1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (C) 2012 Red Hat
  4 */
  5
  6#include <linux/module.h>
  7
  8#include <drm/drm_crtc_helper.h>
  9#include <drm/drm_drv.h>
 10#include <drm/drm_fb_helper.h>
 11#include <drm/drm_file.h>
 12#include <drm/drm_gem_shmem_helper.h>
 13#include <drm/drm_managed.h>
 14#include <drm/drm_ioctl.h>
 15#include <drm/drm_probe_helper.h>
 16#include <drm/drm_print.h>
 17
 18#include "udl_drv.h"
 19
 20static int udl_usb_suspend(struct usb_interface *interface,
 21			   pm_message_t message)
 22{
 23	struct drm_device *dev = usb_get_intfdata(interface);
 24
 25	return drm_mode_config_helper_suspend(dev);
 26}
 27
 28static int udl_usb_resume(struct usb_interface *interface)
 29{
 30	struct drm_device *dev = usb_get_intfdata(interface);
 31
 32	return drm_mode_config_helper_resume(dev);
 33}
 34
 35DEFINE_DRM_GEM_FOPS(udl_driver_fops);
 36
 37static struct drm_driver driver = {
 38	.driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
 39
 40	/* GEM hooks */
 41	.gem_create_object = drm_gem_shmem_create_object_cached,
 42
 43	.fops = &udl_driver_fops,
 44	DRM_GEM_SHMEM_DRIVER_OPS,
 45
 46	.name = DRIVER_NAME,
 47	.desc = DRIVER_DESC,
 48	.date = DRIVER_DATE,
 49	.major = DRIVER_MAJOR,
 50	.minor = DRIVER_MINOR,
 51	.patchlevel = DRIVER_PATCHLEVEL,
 52};
 53
 54static struct udl_device *udl_driver_create(struct usb_interface *interface)
 55{
 56	struct usb_device *udev = interface_to_usbdev(interface);
 57	struct udl_device *udl;
 58	int r;
 59
 60	udl = devm_drm_dev_alloc(&interface->dev, &driver,
 61				 struct udl_device, drm);
 62	if (IS_ERR(udl))
 63		return udl;
 64
 65	udl->udev = udev;
 66
 67	r = udl_init(udl);
 68	if (r)
 69		return ERR_PTR(r);
 70
 71	usb_set_intfdata(interface, udl);
 72
 73	return udl;
 74}
 75
 76static int udl_usb_probe(struct usb_interface *interface,
 77			 const struct usb_device_id *id)
 78{
 79	int r;
 80	struct udl_device *udl;
 81
 82	udl = udl_driver_create(interface);
 83	if (IS_ERR(udl))
 84		return PTR_ERR(udl);
 85
 86	r = drm_dev_register(&udl->drm, 0);
 87	if (r)
 88		return r;
 89
 90	DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
 91
 92	drm_fbdev_generic_setup(&udl->drm, 0);
 93
 94	return 0;
 95}
 96
 97static void udl_usb_disconnect(struct usb_interface *interface)
 98{
 99	struct drm_device *dev = usb_get_intfdata(interface);
100
101	drm_kms_helper_poll_fini(dev);
102	udl_drop_usb(dev);
103	drm_dev_unplug(dev);
104}
105
106/*
107 * There are many DisplayLink-based graphics products, all with unique PIDs.
108 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
109 * We also require a match on SubClass (0x00) and Protocol (0x00),
110 * which is compatible with all known USB 2.0 era graphics chips and firmware,
111 * but allows DisplayLink to increment those for any future incompatible chips
112 */
113static const struct usb_device_id id_table[] = {
114	{.idVendor = 0x17e9, .bInterfaceClass = 0xff,
115	 .bInterfaceSubClass = 0x00,
116	 .bInterfaceProtocol = 0x00,
117	 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
118			USB_DEVICE_ID_MATCH_INT_CLASS |
119			USB_DEVICE_ID_MATCH_INT_SUBCLASS |
120			USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
121	{},
122};
123MODULE_DEVICE_TABLE(usb, id_table);
124
125static struct usb_driver udl_driver = {
126	.name = "udl",
127	.probe = udl_usb_probe,
128	.disconnect = udl_usb_disconnect,
129	.suspend = udl_usb_suspend,
130	.resume = udl_usb_resume,
131	.id_table = id_table,
132};
133module_usb_driver(udl_driver);
134MODULE_LICENSE("GPL");