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Linux/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);
118 

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