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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
* @ingroup i2c
*/
/*
* COPYRIGHT (c) 2007 Cobham Gaisler AB
* with parts from the RTEMS MPC83xx I2C driver (c) 2007 Embedded Brains GmbH.
*
* 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER 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.
*/
#ifndef _I2CMST_H
#define _I2CMST_H
/**
* @defgroup i2c I2C-master
*
* @ingroup RTEMSBSPsSharedGRLIB
*
* @brief Driver for GRLIB port of OpenCores I2C-master
*
* @{
*/
#include <rtems/libi2c.h>
#include "ambapp.h"
#ifdef __cplusplus
extern "C" {
#endif
/* I2C-master operational registers */
typedef struct gr_i2cmst_regs {
volatile unsigned int prescl; /* Prescale register */
volatile unsigned int ctrl; /* Control register */
volatile unsigned int tdrd; /* Transmit and Receive registers */
volatile unsigned int cmdsts; /* Command and Status registers */
} gr_i2cmst_regs_t;
/* Control (CTRL) register */
#define GRI2C_CTRL_EN 0x00000080 /* Enable core */
#define GRI2C_CTRL_IEN 0x00000040 /* Interrupt enable */
/* Command (CMD) register */
#define GRI2C_CMD_STA 0x00000080 /* Generate START condition */
#define GRI2C_CMD_STO 0x00000040 /* Generate STOP condition */
#define GRI2C_CMD_RD 0x00000020 /* Read from slave */
#define GRI2C_CMD_WR 0x00000010 /* Write to slave */
#define GRI2C_CMD_ACK 0x00000008 /* Acknowledge */
#define GRI2C_CMD_IACK 0x00000001 /* Interrupt acknowledge */
/* Status (STS) register */
#define GRI2C_STS_RXACK 0x00000080 /* Receive acknowledge */
#define GRI2C_STS_BUSY 0x00000040 /* I2C-bus busy */
#define GRI2C_STS_AL 0x00000020 /* Arbitration lost */
#define GRI2C_STS_TIP 0x00000002 /* Transfer in progress */
#define GRI2C_STS_IF 0x00000001 /* Interrupt flag */
#define GRI2C_STATUS_IDLE 0x00000000
/* Register I2CMST driver to Driver Manager */
void i2cmst_register_drv (void);
#ifdef __cplusplus
}
#endif
/** @} */
#endif /* _I2CMST_H */
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