// SPDX-License-Identifier: GPL-2.0 // // spi-mt7621.c -- MediaTek MT7621 SPI controller driver // // Copyright (C) 2011 Sergiy <[email protected]> // Copyright (C) 2011-2013 Gabor Juhos <[email protected]> // Copyright (C) 2014-2015 Felix Fietkau <[email protected]> // // Some parts are based on spi-orion.c: // Author: Shadi Ammouri <[email protected]> // Copyright (C) 2007-2008 Marvell Ltd. #include <linux/clk.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/reset.h> #include <linux/spi/spi.h> #define DRIVER_NAME … /* in usec */ #define RALINK_SPI_WAIT_MAX_LOOP … /* SPISTAT register bit field */ #define SPISTAT_BUSY … #define MT7621_SPI_TRANS … #define SPITRANS_BUSY … #define MT7621_SPI_OPCODE … #define MT7621_SPI_DATA0 … #define MT7621_SPI_DATA4 … #define SPI_CTL_TX_RX_CNT_MASK … #define SPI_CTL_START … #define MT7621_SPI_MASTER … #define MASTER_MORE_BUFMODE … #define MASTER_FULL_DUPLEX … #define MASTER_RS_CLK_SEL … #define MASTER_RS_CLK_SEL_SHIFT … #define MASTER_RS_SLAVE_SEL … #define MT7621_SPI_MOREBUF … #define MT7621_SPI_POLAR … #define MT7621_SPI_SPACE … #define MT7621_CPHA … #define MT7621_CPOL … #define MT7621_LSB_FIRST … #define MT7621_NATIVE_CS_COUNT … struct mt7621_spi { … }; static inline struct mt7621_spi *spidev_to_mt7621_spi(struct spi_device *spi) { … } static inline u32 mt7621_spi_read(struct mt7621_spi *rs, u32 reg) { … } static inline void mt7621_spi_write(struct mt7621_spi *rs, u32 reg, u32 val) { … } static void mt7621_spi_set_native_cs(struct spi_device *spi, bool enable) { … } static int mt7621_spi_prepare(struct spi_device *spi, unsigned int speed) { … } static inline int mt7621_spi_wait_till_ready(struct mt7621_spi *rs) { … } static int mt7621_spi_prepare_message(struct spi_controller *host, struct spi_message *m) { … } static void mt7621_spi_read_half_duplex(struct mt7621_spi *rs, int rx_len, u8 *buf) { … } static inline void mt7621_spi_flush(struct mt7621_spi *rs) { … } static void mt7621_spi_write_half_duplex(struct mt7621_spi *rs, int tx_len, const u8 *buf) { … } static int mt7621_spi_transfer_one(struct spi_controller *host, struct spi_device *spi, struct spi_transfer *t) { … } static int mt7621_spi_setup(struct spi_device *spi) { … } static const struct of_device_id mt7621_spi_match[] = …; MODULE_DEVICE_TABLE(of, mt7621_spi_match); static int mt7621_spi_probe(struct platform_device *pdev) { … } MODULE_ALIAS(…) …; static struct platform_driver mt7621_spi_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux