drivers/gpu/drm/drm_usb.c

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