162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0+ */ 262306a36Sopenharmony_ci/* Header File for Loongson SPI Driver. */ 362306a36Sopenharmony_ci/* Copyright (C) 2023 Loongson Technology Corporation Limited */ 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci#ifndef __LINUX_SPI_LOONGSON_H 662306a36Sopenharmony_ci#define __LINUX_SPI_LOONGSON_H 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#include <linux/bits.h> 962306a36Sopenharmony_ci#include <linux/pm.h> 1062306a36Sopenharmony_ci#include <linux/types.h> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ci#define LOONGSON_SPI_SPCR_REG 0x00 1362306a36Sopenharmony_ci#define LOONGSON_SPI_SPSR_REG 0x01 1462306a36Sopenharmony_ci#define LOONGSON_SPI_FIFO_REG 0x02 1562306a36Sopenharmony_ci#define LOONGSON_SPI_SPER_REG 0x03 1662306a36Sopenharmony_ci#define LOONGSON_SPI_PARA_REG 0x04 1762306a36Sopenharmony_ci#define LOONGSON_SPI_SFCS_REG 0x05 1862306a36Sopenharmony_ci#define LOONGSON_SPI_TIMI_REG 0x06 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci/* Bits definition for Loongson SPI register */ 2162306a36Sopenharmony_ci#define LOONGSON_SPI_PARA_MEM_EN BIT(0) 2262306a36Sopenharmony_ci#define LOONGSON_SPI_SPCR_CPHA BIT(2) 2362306a36Sopenharmony_ci#define LOONGSON_SPI_SPCR_CPOL BIT(3) 2462306a36Sopenharmony_ci#define LOONGSON_SPI_SPCR_SPE BIT(6) 2562306a36Sopenharmony_ci#define LOONGSON_SPI_SPSR_RFEMPTY BIT(0) 2662306a36Sopenharmony_ci#define LOONGSON_SPI_SPSR_WCOL BIT(6) 2762306a36Sopenharmony_ci#define LOONGSON_SPI_SPSR_SPIF BIT(7) 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_cistruct device; 3062306a36Sopenharmony_cistruct spi_controller; 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_cistruct loongson_spi { 3362306a36Sopenharmony_ci struct spi_controller *controller; 3462306a36Sopenharmony_ci void __iomem *base; 3562306a36Sopenharmony_ci int cs_active; 3662306a36Sopenharmony_ci unsigned int hz; 3762306a36Sopenharmony_ci unsigned char spcr; 3862306a36Sopenharmony_ci unsigned char sper; 3962306a36Sopenharmony_ci unsigned char spsr; 4062306a36Sopenharmony_ci unsigned char para; 4162306a36Sopenharmony_ci unsigned char sfcs; 4262306a36Sopenharmony_ci unsigned char timi; 4362306a36Sopenharmony_ci unsigned int mode; 4462306a36Sopenharmony_ci u64 clk_rate; 4562306a36Sopenharmony_ci}; 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_ciint loongson_spi_init_controller(struct device *dev, void __iomem *reg); 4862306a36Sopenharmony_ciextern const struct dev_pm_ops loongson_spi_dev_pm_ops; 4962306a36Sopenharmony_ci#endif /* __LINUX_SPI_LOONGSON_H */ 50