drivers/gpu/drm/drm_usb.c

   1 #include <drm/drmP.h>
   2 #include <drm/drm_usb.h>
   3 #include <linux/usb.h>
   4 #include <linux/module.h>
   5
   6 int 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
  32 err_free:
  33         drm_dev_unref(dev);
  34         return ret;
  35
  36 }
  37 EXPORT_SYMBOL(drm_get_usb_dev);
  38
  39 static int drm_usb_get_irq(struct drm_device *dev)
  40 {
  41         return 0;
  42 }
  43
  44 static const char *drm_usb_get_name(struct drm_device *dev)
  45 {
  46         return "USB";
  47 }
  48
  49 static int drm_usb_set_busid(struct drm_device *dev,
  50                                struct drm_master *master)
  51 {
  52         return 0;
  53 }
  54
  55 static 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
  62 int 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 }
  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");