1 files changed, 126 insertions, 0 deletions
diff --git a/linux-core/drm_pm.c b/linux-core/drm_pm.c
new file mode 100644
index 00000000..ea801bda
--- /dev/null
+++ b/linux-core/drm_pm.c
@@ -0,0 +1,126 @@
+/**
+ * \file drm_pm.h 
+ * Power management support
+ *
+ * \author José Fonseca <jrfonseca@tungstengraphics.com>
+ */
+
+/*
+ * Copyright 2004 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+
+#include <linux/device.h>
+#include <linux/sysdev.h>
+
+static int drm_suspend(struct sys_device *sysdev, u32 state)
+{
+	drm_device_t *dev = (drm_device_t *)sysdev;
+	
+	DRM_DEBUG("%s state=%d\n", __FUNCTION__, state);
+	
+        if (dev->driver->power)
+		return dev->driver->power(dev, state);
+	else
+		return 0;
+}
+
+static int drm_resume(struct sys_device *sysdev)
+{
+	drm_device_t *dev = (drm_device_t *)sysdev;
+	
+	DRM_DEBUG("%s\n", __FUNCTION__);
+	
+        if (dev->driver->power)
+		return dev->driver->power(dev, 0);
+	else
+		return 0;
+}
+
+static struct sysdev_class drm_sysdev_class = {
+	set_kset_name("drm"),
+	.resume		= drm_resume,
+	.suspend	= drm_suspend,
+};
+
+
+/**
+ * Initialize the Power Management data.
+ * 
+ * \param dev DRM device.
+ * \return zero on success or a negative value on failure.
+ */
+int drm_pm_setup(drm_device_t *dev)
+{
+	int error;
+	
+	DRM_DEBUG("%s\n", __FUNCTION__);
+	
+	dev->sysdev.id = dev->primary.minor;
+	dev->sysdev.cls = &drm_sysdev_class;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4)
+	error = sys_device_register(&dev->sysdev);
+#else
+	error = sysdev_register(&dev->sysdev);
+#endif
+	if(!error)
+		dev->sysdev_registered = 1;
+	return error;
+}
+
+/**
+ * Cleanup the Power Management resources.
+ *
+ * \param dev DRM device.
+ */
+void drm_pm_takedown(drm_device_t *dev)
+{
+	DRM_DEBUG("%s\n", __FUNCTION__);
+	
+	if(dev->sysdev_registered) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4)
+		sys_device_unregister(&dev->sysdev);
+#else
+		sysdev_unregister(&dev->sysdev);
+#endif
+		dev->sysdev_registered = 0;
+	}
+}
+
+int drm_pm_init(void)
+{
+	DRM_DEBUG("%s\n", __FUNCTION__);
+	
+	return sysdev_class_register(&drm_sysdev_class);
+}
+
+void drm_pm_cleanup(void)
+{
+	DRM_DEBUG("%s\n", __FUNCTION__);
+	
+	sysdev_class_unregister(&drm_sysdev_class);
+}