// SPDX-License-Identifier: GPL-2.0-only /* * Marvell Orion SPI controller driver * * Author: Shadi Ammouri <[email protected]> * Copyright (C) 2007-2008 Marvell Ltd. */ #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/platform_device.h> #include <linux/err.h> #include <linux/io.h> #include <linux/spi/spi.h> #include <linux/module.h> #include <linux/pm_runtime.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/clk.h> #include <linux/sizes.h> #include <asm/unaligned.h> #define DRIVER_NAME … /* Runtime PM autosuspend timeout: PM is fairly light on this driver */ #define SPI_AUTOSUSPEND_TIMEOUT … /* Some SoCs using this driver support up to 8 chip selects. * It is up to the implementer to only use the chip selects * that are available. */ #define ORION_NUM_CHIPSELECTS … #define ORION_SPI_WAIT_RDY_MAX_LOOP … #define ORION_SPI_IF_CTRL_REG … #define ORION_SPI_IF_CONFIG_REG … #define ORION_SPI_IF_RXLSBF … #define ORION_SPI_IF_TXLSBF … #define ORION_SPI_DATA_OUT_REG … #define ORION_SPI_DATA_IN_REG … #define ORION_SPI_INT_CAUSE_REG … #define ORION_SPI_TIMING_PARAMS_REG … /* Register for the "Direct Mode" */ #define SPI_DIRECT_WRITE_CONFIG_REG … #define ORION_SPI_TMISO_SAMPLE_MASK … #define ORION_SPI_TMISO_SAMPLE_1 … #define ORION_SPI_TMISO_SAMPLE_2 … #define ORION_SPI_MODE_CPOL … #define ORION_SPI_MODE_CPHA … #define ORION_SPI_IF_8_16_BIT_MODE … #define ORION_SPI_CLK_PRESCALE_MASK … #define ARMADA_SPI_CLK_PRESCALE_MASK … #define ORION_SPI_MODE_MASK … #define ORION_SPI_CS_MASK … #define ORION_SPI_CS_SHIFT … #define ORION_SPI_CS(cs) … enum orion_spi_type { … }; struct orion_spi_dev { … }; struct orion_direct_acc { … }; struct orion_child_options { … }; struct orion_spi { … }; #ifdef CONFIG_PM static int orion_spi_runtime_suspend(struct device *dev); static int orion_spi_runtime_resume(struct device *dev); #endif static inline void __iomem *spi_reg(struct orion_spi *orion_spi, u32 reg) { … } static inline void orion_spi_setbits(struct orion_spi *orion_spi, u32 reg, u32 mask) { … } static inline void orion_spi_clrbits(struct orion_spi *orion_spi, u32 reg, u32 mask) { … } static int orion_spi_baudrate_set(struct spi_device *spi, unsigned int speed) { … } static void orion_spi_mode_set(struct spi_device *spi) { … } static void orion_spi_50mhz_ac_timing_erratum(struct spi_device *spi, unsigned int speed) { … } /* * called only when no transfer is active on the bus */ static int orion_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) { … } static void orion_spi_set_cs(struct spi_device *spi, bool enable) { … } static inline int orion_spi_wait_till_ready(struct orion_spi *orion_spi) { … } static inline int orion_spi_write_read_8bit(struct spi_device *spi, const u8 **tx_buf, u8 **rx_buf) { … } static inline int orion_spi_write_read_16bit(struct spi_device *spi, const u16 **tx_buf, u16 **rx_buf) { … } static unsigned int orion_spi_write_read(struct spi_device *spi, struct spi_transfer *xfer) { … } static int orion_spi_transfer_one(struct spi_controller *host, struct spi_device *spi, struct spi_transfer *t) { … } static int orion_spi_setup(struct spi_device *spi) { … } static int orion_spi_reset(struct orion_spi *orion_spi) { … } static const struct orion_spi_dev orion_spi_dev_data = …; static const struct orion_spi_dev armada_370_spi_dev_data = …; static const struct orion_spi_dev armada_xp_spi_dev_data = …; static const struct orion_spi_dev armada_375_spi_dev_data = …; static const struct orion_spi_dev armada_380_spi_dev_data = …; static const struct of_device_id orion_spi_of_match_table[] = …; MODULE_DEVICE_TABLE(of, orion_spi_of_match_table); static int orion_spi_probe(struct platform_device *pdev) { … } static void orion_spi_remove(struct platform_device *pdev) { … } MODULE_ALIAS(…) …; #ifdef CONFIG_PM static int orion_spi_runtime_suspend(struct device *dev) { … } static int orion_spi_runtime_resume(struct device *dev) { … } #endif static const struct dev_pm_ops orion_spi_pm_ops = …; static struct platform_driver orion_spi_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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