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/*
* Embedded Linux library
* Copyright (C) 2019 Geanix
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ell/ell.h>
static int print_usage(void)
{
fprintf(stderr,
"usage: %1$s find <name>\n"
" %1$s get (<chip> <line>|<label>)\n"
" %1$s set (<chip> <line>|<label>) <value>\n"
" %1$s chip <chip>\n"
" %1$s line (<chip> <line>|<label>)\n",
program_invocation_short_name);
return -1;
}
static bool find_line(const char *line_label, struct l_gpio_chip **chip,
uint32_t *offset)
{
struct l_gpio_chip *c;
char **chip_names = NULL;
uint32_t o;
if (!line_label)
return false;
chip_names = l_gpio_chips_with_line_label(line_label);
if (l_strv_length(chip_names) != 1) {
l_strfreev(chip_names);
return false;
}
c = l_gpio_chip_new(chip_names[0]);
l_strfreev(chip_names);
if (!c)
return false;
if (!l_gpio_chip_find_line_offset(c, line_label, &o)) {
l_gpio_chip_free(c);
return false;
}
if (chip)
*chip = c;
if (offset)
*offset = o;
return true;
}
static int find(int argc, char **argv)
{
struct l_gpio_chip *chip;
uint32_t offset;
if (argc != 2)
return print_usage();
if (!find_line(argv[1], &chip, &offset))
return -1;
printf("chip: %s\n", l_gpio_chip_get_name(chip));
printf("line: %u\n", offset);
l_gpio_chip_free(chip);
return 0;
}
static int get(int argc, char **argv)
{
struct l_gpio_chip *chip;
struct l_gpio_reader *reader;
uint32_t offset;
uint32_t value;
bool res;
if (argc == 2) {
if (!find_line(argv[1], &chip, &offset))
return -1;
} else if (argc == 3) {
chip = l_gpio_chip_new(argv[1]);
if (!chip)
return -1;
offset = strtoul(argv[2], NULL, 0);
} else {
return print_usage();
}
printf("chip: %s\n", l_gpio_chip_get_name(chip));
printf("line: %u\n", offset);
reader = l_gpio_reader_new(chip, "gpio-test", 1, &offset);
if (!reader) {
l_gpio_chip_free(chip);
return -1;
}
res = l_gpio_reader_get(reader, 1, &value);
l_gpio_reader_free(reader);
l_gpio_chip_free(chip);
if (!res)
return -1;
printf("val: %u\n", value);
return 0;
}
static int set(int argc, char **argv)
{
struct l_gpio_chip *chip;
struct l_gpio_writer *writer;
uint32_t offset;
uint32_t value;
bool res;
if (argc == 3) {
if (!find_line(argv[1], &chip, &offset))
return -1;
value = strtol(argv[2], NULL, 0);
} else if (argc == 4) {
chip = l_gpio_chip_new(argv[1]);
if (!chip)
return -1;
offset = strtoul(argv[2], NULL, 0);
value = strtol(argv[3], NULL, 0);
} else {
return print_usage();
}
printf("chip: %s\n", l_gpio_chip_get_name(chip));
printf("line: %u\n", offset);
writer = l_gpio_writer_new(chip, "gpio-test", 1, &offset, &value);
l_gpio_chip_free(chip);
if (!writer)
return -1;
res = l_gpio_writer_set(writer, 1, &value);
l_gpio_writer_free(writer);
if (!res)
return -1;
printf("val: %u\n", value);
return 0;
}
static int chip(int argc, char **argv)
{
struct l_gpio_chip *chip;
if (argc != 2)
return print_usage();
chip = l_gpio_chip_new(argv[1]);
if (!chip)
return -1;
printf("chip: %s\n", l_gpio_chip_get_name(chip));
printf("label: %s\n", l_gpio_chip_get_label(chip));
printf("lines: %u\n", l_gpio_chip_get_num_lines(chip));
l_gpio_chip_free(chip);
return 0;
}
static int line(int argc, char **argv)
{
struct l_gpio_chip *chip;
uint32_t offset;
char *consumer;
char *label;
if (argc == 2) {
if (!find_line(argv[1], &chip, &offset))
return -1;
} else if (argc == 3) {
chip = l_gpio_chip_new(argv[1]);
if (!chip)
return -1;
offset = strtoul(argv[2], NULL, 0);
} else {
return print_usage();
}
label = l_gpio_chip_get_line_label(chip, offset);
consumer = l_gpio_chip_get_line_consumer(chip, offset);
printf("chip: %s\n", l_gpio_chip_get_name(chip));
printf("line: %u\n", offset);
printf("label: %s\n", label);
printf("consumer: %s\n", consumer);
l_free(consumer);
l_free(label);
l_gpio_chip_free(chip);
return 0;
}
int main(int argc, char **argv)
{
const char *cmd;
if (argc < 2)
return print_usage();
cmd = argv[1];
argc--;
argv++;
if (strcmp(cmd, "get") == 0)
return get(argc, argv);
if (strcmp(cmd, "set") == 0)
return set(argc, argv);
if (strcmp(cmd, "find") == 0)
return find(argc, argv);
if (strcmp(cmd, "chip") == 0)
return chip(argc, argv);
if (strcmp(cmd, "line") == 0)
return line(argc, argv);
return print_usage();
}
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