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