ret = dw_spi_dma_wait_rx_done(dws); return ret; @@ -457,8 +623,6 @@ static void dw_spi_dma_stop(struct dw_spi *dws) dmaengine_terminate_sync(dws->rxchan); clear_bit(RX_BUSY, &dws->dma_chan_busy); } - - dw_writel(dws, DW_SPI_DMACR, 0); } static const struct dw_spi_dma_ops dw_spi_dma_mfld_ops = { diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c index 403403deae66..d0cc5bf4fa4e 100644 --- a/drivers/spi/spi-dw-mmio.c +++ b/drivers/spi/spi-dw-mmio.c @@ -45,16 +45,12 @@ struct dw_spi_mmio { #define MSCC_SPI_MST_SW_MODE_SW_PIN_CTRL_MODE BIT(13) #define MSCC_SPI_MST_SW_MODE_SW_SPI_CS(x) (x << 5) -/* - * For Keem Bay, CTRLR0[31] is used to select controller mode. - * 0: SSI is slave - * 1: SSI is master - */ -#define KEEMBAY_CTRLR0_SSIC_IS_MST BIT(31) +#define SPARX5_FORCE_ENA 0xa4 +#define SPARX5_FORCE_VAL 0xa8 struct dw_spi_mscc { struct regmap *syscon; - void __iomem *spi_mst; + void __iomem *spi_mst; /* Not sparx5 */ }; /* @@ -114,9 +110,6 @@ static int dw_spi_mscc_init(struct platform_device *pdev, dwsmmio->dws.set_cs = dw_spi_mscc_set_cs; dwsmmio->priv = dwsmscc; - /* Register hook to configure CTRLR0 */ - dwsmmio->dws.update_cr0 = dw_spi_update_cr0; - return 0; } @@ -134,13 +127,71 @@ static int dw_spi_mscc_jaguar2_init(struct platform_device *pdev, JAGUAR2_IF_SI_OWNER_OFFSET); } +/* + * The Designware SPI controller (referred to as master in the + * documentation) automatically deasserts chip select when the tx fifo + * is empty. The chip selects then needs to be driven by a CS override + * register. enable is an active low signal. + */ +static void dw_spi_sparx5_set_cs(struct spi_device *spi, bool enable) +{ + struct dw_spi *dws = spi_master_get_devdata(spi->master); + struct dw_spi_mmio *dwsmmio = container_of(dws, struct dw_spi_mmio, dws); + struct dw_spi_mscc *dwsmscc = dwsmmio->priv; + u8 cs = spi->chip_select; + + if (!enable) { + /* CS override drive enable */ + regmap_write(dwsmscc->syscon, SPARX5_FORCE_ENA, 1); + /* Now set CSx enabled */ + regmap_write(dwsmscc->syscon, SPARX5_FORCE_VAL, ~BIT(cs)); + /* Allow settle */ + usleep_range(1, 5); + } else { + /* CS value */ + regmap_write(dwsmscc->syscon, SPARX5_FORCE_VAL, ~0); + /* Allow settle */ + usleep_range(1, 5); + /* CS override drive disable */ + regmap_write(dwsmscc->syscon, SPARX5_FORCE_ENA, 0); + } + + dw_spi_set_cs(spi, enable); +} + +static int dw_spi_mscc_sparx5_init(struct platform_device *pdev, + struct dw_spi_mmio *dwsmmio) +{ + const char *syscon_name = "microchip,sparx5-cpu-syscon"; + struct device *dev = &pdev->dev; + struct dw_spi_mscc *dwsmscc; + + if (!IS_ENABLED(CONFIG_SPI_MUX)) { + dev_err(dev, "This driver needs CONFIG_SPI_MUX\n"); + return -EOPNOTSUPP; + } + + dwsmscc = devm_kzalloc(dev, sizeof(*dwsmscc), GFP_KERNEL); + if (!dwsmscc) + return -ENOMEM; + + dwsmscc->syscon = + syscon_regmap_lookup_by_compatible(syscon_name); + if (IS_ERR(dwsmscc->syscon)) { + dev_err(dev, "No syscon map %s\n", syscon_name); + return PTR_ERR(dwsmscc->syscon); + } + + dwsmmio->dws.set_cs = dw_spi_sparx5_set_cs; + dwsmmio->priv = dwsmscc; + + return 0; +} + static int dw_spi_alpine_init(struct platform_device *pdev, struct dw_spi_mmio *dwsmmio) { - dwsmmio->dws.cs_override = 1; - - /* Register hook to configure CTRLR0 */ - dwsmmio->dws.update_cr0 = dw_spi_update_cr0; + dwsmmio->dws.caps = DW_SPI_CAP_CS_OVERRIDE; return 0; } @@ -148,9 +199,6 @@ static int dw_spi_alpine_init(struct platform_device *pdev, static int dw_spi_dw_apb_init(struct platform_device *pdev, struct dw_spi_mmio *dwsmmio) { - /* Register hook to configure CTRLR0 */ - dwsmmio->dws.update_cr0 = dw_spi_update_cr0; - dw_spi_dma_setup_generic(&dwsmmio->dws); return 0; @@ -159,28 +207,17 @@ static int dw_spi_dw_apb_init(struct platform_device *pdev, static int dw_spi_dwc_ssi_init(struct platform_device *pdev, struct dw_spi_mmio *dwsmmio) { - /* Register hook to configure CTRLR0 */ - dwsmmio->dws.update_cr0 = dw_spi_update_cr0_v1_01a; + dwsmmio->dws.caps = DW_SPI_CAP_DWC_SSI; dw_spi_dma_setup_generic(&dwsmmio->dws); return 0; } -static u32 dw_spi_update_cr0_keembay(struct spi_controller *master, - struct spi_device *spi, - struct spi_transfer *transfer) -{ - u32 cr0 = dw_spi_update_cr0_v1_01a(master, spi, transfer); - - return cr0 | KEEMBAY_CTRLR0_SSIC_IS_MST; -} - static int dw_spi_keembay_init(struct platform_device *pdev, struct dw_spi_mmio *dwsmmio) { - /* Register hook to configure CTRLR0 */ - dwsmmio->dws.update_cr0 = dw_spi_update_cr0_keembay; + dwsmmio->dws.caps = DW_SPI_CAP_KEEMBAY_MST | DW_SPI_CAP_DWC_SSI; return 0; } @@ -297,6 +334,7 @@ static const struct of_device_id dw_spi_mmio_of_match[] = { { .compatible = "renesas,rzn1-spi", .data = dw_spi_dw_apb_init}, { .compatible = "snps,dwc-ssi-1.01a", .data = dw_spi_dwc_ssi_init}, { .compatible = "intel,keembay-ssi", .data = dw_spi_keembay_init}, + { .compatible = "microchip,sparx5-spi", dw_spi_mscc_sparx5_init}, { /* end of table */} }; MODULE_DEVICE_TABLE(of, dw_spi_mmio_of_match); diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c index 2ea73809ca34..8a91cd58102f 100644 --- a/drivers/spi/spi-dw-pci.c +++ b/drivers/spi/spi-dw-pci.c @@ -48,9 +48,6 @@ static int spi_mid_init(struct dw_spi *dws) iounmap(clk_reg); - /* Register hook to configure CTRLR0 */ - dws->update_cr0 = dw_spi_update_cr0; - dw_spi_dma_setup_mfld(dws); return 0; @@ -58,9 +55,6 @@ static int spi_mid_init(struct dw_spi *dws) static int spi_generic_init(struct dw_spi *dws) { - /* Register hook to configure CTRLR0 */ - dws->update_cr0 = dw_spi_update_cr0; - dw_spi_dma_setup_generic(dws); return 0; @@ -127,18 +121,16 @@ static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (desc->setup) { ret = desc->setup(dws); if (ret) - return ret; + goto err_free_irq_vectors; } } else { - pci_free_irq_vectors(pdev); - return -ENODEV; + ret = -ENODEV; + goto err_free_irq_vectors; } ret = dw_spi_add_host(&pdev->dev, dws); - if (ret) { - pci_free_irq_vectors(pdev); - return ret; - } + if (ret) + goto err_free_irq_vectors; /* PCI hook and SPI hook use the same drv data */ pci_set_drvdata(pdev, dws); @@ -152,6 +144,10 @@ static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) pm_runtime_allow(&pdev->dev); return 0; + +err_free_irq_vectors: + pci_free_irq_vectors(pdev); + return ret; } static void spi_pci_remove(struct pci_dev *pdev) diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 151ba316619e..faf40cb66498 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -2,11 +2,13 @@ #ifndef DW_SPI_HEADER_H #define DW_SPI_HEADER_H +#include <linux/bits.h> #include <linux/completion.h> #include <linux/debugfs.h> #include <linux/irqreturn.h> #include <linux/io.h> #include <linux/scatterlist.h> +#include <linux/spi/spi-mem.h> /* Register offsets */ #define DW_SPI_CTRLR0 0x00 @@ -34,6 +36,7 @@ #define DW_SPI_IDR 0x58 #define DW_SPI_VERSION 0x5c #define DW_SPI_DR 0x60 +#define DW_SPI_RX_SAMPLE_DLY 0xf0 #define DW_SPI_CS_OVERRIDE 0xf4 /* Bit fields in CTRLR0 */ @@ -69,6 +72,16 @@ #define DWC_SSI_CTRLR0_FRF_OFFSET 6 #define DWC_SSI_CTRLR0_DFS_OFFSET 0 +/* + * For Keem Bay, CTRLR0[31] is used to select controller mode. + * 0: SSI is slave + * 1: SSI is master + */ +#define DWC_SSI_CTRLR0_KEEMBAY_MST BIT(31) + +/* Bit fields in CTRLR1 */ +#define SPI_NDF_MASK GENMASK(15, 0) + /* Bit fields in SR, 7 bits */ #define SR_MASK 0x7f /* cover 7 bits */ #define SR_BUSY (1 << 0) @@ -91,8 +104,12 @@ #define SPI_DMA_RDMAE (1 << 0) #define SPI_DMA_TDMAE (1 << 1) -/* TX RX interrupt level threshold, max can be 256 */ -#define SPI_INT_THRESHOLD 32 +#define SPI_WAIT_RETRIES 5 +#define SPI_BUF_SIZE \ + (sizeof_field(struct spi_mem_op, cmd.opcode) + \ + sizeof_field(struct spi_mem_op, addr.val) + 256) +#define SPI_GET_BYTE(_val, _idx) \ + ((_val) >> (BITS_PER_BYTE * (_idx)) & 0xff) enum dw_ssi_type { SSI_MOTO_SPI = 0, @@ -100,6 +117,19 @@ enum dw_ssi_type { SSI_NS_MICROWIRE, }; +/* DW SPI capabilities */ +#define DW_SPI_CAP_CS_OVERRIDE BIT(0) +#define DW_SPI_CAP_KEEMBAY_MST BIT(1) +#define DW_SPI_CAP_DWC_SSI BIT(2) + +/* Slave spi_transfer/spi_mem_op related */ +struct dw_spi_cfg { + u8 tmode; + u8 dfs; + u32 ndf; + u32 freq; +}; + struct dw_spi; struct dw_spi_dma_ops { int (*dma_init)(struct device *dev, struct dw_spi *dws); @@ -113,39 +143,43 @@ struct dw_spi_dma_ops { struct dw_spi { struct spi_controller *master; - enum dw_ssi_type type; void __iomem *regs; unsigned long paddr; int irq; u32 fifo_len; /* depth of the FIFO buffer */ + u32 max_mem_freq; /* max mem-ops bus freq */ u32 max_freq; /* max bus freq supported */ - int cs_override; + u32 caps; /* DW SPI capabilities */ + u32 reg_io_width; /* DR I/O width in bytes */ u16 bus_num; u16 num_cs; /* supported slave numbers */ void (*set_cs)(struct spi_device *spi, bool enable); - u32 (*update_cr0)(struct spi_controller *master, struct spi_device *spi, - struct spi_transfer *transfer); /* Current message transfer state info */ - size_t len; void *tx; - void *tx_end; - spinlock_t buf_lock; + unsigned int tx_len; void *rx; - void *rx_end; + unsigned int rx_len; + u8 buf[SPI_BUF_SIZE]; int dma_mapped; u8 n_bytes; /* current is a 1/2 bytes op */ irqreturn_t (*transfer_handler)(struct dw_spi *dws); u32 current_freq; /* frequency in hz */ + u32 cur_rx_sample_dly; + u32 def_rx_sample_dly_ns; + + /* Custom memory operations */ + struct spi_controller_mem_ops mem_ops; /* DMA info */ struct dma_chan *txchan; u32 txburst; struct dma_chan *rxchan; u32 rxburst; + u32 dma_sg_burst; unsigned long dma_chan_busy; dma_addr_t dma_addr; /* phy address of the Data register */ const struct dw_spi_dma_ops *dma_ops; @@ -162,29 +196,19 @@ static inline u32 dw_readl(struct dw_spi *dws, u32 offset) return __raw_readl(dws->regs + offset); } -static inline u16 dw_readw(struct dw_spi *dws, u32 offset) -{ - return __raw_readw(dws->regs + offset); -} - static inline void dw_writel(struct dw_spi *dws, u32 offset, u32 val) { __raw_writel(val, dws->regs + offset); } -static inline void dw_writew(struct dw_spi *dws, u32 offset, u16 val) -{ - __raw_writew(val, dws->regs + offset); -} - static inline u32 dw_read_io_reg(struct dw_spi *dws, u32 offset) { switch (dws->reg_io_width) { case 2: - return dw_readw(dws, offset); + return readw_relaxed(dws->regs + offset); case 4: default: - return dw_readl(dws, offset); + return readl_relaxed(dws->regs + offset); } } @@ -192,11 +216,11 @@ static inline void dw_write_io_reg(struct dw_spi *dws, u32 offset, u32 val) { switch (dws->reg_io_width) { case 2: - dw_writew(dws, offset, val); + writew_relaxed(val, dws->regs + offset); break; case 4: default: - dw_writel(dws, offset, val); + writel_relaxed(val, dws->regs + offset); break; } } @@ -230,14 +254,16 @@ static inline void spi_umask_intr(struct dw_spi *dws, u32 mask) } /* - * This does disable the SPI controller, interrupts, and re-enable the - * controller back. Transmit and receive FIFO buffers are cleared when the - * device is disabled. + * This disables the SPI controller, interrupts, clears the interrupts status + * and CS, then re-enables the controller back. Transmit and receive FIFO + * buffers are cleared when the device is disabled. */ static inline void spi_reset_chip(struct dw_spi *dws) { spi_enable_chip(dws, 0); spi_mask_intr(dws, 0xff); + dw_readl(dws, DW_SPI_ICR); + dw_writel(dws, DW_SPI_SER, 0); spi_enable_chip(dws, 1); } @@ -248,16 +274,13 @@ static inline void spi_shutdown_chip(struct dw_spi *dws) } extern void dw_spi_set_cs(struct spi_device *spi, bool enable); +extern void dw_spi_update_config(struct dw_spi *dws, struct spi_device *spi, + struct dw_spi_cfg *cfg); +extern int dw_spi_check_status(struct dw_spi *dws, bool raw); 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); -extern u32 dw_spi_update_cr0(struct spi_controller *master, - struct spi_device *spi, - struct spi_transfer *transfer); -extern u32 dw_spi_update_cr0_v1_01a(struct spi_controller *master, - struct spi_device *spi, - struct spi_transfer *transfer); #ifdef CONFIG_SPI_DW_DMA diff --git a/drivers/spi/spi-fsi.c b/drivers/spi/spi-fsi.c index 37a3e0f8e752..8a440c7078ef 100644 --- a/drivers/spi/spi-fsi.c +++ b/drivers/spi/spi-fsi.c @@ -12,6 +12,7 @@ #define FSI_ENGID_SPI 0x23 #define FSI_MBOX_ROOT_CTRL_8 0x2860 +#define FSI_MBOX_ROOT_CTRL_8_SPI_MUX 0xf0000000 #define FSI2SPI_DATA0 0x00 #define FSI2SPI_DATA1 0x04 @@ -24,11 +25,16 @@ #define SPI_FSI_BASE 0x70000 #define SPI_FSI_INIT_TIMEOUT_MS 1000 -#define SPI_FSI_MAX_TRANSFER_SIZE 2048 +#define SPI_FSI_MAX_XFR_SIZE 2048 +#define SPI_FSI_MAX_XFR_SIZE_RESTRICTED 32 #define SPI_FSI_ERROR 0x0 #define SPI_FSI_COUNTER_CFG 0x1 #define SPI_FSI_COUNTER_CFG_LOOPS(x) (((u64)(x) & 0xffULL) << 32) +#define SPI_FSI_COUNTER_CFG_N2_RX BIT_ULL(8) +#define SPI_FSI_COUNTER_CFG_N2_TX BIT_ULL(9) +#define SPI_FSI_COUNTER_CFG_N2_IMPLICIT BIT_ULL(10) +#define SPI_FSI_COUNTER_CFG_N2_RELOAD BIT_ULL(11) #define SPI_FSI_CFG1 0x2 #define SPI_FSI_CLOCK_CFG 0x3 #define SPI_FSI_CLOCK_CFG_MM_ENABLE BIT_ULL(32) @@ -61,7 +67,7 @@ #define SPI_FSI_STATUS_RDR_OVERRUN BIT_ULL(62) #define SPI_FSI_STATUS_RDR_FULL BIT_ULL(63) #define SPI_FSI_STATUS_ANY_ERROR \ - (SPI_FSI_STATUS_ERROR | SPI_FSI_STATUS_TDR_UNDERRUN | \ + (SPI_FSI_STATUS_ERROR | \ SPI_FSI_STATUS_TDR_OVERRUN | SPI_FSI_STATUS_RDR_UNDERRUN | \ SPI_FSI_STATUS_RDR_OVERRUN) #define SPI_FSI_PORT_CTRL 0x9 @@ -70,6 +76,8 @@ struct fsi_spi { struct device *dev; /* SPI controller device */ struct fsi_device *fsi; /* FSI2SPI CFAM engine device */ u32 base; + size_t max_xfr_size; + bool restricted; }; struct fsi_spi_sequence { @@ -77,6 +85,26 @@ struct fsi_spi_sequence { u64 data; }; +static int fsi_spi_check_mux(struct fsi_device *fsi, struct device *dev) +{ + int rc; + u32 root_ctrl_8; + __be32 root_ctrl_8_be; + + rc = fsi_slave_read(fsi->slave, FSI_MBOX_ROOT_CTRL_8, &root_ctrl_8_be, + sizeof(root_ctrl_8_be)); + if (rc) + return rc; + + root_ctrl_8 = be32_to_cpu(root_ctrl_8_be); + dev_dbg(dev, "Root control register 8: %08x\n", root_ctrl_8); + if ((root_ctrl_8 & FSI_MBOX_ROOT_CTRL_8_SPI_MUX) == + FSI_MBOX_ROOT_CTRL_8_SPI_MUX) + return 0; + + return -ENOLINK; +} + static int fsi_spi_check_status(struct fsi_spi *ctx) { int rc; @@ -205,8 +233,12 @@ static int fsi_spi_reset(struct fsi_spi *ctx) if (rc) return rc; - return fsi_spi_write_reg(ctx, SPI_FSI_CLOCK_CFG, - SPI_FSI_CLOCK_CFG_RESET2); + rc = fsi_spi_write_reg(ctx, SPI_FSI_CLOCK_CFG, + SPI_FSI_CLOCK_CFG_RESET2); + if (rc) + return rc; + + return fsi_spi_write_reg(ctx, SPI_FSI_STATUS, 0ULL); } static int fsi_spi_sequence_add(struct fsi_spi_sequence *seq, u8 val) @@ -214,8 +246,8 @@ static int fsi_spi_sequence_add(struct fsi_spi_sequence *seq, u8 val) /* * Add the next byte of instruction to the 8-byte sequence register. * Then decrement the counter so that the next instruction will go in - * the right place. Return the number of "slots" left in the sequence - * register. + * the right place. Return the index of the slot we just filled in the + * sequence register. */ seq->data |= (u64)val << seq->bit; seq->bit -= 8; @@ -233,40 +265,71 @@ static int fsi_spi_sequence_transfer(struct fsi_spi *ctx, struct fsi_spi_sequence *seq, struct spi_transfer *transfer) { + bool docfg = false; int loops; int idx; int rc; + u8 val = 0; u8 len = min(transfer->len, 8U); u8 rem = transfer->len % len; + u64 cfg = 0ULL; loops = transfer->len / len; if (transfer->tx_buf) { - idx = fsi_spi_sequence_add(seq, - SPI_FSI_SEQUENCE_SHIFT_OUT(len)); + val = SPI_FSI_SEQUENCE_SHIFT_OUT(len); + idx = fsi_spi_sequence_add(seq, val); + if (rem) rem = SPI_FSI_SEQUENCE_SHIFT_OUT(rem); } else if (transfer->rx_buf) { - idx = fsi_spi_sequence_add(seq, - SPI_FSI_SEQUENCE_SHIFT_IN(len)); + val = SPI_FSI_SEQUENCE_SHIFT_IN(len); + idx = fsi_spi_sequence_add(seq, val); + if (rem) rem = SPI_FSI_SEQUENCE_SHIFT_IN(rem); } else { return -EINVAL; } + if (ctx->restricted) { + const int eidx = rem ? 5 : 6; + + while (loops > 1 && idx <= eidx) { + idx = fsi_spi_sequence_add(seq, val); + loops--; + docfg = true; + } + + if (loops > 1) { + dev_warn(ctx->dev, "No sequencer slots; aborting.\n"); + return -EINVAL; + } + } + if (loops > 1) { fsi_spi_sequence_add(seq, SPI_FSI_SEQUENCE_BRANCH(idx)); + docfg = true; + } - if (rem) - fsi_spi_sequence_add(seq, rem); + if (docfg) { + cfg = SPI_FSI_COUNTER_CFG_LOOPS(loops - 1); + if (transfer->rx_buf) + cfg |= SPI_FSI_COUNTER_CFG_N2_RX | + SPI_FSI_COUNTER_CFG_N2_TX | + SPI_FSI_COUNTER_CFG_N2_IMPLICIT | + SPI_FSI_COUNTER_CFG_N2_RELOAD; - rc = fsi_spi_write_reg(ctx, SPI_FSI_COUNTER_CFG, - SPI_FSI_COUNTER_CFG_LOOPS(loops - 1)); + rc = fsi_spi_write_reg(ctx, SPI_FSI_COUNTER_CFG, cfg); if (rc) return rc; + } else { + fsi_spi_write_reg(ctx, SPI_FSI_COUNTER_CFG, 0ULL); } + if (rem) + fsi_spi_sequence_add(seq, rem); + return 0; } @@ -275,6 +338,7 @@ static int fsi_spi_transfer_data(struct fsi_spi *ctx, { int rc = 0; u64 status = 0ULL; + u64 cfg = 0ULL; if (transfer->tx_buf) { int nb; @@ -312,6 +376,16 @@ static int fsi_spi_transfer_data(struct fsi_spi *ctx, u64 in = 0ULL; u8 *rx = transfer->rx_buf; + rc = fsi_spi_read_reg(ctx, SPI_FSI_COUNTER_CFG, &cfg); + if (rc) + return rc; + + if (cfg & SPI_FSI_COUNTER_CFG_N2_IMPLICIT) { + rc = fsi_spi_write_reg(ctx, SPI_FSI_DATA_TX, 0); + if (rc) + return rc; + } + while (transfer->len > recv) { do { rc = fsi_spi_read_reg(ctx, SPI_FSI_STATUS, @@ -350,7 +424,7 @@ static int fsi_spi_transfer_init(struct fsi_spi *ctx) u64 status = 0ULL; u64 wanted_clock_cfg = SPI_FSI_CLOCK_CFG_ECC_DISABLE | SPI_FSI_CLOCK_CFG_SCK_NO_DEL | - FIELD_PREP(SPI_FSI_CLOCK_CFG_SCK_DIV, 4); + FIELD_PREP(SPI_FSI_CLOCK_CFG_SCK_DIV, 19); end = jiffies + msecs_to_jiffies(SPI_FSI_INIT_TIMEOUT_MS); do { @@ -396,18 +470,22 @@ static int fsi_spi_transfer_init(struct fsi_spi *ctx) static int fsi_spi_transfer_one_message(struct spi_controller *ctlr, struct spi_message *mesg) { - int rc = 0; + int rc; u8 seq_slave = SPI_FSI_SEQUENCE_SEL_SLAVE(mesg->spi->chip_select + 1); struct spi_transfer *transfer; struct fsi_spi *ctx = spi_controller_get_devdata(ctlr); + rc = fsi_spi_check_mux(ctx->fsi, ctx->dev); + if (rc) + return rc; + list_for_each_entry(transfer, &mesg->transfers, transfer_list) { struct fsi_spi_sequence seq; struct spi_transfer *next = NULL; /* Sequencer must do shift out (tx) first. */ if (!transfer->tx_buf || - transfer->len > SPI_FSI_MAX_TRANSFER_SIZE) { + transfer->len > (ctx->max_xfr_size + 8)) { rc = -EINVAL; goto error; } @@ -431,7 +509,7 @@ static int fsi_spi_transfer_one_message(struct spi_controller *ctlr, /* Sequencer can only do shift in (rx) after tx. */ if (next->rx_buf) { - if (next->len > SPI_FSI_MAX_TRANSFER_SIZE) { + if (next->len > ctx->max_xfr_size) { rc = -EINVAL; goto error; } @@ -476,30 +554,21 @@ error: static size_t fsi_spi_max_transfer_size(struct spi_device *spi) { - return SPI_FSI_MAX_TRANSFER_SIZE; + struct fsi_spi *ctx = spi_controller_get_devdata(spi->controller); + + return ctx->max_xfr_size; } static int fsi_spi_probe(struct device *dev) { int rc; - u32 root_ctrl_8; struct device_node *np; int num_controllers_registered = 0; struct fsi_device *fsi = to_fsi_dev(dev); - /* - * Check the SPI mux before attempting to probe. If the mux isn't set - * then the SPI controllers can't access their slave devices. - */ - rc = fsi_slave_read(fsi->slave, FSI_MBOX_ROOT_CTRL_8, &root_ctrl_8, - sizeof(root_ctrl_8)); + rc = fsi_spi_check_mux(fsi, dev); if (rc) - return rc; - - if (!root_ctrl_8) { - dev_dbg(dev, "SPI mux not set, aborting probe.\n"); return -ENODEV; - } for_each_available_child_of_node(dev->of_node, np) { u32 base; @@ -524,6 +593,14 @@ static int fsi_spi_probe(struct device *dev) ctx->fsi = fsi; ctx->base = base + SPI_FSI_BASE; + if (of_device_is_compatible(np, "ibm,fsi2spi-restricted")) { + ctx->restricted = true; + ctx->max_xfr_size = SPI_FSI_MAX_XFR_SIZE_RESTRICTED; + } else { + ctx->restricted = false; + ctx->max_xfr_size = SPI_FSI_MAX_XFR_SIZE; + } + rc = devm_spi_register_controller(dev, ctlr); if (rc) spi_controller_put(ctlr); diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 108a7d50d2c3..3967afa465f0 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -53,7 +53,6 @@ #define SPI_SR 0x2c #define SPI_SR_TCFQF BIT(31) -#define SPI_SR_EOQF BIT(28) #define SPI_SR_TFUF BIT(27) #define SPI_SR_TFFF BIT(25) #define SPI_SR_CMDTCF BIT(23) @@ -62,7 +61,7 @@ #define SPI_SR_TFIWF BIT(18) #define SPI_SR_RFDF BIT(17) #define SPI_SR_CMDFFF BIT(16) -#define SPI_SR_CLEAR (SPI_SR_TCFQF | SPI_SR_EOQF | \ +#define SPI_SR_CLEAR (SPI_SR_TCFQF | \ SPI_SR_TFUF | SPI_SR_TFFF | \ SPI_SR_CMDTCF | SPI_SR_SPEF | \ SPI_SR_RFOF | SPI_SR_TFIWF | \ @@ -75,7 +74,6 @@ #define SPI_RSER 0x30 #define SPI_RSER_TCFQE BIT(31) -#define SPI_RSER_EOQFE BIT(28) #define SPI_RSER_CMDTCFE BIT(23) #define SPI_PUSHR 0x34 @@ -114,7 +112,6 @@ struct chip_data { }; enum dspi_trans_mode { - DSPI_EOQ_MODE = 0, DSPI_XSPI_MODE, DSPI_DMA_MODE, }; @@ -189,7 +186,7 @@ static const struct fsl_dspi_devtype_data devtype_data[] = { .fifo_size = 4, }, [MCF5441X] = { - .trans_mode = DSPI_EOQ_MODE, + .trans_mode = DSPI_DMA_MODE, .max_clock_factor = 8, .fifo_size = 16, }, @@ -671,11 +668,6 @@ static void ns_delay_scale(char *psc, char *sc, int delay_ns, } } -static void dspi_pushr_write(struct fsl_dspi *dspi) -{ - regmap_write(dspi->regmap, SPI_PUSHR, dspi_pop_tx_pushr(dspi)); -} - static void dspi_pushr_cmd_write(struct fsl_dspi *dspi, u16 cmd) { /* @@ -735,21 +727,6 @@ static void dspi_xspi_fifo_write(struct fsl_dspi *dspi, int num_words) } } -static void dspi_eoq_fifo_write(struct fsl_dspi *dspi, int num_words) -{ - u16 xfer_cmd = dspi->tx_cmd; - - /* Fill TX FIFO with as many transfers as possible */ - while (num_words--) { - dspi->tx_cmd = xfer_cmd; - /* Request EOQF for last transfer in FIFO */ - if (num_words == 0) - dspi->tx_cmd |= SPI_PUSHR_CMD_EOQ; - /* Write combined TX FIFO and CMD FIFO entry */ - dspi_pushr_write(dspi); - } -} - static u32 dspi_popr_read(struct fsl_dspi *dspi) { u32 rxdata = 0; @@ -818,7 +795,7 @@ no_accel: dspi->oper_word_size = DIV_ROUND_UP(dspi->oper_bits_per_word, 8); /* - * Update CTAR here (code is common for EOQ, XSPI and DMA modes). + * Update CTAR here (code is common for XSPI and DMA modes). * We will update CTARE in the portion specific to XSPI, when we * also know the preload value (DTCP). */ @@ -862,10 +839,7 @@ static void dspi_fifo_write(struct fsl_dspi *dspi) spi_take_timestamp_pre(dspi->ctlr, xfer, dspi->progress, !dspi->irq); - if (dspi->devtype_data->trans_mode == DSPI_EOQ_MODE) - dspi_eoq_fifo_write(dspi, num_words); - else - dspi_xspi_fifo_write(dspi, num_words); + dspi_xspi_fifo_write(dspi, num_words); /* * Everything after this point is in a potential race with the next * interrupt, so we must never use dspi->words_in_flight again since it @@ -898,7 +872,7 @@ static int dspi_poll(struct fsl_dspi *dspi) regmap_read(dspi->regmap, SPI_SR, &spi_sr); regmap_write(dspi->regmap, SPI_SR, spi_sr); - if (spi_sr & (SPI_SR_EOQF | SPI_SR_CMDTCF)) + if (spi_sr & SPI_SR_CMDTCF) break; } while (--tries); @@ -916,7 +890,7 @@ static irqreturn_t dspi_interrupt(int irq, void *dev_id) regmap_read(dspi->regmap, SPI_SR, &spi_sr); regmap_write(dspi->regmap, SPI_SR, spi_sr); - if (!(spi_sr & (SPI_SR_EOQF | SPI_SR_CMDTCF))) + if (!(spi_sr & SPI_SR_CMDTCF)) return IRQ_NONE; if (dspi_rxtx(dspi) == 0) @@ -1204,9 +1178,6 @@ static int dspi_init(struct fsl_dspi *dspi) regmap_write(dspi->regmap, SPI_SR, SPI_SR_CLEAR); switch (dspi->devtype_data->trans_mode) { - case DSPI_EOQ_MODE: - regmap_write(dspi->regmap, SPI_RSER, SPI_RSER_EOQFE); - break; case DSPI_XSPI_MODE: regmap_write(dspi->regmap, SPI_RSER, SPI_RSER_CMDTCFE); break; @@ -1245,22 +1216,6 @@ static int dspi_slave_abort(struct spi_master *master) return 0; } -/* - * EOQ mode will inevitably deassert its PCS signal on last word in a queue - * (hardware limitation), so we need to inform the spi_device that larger - * buffers than the FIFO size are going to have the chip select randomly - * toggling, so it has a chance to adapt its message sizes. - */ -static size_t dspi_max_message_size(struct spi_device *spi) -{ - struct fsl_dspi *dspi = spi_controller_get_devdata(spi->controller); - - if (dspi->devtype_data->trans_mode == DSPI_EOQ_MODE) - return dspi->devtype_data->fifo_size; - - return SIZE_MAX; -} - static int dspi_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -1289,7 +1244,6 @@ static int dspi_probe(struct platform_device *pdev) ctlr->setup = dspi_setup; ctlr->transfer_one_message = dspi_transfer_one_message; - ctlr->max_message_size = dspi_max_message_size; ctlr->dev.of_node = pdev->dev.of_node; ctlr->cleanup = dspi_cleanup; diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c index 6d148ab70b93..cf2b947c600e 100644 --- a/drivers/spi/spi-fsl-espi.c +++ b/drivers/spi/spi-fsl-espi.c @@ -731,7 +731,7 @@ static int fsl_espi_probe(struct device *dev, struct resource *mem, if (ret < 0) goto err_pm; - dev_info(dev, "at 0x%p (irq = %u)\n", espi->reg_base, irq); + dev_info(dev, "irq = %u\n", irq); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index 85a5c952389a..986b9793fd3c 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -944,8 +944,7 @@ static int fsl_lpspi_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM_SLEEP -static int fsl_lpspi_suspend(struct device *dev) +static int __maybe_unused fsl_lpspi_suspend(struct device *dev) { int ret; @@ -954,7 +953,7 @@ static int fsl_lpspi_suspend(struct device *dev) return ret; } -static int fsl_lpspi_resume(struct device *dev) +static int __maybe_unused fsl_lpspi_resume(struct device *dev) { int ret; @@ -968,7 +967,6 @@ static int fsl_lpspi_resume(struct device *dev) return 0; } -#endif /* CONFIG_PM_SLEEP */ static const struct dev_pm_ops fsl_lpspi_pm_ops = { SET_RUNTIME_PM_OPS(fsl_lpspi_runtime_suspend, diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c index 80cea5cd3612..25810a7eef10 100644 --- a/drivers/spi/spi-geni-qcom.c +++ b/drivers/spi/spi-geni-qcom.c @@ -290,6 +290,7 @@ static int spi_geni_init(struct spi_geni_master *mas) { struct geni_se *se = &mas->se; unsigned int proto, major, minor, ver; + u32 spi_tx_cfg; pm_runtime_get_sync(mas->dev); @@ -308,7 +309,7 @@ static int spi_geni_init(struct spi_geni_master *mas) * Hardware programming guide suggests to configure * RX FIFO RFR level to fifo_depth-2. */ - geni_se_init(se, mas->tx_fifo_depth / 2, mas->tx_fifo_depth - 2); + geni_se_init(se, mas->tx_fifo_depth - 3, mas->tx_fifo_depth - 2); /* Transmit an entire FIFO worth of data per IRQ */ mas->tx_wm = 1; ver = geni_se_get_qup_hw_version(se); @@ -322,16 +323,103 @@ static int spi_geni_init(struct spi_geni_master *mas) geni_se_select_mode(se, GENI_SE_FIFO); + /* We always control CS manually */ + spi_tx_cfg = readl(se->base + SE_SPI_TRANS_CFG); + spi_tx_cfg &= ~CS_TOGGLE; + writel(spi_tx_cfg, se->base + SE_SPI_TRANS_CFG); + pm_runtime_put(mas->dev); return 0; } +static unsigned int geni_byte_per_fifo_word(struct spi_geni_master *mas) +{ + /* + * Calculate how many bytes we'll put in each FIFO word. If the + * transfer words don't pack cleanly into a FIFO word we'll just put + * one transfer word in each FIFO word. If they do pack we'll pack 'em. + */ + if (mas->fifo_width_bits % mas->cur_bits_per_word) + return roundup_pow_of_two(DIV_ROUND_UP(mas->cur_bits_per_word, + BITS_PER_BYTE)); + + return mas->fifo_width_bits / BITS_PER_BYTE; +} + +static bool geni_spi_handle_tx(struct spi_geni_master *mas) +{ + struct geni_se *se = &mas->se; + unsigned int max_bytes; + const u8 *tx_buf; + unsigned int bytes_per_fifo_word = geni_byte_per_fifo_word(mas); + unsigned int i = 0; + + max_bytes = (mas->tx_fifo_depth - mas->tx_wm) * bytes_per_fifo_word; + if (mas->tx_rem_bytes < max_bytes) + max_bytes = mas->tx_rem_bytes; + + tx_buf = mas->cur_xfer->tx_buf + mas->cur_xfer->len - mas->tx_rem_bytes; + while (i < max_bytes) { + unsigned int j; + unsigned int bytes_to_write; + u32 fifo_word = 0; + u8 *fifo_byte = (u8 *)&fifo_word; + + bytes_to_write = min(bytes_per_fifo_word, max_bytes - i); + for (j = 0; j < bytes_to_write; j++) + fifo_byte[j] = tx_buf[i++]; + iowrite32_rep(se->base + SE_GENI_TX_FIFOn, &fifo_word, 1); + } + mas->tx_rem_bytes -= max_bytes; + if (!mas->tx_rem_bytes) { + writel(0, se->base + SE_GENI_TX_WATERMARK_REG); + return false; + } + return true; +} + +static void geni_spi_handle_rx(struct spi_geni_master *mas) +{ + struct geni_se *se = &mas->se; + u32 rx_fifo_status; + unsigned int rx_bytes; + unsigned int rx_last_byte_valid; + u8 *rx_buf; + unsigned int bytes_per_fifo_word = geni_byte_per_fifo_word(mas); + unsigned int i = 0; + + rx_fifo_status = readl(se->base + SE_GENI_RX_FIFO_STATUS); + rx_bytes = (rx_fifo_status & RX_FIFO_WC_MSK) * bytes_per_fifo_word; + if (rx_fifo_status & RX_LAST) { + rx_last_byte_valid = rx_fifo_status & RX_LAST_BYTE_VALID_MSK; + rx_last_byte_valid >>= RX_LAST_BYTE_VALID_SHFT; + if (rx_last_byte_valid && rx_last_byte_valid < 4) + rx_bytes -= bytes_per_fifo_word - rx_last_byte_valid; + } + if (mas->rx_rem_bytes < rx_bytes) + rx_bytes = mas->rx_rem_bytes; + + rx_buf = mas->cur_xfer->rx_buf + mas->cur_xfer->len - mas->rx_rem_bytes; + while (i < rx_bytes) { + u32 fifo_word = 0; + u8 *fifo_byte = (u8 *)&fifo_word; + unsigned int bytes_to_read; + unsigned int j; + + bytes_to_read = min(bytes_per_fifo_word, rx_bytes - i); + ioread32_rep(se->base + SE_GENI_RX_FIFOn, &fifo_word, 1); + for (j = 0; j < bytes_to_read; j++) + rx_buf[i++] = fifo_byte[j]; + } + mas->rx_rem_bytes -= rx_bytes; +} + static void setup_fifo_xfer(struct spi_transfer *xfer, struct spi_geni_master *mas, u16 mode, struct spi_master *spi) { u32 m_cmd = 0; - u32 spi_tx_cfg, len; + u32 len; struct geni_se *se = &mas->se; int ret; @@ -350,7 +438,6 @@ static void setup_fifo_xfer(struct spi_transfer *xfer, spin_lock_irq(&mas->lock); spin_unlock_irq(&mas->lock); - spi_tx_cfg = readl(se->base + SE_SPI_TRANS_CFG); if (xfer->bits_per_word != mas->cur_bits_per_word) { spi_setup_word_len(mas, mode, xfer->bits_per_word); mas->cur_bits_per_word = xfer->bits_per_word; @@ -364,8 +451,6 @@ static void setup_fifo_xfer(struct spi_transfer *xfer, mas->tx_rem_bytes = 0; mas->rx_rem_bytes = 0; - spi_tx_cfg &= ~CS_TOGGLE; - if (!(mas->cur_bits_per_word % MIN_WORD_LEN)) len = xfer->len * BITS_PER_BYTE / mas->cur_bits_per_word; else @@ -384,7 +469,6 @@ static void setup_fifo_xfer(struct spi_transfer *xfer, writel(len, se->base + SE_SPI_RX_TRANS_LEN); mas->rx_rem_bytes = xfer->len; } - writel(spi_tx_cfg, se->base + SE_SPI_TRANS_CFG); /* * Lock around right before we start the transfer since our @@ -398,8 +482,10 @@ static void setup_fifo_xfer(struct spi_transfer *xfer, * setting up GENI SE engine, as driver starts data transfer * for the watermark interrupt. */ - if (m_cmd & SPI_TX_ONLY) - writel(mas->tx_wm, se->base + SE_GENI_TX_WATERMARK_REG); + if (m_cmd & SPI_TX_ONLY) { + if (geni_spi_handle_tx(mas)) + writel(mas->tx_wm, se->base + SE_GENI_TX_WATERMARK_REG); + } spin_unlock_irq(&mas->lock); } @@ -417,85 +503,6 @@ static int spi_geni_transfer_one(struct spi_master *spi, return 1; } -static unsigned int geni_byte_per_fifo_word(struct spi_geni_master *mas) -{ - /* - * Calculate how many bytes we'll put in each FIFO word. If the - * transfer words don't pack cleanly into a FIFO word we'll just put - * one transfer word in each FIFO word. If they do pack we'll pack 'em. - */ - if (mas->fifo_width_bits % mas->cur_bits_per_word) - return roundup_pow_of_two(DIV_ROUND_UP(mas->cur_bits_per_word, - BITS_PER_BYTE)); - - return mas->fifo_width_bits / BITS_PER_BYTE; -} - -static void geni_spi_handle_tx(struct spi_geni_master *mas) -{ - struct geni_se *se = &mas->se; - unsigned int max_bytes; - const u8 *tx_buf; - unsigned int bytes_per_fifo_word = geni_byte_per_fifo_word(mas); - unsigned int i = 0; - - max_bytes = (mas->tx_fifo_depth - mas->tx_wm) * bytes_per_fifo_word; - if (mas->tx_rem_bytes < max_bytes) - max_bytes = mas->tx_rem_bytes; - - tx_buf = mas->cur_xfer->tx_buf + mas->cur_xfer->len - mas->tx_rem_bytes; - while (i < max_bytes) { - unsigned int j; - unsigned int bytes_to_write; - u32 fifo_word = 0; - u8 *fifo_byte = (u8 *)&fifo_word; - - bytes_to_write = min(bytes_per_fifo_word, max_bytes - i); - for (j = 0; j < bytes_to_write; j++) - fifo_byte[j] = tx_buf[i++]; - iowrite32_rep(se->base + SE_GENI_TX_FIFOn, &fifo_word, 1); - } - mas->tx_rem_bytes -= max_bytes; - if (!mas->tx_rem_bytes) - writel(0, se->base + SE_GENI_TX_WATERMARK_REG); -} - -static void geni_spi_handle_rx(struct spi_geni_master *mas) -{ - struct geni_se *se = &mas->se; - u32 rx_fifo_status; - unsigned int rx_bytes; - unsigned int rx_last_byte_valid; - u8 *rx_buf; - unsigned int bytes_per_fifo_word = geni_byte_per_fifo_word(mas); - unsigned int i = 0; - - rx_fifo_status = readl(se->base + SE_GENI_RX_FIFO_STATUS); - rx_bytes = (rx_fifo_status & RX_FIFO_WC_MSK) * bytes_per_fifo_word; - if (rx_fifo_status & RX_LAST) { - rx_last_byte_valid = rx_fifo_status & RX_LAST_BYTE_VALID_MSK; - rx_last_byte_valid >>= RX_LAST_BYTE_VALID_SHFT; - if (rx_last_byte_valid && rx_last_byte_valid < 4) - rx_bytes -= bytes_per_fifo_word - rx_last_byte_valid; - } - if (mas->rx_rem_bytes < rx_bytes) - rx_bytes = mas->rx_rem_bytes; - - rx_buf = mas->cur_xfer->rx_buf + mas->cur_xfer->len - mas->rx_rem_bytes; - while (i < rx_bytes) { - u32 fifo_word = 0; - u8 *fifo_byte = (u8 *)&fifo_word; - unsigned int bytes_to_read; - unsigned int j; - - bytes_to_read = min(bytes_per_fifo_word, rx_bytes - i); - ioread32_rep(se->base + SE_GENI_RX_FIFOn, &fifo_word, 1); - for (j = 0; j < bytes_to_read; j++) - rx_buf[i++] = fifo_byte[j]; - } - mas->rx_rem_bytes -= rx_bytes; -} - static irqreturn_t geni_spi_isr(int irq, void *data) { struct spi_master *spi = data; @@ -613,11 +620,9 @@ static int spi_geni_probe(struct platform_device *pdev) return PTR_ERR(mas->se.opp_table); /* OPP table is optional */ ret = dev_pm_opp_of_add_table(&pdev->dev); - if (!ret) { - mas->se.has_opp_table = true; - } else if (ret != -ENODEV) { + if (ret && ret != -ENODEV) { dev_err(&pdev->dev, "invalid OPP table in device tree\n"); - return ret; + goto put_clkname; } spi->bus_num = -1; @@ -669,8 +674,8 @@ spi_geni_probe_free_irq: spi_geni_probe_runtime_disable: pm_runtime_disable(dev); spi_master_put(spi); - if (mas->se.has_opp_table) - dev_pm_opp_of_remove_table(&pdev->dev); + dev_pm_opp_of_remove_table(&pdev->dev); +put_clkname: dev_pm_opp_put_clkname(mas->se.opp_table); return ret; } @@ -685,8 +690,7 @@ static int spi_geni_remove(struct platform_device *pdev) free_irq(mas->irq, spi); pm_runtime_disable(&pdev->dev); - if (mas->se.has_opp_table) - dev_pm_opp_of_remove_table(&pdev->dev); + dev_pm_opp_of_remove_table(&pdev->dev); dev_pm_opp_put_clkname(mas->se.opp_table); return 0; } diff --git a/drivers/spi/spi-hisi-sfc-v3xx.c b/drivers/spi/spi-hisi-sfc-v3xx.c index 64a18d08a4d9..4650b483a33d 100644 --- a/drivers/spi/spi-hisi-sfc-v3xx.c +++ b/drivers/spi/spi-hisi-sfc-v3xx.c @@ -7,7 +7,9 @@ #include <linux/acpi.h> #include <linux/bitops.h> +#include <linux/completion.h> #include <linux/dmi.h> +#include <linux/interrupt.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/platform_device.h> @@ -17,18 +19,11 @@ #define HISI_SFC_V3XX_VERSION (0x1f8) -#define HISI_SFC_V3XX_INT_STAT (0x120) -#define HISI_SFC_V3XX_INT_STAT_PP_ERR BIT(2) -#define HISI_SFC_V3XX_INT_STAT_ADDR_IACCES BIT(5) +#define HISI_SFC_V3XX_RAW_INT_STAT (0x120) +#define HISI_SFC_V3XX_INT_STAT (0x124) +#define HISI_SFC_V3XX_INT_MASK (0x128) #define HISI_SFC_V3XX_INT_CLR (0x12c) -#define HISI_SFC_V3XX_INT_CLR_CLEAR (0xff) #define HISI_SFC_V3XX_CMD_CFG (0x300) -#define HISI_SFC_V3XX_CMD_CFG_DUAL_IN_DUAL_OUT (1 << 17) -#define HISI_SFC_V3XX_CMD_CFG_DUAL_IO (2 << 17) -#define HISI_SFC_V3XX_CMD_CFG_FULL_DIO (3 << 17) -#define HISI_SFC_V3XX_CMD_CFG_QUAD_IN_QUAD_OUT (5 << 17) -#define HISI_SFC_V3XX_CMD_CFG_QUAD_IO (6 << 17) -#define HISI_SFC_V3XX_CMD_CFG_FULL_QIO (7 << 17) #define HISI_SFC_V3XX_CMD_CFG_DATA_CNT_OFF 9 #define HISI_SFC_V3XX_CMD_CFG_RW_MSK BIT(8) #define HISI_SFC_V3XX_CMD_CFG_DATA_EN_MSK BIT(7) @@ -40,12 +35,99 @@ #define HISI_SFC_V3XX_CMD_ADDR (0x30c) #define HISI_SFC_V3XX_CMD_DATABUF0 (0x400) +/* Common definition of interrupt bit masks */ +#define HISI_SFC_V3XX_INT_MASK_ALL (0x1ff) /* all the masks */ +#define HISI_SFC_V3XX_INT_MASK_CPLT BIT(0) /* command execution complete */ +#define HISI_SFC_V3XX_INT_MASK_PP_ERR BIT(2) /* page progrom error */ +#define HISI_SFC_V3XX_INT_MASK_IACCES BIT(5) /* error visiting inaccessible/ + * protected address + */ + +/* IO Mode definition in HISI_SFC_V3XX_CMD_CFG */ +#define HISI_SFC_V3XX_STD (0 << 17) +#define HISI_SFC_V3XX_DIDO (1 << 17) +#define HISI_SFC_V3XX_DIO (2 << 17) +#define HISI_SFC_V3XX_FULL_DIO (3 << 17) +#define HISI_SFC_V3XX_QIQO (5 << 17) +#define HISI_SFC_V3XX_QIO (6 << 17) +#define HISI_SFC_V3XX_FULL_QIO (7 << 17) + +/* + * The IO modes lookup table. hisi_sfc_v3xx_io_modes[(z - 1) / 2][y / 2][x / 2] + * stands for x-y-z mode, as described in SFDP terminology. -EIO indicates + * an invalid mode. + */ +static const int hisi_sfc_v3xx_io_modes[2][3][3] = { + { + { HISI_SFC_V3XX_DIDO, HISI_SFC_V3XX_DIDO, HISI_SFC_V3XX_DIDO }, + { HISI_SFC_V3XX_DIO, HISI_SFC_V3XX_FULL_DIO, -EIO }, + { -EIO, -EIO, -EIO }, + }, + { + { HISI_SFC_V3XX_QIQO, HISI_SFC_V3XX_QIQO, HISI_SFC_V3XX_QIQO }, + { -EIO, -EIO, -EIO }, + { HISI_SFC_V3XX_QIO, -EIO, HISI_SFC_V3XX_FULL_QIO }, + }, +}; + struct hisi_sfc_v3xx_host { struct device *dev; void __iomem *regbase; int max_cmd_dword; + struct completion *completion; + int irq; }; +static void hisi_sfc_v3xx_disable_int(struct hisi_sfc_v3xx_host *host) +{ + writel(0, host->regbase + HISI_SFC_V3XX_INT_MASK); +} + +static void hisi_sfc_v3xx_enable_int(struct hisi_sfc_v3xx_host *host) +{ + writel(HISI_SFC_V3XX_INT_MASK_ALL, host->regbase + HISI_SFC_V3XX_INT_MASK); +} + +static void hisi_sfc_v3xx_clear_int(struct hisi_sfc_v3xx_host *host) +{ + writel(HISI_SFC_V3XX_INT_MASK_ALL, host->regbase + HISI_SFC_V3XX_INT_CLR); +} + +/* + * The interrupt status register indicates whether an error occurs + * after per operation. Check it, and clear the interrupts for + * next time judgement. + */ +static int hisi_sfc_v3xx_handle_completion(struct hisi_sfc_v3xx_host *host) +{ + u32 reg; + + reg = readl(host->regbase + HISI_SFC_V3XX_RAW_INT_STAT); + hisi_sfc_v3xx_clear_int(host); + + if (reg & HISI_SFC_V3XX_INT_MASK_IACCES) { + dev_err(host->dev, "fail to access protected address\n"); + return -EIO; + } + + if (reg & HISI_SFC_V3XX_INT_MASK_PP_ERR) { + dev_err(host->dev, "page program operation failed\n"); + return -EIO; + } + + /* + * The other bits of the interrupt registers is not currently + * used and probably not be triggered in this driver. When it + * happens, we regard it as an unsupported error here. + */ + if (!(reg & HISI_SFC_V3XX_INT_MASK_CPLT)) { + dev_err(host->dev, "unsupported error occurred, status=0x%x\n", reg); + return -EIO; + } + + return 0; +} + #define HISI_SFC_V3XX_WAIT_TIMEOUT_US 1000000 #define HISI_SFC_V3XX_WAIT_POLL_INTERVAL_US 10 @@ -80,6 +162,20 @@ static int hisi_sfc_v3xx_adjust_op_size(struct spi_mem *mem, } /* + * The controller only supports Standard SPI mode, Duall mode and + * Quad mode. Double sanitize the ops here to avoid OOB access. + */ +static bool hisi_sfc_v3xx_supports_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + if (op->data.buswidth > 4 || op->dummy.buswidth > 4 || + op->addr.buswidth > 4 || op->cmd.buswidth > 4) + return false; + + return spi_mem_default_supports_op(mem, op); +} + +/* * memcpy_{to,from}io doesn't gurantee 32b accesses - which we require for the * DATABUF registers -so use __io{read,write}32_copy when possible. For * trailing bytes, copy them byte-by-byte from the DATABUF register, as we @@ -163,61 +259,36 @@ static void hisi_sfc_v3xx_write_databuf(struct hisi_sfc_v3xx_host *host, } } -static int hisi_sfc_v3xx_generic_exec_op(struct hisi_sfc_v3xx_host *host, - const struct spi_mem_op *op, - u8 chip_select) +static int hisi_sfc_v3xx_start_bus(struct hisi_sfc_v3xx_host *host, + const struct spi_mem_op *op, + u8 chip_select) { - int ret, len = op->data.nbytes; - u32 int_stat, config = 0; + int len = op->data.nbytes, buswidth_mode; + u32 config = 0; if (op->addr.nbytes) config |= HISI_SFC_V3XX_CMD_CFG_ADDR_EN_MSK; - switch (op->data.buswidth) { - case 0 ... 1: - break; - case 2: - if (op->addr.buswidth <= 1) { - config |= HISI_SFC_V3XX_CMD_CFG_DUAL_IN_DUAL_OUT; - } else if (op->addr.buswidth == 2) { - if (op->cmd.buswidth <= 1) { - config |= HISI_SFC_V3XX_CMD_CFG_DUAL_IO; - } else if (op->cmd.buswidth == 2) { - config |= HISI_SFC_V3XX_CMD_CFG_FULL_DIO; - } else { - return -EIO; - } - } else { - return -EIO; - } - break; - case 4: - if (op->addr.buswidth <= 1) { - config |= HISI_SFC_V3XX_CMD_CFG_QUAD_IN_QUAD_OUT; - } else if (op->addr.buswidth == 4) { - if (op->cmd.buswidth <= 1) { - config |= HISI_SFC_V3XX_CMD_CFG_QUAD_IO; - } else if (op->cmd.buswidth == 4) { - config |= HISI_SFC_V3XX_CMD_CFG_FULL_QIO; - } else { - return -EIO; - } - } else { - return -EIO; - } - break; - default: - return -EOPNOTSUPP; + if (op->data.buswidth == 0 || op->data.buswidth == 1) { + buswidth_mode = HISI_SFC_V3XX_STD; + } else { + int data_idx, addr_idx, cmd_idx; + + data_idx = (op->data.buswidth - 1) / 2; + addr_idx = op->addr.buswidth / 2; + cmd_idx = op->cmd.buswidth / 2; + buswidth_mode = hisi_sfc_v3xx_io_modes[data_idx][addr_idx][cmd_idx]; } + if (buswidth_mode < 0) + return buswidth_mode; + config |= buswidth_mode; if (op->data.dir != SPI_MEM_NO_DATA) { config |= (len - 1) << HISI_SFC_V3XX_CMD_CFG_DATA_CNT_OFF; config |= HISI_SFC_V3XX_CMD_CFG_DATA_EN_MSK; } - if (op->data.dir == SPI_MEM_DATA_OUT) - hisi_sfc_v3xx_write_databuf(host, op->data.buf.out, len); - else if (op->data.dir == SPI_MEM_DATA_IN) + if (op->data.dir == SPI_MEM_DATA_IN) config |= HISI_SFC_V3XX_CMD_CFG_RW_MSK; config |= op->dummy.nbytes << HISI_SFC_V3XX_CMD_CFG_DUMMY_CNT_OFF | @@ -229,31 +300,46 @@ static int hisi_sfc_v3xx_generic_exec_op(struct hisi_sfc_v3xx_host *host, writel(config, host->regbase + HISI_SFC_V3XX_CMD_CFG); - ret = hisi_sfc_v3xx_wait_cmd_idle(host); + return 0; +} + +static int hisi_sfc_v3xx_generic_exec_op(struct hisi_sfc_v3xx_host *host, + const struct spi_mem_op *op, + u8 chip_select) +{ + DECLARE_COMPLETION_ONSTACK(done); + int ret; + + if (host->irq) { + host->completion = &done; + hisi_sfc_v3xx_enable_int(host); + } + + if (op->data.dir == SPI_MEM_DATA_OUT) + hisi_sfc_v3xx_write_databuf(host, op->data.buf.out, op->data.nbytes); + + ret = hisi_sfc_v3xx_start_bus(host, op, chip_select); if (ret) return ret; - /* - * The interrupt status register indicates whether an error occurs - * after per operation. Check it, and clear the interrupts for - * next time judgement. - */ - int_stat = readl(host->regbase + HISI_SFC_V3XX_INT_STAT); - writel(HISI_SFC_V3XX_INT_CLR_CLEAR, - host->regbase + HISI_SFC_V3XX_INT_CLR); + if (host->irq) { + ret = wait_for_completion_timeout(host->completion, + usecs_to_jiffies(HISI_SFC_V3XX_WAIT_TIMEOUT_US)); + if (!ret) + ret = -ETIMEDOUT; + else + ret = 0; - if (int_stat & HISI_SFC_V3XX_INT_STAT_ADDR_IACCES) { - dev_err(host->dev, "fail to access protected address\n"); - return -EIO; + hisi_sfc_v3xx_disable_int(host); + host->completion = NULL; + } else { + ret = hisi_sfc_v3xx_wait_cmd_idle(host); } - - if (int_stat & HISI_SFC_V3XX_INT_STAT_PP_ERR) { - dev_err(host->dev, "page program operation failed\n"); + if (hisi_sfc_v3xx_handle_completion(host) || ret) return -EIO; - } if (op->data.dir == SPI_MEM_DATA_IN) - hisi_sfc_v3xx_read_databuf(host, op->data.buf.in, len); + hisi_sfc_v3xx_read_databuf(host, op->data.buf.in, op->data.nbytes); return 0; } @@ -272,9 +358,21 @@ static int hisi_sfc_v3xx_exec_op(struct spi_mem *mem, static const struct spi_controller_mem_ops hisi_sfc_v3xx_mem_ops = { .adjust_op_size = hisi_sfc_v3xx_adjust_op_size, + .supports_op = hisi_sfc_v3xx_supports_op, .exec_op = hisi_sfc_v3xx_exec_op, }; +static irqreturn_t hisi_sfc_v3xx_isr(int irq, void *data) +{ + struct hisi_sfc_v3xx_host *host = data; + + hisi_sfc_v3xx_disable_int(host); + + complete(host->completion); + + return IRQ_HANDLED; +} + static int hisi_sfc_v3xx_buswidth_override_bits; /* @@ -341,6 +439,26 @@ static int hisi_sfc_v3xx_probe(struct platform_device *pdev) goto err_put_master; } + host->irq = platform_get_irq_optional(pdev, 0); + if (host->irq == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto err_put_master; + } + + hisi_sfc_v3xx_disable_int(host); + + if (host->irq > 0) { + ret = devm_request_irq(dev, host->irq, hisi_sfc_v3xx_isr, 0, + "hisi-sfc-v3xx", host); + + if (ret) { + dev_err(dev, "failed to request irq%d, ret = %d\n", host->irq, ret); + host->irq = 0; + } + } else { + host->irq = 0; + } + ctlr->bus_num = -1; ctlr->num_chipselect = 1; ctlr->mem_ops = &hisi_sfc_v3xx_mem_ops; @@ -360,7 +478,8 @@ static int hisi_sfc_v3xx_probe(struct platform_device *pdev) if (ret) goto err_put_master; - dev_info(&pdev->dev, "hw version 0x%x\n", version); + dev_info(&pdev->dev, "hw version 0x%x, %s mode.\n", + version, host->irq ? "irq" : "polling"); return 0; diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 38a5f1304cec..060b1f5c9b04 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -1503,6 +1503,8 @@ static int spi_imx_transfer(struct spi_device *spi, { struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master); + transfer->effective_speed_hz = spi_imx->spi_bus_clk; + /* flush rxfifo before transfer */ while (spi_imx->devtype_data->rx_available(spi_imx)) readl(spi_imx->base + MXC_CSPIRXDATA); @@ -1695,7 +1697,7 @@ static int spi_imx_probe(struct platform_device *pdev) goto out_runtime_pm_put; if (ret < 0) - dev_err(&pdev->dev, "dma setup error %d, use pio\n", + dev_dbg(&pdev->dev, "dma setup error %d, use pio\n", ret); } @@ -1707,16 +1709,17 @@ static int spi_imx_probe(struct platform_device *pdev) ret = spi_bitbang_start(&spi_imx->bitbang); if (ret) { dev_err(&pdev->dev, "bitbang start failed with %d\n", ret); - goto out_runtime_pm_put; + goto out_bitbang_start; } - dev_info(&pdev->dev, "probed\n"); - pm_runtime_mark_last_busy(spi_imx->dev); pm_runtime_put_autosuspend(spi_imx->dev); return ret; +out_bitbang_start: + if (spi_imx->devtype_data->has_dmamode) + spi_imx_sdma_exit(spi_imx); out_runtime_pm_put: pm_runtime_dont_use_autosuspend(spi_imx->dev); pm_runtime_put_sync(spi_imx->dev); diff --git a/drivers/spi/spi-lantiq-ssc.c b/drivers/spi/spi-lantiq-ssc.c index 3cbecb2d8fc0..bcb52601804a 100644 --- a/drivers/spi/spi-lantiq-ssc.c +++ b/drivers/spi/spi-lantiq-ssc.c @@ -625,9 +625,8 @@ static irqreturn_t lantiq_ssc_xmit_interrupt(int irq, void *data) struct lantiq_ssc_spi *spi = data; const struct lantiq_ssc_hwcfg *hwcfg = spi->hwcfg; u32 val = lantiq_ssc_readl(spi, hwcfg->irncr); - unsigned long flags; - spin_lock_irqsave(&spi->lock, flags); + spin_lock(&spi->lock); if (hwcfg->irq_ack) lantiq_ssc_writel(spi, val, hwcfg->irncr); @@ -652,12 +651,12 @@ static irqreturn_t lantiq_ssc_xmit_interrupt(int irq, void *data) } } - spin_unlock_irqrestore(&spi->lock, flags); + spin_unlock(&spi->lock); return IRQ_HANDLED; completed: queue_work(spi->wq, &spi->work); - spin_unlock_irqrestore(&spi->lock, flags); + spin_unlock(&spi->lock); return IRQ_HANDLED; } @@ -668,12 +667,11 @@ static irqreturn_t lantiq_ssc_err_interrupt(int irq, void *data) const struct lantiq_ssc_hwcfg *hwcfg = spi->hwcfg; u32 stat = lantiq_ssc_readl(spi, LTQ_SPI_STAT); u32 val = lantiq_ssc_readl(spi, hwcfg->irncr); - unsigned long flags; if (!(stat & LTQ_SPI_STAT_ERRORS)) return IRQ_NONE; - spin_lock_irqsave(&spi->lock, flags); + spin_lock(&spi->lock); if (hwcfg->irq_ack) lantiq_ssc_writel(spi, val, hwcfg->irncr); @@ -697,7 +695,7 @@ static irqreturn_t lantiq_ssc_err_interrupt(int irq, void *data) if (spi->master->cur_msg) spi->master->cur_msg->status = -EIO; queue_work(spi->wq, &spi->work); - spin_unlock_irqrestore(&spi->lock, flags); + spin_unlock(&spi->lock); return IRQ_HANDLED; } diff --git a/drivers/spi/spi-mtk-nor.c b/drivers/spi/spi-mtk-nor.c index b08d8e9a8ee9..b97f26a60cbe 100644 --- a/drivers/spi/spi-mtk-nor.c +++ b/drivers/spi/spi-mtk-nor.c @@ -14,6 +14,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/of_device.h> +#include <linux/pm_runtime.h> #include <linux/spi/spi.h> #include <linux/spi/spi-mem.h> #include <linux/string.h> @@ -27,6 +28,7 @@ #define MTK_NOR_CMD_MASK GENMASK(5, 0) #define MTK_NOR_REG_PRG_CNT 0x04 +#define MTK_NOR_PRG_CNT_MAX 56 #define MTK_NOR_REG_RDATA 0x0c #define MTK_NOR_REG_RADR0 0x10 @@ -78,6 +80,8 @@ #define MTK_NOR_REG_DMA_FADR 0x71c #define MTK_NOR_REG_DMA_DADR 0x720 #define MTK_NOR_REG_DMA_END_DADR 0x724 +#define MTK_NOR_REG_DMA_DADR_HB 0x738 +#define MTK_NOR_REG_DMA_END_DADR_HB 0x73c #define MTK_NOR_PRG_MAX_SIZE 6 // Reading DMA src/dst addresses have to be 16-byte aligned @@ -89,18 +93,20 @@ // Buffered page program can do one 128-byte transfer #define MTK_NOR_PP_SIZE 128 -#define CLK_TO_US(sp, clkcnt) ((clkcnt) * 1000000 / sp->spi_freq) +#define CLK_TO_US(sp, clkcnt) DIV_ROUND_UP(clkcnt, sp->spi_freq / 1000000) struct mtk_nor { struct spi_controller *ctlr; struct device *dev; void __iomem *base; u8 *buffer; + dma_addr_t buffer_dma; struct clk *spi_clk; struct clk *ctlr_clk; unsigned int spi_freq; bool wbuf_en; bool has_irq; + bool high_dma; struct completion op_done; }; @@ -144,6 +150,11 @@ static void mtk_nor_set_addr(struct mtk_nor *sp, const struct spi_mem_op *op) } } +static bool need_bounce(struct mtk_nor *sp, const struct spi_mem_op *op) +{ + return ((uintptr_t)op->data.buf.in & MTK_NOR_DMA_ALIGN_MASK); +} + static bool mtk_nor_match_read(const struct spi_mem_op *op) { int dummy = 0; @@ -167,9 +178,77 @@ static bool mtk_nor_match_read(const struct spi_mem_op *op) return false; } +static bool mtk_nor_match_prg(const struct spi_mem_op *op) +{ + int tx_len, rx_len, prg_len, prg_left; + + // prg mode is spi-only. + if ((op->cmd.buswidth > 1) || (op->addr.buswidth > 1) || + (op->dummy.buswidth > 1) || (op->data.buswidth > 1)) + return false; + + tx_len = op->cmd.nbytes + op->addr.nbytes; + + if (op->data.dir == SPI_MEM_DATA_OUT) { + // count dummy bytes only if we need to write data after it + tx_len += op->dummy.nbytes; + + // leave at least one byte for data + if (tx_len > MTK_NOR_REG_PRGDATA_MAX) + return false; + + // if there's no addr, meaning adjust_op_size is impossible, + // check data length as well. + if ((!op->addr.nbytes) && + (tx_len + op->data.nbytes > MTK_NOR_REG_PRGDATA_MAX + 1)) + return false; + } else if (op->data.dir == SPI_MEM_DATA_IN) { + if (tx_len > MTK_NOR_REG_PRGDATA_MAX + 1) + return false; + + rx_len = op->data.nbytes; + prg_left = MTK_NOR_PRG_CNT_MAX / 8 - tx_len - op->dummy.nbytes; + if (prg_left > MTK_NOR_REG_SHIFT_MAX + 1) + prg_left = MTK_NOR_REG_SHIFT_MAX + 1; + if (rx_len > prg_left) { + if (!op->addr.nbytes) + return false; + rx_len = prg_left; + } + + prg_len = tx_len + op->dummy.nbytes + rx_len; + if (prg_len > MTK_NOR_PRG_CNT_MAX / 8) + return false; + } else { + prg_len = tx_len + op->dummy.nbytes; + if (prg_len > MTK_NOR_PRG_CNT_MAX / 8) + return false; + } + return true; +} + +static void mtk_nor_adj_prg_size(struct spi_mem_op *op) +{ + int tx_len, tx_left, prg_left; + + tx_len = op->cmd.nbytes + op->addr.nbytes; + if (op->data.dir == SPI_MEM_DATA_OUT) { + tx_len += op->dummy.nbytes; + tx_left = MTK_NOR_REG_PRGDATA_MAX + 1 - tx_len; + if (op->data.nbytes > tx_left) + op->data.nbytes = tx_left; + } else if (op->data.dir == SPI_MEM_DATA_IN) { + prg_left = MTK_NOR_PRG_CNT_MAX / 8 - tx_len - op->dummy.nbytes; + if (prg_left > MTK_NOR_REG_SHIFT_MAX + 1) + prg_left = MTK_NOR_REG_SHIFT_MAX + 1; + if (op->data.nbytes > prg_left) + op->data.nbytes = prg_left; + } +} + static int mtk_nor_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op) { - size_t len; + struct mtk_nor *sp = spi_controller_get_devdata(mem->spi->master); if (!op->data.nbytes) return 0; @@ -177,11 +256,14 @@ static int mtk_nor_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op) if ((op->addr.nbytes == 3) || (op->addr.nbytes == 4)) { if ((op->data.dir == SPI_MEM_DATA_IN) && mtk_nor_match_read(op)) { + // limit size to prevent timeout calculation overflow + if (op->data.nbytes > 0x400000) + op->data.nbytes = 0x400000; + if ((op->addr.val & MTK_NOR_DMA_ALIGN_MASK) || (op->data.nbytes < MTK_NOR_DMA_ALIGN)) op->data.nbytes = 1; - else if (!((ulong)(op->data.buf.in) & - MTK_NOR_DMA_ALIGN_MASK)) + else if (!need_bounce(sp, op)) op->data.nbytes &= ~MTK_NOR_DMA_ALIGN_MASK; else if (op->data.nbytes > MTK_NOR_BOUNCE_BUF_SIZE) op->data.nbytes = MTK_NOR_BOUNCE_BUF_SIZE; @@ -195,41 +277,37 @@ static int mtk_nor_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op) } } - len = MTK_NOR_PRG_MAX_SIZE - op->cmd.nbytes - op->addr.nbytes - - op->dummy.nbytes; - if (op->data.nbytes > len) - op->data.nbytes = len; - + mtk_nor_adj_prg_size(op); return 0; } static bool mtk_nor_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) { - size_t len; - - if (op->cmd.buswidth != 1) + if (!spi_mem_default_supports_op(mem, op)) return false; - /* DTR ops not supported. */ - if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr) - return false; - if (op->cmd.nbytes != 1) + if (op->cmd.buswidth != 1) return false; if ((op->addr.nbytes == 3) || (op->addr.nbytes == 4)) { - if ((op->data.dir == SPI_MEM_DATA_IN) && mtk_nor_match_read(op)) - return true; - else if (op->data.dir == SPI_MEM_DATA_OUT) - return (op->addr.buswidth == 1) && - (op->dummy.buswidth == 0) && - (op->data.buswidth == 1); + switch(op->data.dir) { + case SPI_MEM_DATA_IN: + if (mtk_nor_match_read(op)) + return true; + break; + case SPI_MEM_DATA_OUT: + if ((op->addr.buswidth == 1) && + (op->dummy.nbytes == 0) && + (op->data.buswidth == 1)) + return true; + break; + default: + break; + } } - len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes; - if ((len > MTK_NOR_PRG_MAX_SIZE) || - ((op->data.nbytes) && (len == MTK_NOR_PRG_MAX_SIZE))) - return false; - return true; + + return mtk_nor_match_prg(op); } static void mtk_nor_setup_bus(struct mtk_nor *sp, const struct spi_mem_op *op) @@ -258,24 +336,24 @@ static void mtk_nor_setup_bus(struct mtk_nor *sp, const struct spi_mem_op *op) mtk_nor_rmw(sp, MTK_NOR_REG_BUSCFG, reg, MTK_NOR_BUS_MODE_MASK); } -static int mtk_nor_read_dma(struct mtk_nor *sp, u32 from, unsigned int length, - u8 *buffer) +static int mtk_nor_dma_exec(struct mtk_nor *sp, u32 from, unsigned int length, + dma_addr_t dma_addr) { int ret = 0; ulong delay; u32 reg; - dma_addr_t dma_addr; - - dma_addr = dma_map_single(sp->dev, buffer, length, DMA_FROM_DEVICE); - if (dma_mapping_error(sp->dev, dma_addr)) { - dev_err(sp->dev, "failed to map dma buffer.\n"); - return -EINVAL; - } writel(from, sp->base + MTK_NOR_REG_DMA_FADR); writel(dma_addr, sp->base + MTK_NOR_REG_DMA_DADR); writel(dma_addr + length, sp->base + MTK_NOR_REG_DMA_END_DADR); + if (sp->high_dma) { + writel(upper_32_bits(dma_addr), + sp->base + MTK_NOR_REG_DMA_DADR_HB); + writel(upper_32_bits(dma_addr + length), + sp->base + MTK_NOR_REG_DMA_END_DADR_HB); + } + if (sp->has_irq) { reinit_completion(&sp->op_done); mtk_nor_rmw(sp, MTK_NOR_REG_IRQ_EN, MTK_NOR_IRQ_DMA, 0); @@ -295,30 +373,49 @@ static int mtk_nor_read_dma(struct mtk_nor *sp, u32 from, unsigned int length, (delay + 1) * 100); } - dma_unmap_single(sp->dev, dma_addr, length, DMA_FROM_DEVICE); if (ret < 0) dev_err(sp->dev, "dma read timeout.\n"); return ret; } -static int mtk_nor_read_bounce(struct mtk_nor *sp, u32 from, - unsigned int length, u8 *buffer) +static int mtk_nor_read_bounce(struct mtk_nor *sp, const struct spi_mem_op *op) { unsigned int rdlen; int ret; - if (length & MTK_NOR_DMA_ALIGN_MASK) - rdlen = (length + MTK_NOR_DMA_ALIGN) & ~MTK_NOR_DMA_ALIGN_MASK; + if (op->data.nbytes & MTK_NOR_DMA_ALIGN_MASK) + rdlen = (op->data.nbytes + MTK_NOR_DMA_ALIGN) & ~MTK_NOR_DMA_ALIGN_MASK; else - rdlen = length; + rdlen = op->data.nbytes; - ret = mtk_nor_read_dma(sp, from, rdlen, sp->buffer); - if (ret) - return ret; + ret = mtk_nor_dma_exec(sp, op->addr.val, rdlen, sp->buffer_dma); - memcpy(buffer, sp->buffer, length); - return 0; + if (!ret) + memcpy(op->data.buf.in, sp->buffer, op->data.nbytes); + + return ret; +} + +static int mtk_nor_read_dma(struct mtk_nor *sp, const struct spi_mem_op *op) +{ + int ret; + dma_addr_t dma_addr; + + if (need_bounce(sp, op)) + return mtk_nor_read_bounce(sp, op); + + dma_addr = dma_map_single(sp->dev, op->data.buf.in, + op->data.nbytes, DMA_FROM_DEVICE); + + if (dma_mapping_error(sp->dev, dma_addr)) + return -EINVAL; + + ret = mtk_nor_dma_exec(sp, op->addr.val, op->data.nbytes, dma_addr); + + dma_unmap_single(sp->dev, dma_addr, op->data.nbytes, DMA_FROM_DEVICE); + + return ret; } static int mtk_nor_read_pio(struct mtk_nor *sp, const struct spi_mem_op *op) @@ -397,6 +494,83 @@ static int mtk_nor_pp_unbuffered(struct mtk_nor *sp, return mtk_nor_cmd_exec(sp, MTK_NOR_CMD_WRITE, 6 * BITS_PER_BYTE); } +static int mtk_nor_spi_mem_prg(struct mtk_nor *sp, const struct spi_mem_op *op) +{ + int rx_len = 0; + int reg_offset = MTK_NOR_REG_PRGDATA_MAX; + int tx_len, prg_len; + int i, ret; + void __iomem *reg; + u8 bufbyte; + + tx_len = op->cmd.nbytes + op->addr.nbytes; + + // count dummy bytes only if we need to write data after it + if (op->data.dir == SPI_MEM_DATA_OUT) + tx_len += op->dummy.nbytes + op->data.nbytes; + else if (op->data.dir == SPI_MEM_DATA_IN) + rx_len = op->data.nbytes; + + prg_len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes + + op->data.nbytes; + + // an invalid op may reach here if the caller calls exec_op without + // adjust_op_size. return -EINVAL instead of -ENOTSUPP so that + // spi-mem won't try this op again with generic spi transfers. + if ((tx_len > MTK_NOR_REG_PRGDATA_MAX + 1) || + (rx_len > MTK_NOR_REG_SHIFT_MAX + 1) || + (prg_len > MTK_NOR_PRG_CNT_MAX / 8)) + return -EINVAL; + + // fill tx data + for (i = op->cmd.nbytes; i > 0; i--, reg_offset--) { + reg = sp->base + MTK_NOR_REG_PRGDATA(reg_offset); + bufbyte = (op->cmd.opcode >> ((i - 1) * BITS_PER_BYTE)) & 0xff; + writeb(bufbyte, reg); + } + + for (i = op->addr.nbytes; i > 0; i--, reg_offset--) { + reg = sp->base + MTK_NOR_REG_PRGDATA(reg_offset); + bufbyte = (op->addr.val >> ((i - 1) * BITS_PER_BYTE)) & 0xff; + writeb(bufbyte, reg); + } + + if (op->data.dir == SPI_MEM_DATA_OUT) { + for (i = 0; i < op->dummy.nbytes; i++, reg_offset--) { + reg = sp->base + MTK_NOR_REG_PRGDATA(reg_offset); + writeb(0, reg); + } + + for (i = 0; i < op->data.nbytes; i++, reg_offset--) { + reg = sp->base + MTK_NOR_REG_PRGDATA(reg_offset); + writeb(((const u8 *)(op->data.buf.out))[i], reg); + } + } + + for (; reg_offset >= 0; reg_offset--) { + reg = sp->base + MTK_NOR_REG_PRGDATA(reg_offset); + writeb(0, reg); + } + + // trigger op + writel(prg_len * BITS_PER_BYTE, sp->base + MTK_NOR_REG_PRG_CNT); + ret = mtk_nor_cmd_exec(sp, MTK_NOR_CMD_PROGRAM, + prg_len * BITS_PER_BYTE); + if (ret) + return ret; + + // fetch read data + reg_offset = 0; + if (op->data.dir == SPI_MEM_DATA_IN) { + for (i = op->data.nbytes - 1; i >= 0; i--, reg_offset++) { + reg = sp->base + MTK_NOR_REG_SHIFT(reg_offset); + ((u8 *)(op->data.buf.in))[i] = readb(reg); + } + } + + return 0; +} + static int mtk_nor_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) { struct mtk_nor *sp = spi_controller_get_devdata(mem->spi->master); @@ -404,7 +578,7 @@ static int mtk_nor_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) if ((op->data.nbytes == 0) || ((op->addr.nbytes != 3) && (op->addr.nbytes != 4))) - return -ENOTSUPP; + return mtk_nor_spi_mem_prg(sp, op); if (op->data.dir == SPI_MEM_DATA_OUT) { mtk_nor_set_addr(sp, op); @@ -422,19 +596,12 @@ static int mtk_nor_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) if (op->data.nbytes == 1) { mtk_nor_set_addr(sp, op); return mtk_nor_read_pio(sp, op); - } else if (((ulong)(op->data.buf.in) & - MTK_NOR_DMA_ALIGN_MASK)) { - return mtk_nor_read_bounce(sp, op->addr.val, - op->data.nbytes, - op->data.buf.in); } else { - return mtk_nor_read_dma(sp, op->addr.val, - op->data.nbytes, - op->data.buf.in); + return mtk_nor_read_dma(sp, op); } } - return -ENOTSUPP; + return mtk_nor_spi_mem_prg(sp, op); } static int mtk_nor_setup(struct spi_device *spi) @@ -524,22 +691,15 @@ static int mtk_nor_enable_clk(struct mtk_nor *sp) return 0; } -static int mtk_nor_init(struct mtk_nor *sp) +static void mtk_nor_init(struct mtk_nor *sp) { - int ret; - - ret = mtk_nor_enable_clk(sp); - if (ret) - return ret; - - sp->spi_freq = clk_get_rate(sp->spi_clk); + writel(0, sp->base + MTK_NOR_REG_IRQ_EN); + writel(MTK_NOR_IRQ_MASK, sp->base + MTK_NOR_REG_IRQ_STAT); writel(MTK_NOR_ENABLE_SF_CMD, sp->base + MTK_NOR_REG_WP); mtk_nor_rmw(sp, MTK_NOR_REG_CFG2, MTK_NOR_WR_CUSTOM_OP_EN, 0); mtk_nor_rmw(sp, MTK_NOR_REG_CFG3, MTK_NOR_DISABLE_WREN | MTK_NOR_DISABLE_SR_POLL, 0); - - return ret; } static irqreturn_t mtk_nor_irq_handler(int irq, void *data) @@ -575,7 +735,8 @@ static const struct spi_controller_mem_ops mtk_nor_mem_ops = { }; static const struct of_device_id mtk_nor_match[] = { - { .compatible = "mediatek,mt8173-nor" }, + { .compatible = "mediatek,mt8192-nor", .data = (void *)36 }, + { .compatible = "mediatek,mt8173-nor", .data = (void *)32 }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, mtk_nor_match); @@ -585,9 +746,9 @@ static int mtk_nor_probe(struct platform_device *pdev) struct spi_controller *ctlr; struct mtk_nor *sp; void __iomem *base; - u8 *buffer; struct clk *spi_clk, *ctlr_clk; int ret, irq; + unsigned long dma_bits; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) @@ -601,15 +762,11 @@ static int mtk_nor_probe(struct platform_device *pdev) if (IS_ERR(ctlr_clk)) return PTR_ERR(ctlr_clk); - buffer = devm_kmalloc(&pdev->dev, - MTK_NOR_BOUNCE_BUF_SIZE + MTK_NOR_DMA_ALIGN, - GFP_KERNEL); - if (!buffer) - return -ENOMEM; - - if ((ulong)buffer & MTK_NOR_DMA_ALIGN_MASK) - buffer = (u8 *)(((ulong)buffer + MTK_NOR_DMA_ALIGN) & - ~MTK_NOR_DMA_ALIGN_MASK); + dma_bits = (unsigned long)of_device_get_match_data(&pdev->dev); + if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_bits))) { + dev_err(&pdev->dev, "failed to set dma mask(%lu)\n", dma_bits); + return -EINVAL; + } ctlr = spi_alloc_master(&pdev->dev, sizeof(*sp)); if (!ctlr) { @@ -625,25 +782,43 @@ static int mtk_nor_probe(struct platform_device *pdev) ctlr->num_chipselect = 1; ctlr->setup = mtk_nor_setup; ctlr->transfer_one_message = mtk_nor_transfer_one_message; + ctlr->auto_runtime_pm = true; dev_set_drvdata(&pdev->dev, ctlr); sp = spi_controller_get_devdata(ctlr); sp->base = base; - sp->buffer = buffer; sp->has_irq = false; sp->wbuf_en = false; sp->ctlr = ctlr; sp->dev = &pdev->dev; sp->spi_clk = spi_clk; sp->ctlr_clk = ctlr_clk; + sp->high_dma = (dma_bits > 32); + sp->buffer = dmam_alloc_coherent(&pdev->dev, + MTK_NOR_BOUNCE_BUF_SIZE + MTK_NOR_DMA_ALIGN, + &sp->buffer_dma, GFP_KERNEL); + if (!sp->buffer) + return -ENOMEM; + + if ((uintptr_t)sp->buffer & MTK_NOR_DMA_ALIGN_MASK) { + dev_err(sp->dev, "misaligned allocation of internal buffer.\n"); + return -ENOMEM; + } + + ret = mtk_nor_enable_clk(sp); + if (ret < 0) + return ret; + + sp->spi_freq = clk_get_rate(sp->spi_clk); + + mtk_nor_init(sp); irq = platform_get_irq_optional(pdev, 0); + if (irq < 0) { dev_warn(sp->dev, "IRQ not available."); } else { - writel(MTK_NOR_IRQ_MASK, base + MTK_NOR_REG_IRQ_STAT); - writel(0, base + MTK_NOR_REG_IRQ_EN); ret = devm_request_irq(sp->dev, irq, mtk_nor_irq_handler, 0, pdev->name, sp); if (ret < 0) { @@ -654,34 +829,86 @@ static int mtk_nor_probe(struct platform_device *pdev) } } - ret = mtk_nor_init(sp); - if (ret < 0) { - kfree(ctlr); - return ret; - } + pm_runtime_set_autosuspend_delay(&pdev->dev, -1); + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + pm_runtime_get_noresume(&pdev->dev); + + ret = devm_spi_register_controller(&pdev->dev, ctlr); + if (ret < 0) + goto err_probe; + + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_put_autosuspend(&pdev->dev); dev_info(&pdev->dev, "spi frequency: %d Hz\n", sp->spi_freq); - return devm_spi_register_controller(&pdev->dev, ctlr); + return 0; + +err_probe: + pm_runtime_disable(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); + pm_runtime_dont_use_autosuspend(&pdev->dev); + + mtk_nor_disable_clk(sp); + + return ret; } static int mtk_nor_remove(struct platform_device *pdev) { - struct spi_controller *ctlr; - struct mtk_nor *sp; + struct spi_controller *ctlr = dev_get_drvdata(&pdev->dev); + struct mtk_nor *sp = spi_controller_get_devdata(ctlr); - ctlr = dev_get_drvdata(&pdev->dev); - sp = spi_controller_get_devdata(ctlr); + pm_runtime_disable(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); + pm_runtime_dont_use_autosuspend(&pdev->dev); mtk_nor_disable_clk(sp); return 0; } +static int __maybe_unused mtk_nor_runtime_suspend(struct device *dev) +{ + struct spi_controller *ctlr = dev_get_drvdata(dev); + struct mtk_nor *sp = spi_controller_get_devdata(ctlr); + + mtk_nor_disable_clk(sp); + + return 0; +} + +static int __maybe_unused mtk_nor_runtime_resume(struct device *dev) +{ + struct spi_controller *ctlr = dev_get_drvdata(dev); + struct mtk_nor *sp = spi_controller_get_devdata(ctlr); + + return mtk_nor_enable_clk(sp); +} + +static int __maybe_unused mtk_nor_suspend(struct device *dev) +{ + return pm_runtime_force_suspend(dev); +} + +static int __maybe_unused mtk_nor_resume(struct device *dev) +{ + return pm_runtime_force_resume(dev); +} + +static const struct dev_pm_ops mtk_nor_pm_ops = { + SET_RUNTIME_PM_OPS(mtk_nor_runtime_suspend, + mtk_nor_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(mtk_nor_suspend, mtk_nor_resume) +}; + static struct platform_driver mtk_nor_driver = { .driver = { .name = DRIVER_NAME, .of_match_table = mtk_nor_match, + .pm = &mtk_nor_pm_ops, }, .probe = mtk_nor_probe, .remove = mtk_nor_remove, diff --git a/drivers/spi/spi-mux.c b/drivers/spi/spi-mux.c index cc9ef371db14..37dfc6e82804 100644 --- a/drivers/spi/spi-mux.c +++ b/drivers/spi/spi-mux.c @@ -139,9 +139,8 @@ static int spi_mux_probe(struct spi_device *spi) priv->mux = devm_mux_control_get(&spi->dev, NULL); if (IS_ERR(priv->mux)) { - ret = PTR_ERR(priv->mux); - if (ret != -EPROBE_DEFER) - dev_err(&spi->dev, "failed to get control-mux\n"); + ret = dev_err_probe(&spi->dev, PTR_ERR(priv->mux), + "failed to get control-mux\n"); goto err_put_ctlr; } diff --git a/drivers/spi/spi-npcm-fiu.c b/drivers/spi/spi-npcm-fiu.c index 9468e71f03ad..341f7cffeaac 100644 --- a/drivers/spi/spi-npcm-fiu.c +++ b/drivers/spi/spi-npcm-fiu.c @@ -677,7 +677,6 @@ static int npcm_fiu_probe(struct platform_device *pdev) struct npcm_fiu_spi *fiu; void __iomem *regbase; struct resource *res; - int ret; int id; ctrl = spi_alloc_master(dev, sizeof(*fiu)); @@ -736,11 +735,7 @@ static int npcm_fiu_probe(struct platform_device *pdev) ctrl->num_chipselect = fiu->info->max_cs; ctrl->dev.of_node = dev->of_node; - ret = devm_spi_register_master(dev, ctrl); - if (ret) - return ret; - - return 0; + return devm_spi_register_master(dev, ctrl); } static int npcm_fiu_remove(struct platform_device *pdev) diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c index 1ccda82da206..0d41406c036d 100644 --- a/drivers/spi/spi-nxp-fspi.c +++ b/drivers/spi/spi-nxp-fspi.c @@ -3,7 +3,8 @@ /* * NXP FlexSPI(FSPI) controller driver. * - * Copyright 2019 NXP. + * Copyright 2019-2020 NXP + * Copyright 2020 Puresoftware Ltd. * * FlexSPI is a flexsible SPI host controller which supports two SPI * channels and up to 4 external devices. Each channel supports @@ -30,6 +31,7 @@ * Frieder Schrempf <frieder.schrempf@kontron.de> */ +#include <linux/acpi.h> #include <linux/bitops.h> #include <linux/clk.h> #include <linux/completion.h> @@ -563,6 +565,9 @@ static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f) { int ret; + if (is_acpi_node(f->dev->fwnode)) + return 0; + ret = clk_prepare_enable(f->clk_en); if (ret) return ret; @@ -576,10 +581,15 @@ static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f) return 0; } -static void nxp_fspi_clk_disable_unprep(struct nxp_fspi *f) +static int nxp_fspi_clk_disable_unprep(struct nxp_fspi *f) { + if (is_acpi_node(f->dev->fwnode)) + return 0; + clk_disable_unprepare(f->clk); clk_disable_unprepare(f->clk_en); + + return 0; } /* @@ -1001,7 +1011,7 @@ static int nxp_fspi_probe(struct platform_device *pdev) f = spi_controller_get_devdata(ctlr); f->dev = dev; - f->devtype_data = of_device_get_match_data(dev); + f->devtype_data = device_get_match_data(dev); if (!f->devtype_data) { ret = -ENODEV; goto err_put_ctrl; @@ -1010,7 +1020,12 @@ static int nxp_fspi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, f); /* find the resources - configuration register address space */ - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fspi_base"); + if (is_acpi_node(f->dev->fwnode)) + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + else + res = platform_get_resource_byname(pdev, + IORESOURCE_MEM, "fspi_base"); + f->iobase = devm_ioremap_resource(dev, res); if (IS_ERR(f->iobase)) { ret = PTR_ERR(f->iobase); @@ -1018,7 +1033,12 @@ static int nxp_fspi_probe(struct platform_device *pdev) } /* find the resources - controller memory mapped space */ - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fspi_mmap"); + if (is_acpi_node(f->dev->fwnode)) + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + else + res = platform_get_resource_byname(pdev, + IORESOURCE_MEM, "fspi_mmap"); + if (!res) { ret = -ENODEV; goto err_put_ctrl; @@ -1029,22 +1049,24 @@ static int nxp_fspi_probe(struct platform_device *pdev) f->memmap_phy_size = resource_size(res); /* find the clocks */ - f->clk_en = devm_clk_get(dev, "fspi_en"); - if (IS_ERR(f->clk_en)) { - ret = PTR_ERR(f->clk_en); - goto err_put_ctrl; - } + if (dev_of_node(&pdev->dev)) { + f->clk_en = devm_clk_get(dev, "fspi_en"); + if (IS_ERR(f->clk_en)) { + ret = PTR_ERR(f->clk_en); + goto err_put_ctrl; + } - f->clk = devm_clk_get(dev, "fspi"); - if (IS_ERR(f->clk)) { - ret = PTR_ERR(f->clk); - goto err_put_ctrl; - } + f->clk = devm_clk_get(dev, "fspi"); + if (IS_ERR(f->clk)) { + ret = PTR_ERR(f->clk); + goto err_put_ctrl; + } - ret = nxp_fspi_clk_prep_enable(f); - if (ret) { - dev_err(dev, "can not enable the clock\n"); - goto err_put_ctrl; + ret = nxp_fspi_clk_prep_enable(f); + if (ret) { + dev_err(dev, "can not enable the clock\n"); + goto err_put_ctrl; + } } /* find the irq */ @@ -1127,6 +1149,14 @@ static const struct of_device_id nxp_fspi_dt_ids[] = { }; MODULE_DEVICE_TABLE(of, nxp_fspi_dt_ids); +#ifdef CONFIG_ACPI +static const struct acpi_device_id nxp_fspi_acpi_ids[] = { + { "NXP0009", .driver_data = (kernel_ulong_t)&lx2160a_data, }, + {} +}; +MODULE_DEVICE_TABLE(acpi, nxp_fspi_acpi_ids); +#endif + static const struct dev_pm_ops nxp_fspi_pm_ops = { .suspend = nxp_fspi_suspend, .resume = nxp_fspi_resume, @@ -1136,6 +1166,7 @@ static struct platform_driver nxp_fspi_driver = { .driver = { .name = "nxp-fspi", .of_match_table = nxp_fspi_dt_ids, + .acpi_match_table = ACPI_PTR(nxp_fspi_acpi_ids), .pm = &nxp_fspi_pm_ops, }, .probe = nxp_fspi_probe, diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 1c9478e6e5d9..d4c9510af393 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -24,7 +24,6 @@ #include <linux/of.h> #include <linux/of_device.h> #include <linux/gcd.h> -#include <linux/iopoll.h> #include <linux/spi/spi.h> @@ -348,9 +347,19 @@ disable_fifo: static int mcspi_wait_for_reg_bit(void __iomem *reg, unsigned long bit) { - u32 val; - - return readl_poll_timeout(reg, val, val & bit, 1, MSEC_PER_SEC); + unsigned long timeout; + + timeout = jiffies + msecs_to_jiffies(1000); + while (!(readl_relaxed(reg) & bit)) { + if (time_after(jiffies, timeout)) { + if (!(readl_relaxed(reg) & bit)) + return -ETIMEDOUT; + else + return 0; + } + cpu_relax(); + } + return 0; } static int mcspi_wait_for_completion(struct omap2_mcspi *mcspi, diff --git a/drivers/spi/spi-qcom-qspi.c b/drivers/spi/spi-qcom-qspi.c index b8857a97f40a..5eed88af6899 100644 --- a/drivers/spi/spi-qcom-qspi.c +++ b/drivers/spi/spi-qcom-qspi.c @@ -143,7 +143,6 @@ struct qcom_qspi { struct qspi_xfer xfer; struct icc_path *icc_path_cpu_to_qspi; struct opp_table *opp_table; - bool has_opp_table; unsigned long last_speed; /* Lock to protect data accessed by IRQs */ spinlock_t lock; @@ -421,9 +420,8 @@ static irqreturn_t qcom_qspi_irq(int irq, void *dev_id) u32 int_status; struct qcom_qspi *ctrl = dev_id; irqreturn_t ret = IRQ_NONE; - unsigned long flags; - spin_lock_irqsave(&ctrl->lock, flags); + spin_lock(&ctrl->lock); int_status = readl(ctrl->base + MSTR_INT_STATUS); writel(int_status, ctrl->base + MSTR_INT_STATUS); @@ -451,7 +449,7 @@ static irqreturn_t qcom_qspi_irq(int irq, void *dev_id) spi_finalize_current_transfer(dev_get_drvdata(ctrl->dev)); } - spin_unlock_irqrestore(&ctrl->lock, flags); + spin_unlock(&ctrl->lock); return ret; } @@ -495,9 +493,8 @@ static int qcom_qspi_probe(struct platform_device *pdev) ctrl->icc_path_cpu_to_qspi = devm_of_icc_get(dev, "qspi-config"); if (IS_ERR(ctrl->icc_path_cpu_to_qspi)) { - ret = PTR_ERR(ctrl->icc_path_cpu_to_qspi); - if (ret != -EPROBE_DEFER) - dev_err(dev, "Failed to get cpu path: %d\n", ret); + ret = dev_err_probe(dev, PTR_ERR(ctrl->icc_path_cpu_to_qspi), + "Failed to get cpu path\n"); goto exit_probe_master_put; } /* Set BW vote for register access */ @@ -546,11 +543,9 @@ static int qcom_qspi_probe(struct platform_device *pdev) } /* OPP table is optional */ ret = dev_pm_opp_of_add_table(&pdev->dev); - if (!ret) { - ctrl->has_opp_table = true; - } else if (ret != -ENODEV) { + if (ret && ret != -ENODEV) { dev_err(&pdev->dev, "invalid OPP table in device tree\n"); - goto exit_probe_master_put; + goto exit_probe_put_clkname; } pm_runtime_use_autosuspend(dev); @@ -562,8 +557,9 @@ static int qcom_qspi_probe(struct platform_device *pdev) return 0; pm_runtime_disable(dev); - if (ctrl->has_opp_table) - dev_pm_opp_of_remove_table(&pdev->dev); + dev_pm_opp_of_remove_table(&pdev->dev); + +exit_probe_put_clkname: dev_pm_opp_put_clkname(ctrl->opp_table); exit_probe_master_put: @@ -581,8 +577,7 @@ static int qcom_qspi_remove(struct platform_device *pdev) spi_unregister_master(master); pm_runtime_disable(&pdev->dev); - if (ctrl->has_opp_table) - dev_pm_opp_of_remove_table(&pdev->dev); + dev_pm_opp_of_remove_table(&pdev->dev); dev_pm_opp_put_clkname(ctrl->opp_table); return 0; diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index a364b99497e2..8dcb2e70735c 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -848,7 +848,7 @@ static int spi_qup_transfer_one(struct spi_master *master, { struct spi_qup *controller = spi_master_get_devdata(master); unsigned long timeout, flags; - int ret = -EIO; + int ret; ret = spi_qup_io_prep(spi, xfer); if (ret) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index cbc2387d450c..e39fd38f5180 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -161,6 +161,7 @@ #define SPCMD_SPRW 0x0010 /* SPI Read/Write Access (Dual/Quad) */ #define SPCMD_SSLA(i) ((i) << 4) /* SSL Assert Signal Setting */ #define SPCMD_BRDV_MASK 0x000c /* Bit Rate Division Setting */ +#define SPCMD_BRDV(brdv) ((brdv) << 2) #define SPCMD_CPOL 0x0002 /* Clock Polarity Setting */ #define SPCMD_CPHA 0x0001 /* Clock Phase Setting */ @@ -242,24 +243,40 @@ struct spi_ops { int (*transfer_one)(struct spi_controller *ctlr, struct spi_device *spi, struct spi_transfer *xfer); u16 extra_mode_bits; + u16 min_div; + u16 max_div; u16 flags; u16 fifo_size; u8 num_hw_ss; }; +static void rspi_set_rate(struct rspi_data *rspi) +{ + unsigned long clksrc; + int brdv = 0, spbr; + + clksrc = clk_get_rate(rspi->clk); + spbr = DIV_ROUND_UP(clksrc, 2 * rspi->speed_hz) - 1; + while (spbr > 255 && brdv < 3) { + brdv++; + spbr = DIV_ROUND_UP(spbr + 1, 2) - 1; + } + + rspi_write8(rspi, clamp(spbr, 0, 255), RSPI_SPBR); + rspi->spcmd |= SPCMD_BRDV(brdv); + rspi->speed_hz = DIV_ROUND_UP(clksrc, (2U << brdv) * (spbr + 1)); +} + /* * functions for RSPI on legacy SH */ static int rspi_set_config_register(struct rspi_data *rspi, int access_size) { - int spbr; - /* Sets output mode, MOSI signal, and (optionally) loopback */ rspi_write8(rspi, rspi->sppcr, RSPI_SPPCR); /* Sets transfer bit rate */ - spbr = DIV_ROUND_UP(clk_get_rate(rspi->clk), 2 * rspi->speed_hz) - 1; - rspi_write8(rspi, clamp(spbr, 0, 255), RSPI_SPBR); + rspi_set_rate(rspi); /* Disable dummy transmission, set 16-bit word access, 1 frame */ rspi_write8(rspi, 0, RSPI_SPDCR); @@ -289,25 +306,11 @@ static int rspi_set_config_register(struct rspi_data *rspi, int access_size) */ static int rspi_rz_set_config_register(struct rspi_data *rspi, int access_size) { - int spbr; - int div = 0; - unsigned long clksrc; - /* Sets output mode, MOSI signal, and (optionally) loopback */ rspi_write8(rspi, rspi->sppcr, RSPI_SPPCR); - clksrc = clk_get_rate(rspi->clk); - while (div < 3) { - if (rspi->speed_hz >= clksrc/4) /* 4=(CLK/2)/2 */ - break; - div++; - clksrc /= 2; - } - /* Sets transfer bit rate */ - spbr = DIV_ROUND_UP(clksrc, 2 * rspi->speed_hz) - 1; - rspi_write8(rspi, clamp(spbr, 0, 255), RSPI_SPBR); - rspi->spcmd |= div << 2; + rspi_set_rate(rspi); /* Disable dummy transmission, set byte access */ rspi_write8(rspi, SPDCR_SPLBYTE, RSPI_SPDCR); @@ -334,14 +337,28 @@ static int rspi_rz_set_config_register(struct rspi_data *rspi, int access_size) */ static int qspi_set_config_register(struct rspi_data *rspi, int access_size) { - int spbr; + unsigned long clksrc; + int brdv = 0, spbr; /* Sets output mode, MOSI signal, and (optionally) loopback */ rspi_write8(rspi, rspi->sppcr, RSPI_SPPCR); /* Sets transfer bit rate */ - spbr = DIV_ROUND_UP(clk_get_rate(rspi->clk), 2 * rspi->speed_hz); - rspi_write8(rspi, clamp(spbr, 0, 255), RSPI_SPBR); + clksrc = clk_get_rate(rspi->clk); + if (rspi->speed_hz >= clksrc) { + spbr = 0; + rspi->speed_hz = clksrc; + } else { + spbr = DIV_ROUND_UP(clksrc, 2 * rspi->speed_hz); + while (spbr > 255 && brdv < 3) { + brdv++; + spbr = DIV_ROUND_UP(spbr, 2); + } + spbr = clamp(spbr, 0, 255); + rspi->speed_hz = DIV_ROUND_UP(clksrc, (2U << brdv) * spbr); + } + rspi_write8(rspi, spbr, RSPI_SPBR); + rspi->spcmd |= SPCMD_BRDV(brdv); /* Disable dummy transmission, set byte access */ rspi_write8(rspi, 0, RSPI_SPDCR); @@ -686,6 +703,8 @@ static int rspi_common_transfer(struct rspi_data *rspi, { int ret; + xfer->effective_speed_hz = rspi->speed_hz; + ret = rspi_dma_check_then_transfer(rspi, xfer); if (ret != -EAGAIN) return ret; @@ -841,6 +860,7 @@ static int qspi_transfer_one(struct spi_controller *ctlr, { struct rspi_data *rspi = spi_controller_get_devdata(ctlr); + xfer->effective_speed_hz = rspi->speed_hz; if (spi->mode & SPI_LOOP) { return qspi_transfer_out_in(rspi, xfer); } else if (xfer->tx_nbits > SPI_NBITS_SINGLE) { @@ -1163,6 +1183,8 @@ static int rspi_remove(struct platform_device *pdev) static const struct spi_ops rspi_ops = { .set_config_register = rspi_set_config_register, .transfer_one = rspi_transfer_one, + .min_div = 2, + .max_div = 4096, .flags = SPI_CONTROLLER_MUST_TX, .fifo_size = 8, .num_hw_ss = 2, @@ -1171,6 +1193,8 @@ static const struct spi_ops rspi_ops = { static const struct spi_ops rspi_rz_ops = { .set_config_register = rspi_rz_set_config_register, .transfer_one = rspi_rz_transfer_one, + .min_div = 2, + .max_div = 4096, .flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX, .fifo_size = 8, /* 8 for TX, 32 for RX */ .num_hw_ss = 1, @@ -1181,6 +1205,8 @@ static const struct spi_ops qspi_ops = { .transfer_one = qspi_transfer_one, .extra_mode_bits = SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD, + .min_div = 1, + .max_div = 4080, .flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX, .fifo_size = 32, .num_hw_ss = 1, @@ -1242,6 +1268,7 @@ static int rspi_probe(struct platform_device *pdev) int ret; const struct rspi_plat_data *rspi_pd; const struct spi_ops *ops; + unsigned long clksrc; ctlr = spi_alloc_master(&pdev->dev, sizeof(struct rspi_data)); if (ctlr == NULL) @@ -1261,13 +1288,6 @@ static int rspi_probe(struct platform_device *pdev) ctlr->num_chipselect = 2; /* default */ } - /* ops parameter check */ - if (!ops->set_config_register) { - dev_err(&pdev->dev, "there is no set_config_register\n"); - ret = -ENODEV; - goto error1; - } - rspi = spi_controller_get_devdata(ctlr); platform_set_drvdata(pdev, rspi); rspi->ops = ops; @@ -1301,6 +1321,9 @@ static int rspi_probe(struct platform_device *pdev) ctlr->unprepare_message = rspi_unprepare_message; ctlr->mode_bits = SPI_CPHA | SPI_CPOL | SPI_CS_HIGH | SPI_LSB_FIRST | SPI_LOOP | ops->extra_mode_bits; + clksrc = clk_get_rate(rspi->clk); + ctlr->min_speed_hz = DIV_ROUND_UP(clksrc, ops->max_div); + ctlr->max_speed_hz = DIV_ROUND_UP(clksrc, ops->min_div); ctlr->flags = ops->flags; ctlr->dev.of_node = pdev->dev.of_node; ctlr->use_gpio_descriptors = true; diff --git a/drivers/spi/spi-s3c24xx.c b/drivers/spi/spi-s3c24xx.c index 2cb3b611c294..7742170fca91 100644 --- a/drivers/spi/spi-s3c24xx.c +++ b/drivers/spi/spi-s3c24xx.c @@ -28,7 +28,7 @@ #include "spi-s3c24xx-fiq.h" /** - * s3c24xx_spi_devstate - per device data + * struct s3c24xx_spi_devstate - per device data * @hz: Last frequency calculated for @sppre field. * @mode: Last mode setting for the @spcon field. * @spcon: Value to write to the SPCON register. diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 924b24441789..dfa7c91e13aa 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -29,7 +29,7 @@ #define S3C64XX_SPI_CH_CFG 0x00 #define S3C64XX_SPI_CLK_CFG 0x04 #define S3C64XX_SPI_MODE_CFG 0x08 -#define S3C64XX_SPI_SLAVE_SEL 0x0C +#define S3C64XX_SPI_CS_REG 0x0C #define S3C64XX_SPI_INT_EN 0x10 #define S3C64XX_SPI_STATUS 0x14 #define S3C64XX_SPI_TX_DATA 0x18 @@ -64,9 +64,9 @@ #define S3C64XX_SPI_MODE_TXDMA_ON (1<<1) #define S3C64XX_SPI_MODE_4BURST (1<<0) -#define S3C64XX_SPI_SLAVE_AUTO (1<<1) -#define S3C64XX_SPI_SLAVE_SIG_INACT (1<<0) -#define S3C64XX_SPI_SLAVE_NSC_CNT_2 (2<<4) +#define S3C64XX_SPI_CS_NSC_CNT_2 (2<<4) +#define S3C64XX_SPI_CS_AUTO (1<<1) +#define S3C64XX_SPI_CS_SIG_INACT (1<<0) #define S3C64XX_SPI_INT_TRAILING_EN (1<<6) #define S3C64XX_SPI_INT_RX_OVERRUN_EN (1<<5) @@ -122,6 +122,7 @@ struct s3c64xx_spi_dma_data { struct dma_chan *ch; + dma_cookie_t cookie; enum dma_transfer_direction direction; }; @@ -161,11 +162,8 @@ struct s3c64xx_spi_port_config { * @cntrlr_info: Platform specific data for the controller this driver manages. * @lock: Controller specific lock. * @state: Set of FLAGS to indicate status. - * @rx_dmach: Controller's DMA channel for Rx. - * @tx_dmach: Controller's DMA channel for Tx. * @sfr_start: BUS address of SPI controller regs. * @regs: Pointer to ioremap'ed controller registers. - * @irq: interrupt * @xfer_completion: To indicate completion of xfer task. * @cur_mode: Stores the active configuration of the controller. * @cur_bpw: Stores the active bits per word settings. @@ -182,7 +180,7 @@ struct s3c64xx_spi_driver_data { struct clk *ioclk; struct platform_device *pdev; struct spi_master *master; - struct s3c64xx_spi_info *cntrlr_info; + struct s3c64xx_spi_info *cntrlr_info; spinlock_t lock; unsigned long sfr_start; struct completion xfer_completion; @@ -271,12 +269,13 @@ static void s3c64xx_spi_dmacb(void *data) spin_unlock_irqrestore(&sdd->lock, flags); } -static void prepare_dma(struct s3c64xx_spi_dma_data *dma, +static int prepare_dma(struct s3c64xx_spi_dma_data *dma, struct sg_table *sgt) { struct s3c64xx_spi_driver_data *sdd; struct dma_slave_config config; struct dma_async_tx_descriptor *desc; + int ret; memset(&config, 0, sizeof(config)); @@ -300,12 +299,24 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma, desc = dmaengine_prep_slave_sg(dma->ch, sgt->sgl, sgt->nents, dma->direction, DMA_PREP_INTERRUPT); + if (!desc) { + dev_err(&sdd->pdev->dev, "unable to prepare %s scatterlist", + dma->direction == DMA_DEV_TO_MEM ? "rx" : "tx"); + return -ENOMEM; + } desc->callback = s3c64xx_spi_dmacb; desc->callback_param = dma; - dmaengine_submit(desc); + dma->cookie = dmaengine_submit(desc); + ret = dma_submit_error(dma->cookie); + if (ret) { + dev_err(&sdd->pdev->dev, "DMA submission failed"); + return -EIO; + } + dma_async_issue_pending(dma->ch); + return 0; } static void s3c64xx_spi_set_cs(struct spi_device *spi, bool enable) @@ -318,18 +329,18 @@ static void s3c64xx_spi_set_cs(struct spi_device *spi, bool enable) if (enable) { if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) { - writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + writel(0, sdd->regs + S3C64XX_SPI_CS_REG); } else { - u32 ssel = readl(sdd->regs + S3C64XX_SPI_SLAVE_SEL); + u32 ssel = readl(sdd->regs + S3C64XX_SPI_CS_REG); - ssel |= (S3C64XX_SPI_SLAVE_AUTO | - S3C64XX_SPI_SLAVE_NSC_CNT_2); - writel(ssel, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + ssel |= (S3C64XX_SPI_CS_AUTO | + S3C64XX_SPI_CS_NSC_CNT_2); + writel(ssel, sdd->regs + S3C64XX_SPI_CS_REG); } } else { if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) - writel(S3C64XX_SPI_SLAVE_SIG_INACT, - sdd->regs + S3C64XX_SPI_SLAVE_SEL); + writel(S3C64XX_SPI_CS_SIG_INACT, + sdd->regs + S3C64XX_SPI_CS_REG); } } @@ -355,11 +366,12 @@ static bool s3c64xx_spi_can_dma(struct spi_master *master, return xfer->len > (FIFO_LVL_MASK(sdd) >> 1) + 1; } -static void s3c64xx_enable_datapath(struct s3c64xx_spi_driver_data *sdd, +static int s3c64xx_enable_datapath(struct s3c64xx_spi_driver_data *sdd, struct spi_transfer *xfer, int dma_mode) { void __iomem *regs = sdd->regs; u32 modecfg, chcfg; + int ret = 0; modecfg = readl(regs + S3C64XX_SPI_MODE_CFG); modecfg &= ~(S3C64XX_SPI_MODE_TXDMA_ON | S3C64XX_SPI_MODE_RXDMA_ON); @@ -385,7 +397,7 @@ static void s3c64xx_enable_datapath(struct s3c64xx_spi_driver_data *sdd, chcfg |= S3C64XX_SPI_CH_TXCH_ON; if (dma_mode) { modecfg |= S3C64XX_SPI_MODE_TXDMA_ON; - prepare_dma(&sdd->tx_dma, &xfer->tx_sg); + ret = prepare_dma(&sdd->tx_dma, &xfer->tx_sg); } else { switch (sdd->cur_bpw) { case 32: @@ -417,12 +429,17 @@ static void s3c64xx_enable_datapath(struct s3c64xx_spi_driver_data *sdd, writel(((xfer->len * 8 / sdd->cur_bpw) & 0xffff) | S3C64XX_SPI_PACKET_CNT_EN, regs + S3C64XX_SPI_PACKET_CNT); - prepare_dma(&sdd->rx_dma, &xfer->rx_sg); + ret = prepare_dma(&sdd->rx_dma, &xfer->rx_sg); } } + if (ret) + return ret; + writel(modecfg, regs + S3C64XX_SPI_MODE_CFG); writel(chcfg, regs + S3C64XX_SPI_CH_CFG); + + return 0; } static u32 s3c64xx_spi_wait_for_timeout(struct s3c64xx_spi_driver_data *sdd, @@ -456,7 +473,8 @@ static int s3c64xx_wait_for_dma(struct s3c64xx_spi_driver_data *sdd, /* millisecs to xfer 'len' bytes @ 'cur_speed' */ ms = xfer->len * 8 * 1000 / sdd->cur_speed; - ms += 10; /* some tolerance */ + ms += 30; /* some tolerance */ + ms = max(ms, 100); /* minimum timeout */ val = msecs_to_jiffies(ms) + 10; val = wait_for_completion_timeout(&sdd->xfer_completion, val); @@ -555,9 +573,10 @@ static int s3c64xx_wait_for_pio(struct s3c64xx_spi_driver_data *sdd, return 0; } -static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) +static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) { void __iomem *regs = sdd->regs; + int ret; u32 val; /* Disable Clock */ @@ -605,7 +624,10 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) if (sdd->port_conf->clk_from_cmu) { /* The src_clk clock is divided internally by 2 */ - clk_set_rate(sdd->src_clk, sdd->cur_speed * 2); + ret = clk_set_rate(sdd->src_clk, sdd->cur_speed * 2); + if (ret) + return ret; + sdd->cur_speed = clk_get_rate(sdd->src_clk) / 2; } else { /* Configure Clock */ val = readl(regs + S3C64XX_SPI_CLK_CFG); @@ -619,6 +641,8 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) val |= S3C64XX_SPI_ENCLK_ENABLE; writel(val, regs + S3C64XX_SPI_CLK_CFG); } + + return 0; } #define XFER_DMAADDR_INVALID DMA_BIT_MASK(32) @@ -661,7 +685,9 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, sdd->cur_bpw = bpw; sdd->cur_speed = speed; sdd->cur_mode = spi->mode; - s3c64xx_spi_config(sdd); + status = s3c64xx_spi_config(sdd); + if (status) + return status; } if (!is_polling(sdd) && (xfer->len > fifo_len) && @@ -685,13 +711,18 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, sdd->state &= ~RXBUSY; sdd->state &= ~TXBUSY; - s3c64xx_enable_datapath(sdd, xfer, use_dma); - /* Start the signals */ s3c64xx_spi_set_cs(spi, true); + status = s3c64xx_enable_datapath(sdd, xfer, use_dma); + spin_unlock_irqrestore(&sdd->lock, flags); + if (status) { + dev_err(&spi->dev, "failed to enable data path for transfer: %d\n", status); + break; + } + if (use_dma) status = s3c64xx_wait_for_dma(sdd, xfer); else @@ -699,17 +730,28 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, if (status) { dev_err(&spi->dev, - "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n", + "I/O Error: rx-%d tx-%d rx-%c tx-%c len-%d dma-%d res-(%d)\n", xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0, (sdd->state & RXBUSY) ? 'f' : 'p', (sdd->state & TXBUSY) ? 'f' : 'p', - xfer->len); + xfer->len, use_dma ? 1 : 0, status); if (use_dma) { - if (xfer->tx_buf && (sdd->state & TXBUSY)) + struct dma_tx_state s; + + if (xfer->tx_buf && (sdd->state & TXBUSY)) { + dmaengine_pause(sdd->tx_dma.ch); + dmaengine_tx_status(sdd->tx_dma.ch, sdd->tx_dma.cookie, &s); dmaengine_terminate_all(sdd->tx_dma.ch); - if (xfer->rx_buf && (sdd->state & RXBUSY)) + dev_err(&spi->dev, "TX residue: %d\n", s.residue); + + } + if (xfer->rx_buf && (sdd->state & RXBUSY)) { + dmaengine_pause(sdd->rx_dma.ch); + dmaengine_tx_status(sdd->rx_dma.ch, sdd->rx_dma.cookie, &s); dmaengine_terminate_all(sdd->rx_dma.ch); + dev_err(&spi->dev, "RX residue: %d\n", s.residue); + } } } else { s3c64xx_flush_fifo(sdd); @@ -939,9 +981,9 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd) sdd->cur_speed = 0; if (sci->no_cs) - writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + writel(0, sdd->regs + S3C64XX_SPI_CS_REG); else if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) - writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + writel(S3C64XX_SPI_CS_SIG_INACT, sdd->regs + S3C64XX_SPI_CS_REG); /* Disable Interrupts - we use Polling if not DMA mode */ writel(0, regs + S3C64XX_SPI_INT_EN); @@ -1336,6 +1378,10 @@ static int s3c64xx_spi_runtime_resume(struct device *dev) s3c64xx_spi_hwinit(sdd); + writel(S3C64XX_SPI_INT_RX_OVERRUN_EN | S3C64XX_SPI_INT_RX_UNDERRUN_EN | + S3C64XX_SPI_INT_TX_OVERRUN_EN | S3C64XX_SPI_INT_TX_UNDERRUN_EN, + sdd->regs + S3C64XX_SPI_INT_EN); + return 0; err_disable_src_clk: @@ -1379,6 +1425,7 @@ static struct s3c64xx_spi_port_config exynos4_spi_port_config = { .tx_st_done = 25, .high_speed = true, .clk_from_cmu = true, + .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, }; static struct s3c64xx_spi_port_config exynos7_spi_port_config = { diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c index 127b8bd25831..392ec5cfa3d6 100644 --- a/drivers/spi/spi-sprd-adi.c +++ b/drivers/spi/spi-sprd-adi.c @@ -504,10 +504,7 @@ static int sprd_adi_probe(struct platform_device *pdev) dev_info(&pdev->dev, "no hardware spinlock supplied\n"); break; default: - dev_err(&pdev->dev, - "failed to find hwlock id, %d\n", ret); - fallthrough; - case -EPROBE_DEFER: + dev_err_probe(&pdev->dev, ret, "failed to find hwlock id\n"); goto put_ctlr; } } diff --git a/drivers/spi/spi-sprd.c b/drivers/spi/spi-sprd.c index 6678f1cbc566..635738f54c73 100644 --- a/drivers/spi/spi-sprd.c +++ b/drivers/spi/spi-sprd.c @@ -553,22 +553,15 @@ static int sprd_spi_dma_tx_config(struct sprd_spi *ss, struct spi_transfer *t) static int sprd_spi_dma_request(struct sprd_spi *ss) { ss->dma.dma_chan[SPRD_SPI_RX] = dma_request_chan(ss->dev, "rx_chn"); - if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_RX])) { - if (PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]) == -EPROBE_DEFER) - return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]); - - dev_err(ss->dev, "request RX DMA channel failed!\n"); - return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]); - } + if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_RX])) + return dev_err_probe(ss->dev, PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]), + "request RX DMA channel failed!\n"); ss->dma.dma_chan[SPRD_SPI_TX] = dma_request_chan(ss->dev, "tx_chn"); if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_TX])) { - if (PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]) == -EPROBE_DEFER) - return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]); - - dev_err(ss->dev, "request TX DMA channel failed!\n"); dma_release_channel(ss->dma.dma_chan[SPRD_SPI_RX]); - return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]); + return dev_err_probe(ss->dev, PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]), + "request TX DMA channel failed!\n"); } return 0; diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 3056428b09f3..2cc850eb8922 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -804,10 +804,9 @@ static irqreturn_t stm32f4_spi_irq_event(int irq, void *dev_id) struct spi_master *master = dev_id; struct stm32_spi *spi = spi_master_get_devdata(master); u32 sr, mask = 0; - unsigned long flags; bool end = false; - spin_lock_irqsave(&spi->lock, flags); + spin_lock(&spi->lock); sr = readl_relaxed(spi->base + STM32F4_SPI_SR); /* @@ -833,7 +832,7 @@ static irqreturn_t stm32f4_spi_irq_event(int irq, void *dev_id) if (!(sr & mask)) { dev_dbg(spi->dev, "spurious IT (sr=0x%08x)\n", sr); - spin_unlock_irqrestore(&spi->lock, flags); + spin_unlock(&spi->lock); return IRQ_NONE; } @@ -875,11 +874,11 @@ end_irq: STM32F4_SPI_CR2_TXEIE | STM32F4_SPI_CR2_RXNEIE | STM32F4_SPI_CR2_ERRIE); - spin_unlock_irqrestore(&spi->lock, flags); + spin_unlock(&spi->lock); return IRQ_WAKE_THREAD; } - spin_unlock_irqrestore(&spi->lock, flags); + spin_unlock(&spi->lock); return IRQ_HANDLED; } @@ -1861,9 +1860,7 @@ static int stm32_spi_probe(struct platform_device *pdev) spi->irq = platform_get_irq(pdev, 0); if (spi->irq <= 0) { - ret = spi->irq; - if (ret != -EPROBE_DEFER) - dev_err(&pdev->dev, "failed to get irq: %d\n", ret); + ret = dev_err_probe(&pdev->dev, spi->irq, "failed to get irq\n"); goto err_master_put; } ret = devm_request_threaded_irq(&pdev->dev, spi->irq, diff --git a/drivers/spi/spi-synquacer.c b/drivers/spi/spi-synquacer.c index ae17c99cce03..42e82dbe3d41 100644 --- a/drivers/spi/spi-synquacer.c +++ b/drivers/spi/spi-synquacer.c @@ -640,9 +640,8 @@ static int synquacer_spi_probe(struct platform_device *pdev) } if (IS_ERR(sspi->clk)) { - if (!(PTR_ERR(sspi->clk) == -EPROBE_DEFER)) - dev_err(&pdev->dev, "clock not found\n"); - ret = PTR_ERR(sspi->clk); + ret = dev_err_probe(&pdev->dev, PTR_ERR(sspi->clk), + "clock not found\n"); goto put_spi; } diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c index c2c58871a947..ca6886aaa519 100644 --- a/drivers/spi/spi-tegra114.c +++ b/drivers/spi/spi-tegra114.c @@ -664,16 +664,11 @@ static int tegra_spi_init_dma_param(struct tegra_spi_data *tspi, struct dma_chan *dma_chan; u32 *dma_buf; dma_addr_t dma_phys; - int ret; dma_chan = dma_request_chan(tspi->dev, dma_to_memory ? "rx" : "tx"); - if (IS_ERR(dma_chan)) { - ret = PTR_ERR(dma_chan); - if (ret != -EPROBE_DEFER) - dev_err(tspi->dev, - "Dma channel is not available: %d\n", ret); - return ret; - } + if (IS_ERR(dma_chan)) + return dev_err_probe(tspi->dev, PTR_ERR(dma_chan), + "Dma channel is not available\n"); dma_buf = dma_alloc_coherent(tspi->dev, tspi->dma_buf_size, &dma_phys, GFP_KERNEL); diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c index 02cf5f463ba6..b59015c7c8a8 100644 --- a/drivers/spi/spi-tegra20-sflash.c +++ b/drivers/spi/spi-tegra20-sflash.c @@ -359,9 +359,8 @@ exit: static irqreturn_t handle_cpu_based_xfer(struct tegra_sflash_data *tsd) { struct spi_transfer *t = tsd->curr_xfer; - unsigned long flags; - spin_lock_irqsave(&tsd->lock, flags); + spin_lock(&tsd->lock); if (tsd->tx_status || tsd->rx_status || (tsd->status_reg & SPI_BSY)) { dev_err(tsd->dev, "CpuXfer ERROR bit set 0x%x\n", tsd->status_reg); @@ -391,7 +390,7 @@ static irqreturn_t handle_cpu_based_xfer(struct tegra_sflash_data *tsd) tegra_sflash_calculate_curr_xfer_param(tsd->cur_spi, tsd, t); tegra_sflash_start_cpu_based_transfer(tsd, t); exit: - spin_unlock_irqrestore(&tsd->lock, flags); + spin_unlock(&tsd->lock); return IRQ_HANDLED; } diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c index a07b72e9c344..a0810765d4e5 100644 --- a/drivers/spi/spi-tegra20-slink.c +++ b/drivers/spi/spi-tegra20-slink.c @@ -600,13 +600,9 @@ static int tegra_slink_init_dma_param(struct tegra_slink_data *tspi, struct dma_slave_config dma_sconfig; dma_chan = dma_request_chan(tspi->dev, dma_to_memory ? "rx" : "tx"); - if (IS_ERR(dma_chan)) { - ret = PTR_ERR(dma_chan); - if (ret != -EPROBE_DEFER) - dev_err(tspi->dev, - "Dma channel is not available: %d\n", ret); - return ret; - } + if (IS_ERR(dma_chan)) + return dev_err_probe(tspi->dev, PTR_ERR(dma_chan), + "Dma channel is not available\n"); dma_buf = dma_alloc_coherent(tspi->dev, tspi->dma_buf_size, &dma_phys, GFP_KERNEL); diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 6df2aeff2843..b459e369079f 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -1002,7 +1002,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw) spin_unlock_irqrestore(&data->lock, flags); /* RX */ - dma->sg_rx_p = kcalloc(num, sizeof(*dma->sg_rx_p), GFP_ATOMIC); + dma->sg_rx_p = kmalloc_array(num, sizeof(*dma->sg_rx_p), GFP_ATOMIC); if (!dma->sg_rx_p) return; @@ -1065,7 +1065,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw) head = 0; } - dma->sg_tx_p = kcalloc(num, sizeof(*dma->sg_tx_p), GFP_ATOMIC); + dma->sg_tx_p = kmalloc_array(num, sizeof(*dma->sg_tx_p), GFP_ATOMIC); if (!dma->sg_tx_p) return; diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index 8dd2bb99cb4d..523edfdf5dcd 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -491,8 +491,7 @@ static int xilinx_spi_probe(struct platform_device *pdev) goto put_master; } - dev_info(&pdev->dev, "at 0x%08llX mapped to 0x%p, irq=%d\n", - (unsigned long long)res->start, xspi->regs, xspi->irq); + dev_info(&pdev->dev, "at %pR, irq=%d\n", res, xspi->irq); if (pdata) { for (i = 0; i < pdata->num_devices; i++) diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c index e17a20125255..c8fa6ee18ae7 100644 --- a/drivers/spi/spi-zynqmp-gqspi.c +++ b/drivers/spi/spi-zynqmp-gqspi.c @@ -21,6 +21,7 @@ #include <linux/spi/spi.h> #include <linux/spinlock.h> #include <linux/workqueue.h> +#include <linux/spi/spi-mem.h> /* Generic QSPI register offsets */ #define GQSPI_CONFIG_OFST 0x00000100 @@ -153,6 +154,7 @@ enum mode_type {GQSPI_MODE_IO, GQSPI_MODE_DMA}; * @dma_addr: DMA address after mapping the kernel buffer * @genfifoentry: Used for storing the genfifoentry instruction. * @mode: Defines the mode in which QSPI is operating + * @data_completion: completion structure */ struct zynqmp_qspi { void __iomem *regs; @@ -170,12 +172,14 @@ struct zynqmp_qspi { dma_addr_t dma_addr; u32 genfifoentry; enum mode_type mode; + struct completion data_completion; }; /** - * zynqmp_gqspi_read: For GQSPI controller read operation + * zynqmp_gqspi_read - For GQSPI controller read operation * @xqspi: Pointer to the zynqmp_qspi structure * @offset: Offset from where to read + * Return: Value at the offset */ static u32 zynqmp_gqspi_read(struct zynqmp_qspi *xqspi, u32 offset) { @@ -183,7 +187,7 @@ static u32 zynqmp_gqspi_read(struct zynqmp_qspi *xqspi, u32 offset) } /** - * zynqmp_gqspi_write: For GQSPI controller write operation + * zynqmp_gqspi_write - For GQSPI controller write operation * @xqspi: Pointer to the zynqmp_qspi structure * @offset: Offset where to write * @val: Value to be written @@ -195,7 +199,7 @@ static inline void zynqmp_gqspi_write(struct zynqmp_qspi *xqspi, u32 offset, } /** - * zynqmp_gqspi_selectslave: For selection of slave device + * zynqmp_gqspi_selectslave - For selection of slave device * @instanceptr: Pointer to the zynqmp_qspi structure * @slavecs: For chip select * @slavebus: To check which bus is selected- upper or lower @@ -242,7 +246,7 @@ static void zynqmp_gqspi_selectslave(struct zynqmp_qspi *instanceptr, } /** - * zynqmp_qspi_init_hw: Initialize the hardware + * zynqmp_qspi_init_hw - Initialize the hardware * @xqspi: Pointer to the zynqmp_qspi structure * * The default settings of the QSPI controller's configurable parameters on @@ -322,15 +326,15 @@ static void zynqmp_qspi_init_hw(struct zynqmp_qspi *xqspi) GQSPI_SELECT_FLASH_BUS_LOWER); /* Initialize DMA */ zynqmp_gqspi_write(xqspi, - GQSPI_QSPIDMA_DST_CTRL_OFST, - GQSPI_QSPIDMA_DST_CTRL_RESET_VAL); + GQSPI_QSPIDMA_DST_CTRL_OFST, + GQSPI_QSPIDMA_DST_CTRL_RESET_VAL); /* Enable the GQSPI */ zynqmp_gqspi_write(xqspi, GQSPI_EN_OFST, GQSPI_EN_MASK); } /** - * zynqmp_qspi_copy_read_data: Copy data to RX buffer + * zynqmp_qspi_copy_read_data - Copy data to RX buffer * @xqspi: Pointer to the zynqmp_qspi structure * @data: The variable where data is stored * @size: Number of bytes to be copied from data to RX buffer @@ -344,41 +348,7 @@ static void zynqmp_qspi_copy_read_data(struct zynqmp_qspi *xqspi, } /** - * zynqmp_prepare_transfer_hardware: Prepares hardware for transfer. - * @master: Pointer to the spi_master structure which provides - * information about the controller. - * - * This function enables SPI master controller. - * - * Return: 0 on success; error value otherwise - */ -static int zynqmp_prepare_transfer_hardware(struct spi_master *master) -{ - struct zynqmp_qspi *xqspi = spi_master_get_devdata(master); - - zynqmp_gqspi_write(xqspi, GQSPI_EN_OFST, GQSPI_EN_MASK); - return 0; -} - -/** - * zynqmp_unprepare_transfer_hardware: Relaxes hardware after transfer - * @master: Pointer to the spi_master structure which provides - * information about the controller. - * - * This function disables the SPI master controller. - * - * Return: Always 0 - */ -static int zynqmp_unprepare_transfer_hardware(struct spi_master *master) -{ - struct zynqmp_qspi *xqspi = spi_master_get_devdata(master); - - zynqmp_gqspi_write(xqspi, GQSPI_EN_OFST, 0x0); - return 0; -} - -/** - * zynqmp_qspi_chipselect: Select or deselect the chip select line + * zynqmp_qspi_chipselect - Select or deselect the chip select line * @qspi: Pointer to the spi_device structure * @is_high: Select(0) or deselect (1) the chip select line */ @@ -386,12 +356,14 @@ static void zynqmp_qspi_chipselect(struct spi_device *qspi, bool is_high) { struct zynqmp_qspi *xqspi = spi_master_get_devdata(qspi->master); ulong timeout; - u32 genfifoentry = 0x0, statusreg; + u32 genfifoentry = 0, statusreg; genfifoentry |= GQSPI_GENFIFO_MODE_SPI; - genfifoentry |= xqspi->genfifobus; if (!is_high) { + xqspi->genfifobus = GQSPI_GENFIFO_BUS_LOWER; + xqspi->genfifocs = GQSPI_GENFIFO_CS_LOWER; + genfifoentry |= xqspi->genfifobus; genfifoentry |= xqspi->genfifocs; genfifoentry |= GQSPI_GENFIFO_CS_SETUP; } else { @@ -402,8 +374,8 @@ static void zynqmp_qspi_chipselect(struct spi_device *qspi, bool is_high) /* Manually start the generic FIFO command */ zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, - zynqmp_gqspi_read(xqspi, GQSPI_CONFIG_OFST) | - GQSPI_CFG_START_GEN_FIFO_MASK); + zynqmp_gqspi_read(xqspi, GQSPI_CONFIG_OFST) | + GQSPI_CFG_START_GEN_FIFO_MASK); timeout = jiffies + msecs_to_jiffies(1000); @@ -412,10 +384,9 @@ static void zynqmp_qspi_chipselect(struct spi_device *qspi, bool is_high) statusreg = zynqmp_gqspi_read(xqspi, GQSPI_ISR_OFST); if ((statusreg & GQSPI_ISR_GENFIFOEMPTY_MASK) && - (statusreg & GQSPI_ISR_TXEMPTY_MASK)) + (statusreg & GQSPI_ISR_TXEMPTY_MASK)) break; - else - cpu_relax(); + cpu_relax(); } while (!time_after_eq(jiffies, timeout)); if (time_after_eq(jiffies, timeout)) @@ -423,11 +394,38 @@ static void zynqmp_qspi_chipselect(struct spi_device *qspi, bool is_high) } /** - * zynqmp_qspi_setup_transfer: Configure QSPI controller for specified + * zynqmp_qspi_selectspimode - Selects SPI mode - x1 or x2 or x4. + * @xqspi: xqspi is a pointer to the GQSPI instance + * @spimode: spimode - SPI or DUAL or QUAD. + * Return: Mask to set desired SPI mode in GENFIFO entry. + */ +static inline u32 zynqmp_qspi_selectspimode(struct zynqmp_qspi *xqspi, + u8 spimode) +{ + u32 mask = 0; + + switch (spimode) { + case GQSPI_SELECT_MODE_DUALSPI: + mask = GQSPI_GENFIFO_MODE_DUALSPI; + break; + case GQSPI_SELECT_MODE_QUADSPI: + mask = GQSPI_GENFIFO_MODE_QUADSPI; + break; + case GQSPI_SELECT_MODE_SPI: + mask = GQSPI_GENFIFO_MODE_SPI; + break; + default: + dev_warn(xqspi->dev, "Invalid SPI mode\n"); + } + + return mask; +} + +/** + * zynqmp_qspi_config_op - Configure QSPI controller for specified * transfer + * @xqspi: Pointer to the zynqmp_qspi structure * @qspi: Pointer to the spi_device structure - * @transfer: Pointer to the spi_transfer structure which provides - * information about next transfer setup parameters * * Sets the operational mode of QSPI controller for the next QSPI transfer and * sets the requested clock frequency. @@ -444,17 +442,11 @@ static void zynqmp_qspi_chipselect(struct spi_device *qspi, bool is_high) * by the QSPI controller the driver will set the highest or lowest * frequency supported by controller. */ -static int zynqmp_qspi_setup_transfer(struct spi_device *qspi, - struct spi_transfer *transfer) +static int zynqmp_qspi_config_op(struct zynqmp_qspi *xqspi, + struct spi_device *qspi) { - struct zynqmp_qspi *xqspi = spi_master_get_devdata(qspi->master); ulong clk_rate; - u32 config_reg, req_hz, baud_rate_val = 0; - - if (transfer) - req_hz = transfer->speed_hz; - else - req_hz = qspi->max_speed_hz; + u32 config_reg, baud_rate_val = 0; /* Set the clock frequency */ /* If req_hz == 0, default to lowest speed */ @@ -462,7 +454,7 @@ static int zynqmp_qspi_setup_transfer(struct spi_device *qspi, while ((baud_rate_val < GQSPI_BAUD_DIV_MAX) && (clk_rate / - (GQSPI_BAUD_DIV_SHIFT << baud_rate_val)) > req_hz) + (GQSPI_BAUD_DIV_SHIFT << baud_rate_val)) > qspi->max_speed_hz) baud_rate_val++; config_reg = zynqmp_gqspi_read(xqspi, GQSPI_CONFIG_OFST); @@ -482,7 +474,7 @@ static int zynqmp_qspi_setup_transfer(struct spi_device *qspi, } /** - * zynqmp_qspi_setup: Configure the QSPI controller + * zynqmp_qspi_setup_op - Configure the QSPI controller * @qspi: Pointer to the spi_device structure * * Sets the operational mode of QSPI controller for the next QSPI transfer, @@ -490,15 +482,35 @@ static int zynqmp_qspi_setup_transfer(struct spi_device *qspi, * * Return: 0 on success; error value otherwise. */ -static int zynqmp_qspi_setup(struct spi_device *qspi) +static int zynqmp_qspi_setup_op(struct spi_device *qspi) { - if (qspi->master->busy) + struct spi_controller *ctlr = qspi->master; + struct zynqmp_qspi *xqspi = spi_controller_get_devdata(ctlr); + struct device *dev = &ctlr->dev; + int ret; + + if (ctlr->busy) return -EBUSY; + + ret = clk_enable(xqspi->refclk); + if (ret) { + dev_err(dev, "Cannot enable device clock.\n"); + return ret; + } + + ret = clk_enable(xqspi->pclk); + if (ret) { + dev_err(dev, "Cannot enable APB clock.\n"); + clk_disable(xqspi->refclk); + return ret; + } + zynqmp_gqspi_write(xqspi, GQSPI_EN_OFST, GQSPI_EN_MASK); + return 0; } /** - * zynqmp_qspi_filltxfifo: Fills the TX FIFO as long as there is room in + * zynqmp_qspi_filltxfifo - Fills the TX FIFO as long as there is room in * the FIFO or the bytes required to be * transmitted. * @xqspi: Pointer to the zynqmp_qspi structure @@ -524,7 +536,7 @@ static void zynqmp_qspi_filltxfifo(struct zynqmp_qspi *xqspi, int size) } /** - * zynqmp_qspi_readrxfifo: Fills the RX FIFO as long as there is room in + * zynqmp_qspi_readrxfifo - Fills the RX FIFO as long as there is room in * the FIFO. * @xqspi: Pointer to the zynqmp_qspi structure * @size: Number of bytes to be copied from RX buffer to RX FIFO @@ -536,7 +548,7 @@ static void zynqmp_qspi_readrxfifo(struct zynqmp_qspi *xqspi, u32 size) while ((count < size) && (xqspi->bytes_to_receive > 0)) { if (xqspi->bytes_to_receive >= 4) { - (*(u32 *) xqspi->rxbuf) = + (*(u32 *)xqspi->rxbuf) = zynqmp_gqspi_read(xqspi, GQSPI_RXD_OFST); xqspi->rxbuf += 4; xqspi->bytes_to_receive -= 4; @@ -552,7 +564,76 @@ static void zynqmp_qspi_readrxfifo(struct zynqmp_qspi *xqspi, u32 size) } /** - * zynqmp_process_dma_irq: Handler for DMA done interrupt of QSPI + * zynqmp_qspi_fillgenfifo - Fills the GENFIFO. + * @xqspi: Pointer to the zynqmp_qspi structure + * @nbits: Transfer/Receive buswidth. + * @genfifoentry: Variable in which GENFIFO mask is saved + */ +static void zynqmp_qspi_fillgenfifo(struct zynqmp_qspi *xqspi, u8 nbits, + u32 genfifoentry) +{ + u32 transfer_len = 0; + + if (xqspi->txbuf) { + genfifoentry &= ~GQSPI_GENFIFO_RX; + genfifoentry |= GQSPI_GENFIFO_DATA_XFER; + genfifoentry |= GQSPI_GENFIFO_TX; + transfer_len = xqspi->bytes_to_transfer; + } else { + genfifoentry &= ~GQSPI_GENFIFO_TX; + genfifoentry |= GQSPI_GENFIFO_DATA_XFER; + genfifoentry |= GQSPI_GENFIFO_RX; + if (xqspi->mode == GQSPI_MODE_DMA) + transfer_len = xqspi->dma_rx_bytes; + else + transfer_len = xqspi->bytes_to_receive; + } + genfifoentry |= zynqmp_qspi_selectspimode(xqspi, nbits); + xqspi->genfifoentry = genfifoentry; + + if ((transfer_len) < GQSPI_GENFIFO_IMM_DATA_MASK) { + genfifoentry &= ~GQSPI_GENFIFO_IMM_DATA_MASK; + genfifoentry |= transfer_len; + zynqmp_gqspi_write(xqspi, GQSPI_GEN_FIFO_OFST, genfifoentry); + } else { + int tempcount = transfer_len; + u32 exponent = 8; /* 2^8 = 256 */ + u8 imm_data = tempcount & 0xFF; + + tempcount &= ~(tempcount & 0xFF); + /* Immediate entry */ + if (tempcount != 0) { + /* Exponent entries */ + genfifoentry |= GQSPI_GENFIFO_EXP; + while (tempcount != 0) { + if (tempcount & GQSPI_GENFIFO_EXP_START) { + genfifoentry &= + ~GQSPI_GENFIFO_IMM_DATA_MASK; + genfifoentry |= exponent; + zynqmp_gqspi_write(xqspi, + GQSPI_GEN_FIFO_OFST, + genfifoentry); + } + tempcount = tempcount >> 1; + exponent++; + } + } + if (imm_data != 0) { + genfifoentry &= ~GQSPI_GENFIFO_EXP; + genfifoentry &= ~GQSPI_GENFIFO_IMM_DATA_MASK; + genfifoentry |= (u8)(imm_data & 0xFF); + zynqmp_gqspi_write(xqspi, GQSPI_GEN_FIFO_OFST, + genfifoentry); + } + } + if (xqspi->mode == GQSPI_MODE_IO && xqspi->rxbuf) { + /* Dummy generic FIFO entry */ + zynqmp_gqspi_write(xqspi, GQSPI_GEN_FIFO_OFST, 0x0); + } +} + +/** + * zynqmp_process_dma_irq - Handler for DMA done interrupt of QSPI * controller * @xqspi: zynqmp_qspi instance pointer * @@ -563,14 +644,14 @@ static void zynqmp_process_dma_irq(struct zynqmp_qspi *xqspi) u32 config_reg, genfifoentry; dma_unmap_single(xqspi->dev, xqspi->dma_addr, - xqspi->dma_rx_bytes, DMA_FROM_DEVICE); + xqspi->dma_rx_bytes, DMA_FROM_DEVICE); xqspi->rxbuf += xqspi->dma_rx_bytes; xqspi->bytes_to_receive -= xqspi->dma_rx_bytes; xqspi->dma_rx_bytes = 0; /* Disabling the DMA interrupts */ zynqmp_gqspi_write(xqspi, GQSPI_QSPIDMA_DST_I_DIS_OFST, - GQSPI_QSPIDMA_DST_I_EN_DONE_MASK); + GQSPI_QSPIDMA_DST_I_EN_DONE_MASK); if (xqspi->bytes_to_receive > 0) { /* Switch to IO mode,for remaining bytes to receive */ @@ -588,19 +669,20 @@ static void zynqmp_process_dma_irq(struct zynqmp_qspi *xqspi) /* Manual start */ zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, - (zynqmp_gqspi_read(xqspi, GQSPI_CONFIG_OFST) | - GQSPI_CFG_START_GEN_FIFO_MASK)); + (zynqmp_gqspi_read(xqspi, + GQSPI_CONFIG_OFST) | + GQSPI_CFG_START_GEN_FIFO_MASK)); /* Enable the RX interrupts for IO mode */ zynqmp_gqspi_write(xqspi, GQSPI_IER_OFST, - GQSPI_IER_GENFIFOEMPTY_MASK | - GQSPI_IER_RXNEMPTY_MASK | - GQSPI_IER_RXEMPTY_MASK); + GQSPI_IER_GENFIFOEMPTY_MASK | + GQSPI_IER_RXNEMPTY_MASK | + GQSPI_IER_RXEMPTY_MASK); } } /** - * zynqmp_qspi_irq: Interrupt service routine of the QSPI controller + * zynqmp_qspi_irq - Interrupt service routine of the QSPI controller * @irq: IRQ number * @dev_id: Pointer to the xqspi structure * @@ -613,9 +695,8 @@ static void zynqmp_process_dma_irq(struct zynqmp_qspi *xqspi) */ static irqreturn_t zynqmp_qspi_irq(int irq, void *dev_id) { - struct spi_master *master = dev_id; - struct zynqmp_qspi *xqspi = spi_master_get_devdata(master); - int ret = IRQ_NONE; + struct zynqmp_qspi *xqspi = (struct zynqmp_qspi *)dev_id; + irqreturn_t ret = IRQ_NONE; u32 status, mask, dma_status = 0; status = zynqmp_gqspi_read(xqspi, GQSPI_ISR_OFST); @@ -627,7 +708,7 @@ static irqreturn_t zynqmp_qspi_irq(int irq, void *dev_id) dma_status = zynqmp_gqspi_read(xqspi, GQSPI_QSPIDMA_DST_I_STS_OFST); zynqmp_gqspi_write(xqspi, GQSPI_QSPIDMA_DST_I_STS_OFST, - dma_status); + dma_status); } if (mask & GQSPI_ISR_TXNOT_FULL_MASK) { @@ -644,55 +725,27 @@ static irqreturn_t zynqmp_qspi_irq(int irq, void *dev_id) ret = IRQ_HANDLED; } - if ((xqspi->bytes_to_receive == 0) && (xqspi->bytes_to_transfer == 0) - && ((status & GQSPI_IRQ_MASK) == GQSPI_IRQ_MASK)) { + if (xqspi->bytes_to_receive == 0 && xqspi->bytes_to_transfer == 0 && + ((status & GQSPI_IRQ_MASK) == GQSPI_IRQ_MASK)) { zynqmp_gqspi_write(xqspi, GQSPI_IDR_OFST, GQSPI_ISR_IDR_MASK); - spi_finalize_current_transfer(master); + complete(&xqspi->data_completion); ret = IRQ_HANDLED; } return ret; } /** - * zynqmp_qspi_selectspimode: Selects SPI mode - x1 or x2 or x4. - * @xqspi: xqspi is a pointer to the GQSPI instance - * @spimode: spimode - SPI or DUAL or QUAD. - * Return: Mask to set desired SPI mode in GENFIFO entry. - */ -static inline u32 zynqmp_qspi_selectspimode(struct zynqmp_qspi *xqspi, - u8 spimode) -{ - u32 mask = 0; - - switch (spimode) { - case GQSPI_SELECT_MODE_DUALSPI: - mask = GQSPI_GENFIFO_MODE_DUALSPI; - break; - case GQSPI_SELECT_MODE_QUADSPI: - mask = GQSPI_GENFIFO_MODE_QUADSPI; - break; - case GQSPI_SELECT_MODE_SPI: - mask = GQSPI_GENFIFO_MODE_SPI; - break; - default: - dev_warn(xqspi->dev, "Invalid SPI mode\n"); - } - - return mask; -} - -/** - * zynq_qspi_setuprxdma: This function sets up the RX DMA operation + * zynqmp_qspi_setuprxdma - This function sets up the RX DMA operation * @xqspi: xqspi is a pointer to the GQSPI instance. */ -static void zynq_qspi_setuprxdma(struct zynqmp_qspi *xqspi) +static void zynqmp_qspi_setuprxdma(struct zynqmp_qspi *xqspi) { u32 rx_bytes, rx_rem, config_reg; dma_addr_t addr; u64 dma_align = (u64)(uintptr_t)xqspi->rxbuf; - if ((xqspi->bytes_to_receive < 8) || - ((dma_align & GQSPI_DMA_UNALIGN) != 0x0)) { + if (xqspi->bytes_to_receive < 8 || + ((dma_align & GQSPI_DMA_UNALIGN) != 0x0)) { /* Setting to IO mode */ config_reg = zynqmp_gqspi_read(xqspi, GQSPI_CONFIG_OFST); config_reg &= ~GQSPI_CFG_MODE_EN_MASK; @@ -706,17 +759,17 @@ static void zynq_qspi_setuprxdma(struct zynqmp_qspi *xqspi) rx_bytes = (xqspi->bytes_to_receive - rx_rem); addr = dma_map_single(xqspi->dev, (void *)xqspi->rxbuf, - rx_bytes, DMA_FROM_DEVICE); + rx_bytes, DMA_FROM_DEVICE); if (dma_mapping_error(xqspi->dev, addr)) dev_err(xqspi->dev, "ERR:rxdma:memory not mapped\n"); xqspi->dma_rx_bytes = rx_bytes; xqspi->dma_addr = addr; zynqmp_gqspi_write(xqspi, GQSPI_QSPIDMA_DST_ADDR_OFST, - (u32)(addr & 0xffffffff)); + (u32)(addr & 0xffffffff)); addr = ((addr >> 16) >> 16); zynqmp_gqspi_write(xqspi, GQSPI_QSPIDMA_DST_ADDR_MSB_OFST, - ((u32)addr) & 0xfff); + ((u32)addr) & 0xfff); /* Enabling the DMA mode */ config_reg = zynqmp_gqspi_read(xqspi, GQSPI_CONFIG_OFST); @@ -732,166 +785,48 @@ static void zynq_qspi_setuprxdma(struct zynqmp_qspi *xqspi) } /** - * zynqmp_qspi_txrxsetup: This function checks the TX/RX buffers in - * the transfer and sets up the GENFIFO entries, - * TX FIFO as required. - * @xqspi: xqspi is a pointer to the GQSPI instance. - * @transfer: It is a pointer to the structure containing transfer data. - * @genfifoentry: genfifoentry is pointer to the variable in which - * GENFIFO mask is returned to calling function + * zynqmp_qspi_write_op - This function sets up the GENFIFO entries, + * TX FIFO, and fills the TX FIFO with as many + * bytes as possible. + * @xqspi: Pointer to the GQSPI instance. + * @tx_nbits: Transfer buswidth. + * @genfifoentry: Variable in which GENFIFO mask is returned + * to calling function */ -static void zynqmp_qspi_txrxsetup(struct zynqmp_qspi *xqspi, - struct spi_transfer *transfer, - u32 *genfifoentry) +static void zynqmp_qspi_write_op(struct zynqmp_qspi *xqspi, u8 tx_nbits, + u32 genfifoentry) { u32 config_reg; - /* Transmit */ - if ((xqspi->txbuf != NULL) && (xqspi->rxbuf == NULL)) { - /* Setup data to be TXed */ - *genfifoentry &= ~GQSPI_GENFIFO_RX; - *genfifoentry |= GQSPI_GENFIFO_DATA_XFER; - *genfifoentry |= GQSPI_GENFIFO_TX; - *genfifoentry |= - zynqmp_qspi_selectspimode(xqspi, transfer->tx_nbits); - xqspi->bytes_to_transfer = transfer->len; - if (xqspi->mode == GQSPI_MODE_DMA) { - config_reg = zynqmp_gqspi_read(xqspi, - GQSPI_CONFIG_OFST); - config_reg &= ~GQSPI_CFG_MODE_EN_MASK; - zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, - config_reg); - xqspi->mode = GQSPI_MODE_IO; - } - zynqmp_qspi_filltxfifo(xqspi, GQSPI_TXD_DEPTH); - /* Discard RX data */ - xqspi->bytes_to_receive = 0; - } else if ((xqspi->txbuf == NULL) && (xqspi->rxbuf != NULL)) { - /* Receive */ - - /* TX auto fill */ - *genfifoentry &= ~GQSPI_GENFIFO_TX; - /* Setup RX */ - *genfifoentry |= GQSPI_GENFIFO_DATA_XFER; - *genfifoentry |= GQSPI_GENFIFO_RX; - *genfifoentry |= - zynqmp_qspi_selectspimode(xqspi, transfer->rx_nbits); - xqspi->bytes_to_transfer = 0; - xqspi->bytes_to_receive = transfer->len; - zynq_qspi_setuprxdma(xqspi); + zynqmp_qspi_fillgenfifo(xqspi, tx_nbits, genfifoentry); + zynqmp_qspi_filltxfifo(xqspi, GQSPI_TXD_DEPTH); + if (xqspi->mode == GQSPI_MODE_DMA) { + config_reg = zynqmp_gqspi_read(xqspi, + GQSPI_CONFIG_OFST); + config_reg &= ~GQSPI_CFG_MODE_EN_MASK; + zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, + config_reg); + xqspi->mode = GQSPI_MODE_IO; } } /** - * zynqmp_qspi_start_transfer: Initiates the QSPI transfer - * @master: Pointer to the spi_master structure which provides - * information about the controller. - * @qspi: Pointer to the spi_device structure - * @transfer: Pointer to the spi_transfer structure which provide information - * about next transfer parameters - * - * This function fills the TX FIFO, starts the QSPI transfer, and waits for the - * transfer to be completed. - * - * Return: Number of bytes transferred in the last transfer + * zynqmp_qspi_read_op - This function sets up the GENFIFO entries and + * RX DMA operation. + * @xqspi: xqspi is a pointer to the GQSPI instance. + * @rx_nbits: Receive buswidth. + * @genfifoentry: genfifoentry is pointer to the variable in which + * GENFIFO mask is returned to calling function */ -static int zynqmp_qspi_start_transfer(struct spi_master *master, - struct spi_device *qspi, - struct spi_transfer *transfer) +static void zynqmp_qspi_read_op(struct zynqmp_qspi *xqspi, u8 rx_nbits, + u32 genfifoentry) { - struct zynqmp_qspi *xqspi = spi_master_get_devdata(master); - u32 genfifoentry = 0x0, transfer_len; - - xqspi->txbuf = transfer->tx_buf; - xqspi->rxbuf = transfer->rx_buf; - - zynqmp_qspi_setup_transfer(qspi, transfer); - - genfifoentry |= xqspi->genfifocs; - genfifoentry |= xqspi->genfifobus; - - zynqmp_qspi_txrxsetup(xqspi, transfer, &genfifoentry); - - if (xqspi->mode == GQSPI_MODE_DMA) - transfer_len = xqspi->dma_rx_bytes; - else - transfer_len = transfer->len; - - xqspi->genfifoentry = genfifoentry; - if ((transfer_len) < GQSPI_GENFIFO_IMM_DATA_MASK) { - genfifoentry &= ~GQSPI_GENFIFO_IMM_DATA_MASK; - genfifoentry |= transfer_len; - zynqmp_gqspi_write(xqspi, GQSPI_GEN_FIFO_OFST, genfifoentry); - } else { - int tempcount = transfer_len; - u32 exponent = 8; /* 2^8 = 256 */ - u8 imm_data = tempcount & 0xFF; - - tempcount &= ~(tempcount & 0xFF); - /* Immediate entry */ - if (tempcount != 0) { - /* Exponent entries */ - genfifoentry |= GQSPI_GENFIFO_EXP; - while (tempcount != 0) { - if (tempcount & GQSPI_GENFIFO_EXP_START) { - genfifoentry &= - ~GQSPI_GENFIFO_IMM_DATA_MASK; - genfifoentry |= exponent; - zynqmp_gqspi_write(xqspi, - GQSPI_GEN_FIFO_OFST, - genfifoentry); - } - tempcount = tempcount >> 1; - exponent++; - } - } - if (imm_data != 0) { - genfifoentry &= ~GQSPI_GENFIFO_EXP; - genfifoentry &= ~GQSPI_GENFIFO_IMM_DATA_MASK; - genfifoentry |= (u8) (imm_data & 0xFF); - zynqmp_gqspi_write(xqspi, - GQSPI_GEN_FIFO_OFST, genfifoentry); - } - } - - if ((xqspi->mode == GQSPI_MODE_IO) && - (xqspi->rxbuf != NULL)) { - /* Dummy generic FIFO entry */ - zynqmp_gqspi_write(xqspi, GQSPI_GEN_FIFO_OFST, 0x0); - } - - /* Since we are using manual mode */ - zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, - zynqmp_gqspi_read(xqspi, GQSPI_CONFIG_OFST) | - GQSPI_CFG_START_GEN_FIFO_MASK); - - if (xqspi->txbuf != NULL) - /* Enable interrupts for TX */ - zynqmp_gqspi_write(xqspi, GQSPI_IER_OFST, - GQSPI_IER_TXEMPTY_MASK | - GQSPI_IER_GENFIFOEMPTY_MASK | - GQSPI_IER_TXNOT_FULL_MASK); - - if (xqspi->rxbuf != NULL) { - /* Enable interrupts for RX */ - if (xqspi->mode == GQSPI_MODE_DMA) { - /* Enable DMA interrupts */ - zynqmp_gqspi_write(xqspi, - GQSPI_QSPIDMA_DST_I_EN_OFST, - GQSPI_QSPIDMA_DST_I_EN_DONE_MASK); - } else { - zynqmp_gqspi_write(xqspi, GQSPI_IER_OFST, - GQSPI_IER_GENFIFOEMPTY_MASK | - GQSPI_IER_RXNEMPTY_MASK | - GQSPI_IER_RXEMPTY_MASK); - } - } - - return transfer->len; + zynqmp_qspi_fillgenfifo(xqspi, rx_nbits, genfifoentry); + zynqmp_qspi_setuprxdma(xqspi); } /** - * zynqmp_qspi_suspend: Suspend method for the QSPI driver + * zynqmp_qspi_suspend - Suspend method for the QSPI driver * @dev: Address of the platform_device structure * * This function stops the QSPI driver queue and disables the QSPI controller @@ -900,17 +835,18 @@ static int zynqmp_qspi_start_transfer(struct spi_master *master, */ static int __maybe_unused zynqmp_qspi_suspend(struct device *dev) { - struct spi_master *master = dev_get_drvdata(dev); + struct spi_controller *ctlr = dev_get_drvdata(dev); + struct zynqmp_qspi *xqspi = spi_controller_get_devdata(ctlr); - spi_master_suspend(master); + spi_controller_suspend(ctlr); - zynqmp_unprepare_transfer_hardware(master); + zynqmp_gqspi_write(xqspi, GQSPI_EN_OFST, 0x0); return 0; } /** - * zynqmp_qspi_resume: Resume method for the QSPI driver + * zynqmp_qspi_resume - Resume method for the QSPI driver * @dev: Address of the platform_device structure * * The function starts the QSPI driver queue and initializes the QSPI @@ -920,8 +856,8 @@ static int __maybe_unused zynqmp_qspi_suspend(struct device *dev) */ static int __maybe_unused zynqmp_qspi_resume(struct device *dev) { - struct spi_master *master = dev_get_drvdata(dev); - struct zynqmp_qspi *xqspi = spi_master_get_devdata(master); + struct spi_controller *ctlr = dev_get_drvdata(dev); + struct zynqmp_qspi *xqspi = spi_controller_get_devdata(ctlr); int ret = 0; ret = clk_enable(xqspi->pclk); @@ -937,7 +873,7 @@ static int __maybe_unused zynqmp_qspi_resume(struct device *dev) return ret; } - spi_master_resume(master); + spi_controller_resume(ctlr); clk_disable(xqspi->refclk); clk_disable(xqspi->pclk); @@ -954,8 +890,7 @@ static int __maybe_unused zynqmp_qspi_resume(struct device *dev) */ static int __maybe_unused zynqmp_runtime_suspend(struct device *dev) { - struct spi_master *master = dev_get_drvdata(dev); - struct zynqmp_qspi *xqspi = spi_master_get_devdata(master); + struct zynqmp_qspi *xqspi = (struct zynqmp_qspi *)dev_get_drvdata(dev); clk_disable(xqspi->refclk); clk_disable(xqspi->pclk); @@ -973,8 +908,7 @@ static int __maybe_unused zynqmp_runtime_suspend(struct device *dev) */ static int __maybe_unused zynqmp_runtime_resume(struct device *dev) { - struct spi_master *master = dev_get_drvdata(dev); - struct zynqmp_qspi *xqspi = spi_master_get_devdata(master); + struct zynqmp_qspi *xqspi = (struct zynqmp_qspi *)dev_get_drvdata(dev); int ret; ret = clk_enable(xqspi->pclk); @@ -993,14 +927,179 @@ static int __maybe_unused zynqmp_runtime_resume(struct device *dev) return 0; } +/** + * zynqmp_qspi_exec_op() - Initiates the QSPI transfer + * @mem: The SPI memory + * @op: The memory operation to execute + * + * Executes a memory operation. + * + * This function first selects the chip and starts the memory operation. + * + * Return: 0 in case of success, a negative error code otherwise. + */ +static int zynqmp_qspi_exec_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + struct zynqmp_qspi *xqspi = spi_controller_get_devdata + (mem->spi->master); + int err = 0, i; + u8 *tmpbuf; + u32 genfifoentry = 0; + + dev_dbg(xqspi->dev, "cmd:%#x mode:%d.%d.%d.%d\n", + op->cmd.opcode, op->cmd.buswidth, op->addr.buswidth, + op->dummy.buswidth, op->data.buswidth); + + zynqmp_qspi_config_op(xqspi, mem->spi); + zynqmp_qspi_chipselect(mem->spi, false); + genfifoentry |= xqspi->genfifocs; + genfifoentry |= xqspi->genfifobus; + + if (op->cmd.opcode) { + tmpbuf = kzalloc(op->cmd.nbytes, GFP_KERNEL | GFP_DMA); + if (!tmpbuf) + return -ENOMEM; + tmpbuf[0] = op->cmd.opcode; + reinit_completion(&xqspi->data_completion); + xqspi->txbuf = tmpbuf; + xqspi->rxbuf = NULL; + xqspi->bytes_to_transfer = op->cmd.nbytes; + xqspi->bytes_to_receive = 0; + zynqmp_qspi_write_op(xqspi, op->cmd.buswidth, genfifoentry); + zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, + zynqmp_gqspi_read(xqspi, GQSPI_CONFIG_OFST) | + GQSPI_CFG_START_GEN_FIFO_MASK); + zynqmp_gqspi_write(xqspi, GQSPI_IER_OFST, + GQSPI_IER_GENFIFOEMPTY_MASK | + GQSPI_IER_TXNOT_FULL_MASK); + if (!wait_for_completion_interruptible_timeout + (&xqspi->data_completion, msecs_to_jiffies(1000))) { + err = -ETIMEDOUT; + kfree(tmpbuf); + goto return_err; + } + kfree(tmpbuf); + } + + if (op->addr.nbytes) { + for (i = 0; i < op->addr.nbytes; i++) { + *(((u8 *)xqspi->txbuf) + i) = op->addr.val >> + (8 * (op->addr.nbytes - i - 1)); + } + + reinit_completion(&xqspi->data_completion); + xqspi->rxbuf = NULL; + xqspi->bytes_to_transfer = op->addr.nbytes; + xqspi->bytes_to_receive = 0; + zynqmp_qspi_write_op(xqspi, op->addr.buswidth, genfifoentry); + zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, + zynqmp_gqspi_read(xqspi, + GQSPI_CONFIG_OFST) | + GQSPI_CFG_START_GEN_FIFO_MASK); + zynqmp_gqspi_write(xqspi, GQSPI_IER_OFST, + GQSPI_IER_TXEMPTY_MASK | + GQSPI_IER_GENFIFOEMPTY_MASK | + GQSPI_IER_TXNOT_FULL_MASK); + if (!wait_for_completion_interruptible_timeout + (&xqspi->data_completion, msecs_to_jiffies(1000))) { + err = -ETIMEDOUT; + goto return_err; + } + } + + if (op->dummy.nbytes) { + tmpbuf = kzalloc(op->dummy.nbytes, GFP_KERNEL | GFP_DMA); + if (!tmpbuf) + return -ENOMEM; + memset(tmpbuf, 0xff, op->dummy.nbytes); + reinit_completion(&xqspi->data_completion); + xqspi->txbuf = tmpbuf; + xqspi->rxbuf = NULL; + xqspi->bytes_to_transfer = op->dummy.nbytes; + xqspi->bytes_to_receive = 0; + zynqmp_qspi_write_op(xqspi, op->dummy.buswidth, + genfifoentry); + zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, + zynqmp_gqspi_read(xqspi, GQSPI_CONFIG_OFST) | + GQSPI_CFG_START_GEN_FIFO_MASK); + zynqmp_gqspi_write(xqspi, GQSPI_IER_OFST, + GQSPI_IER_TXEMPTY_MASK | + GQSPI_IER_GENFIFOEMPTY_MASK | + GQSPI_IER_TXNOT_FULL_MASK); + if (!wait_for_completion_interruptible_timeout + (&xqspi->data_completion, msecs_to_jiffies(1000))) { + err = -ETIMEDOUT; + kfree(tmpbuf); + goto return_err; + } + + kfree(tmpbuf); + } + + if (op->data.nbytes) { + reinit_completion(&xqspi->data_completion); + if (op->data.dir == SPI_MEM_DATA_OUT) { + xqspi->txbuf = (u8 *)op->data.buf.out; + xqspi->rxbuf = NULL; + xqspi->bytes_to_transfer = op->data.nbytes; + xqspi->bytes_to_receive = 0; + zynqmp_qspi_write_op(xqspi, op->data.buswidth, + genfifoentry); + zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, + zynqmp_gqspi_read + (xqspi, GQSPI_CONFIG_OFST) | + GQSPI_CFG_START_GEN_FIFO_MASK); + zynqmp_gqspi_write(xqspi, GQSPI_IER_OFST, + GQSPI_IER_TXEMPTY_MASK | + GQSPI_IER_GENFIFOEMPTY_MASK | + GQSPI_IER_TXNOT_FULL_MASK); + } else { + xqspi->txbuf = NULL; + xqspi->rxbuf = (u8 *)op->data.buf.in; + xqspi->bytes_to_receive = op->data.nbytes; + xqspi->bytes_to_transfer = 0; + zynqmp_qspi_read_op(xqspi, op->data.buswidth, + genfifoentry); + zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, + zynqmp_gqspi_read + (xqspi, GQSPI_CONFIG_OFST) | + GQSPI_CFG_START_GEN_FIFO_MASK); + if (xqspi->mode == GQSPI_MODE_DMA) { + zynqmp_gqspi_write + (xqspi, GQSPI_QSPIDMA_DST_I_EN_OFST, + GQSPI_QSPIDMA_DST_I_EN_DONE_MASK); + } else { + zynqmp_gqspi_write(xqspi, GQSPI_IER_OFST, + GQSPI_IER_GENFIFOEMPTY_MASK | + GQSPI_IER_RXNEMPTY_MASK | + GQSPI_IER_RXEMPTY_MASK); + } + } + if (!wait_for_completion_interruptible_timeout + (&xqspi->data_completion, msecs_to_jiffies(1000))) + err = -ETIMEDOUT; + } + +return_err: + + zynqmp_qspi_chipselect(mem->spi, true); + + return err; +} + static const struct dev_pm_ops zynqmp_qspi_dev_pm_ops = { SET_RUNTIME_PM_OPS(zynqmp_runtime_suspend, zynqmp_runtime_resume, NULL) SET_SYSTEM_SLEEP_PM_OPS(zynqmp_qspi_suspend, zynqmp_qspi_resume) }; +static const struct spi_controller_mem_ops zynqmp_qspi_mem_ops = { + .exec_op = zynqmp_qspi_exec_op, +}; + /** - * zynqmp_qspi_probe: Probe method for the QSPI driver + * zynqmp_qspi_probe - Probe method for the QSPI driver * @pdev: Pointer to the platform_device structure * * This function initializes the driver data structures and the hardware. @@ -1010,17 +1109,18 @@ static const struct dev_pm_ops zynqmp_qspi_dev_pm_ops = { static int zynqmp_qspi_probe(struct platform_device *pdev) { int ret = 0; - struct spi_master *master; + struct spi_controller *ctlr; struct zynqmp_qspi *xqspi; struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; - master = spi_alloc_master(&pdev->dev, sizeof(*xqspi)); - if (!master) + ctlr = spi_alloc_master(&pdev->dev, sizeof(*xqspi)); + if (!ctlr) return -ENOMEM; - xqspi = spi_master_get_devdata(master); - master->dev.of_node = pdev->dev.of_node; - platform_set_drvdata(pdev, master); + xqspi = spi_controller_get_devdata(ctlr); + xqspi->dev = dev; + platform_set_drvdata(pdev, xqspi); xqspi->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(xqspi->regs)) { @@ -1028,7 +1128,6 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) goto remove_master; } - xqspi->dev = dev; xqspi->pclk = devm_clk_get(&pdev->dev, "pclk"); if (IS_ERR(xqspi->pclk)) { dev_err(dev, "pclk clock not found.\n"); @@ -1036,11 +1135,7 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) goto remove_master; } - ret = clk_prepare_enable(xqspi->pclk); - if (ret) { - dev_err(dev, "Unable to enable APB clock.\n"); - goto remove_master; - } + init_completion(&xqspi->data_completion); xqspi->refclk = devm_clk_get(&pdev->dev, "ref_clk"); if (IS_ERR(xqspi->refclk)) { @@ -1049,6 +1144,12 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) goto clk_dis_pclk; } + ret = clk_prepare_enable(xqspi->pclk); + if (ret) { + dev_err(dev, "Unable to enable APB clock.\n"); + goto remove_master; + } + ret = clk_prepare_enable(xqspi->refclk); if (ret) { dev_err(dev, "Unable to enable device clock.\n"); @@ -1070,32 +1171,28 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) goto clk_dis_all; } ret = devm_request_irq(&pdev->dev, xqspi->irq, zynqmp_qspi_irq, - 0, pdev->name, master); + 0, pdev->name, xqspi); if (ret != 0) { ret = -ENXIO; dev_err(dev, "request_irq failed\n"); goto clk_dis_all; } - master->num_chipselect = GQSPI_DEFAULT_NUM_CS; - - master->setup = zynqmp_qspi_setup; - master->set_cs = zynqmp_qspi_chipselect; - master->transfer_one = zynqmp_qspi_start_transfer; - master->prepare_transfer_hardware = zynqmp_prepare_transfer_hardware; - master->unprepare_transfer_hardware = - zynqmp_unprepare_transfer_hardware; - master->max_speed_hz = clk_get_rate(xqspi->refclk) / 2; - master->bits_per_word_mask = SPI_BPW_MASK(8); - master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD | + ctlr->bits_per_word_mask = SPI_BPW_MASK(8); + ctlr->num_chipselect = GQSPI_DEFAULT_NUM_CS; + ctlr->mem_ops = &zynqmp_qspi_mem_ops; + ctlr->setup = zynqmp_qspi_setup_op; + ctlr->max_speed_hz = clk_get_rate(xqspi->refclk) / 2; + ctlr->bits_per_word_mask = SPI_BPW_MASK(8); + ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD | SPI_TX_DUAL | SPI_TX_QUAD; + ctlr->dev.of_node = np; - if (master->dev.parent == NULL) - master->dev.parent = &master->dev; - - ret = spi_register_master(master); - if (ret) + ret = devm_spi_register_controller(&pdev->dev, ctlr); + if (ret) { + dev_err(&pdev->dev, "spi_register_controller failed\n"); goto clk_dis_all; + } return 0; @@ -1106,13 +1203,13 @@ clk_dis_all: clk_dis_pclk: clk_disable_unprepare(xqspi->pclk); remove_master: - spi_master_put(master); + spi_controller_put(ctlr); return ret; } /** - * zynqmp_qspi_remove: Remove method for the QSPI driver + * zynqmp_qspi_remove - Remove method for the QSPI driver * @pdev: Pointer to the platform_device structure * * This function is called if a device is physically removed from the system or @@ -1123,8 +1220,7 @@ remove_master: */ static int zynqmp_qspi_remove(struct platform_device *pdev) { - struct spi_master *master = platform_get_drvdata(pdev); - struct zynqmp_qspi *xqspi = spi_master_get_devdata(master); + struct zynqmp_qspi *xqspi = platform_get_drvdata(pdev); zynqmp_gqspi_write(xqspi, GQSPI_EN_OFST, 0x0); clk_disable_unprepare(xqspi->refclk); @@ -1132,8 +1228,6 @@ static int zynqmp_qspi_remove(struct platform_device *pdev) pm_runtime_set_suspended(&pdev->dev); pm_runtime_disable(&pdev->dev); - spi_unregister_master(master); - return 0; } diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c index 455e99c4958e..859910ec8d9f 100644 --- a/drivers/spi/spidev.c +++ b/drivers/spi/spidev.c @@ -146,7 +146,7 @@ static ssize_t spidev_read(struct file *filp, char __user *buf, size_t count, loff_t *f_pos) { struct spidev_data *spidev; - ssize_t status = 0; + ssize_t status; /* chipselect only toggles at start or end of operation */ if (count > bufsiz) @@ -176,7 +176,7 @@ spidev_write(struct file *filp, const char __user *buf, size_t count, loff_t *f_pos) { struct spidev_data *spidev; - ssize_t status = 0; + ssize_t status; unsigned long missing; /* chipselect only toggles at start or end of operation */ diff --git a/include/linux/pxa2xx_ssp.h b/include/linux/pxa2xx_ssp.h index 6facf27865f9..7f73b26ed22e 100644 --- a/include/linux/pxa2xx_ssp.h +++ b/include/linux/pxa2xx_ssp.h @@ -1,7 +1,5 @@ /* SPDX-License-Identifier: GPL-2.0-only */ /* - * pxa2xx_ssp.h - * * Copyright (C) 2003 Russell King, All Rights Reserved. * * This driver supports the following PXA CPU/SSP ports:- @@ -16,10 +14,16 @@ #ifndef __LINUX_SSP_H #define __LINUX_SSP_H -#include <linux/list.h> +#include <linux/bits.h> +#include <linux/compiler_types.h> #include <linux/io.h> -#include <linux/of.h> +#include <linux/kconfig.h> +#include <linux/list.h> +#include <linux/types.h> +struct clk; +struct device; +struct device_node; /* * SSP Serial Port Registers @@ -43,130 +47,127 @@ #define SSACDD (0x40) /* SSP Audio Clock Dither Divider */ /* Common PXA2xx bits first */ -#define SSCR0_DSS (0x0000000f) /* Data Size Select (mask) */ +#define SSCR0_DSS GENMASK(3, 0) /* Data Size Select (mask) */ #define SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..16] */ -#define SSCR0_FRF (0x00000030) /* FRame Format (mask) */ +#define SSCR0_FRF GENMASK(5, 4) /* FRame Format (mask) */ #define SSCR0_Motorola (0x0 << 4) /* Motorola's Serial Peripheral Interface (SPI) */ #define SSCR0_TI (0x1 << 4) /* Texas Instruments' Synchronous Serial Protocol (SSP) */ #define SSCR0_National (0x2 << 4) /* National Microwire */ -#define SSCR0_ECS (1 << 6) /* External clock select */ -#define SSCR0_SSE (1 << 7) /* Synchronous Serial Port Enable */ +#define SSCR0_ECS BIT(6) /* External clock select */ +#define SSCR0_SSE BIT(7) /* Synchronous Serial Port Enable */ #define SSCR0_SCR(x) ((x) << 8) /* Serial Clock Rate (mask) */ /* PXA27x, PXA3xx */ -#define SSCR0_EDSS (1 << 20) /* Extended data size select */ -#define SSCR0_NCS (1 << 21) /* Network clock select */ -#define SSCR0_RIM (1 << 22) /* Receive FIFO overrrun interrupt mask */ -#define SSCR0_TUM (1 << 23) /* Transmit FIFO underrun interrupt mask */ -#define SSCR0_FRDC (0x07000000) /* Frame rate divider control (mask) */ +#define SSCR0_EDSS BIT(20) /* Extended data size select */ +#define SSCR0_NCS BIT(21) /* Network clock select */ +#define SSCR0_RIM BIT(22) /* Receive FIFO overrrun interrupt mask */ +#define SSCR0_TUM BIT(23) /* Transmit FIFO underrun interrupt mask */ +#define SSCR0_FRDC GENMASK(26, 24) /* Frame rate divider control (mask) */ #define SSCR0_SlotsPerFrm(x) (((x) - 1) << 24) /* Time slots per frame [1..8] */ -#define SSCR0_FPCKE (1 << 29) /* FIFO packing enable */ -#define SSCR0_ACS (1 << 30) /* Audio clock select */ -#define SSCR0_MOD (1 << 31) /* Mode (normal or network) */ - - -#define SSCR1_RIE (1 << 0) /* Receive FIFO Interrupt Enable */ -#define SSCR1_TIE (1 << 1) /* Transmit FIFO Interrupt Enable */ -#define SSCR1_LBM (1 << 2) /* Loop-Back Mode */ -#define SSCR1_SPO (1 << 3) /* Motorola SPI SSPSCLK polarity setting */ -#define SSCR1_SPH (1 << 4) /* Motorola SPI SSPSCLK phase setting */ -#define SSCR1_MWDS (1 << 5) /* Microwire Transmit Data Size */ - -#define SSSR_ALT_FRM_MASK 3 /* Masks the SFRM signal number */ -#define SSSR_TNF (1 << 2) /* Transmit FIFO Not Full */ -#define SSSR_RNE (1 << 3) /* Receive FIFO Not Empty */ -#define SSSR_BSY (1 << 4) /* SSP Busy */ -#define SSSR_TFS (1 << 5) /* Transmit FIFO Service Request */ -#define SSSR_RFS (1 << 6) /* Receive FIFO Service Request */ -#define SSSR_ROR (1 << 7) /* Receive FIFO Overrun */ +#define SSCR0_FPCKE BIT(29) /* FIFO packing enable */ +#define SSCR0_ACS BIT(30) /* Audio clock select */ +#define SSCR0_MOD BIT(31) /* Mode (normal or network) */ + +#define SSCR1_RIE BIT(0) /* Receive FIFO Interrupt Enable */ +#define SSCR1_TIE BIT(1) /* Transmit FIFO Interrupt Enable */ +#define SSCR1_LBM BIT(2) /* Loop-Back Mode */ +#define SSCR1_SPO BIT(3) /* Motorola SPI SSPSCLK polarity setting */ +#define SSCR1_SPH BIT(4) /* Motorola SPI SSPSCLK phase setting */ +#define SSCR1_MWDS BIT(5) /* Microwire Transmit Data Size */ + +#define SSSR_ALT_FRM_MASK GENMASK(1, 0) /* Masks the SFRM signal number */ +#define SSSR_TNF BIT(2) /* Transmit FIFO Not Full */ +#define SSSR_RNE BIT(3) /* Receive FIFO Not Empty */ +#define SSSR_BSY BIT(4) /* SSP Busy */ +#define SSSR_TFS BIT(5) /* Transmit FIFO Service Request */ +#define SSSR_RFS BIT(6) /* Receive FIFO Service Request */ +#define SSSR_ROR BIT(7) /* Receive FIFO Overrun */ #define RX_THRESH_DFLT 8 #define TX_THRESH_DFLT 8 -#define SSSR_TFL_MASK (0xf << 8) /* Transmit FIFO Level mask */ -#define SSSR_RFL_MASK (0xf << 12) /* Receive FIFO Level mask */ +#define SSSR_TFL_MASK GENMASK(11, 8) /* Transmit FIFO Level mask */ +#define SSSR_RFL_MASK GENMASK(15, 12) /* Receive FIFO Level mask */ -#define SSCR1_TFT (0x000003c0) /* Transmit FIFO Threshold (mask) */ +#define SSCR1_TFT GENMASK(9, 6) /* Transmit FIFO Threshold (mask) */ #define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..16] */ -#define SSCR1_RFT (0x00003c00) /* Receive FIFO Threshold (mask) */ +#define SSCR1_RFT GENMASK(13, 10) /* Receive FIFO Threshold (mask) */ #define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..16] */ #define RX_THRESH_CE4100_DFLT 2 #define TX_THRESH_CE4100_DFLT 2 -#define CE4100_SSSR_TFL_MASK (0x3 << 8) /* Transmit FIFO Level mask */ -#define CE4100_SSSR_RFL_MASK (0x3 << 12) /* Receive FIFO Level mask */ +#define CE4100_SSSR_TFL_MASK GENMASK(9, 8) /* Transmit FIFO Level mask */ +#define CE4100_SSSR_RFL_MASK GENMASK(13, 12) /* Receive FIFO Level mask */ -#define CE4100_SSCR1_TFT (0x000000c0) /* Transmit FIFO Threshold (mask) */ +#define CE4100_SSCR1_TFT GENMASK(7, 6) /* Transmit FIFO Threshold (mask) */ #define CE4100_SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..4] */ -#define CE4100_SSCR1_RFT (0x00000c00) /* Receive FIFO Threshold (mask) */ +#define CE4100_SSCR1_RFT GENMASK(11, 10) /* Receive FIFO Threshold (mask) */ #define CE4100_SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..4] */ /* QUARK_X1000 SSCR0 bit definition */ -#define QUARK_X1000_SSCR0_DSS (0x1F << 0) /* Data Size Select (mask) */ +#define QUARK_X1000_SSCR0_DSS GENMASK(4, 0) /* Data Size Select (mask) */ #define QUARK_X1000_SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..32] */ -#define QUARK_X1000_SSCR0_FRF (0x3 << 5) /* FRame Format (mask) */ +#define QUARK_X1000_SSCR0_FRF GENMASK(6, 5) /* FRame Format (mask) */ #define QUARK_X1000_SSCR0_Motorola (0x0 << 5) /* Motorola's Serial Peripheral Interface (SPI) */ #define RX_THRESH_QUARK_X1000_DFLT 1 #define TX_THRESH_QUARK_X1000_DFLT 16 -#define QUARK_X1000_SSSR_TFL_MASK (0x1F << 8) /* Transmit FIFO Level mask */ -#define QUARK_X1000_SSSR_RFL_MASK (0x1F << 13) /* Receive FIFO Level mask */ +#define QUARK_X1000_SSSR_TFL_MASK GENMASK(12, 8) /* Transmit FIFO Level mask */ +#define QUARK_X1000_SSSR_RFL_MASK GENMASK(17, 13) /* Receive FIFO Level mask */ -#define QUARK_X1000_SSCR1_TFT (0x1F << 6) /* Transmit FIFO Threshold (mask) */ +#define QUARK_X1000_SSCR1_TFT GENMASK(10, 6) /* Transmit FIFO Threshold (mask) */ #define QUARK_X1000_SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..32] */ -#define QUARK_X1000_SSCR1_RFT (0x1F << 11) /* Receive FIFO Threshold (mask) */ +#define QUARK_X1000_SSCR1_RFT GENMASK(15, 11) /* Receive FIFO Threshold (mask) */ #define QUARK_X1000_SSCR1_RxTresh(x) (((x) - 1) << 11) /* level [1..32] */ -#define QUARK_X1000_SSCR1_STRF (1 << 17) /* Select FIFO or EFWR */ -#define QUARK_X1000_SSCR1_EFWR (1 << 16) /* Enable FIFO Write/Read */ +#define QUARK_X1000_SSCR1_EFWR BIT(16) /* Enable FIFO Write/Read */ +#define QUARK_X1000_SSCR1_STRF BIT(17) /* Select FIFO or EFWR */ /* extra bits in PXA255, PXA26x and PXA27x SSP ports */ #define SSCR0_TISSP (1 << 4) /* TI Sync Serial Protocol */ #define SSCR0_PSP (3 << 4) /* PSP - Programmable Serial Protocol */ -#define SSCR1_TTELP (1 << 31) /* TXD Tristate Enable Last Phase */ -#define SSCR1_TTE (1 << 30) /* TXD Tristate Enable */ -#define SSCR1_EBCEI (1 << 29) /* Enable Bit Count Error interrupt */ -#define SSCR1_SCFR (1 << 28) /* Slave Clock free Running */ -#define SSCR1_ECRA (1 << 27) /* Enable Clock Request A */ -#define SSCR1_ECRB (1 << 26) /* Enable Clock request B */ -#define SSCR1_SCLKDIR (1 << 25) /* Serial Bit Rate Clock Direction */ -#define SSCR1_SFRMDIR (1 << 24) /* Frame Direction */ -#define SSCR1_RWOT (1 << 23) /* Receive Without Transmit */ -#define SSCR1_TRAIL (1 << 22) /* Trailing Byte */ -#define SSCR1_TSRE (1 << 21) /* Transmit Service Request Enable */ -#define SSCR1_RSRE (1 << 20) /* Receive Service Request Enable */ -#define SSCR1_TINTE (1 << 19) /* Receiver Time-out Interrupt enable */ -#define SSCR1_PINTE (1 << 18) /* Peripheral Trailing Byte Interrupt Enable */ -#define SSCR1_IFS (1 << 16) /* Invert Frame Signal */ -#define SSCR1_STRF (1 << 15) /* Select FIFO or EFWR */ -#define SSCR1_EFWR (1 << 14) /* Enable FIFO Write/Read */ - -#define SSSR_BCE (1 << 23) /* Bit Count Error */ -#define SSSR_CSS (1 << 22) /* Clock Synchronisation Status */ -#define SSSR_TUR (1 << 21) /* Transmit FIFO Under Run */ -#define SSSR_EOC (1 << 20) /* End Of Chain */ -#define SSSR_TINT (1 << 19) /* Receiver Time-out Interrupt */ -#define SSSR_PINT (1 << 18) /* Peripheral Trailing Byte Interrupt */ +#define SSCR1_EFWR BIT(14) /* Enable FIFO Write/Read */ +#define SSCR1_STRF BIT(15) /* Select FIFO or EFWR */ +#define SSCR1_IFS BIT(16) /* Invert Frame Signal */ +#define SSCR1_PINTE BIT(18) /* Peripheral Trailing Byte Interrupt Enable */ +#define SSCR1_TINTE BIT(19) /* Receiver Time-out Interrupt enable */ +#define SSCR1_RSRE BIT(20) /* Receive Service Request Enable */ +#define SSCR1_TSRE BIT(21) /* Transmit Service Request Enable */ +#define SSCR1_TRAIL BIT(22) /* Trailing Byte */ +#define SSCR1_RWOT BIT(23) /* Receive Without Transmit */ +#define SSCR1_SFRMDIR BIT(24) /* Frame Direction */ +#define SSCR1_SCLKDIR BIT(25) /* Serial Bit Rate Clock Direction */ +#define SSCR1_ECRB BIT(26) /* Enable Clock request B */ +#define SSCR1_ECRA BIT(27) /* Enable Clock Request A */ +#define SSCR1_SCFR BIT(28) /* Slave Clock free Running */ +#define SSCR1_EBCEI BIT(29) /* Enable Bit Count Error interrupt */ +#define SSCR1_TTE BIT(30) /* TXD Tristate Enable */ +#define SSCR1_TTELP BIT(31) /* TXD Tristate Enable Last Phase */ + +#define SSSR_PINT BIT(18) /* Peripheral Trailing Byte Interrupt */ +#define SSSR_TINT BIT(19) /* Receiver Time-out Interrupt */ +#define SSSR_EOC BIT(20) /* End Of Chain */ +#define SSSR_TUR BIT(21) /* Transmit FIFO Under Run */ +#define SSSR_CSS BIT(22) /* Clock Synchronisation Status */ +#define SSSR_BCE BIT(23) /* Bit Count Error */ #define SSPSP_SCMODE(x) ((x) << 0) /* Serial Bit Rate Clock Mode */ -#define SSPSP_SFRMP (1 << 2) /* Serial Frame Polarity */ -#define SSPSP_ETDS (1 << 3) /* End of Transfer data State */ +#define SSPSP_SFRMP BIT(2) /* Serial Frame Polarity */ +#define SSPSP_ETDS BIT(3) /* End of Transfer data State */ #define SSPSP_STRTDLY(x) ((x) << 4) /* Start Delay */ #define SSPSP_DMYSTRT(x) ((x) << 7) /* Dummy Start */ #define SSPSP_SFRMDLY(x) ((x) << 9) /* Serial Frame Delay */ #define SSPSP_SFRMWDTH(x) ((x) << 16) /* Serial Frame Width */ #define SSPSP_DMYSTOP(x) ((x) << 23) /* Dummy Stop */ -#define SSPSP_FSRT (1 << 25) /* Frame Sync Relative Timing */ +#define SSPSP_FSRT BIT(25) /* Frame Sync Relative Timing */ /* PXA3xx */ #define SSPSP_EDMYSTRT(x) ((x) << 26) /* Extended Dummy Start */ #define SSPSP_EDMYSTOP(x) ((x) << 28) /* Extended Dummy Stop */ #define SSPSP_TIMING_MASK (0x7f8001f0) -#define SSACD_SCDB (1 << 3) /* SSPSYSCLK Divider Bypass */ -#define SSACD_ACPS(x) ((x) << 4) /* Audio clock PLL select */ #define SSACD_ACDS(x) ((x) << 0) /* Audio clock divider select */ #define SSACD_ACDS_1 (0) #define SSACD_ACDS_2 (1) @@ -174,18 +175,24 @@ #define SSACD_ACDS_8 (3) #define SSACD_ACDS_16 (4) #define SSACD_ACDS_32 (5) +#define SSACD_SCDB BIT(3) /* SSPSYSCLK Divider Bypass */ #define SSACD_SCDB_4X (0) #define SSACD_SCDB_1X (1) -#define SSACD_SCDX8 (1 << 7) /* SYSCLK division ratio select */ +#define SSACD_ACPS(x) ((x) << 4) /* Audio clock PLL select */ +#define SSACD_SCDX8 BIT(7) /* SYSCLK division ratio select */ /* LPSS SSP */ #define SSITF 0x44 /* TX FIFO trigger level */ +#define SSITF_TxHiThresh(x) (((x) - 1) << 0) #define SSITF_TxLoThresh(x) (((x) - 1) << 8) -#define SSITF_TxHiThresh(x) ((x) - 1) #define SSIRF 0x48 /* RX FIFO trigger level */ #define SSIRF_RxThresh(x) ((x) - 1) +/* LPT/WPT SSP */ +#define SSCR2 (0x40) /* SSP Command / Status 2 */ +#define SSPSP2 (0x44) /* SSP Programmable Serial Protocol 2 */ + enum pxa_ssp_type { SSP_UNDEFINED = 0, PXA25x_SSP, /* pxa 210, 250, 255, 26x */ |