/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (c) 2016 embedded brains GmbH. 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 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 LIBBSP_ARM_ATSAM_ATSAM_I2C_H
#define LIBBSP_ARM_ATSAM_ATSAM_I2C_H
#include <libchip/chip.h>
#include <libchip/include/pio.h>
#include <bsp.h>
#include <rtems/thread.h>
#include <dev/i2c/i2c.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define TWI_AMOUNT_PINS 2
typedef struct {
i2c_bus base;
Twihs *regs;
/* First message and number of messages that have to be processed. */
i2c_msg *msgs;
uint32_t msg_todo;
/* Information about the current transfer. */
bool stop_request;
uint32_t current_msg_todo;
uint8_t *current_msg_byte;
/* Error information that can be returned to the task */
uint32_t err;
uint32_t output_clock;
rtems_binary_semaphore sem;
rtems_vector_number irq;
} atsam_i2c_bus;
int i2c_bus_register_atsam(
const char *bus_path,
Twihs *register_base,
rtems_vector_number irq,
const Pin pins[TWI_AMOUNT_PINS]
);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LIBBSP_ARM_ATSAM_ATSAM_I2C_H */