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         struct drm_device *dev = usb_get_intfdata(interface);
  18
  19         drm_kms_helper_poll_disable(dev);
  20         return 0;
  21 }
  22
  23 static 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
  32 static 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
  38 static 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
  50 static 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
  76 static 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
  96 err_free:
  97         drm_dev_unref(dev);
  98         return r;
  99 }
 100
 101 static 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  */
 118 static 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 };
 128 MODULE_DEVICE_TABLE(usb, id_table);
 129
 130 static 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 };
 138 module_usb_driver(udl_driver);
 139 MODULE_LICENSE("GPL");