system_manager, libobmc-intf: Add power GPIO configuration interface
This adds a dbus call (in org.openbmc.managers.System) and C binding (in
libopenbmc-intf) to read a POWER_CONFIG from the Python system
configuration that abstracts GPIO functionality (power good, reset, etc)
from their net names in GPIO_CONFIG.
This should eventually replace machine-specific patches to op-pwrctl
that define their own power and reset lines.
Change-Id: I56eaaf60ef852b68124e4a765942243ad17d06ac
Signed-off-by: Xo Wang <xow@google.com>
diff --git a/libopenbmc_intf/power_gpio.c b/libopenbmc_intf/power_gpio.c
new file mode 100644
index 0000000..3f4b5a8
--- /dev/null
+++ b/libopenbmc_intf/power_gpio.c
@@ -0,0 +1,123 @@
+/**
+ * Copyright © 2016 Google Inc.
+ * Copyright © 2016 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "power_gpio.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <glib.h>
+
+gboolean read_power_gpio(GDBusConnection *connection, PowerGpio *power_gpio)
+{
+ GDBusProxy *proxy;
+ GError *error;
+ GVariant *value;
+ gchar *power_good_in_name;
+ GVariantIter *power_up_outs_iter;
+ GVariantIter *reset_outs_iter;
+ gchar *power_up_out_name;
+ gchar *reset_out_name;
+ gboolean power_up_polarity;
+ gboolean reset_out_polarity;
+ int i;
+
+ proxy = g_dbus_proxy_new_sync(connection,
+ G_DBUS_PROXY_FLAGS_NONE,
+ NULL, /* GDBusInterfaceInfo */
+ "org.openbmc.managers.System", /* name */
+ "/org/openbmc/managers/System", /* object path */
+ "org.openbmc.managers.System", /* interface */
+ NULL, /* GCancellable */
+ &error);
+ if(error != NULL) {
+ fprintf(stderr, "Unable to create proxy: %s\n", error->message);
+ g_error_free(error);
+ return FALSE;
+ }
+
+ value = g_dbus_proxy_call_sync(proxy,
+ "getPowerConfiguration",
+ NULL,
+ G_DBUS_CALL_FLAGS_NONE,
+ -1,
+ NULL,
+ &error);
+ if(error != NULL) {
+ fprintf(stderr, "Power GPIO: call to getPowerConfiguration failed: %s\n",
+ error->message);
+ g_error_free(error);
+ return FALSE;
+ }
+
+ g_assert(value != NULL);
+ memset(power_gpio, 0, sizeof(*power_gpio));
+ g_variant_get(value, "(&sa(sb)a(sb))", &power_good_in_name,
+ &power_up_outs_iter, &reset_outs_iter);
+
+ g_print("Power GPIO power good input %s\n", power_good_in_name);
+ power_gpio->power_good_in.name = g_strdup(power_good_in_name);
+ power_gpio->num_power_up_outs = g_variant_iter_n_children(
+ power_up_outs_iter);
+ g_print("Power GPIO %d power_up outputs\n",
+ power_gpio->num_power_up_outs);
+ power_gpio->power_up_outs = g_malloc0_n(power_gpio->num_power_up_outs,
+ sizeof(GPIO));
+ power_gpio->power_up_pols = g_malloc0_n(power_gpio->num_power_up_outs,
+ sizeof(gboolean));
+ for(i = 0; g_variant_iter_next(power_up_outs_iter, "(&sb)",
+ &power_up_out_name, &power_up_polarity);
+ i++) {
+ g_print("Power GPIO power_up[%d] = %s active %s\n", i,
+ power_up_out_name, power_up_polarity ? "HIGH" : "LOW");
+ power_gpio->power_up_outs[i].name = g_strdup(power_up_out_name);
+ power_gpio->power_up_pols[i] = power_up_polarity;
+ }
+ power_gpio->num_reset_outs = g_variant_iter_n_children(reset_outs_iter);
+ g_print("Power GPIO %d reset outputs\n", power_gpio->num_reset_outs);
+ power_gpio->reset_outs = g_malloc0_n(power_gpio->num_reset_outs, sizeof(GPIO));
+ power_gpio->reset_pols = g_malloc0_n(power_gpio->num_reset_outs,
+ sizeof(gboolean));
+ for(i = 0; g_variant_iter_next(reset_outs_iter, "(&sb)", &reset_out_name,
+ &reset_out_polarity); i++) {
+ g_print("Power GPIO reset[%d] = %s active %s\n", i, reset_out_name,
+ reset_out_polarity ? "HIGH" : "LOW");
+ power_gpio->reset_outs[i].name = g_strdup(reset_out_name);
+ power_gpio->reset_pols[i] = reset_out_polarity;
+ }
+
+ g_variant_iter_free(power_up_outs_iter);
+ g_variant_iter_free(reset_outs_iter);
+ g_variant_unref(value);
+
+ return TRUE;
+}
+
+void free_power_gpio(PowerGpio *power_gpio) {
+ int i;
+ g_free(power_gpio->power_good_in.name);
+ for(i = 0; i < power_gpio->num_power_up_outs; i++) {
+ g_free(power_gpio->power_up_outs[i].name);
+ }
+ g_free(power_gpio->power_up_outs);
+ g_free(power_gpio->power_up_pols);
+ for(i = 0; i < power_gpio->num_reset_outs; i++) {
+ g_free(power_gpio->reset_outs[i].name);
+ }
+ g_free(power_gpio->reset_outs);
+ g_free(power_gpio->reset_pols);
+}