sys/dev/usb/template/usb_template_multi.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
   5  * Copyright (c) 2018 The FreeBSD Foundation
   6  * All rights reserved.
   7  *
   8  * This software was developed by SRI International and the University of
   9  * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
  10  * ("CTSRD"), as part of the DARPA CRASH research programme.
  11  *
  12  * Portions of this software were developed by Edward Tomasz Napierala
  13  * under sponsorship from the FreeBSD Foundation.
  14  *
  15  * Redistribution and use in source and binary forms, with or without
  16  * modification, are permitted provided that the following conditions
  17  * are met:
  18  * 1. Redistributions of source code must retain the above copyright
  19  *    notice, this list of conditions and the following disclaimer.
  20  * 2. Redistributions in binary form must reproduce the above copyright
  21  *    notice, this list of conditions and the following disclaimer in the
  22  *    documentation and/or other materials provided with the distribution.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36 /*
  37  * USB template for CDC ACM (serial), CDC ECM (network), and CDC MSC (storage).
  38  */
  39
  40 #include <sys/cdefs.h>
  41 __FBSDID("$FreeBSD$");
  42
  43 #ifdef USB_GLOBAL_INCLUDE_FILE
  44 #include USB_GLOBAL_INCLUDE_FILE
  45 #else
  46 #include <sys/stdint.h>
  47 #include <sys/stddef.h>
  48 #include <sys/param.h>
  49 #include <sys/queue.h>
  50 #include <sys/types.h>
  51 #include <sys/systm.h>
  52 #include <sys/kernel.h>
  53 #include <sys/bus.h>
  54 #include <sys/module.h>
  55 #include <sys/lock.h>
  56 #include <sys/mutex.h>
  57 #include <sys/condvar.h>
  58 #include <sys/sysctl.h>
  59 #include <sys/sx.h>
  60 #include <sys/unistd.h>
  61 #include <sys/callout.h>
  62 #include <sys/malloc.h>
  63 #include <sys/priv.h>
  64
  65 #include <dev/usb/usb.h>
  66 #include <dev/usb/usbdi.h>
  67 #include <dev/usb/usb_core.h>
  68 #include <dev/usb/usb_cdc.h>
  69 #include <dev/usb/usb_ioctl.h>
  70 #include <dev/usb/usb_util.h>
  71
  72 #include <dev/usb/template/usb_template.h>
  73 #endif          /* USB_GLOBAL_INCLUDE_FILE */
  74
  75 #define MODEM_IFACE_0 0
  76 #define MODEM_IFACE_1 1
  77
  78 enum {
  79         MULTI_LANG_INDEX,
  80         MULTI_MODEM_INDEX,
  81         MULTI_ETH_MAC_INDEX,
  82         MULTI_ETH_CONTROL_INDEX,
  83         MULTI_ETH_DATA_INDEX,
  84         MULTI_STORAGE_INDEX,
  85         MULTI_CONFIGURATION_INDEX,
  86         MULTI_MANUFACTURER_INDEX,
  87         MULTI_PRODUCT_INDEX,
  88         MULTI_SERIAL_NUMBER_INDEX,
  89         MULTI_MAX_INDEX,
  90 };
  91
  92 #define MULTI_DEFAULT_VENDOR_ID         USB_TEMPLATE_VENDOR
  93 #define MULTI_DEFAULT_PRODUCT_ID        0x05dc
  94 #define MULTI_DEFAULT_MODEM             "Virtual serial port"
  95 #define MULTI_DEFAULT_ETH_MAC           "2A02030405060789AB"
  96 #define MULTI_DEFAULT_ETH_CONTROL       "Ethernet Comm Interface"
  97 #define MULTI_DEFAULT_ETH_DATA          "Ethernet Data Interface"
  98 #define MULTI_DEFAULT_STORAGE           "Mass Storage Interface"
  99 #define MULTI_DEFAULT_CONFIGURATION     "Default configuration"
 100 #define MULTI_DEFAULT_MANUFACTURER      USB_TEMPLATE_MANUFACTURER
 101 #define MULTI_DEFAULT_PRODUCT           "Multifunction Device"
 102 /*
 103  * The reason for this being called like this is that OSX
 104  * derives the device node name from it, resulting in a somewhat
 105  * user-friendly "/dev/cu.usbmodemFreeBSD1".  And yes, the "1"
 106  * needs to be there, otherwise OSX will mangle it.
 107  */
 108 #define MULTI_DEFAULT_SERIAL_NUMBER     "FreeBSD1"
 109
 110 static struct usb_string_descriptor     multi_modem;
 111 static struct usb_string_descriptor     multi_eth_mac;
 112 static struct usb_string_descriptor     multi_eth_control;
 113 static struct usb_string_descriptor     multi_eth_data;
 114 static struct usb_string_descriptor     multi_storage;
 115 static struct usb_string_descriptor     multi_configuration;
 116 static struct usb_string_descriptor     multi_manufacturer;
 117 static struct usb_string_descriptor     multi_product;
 118 static struct usb_string_descriptor     multi_serial_number;
 119
 120 static struct sysctl_ctx_list           multi_ctx_list;
 121
 122 /* prototypes */
 123
 124 static usb_temp_get_string_desc_t multi_get_string_desc;
 125
 126 static const struct usb_cdc_union_descriptor eth_union_desc = {
 127         .bLength = sizeof(eth_union_desc),
 128         .bDescriptorType = UDESC_CS_INTERFACE,
 129         .bDescriptorSubtype = UDESCSUB_CDC_UNION,
 130         .bMasterInterface = 0,          /* this is automatically updated */
 131         .bSlaveInterface[0] = 1,        /* this is automatically updated */
 132 };
 133
 134 static const struct usb_cdc_header_descriptor eth_header_desc = {
 135         .bLength = sizeof(eth_header_desc),
 136         .bDescriptorType = UDESC_CS_INTERFACE,
 137         .bDescriptorSubtype = UDESCSUB_CDC_HEADER,
 138         .bcdCDC[0] = 0x10,
 139         .bcdCDC[1] = 0x01,
 140 };
 141
 142 static const struct usb_cdc_ethernet_descriptor eth_enf_desc = {
 143         .bLength = sizeof(eth_enf_desc),
 144         .bDescriptorType = UDESC_CS_INTERFACE,
 145         .bDescriptorSubtype = UDESCSUB_CDC_ENF,
 146         .iMacAddress = MULTI_ETH_MAC_INDEX,
 147         .bmEthernetStatistics = {0, 0, 0, 0},
 148         .wMaxSegmentSize = {0xEA, 0x05},/* 1514 bytes */
 149         .wNumberMCFilters = {0, 0},
 150         .bNumberPowerFilters = 0,
 151 };
 152
 153 static const void *eth_control_if_desc[] = {
 154         &eth_union_desc,
 155         &eth_header_desc,
 156         &eth_enf_desc,
 157         NULL,
 158 };
 159
 160 static const struct usb_temp_packet_size bulk_mps = {
 161         .mps[USB_SPEED_FULL] = 64,
 162         .mps[USB_SPEED_HIGH] = 512,
 163 };
 164
 165 static const struct usb_temp_packet_size intr_mps = {
 166         .mps[USB_SPEED_FULL] = 8,
 167         .mps[USB_SPEED_HIGH] = 8,
 168 };
 169
 170 static const struct usb_temp_endpoint_desc bulk_in_ep = {
 171         .pPacketSize = &bulk_mps,
 172 #ifdef USB_HIP_IN_EP_0
 173         .bEndpointAddress = USB_HIP_IN_EP_0,
 174 #else
 175         .bEndpointAddress = UE_DIR_IN,
 176 #endif
 177         .bmAttributes = UE_BULK,
 178 };
 179
 180 static const struct usb_temp_endpoint_desc bulk_out_ep = {
 181         .pPacketSize = &bulk_mps,
 182 #ifdef USB_HIP_OUT_EP_0
 183         .bEndpointAddress = USB_HIP_OUT_EP_0,
 184 #else
 185         .bEndpointAddress = UE_DIR_OUT,
 186 #endif
 187         .bmAttributes = UE_BULK,
 188 };
 189
 190 static const struct usb_temp_endpoint_desc intr_in_ep = {
 191         .pPacketSize = &intr_mps,
 192         .bEndpointAddress = UE_DIR_IN,
 193         .bmAttributes = UE_INTERRUPT,
 194 };
 195
 196 static const struct usb_temp_endpoint_desc *eth_intr_endpoints[] = {
 197         &intr_in_ep,
 198         NULL,
 199 };
 200
 201 static const struct usb_temp_interface_desc eth_control_interface = {
 202         .ppEndpoints = eth_intr_endpoints,
 203         .ppRawDesc = eth_control_if_desc,
 204         .bInterfaceClass = UICLASS_CDC,
 205         .bInterfaceSubClass = UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL,
 206         .bInterfaceProtocol = UIPROTO_CDC_NONE,
 207         .iInterface = MULTI_ETH_CONTROL_INDEX,
 208 };
 209
 210 static const struct usb_temp_endpoint_desc *eth_data_endpoints[] = {
 211         &bulk_in_ep,
 212         &bulk_out_ep,
 213         NULL,
 214 };
 215
 216 static const struct usb_temp_interface_desc eth_data_null_interface = {
 217         .ppEndpoints = NULL,            /* no endpoints */
 218         .bInterfaceClass = UICLASS_CDC_DATA,
 219         .bInterfaceSubClass = UISUBCLASS_DATA,
 220         .bInterfaceProtocol = 0,
 221         .iInterface = MULTI_ETH_DATA_INDEX,
 222 };
 223
 224 static const struct usb_temp_interface_desc eth_data_interface = {
 225         .ppEndpoints = eth_data_endpoints,
 226         .bInterfaceClass = UICLASS_CDC_DATA,
 227         .bInterfaceSubClass = UISUBCLASS_DATA,
 228         .bInterfaceProtocol = 0,
 229         .iInterface = MULTI_ETH_DATA_INDEX,
 230         .isAltInterface = 1,            /* this is an alternate setting */
 231 };
 232
 233 static const struct usb_temp_packet_size modem_bulk_mps = {
 234         .mps[USB_SPEED_LOW] = 8,
 235         .mps[USB_SPEED_FULL] = 64,
 236         .mps[USB_SPEED_HIGH] = 512,
 237 };
 238
 239 static const struct usb_temp_packet_size modem_intr_mps = {
 240         .mps[USB_SPEED_LOW] = 8,
 241         .mps[USB_SPEED_FULL] = 8,
 242         .mps[USB_SPEED_HIGH] = 8,
 243 };
 244
 245 static const struct usb_temp_interval modem_intr_interval = {
 246         .bInterval[USB_SPEED_LOW] = 8,  /* 8ms */
 247         .bInterval[USB_SPEED_FULL] = 8, /* 8ms */
 248         .bInterval[USB_SPEED_HIGH] = 7, /* 8ms */
 249 };
 250
 251 static const struct usb_temp_endpoint_desc modem_ep_0 = {
 252         .pPacketSize = &modem_intr_mps,
 253         .pIntervals = &modem_intr_interval,
 254         .bEndpointAddress = UE_DIR_IN,
 255         .bmAttributes = UE_INTERRUPT,
 256 };
 257
 258 static const struct usb_temp_endpoint_desc modem_ep_1 = {
 259         .pPacketSize = &modem_bulk_mps,
 260         .bEndpointAddress = UE_DIR_OUT,
 261         .bmAttributes = UE_BULK,
 262 };
 263
 264 static const struct usb_temp_endpoint_desc modem_ep_2 = {
 265         .pPacketSize = &modem_bulk_mps,
 266         .bEndpointAddress = UE_DIR_IN,
 267         .bmAttributes = UE_BULK,
 268 };
 269
 270 static const struct usb_temp_endpoint_desc *modem_iface_0_ep[] = {
 271         &modem_ep_0,
 272         NULL,
 273 };
 274
 275 static const struct usb_temp_endpoint_desc *modem_iface_1_ep[] = {
 276         &modem_ep_1,
 277         &modem_ep_2,
 278         NULL,
 279 };
 280
 281 static const uint8_t modem_raw_desc_0[] = {
 282         0x05, 0x24, 0x00, 0x10, 0x01
 283 };
 284
 285 static const uint8_t modem_raw_desc_1[] = {
 286         0x05, 0x24, 0x06, MODEM_IFACE_0, MODEM_IFACE_1
 287 };
 288
 289 static const uint8_t modem_raw_desc_2[] = {
 290         0x05, 0x24, 0x01, 0x03, MODEM_IFACE_1
 291 };
 292
 293 static const uint8_t modem_raw_desc_3[] = {
 294         0x04, 0x24, 0x02, 0x07
 295 };
 296
 297 static const void *modem_iface_0_desc[] = {
 298         &modem_raw_desc_0,
 299         &modem_raw_desc_1,
 300         &modem_raw_desc_2,
 301         &modem_raw_desc_3,
 302         NULL,
 303 };
 304
 305 static const struct usb_temp_interface_desc modem_iface_0 = {
 306         .ppRawDesc = modem_iface_0_desc,
 307         .ppEndpoints = modem_iface_0_ep,
 308         .bInterfaceClass = UICLASS_CDC,
 309         .bInterfaceSubClass = UISUBCLASS_ABSTRACT_CONTROL_MODEL,
 310         .bInterfaceProtocol = UIPROTO_CDC_NONE,
 311         .iInterface = MULTI_MODEM_INDEX,
 312 };
 313
 314 static const struct usb_temp_interface_desc modem_iface_1 = {
 315         .ppEndpoints = modem_iface_1_ep,
 316         .bInterfaceClass = UICLASS_CDC_DATA,
 317         .bInterfaceSubClass = UISUBCLASS_DATA,
 318         .bInterfaceProtocol = 0,
 319         .iInterface = MULTI_MODEM_INDEX,
 320 };
 321
 322 static const struct usb_temp_packet_size msc_bulk_mps = {
 323         .mps[USB_SPEED_FULL] = 64,
 324         .mps[USB_SPEED_HIGH] = 512,
 325 };
 326
 327 static const struct usb_temp_endpoint_desc msc_bulk_in_ep = {
 328         .pPacketSize = &msc_bulk_mps,
 329 #ifdef USB_HIP_IN_EP_0
 330         .bEndpointAddress = USB_HIP_IN_EP_0,
 331 #else
 332         .bEndpointAddress = UE_DIR_IN,
 333 #endif
 334         .bmAttributes = UE_BULK,
 335 };
 336
 337 static const struct usb_temp_endpoint_desc msc_bulk_out_ep = {
 338         .pPacketSize = &msc_bulk_mps,
 339 #ifdef USB_HIP_OUT_EP_0
 340         .bEndpointAddress = USB_HIP_OUT_EP_0,
 341 #else
 342         .bEndpointAddress = UE_DIR_OUT,
 343 #endif
 344         .bmAttributes = UE_BULK,
 345 };
 346
 347 static const struct usb_temp_endpoint_desc *msc_data_endpoints[] = {
 348         &msc_bulk_in_ep,
 349         &msc_bulk_out_ep,
 350         NULL,
 351 };
 352
 353 static const struct usb_temp_interface_desc msc_data_interface = {
 354         .ppEndpoints = msc_data_endpoints,
 355         .bInterfaceClass = UICLASS_MASS,
 356         .bInterfaceSubClass = UISUBCLASS_SCSI,
 357         .bInterfaceProtocol = UIPROTO_MASS_BBB,
 358         .iInterface = MULTI_STORAGE_INDEX,
 359 };
 360
 361 static const struct usb_temp_interface_desc *multi_interfaces[] = {
 362         &modem_iface_0,
 363         &modem_iface_1,
 364         &eth_control_interface,
 365         &eth_data_null_interface,
 366         &eth_data_interface,
 367         &msc_data_interface,
 368         NULL,
 369 };
 370
 371 static const struct usb_temp_config_desc multi_config_desc = {
 372         .ppIfaceDesc = multi_interfaces,
 373         .bmAttributes = 0,
 374         .bMaxPower = 0,
 375         .iConfiguration = MULTI_CONFIGURATION_INDEX,
 376 };
 377 static const struct usb_temp_config_desc *multi_configs[] = {
 378         &multi_config_desc,
 379         NULL,
 380 };
 381
 382 struct usb_temp_device_desc usb_template_multi = {
 383         .getStringDesc = &multi_get_string_desc,
 384         .ppConfigDesc = multi_configs,
 385         .idVendor = MULTI_DEFAULT_VENDOR_ID,
 386         .idProduct = MULTI_DEFAULT_PRODUCT_ID,
 387         .bcdDevice = 0x0100,
 388         .bDeviceClass = UDCLASS_IN_INTERFACE,
 389         .bDeviceSubClass = 0,
 390         .bDeviceProtocol = 0,
 391         .iManufacturer = MULTI_MANUFACTURER_INDEX,
 392         .iProduct = MULTI_PRODUCT_INDEX,
 393         .iSerialNumber = MULTI_SERIAL_NUMBER_INDEX,
 394 };
 395
 396 /*------------------------------------------------------------------------*
 397  *      multi_get_string_desc
 398  *
 399  * Return values:
 400  * NULL: Failure. No such string.
 401  * Else: Success. Pointer to string descriptor is returned.
 402  *------------------------------------------------------------------------*/
 403 static const void *
 404 multi_get_string_desc(uint16_t lang_id, uint8_t string_index)
 405 {
 406         static const void *ptr[MULTI_MAX_INDEX] = {
 407                 [MULTI_LANG_INDEX] = &usb_string_lang_en,
 408                 [MULTI_MODEM_INDEX] = &multi_modem,
 409                 [MULTI_ETH_MAC_INDEX] = &multi_eth_mac,
 410                 [MULTI_ETH_CONTROL_INDEX] = &multi_eth_control,
 411                 [MULTI_ETH_DATA_INDEX] = &multi_eth_data,
 412                 [MULTI_STORAGE_INDEX] = &multi_storage,
 413                 [MULTI_CONFIGURATION_INDEX] = &multi_configuration,
 414                 [MULTI_MANUFACTURER_INDEX] = &multi_manufacturer,
 415                 [MULTI_PRODUCT_INDEX] = &multi_product,
 416                 [MULTI_SERIAL_NUMBER_INDEX] = &multi_serial_number,
 417         };
 418
 419         if (string_index == 0) {
 420                 return (&usb_string_lang_en);
 421         }
 422         if (lang_id != 0x0409) {
 423                 return (NULL);
 424         }
 425         if (string_index < MULTI_MAX_INDEX) {
 426                 return (ptr[string_index]);
 427         }
 428         return (NULL);
 429 }
 430
 431 static void
 432 multi_init(void *arg __unused)
 433 {
 434         struct sysctl_oid *parent;
 435         char parent_name[3];
 436
 437         usb_make_str_desc(&multi_modem, sizeof(multi_modem),
 438             MULTI_DEFAULT_MODEM);
 439         usb_make_str_desc(&multi_eth_mac, sizeof(multi_eth_mac),
 440             MULTI_DEFAULT_ETH_MAC);
 441         usb_make_str_desc(&multi_eth_control, sizeof(multi_eth_control),
 442             MULTI_DEFAULT_ETH_CONTROL);
 443         usb_make_str_desc(&multi_eth_data, sizeof(multi_eth_data),
 444             MULTI_DEFAULT_ETH_DATA);
 445         usb_make_str_desc(&multi_storage, sizeof(multi_storage),
 446             MULTI_DEFAULT_STORAGE);
 447         usb_make_str_desc(&multi_configuration, sizeof(multi_configuration),
 448             MULTI_DEFAULT_CONFIGURATION);
 449         usb_make_str_desc(&multi_manufacturer, sizeof(multi_manufacturer),
 450             MULTI_DEFAULT_MANUFACTURER);
 451         usb_make_str_desc(&multi_product, sizeof(multi_product),
 452             MULTI_DEFAULT_PRODUCT);
 453         usb_make_str_desc(&multi_serial_number, sizeof(multi_serial_number),
 454             MULTI_DEFAULT_SERIAL_NUMBER);
 455
 456         snprintf(parent_name, sizeof(parent_name), "%d", USB_TEMP_MULTI);
 457         sysctl_ctx_init(&multi_ctx_list);
 458
 459         parent = SYSCTL_ADD_NODE(&multi_ctx_list,
 460             SYSCTL_STATIC_CHILDREN(_hw_usb_templates), OID_AUTO,
 461             parent_name, CTLFLAG_RW,
 462             0, "USB Multifunction device side template");
 463         SYSCTL_ADD_U16(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 464             "vendor_id", CTLFLAG_RWTUN,
 465             &usb_template_multi.idVendor, 1, "Vendor identifier");
 466         SYSCTL_ADD_U16(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 467             "product_id", CTLFLAG_RWTUN,
 468             &usb_template_multi.idProduct, 1, "Product identifier");
 469         SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 470             "eth_mac", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
 471             &multi_eth_mac, sizeof(multi_eth_mac), usb_temp_sysctl,
 472             "A", "Ethernet MAC address string");
 473 #if 0
 474         SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 475             "modem", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
 476             &multi_modem, sizeof(multi_modem), usb_temp_sysctl,
 477             "A", "Modem interface string");
 478         SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 479             "eth_control", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
 480             &multi_eth_control, sizeof(multi_eth_data), usb_temp_sysctl,
 481             "A", "Ethernet control interface string");
 482         SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 483             "eth_data", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
 484             &multi_eth_data, sizeof(multi_eth_data), usb_temp_sysctl,
 485             "A", "Ethernet data interface string");
 486         SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 487             "interface", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
 488             &multi_storage, sizeof(multi_storage), usb_temp_sysctl,
 489             "A", "Storage interface string");
 490         SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 491             "configuration", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
 492             &multi_configuration, sizeof(multi_configuration), usb_temp_sysctl,
 493             "A", "Configuration string");
 494 #endif
 495         SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 496             "manufacturer", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
 497             &multi_manufacturer, sizeof(multi_manufacturer), usb_temp_sysctl,
 498             "A", "Manufacturer string");
 499         SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 500             "product", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
 501             &multi_product, sizeof(multi_product), usb_temp_sysctl,
 502             "A", "Product string");
 503         SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
 504             "serial_number", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
 505             &multi_serial_number, sizeof(multi_serial_number), usb_temp_sysctl,
 506             "A", "Serial number string");
 507 }
 508
 509 static void
 510 multi_uninit(void *arg __unused)
 511 {
 512
 513         sysctl_ctx_free(&multi_ctx_list);
 514 }
 515
 516 SYSINIT(multi_init, SI_SUB_LOCK, SI_ORDER_FIRST, multi_init, NULL);
 517 SYSUNINIT(multi_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, multi_uninit, NULL);