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