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