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