LXR linux/drivers/gpu/drm/udl/udl

   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/drm_usb.h>
  11#include <drm/drm_crtc_helper.h>
  12#include "udl_drv.h"
  13
  14static struct drm_driver driver;
  15
  16/*
  17 * There are many DisplayLink-based graphics products, all with unique PIDs.
  18 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
  19 * We also require a match on SubClass (0x00) and Protocol (0x00),
  20 * which is compatible with all known USB 2.0 era graphics chips and firmware,
  21 * but allows DisplayLink to increment those for any future incompatible chips
  22 */
  23static struct usb_device_id id_table[] = {
  24        {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
  25         .bInterfaceSubClass = 0x00,
  26         .bInterfaceProtocol = 0x00,
  27         .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
  28                        USB_DEVICE_ID_MATCH_INT_CLASS |
  29                        USB_DEVICE_ID_MATCH_INT_SUBCLASS |
  30                        USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
  31        {},
  32};
  33MODULE_DEVICE_TABLE(usb, id_table);
  34
  35MODULE_LICENSE("GPL");
  36
  37static int udl_usb_probe(struct usb_interface *interface,
  38                         const struct usb_device_id *id)
  39{
  40        return drm_get_usb_dev(interface, id, &driver);
  41}
  42
  43static void udl_usb_disconnect(struct usb_interface *interface)
  44{
  45        struct drm_device *dev = usb_get_intfdata(interface);
  46
  47        drm_kms_helper_poll_disable(dev);
  48        drm_connector_unplug_all(dev);
  49        udl_fbdev_unplug(dev);
  50        udl_drop_usb(dev);
  51        drm_unplug_dev(dev);
  52}
  53
  54static const struct vm_operations_struct udl_gem_vm_ops = {
  55        .fault = udl_gem_fault,
  56        .open = drm_gem_vm_open,
  57        .close = drm_gem_vm_close,
  58};
  59
  60static const struct file_operations udl_driver_fops = {
  61        .owner = THIS_MODULE,
  62        .open = drm_open,
  63        .mmap = udl_drm_gem_mmap,
  64        .poll = drm_poll,
  65        .read = drm_read,
  66        .unlocked_ioctl = drm_ioctl,
  67        .release = drm_release,
  68        .fasync = drm_fasync,
  69#ifdef CONFIG_COMPAT
  70        .compat_ioctl = drm_compat_ioctl,
  71#endif
  72        .llseek = noop_llseek,
  73};
  74
  75static struct drm_driver driver = {
  76        .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
  77        .load = udl_driver_load,
  78        .unload = udl_driver_unload,
  79
  80        /* gem hooks */
  81        .gem_init_object = udl_gem_init_object,
  82        .gem_free_object = udl_gem_free_object,
  83        .gem_vm_ops = &udl_gem_vm_ops,
  84
  85        .dumb_create = udl_dumb_create,
  86        .dumb_map_offset = udl_gem_mmap,
  87        .dumb_destroy = udl_dumb_destroy,
  88        .fops = &udl_driver_fops,
  89
  90        .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  91        .gem_prime_import = udl_gem_prime_import,
  92
  93        .name = DRIVER_NAME,
  94        .desc = DRIVER_DESC,
  95        .date = DRIVER_DATE,
  96        .major = DRIVER_MAJOR,
  97        .minor = DRIVER_MINOR,
  98        .patchlevel = DRIVER_PATCHLEVEL,
  99};
 100
 101static struct usb_driver udl_driver = {
 102        .name = "udl",
 103        .probe = udl_usb_probe,
 104        .disconnect = udl_usb_disconnect,
 105        .id_table = id_table,
 106};
 107
 108static int __init udl_init(void)
 109{
 110        return drm_usb_init(&driver, &udl_driver);
 111}
 112
 113static void __exit udl_exit(void)
 114{
 115        drm_usb_exit(&driver, &udl_driver);
 116}
 117
 118module_init(udl_init);
 119module_exit(udl_exit);
 120