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