1#include "drmP.h"
2#include <linux/usb.h>
3#include <linux/module.h>
4
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
118MODULE_AUTHOR("David Airlie");
119MODULE_DESCRIPTION("USB DRM support");
120MODULE_LICENSE("GPL and additional rights");
121