* as published by the Free Software Foundation.
*/
+/* Low-level, core library code. */
+
#include <gpiod.h>
-#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include <poll.h>
#include <errno.h>
-#include <ctype.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
struct gpiod_line **lines;
};
-static bool isuint(const char *str)
-{
- for (; *str && isdigit(*str); str++);
-
- return *str == '\0';
-}
-
struct gpiod_chip * gpiod_chip_open(const char *path)
{
struct gpiod_chip *chip;
return chip;
}
-struct gpiod_chip * gpiod_chip_open_by_name(const char *name)
-{
- struct gpiod_chip *chip;
- char *path;
- int status;
-
- status = asprintf(&path, "/dev/%s", name);
- if (status < 0)
- return NULL;
-
- chip = gpiod_chip_open(path);
- free(path);
-
- return chip;
-}
-
-struct gpiod_chip * gpiod_chip_open_by_number(unsigned int num)
-{
- struct gpiod_chip *chip;
- char *path;
- int status;
-
- status = asprintf(&path, "/dev/gpiochip%u", num);
- if (!status)
- return NULL;
-
- chip = gpiod_chip_open(path);
- free(path);
-
- return chip;
-}
-
-struct gpiod_chip * gpiod_chip_open_by_label(const char *label)
-{
- struct gpiod_chip_iter *iter;
- struct gpiod_chip *chip;
-
- iter = gpiod_chip_iter_new();
- if (!iter)
- return NULL;
-
- gpiod_foreach_chip(iter, chip) {
- if (gpiod_chip_iter_err(iter))
- goto out;
-
- if (strcmp(label, gpiod_chip_label(chip)) == 0) {
- gpiod_chip_iter_free_noclose(iter);
- return chip;
- }
- }
-
-out:
- gpiod_chip_iter_free(iter);
- return NULL;
-}
-
-struct gpiod_chip * gpiod_chip_open_lookup(const char *descr)
-{
- struct gpiod_chip *chip;
-
- if (isuint(descr)) {
- chip = gpiod_chip_open_by_number(strtoul(descr, NULL, 10));
- } else {
- chip = gpiod_chip_open_by_label(descr);
- if (!chip) {
- if (strncmp(descr, "/dev/", 5))
- chip = gpiod_chip_open_by_name(descr);
- else
- chip = gpiod_chip_open(descr);
- }
- }
-
- return chip;
-}
-
void gpiod_chip_close(struct gpiod_chip *chip)
{
struct gpiod_line *line;
return line;
}
-struct gpiod_line *
-gpiod_chip_find_line(struct gpiod_chip *chip, const char *name)
-{
- struct gpiod_line_iter iter;
- struct gpiod_line *line;
-
- gpiod_line_iter_init(&iter, chip);
- gpiod_foreach_line(&iter, line) {
- if (gpiod_line_iter_err(&iter))
- return NULL;
-
- if (strcmp(gpiod_line_name(line), name) == 0)
- return line;
- }
-
- errno = ENOENT;
-
- return NULL;
-}
-
static void line_maybe_update(struct gpiod_line *line)
{
int status;
return gpiod_line_request_bulk(&bulk, config, &default_val);
}
-int gpiod_line_request_input(struct gpiod_line *line, const char *consumer)
-{
- struct gpiod_line_request_config config = {
- .consumer = consumer,
- .request_type = GPIOD_LINE_REQUEST_DIRECTION_INPUT,
- };
-
- return gpiod_line_request(line, &config, 0);
-}
-
-int gpiod_line_request_output(struct gpiod_line *line,
- const char *consumer, int default_val)
-{
- struct gpiod_line_request_config config = {
- .consumer = consumer,
- .request_type = GPIOD_LINE_REQUEST_DIRECTION_OUTPUT,
- };
-
- return gpiod_line_request(line, &config, default_val);
-}
-
-int gpiod_line_request_input_flags(struct gpiod_line *line,
- const char *consumer, int flags)
-{
- struct gpiod_line_request_config config = {
- .consumer = consumer,
- .request_type = GPIOD_LINE_REQUEST_DIRECTION_INPUT,
- .flags = flags,
- };
-
- return gpiod_line_request(line, &config, 0);
-}
-
-int gpiod_line_request_output_flags(struct gpiod_line *line,
- const char *consumer, int flags,
- int default_val)
-{
- struct gpiod_line_request_config config = {
- .consumer = consumer,
- .request_type = GPIOD_LINE_REQUEST_DIRECTION_OUTPUT,
- .flags = flags,
- };
-
- return gpiod_line_request(line, &config, default_val);
-}
-
-static int line_event_request_type(struct gpiod_line *line,
- const char *consumer, int flags, int type)
-{
- struct gpiod_line_request_config config = {
- .consumer = consumer,
- .request_type = type,
- .flags = flags,
- };
-
- return gpiod_line_request(line, &config, 0);
-}
-
-int gpiod_line_request_rising_edge_events(struct gpiod_line *line,
- const char *consumer)
-{
- return line_event_request_type(line, consumer, 0,
- GPIOD_LINE_REQUEST_EVENT_RISING_EDGE);
-}
-
-int gpiod_line_request_falling_edge_events(struct gpiod_line *line,
- const char *consumer)
-{
- return line_event_request_type(line, consumer, 0,
- GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE);
-}
-
-int gpiod_line_request_both_edges_events(struct gpiod_line *line,
- const char *consumer)
-{
- return line_event_request_type(line, consumer, 0,
- GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES);
-}
-
-int gpiod_line_request_rising_edge_events_flags(struct gpiod_line *line,
- const char *consumer,
- int flags)
-{
- return line_event_request_type(line, consumer, flags,
- GPIOD_LINE_REQUEST_EVENT_RISING_EDGE);
-}
-
-int gpiod_line_request_falling_edge_events_flags(struct gpiod_line *line,
- const char *consumer,
- int flags)
-{
- return line_event_request_type(line, consumer, flags,
- GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE);
-}
-
-int gpiod_line_request_both_edges_events_flags(struct gpiod_line *line,
- const char *consumer, int flags)
-{
- return line_event_request_type(line, consumer, flags,
- GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES);
-}
-
static bool line_request_is_direction(int request)
{
return request == GPIOD_LINE_REQUEST_DIRECTION_AS_IS
}
}
-int gpiod_line_request_bulk_input(struct gpiod_line_bulk *bulk,
- const char *consumer)
-{
- struct gpiod_line_request_config config = {
- .consumer = consumer,
- .request_type = GPIOD_LINE_REQUEST_DIRECTION_INPUT,
- };
-
- return gpiod_line_request_bulk(bulk, &config, 0);
-}
-
-int gpiod_line_request_bulk_output(struct gpiod_line_bulk *bulk,
- const char *consumer,
- const int *default_vals)
-{
- struct gpiod_line_request_config config = {
- .consumer = consumer,
- .request_type = GPIOD_LINE_REQUEST_DIRECTION_OUTPUT,
- };
-
- return gpiod_line_request_bulk(bulk, &config, default_vals);
-}
-
-static int line_event_request_type_bulk(struct gpiod_line_bulk *bulk,
- const char *consumer,
- int flags, int type)
-{
- struct gpiod_line_request_config config = {
- .consumer = consumer,
- .request_type = type,
- .flags = flags,
- };
-
- return gpiod_line_request_bulk(bulk, &config, 0);
-}
-
-int gpiod_line_request_bulk_rising_edge_events(struct gpiod_line_bulk *bulk,
- const char *consumer)
-{
- return line_event_request_type_bulk(bulk, consumer, 0,
- GPIOD_LINE_REQUEST_EVENT_RISING_EDGE);
-}
-
-int gpiod_line_request_bulk_falling_edge_events(struct gpiod_line_bulk *bulk,
- const char *consumer)
-{
- return line_event_request_type_bulk(bulk, consumer, 0,
- GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE);
-}
-
-int gpiod_line_request_bulk_both_edges_events(struct gpiod_line_bulk *bulk,
- const char *consumer)
-{
- return line_event_request_type_bulk(bulk, consumer, 0,
- GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES);
-}
-
-int gpiod_line_request_bulk_input_flags(struct gpiod_line_bulk *bulk,
- const char *consumer, int flags)
-{
- struct gpiod_line_request_config config = {
- .consumer = consumer,
- .request_type = GPIOD_LINE_REQUEST_DIRECTION_INPUT,
- .flags = flags,
- };
-
- return gpiod_line_request_bulk(bulk, &config, 0);
-}
-
-int gpiod_line_request_bulk_output_flags(struct gpiod_line_bulk *bulk,
- const char *consumer, int flags,
- const int *default_vals)
-{
- struct gpiod_line_request_config config = {
- .consumer = consumer,
- .request_type = GPIOD_LINE_REQUEST_DIRECTION_OUTPUT,
- .flags = flags,
- };
-
- return gpiod_line_request_bulk(bulk, &config, default_vals);
-}
-
-int gpiod_line_request_bulk_rising_edge_events_flags(
- struct gpiod_line_bulk *bulk,
- const char *consumer, int flags)
-{
- return line_event_request_type_bulk(bulk, consumer, flags,
- GPIOD_LINE_REQUEST_EVENT_RISING_EDGE);
-}
-
-int gpiod_line_request_bulk_falling_edge_events_flags(
- struct gpiod_line_bulk *bulk,
- const char *consumer, int flags)
-{
- return line_event_request_type_bulk(bulk, consumer, flags,
- GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE);
-}
-
-int gpiod_line_request_bulk_both_edges_events_flags(
- struct gpiod_line_bulk *bulk,
- const char *consumer, int flags)
-{
- return line_event_request_type_bulk(bulk, consumer, flags,
- GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES);
-}
-
void gpiod_line_release(struct gpiod_line *line)
{
struct gpiod_line_bulk bulk;
return 0;
}
-struct gpiod_line * gpiod_line_get(const char *device, unsigned int offset)
-{
- struct gpiod_chip *chip;
- struct gpiod_line *line;
-
- chip = gpiod_chip_open_lookup(device);
- if (!chip)
- return NULL;
-
- line = gpiod_chip_get_line(chip, offset);
- if (!line) {
- gpiod_chip_close(chip);
- return NULL;
- }
-
- return line;
-}
-
-struct gpiod_line * gpiod_line_find(const char *name)
-{
- struct gpiod_chip_iter *iter;
- struct gpiod_chip *chip;
- struct gpiod_line *line;
-
- iter = gpiod_chip_iter_new();
- if (!iter)
- return NULL;
-
- gpiod_foreach_chip(iter, chip) {
- if (gpiod_chip_iter_err(iter))
- goto out;
-
- line = gpiod_chip_find_line(chip, name);
- if (line) {
- gpiod_chip_iter_free_noclose(iter);
- return line;
- }
-
- if (errno != ENOENT)
- goto out;
- }
-
- errno = ENOENT;
-
-out:
- gpiod_chip_iter_free(iter);
-
- return NULL;
-}
-
-void gpiod_line_close_chip(struct gpiod_line *line)
-{
- struct gpiod_chip *chip = gpiod_line_get_chip(line);
-
- gpiod_chip_close(chip);
-}
-
int gpiod_line_event_wait(struct gpiod_line *line,
const struct timespec *timeout)
{
--- /dev/null
+/*
+ * This file is part of libgpiod.
+ *
+ * Copyright (C) 2017 Bartosz Golaszewski <bartekgola@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ */
+
+/*
+ * More specific variants of the core API and misc functions that don't need
+ * access to neither the internal library data structures nor the kernel UAPI.
+ */
+
+#include <gpiod.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+static bool isuint(const char *str)
+{
+ for (; *str && isdigit(*str); str++);
+
+ return *str == '\0';
+}
+
+struct gpiod_chip * gpiod_chip_open_by_name(const char *name)
+{
+ struct gpiod_chip *chip;
+ char *path;
+ int status;
+
+ status = asprintf(&path, "/dev/%s", name);
+ if (status < 0)
+ return NULL;
+
+ chip = gpiod_chip_open(path);
+ free(path);
+
+ return chip;
+}
+
+struct gpiod_chip * gpiod_chip_open_by_number(unsigned int num)
+{
+ struct gpiod_chip *chip;
+ char *path;
+ int status;
+
+ status = asprintf(&path, "/dev/gpiochip%u", num);
+ if (!status)
+ return NULL;
+
+ chip = gpiod_chip_open(path);
+ free(path);
+
+ return chip;
+}
+
+struct gpiod_chip * gpiod_chip_open_by_label(const char *label)
+{
+ struct gpiod_chip_iter *iter;
+ struct gpiod_chip *chip;
+
+ iter = gpiod_chip_iter_new();
+ if (!iter)
+ return NULL;
+
+ gpiod_foreach_chip(iter, chip) {
+ if (gpiod_chip_iter_err(iter))
+ goto out;
+
+ if (strcmp(label, gpiod_chip_label(chip)) == 0) {
+ gpiod_chip_iter_free_noclose(iter);
+ return chip;
+ }
+ }
+
+out:
+ gpiod_chip_iter_free(iter);
+ return NULL;
+}
+
+struct gpiod_chip * gpiod_chip_open_lookup(const char *descr)
+{
+ struct gpiod_chip *chip;
+
+ if (isuint(descr)) {
+ chip = gpiod_chip_open_by_number(strtoul(descr, NULL, 10));
+ } else {
+ chip = gpiod_chip_open_by_label(descr);
+ if (!chip) {
+ if (strncmp(descr, "/dev/", 5))
+ chip = gpiod_chip_open_by_name(descr);
+ else
+ chip = gpiod_chip_open(descr);
+ }
+ }
+
+ return chip;
+}
+
+struct gpiod_line *
+gpiod_chip_find_line(struct gpiod_chip *chip, const char *name)
+{
+ struct gpiod_line_iter iter;
+ struct gpiod_line *line;
+
+ gpiod_line_iter_init(&iter, chip);
+ gpiod_foreach_line(&iter, line) {
+ if (gpiod_line_iter_err(&iter))
+ return NULL;
+
+ if (strcmp(gpiod_line_name(line), name) == 0)
+ return line;
+ }
+
+ errno = ENOENT;
+
+ return NULL;
+}
+
+int gpiod_line_request_input(struct gpiod_line *line, const char *consumer)
+{
+ struct gpiod_line_request_config config = {
+ .consumer = consumer,
+ .request_type = GPIOD_LINE_REQUEST_DIRECTION_INPUT,
+ };
+
+ return gpiod_line_request(line, &config, 0);
+}
+
+int gpiod_line_request_output(struct gpiod_line *line,
+ const char *consumer, int default_val)
+{
+ struct gpiod_line_request_config config = {
+ .consumer = consumer,
+ .request_type = GPIOD_LINE_REQUEST_DIRECTION_OUTPUT,
+ };
+
+ return gpiod_line_request(line, &config, default_val);
+}
+
+int gpiod_line_request_input_flags(struct gpiod_line *line,
+ const char *consumer, int flags)
+{
+ struct gpiod_line_request_config config = {
+ .consumer = consumer,
+ .request_type = GPIOD_LINE_REQUEST_DIRECTION_INPUT,
+ .flags = flags,
+ };
+
+ return gpiod_line_request(line, &config, 0);
+}
+
+int gpiod_line_request_output_flags(struct gpiod_line *line,
+ const char *consumer, int flags,
+ int default_val)
+{
+ struct gpiod_line_request_config config = {
+ .consumer = consumer,
+ .request_type = GPIOD_LINE_REQUEST_DIRECTION_OUTPUT,
+ .flags = flags,
+ };
+
+ return gpiod_line_request(line, &config, default_val);
+}
+
+static int line_event_request_type(struct gpiod_line *line,
+ const char *consumer, int flags, int type)
+{
+ struct gpiod_line_request_config config = {
+ .consumer = consumer,
+ .request_type = type,
+ .flags = flags,
+ };
+
+ return gpiod_line_request(line, &config, 0);
+}
+
+int gpiod_line_request_rising_edge_events(struct gpiod_line *line,
+ const char *consumer)
+{
+ return line_event_request_type(line, consumer, 0,
+ GPIOD_LINE_REQUEST_EVENT_RISING_EDGE);
+}
+
+int gpiod_line_request_falling_edge_events(struct gpiod_line *line,
+ const char *consumer)
+{
+ return line_event_request_type(line, consumer, 0,
+ GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE);
+}
+
+int gpiod_line_request_both_edges_events(struct gpiod_line *line,
+ const char *consumer)
+{
+ return line_event_request_type(line, consumer, 0,
+ GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES);
+}
+
+int gpiod_line_request_rising_edge_events_flags(struct gpiod_line *line,
+ const char *consumer,
+ int flags)
+{
+ return line_event_request_type(line, consumer, flags,
+ GPIOD_LINE_REQUEST_EVENT_RISING_EDGE);
+}
+
+int gpiod_line_request_falling_edge_events_flags(struct gpiod_line *line,
+ const char *consumer,
+ int flags)
+{
+ return line_event_request_type(line, consumer, flags,
+ GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE);
+}
+
+int gpiod_line_request_both_edges_events_flags(struct gpiod_line *line,
+ const char *consumer, int flags)
+{
+ return line_event_request_type(line, consumer, flags,
+ GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES);
+}
+
+int gpiod_line_request_bulk_input(struct gpiod_line_bulk *bulk,
+ const char *consumer)
+{
+ struct gpiod_line_request_config config = {
+ .consumer = consumer,
+ .request_type = GPIOD_LINE_REQUEST_DIRECTION_INPUT,
+ };
+
+ return gpiod_line_request_bulk(bulk, &config, 0);
+}
+
+int gpiod_line_request_bulk_output(struct gpiod_line_bulk *bulk,
+ const char *consumer,
+ const int *default_vals)
+{
+ struct gpiod_line_request_config config = {
+ .consumer = consumer,
+ .request_type = GPIOD_LINE_REQUEST_DIRECTION_OUTPUT,
+ };
+
+ return gpiod_line_request_bulk(bulk, &config, default_vals);
+}
+
+static int line_event_request_type_bulk(struct gpiod_line_bulk *bulk,
+ const char *consumer,
+ int flags, int type)
+{
+ struct gpiod_line_request_config config = {
+ .consumer = consumer,
+ .request_type = type,
+ .flags = flags,
+ };
+
+ return gpiod_line_request_bulk(bulk, &config, 0);
+}
+
+int gpiod_line_request_bulk_rising_edge_events(struct gpiod_line_bulk *bulk,
+ const char *consumer)
+{
+ return line_event_request_type_bulk(bulk, consumer, 0,
+ GPIOD_LINE_REQUEST_EVENT_RISING_EDGE);
+}
+
+int gpiod_line_request_bulk_falling_edge_events(struct gpiod_line_bulk *bulk,
+ const char *consumer)
+{
+ return line_event_request_type_bulk(bulk, consumer, 0,
+ GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE);
+}
+
+int gpiod_line_request_bulk_both_edges_events(struct gpiod_line_bulk *bulk,
+ const char *consumer)
+{
+ return line_event_request_type_bulk(bulk, consumer, 0,
+ GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES);
+}
+
+int gpiod_line_request_bulk_input_flags(struct gpiod_line_bulk *bulk,
+ const char *consumer, int flags)
+{
+ struct gpiod_line_request_config config = {
+ .consumer = consumer,
+ .request_type = GPIOD_LINE_REQUEST_DIRECTION_INPUT,
+ .flags = flags,
+ };
+
+ return gpiod_line_request_bulk(bulk, &config, 0);
+}
+
+int gpiod_line_request_bulk_output_flags(struct gpiod_line_bulk *bulk,
+ const char *consumer, int flags,
+ const int *default_vals)
+{
+ struct gpiod_line_request_config config = {
+ .consumer = consumer,
+ .request_type = GPIOD_LINE_REQUEST_DIRECTION_OUTPUT,
+ .flags = flags,
+ };
+
+ return gpiod_line_request_bulk(bulk, &config, default_vals);
+}
+
+int gpiod_line_request_bulk_rising_edge_events_flags(
+ struct gpiod_line_bulk *bulk,
+ const char *consumer, int flags)
+{
+ return line_event_request_type_bulk(bulk, consumer, flags,
+ GPIOD_LINE_REQUEST_EVENT_RISING_EDGE);
+}
+
+int gpiod_line_request_bulk_falling_edge_events_flags(
+ struct gpiod_line_bulk *bulk,
+ const char *consumer, int flags)
+{
+ return line_event_request_type_bulk(bulk, consumer, flags,
+ GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE);
+}
+
+int gpiod_line_request_bulk_both_edges_events_flags(
+ struct gpiod_line_bulk *bulk,
+ const char *consumer, int flags)
+{
+ return line_event_request_type_bulk(bulk, consumer, flags,
+ GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES);
+}
+
+struct gpiod_line * gpiod_line_get(const char *device, unsigned int offset)
+{
+ struct gpiod_chip *chip;
+ struct gpiod_line *line;
+
+ chip = gpiod_chip_open_lookup(device);
+ if (!chip)
+ return NULL;
+
+ line = gpiod_chip_get_line(chip, offset);
+ if (!line) {
+ gpiod_chip_close(chip);
+ return NULL;
+ }
+
+ return line;
+}
+
+struct gpiod_line * gpiod_line_find(const char *name)
+{
+ struct gpiod_chip_iter *iter;
+ struct gpiod_chip *chip;
+ struct gpiod_line *line;
+
+ iter = gpiod_chip_iter_new();
+ if (!iter)
+ return NULL;
+
+ gpiod_foreach_chip(iter, chip) {
+ if (gpiod_chip_iter_err(iter))
+ goto out;
+
+ line = gpiod_chip_find_line(chip, name);
+ if (line) {
+ gpiod_chip_iter_free_noclose(iter);
+ return line;
+ }
+
+ if (errno != ENOENT)
+ goto out;
+ }
+
+ errno = ENOENT;
+
+out:
+ gpiod_chip_iter_free(iter);
+
+ return NULL;
+}
+
+void gpiod_line_close_chip(struct gpiod_line *line)
+{
+ struct gpiod_chip *chip = gpiod_line_get_chip(line);
+
+ gpiod_chip_close(chip);
+}
projects / qemu-gpiodev / libgpiod.git / commitdiff