src/include/spi_bitbang.h

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright 2018 Google LLC
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15 #ifndef _SPI_BITBANG_H_
  16 #define _SPI_BITBANG_H_
  17
  18 #include <types.h>
  19
  20 struct spi_bitbang_ops {
  21         int (*get_miso)(const struct spi_bitbang_ops *ops);
  22         void (*set_mosi)(const struct spi_bitbang_ops *ops, int value);
  23         void (*set_clk)(const struct spi_bitbang_ops *ops, int value);
  24         void (*set_cs)(const struct spi_bitbang_ops *ops, int value);
  25 };
  26
  27 int spi_bitbang_claim_bus(const struct spi_bitbang_ops *ops);
  28 void spi_bitbang_release_bus(const struct spi_bitbang_ops *ops);
  29 int spi_bitbang_xfer(const struct spi_bitbang_ops *ops, const void *dout,
  30                      size_t bytes_out, void *din, size_t bytes_in);
  31
  32 #endif /* _SPI_BITBANG_H_ */