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};
128module_usb_driver(udl_driver);
129MODULE_LICENSE("GPL");