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/drmP.h>
  11#include <drm/drm_crtc_helper.h>
  12#include "udl_drv.h"
  13
  14static int udl_usb_suspend(struct usb_interface *interface,
  15                           pm_message_t message)
  16{
  17        struct drm_device *dev = usb_get_intfdata(interface);
  18
  19        drm_kms_helper_poll_disable(dev);
  20        return 0;
  21}
  22
  23static int udl_usb_resume(struct usb_interface *interface)
  24{
  25        struct drm_device *dev = usb_get_intfdata(interface);
  26
  27        drm_kms_helper_poll_enable(dev);
  28        udl_modeset_restore(dev);
  29        return 0;
  30}
  31
  32static const struct vm_operations_struct udl_gem_vm_ops = {
  33        .fault = udl_gem_fault,
  34        .open = drm_gem_vm_open,
  35        .close = drm_gem_vm_close,
  36};
  37
  38static const struct file_operations udl_driver_fops = {
  39        .owner = THIS_MODULE,
  40        .open = drm_open,
  41        .mmap = udl_drm_gem_mmap,
  42        .poll = drm_poll,
  43        .read = drm_read,
  44        .unlocked_ioctl = drm_ioctl,
  45        .release = drm_release,
  46        .compat_ioctl = drm_compat_ioctl,
  47        .llseek = noop_llseek,
  48};
  49
  50static struct drm_driver driver = {
  51        .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
  52        .load = udl_driver_load,
  53        .unload = udl_driver_unload,
  54
  55        /* gem hooks */
  56        .gem_free_object = udl_gem_free_object,
  57        .gem_vm_ops = &udl_gem_vm_ops,
  58
  59        .dumb_create = udl_dumb_create,
  60        .dumb_map_offset = udl_gem_mmap,
  61        .fops = &udl_driver_fops,
  62
  63        .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
  64        .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  65        .gem_prime_export = udl_gem_prime_export,
  66        .gem_prime_import = udl_gem_prime_import,
  67
  68        .name = DRIVER_NAME,
  69        .desc = DRIVER_DESC,
  70        .date = DRIVER_DATE,
  71        .major = DRIVER_MAJOR,
  72        .minor = DRIVER_MINOR,
  73        .patchlevel = DRIVER_PATCHLEVEL,
  74};
  75
  76static int udl_usb_probe(struct usb_interface *interface,
  77                         const struct usb_device_id *id)
  78{
  79        struct usb_device *udev = interface_to_usbdev(interface);
  80        struct drm_device *dev;
  81        int r;
  82
  83        dev = drm_dev_alloc(&driver, &interface->dev);
  84        if (IS_ERR(dev))
  85                return PTR_ERR(dev);
  86
  87        r = drm_dev_register(dev, (unsigned long)udev);
  88        if (r)
  89                goto err_free;
  90
  91        usb_set_intfdata(interface, dev);
  92        DRM_INFO("Initialized udl on minor %d\n", dev->primary->index);
  93
  94        return 0;
  95
  96err_free:
  97        drm_dev_unref(dev);
  98        return r;
  99}
 100
 101static void udl_usb_disconnect(struct usb_interface *interface)
 102{
 103        struct drm_device *dev = usb_get_intfdata(interface);
 104
 105        drm_kms_helper_poll_disable(dev);
 106        udl_fbdev_unplug(dev);
 107        udl_drop_usb(dev);
 108        drm_dev_unplug(dev);
 109}
 110
 111/*
 112 * There are many DisplayLink-based graphics products, all with unique PIDs.
 113 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
 114 * We also require a match on SubClass (0x00) and Protocol (0x00),
 115 * which is compatible with all known USB 2.0 era graphics chips and firmware,
 116 * but allows DisplayLink to increment those for any future incompatible chips
 117 */
 118static const struct usb_device_id id_table[] = {
 119        {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
 120         .bInterfaceSubClass = 0x00,
 121         .bInterfaceProtocol = 0x00,
 122         .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
 123                        USB_DEVICE_ID_MATCH_INT_CLASS |
 124                        USB_DEVICE_ID_MATCH_INT_SUBCLASS |
 125                        USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
 126        {},
 127};
 128MODULE_DEVICE_TABLE(usb, id_table);
 129
 130static struct usb_driver udl_driver = {
 131        .name = "udl",
 132        .probe = udl_usb_probe,
 133        .disconnect = udl_usb_disconnect,
 134        .suspend = udl_usb_suspend,
 135        .resume = udl_usb_resume,
 136        .id_table = id_table,
 137};
 138module_usb_driver(udl_driver);
 139MODULE_LICENSE("GPL");
 140