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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Google, Inc.
*
* 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; version 2 of the License.
*
* 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 _DEVICE_I2C_BUS_H_
#define _DEVICE_I2C_BUS_H_
#include <stdint.h>
#include <device/i2c.h>
#include <device/device.h>
/* I2C bus operation for ramstage drivers */
struct i2c_bus_operations {
/*
* This is an SOC specific method that can be provided to translate the
* 'struct device' for an I2C controller into a unique I2C bus number.
* Returns -1 if the bus number for this device cannot be determined.
*/
int (*dev_to_bus)(struct device *dev);
};
/* Return I2C bus number for provided device, -1 if not found */
int i2c_dev_find_bus(struct device *dev);
/* Variants of I2C helper functions that take a device instead of bus number */
int i2c_dev_transfer(struct device *dev, struct i2c_msg *segments, int count);
int i2c_dev_readb(struct device *dev, uint8_t reg, uint8_t *data);
int i2c_dev_writeb(struct device *dev, uint8_t reg, uint8_t data);
int i2c_dev_read_bytes(struct device *dev, uint8_t reg, uint8_t *data, int len);
int i2c_dev_read_raw(struct device *dev, uint8_t *data, int len);
int i2c_dev_write_raw(struct device *dev, uint8_t *data, int len);
#endif /* _DEVICE_I2C_BUS_H_ */
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