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/*-
* Copyright (c) 2003-2012 Broadcom Corporation
* All Rights Reserved
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef __OPENCORE_I2C_H__
#define __OPENCORE_I2C_H__
/* I2C specific registers */
#define OC_I2C_PRESCALE_LO_REG 0x00
#define OC_I2C_PRESCALE_HI_REG 0x01
#define OC_I2C_CTRL_REG 0x02
#define OC_I2C_TRANSMIT_REG 0x03 /* tx and rx - same reg */
#define OC_I2C_RECV_REG 0x03 /* tx and rx - same reg */
#define OC_I2C_DATA_REG 0x03 /* tx and rx - same reg */
#define OC_I2C_CMD_REG 0x04 /* cmd and status - same reg */
#define OC_I2C_STATUS_REG 0x04 /* cmd and status - same reg */
#define XLP_I2C_CLKFREQ 133333333 /* XLP 133 MHz IO clock */
#define XLP_I2C_FREQ 100000 /* default 100kHz */
#define I2C_TIMEOUT 500000
/*
* These defines pertain to the OpenCores
* I2C Master Host Controller used in XLP
*/
#define OC_PRESCALER_LO 0
#define OC_PRESCALER_HI 1
#define OC_CONTROL 2
#define OC_CONTROL_EN 0x80
#define OC_CONTROL_IEN 0x40
#define OC_DATA 3 /* Data TX & RX Reg */
#define OC_COMMAND 4
#define OC_COMMAND_START 0x90
#define OC_COMMAND_STOP 0x40
#define OC_COMMAND_READ 0x20
#define OC_COMMAND_WRITE 0x10
#define OC_COMMAND_RDACK 0x20
#define OC_COMMAND_RDNACK 0x28
#define OC_COMMAND_IACK 0x01 /* Not used */
#define OC_STATUS 4 /* Same as 'command' */
#define OC_STATUS_NACK 0x80 /* Did not get an ACK */
#define OC_STATUS_BUSY 0x40
#define OC_STATUS_AL 0x20 /* Arbitration Lost */
#define OC_STATUS_TIP 0x02 /* Transfer in Progress */
#define OC_STATUS_IF 0x01 /* Intr. Pending Flag */
#endif
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