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_file.h>
 11#include <drm/drm_ioctl.h>
 12#include <drm/drm_probe_helper.h>
 13#include <drm/drm_print.h>
 14
 15#include "udl_drv.h"
 16
 17static int udl_usb_suspend(struct usb_interface *interface,
 18			   pm_message_t message)
 19{
 20	struct drm_device *dev = usb_get_intfdata(interface);
 21
 22	drm_kms_helper_poll_disable(dev);
 23	return 0;
 24}
 25
 26static int udl_usb_resume(struct usb_interface *interface)
 27{
 28	struct drm_device *dev = usb_get_intfdata(interface);
 29
 30	drm_kms_helper_poll_enable(dev);
 31	udl_modeset_restore(dev);
 32	return 0;
 33}
 34
 35static const struct vm_operations_struct udl_gem_vm_ops = {
 36	.fault = udl_gem_fault,
 37	.open = drm_gem_vm_open,
 38	.close = drm_gem_vm_close,
 39};
 40
 41static const struct file_operations udl_driver_fops = {
 42	.owner = THIS_MODULE,
 43	.open = drm_open,
 44	.mmap = udl_drm_gem_mmap,
 45	.poll = drm_poll,
 46	.read = drm_read,
 47	.unlocked_ioctl	= drm_ioctl,
 48	.release = drm_release,
 49	.compat_ioctl = drm_compat_ioctl,
 50	.llseek = noop_llseek,
 51};
 52
 53static void udl_driver_release(struct drm_device *dev)
 54{
 55	udl_fini(dev);
 56	udl_modeset_cleanup(dev);
 57	drm_dev_fini(dev);
 58	kfree(dev);
 59}
 60
 61static struct drm_driver driver = {
 62	.driver_features = DRIVER_MODESET | DRIVER_GEM,
 63	.release = udl_driver_release,
 64
 65	/* gem hooks */
 66	.gem_free_object_unlocked = udl_gem_free_object,
 67	.gem_vm_ops = &udl_gem_vm_ops,
 68
 69	.dumb_create = udl_dumb_create,
 70	.dumb_map_offset = udl_gem_mmap,
 71	.fops = &udl_driver_fops,
 72
 73	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 74	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 75	.gem_prime_export = udl_gem_prime_export,
 76	.gem_prime_import = udl_gem_prime_import,
 77
 78	.name = DRIVER_NAME,
 79	.desc = DRIVER_DESC,
 80	.date = DRIVER_DATE,
 81	.major = DRIVER_MAJOR,
 82	.minor = DRIVER_MINOR,
 83	.patchlevel = DRIVER_PATCHLEVEL,
 84};
 85
 86static struct udl_device *udl_driver_create(struct usb_interface *interface)
 87{
 88	struct usb_device *udev = interface_to_usbdev(interface);
 89	struct udl_device *udl;
 90	int r;
 91
 92	udl = kzalloc(sizeof(*udl), GFP_KERNEL);
 93	if (!udl)
 94		return ERR_PTR(-ENOMEM);
 95
 96	r = drm_dev_init(&udl->drm, &driver, &interface->dev);
 97	if (r) {
 98		kfree(udl);
 99		return ERR_PTR(r);
100	}
101
102	udl->udev = udev;
103	udl->drm.dev_private = udl;
104
105	r = udl_init(udl);
106	if (r) {
107		drm_dev_fini(&udl->drm);
108		kfree(udl);
109		return ERR_PTR(r);
110	}
111
112	usb_set_intfdata(interface, udl);
113	return udl;
114}
115
116static int udl_usb_probe(struct usb_interface *interface,
117			 const struct usb_device_id *id)
118{
119	int r;
120	struct udl_device *udl;
121
122	udl = udl_driver_create(interface);
123	if (IS_ERR(udl))
124		return PTR_ERR(udl);
125
126	r = drm_dev_register(&udl->drm, 0);
127	if (r)
128		goto err_free;
129
130	DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
131
132	return 0;
133
134err_free:
135	drm_dev_put(&udl->drm);
136	return r;
137}
138
139static void udl_usb_disconnect(struct usb_interface *interface)
140{
141	struct drm_device *dev = usb_get_intfdata(interface);
142
143	drm_kms_helper_poll_disable(dev);
144	udl_fbdev_unplug(dev);
145	udl_drop_usb(dev);
146	drm_dev_unplug(dev);
147	drm_dev_put(dev);
148}
149
150/*
151 * There are many DisplayLink-based graphics products, all with unique PIDs.
152 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
153 * We also require a match on SubClass (0x00) and Protocol (0x00),
154 * which is compatible with all known USB 2.0 era graphics chips and firmware,
155 * but allows DisplayLink to increment those for any future incompatible chips
156 */
157static const struct usb_device_id id_table[] = {
158	{.idVendor = 0x17e9, .bInterfaceClass = 0xff,
159	 .bInterfaceSubClass = 0x00,
160	 .bInterfaceProtocol = 0x00,
161	 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
162			USB_DEVICE_ID_MATCH_INT_CLASS |
163			USB_DEVICE_ID_MATCH_INT_SUBCLASS |
164			USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
165	{},
166};
167MODULE_DEVICE_TABLE(usb, id_table);
168
169static struct usb_driver udl_driver = {
170	.name = "udl",
171	.probe = udl_usb_probe,
172	.disconnect = udl_usb_disconnect,
173	.suspend = udl_usb_suspend,
174	.resume = udl_usb_resume,
175	.id_table = id_table,
176};
177module_usb_driver(udl_driver);
178MODULE_LICENSE("GPL");