mirror of
https://github.com/torvalds/linux.git
synced 2024-12-06 11:01:43 +00:00
cd58310d77
Constify two char pointers and a struct in Documentation/spi/spidev_test.c. Acked-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
203 lines
4.1 KiB
C
203 lines
4.1 KiB
C
/*
|
|
* SPI testing utility (using spidev driver)
|
|
*
|
|
* Copyright (c) 2007 MontaVista Software, Inc.
|
|
* Copyright (c) 2007 Anton Vorontsov <avorontsov@ru.mvista.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License.
|
|
*
|
|
* Cross-compile with cross-gcc -I/path/to/cross-kernel/include
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <getopt.h>
|
|
#include <fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
#include <linux/types.h>
|
|
#include <linux/spi/spidev.h>
|
|
|
|
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
|
|
|
|
static void pabort(const char *s)
|
|
{
|
|
perror(s);
|
|
abort();
|
|
}
|
|
|
|
static const char *device = "/dev/spidev1.1";
|
|
static uint8_t mode;
|
|
static uint8_t bits = 8;
|
|
static uint32_t speed = 500000;
|
|
static uint16_t delay;
|
|
|
|
static void transfer(int fd)
|
|
{
|
|
int ret;
|
|
uint8_t tx[] = {
|
|
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
|
0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
|
|
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
|
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
|
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
|
0xDE, 0xAD, 0xBE, 0xEF, 0xBA, 0xAD,
|
|
0xF0, 0x0D,
|
|
};
|
|
uint8_t rx[ARRAY_SIZE(tx)] = {0, };
|
|
struct spi_ioc_transfer tr = {
|
|
.tx_buf = (unsigned long)tx,
|
|
.rx_buf = (unsigned long)rx,
|
|
.len = ARRAY_SIZE(tx),
|
|
.delay_usecs = delay,
|
|
.speed_hz = speed,
|
|
.bits_per_word = bits,
|
|
};
|
|
|
|
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
|
|
if (ret == 1)
|
|
pabort("can't send spi message");
|
|
|
|
for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {
|
|
if (!(ret % 6))
|
|
puts("");
|
|
printf("%.2X ", rx[ret]);
|
|
}
|
|
puts("");
|
|
}
|
|
|
|
void print_usage(const char *prog)
|
|
{
|
|
printf("Usage: %s [-DsbdlHOLC3]\n", prog);
|
|
puts(" -D --device device to use (default /dev/spidev1.1)\n"
|
|
" -s --speed max speed (Hz)\n"
|
|
" -d --delay delay (usec)\n"
|
|
" -b --bpw bits per word \n"
|
|
" -l --loop loopback\n"
|
|
" -H --cpha clock phase\n"
|
|
" -O --cpol clock polarity\n"
|
|
" -L --lsb least significant bit first\n"
|
|
" -C --cs-high chip select active high\n"
|
|
" -3 --3wire SI/SO signals shared\n");
|
|
exit(1);
|
|
}
|
|
|
|
void parse_opts(int argc, char *argv[])
|
|
{
|
|
while (1) {
|
|
static const struct option lopts[] = {
|
|
{ "device", 1, 0, 'D' },
|
|
{ "speed", 1, 0, 's' },
|
|
{ "delay", 1, 0, 'd' },
|
|
{ "bpw", 1, 0, 'b' },
|
|
{ "loop", 0, 0, 'l' },
|
|
{ "cpha", 0, 0, 'H' },
|
|
{ "cpol", 0, 0, 'O' },
|
|
{ "lsb", 0, 0, 'L' },
|
|
{ "cs-high", 0, 0, 'C' },
|
|
{ "3wire", 0, 0, '3' },
|
|
{ NULL, 0, 0, 0 },
|
|
};
|
|
int c;
|
|
|
|
c = getopt_long(argc, argv, "D:s:d:b:lHOLC3", lopts, NULL);
|
|
|
|
if (c == -1)
|
|
break;
|
|
|
|
switch (c) {
|
|
case 'D':
|
|
device = optarg;
|
|
break;
|
|
case 's':
|
|
speed = atoi(optarg);
|
|
break;
|
|
case 'd':
|
|
delay = atoi(optarg);
|
|
break;
|
|
case 'b':
|
|
bits = atoi(optarg);
|
|
break;
|
|
case 'l':
|
|
mode |= SPI_LOOP;
|
|
break;
|
|
case 'H':
|
|
mode |= SPI_CPHA;
|
|
break;
|
|
case 'O':
|
|
mode |= SPI_CPOL;
|
|
break;
|
|
case 'L':
|
|
mode |= SPI_LSB_FIRST;
|
|
break;
|
|
case 'C':
|
|
mode |= SPI_CS_HIGH;
|
|
break;
|
|
case '3':
|
|
mode |= SPI_3WIRE;
|
|
break;
|
|
default:
|
|
print_usage(argv[0]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int ret = 0;
|
|
int fd;
|
|
|
|
parse_opts(argc, argv);
|
|
|
|
fd = open(device, O_RDWR);
|
|
if (fd < 0)
|
|
pabort("can't open device");
|
|
|
|
/*
|
|
* spi mode
|
|
*/
|
|
ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
|
|
if (ret == -1)
|
|
pabort("can't set spi mode");
|
|
|
|
ret = ioctl(fd, SPI_IOC_RD_MODE, &mode);
|
|
if (ret == -1)
|
|
pabort("can't get spi mode");
|
|
|
|
/*
|
|
* bits per word
|
|
*/
|
|
ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
|
|
if (ret == -1)
|
|
pabort("can't set bits per word");
|
|
|
|
ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
|
|
if (ret == -1)
|
|
pabort("can't get bits per word");
|
|
|
|
/*
|
|
* max speed hz
|
|
*/
|
|
ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
|
|
if (ret == -1)
|
|
pabort("can't set max speed hz");
|
|
|
|
ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
|
|
if (ret == -1)
|
|
pabort("can't get max speed hz");
|
|
|
|
printf("spi mode: %d\n", mode);
|
|
printf("bits per word: %d\n", bits);
|
|
printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);
|
|
|
|
transfer(fd);
|
|
|
|
close(fd);
|
|
|
|
return ret;
|
|
}
|