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 void udl_driver_release(struct drm_device *dev)
  47 {
  48         udl_fini(dev);
  49         udl_modeset_cleanup(dev);
  50         drm_dev_fini(dev);
  51         kfree(dev);
  52 }
  53
  54 static struct drm_driver driver = {
  55         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
  56         .release = udl_driver_release,
  57
  58         /* gem hooks */
  59         .gem_free_object = udl_gem_free_object,
  60         .gem_vm_ops = &udl_gem_vm_ops,
  61
  62         .dumb_create = udl_dumb_create,
  63         .dumb_map_offset = udl_gem_mmap,
  64         .fops = &udl_driver_fops,
  65
  66         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
  67         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  68         .gem_prime_export = udl_gem_prime_export,
  69         .gem_prime_import = udl_gem_prime_import,
  70
  71         .name = DRIVER_NAME,
  72         .desc = DRIVER_DESC,
  73         .date = DRIVER_DATE,
  74         .major = DRIVER_MAJOR,
  75         .minor = DRIVER_MINOR,
  76         .patchlevel = DRIVER_PATCHLEVEL,
  77 };
  78
  79 static struct udl_device *udl_driver_create(struct usb_interface *interface)
  80 {
  81         struct usb_device *udev = interface_to_usbdev(interface);
  82         struct udl_device *udl;
  83         int r;
  84
  85         udl = kzalloc(sizeof(*udl), GFP_KERNEL);
  86         if (!udl)
  87                 return ERR_PTR(-ENOMEM);
  88
  89         r = drm_dev_init(&udl->drm, &driver, &interface->dev);
  90         if (r) {
  91                 kfree(udl);
  92                 return ERR_PTR(r);
  93         }
  94
  95         udl->udev = udev;
  96         udl->drm.dev_private = udl;
  97
  98         r = udl_init(udl);
  99         if (r) {
 100                 drm_dev_fini(&udl->drm);
 101                 kfree(udl);
 102                 return ERR_PTR(r);
 103         }
 104
 105         usb_set_intfdata(interface, udl);
 106         return udl;
 107 }
 108
 109 static int udl_usb_probe(struct usb_interface *interface,
 110                          const struct usb_device_id *id)
 111 {
 112         int r;
 113         struct udl_device *udl;
 114
 115         udl = udl_driver_create(interface);
 116         if (IS_ERR(udl))
 117                 return PTR_ERR(udl);
 118
 119         r = drm_dev_register(&udl->drm, 0);
 120         if (r)
 121                 goto err_free;
 122
 123         DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
 124
 125         return 0;
 126
 127 err_free:
 128         drm_dev_unref(&udl->drm);
 129         return r;
 130 }
 131
 132 static void udl_usb_disconnect(struct usb_interface *interface)
 133 {
 134         struct drm_device *dev = usb_get_intfdata(interface);
 135
 136         drm_kms_helper_poll_disable(dev);
 137         udl_fbdev_unplug(dev);
 138         udl_drop_usb(dev);
 139         drm_dev_unplug(dev);
 140 }
 141
 142 /*
 143  * There are many DisplayLink-based graphics products, all with unique PIDs.
 144  * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
 145  * We also require a match on SubClass (0x00) and Protocol (0x00),
 146  * which is compatible with all known USB 2.0 era graphics chips and firmware,
 147  * but allows DisplayLink to increment those for any future incompatible chips
 148  */
 149 static const struct usb_device_id id_table[] = {
 150         {.idVendor = 0x17e9, .bInterfaceClass = 0xff,
 151          .bInterfaceSubClass = 0x00,
 152          .bInterfaceProtocol = 0x00,
 153          .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
 154                         USB_DEVICE_ID_MATCH_INT_CLASS |
 155                         USB_DEVICE_ID_MATCH_INT_SUBCLASS |
 156                         USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
 157         {},
 158 };
 159 MODULE_DEVICE_TABLE(usb, id_table);
 160
 161 static struct usb_driver udl_driver = {
 162         .name = "udl",
 163         .probe = udl_usb_probe,
 164         .disconnect = udl_usb_disconnect,
 165         .suspend = udl_usb_suspend,
 166         .resume = udl_usb_resume,
 167         .id_table = id_table,
 168 };
 169 module_usb_driver(udl_driver);
 170 MODULE_LICENSE("GPL");