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/drmP.h>
11#include <drm/drm_crtc_helper.h>
12#include "udl_drv.h"
13
14static int udl_driver_set_busid(struct drm_device *d, struct drm_master *m)
15{
16	return 0;
17}
18
19static const struct vm_operations_struct udl_gem_vm_ops = {
20	.fault = udl_gem_fault,
21	.open = drm_gem_vm_open,
22	.close = drm_gem_vm_close,
23};
24
25static const struct file_operations udl_driver_fops = {
26	.owner = THIS_MODULE,
27	.open = drm_open,
28	.mmap = udl_drm_gem_mmap,
29	.poll = drm_poll,
30	.read = drm_read,
31	.unlocked_ioctl	= drm_ioctl,
32	.release = drm_release,
33#ifdef CONFIG_COMPAT
34	.compat_ioctl = drm_compat_ioctl,
35#endif
36	.llseek = noop_llseek,
37};
38
39static struct drm_driver driver = {
40	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
41	.load = udl_driver_load,
42	.unload = udl_driver_unload,
43	.set_busid = udl_driver_set_busid,
44
45	/* gem hooks */
46	.gem_free_object = udl_gem_free_object,
47	.gem_vm_ops = &udl_gem_vm_ops,
48
49	.dumb_create = udl_dumb_create,
50	.dumb_map_offset = udl_gem_mmap,
51	.dumb_destroy = drm_gem_dumb_destroy,
52	.fops = &udl_driver_fops,
53
54	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
55	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
56	.gem_prime_export = udl_gem_prime_export,
57	.gem_prime_import = udl_gem_prime_import,
58
59	.name = DRIVER_NAME,
60	.desc = DRIVER_DESC,
61	.date = DRIVER_DATE,
62	.major = DRIVER_MAJOR,
63	.minor = DRIVER_MINOR,
64	.patchlevel = DRIVER_PATCHLEVEL,
65};
66
67static int udl_usb_probe(struct usb_interface *interface,
68			 const struct usb_device_id *id)
69{
70	struct usb_device *udev = interface_to_usbdev(interface);
71	struct drm_device *dev;
72	int r;
73
74	dev = drm_dev_alloc(&driver, &interface->dev);
75	if (!dev)
76		return -ENOMEM;
77
78	r = drm_dev_register(dev, (unsigned long)udev);
79	if (r)
80		goto err_free;
81
82	usb_set_intfdata(interface, dev);
83	DRM_INFO("Initialized udl on minor %d\n", dev->primary->index);
84
85	return 0;
86
87err_free:
88	drm_dev_unref(dev);
89	return r;
90}
91
92static void udl_usb_disconnect(struct usb_interface *interface)
93{
94	struct drm_device *dev = usb_get_intfdata(interface);
95
96	drm_kms_helper_poll_disable(dev);
97	drm_connector_unplug_all(dev);
98	udl_fbdev_unplug(dev);
99	udl_drop_usb(dev);
100	drm_unplug_dev(dev);
101}
102
103/*
104 * There are many DisplayLink-based graphics products, all with unique PIDs.
105 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
106 * We also require a match on SubClass (0x00) and Protocol (0x00),
107 * which is compatible with all known USB 2.0 era graphics chips and firmware,
108 * but allows DisplayLink to increment those for any future incompatible chips
109 */
110static struct usb_device_id id_table[] = {
111	{.idVendor = 0x17e9, .bInterfaceClass = 0xff,
112	 .bInterfaceSubClass = 0x00,
113	 .bInterfaceProtocol = 0x00,
114	 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
115			USB_DEVICE_ID_MATCH_INT_CLASS |
116			USB_DEVICE_ID_MATCH_INT_SUBCLASS |
117			USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
118	{},
119};
120MODULE_DEVICE_TABLE(usb, id_table);
121
122static struct usb_driver udl_driver = {
123	.name = "udl",
124	.probe = udl_usb_probe,
125	.disconnect = udl_usb_disconnect,
126	.id_table = id_table,
127};
128
129static int __init udl_init(void)
130{
131	return usb_register(&udl_driver);
132}
133
134static void __exit udl_exit(void)
135{
136	usb_deregister(&udl_driver);
137}
138
139module_init(udl_init);
140module_exit(udl_exit);
141MODULE_LICENSE("GPL");
142