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