1#include <drm/drmP.h>
 2#include <drm/drm_usb.h>
 3#include <linux/usb.h>
 4#include <linux/module.h>
 5
 6int drm_get_usb_dev(struct usb_interface *interface,
 7		    const struct usb_device_id *id,
 8		    struct drm_driver *driver)
 9{
10	struct drm_device *dev;
11	int ret;
12
13	DRM_DEBUG("\n");
14
15	dev = drm_dev_alloc(driver, &interface->dev);
16	if (!dev)
17		return -ENOMEM;
18
19	dev->usbdev = interface_to_usbdev(interface);
20	usb_set_intfdata(interface, dev);
21
22	ret = drm_dev_register(dev, 0);
23	if (ret)
24		goto err_free;
25
26	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
27		 driver->name, driver->major, driver->minor, driver->patchlevel,
28		 driver->date, dev->primary->index);
29
30	return 0;
31
32err_free:
33	drm_dev_unref(dev);
34	return ret;
35
36}
37EXPORT_SYMBOL(drm_get_usb_dev);
38
39static int drm_usb_get_irq(struct drm_device *dev)
40{
41	return 0;
42}
43
44static const char *drm_usb_get_name(struct drm_device *dev)
45{
46	return "USB";
47}
48
49static int drm_usb_set_busid(struct drm_device *dev,
50			       struct drm_master *master)
51{
52	return 0;
53}
54
55static struct drm_bus drm_usb_bus = {
56	.bus_type = DRIVER_BUS_USB,
57	.get_irq = drm_usb_get_irq,
58	.get_name = drm_usb_get_name,
59	.set_busid = drm_usb_set_busid,
60};
61    
62int drm_usb_init(struct drm_driver *driver, struct usb_driver *udriver)
63{
64	int res;
65	DRM_DEBUG("\n");
66
67	driver->kdriver.usb = udriver;
68	driver->bus = &drm_usb_bus;
69
70	res = usb_register(udriver);
71	return res;
72}
73EXPORT_SYMBOL(drm_usb_init);
74
75void drm_usb_exit(struct drm_driver *driver,
76		  struct usb_driver *udriver)
77{
78	usb_deregister(udriver);
79}
80EXPORT_SYMBOL(drm_usb_exit);
81
82MODULE_AUTHOR("David Airlie");
83MODULE_DESCRIPTION("USB DRM support");
84MODULE_LICENSE("GPL and additional rights");