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

source code of linux/drivers/spi/spi-loongson.h