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