diff options
Diffstat (limited to 'drivers/spi/spi-loongson.h')
| -rw-r--r-- | drivers/spi/spi-loongson.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/spi/spi-loongson.h b/drivers/spi/spi-loongson.h new file mode 100644 index 000000000000..35f95b161842 --- /dev/null +++ b/drivers/spi/spi-loongson.h @@ -0,0 +1,49 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* Header File for Loongson SPI Driver. */ +/* Copyright (C) 2023 Loongson Technology Corporation Limited */ + +#ifndef __LINUX_SPI_LOONGSON_H +#define __LINUX_SPI_LOONGSON_H + +#include <linux/bits.h> +#include <linux/pm.h> +#include <linux/types.h> + +#define LOONGSON_SPI_SPCR_REG 0x00 +#define LOONGSON_SPI_SPSR_REG 0x01 +#define LOONGSON_SPI_FIFO_REG 0x02 +#define LOONGSON_SPI_SPER_REG 0x03 +#define LOONGSON_SPI_PARA_REG 0x04 +#define LOONGSON_SPI_SFCS_REG 0x05 +#define LOONGSON_SPI_TIMI_REG 0x06 + +/* Bits definition for Loongson SPI register */ +#define LOONGSON_SPI_PARA_MEM_EN BIT(0) +#define LOONGSON_SPI_SPCR_CPHA BIT(2) +#define LOONGSON_SPI_SPCR_CPOL BIT(3) +#define LOONGSON_SPI_SPCR_SPE BIT(6) +#define LOONGSON_SPI_SPSR_RFEMPTY BIT(0) +#define LOONGSON_SPI_SPSR_WCOL BIT(6) +#define LOONGSON_SPI_SPSR_SPIF BIT(7) + +struct device; +struct spi_controller; + +struct loongson_spi { + struct spi_controller *controller; + void __iomem *base; + int cs_active; + unsigned int hz; + unsigned char spcr; + unsigned char sper; + unsigned char spsr; + unsigned char para; + unsigned char sfcs; + unsigned char timi; + unsigned int mode; + u64 clk_rate; +}; + +int loongson_spi_init_controller(struct device *dev, void __iomem *reg); +extern const struct dev_pm_ops loongson_spi_dev_pm_ops; +#endif /* __LINUX_SPI_LOONGSON_H */ |