1ab68cbb08
Add a Simple polled driver iicoc for the OpenCores I2C controller. This is used in Netlogic XLP processors. Submitted by: Sreekanth M. S. (kanthms at netlogicmicro com)
79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
/*-
|
|
* 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
|