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");