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/*
* This file is part of the flashrom project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __BITBANG_SPI_H__
#define __BITBANG_SPI_H__ 1
struct bitbang_spi_master {
/* Note that CS# is active low, so val=0 means the chip is active. */
void (*set_cs) (int val, void *data);
void (*set_sck) (int val, void *data);
void (*set_mosi) (int val, void *data);
int (*get_miso) (void *data);
void (*request_bus) (void *data);
void (*release_bus) (void *data);
/* optional functions to optimize xfers */
void (*set_sck_set_mosi) (int sck, int mosi, void *data);
int (*set_sck_get_miso) (int sck, void *data);
/* optional functions for dual/quad i/o */
void (*set_sck_set_dual_io) (int sck, int io, void *data);
void (*set_sck_set_quad_io) (int sck, int io, void *data);
void (*set_idle_io) (void *data);
int (*set_sck_get_dual_io) (int sck, void *data);
int (*set_sck_get_quad_io) (int sck, void *data);
/* Length of half a clock period in usecs. */
unsigned int half_period;
};
int register_spi_bitbang_master(const struct bitbang_spi_master *, void *data);
#endif /* !__BITBANG_SPI_H__ */
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