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_driver_set_busid(struct drm_device *d, struct drm_master *m) 15 { 16 return 0; 17 } 18 19 static const struct vm_operations_struct udl_gem_vm_ops = { 20 .fault = udl_gem_fault, 21 .open = drm_gem_vm_open, 22 .close = drm_gem_vm_close, 23 }; 24 25 static const struct file_operations udl_driver_fops = { 26 .owner = THIS_MODULE, 27 .open = drm_open, 28 .mmap = udl_drm_gem_mmap, 29 .poll = drm_poll, 30 .read = drm_read, 31 .unlocked_ioctl = drm_ioctl, 32 .release = drm_release, 33 #ifdef CONFIG_COMPAT 34 .compat_ioctl = drm_compat_ioctl, 35 #endif 36 .llseek = noop_llseek, 37 }; 38 39 static struct drm_driver driver = { 40 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, 41 .load = udl_driver_load, 42 .unload = udl_driver_unload, 43 .set_busid = udl_driver_set_busid, 44 45 /* gem hooks */ 46 .gem_free_object = udl_gem_free_object, 47 .gem_vm_ops = &udl_gem_vm_ops, 48 49 .dumb_create = udl_dumb_create, 50 .dumb_map_offset = udl_gem_mmap, 51 .dumb_destroy = drm_gem_dumb_destroy, 52 .fops = &udl_driver_fops, 53 54 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 55 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 56 .gem_prime_export = udl_gem_prime_export, 57 .gem_prime_import = udl_gem_prime_import, 58 59 .name = DRIVER_NAME, 60 .desc = DRIVER_DESC, 61 .date = DRIVER_DATE, 62 .major = DRIVER_MAJOR, 63 .minor = DRIVER_MINOR, 64 .patchlevel = DRIVER_PATCHLEVEL, 65 }; 66 67 static int udl_usb_probe(struct usb_interface *interface, 68 const struct usb_device_id *id) 69 { 70 struct usb_device *udev = interface_to_usbdev(interface); 71 struct drm_device *dev; 72 int r; 73 74 dev = drm_dev_alloc(&driver, &interface->dev); 75 if (!dev) 76 return -ENOMEM; 77 78 r = drm_dev_register(dev, (unsigned long)udev); 79 if (r) 80 goto err_free; 81 82 usb_set_intfdata(interface, dev); 83 DRM_INFO("Initialized udl on minor %d\n", dev->primary->index); 84 85 return 0; 86 87 err_free: 88 drm_dev_unref(dev); 89 return r; 90 } 91 92 static void udl_usb_disconnect(struct usb_interface *interface) 93 { 94 struct drm_device *dev = usb_get_intfdata(interface); 95 96 drm_kms_helper_poll_disable(dev); 97 drm_connector_unregister_all(dev); 98 udl_fbdev_unplug(dev); 99 udl_drop_usb(dev); 100 drm_unplug_dev(dev); 101 } 102 103 /* 104 * There are many DisplayLink-based graphics products, all with unique PIDs. 105 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff) 106 * We also require a match on SubClass (0x00) and Protocol (0x00), 107 * which is compatible with all known USB 2.0 era graphics chips and firmware, 108 * but allows DisplayLink to increment those for any future incompatible chips 109 */ 110 static struct usb_device_id id_table[] = { 111 {.idVendor = 0x17e9, .bInterfaceClass = 0xff, 112 .bInterfaceSubClass = 0x00, 113 .bInterfaceProtocol = 0x00, 114 .match_flags = USB_DEVICE_ID_MATCH_VENDOR | 115 USB_DEVICE_ID_MATCH_INT_CLASS | 116 USB_DEVICE_ID_MATCH_INT_SUBCLASS | 117 USB_DEVICE_ID_MATCH_INT_PROTOCOL,}, 118 {}, 119 }; 120 MODULE_DEVICE_TABLE(usb, id_table); 121 122 static struct usb_driver udl_driver = { 123 .name = "udl", 124 .probe = udl_usb_probe, 125 .disconnect = udl_usb_disconnect, 126 .id_table = id_table, 127 }; 128 module_usb_driver(udl_driver); 129 MODULE_LICENSE("GPL"); 130