1537078d8f
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
81 lines
2.8 KiB
C
81 lines
2.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2003-2012 Broadcom Corporation
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* All Rights Reserved
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __OPENCORE_I2C_H__
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#define __OPENCORE_I2C_H__
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/* I2C specific registers */
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#define OC_I2C_PRESCALE_LO_REG 0x00
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#define OC_I2C_PRESCALE_HI_REG 0x01
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#define OC_I2C_CTRL_REG 0x02
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#define OC_I2C_TRANSMIT_REG 0x03 /* tx and rx - same reg */
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#define OC_I2C_RECV_REG 0x03 /* tx and rx - same reg */
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#define OC_I2C_DATA_REG 0x03 /* tx and rx - same reg */
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#define OC_I2C_CMD_REG 0x04 /* cmd and status - same reg */
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#define OC_I2C_STATUS_REG 0x04 /* cmd and status - same reg */
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#define XLP_I2C_CLKFREQ 133333333 /* XLP 133 MHz IO clock */
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#define XLP_I2C_FREQ 100000 /* default 100kHz */
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#define I2C_TIMEOUT 500000
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/*
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* These defines pertain to the OpenCores
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* I2C Master Host Controller used in XLP
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*/
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#define OC_PRESCALER_LO 0
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#define OC_PRESCALER_HI 1
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#define OC_CONTROL 2
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#define OC_CONTROL_EN 0x80
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#define OC_CONTROL_IEN 0x40
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#define OC_DATA 3 /* Data TX & RX Reg */
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#define OC_COMMAND 4
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#define OC_COMMAND_START 0x90
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#define OC_COMMAND_STOP 0x40
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#define OC_COMMAND_READ 0x20
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#define OC_COMMAND_WRITE 0x10
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#define OC_COMMAND_RDACK 0x20
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#define OC_COMMAND_RDNACK 0x28
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#define OC_COMMAND_IACK 0x01 /* Not used */
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#define OC_STATUS 4 /* Same as 'command' */
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#define OC_STATUS_NACK 0x80 /* Did not get an ACK */
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#define OC_STATUS_BUSY 0x40
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#define OC_STATUS_AL 0x20 /* Arbitration Lost */
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#define OC_STATUS_TIP 0x02 /* Transfer in Progress */
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#define OC_STATUS_IF 0x01 /* Intr. Pending Flag */
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#endif
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