1/* SPDX-License-Identifier: GPL-2.0+ */ 2/* Header File for Loongson SPI Driver. */ 3/* Copyright (C) 2023 Loongson Technology Corporation Limited */ 4 5#ifndef __LINUX_SPI_LOONGSON_H 6#define __LINUX_SPI_LOONGSON_H 7 8#include <linux/bits.h> 9#include <linux/pm.h> 10#include <linux/types.h> 11 12#define LOONGSON_SPI_SPCR_REG 0x00 13#define LOONGSON_SPI_SPSR_REG 0x01 14#define LOONGSON_SPI_FIFO_REG 0x02 15#define LOONGSON_SPI_SPER_REG 0x03 16#define LOONGSON_SPI_PARA_REG 0x04 17#define LOONGSON_SPI_SFCS_REG 0x05 18#define LOONGSON_SPI_TIMI_REG 0x06 19 20/* Bits definition for Loongson SPI register */ 21#define LOONGSON_SPI_PARA_MEM_EN BIT(0) 22#define LOONGSON_SPI_SPCR_CPHA BIT(2) 23#define LOONGSON_SPI_SPCR_CPOL BIT(3) 24#define LOONGSON_SPI_SPCR_SPE BIT(6) 25#define LOONGSON_SPI_SPSR_RFEMPTY BIT(0) 26#define LOONGSON_SPI_SPSR_WCOL BIT(6) 27#define LOONGSON_SPI_SPSR_SPIF BIT(7) 28 29struct device; 30struct spi_controller; 31 32struct loongson_spi { 33 struct spi_controller *controller; 34 void __iomem *base; 35 int cs_active; 36 unsigned int hz; 37 unsigned char spcr; 38 unsigned char sper; 39 unsigned char spsr; 40 unsigned char para; 41 unsigned char sfcs; 42 unsigned char timi; 43 unsigned int mode; 44 u64 clk_rate; 45}; 46 47int loongson_spi_init_controller(struct device *dev, void __iomem *reg); 48extern const struct dev_pm_ops loongson_spi_dev_pm_ops; 49#endif /* __LINUX_SPI_LOONGSON_H */ 50