udl_drv.c revision e5a867a51d9b009f90d5dca6a320608e4e8a37ec 
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_usb.h"
11#include "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	.fasync = drm_fasync,
69	.llseek = noop_llseek,
70};
71
72static struct drm_driver driver = {
73	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
74	.load = udl_driver_load,
75	.unload = udl_driver_unload,
76
77	/* gem hooks */
78	.gem_init_object = udl_gem_init_object,
79	.gem_free_object = udl_gem_free_object,
80	.gem_vm_ops = &udl_gem_vm_ops,
81
82	.dumb_create = udl_dumb_create,
83	.dumb_map_offset = udl_gem_mmap,
84	.dumb_destroy = udl_dumb_destroy,
85	.fops = &udl_driver_fops,
86
87	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
88	.gem_prime_import = udl_gem_prime_import,
89
90	.name = DRIVER_NAME,
91	.desc = DRIVER_DESC,
92	.date = DRIVER_DATE,
93	.major = DRIVER_MAJOR,
94	.minor = DRIVER_MINOR,
95	.patchlevel = DRIVER_PATCHLEVEL,
96};
97
98static struct usb_driver udl_driver = {
99	.name = "udl",
100	.probe = udl_usb_probe,
101	.disconnect = udl_usb_disconnect,
102	.id_table = id_table,
103};
104
105static int __init udl_init(void)
106{
107	return drm_usb_init(&driver, &udl_driver);
108}
109
110static void __exit udl_exit(void)
111{
112	drm_usb_exit(&driver, &udl_driver);
113}
114
115module_init(udl_init);
116module_exit(udl_exit);
117