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 <drm/drm_probe_helper.h>
  13 #include "udl_drv.h"
  14
  15 static int udl_usb_suspend(struct usb_interface *interface,
  16                            pm_message_t message)
  17 {
  18         struct drm_device *dev = usb_get_intfdata(interface);
  19
  20         drm_kms_helper_poll_disable(dev);
  21         return 0;
  22 }
  23
  24 static int udl_usb_resume(struct usb_interface *interface)
  25 {
  26         struct drm_device *dev = usb_get_intfdata(interface);
  27
  28         drm_kms_helper_poll_enable(dev);
  29         udl_modeset_restore(dev);
  30         return 0;
  31 }
  32
  33 static const struct vm_operations_struct udl_gem_vm_ops = {
  34         .fault = udl_gem_fault,
  35         .open = drm_gem_vm_open,
  36         .close = drm_gem_vm_close,
  37 };
  38
  39 static const struct file_operations udl_driver_fops = {
  40         .owner = THIS_MODULE,
  41         .open = drm_open,
  42         .mmap = udl_drm_gem_mmap,
  43         .poll = drm_poll,
  44         .read = drm_read,
  45         .unlocked_ioctl = drm_ioctl,
  46         .release = drm_release,
  47         .compat_ioctl = drm_compat_ioctl,
  48         .llseek = noop_llseek,
  49 };
  50
  51 static void udl_driver_release(struct drm_device *dev)
  52 {
  53         udl_fini(dev);
  54         udl_modeset_cleanup(dev);
  55         drm_dev_fini(dev);
  56         kfree(dev);
  57 }
  58
  59 static struct drm_driver driver = {
  60         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
  61         .release = udl_driver_release,
  62
  63         /* gem hooks */
  64         .gem_free_object_unlocked = udl_gem_free_object,
  65         .gem_vm_ops = &udl_gem_vm_ops,
  66
  67         .dumb_create = udl_dumb_create,
  68         .dumb_map_offset = udl_gem_mmap,
  69         .fops = &udl_driver_fops,
  70
  71         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
  72         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  73         .gem_prime_export = udl_gem_prime_export,
  74         .gem_prime_import = udl_gem_prime_import,
  75
  76         .name = DRIVER_NAME,
  77         .desc = DRIVER_DESC,
  78         .date = DRIVER_DATE,
  79         .major = DRIVER_MAJOR,
  80         .minor = DRIVER_MINOR,
  81         .patchlevel = DRIVER_PATCHLEVEL,
  82 };
  83
  84 static struct udl_device *udl_driver_create(struct usb_interface *interface)
  85 {
  86         struct usb_device *udev = interface_to_usbdev(interface);
  87         struct udl_device *udl;
  88         int r;
  89
  90         udl = kzalloc(sizeof(*udl), GFP_KERNEL);
  91         if (!udl)
  92                 return ERR_PTR(-ENOMEM);
  93
  94         r = drm_dev_init(&udl->drm, &driver, &interface->dev);
  95         if (r) {
  96                 kfree(udl);
  97                 return ERR_PTR(r);
  98         }
  99
 100         udl->udev = udev;
 101         udl->drm.dev_private = udl;
 102
 103         r = udl_init(udl);
 104         if (r) {
 105                 drm_dev_fini(&udl->drm);
 106                 kfree(udl);
 107                 return ERR_PTR(r);
 108         }
 109
 110         usb_set_intfdata(interface, udl);
 111         return udl;
 112 }
 113
 114 static int udl_usb_probe(struct usb_interface *interface,
 115                          const struct usb_device_id *id)
 116 {
 117         int r;
 118         struct udl_device *udl;
 119
 120         udl = udl_driver_create(interface);
 121         if (IS_ERR(udl))
 122                 return PTR_ERR(udl);
 123
 124         r = drm_dev_register(&udl->drm, 0);
 125         if (r)
 126                 goto err_free;
 127
 128         DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
 129
 130         return 0;
 131
 132 err_free:
 133         drm_dev_put(&udl->drm);
 134         return r;
 135 }
 136
 137 static void udl_usb_disconnect(struct usb_interface *interface)
 138 {
 139         struct drm_device *dev = usb_get_intfdata(interface);
 140
 141         drm_kms_helper_poll_disable(dev);
 142         udl_fbdev_unplug(dev);
 143         udl_drop_usb(dev);
 144         drm_dev_unplug(dev);
 145         drm_dev_put(dev);
 146 }
 147
 148 /*
 149  * There are many DisplayLink-based graphics products, all with unique PIDs.
 150  * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
 151  * We also require a match on SubClass (0x00) and Protocol (0x00),
 152  * which is compatible with all known USB 2.0 era graphics chips and firmware,
 153  * but allows DisplayLink to increment those for any future incompatible chips
 154  */
 155 static const struct usb_device_id id_table[] = {
 156         {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
 157          .bInterfaceSubClass = 0x00,
 158          .bInterfaceProtocol = 0x00,
 159          .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
 160                         USB_DEVICE_ID_MATCH_INT_CLASS |
 161                         USB_DEVICE_ID_MATCH_INT_SUBCLASS |
 162                         USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
 163         {},
 164 };
 165 MODULE_DEVICE_TABLE(usb, id_table);
 166
 167 static struct usb_driver udl_driver = {
 168         .name = "udl",
 169         .probe = udl_usb_probe,
 170         .disconnect = udl_usb_disconnect,
 171         .suspend = udl_usb_suspend,
 172         .resume = udl_usb_resume,
 173         .id_table = id_table,
 174 };
 175 module_usb_driver(udl_driver);
 176 MODULE_LICENSE("GPL");