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
udl_driver_set_busid(struct drm_device * d,struct drm_master * m)14 static int udl_driver_set_busid(struct drm_device *d, struct drm_master *m)
15 {
16 return 0;
17 }
18
19 static 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
25 static 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
39 static 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_fd_to_handle = drm_gem_prime_fd_to_handle,
55 .gem_prime_import = udl_gem_prime_import,
56
57 .name = DRIVER_NAME,
58 .desc = DRIVER_DESC,
59 .date = DRIVER_DATE,
60 .major = DRIVER_MAJOR,
61 .minor = DRIVER_MINOR,
62 .patchlevel = DRIVER_PATCHLEVEL,
63 };
64
udl_usb_probe(struct usb_interface * interface,const struct usb_device_id * id)65 static int udl_usb_probe(struct usb_interface *interface,
66 const struct usb_device_id *id)
67 {
68 struct usb_device *udev = interface_to_usbdev(interface);
69 struct drm_device *dev;
70 int r;
71
72 dev = drm_dev_alloc(&driver, &interface->dev);
73 if (!dev)
74 return -ENOMEM;
75
76 r = drm_dev_register(dev, (unsigned long)udev);
77 if (r)
78 goto err_free;
79
80 usb_set_intfdata(interface, dev);
81 DRM_INFO("Initialized udl on minor %d\n", dev->primary->index);
82
83 return 0;
84
85 err_free:
86 drm_dev_unref(dev);
87 return r;
88 }
89
udl_usb_disconnect(struct usb_interface * interface)90 static void udl_usb_disconnect(struct usb_interface *interface)
91 {
92 struct drm_device *dev = usb_get_intfdata(interface);
93
94 drm_kms_helper_poll_disable(dev);
95 drm_connector_unplug_all(dev);
96 udl_fbdev_unplug(dev);
97 udl_drop_usb(dev);
98 drm_unplug_dev(dev);
99 }
100
101 /*
102 * There are many DisplayLink-based graphics products, all with unique PIDs.
103 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
104 * We also require a match on SubClass (0x00) and Protocol (0x00),
105 * which is compatible with all known USB 2.0 era graphics chips and firmware,
106 * but allows DisplayLink to increment those for any future incompatible chips
107 */
108 static struct usb_device_id id_table[] = {
109 {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
110 .bInterfaceSubClass = 0x00,
111 .bInterfaceProtocol = 0x00,
112 .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
113 USB_DEVICE_ID_MATCH_INT_CLASS |
114 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
115 USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
116 {},
117 };
118 MODULE_DEVICE_TABLE(usb, id_table);
119
120 static struct usb_driver udl_driver = {
121 .name = "udl",
122 .probe = udl_usb_probe,
123 .disconnect = udl_usb_disconnect,
124 .id_table = id_table,
125 };
126
udl_init(void)127 static int __init udl_init(void)
128 {
129 return usb_register(&udl_driver);
130 }
131
udl_exit(void)132 static void __exit udl_exit(void)
133 {
134 usb_deregister(&udl_driver);
135 }
136
137 module_init(udl_init);
138 module_exit(udl_exit);
139 MODULE_LICENSE("GPL");
140