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// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2024 Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
#include <stdlib.h>
#include "common.h"
static void free_str(gpointer data)
{
GString *str = data;
g_string_free(str, TRUE);
}
int gpiocli_set_main(int argc, char **argv)
{
static const gchar *const summary =
"Set values of one or more GPIO lines.";
static const gchar *const description =
"If -r/--request is specified then all the lines must belong to the same\n"
"request (and - by extension - the same chip).";
const gchar *request_name = NULL, *chip_path, *req_path;
g_autoptr(GpiodbusObject) chip_obj = NULL;
g_autoptr(GpiodbusObject) req_obj = NULL;
g_autoptr(GPtrArray) line_names = NULL;
g_autoptr(GArray) values = NULL;
g_autoptr(GError) err = NULL;
g_auto(GStrv) lines = NULL;
GpiodbusRequest *request;
GVariantBuilder builder;
GpiodbusLine *line;
gsize num_lines, i;
GString *line_name;
gboolean ret;
guint offset;
gint val;
const GOptionEntry opts[] = {
{
.long_name = "request",
.short_name = 'r',
.flags = G_OPTION_FLAG_NONE,
.arg = G_OPTION_ARG_STRING,
.arg_data = &request_name,
.description = "restrict scope to a particular request",
.arg_description = "<request>",
},
{
.long_name = G_OPTION_REMAINING,
.flags = G_OPTION_FLAG_NONE,
.arg = G_OPTION_ARG_STRING_ARRAY,
.arg_data = &lines,
.arg_description = "<line1=value1> [line2=value2] ...",
},
{ }
};
parse_options(opts, summary, description, &argc, &argv);
if (!lines)
die_parsing_opts("at least one line value must be specified");
num_lines = g_strv_length(lines);
line_names = g_ptr_array_new_full(num_lines, free_str);
values = g_array_sized_new(FALSE, TRUE, sizeof(gint), num_lines);
for (i = 0; i < num_lines; i++) {
g_auto(GStrv) tokens = NULL;
tokens = g_strsplit(lines[i], "=", 2);
if (g_strv_length(tokens) != 2)
die_parsing_opts("line must have a single value assigned");
g_ptr_array_add(line_names, g_string_new(tokens[0]));
val = output_value_from_str(tokens[1]);
g_array_append_val(values, val);
}
check_manager();
if (request_name) {
g_autoptr(GVariant) arg_values = NULL;
g_autoptr(GArray) offsets = NULL;
req_obj = get_request_obj(request_name);
request = gpiodbus_object_peek_request(req_obj);
chip_path = gpiodbus_request_get_chip_path(request);
chip_obj = get_chip_obj_by_path(chip_path);
offsets = g_array_sized_new(FALSE, TRUE, sizeof(guint),
num_lines);
for (i = 0; i < num_lines; i++) {
g_autoptr(GpiodbusObject) line_obj = NULL;
line_name = g_ptr_array_index(line_names, i);
line_obj = get_line_obj_by_name_for_chip(chip_obj,
line_name->str);
if (!line_obj)
die("Line not found: %s\n", line_name->str);
line = gpiodbus_object_peek_line(line_obj);
offset = gpiodbus_line_get_offset(line);
g_array_append_val(offsets, offset);
}
g_variant_builder_init(&builder, G_VARIANT_TYPE_ARRAY);
for (i = 0; i < num_lines; i++) {
g_variant_builder_add(&builder, "{ui}",
g_array_index(offsets, guint, i),
g_array_index(values, gint, i));
}
arg_values = g_variant_ref_sink(
g_variant_builder_end(&builder));
ret = gpiodbus_request_call_set_values_sync(
request, arg_values,
G_DBUS_CALL_FLAGS_NONE,
-1, NULL, &err);
if (!ret)
die_gerror(err, "Failed to set line values");
return EXIT_SUCCESS;
}
for (i = 0; i < num_lines; i++) {
g_autoptr(GpiodbusRequest) req_proxy = NULL;
g_autoptr(GpiodbusObject) line_obj = NULL;
g_autoptr(GVariant) arg_values = NULL;
line_name = g_ptr_array_index(line_names, i);
ret = get_line_obj_by_name(line_name->str, &line_obj, NULL);
if (!ret)
die("Line not found: %s\n", line_name->str);
line = gpiodbus_object_peek_line(line_obj);
req_path = gpiodbus_line_get_request_path(line);
if (!gpiodbus_line_get_managed(line))
die("Line '%s' not managed by gpio-manager, must be requested first",
line_name->str);
req_proxy = gpiodbus_request_proxy_new_for_bus_sync(
G_BUS_TYPE_SYSTEM,
G_DBUS_PROXY_FLAGS_NONE,
"io.gpiod1", req_path,
NULL, &err);
if (err)
die_gerror(err, "Failed to get D-Bus proxy for '%s'",
req_path);
offset = gpiodbus_line_get_offset(line);
g_variant_builder_init(&builder, G_VARIANT_TYPE_ARRAY);
g_variant_builder_add(&builder, "{ui}", offset,
g_array_index(values, gint, i));
arg_values = g_variant_ref_sink(
g_variant_builder_end(&builder));
ret = gpiodbus_request_call_set_values_sync(
req_proxy, arg_values,
G_DBUS_CALL_FLAGS_NONE, -1,
NULL, &err);
if (!ret)
die_gerror(err, "Failed to set line values");
}
return EXIT_SUCCESS;
}
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