drivers/gpu/drm/udl/udl_drv.c

   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
  14 static 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  */
  23 static 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 };
  33 MODULE_DEVICE_TABLE(usb, id_table);
  34
  35 MODULE_LICENSE("GPL");
  36
  37 static 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
  43 static 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
  54 static 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
  60 static 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 #ifdef CONFIG_COMPAT
  69         .compat_ioctl = drm_compat_ioctl,
  70 #endif
  71         .llseek = noop_llseek,
  72 };
  73
  74 static struct drm_driver driver = {
  75         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
  76         .load = udl_driver_load,
  77         .unload = udl_driver_unload,
  78
  79         /* gem hooks */
  80         .gem_free_object = udl_gem_free_object,
  81         .gem_vm_ops = &udl_gem_vm_ops,
  82
  83         .dumb_create = udl_dumb_create,
  84         .dumb_map_offset = udl_gem_mmap,
  85         .dumb_destroy = drm_gem_dumb_destroy,
  86         .fops = &udl_driver_fops,
  87
  88         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  89         .gem_prime_import = udl_gem_prime_import,
  90
  91         .name = DRIVER_NAME,
  92         .desc = DRIVER_DESC,
  93         .date = DRIVER_DATE,
  94         .major = DRIVER_MAJOR,
  95         .minor = DRIVER_MINOR,
  96         .patchlevel = DRIVER_PATCHLEVEL,
  97 };
  98
  99 static struct usb_driver udl_driver = {
 100         .name = "udl",
 101         .probe = udl_usb_probe,
 102         .disconnect = udl_usb_disconnect,
 103         .id_table = id_table,
 104 };
 105
 106 static int __init udl_init(void)
 107 {
 108         return drm_usb_init(&driver, &udl_driver);
 109 }
 110
 111 static void __exit udl_exit(void)
 112 {
 113         drm_usb_exit(&driver, &udl_driver);
 114 }
 115
 116 module_init(udl_init);
 117 module_exit(udl_exit);