// SPDX-License-Identifier: GPL-2.0-only /* * Marvell Armada-3700 SPI controller driver * * Copyright (C) 2016 Marvell Ltd. * * Author: Wilson Ding <[email protected]> * Author: Romain Perier <[email protected]> */ #include <linux/clk.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pinctrl/consumer.h> #include <linux/spi/spi.h> #define DRIVER_NAME … #define A3700_SPI_MAX_SPEED_HZ … #define A3700_SPI_MAX_PRESCALE … #define A3700_SPI_TIMEOUT … /* SPI Register Offest */ #define A3700_SPI_IF_CTRL_REG … #define A3700_SPI_IF_CFG_REG … #define A3700_SPI_DATA_OUT_REG … #define A3700_SPI_DATA_IN_REG … #define A3700_SPI_IF_INST_REG … #define A3700_SPI_IF_ADDR_REG … #define A3700_SPI_IF_RMODE_REG … #define A3700_SPI_IF_HDR_CNT_REG … #define A3700_SPI_IF_DIN_CNT_REG … #define A3700_SPI_IF_TIME_REG … #define A3700_SPI_INT_STAT_REG … #define A3700_SPI_INT_MASK_REG … /* A3700_SPI_IF_CTRL_REG */ #define A3700_SPI_EN … #define A3700_SPI_ADDR_NOT_CONFIG … #define A3700_SPI_WFIFO_OVERFLOW … #define A3700_SPI_WFIFO_UNDERFLOW … #define A3700_SPI_RFIFO_OVERFLOW … #define A3700_SPI_RFIFO_UNDERFLOW … #define A3700_SPI_WFIFO_FULL … #define A3700_SPI_WFIFO_EMPTY … #define A3700_SPI_RFIFO_FULL … #define A3700_SPI_RFIFO_EMPTY … #define A3700_SPI_WFIFO_RDY … #define A3700_SPI_RFIFO_RDY … #define A3700_SPI_XFER_RDY … #define A3700_SPI_XFER_DONE … /* A3700_SPI_IF_CFG_REG */ #define A3700_SPI_WFIFO_THRS … #define A3700_SPI_RFIFO_THRS … #define A3700_SPI_AUTO_CS … #define A3700_SPI_DMA_RD_EN … #define A3700_SPI_FIFO_MODE … #define A3700_SPI_SRST … #define A3700_SPI_XFER_START … #define A3700_SPI_XFER_STOP … #define A3700_SPI_INST_PIN … #define A3700_SPI_ADDR_PIN … #define A3700_SPI_DATA_PIN1 … #define A3700_SPI_DATA_PIN0 … #define A3700_SPI_FIFO_FLUSH … #define A3700_SPI_RW_EN … #define A3700_SPI_CLK_POL … #define A3700_SPI_CLK_PHA … #define A3700_SPI_BYTE_LEN … #define A3700_SPI_CLK_PRESCALE … #define A3700_SPI_CLK_PRESCALE_MASK … #define A3700_SPI_CLK_EVEN_OFFS … #define A3700_SPI_WFIFO_THRS_BIT … #define A3700_SPI_RFIFO_THRS_BIT … #define A3700_SPI_FIFO_THRS_MASK … #define A3700_SPI_DATA_PIN_MASK … /* A3700_SPI_IF_HDR_CNT_REG */ #define A3700_SPI_DUMMY_CNT_BIT … #define A3700_SPI_DUMMY_CNT_MASK … #define A3700_SPI_RMODE_CNT_BIT … #define A3700_SPI_RMODE_CNT_MASK … #define A3700_SPI_ADDR_CNT_BIT … #define A3700_SPI_ADDR_CNT_MASK … #define A3700_SPI_INSTR_CNT_BIT … #define A3700_SPI_INSTR_CNT_MASK … /* A3700_SPI_IF_TIME_REG */ #define A3700_SPI_CLK_CAPT_EDGE … struct a3700_spi { … }; static u32 spireg_read(struct a3700_spi *a3700_spi, u32 offset) { … } static void spireg_write(struct a3700_spi *a3700_spi, u32 offset, u32 data) { … } static void a3700_spi_auto_cs_unset(struct a3700_spi *a3700_spi) { … } static void a3700_spi_activate_cs(struct a3700_spi *a3700_spi, unsigned int cs) { … } static void a3700_spi_deactivate_cs(struct a3700_spi *a3700_spi, unsigned int cs) { … } static int a3700_spi_pin_mode_set(struct a3700_spi *a3700_spi, unsigned int pin_mode, bool receiving) { … } static void a3700_spi_fifo_mode_set(struct a3700_spi *a3700_spi, bool enable) { … } static void a3700_spi_mode_set(struct a3700_spi *a3700_spi, unsigned int mode_bits) { … } static void a3700_spi_clock_set(struct a3700_spi *a3700_spi, unsigned int speed_hz) { … } static void a3700_spi_bytelen_set(struct a3700_spi *a3700_spi, unsigned int len) { … } static int a3700_spi_fifo_flush(struct a3700_spi *a3700_spi) { … } static void a3700_spi_init(struct a3700_spi *a3700_spi) { … } static irqreturn_t a3700_spi_interrupt(int irq, void *dev_id) { … } static bool a3700_spi_wait_completion(struct spi_device *spi) { … } static bool a3700_spi_transfer_wait(struct spi_device *spi, unsigned int bit_mask) { … } static void a3700_spi_fifo_thres_set(struct a3700_spi *a3700_spi, unsigned int bytes) { … } static void a3700_spi_transfer_setup(struct spi_device *spi, struct spi_transfer *xfer) { … } static void a3700_spi_set_cs(struct spi_device *spi, bool enable) { … } static void a3700_spi_header_set(struct a3700_spi *a3700_spi) { … } static int a3700_is_wfifo_full(struct a3700_spi *a3700_spi) { … } static int a3700_spi_fifo_write(struct a3700_spi *a3700_spi) { … } static int a3700_is_rfifo_empty(struct a3700_spi *a3700_spi) { … } static int a3700_spi_fifo_read(struct a3700_spi *a3700_spi) { … } static void a3700_spi_transfer_abort_fifo(struct a3700_spi *a3700_spi) { … } static int a3700_spi_prepare_message(struct spi_controller *host, struct spi_message *message) { … } static int a3700_spi_transfer_one_fifo(struct spi_controller *host, struct spi_device *spi, struct spi_transfer *xfer) { … } static int a3700_spi_transfer_one_full_duplex(struct spi_controller *host, struct spi_device *spi, struct spi_transfer *xfer) { … } static int a3700_spi_transfer_one(struct spi_controller *host, struct spi_device *spi, struct spi_transfer *xfer) { … } static int a3700_spi_unprepare_message(struct spi_controller *host, struct spi_message *message) { … } static const struct of_device_id a3700_spi_dt_ids[] = …; MODULE_DEVICE_TABLE(of, a3700_spi_dt_ids); static int a3700_spi_probe(struct platform_device *pdev) { … } static struct platform_driver a3700_spi_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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