LXR linux/drivers/gpu/drm/drm

   1#include <drm/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        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
  31err_free:
  32        drm_dev_free(dev);
  33        return ret;
  34
  35}
  36EXPORT_SYMBOL(drm_get_usb_dev);
  37
  38static int drm_usb_get_irq(struct drm_device *dev)
  39{
  40        return 0;
  41}
  42
  43static const char *drm_usb_get_name(struct drm_device *dev)
  44{
  45        return "USB";
  46}
  47
  48static int drm_usb_set_busid(struct drm_device *dev,
  49                               struct drm_master *master)
  50{
  51        return 0;
  52}
  53
  54static 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    
  61int 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}
  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");
  85