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// Copyright 2009 Segher Boessenkool <segher@kernel.crashing.org>
// Licensed under the terms of the GNU GPL, version 2
// http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
#ifndef _I2C_H
#define _I2C_H
#include "types.h"
// Device.
struct i2c_device {
struct i2c_device *next; // devices on this bus
int (*address)(struct i2c_device *dev, u8 address); // returns ack
int (*write)(struct i2c_device *dev, u8 data); // returns ack
u8 (*read)(struct i2c_device *dev); // returns data
void (*read_ack)(struct i2c_device *dev, int ack);
};
// Bus.
struct i2c_bus {
struct i2c_device *devices; // all devices on this bus
struct i2c_device *device; // currently addressed device
};
// EEPROM device.
void i2c_eeprom_create(struct i2c_bus *bus, u32 size, u8 address,
const char *file_name);
// Bitbang bus.
struct i2c_bus *i2c_bitbang_bus_create(void);
int i2c_bitbang(struct i2c_bus *bus, int sda, int scl);
#endif
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