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 void udl_driver_release(struct drm_device *dev) 52 { 53 udl_fini(dev); 54 udl_modeset_cleanup(dev); 55 drm_dev_fini(dev); 56 kfree(dev); 57 } 58 59 static struct drm_driver driver = { 60 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, 61 .release = udl_driver_release, 62 63 /* gem hooks */ 64 .gem_free_object_unlocked = udl_gem_free_object, 65 .gem_vm_ops = &udl_gem_vm_ops, 66 67 .dumb_create = udl_dumb_create, 68 .dumb_map_offset = udl_gem_mmap, 69 .fops = &udl_driver_fops, 70 71 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 72 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 73 .gem_prime_export = udl_gem_prime_export, 74 .gem_prime_import = udl_gem_prime_import, 75 76 .name = DRIVER_NAME, 77 .desc = DRIVER_DESC, 78 .date = DRIVER_DATE, 79 .major = DRIVER_MAJOR, 80 .minor = DRIVER_MINOR, 81 .patchlevel = DRIVER_PATCHLEVEL, 82 }; 83 84 static struct udl_device *udl_driver_create(struct usb_interface *interface) 85 { 86 struct usb_device *udev = interface_to_usbdev(interface); 87 struct udl_device *udl; 88 int r; 89 90 udl = kzalloc(sizeof(*udl), GFP_KERNEL); 91 if (!udl) 92 return ERR_PTR(-ENOMEM); 93 94 r = drm_dev_init(&udl->drm, &driver, &interface->dev); 95 if (r) { 96 kfree(udl); 97 return ERR_PTR(r); 98 } 99 100 udl->udev = udev; 101 udl->drm.dev_private = udl; 102 103 r = udl_init(udl); 104 if (r) { 105 drm_dev_fini(&udl->drm); 106 kfree(udl); 107 return ERR_PTR(r); 108 } 109 110 usb_set_intfdata(interface, udl); 111 return udl; 112 } 113 114 static int udl_usb_probe(struct usb_interface *interface, 115 const struct usb_device_id *id) 116 { 117 int r; 118 struct udl_device *udl; 119 120 udl = udl_driver_create(interface); 121 if (IS_ERR(udl)) 122 return PTR_ERR(udl); 123 124 r = drm_dev_register(&udl->drm, 0); 125 if (r) 126 goto err_free; 127 128 DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index); 129 130 return 0; 131 132 err_free: 133 drm_dev_put(&udl->drm); 134 return r; 135 } 136 137 static void udl_usb_disconnect(struct usb_interface *interface) 138 { 139 struct drm_device *dev = usb_get_intfdata(interface); 140 141 drm_kms_helper_poll_disable(dev); 142 udl_fbdev_unplug(dev); 143 udl_drop_usb(dev); 144 drm_dev_unplug(dev); 145 drm_dev_put(dev); 146 } 147 148 /* 149 * There are many DisplayLink-based graphics products, all with unique PIDs. 150 * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff) 151 * We also require a match on SubClass (0x00) and Protocol (0x00), 152 * which is compatible with all known USB 2.0 era graphics chips and firmware, 153 * but allows DisplayLink to increment those for any future incompatible chips 154 */ 155 static const struct usb_device_id id_table[] = { 156 {.idVendor = 0x17e9, .bInterfaceClass = 0xff, 157 .bInterfaceSubClass = 0x00, 158 .bInterfaceProtocol = 0x00, 159 .match_flags = USB_DEVICE_ID_MATCH_VENDOR | 160 USB_DEVICE_ID_MATCH_INT_CLASS | 161 USB_DEVICE_ID_MATCH_INT_SUBCLASS | 162 USB_DEVICE_ID_MATCH_INT_PROTOCOL,}, 163 {}, 164 }; 165 MODULE_DEVICE_TABLE(usb, id_table); 166 167 static struct usb_driver udl_driver = { 168 .name = "udl", 169 .probe = udl_usb_probe, 170 .disconnect = udl_usb_disconnect, 171 .suspend = udl_usb_suspend, 172 .resume = udl_usb_resume, 173 .id_table = id_table, 174 }; 175 module_usb_driver(udl_driver); 176 MODULE_LICENSE("GPL"); 177