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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
* Driver for MCF52xx's I2C interface
* 2005-02-17 hubble@mochine.com
*
*/
#ifndef _I2C_COLDFIRE_H
#define _I2C_COLDFIRE_H
#include "cpu.h"
void i2c_init(void);
int i2c_read (volatile unsigned char *iface, unsigned char addr,
unsigned char *buf, int count);
int i2c_write(volatile unsigned char *iface, unsigned char addr,
const unsigned char *buf, int count);
void i2c_close(void);
void i2c_adjust_prescale(int multiplier);
#define I2C_IFACE_0 ((volatile unsigned char *)&MADR)
#define I2C_IFACE_1 ((volatile unsigned char *)&MADR2)
#define MAX_LOOP 0x100 /* TODO: select a better value */
/* PLLCR control */
#define QSPISEL (1 << 11) /* Selects QSPI or I2C interface */
/* Offsets to I2C registers from base address */
#define O_MADR 0x00 /* Slave Address */
#define O_MFDR 0x04 /* Frequency divider */
#define O_MBCR 0x08 /* Control register */
#define O_MBSR 0x0c /* Status register */
#define O_MBDR 0x10 /* Data register */
/* MBSR - Status register */
#define ICF (1 << 7) /* Transfer Complete */
#define IAAS (1 << 6) /* Addressed As Alave */
#define IBB (1 << 5) /* Bus Busy */
#define IAL (1 << 4) /* Arbitration Lost */
#define SRW (1 << 2) /* Slave R/W */
#define IIF (1 << 1) /* I2C Interrupt */
#define RXAK (1 << 0) /* No Ack bit */
/* MBCR - Control register */
#define IEN (1 << 7) /* I2C Enable */
#define IIEN (1 << 6) /* Interrupt Enable */
#define MSTA (1 << 5) /* Master/Slave select */
#define MTX (1 << 4) /* Transmit/Receive */
#define TXAK (1 << 3) /* Transfer ACK */
#define RSTA (1 << 2) /* Restart.. */
#endif
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