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