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