2 * Copyright (C) 2012 Red Hat
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License v2. See the file COPYING in the main directory of this archive for
9 #include <linux/module.h>
11 #include <drm/drm_crtc_helper.h>
14 static int udl_usb_suspend(struct usb_interface *interface,
20 static int udl_usb_resume(struct usb_interface *interface)
22 struct drm_device *dev = usb_get_intfdata(interface);
24 udl_modeset_restore(dev);
28 static const struct vm_operations_struct udl_gem_vm_ops = {
29 .fault = udl_gem_fault,
30 .open = drm_gem_vm_open,
31 .close = drm_gem_vm_close,
34 static const struct file_operations udl_driver_fops = {
37 .mmap = udl_drm_gem_mmap,
40 .unlocked_ioctl = drm_ioctl,
41 .release = drm_release,
42 .compat_ioctl = drm_compat_ioctl,
43 .llseek = noop_llseek,
46 static void udl_driver_release(struct drm_device *dev)
49 udl_modeset_cleanup(dev);
54 static struct drm_driver driver = {
55 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
56 .release = udl_driver_release,
59 .gem_free_object = udl_gem_free_object,
60 .gem_vm_ops = &udl_gem_vm_ops,
62 .dumb_create = udl_dumb_create,
63 .dumb_map_offset = udl_gem_mmap,
64 .fops = &udl_driver_fops,
66 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
67 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
68 .gem_prime_export = udl_gem_prime_export,
69 .gem_prime_import = udl_gem_prime_import,
74 .major = DRIVER_MAJOR,
75 .minor = DRIVER_MINOR,
76 .patchlevel = DRIVER_PATCHLEVEL,
79 static struct udl_device *udl_driver_create(struct usb_interface *interface)
81 struct usb_device *udev = interface_to_usbdev(interface);
82 struct udl_device *udl;
85 udl = kzalloc(sizeof(*udl), GFP_KERNEL);
87 return ERR_PTR(-ENOMEM);
89 r = drm_dev_init(&udl->drm, &driver, &interface->dev);
96 udl->drm.dev_private = udl;
100 drm_dev_fini(&udl->drm);
105 usb_set_intfdata(interface, udl);
109 static int udl_usb_probe(struct usb_interface *interface,
110 const struct usb_device_id *id)
113 struct udl_device *udl;
115 udl = udl_driver_create(interface);
119 r = drm_dev_register(&udl->drm, 0);
123 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
128 drm_dev_unref(&udl->drm);
132 static void udl_usb_disconnect(struct usb_interface *interface)
134 struct drm_device *dev = usb_get_intfdata(interface);
136 drm_kms_helper_poll_disable(dev);
137 udl_fbdev_unplug(dev);
143 * There are many DisplayLink-based graphics products, all with unique PIDs.
144 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
145 * We also require a match on SubClass (0x00) and Protocol (0x00),
146 * which is compatible with all known USB 2.0 era graphics chips and firmware,
147 * but allows DisplayLink to increment those for any future incompatible chips
149 static const struct usb_device_id id_table[] = {
150 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
151 .bInterfaceSubClass = 0x00,
152 .bInterfaceProtocol = 0x00,
153 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
154 USB_DEVICE_ID_MATCH_INT_CLASS |
155 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
156 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
159 MODULE_DEVICE_TABLE(usb, id_table);
161 static struct usb_driver udl_driver = {
163 .probe = udl_usb_probe,
164 .disconnect = udl_usb_disconnect,
165 .suspend = udl_usb_suspend,
166 .resume = udl_usb_resume,
167 .id_table = id_table,
169 module_usb_driver(udl_driver);
170 MODULE_LICENSE("GPL");