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-rw-r--r--src/linux/up-dock.c186
1 files changed, 186 insertions, 0 deletions
diff --git a/src/linux/up-dock.c b/src/linux/up-dock.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2010 Richard Hughes <richard@hughsie.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <glib-object.h>
+#include <gudev/gudev.h>
+
+#include "up-daemon.h"
+#include "up-dock.h"
+
+struct UpDockPrivate
+{
+ UpDaemon *daemon;
+ GUdevClient *gudev_client;
+ guint poll_id;
+};
+
+G_DEFINE_TYPE (UpDock, up_dock, G_TYPE_OBJECT)
+#define UP_DOCK_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), UP_TYPE_DOCK, UpDockPrivate))
+
+/* the kernel is pretty crap at sending a uevent when the status changes */
+#define UP_DOCK_POLL_TIMEOUT 30
+
+/**
+ * up_dock_device_check:
+ **/
+static gboolean
+up_dock_device_check (GUdevDevice *d)
+{
+ const gchar *status;
+ gboolean ret = FALSE;
+
+ /* Get the boolean state from the kernel -- note that ideally
+ * the property value would be "1" or "true" but now it's
+ * set in stone as ABI. Urgh. */
+ status = g_udev_device_get_sysfs_attr (d, "status");
+ if (status == NULL)
+ goto out;
+ ret = (g_strcmp0 (status, "connected") == 0);
+ g_debug ("graphics device %s is %s",
+ g_udev_device_get_sysfs_path (d),
+ ret ? "on" : "off");
+out:
+ return ret;
+}
+
+/**
+ * up_dock_refresh:
+ **/
+static gboolean
+up_dock_refresh (UpDock *dock)
+{
+ GList *devices;
+ GList *l;
+ GUdevDevice *native;
+ guint count = 0;
+
+ /* the metric we're using here is that a machine is docked when
+ * there is more than one active output */
+ devices = g_udev_client_query_by_subsystem (dock->priv->gudev_client,
+ "drm");
+ for (l = devices; l != NULL; l = l->next) {
+ native = l->data;
+ count += up_dock_device_check (native);
+ }
+ g_list_foreach (devices, (GFunc) g_object_unref, NULL);
+ g_list_free (devices);
+
+ /* update the daemon state, which causes DBus traffic */
+ up_daemon_set_is_docked (dock->priv->daemon, (count > 1));
+
+ return TRUE;
+}
+
+/**
+ * up_dock_poll_cb:
+ **/
+static gboolean
+up_dock_poll_cb (UpDock *dock)
+{
+ g_debug ("Doing the dock refresh");
+ up_dock_refresh (dock);
+ return TRUE;
+}
+
+/**
+ * up_dock_coldplug:
+ **/
+gboolean
+up_dock_coldplug (UpDock *dock, UpDaemon *daemon)
+{
+ /* save daemon */
+ dock->priv->daemon = g_object_ref (daemon);
+ dock->priv->poll_id = g_timeout_add_seconds (UP_DOCK_POLL_TIMEOUT,
+ (GSourceFunc) up_dock_poll_cb,
+ dock);
+ return up_dock_refresh (dock);
+}
+
+
+/**
+ * up_dock_uevent_signal_handler_cb:
+ **/
+static void
+up_dock_uevent_signal_handler_cb (GUdevClient *client, const gchar *action,
+ GUdevDevice *device, gpointer user_data)
+{
+ UpDock *dock = UP_DOCK (user_data);
+ up_dock_refresh (dock);
+}
+
+/**
+ * up_dock_init:
+ **/
+static void
+up_dock_init (UpDock *dock)
+{
+ const gchar *subsystems[] = { "drm", NULL};
+ dock->priv = UP_DOCK_GET_PRIVATE (dock);
+ dock->priv->gudev_client = g_udev_client_new (subsystems);
+ g_signal_connect (dock->priv->gudev_client, "uevent",
+ G_CALLBACK (up_dock_uevent_signal_handler_cb), dock);
+}
+
+/**
+ * up_dock_finalize:
+ **/
+static void
+up_dock_finalize (GObject *object)
+{
+ UpDock *dock;
+
+ g_return_if_fail (object != NULL);
+ g_return_if_fail (UP_IS_DOCK (object));
+
+ dock = UP_DOCK (object);
+ g_return_if_fail (dock->priv != NULL);
+
+ g_object_unref (dock->priv->gudev_client);
+ if (dock->priv->daemon != NULL)
+ g_object_unref (dock->priv->daemon);
+ if (dock->priv->poll_id != 0)
+ g_source_remove (dock->priv->poll_id);
+ G_OBJECT_CLASS (up_dock_parent_class)->finalize (object);
+}
+
+/**
+ * up_dock_class_init:
+ **/
+static void
+up_dock_class_init (UpDockClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ object_class->finalize = up_dock_finalize;
+ g_type_class_add_private (klass, sizeof (UpDockPrivate));
+}
+
+/**
+ * up_dock_new:
+ **/
+UpDock *
+up_dock_new (void)
+{
+ return g_object_new (UP_TYPE_DOCK, NULL);
+}
+