drivers/spi/spi-loongson.h

   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 */