1#include "drmP.h"
  2#include <linux/usb.h>
  3
  4#ifdef CONFIG_USB
  5int drm_get_usb_dev(struct usb_interface *interface,
  6		    const struct usb_device_id *id,
  7		    struct drm_driver *driver)
  8{
  9	struct drm_device *dev;
 10	struct usb_device *usbdev;
 11	int ret;
 12
 13	DRM_DEBUG("\n");
 14
 15	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 16	if (!dev)
 17		return -ENOMEM;
 18
 19	usbdev = interface_to_usbdev(interface);
 20	dev->usbdev = usbdev;
 21	dev->dev = &usbdev->dev;
 22
 23	mutex_lock(&drm_global_mutex);
 24
 25	ret = drm_fill_in_dev(dev, NULL, driver);
 26	if (ret) {
 27		printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
 28		goto err_g1;
 29	}
 30
 31	usb_set_intfdata(interface, dev);
 32	ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
 33	if (ret)
 34		goto err_g1;
 35
 36	ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
 37	if (ret)
 38		goto err_g2;
 39
 40	if (dev->driver->load) {
 41		ret = dev->driver->load(dev, 0);
 42		if (ret)
 43			goto err_g3;
 44	}
 45
 46	/* setup the grouping for the legacy output */
 47	ret = drm_mode_group_init_legacy_group(dev,
 48					       &dev->primary->mode_group);
 49	if (ret)
 50		goto err_g3;
 51
 52	list_add_tail(&dev->driver_item, &driver->device_list);
 53
 54	mutex_unlock(&drm_global_mutex);
 55
 56	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
 57		 driver->name, driver->major, driver->minor, driver->patchlevel,
 58		 driver->date, dev->primary->index);
 59
 60	return 0;
 61
 62err_g3:
 63	drm_put_minor(&dev->primary);
 64err_g2:
 65	drm_put_minor(&dev->control);
 66err_g1:
 67	kfree(dev);
 68	mutex_unlock(&drm_global_mutex);
 69	return ret;
 70
 71}
 72EXPORT_SYMBOL(drm_get_usb_dev);
 73
 74static int drm_usb_get_irq(struct drm_device *dev)
 75{
 76	return 0;
 77}
 78
 79static const char *drm_usb_get_name(struct drm_device *dev)
 80{
 81	return "USB";
 82}
 83
 84static int drm_usb_set_busid(struct drm_device *dev,
 85			       struct drm_master *master)
 86{
 87	return 0;
 88}
 89
 90static struct drm_bus drm_usb_bus = {
 91	.bus_type = DRIVER_BUS_USB,
 92	.get_irq = drm_usb_get_irq,
 93	.get_name = drm_usb_get_name,
 94	.set_busid = drm_usb_set_busid,
 95};
 96    
 97int drm_usb_init(struct drm_driver *driver, struct usb_driver *udriver)
 98{
 99	int res;
100	DRM_DEBUG("\n");
101
102	INIT_LIST_HEAD(&driver->device_list);
103	driver->kdriver.usb = udriver;
104	driver->bus = &drm_usb_bus;
105
106	res = usb_register(udriver);
107	return res;
108}
109EXPORT_SYMBOL(drm_usb_init);
110
111void drm_usb_exit(struct drm_driver *driver,
112		  struct usb_driver *udriver)
113{
114	usb_deregister(udriver);
115}
116EXPORT_SYMBOL(drm_usb_exit);
117#endif