1/*
  2 * Copyright (C) 2012 Red Hat
  3 *
  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
  6 * more details.
  7 */
  8
  9#include <linux/module.h>
 10#include <drm/drm_usb.h>
 11#include <drm/drm_crtc_helper.h>
 12#include "udl_drv.h"
 13
 14static struct drm_driver driver;
 15
 16/*
 17 * There are many DisplayLink-based graphics products, all with unique PIDs.
 18 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
 19 * We also require a match on SubClass (0x00) and Protocol (0x00),
 20 * which is compatible with all known USB 2.0 era graphics chips and firmware,
 21 * but allows DisplayLink to increment those for any future incompatible chips
 22 */
 23static struct usb_device_id id_table[] = {
 24	{.idVendor = 0x17e9, .bInterfaceClass = 0xff,
 25	 .bInterfaceSubClass = 0x00,
 26	 .bInterfaceProtocol = 0x00,
 27	 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
 28			USB_DEVICE_ID_MATCH_INT_CLASS |
 29			USB_DEVICE_ID_MATCH_INT_SUBCLASS |
 30			USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
 31	{},
 32};
 33MODULE_DEVICE_TABLE(usb, id_table);
 34
 35MODULE_LICENSE("GPL");
 36
 37static int udl_usb_probe(struct usb_interface *interface,
 38			 const struct usb_device_id *id)
 39{
 40	return drm_get_usb_dev(interface, id, &driver);
 41}
 42
 43static void udl_usb_disconnect(struct usb_interface *interface)
 44{
 45	struct drm_device *dev = usb_get_intfdata(interface);
 46
 47	drm_kms_helper_poll_disable(dev);
 48	drm_connector_unplug_all(dev);
 49	udl_fbdev_unplug(dev);
 50	udl_drop_usb(dev);
 51	drm_unplug_dev(dev);
 52}
 53
 54static const struct vm_operations_struct udl_gem_vm_ops = {
 55	.fault = udl_gem_fault,
 56	.open = drm_gem_vm_open,
 57	.close = drm_gem_vm_close,
 58};
 59
 60static const struct file_operations udl_driver_fops = {
 61	.owner = THIS_MODULE,
 62	.open = drm_open,
 63	.mmap = udl_drm_gem_mmap,
 64	.poll = drm_poll,
 65	.read = drm_read,
 66	.unlocked_ioctl	= drm_ioctl,
 67	.release = drm_release,
 68#ifdef CONFIG_COMPAT
 69	.compat_ioctl = drm_compat_ioctl,
 70#endif
 71	.llseek = noop_llseek,
 72};
 73
 74static struct drm_driver driver = {
 75	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 76	.load = udl_driver_load,
 77	.unload = udl_driver_unload,
 78
 79	/* gem hooks */
 80	.gem_free_object = udl_gem_free_object,
 81	.gem_vm_ops = &udl_gem_vm_ops,
 82
 83	.dumb_create = udl_dumb_create,
 84	.dumb_map_offset = udl_gem_mmap,
 85	.dumb_destroy = drm_gem_dumb_destroy,
 86	.fops = &udl_driver_fops,
 87
 88	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 89	.gem_prime_import = udl_gem_prime_import,
 90
 91	.name = DRIVER_NAME,
 92	.desc = DRIVER_DESC,
 93	.date = DRIVER_DATE,
 94	.major = DRIVER_MAJOR,
 95	.minor = DRIVER_MINOR,
 96	.patchlevel = DRIVER_PATCHLEVEL,
 97};
 98
 99static struct usb_driver udl_driver = {
100	.name = "udl",
101	.probe = udl_usb_probe,
102	.disconnect = udl_usb_disconnect,
103	.id_table = id_table,
104};
105
106static int __init udl_init(void)
107{
108	return drm_usb_init(&driver, &udl_driver);
109}
110
111static void __exit udl_exit(void)
112{
113	drm_usb_exit(&driver, &udl_driver);
114}
115
116module_init(udl_init);
117module_exit(udl_exit);