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 struct drm_device *dev = usb_get_intfdata(interface); 18 19 drm_kms_helper_poll_disable(dev); 20 return 0; 21 } 22 23 static int udl_usb_resume(struct usb_interface *interface) 24 { 25 struct drm_device *dev = usb_get_intfdata(interface); 26 27 drm_kms_helper_poll_enable(dev); 28 udl_modeset_restore(dev); 29 return 0; 30 } 31 32 static const struct vm_operations_struct udl_gem_vm_ops = { 33 .fault = udl_gem_fault, 34 .open = drm_gem_vm_open, 35 .close = drm_gem_vm_close, 36 }; 37 38 static const struct file_operations udl_driver_fops = { 39 .owner = THIS_MODULE, 40 .open = drm_open, 41 .mmap = udl_drm_gem_mmap, 42 .poll = drm_poll, 43 .read = drm_read, 44 .unlocked_ioctl = drm_ioctl, 45 .release = drm_release, 46 .compat_ioctl = drm_compat_ioctl, 47 .llseek = noop_llseek, 48 }; 49 50 static struct drm_driver driver = { 51 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, 52 .load = udl_driver_load, 53 .unload = udl_driver_unload, 54 55 /* gem hooks */ 56 .gem_free_object = udl_gem_free_object, 57 .gem_vm_ops = &udl_gem_vm_ops, 58 59 .dumb_create = udl_dumb_create, 60 .dumb_map_offset = udl_gem_mmap, 61 .fops = &udl_driver_fops, 62 63 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 64 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 65 .gem_prime_export = udl_gem_prime_export, 66 .gem_prime_import = udl_gem_prime_import, 67 68 .name = DRIVER_NAME, 69 .desc = DRIVER_DESC, 70 .date = DRIVER_DATE, 71 .major = DRIVER_MAJOR, 72 .minor = DRIVER_MINOR, 73 .patchlevel = DRIVER_PATCHLEVEL, 74 }; 75 76 static int udl_usb_probe(struct usb_interface *interface, 77 const struct usb_device_id *id) 78 { 79 struct usb_device *udev = interface_to_usbdev(interface); 80 struct drm_device *dev; 81 int r; 82 83 dev = drm_dev_alloc(&driver, &interface->dev); 84 if (IS_ERR(dev)) 85 return PTR_ERR(dev); 86 87 r = drm_dev_register(dev, (unsigned long)udev); 88 if (r) 89 goto err_free; 90 91 usb_set_intfdata(interface, dev); 92 DRM_INFO("Initialized udl on minor %d\n", dev->primary->index); 93 94 return 0; 95 96 err_free: 97 drm_dev_unref(dev); 98 return r; 99 } 100 101 static void udl_usb_disconnect(struct usb_interface *interface) 102 { 103 struct drm_device *dev = usb_get_intfdata(interface); 104 105 drm_kms_helper_poll_disable(dev); 106 udl_fbdev_unplug(dev); 107 udl_drop_usb(dev); 108 drm_dev_unplug(dev); 109 } 110 111 /* 112 * There are many DisplayLink-based graphics products, all with unique PIDs. 113 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff) 114 * We also require a match on SubClass (0x00) and Protocol (0x00), 115 * which is compatible with all known USB 2.0 era graphics chips and firmware, 116 * but allows DisplayLink to increment those for any future incompatible chips 117 */ 118 static const struct usb_device_id id_table[] = { 119 {.idVendor = 0x17e9, .bInterfaceClass = 0xff, 120 .bInterfaceSubClass = 0x00, 121 .bInterfaceProtocol = 0x00, 122 .match_flags = USB_DEVICE_ID_MATCH_VENDOR | 123 USB_DEVICE_ID_MATCH_INT_CLASS | 124 USB_DEVICE_ID_MATCH_INT_SUBCLASS | 125 USB_DEVICE_ID_MATCH_INT_PROTOCOL,}, 126 {}, 127 }; 128 MODULE_DEVICE_TABLE(usb, id_table); 129 130 static struct usb_driver udl_driver = { 131 .name = "udl", 132 .probe = udl_usb_probe, 133 .disconnect = udl_usb_disconnect, 134 .suspend = udl_usb_suspend, 135 .resume = udl_usb_resume, 136 .id_table = id_table, 137 }; 138 module_usb_driver(udl_driver); 139 MODULE_LICENSE("GPL"); 140