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Commit e0297598 authored by Kent Gibson's avatar Kent Gibson Committed by Bartosz Golaszewski
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selftests: gpio: remove obsolete gpio-mockup-chardev.c 

GPIO selftests have changed to new gpio-mockup-cdev helper, so remove
old gpio-mockup-chardev helper.
Signed-off-by: default avatarKent Gibson <warthog618@gmail.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarBartosz Golaszewski <bgolaszewski@baylibre.com>
parent 8bc395a6
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tools/testing/selftests/gpio/gpio-mockup-chardev.c deleted 100644 → 0
View file @ 8bc395a6
// SPDX-License-Identifier: GPL-2.0-only
/*
* GPIO chardev test helper
*
* Copyright (C) 2016 Bamvor Jian Zhang
*/
#define _GNU_SOURCE
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <getopt.h>
#include <sys/ioctl.h>
#include <libmount.h>
#include <err.h>
#include <dirent.h>
#include <linux/gpio.h>
#include "../../../gpio/gpio-utils.h"
#define CONSUMER "gpio-selftest"
#define GC_NUM 10
enum direction {
OUT,
IN
};
static int get_debugfs(char **path)
{
struct libmnt_context *cxt;
struct libmnt_table *tb;
struct libmnt_iter *itr = NULL;
struct libmnt_fs *fs;
int found = 0, ret;
cxt = mnt_new_context();
if (!cxt)
err(EXIT_FAILURE, "libmount context allocation failed");
itr = mnt_new_iter(MNT_ITER_FORWARD);
if (!itr)
err(EXIT_FAILURE, "failed to initialize libmount iterator");
if (mnt_context_get_mtab(cxt, &tb))
err(EXIT_FAILURE, "failed to read mtab");
while (mnt_table_next_fs(tb, itr, &fs) == 0) {
const char *type = mnt_fs_get_fstype(fs);
if (!strcmp(type, "debugfs")) {
found = 1;
break;
}
}
if (found) {
ret = asprintf(path, "%s/gpio", mnt_fs_get_target(fs));
if (ret < 0)
err(EXIT_FAILURE, "failed to format string");
}
mnt_free_iter(itr);
mnt_free_context(cxt);
if (!found)
return -1;
return 0;
}
static int gpio_debugfs_get(const char *consumer, int *dir, int *value)
{
char *debugfs;
FILE *f;
char *line = NULL;
size_t len = 0;
char *cur;
int found = 0;
if (get_debugfs(&debugfs) != 0)
err(EXIT_FAILURE, "debugfs is not mounted");
f = fopen(debugfs, "r");
if (!f)
err(EXIT_FAILURE, "read from gpio debugfs failed");
/*
* gpio-2 ( |gpio-selftest ) in lo
*/
while (getline(&line, &len, f) != -1) {
cur = strstr(line, consumer);
if (cur == NULL)
continue;
cur = strchr(line, ')');
if (!cur)
continue;
cur += 2;
if (!strncmp(cur, "out", 3)) {
*dir = OUT;
cur += 4;
} else if (!strncmp(cur, "in", 2)) {
*dir = IN;
cur += 4;
}
if (!strncmp(cur, "hi", 2))
*value = 1;
else if (!strncmp(cur, "lo", 2))
*value = 0;
found = 1;
break;
}
free(debugfs);
fclose(f);
free(line);
if (!found)
return -1;
return 0;
}
static struct gpiochip_info *list_gpiochip(const char *gpiochip_name, int *ret)
{
struct gpiochip_info *cinfo;
struct gpiochip_info *current;
const struct dirent *ent;
DIR *dp;
char *chrdev_name;
int fd;
int i = 0;
cinfo = calloc(sizeof(struct gpiochip_info) * 4, GC_NUM + 1);
if (!cinfo)
err(EXIT_FAILURE, "gpiochip_info allocation failed");
current = cinfo;
dp = opendir("/dev");
if (!dp) {
*ret = -errno;
goto error_out;
} else {
*ret = 0;
}
while (ent = readdir(dp), ent) {
if (check_prefix(ent->d_name, "gpiochip")) {
*ret = asprintf(&chrdev_name, "/dev/%s", ent->d_name);
if (*ret < 0)
goto error_out;
fd = open(chrdev_name, 0);
if (fd == -1) {
*ret = -errno;
fprintf(stderr, "Failed to open %s\n",
chrdev_name);
goto error_close_dir;
}
*ret = ioctl(fd, GPIO_GET_CHIPINFO_IOCTL, current);
if (*ret == -1) {
perror("Failed to issue CHIPINFO IOCTL\n");
goto error_close_dir;
}
close(fd);
if (strcmp(current->label, gpiochip_name) == 0
|| check_prefix(current->label, gpiochip_name)) {
*ret = 0;
current++;
i++;
}
}
}
if ((!*ret && i == 0) || *ret < 0) {
free(cinfo);
cinfo = NULL;
}
if (!*ret && i > 0) {
cinfo = realloc(cinfo, sizeof(struct gpiochip_info) * 4 * i);
*ret = i;
}
error_close_dir:
closedir(dp);
error_out:
if (*ret < 0)
err(EXIT_FAILURE, "list gpiochip failed: %s", strerror(*ret));
return cinfo;
}
int gpio_pin_test(struct gpiochip_info *cinfo, int line, int flag, int value)
{
struct gpiohandle_data data;
unsigned int lines[] = {line};
int fd;
int debugfs_dir = IN;
int debugfs_value = 0;
int ret;
data.values[0] = value;
ret = gpiotools_request_linehandle(cinfo->name, lines, 1, flag, &data,
CONSUMER);
if (ret < 0)
goto fail_out;
else
fd = ret;
ret = gpio_debugfs_get(CONSUMER, &debugfs_dir, &debugfs_value);
if (ret) {
ret = -EINVAL;
goto fail_out;
}
if (flag & GPIOHANDLE_REQUEST_INPUT) {
if (debugfs_dir != IN) {
errno = -EINVAL;
ret = -errno;
}
} else if (flag & GPIOHANDLE_REQUEST_OUTPUT) {
if (flag & GPIOHANDLE_REQUEST_ACTIVE_LOW)
debugfs_value = !debugfs_value;
if (!(debugfs_dir == OUT && value == debugfs_value)) {
errno = -EINVAL;
ret = -errno;
}
}
gpiotools_release_linehandle(fd);
fail_out:
if (ret)
err(EXIT_FAILURE, "gpio<%s> line<%d> test flag<0x%x> value<%d>",
cinfo->name, line, flag, value);
return ret;
}
void gpio_pin_tests(struct gpiochip_info *cinfo, unsigned int line)
{
printf("line<%d>", line);
gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 0);
printf(".");
gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 1);
printf(".");
gpio_pin_test(cinfo, line,
GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW,
0);
printf(".");
gpio_pin_test(cinfo, line,
GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW,
1);
printf(".");
gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_INPUT, 0);
printf(".");
}
/*
* ./gpio-mockup-chardev gpio_chip_name_prefix is_valid_gpio_chip
* Return 0 if successful or exit with EXIT_FAILURE if test failed.
* gpio_chip_name_prefix: The prefix of gpiochip you want to test. E.g.
* gpio-mockup
* is_valid_gpio_chip: Whether the gpio_chip is valid. 1 means valid,
* 0 means invalid which could not be found by
* list_gpiochip.
*/
int main(int argc, char *argv[])
{
char *prefix;
int valid;
struct gpiochip_info *cinfo;
struct gpiochip_info *current;
int i;
int ret;
if (argc < 3) {
printf("Usage: %s prefix is_valid", argv[0]);
exit(EXIT_FAILURE);
}
prefix = argv[1];
valid = strcmp(argv[2], "true") == 0 ? 1 : 0;
printf("Test gpiochip %s: ", prefix);
cinfo = list_gpiochip(prefix, &ret);
if (!cinfo) {
if (!valid && ret == 0) {
printf("Invalid test successful\n");
ret = 0;
goto out;
} else {
ret = -EINVAL;
goto out;
}
} else if (cinfo && !valid) {
ret = -EINVAL;
goto out;
}
current = cinfo;
for (i = 0; i < ret; i++) {
gpio_pin_tests(current, 0);
gpio_pin_tests(current, current->lines - 1);
gpio_pin_tests(current, random() % current->lines);
current++;
}
ret = 0;
printf("successful\n");
out:
if (ret)
fprintf(stderr, "gpio<%s> test failed\n", prefix);
if (cinfo)
free(cinfo);
if (ret)
exit(EXIT_FAILURE);
return ret;
}
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