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/drm_usb.h> 11 #include <drm/drm_crtc_helper.h> 12 #include "udl_drv.h" 13 14 static struct drm_driver driver; 15 16 /* 17 * There are many DisplayLink-based graphics products, all with unique PIDs. 18 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff) 19 * We also require a match on SubClass (0x00) and Protocol (0x00), 20 * which is compatible with all known USB 2.0 era graphics chips and firmware, 21 * but allows DisplayLink to increment those for any future incompatible chips 22 */ 23 static struct usb_device_id id_table[] = { 24 {.idVendor = 0x17e9, .bInterfaceClass = 0xff, 25 .bInterfaceSubClass = 0x00, 26 .bInterfaceProtocol = 0x00, 27 .match_flags = USB_DEVICE_ID_MATCH_VENDOR | 28 USB_DEVICE_ID_MATCH_INT_CLASS | 29 USB_DEVICE_ID_MATCH_INT_SUBCLASS | 30 USB_DEVICE_ID_MATCH_INT_PROTOCOL,}, 31 {}, 32 }; 33 MODULE_DEVICE_TABLE(usb, id_table); 34 35 MODULE_LICENSE("GPL"); 36 udl_usb_probe(struct usb_interface * interface,const struct usb_device_id * id)37 static int udl_usb_probe(struct usb_interface *interface, 38 const struct usb_device_id *id) 39 { 40 return drm_get_usb_dev(interface, id, &driver); 41 } 42 udl_usb_disconnect(struct usb_interface * interface)43 static void udl_usb_disconnect(struct usb_interface *interface) 44 { 45 struct drm_device *dev = usb_get_intfdata(interface); 46 47 drm_kms_helper_poll_disable(dev); 48 drm_connector_unplug_all(dev); 49 udl_fbdev_unplug(dev); 50 udl_drop_usb(dev); 51 drm_unplug_dev(dev); 52 } 53 54 static const struct vm_operations_struct udl_gem_vm_ops = { 55 .fault = udl_gem_fault, 56 .open = drm_gem_vm_open, 57 .close = drm_gem_vm_close, 58 }; 59 60 static const struct file_operations udl_driver_fops = { 61 .owner = THIS_MODULE, 62 .open = drm_open, 63 .mmap = udl_drm_gem_mmap, 64 .poll = drm_poll, 65 .read = drm_read, 66 .unlocked_ioctl = drm_ioctl, 67 .release = drm_release, 68 .fasync = drm_fasync, 69 #ifdef CONFIG_COMPAT 70 .compat_ioctl = drm_compat_ioctl, 71 #endif 72 .llseek = noop_llseek, 73 }; 74 75 static struct drm_driver driver = { 76 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, 77 .load = udl_driver_load, 78 .unload = udl_driver_unload, 79 80 /* gem hooks */ 81 .gem_init_object = udl_gem_init_object, 82 .gem_free_object = udl_gem_free_object, 83 .gem_vm_ops = &udl_gem_vm_ops, 84 85 .dumb_create = udl_dumb_create, 86 .dumb_map_offset = udl_gem_mmap, 87 .dumb_destroy = udl_dumb_destroy, 88 .fops = &udl_driver_fops, 89 90 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 91 .gem_prime_import = udl_gem_prime_import, 92 93 .name = DRIVER_NAME, 94 .desc = DRIVER_DESC, 95 .date = DRIVER_DATE, 96 .major = DRIVER_MAJOR, 97 .minor = DRIVER_MINOR, 98 .patchlevel = DRIVER_PATCHLEVEL, 99 }; 100 101 static struct usb_driver udl_driver = { 102 .name = "udl", 103 .probe = udl_usb_probe, 104 .disconnect = udl_usb_disconnect, 105 .id_table = id_table, 106 }; 107 udl_init(void)108 static int __init udl_init(void) 109 { 110 return drm_usb_init(&driver, &udl_driver); 111 } 112 udl_exit(void)113 static void __exit udl_exit(void) 114 { 115 drm_usb_exit(&driver, &udl_driver); 116 } 117 118 module_init(udl_init); 119 module_exit(udl_exit); 120