1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012 Red Hat 4 */ 5 6 #include <linux/module.h> 7 8 #include <drm/drm_crtc_helper.h> 9 #include <drm/drm_drv.h> 10 #include <drm/drm_file.h> 11 #include <drm/drm_ioctl.h> 12 #include <drm/drm_probe_helper.h> 13 #include <drm/drm_print.h> 14 15 #include "udl_drv.h" 16 17 static int udl_usb_suspend(struct usb_interface *interface, 18 pm_message_t message) 19 { 20 struct drm_device *dev = usb_get_intfdata(interface); 21 22 drm_kms_helper_poll_disable(dev); 23 return 0; 24 } 25 26 static int udl_usb_resume(struct usb_interface *interface) 27 { 28 struct drm_device *dev = usb_get_intfdata(interface); 29 30 drm_kms_helper_poll_enable(dev); 31 udl_modeset_restore(dev); 32 return 0; 33 } 34 35 static const struct vm_operations_struct udl_gem_vm_ops = { 36 .fault = udl_gem_fault, 37 .open = drm_gem_vm_open, 38 .close = drm_gem_vm_close, 39 }; 40 41 static const struct file_operations udl_driver_fops = { 42 .owner = THIS_MODULE, 43 .open = drm_open, 44 .mmap = udl_drm_gem_mmap, 45 .poll = drm_poll, 46 .read = drm_read, 47 .unlocked_ioctl = drm_ioctl, 48 .release = drm_release, 49 .compat_ioctl = drm_compat_ioctl, 50 .llseek = noop_llseek, 51 }; 52 53 static void udl_driver_release(struct drm_device *dev) 54 { 55 udl_fini(dev); 56 udl_modeset_cleanup(dev); 57 drm_dev_fini(dev); 58 kfree(dev); 59 } 60 61 static struct drm_driver driver = { 62 .driver_features = DRIVER_MODESET | DRIVER_GEM, 63 .release = udl_driver_release, 64 65 /* gem hooks */ 66 .gem_free_object_unlocked = udl_gem_free_object, 67 .gem_vm_ops = &udl_gem_vm_ops, 68 69 .dumb_create = udl_dumb_create, 70 .dumb_map_offset = udl_gem_mmap, 71 .fops = &udl_driver_fops, 72 73 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 74 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 75 .gem_prime_export = udl_gem_prime_export, 76 .gem_prime_import = udl_gem_prime_import, 77 78 .name = DRIVER_NAME, 79 .desc = DRIVER_DESC, 80 .date = DRIVER_DATE, 81 .major = DRIVER_MAJOR, 82 .minor = DRIVER_MINOR, 83 .patchlevel = DRIVER_PATCHLEVEL, 84 }; 85 86 static struct udl_device *udl_driver_create(struct usb_interface *interface) 87 { 88 struct usb_device *udev = interface_to_usbdev(interface); 89 struct udl_device *udl; 90 int r; 91 92 udl = kzalloc(sizeof(*udl), GFP_KERNEL); 93 if (!udl) 94 return ERR_PTR(-ENOMEM); 95 96 r = drm_dev_init(&udl->drm, &driver, &interface->dev); 97 if (r) { 98 kfree(udl); 99 return ERR_PTR(r); 100 } 101 102 udl->udev = udev; 103 udl->drm.dev_private = udl; 104 105 r = udl_init(udl); 106 if (r) { 107 drm_dev_fini(&udl->drm); 108 kfree(udl); 109 return ERR_PTR(r); 110 } 111 112 usb_set_intfdata(interface, udl); 113 return udl; 114 } 115 116 static int udl_usb_probe(struct usb_interface *interface, 117 const struct usb_device_id *id) 118 { 119 int r; 120 struct udl_device *udl; 121 122 udl = udl_driver_create(interface); 123 if (IS_ERR(udl)) 124 return PTR_ERR(udl); 125 126 r = drm_dev_register(&udl->drm, 0); 127 if (r) 128 goto err_free; 129 130 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index); 131 132 return 0; 133 134 err_free: 135 drm_dev_put(&udl->drm); 136 return r; 137 } 138 139 static void udl_usb_disconnect(struct usb_interface *interface) 140 { 141 struct drm_device *dev = usb_get_intfdata(interface); 142 143 drm_kms_helper_poll_disable(dev); 144 udl_fbdev_unplug(dev); 145 udl_drop_usb(dev); 146 drm_dev_unplug(dev); 147 drm_dev_put(dev); 148 } 149 150 /* 151 * There are many DisplayLink-based graphics products, all with unique PIDs. 152 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff) 153 * We also require a match on SubClass (0x00) and Protocol (0x00), 154 * which is compatible with all known USB 2.0 era graphics chips and firmware, 155 * but allows DisplayLink to increment those for any future incompatible chips 156 */ 157 static const struct usb_device_id id_table[] = { 158 {.idVendor = 0x17e9, .bInterfaceClass = 0xff, 159 .bInterfaceSubClass = 0x00, 160 .bInterfaceProtocol = 0x00, 161 .match_flags = USB_DEVICE_ID_MATCH_VENDOR | 162 USB_DEVICE_ID_MATCH_INT_CLASS | 163 USB_DEVICE_ID_MATCH_INT_SUBCLASS | 164 USB_DEVICE_ID_MATCH_INT_PROTOCOL,}, 165 {}, 166 }; 167 MODULE_DEVICE_TABLE(usb, id_table); 168 169 static struct usb_driver udl_driver = { 170 .name = "udl", 171 .probe = udl_usb_probe, 172 .disconnect = udl_usb_disconnect, 173 .suspend = udl_usb_suspend, 174 .resume = udl_usb_resume, 175 .id_table = id_table, 176 }; 177 module_usb_driver(udl_driver); 178 MODULE_LICENSE("GPL"); 179