projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 6c7a8640 YZ |
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 | ||
| 29 | struct device; | |
| 30 | struct spi_controller; | |
| 31 | ||
| 32 | struct 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 | ||
| 47 | int loongson_spi_init_controller(struct device *dev, void __iomem *reg); | |
| 48 | extern const struct dev_pm_ops loongson_spi_dev_pm_ops; | |
| 49 | #endif /* __LINUX_SPI_LOONGSON_H */ |