forked from Imagelibrary/rtems
33f6e34b2d
This patch changes the license to BSD-2 for all source files where the copyright is held by Aeroflex Gaisler, Cobham Gaisler, or Gaisler Research. Some files also includes copyright right statements from OAR and/or embedded Brains in addition to Gaisler. Updates #3053.
94 lines
3.2 KiB
C
94 lines
3.2 KiB
C
/* 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 */
|