linux_spi.c File Reference

Implementation of Linux platform SPI Driver. More...

#include "no_os_error.h"
#include "no_os_spi.h"
#include "no_os_alloc.h"
#include "linux_spi.h"
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <linux/spi/spidev.h>

Include dependency graph for linux_spi.c:

Classes
struct	linux_spi_desc
	Linux platform specific SPI descriptor. More...

Functions
int32_t	linux_spi_init (struct no_os_spi_desc **desc, const struct no_os_spi_init_param *param)
	Initialize the SPI communication peripheral. More...
int32_t	linux_spi_write_and_read (struct no_os_spi_desc *desc, uint8_t *data, uint16_t bytes_number)
	Write and read data to/from SPI. More...
int32_t	linux_spi_remove (struct no_os_spi_desc *desc)
	Free the resources allocated by linux_spi_init(). More...

Variables
const struct no_os_spi_platform_ops	linux_spi_ops
	Linux platform specific SPI platform ops structure. More...

Detailed Description

Implementation of Linux platform SPI Driver.

Author

Dragos Bogdan (drago.nosp@m.s.bo.nosp@m.gdan@.nosp@m.anal.nosp@m.og.co.nosp@m.m)

Copyright 2020(c) Analog Devices, Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• 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.
• Neither the name of Analog Devices, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
• The use of this software may or may not infringe the patent rights of one or more patent holders. This license does not release you from the requirement that you obtain separate licenses from these patent holders to use this software.
• Use of the software either in source or binary form, must be run on or directly connected to an Analog Devices Inc. component.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, 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.

Function Documentation

linux_spi_init()

int32_t linux_spi_init	(	struct no_os_spi_desc **	desc,
		const struct no_os_spi_init_param *	param
	)

Initialize the SPI communication peripheral.

Parameters

desc	- The SPI descriptor.
param	- The structure that contains the SPI parameters.

Returns

0 in case of success, -1 otherwise.

linux_spi_remove()

int32_t linux_spi_remove

(

struct no_os_spi_desc *

desc

)

Free the resources allocated by linux_spi_init().

Parameters

desc	- The SPI descriptor.

Returns

0 in case of success, -1 otherwise.

linux_spi_write_and_read()

int32_t linux_spi_write_and_read	(	struct no_os_spi_desc *	desc,
		uint8_t *	data,
		uint16_t	bytes_number
	)

Write and read data to/from SPI.

Parameters

desc	- The SPI descriptor.
data	- The buffer with the transmitted/received data.
bytes_number	- Number of bytes to write/read.

Returns

0 in case of success, -1 otherwise.

Variable Documentation

linux_spi_ops

const struct no_os_spi_platform_ops linux_spi_ops

Initial value:

= {
    .init = &linux_spi_init,
    .write_and_read = &linux_spi_write_and_read,
    .remove = &linux_spi_remove,
    .transfer = &linux_spi_transfer
}

Linux platform specific SPI platform ops structure.

Linux specific SPI platform ops structure.