mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-13 19:18:56 +00:00
573 lines
20 KiB
C
573 lines
20 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include STM32_HAL_H
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#include "usb.h"
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#include "common.h"
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#include "rdi.h"
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#include "usbd_core.h"
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#define USB_MAX_CONFIG_DESC_SIZE 256
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#define USB_MAX_STR_SIZE 62
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#define USB_MAX_STR_DESC_SIZE (USB_MAX_STR_SIZE * 2 + 2)
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#if defined(USE_USB_FS)
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#define USB_PHY_ID USB_PHY_FS_ID
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#elif defined(USE_USB_HS) && defined(USE_USB_HS_IN_FS)
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#define USB_PHY_ID USB_PHY_HS_ID
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#else
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#error Unable to determine proper USB_PHY_ID to use
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#endif
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#define USB_WINUSB_VENDOR_CODE \
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'!' // arbitrary, but must be equivalent to the last character in extra
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// string
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#define USB_WINUSB_EXTRA_STRING \
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'M', 0x00, 'S', 0x00, 'F', 0x00, 'T', 0x00, '1', 0x00, '0', 0x00, '0', 0x00, \
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USB_WINUSB_VENDOR_CODE, 0x00 // MSFT100!
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#define USB_WINUSB_EXTRA_STRING_INDEX 0xEE
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#define USB_WINUSB_REQ_GET_COMPATIBLE_ID_FEATURE_DESCRIPTOR 0x04
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#define USB_WINUSB_REQ_GET_EXTENDED_PROPERTIES_OS_FEATURE_DESCRIPTOR 0x05
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#define UNCONST(X) ((uint8_t *)(X))
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static usb_device_descriptor_t usb_dev_desc;
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// Config descriptor
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static uint8_t usb_config_buf[USB_MAX_CONFIG_DESC_SIZE]
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__attribute__((aligned(4)));
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static usb_config_descriptor_t *usb_config_desc =
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(usb_config_descriptor_t *)(usb_config_buf);
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static usb_interface_descriptor_t *usb_next_iface_desc;
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// String descriptor
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static uint8_t usb_str_buf[USB_MAX_STR_DESC_SIZE] __attribute__((aligned(4)));
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static usb_dev_string_table_t usb_str_table;
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static usb_iface_t usb_ifaces[USBD_MAX_NUM_INTERFACES];
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static USBD_HandleTypeDef usb_dev_handle;
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static const USBD_DescriptorsTypeDef usb_descriptors;
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static const USBD_ClassTypeDef usb_class;
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static secbool usb21_enabled = secfalse;
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static secbool usb21_landing = secfalse;
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static secbool __wur check_desc_str(const char *s) {
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if (NULL == s) return secfalse;
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if (strlen(s) > USB_MAX_STR_SIZE) return secfalse;
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return sectrue;
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}
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void usb_init(const usb_dev_info_t *dev_info) {
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// enable/disable USB 2.1 features
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usb21_enabled = dev_info->usb21_enabled;
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usb21_landing = dev_info->usb21_landing;
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// Device descriptor
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usb_dev_desc.bLength = sizeof(usb_device_descriptor_t);
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usb_dev_desc.bDescriptorType = USB_DESC_TYPE_DEVICE;
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usb_dev_desc.bcdUSB =
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(sectrue == usb21_enabled) ? 0x0210 : 0x0200; // USB 2.1 or USB 2.0
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usb_dev_desc.bDeviceClass = dev_info->device_class;
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usb_dev_desc.bDeviceSubClass = dev_info->device_subclass;
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usb_dev_desc.bDeviceProtocol = dev_info->device_protocol;
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usb_dev_desc.bMaxPacketSize0 = USB_MAX_EP0_SIZE;
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usb_dev_desc.idVendor = dev_info->vendor_id;
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usb_dev_desc.idProduct = dev_info->product_id;
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usb_dev_desc.bcdDevice = dev_info->release_num;
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usb_dev_desc.iManufacturer =
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USBD_IDX_MFC_STR; // Index of manufacturer string
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usb_dev_desc.iProduct = USBD_IDX_PRODUCT_STR; // Index of product string
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usb_dev_desc.iSerialNumber =
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USBD_IDX_SERIAL_STR; // Index of serial number string
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usb_dev_desc.bNumConfigurations = 1;
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// String table
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ensure(check_desc_str(dev_info->manufacturer), NULL);
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ensure(check_desc_str(dev_info->product), NULL);
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ensure(check_desc_str(dev_info->serial_number), NULL);
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ensure(check_desc_str(dev_info->interface), NULL);
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usb_str_table.manufacturer = dev_info->manufacturer;
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usb_str_table.product = dev_info->product;
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usb_str_table.serial_number = dev_info->serial_number;
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usb_str_table.interface = dev_info->interface;
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// Configuration descriptor
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usb_config_desc->bLength = sizeof(usb_config_descriptor_t);
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usb_config_desc->bDescriptorType = USB_DESC_TYPE_CONFIGURATION;
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usb_config_desc->wTotalLength =
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sizeof(usb_config_descriptor_t); // will be updated later via
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// usb_desc_add_iface()
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usb_config_desc->bNumInterfaces =
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0; // will be updated later via usb_desc_add_iface()
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usb_config_desc->bConfigurationValue = 0x01;
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usb_config_desc->iConfiguration = 0;
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usb_config_desc->bmAttributes =
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0x80; // 0x80 = bus powered; 0xC0 = self powered
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usb_config_desc->bMaxPower = 0x32; // Maximum Power Consumption in 2mA units
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// Pointer to interface descriptor data
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usb_next_iface_desc =
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(usb_interface_descriptor_t *)(usb_config_buf +
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usb_config_desc->wTotalLength);
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ensure(sectrue *
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(USBD_OK == USBD_Init(&usb_dev_handle,
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(USBD_DescriptorsTypeDef *)&usb_descriptors,
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USB_PHY_ID)),
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NULL);
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ensure(sectrue *
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(USBD_OK == USBD_RegisterClass(&usb_dev_handle,
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(USBD_ClassTypeDef *)&usb_class)),
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NULL);
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}
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void usb_deinit(void) {
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USBD_DeInit(&usb_dev_handle);
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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usb_ifaces[i].type = USB_IFACE_TYPE_DISABLED;
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}
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}
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void usb_start(void) { USBD_Start(&usb_dev_handle); }
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void usb_stop(void) { USBD_Stop(&usb_dev_handle); }
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/*
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* Utility functions for USB interfaces
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*/
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static usb_iface_t *usb_get_iface(uint8_t iface_num) {
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if (iface_num < USBD_MAX_NUM_INTERFACES) {
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return &usb_ifaces[iface_num];
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} else {
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return NULL; // Invalid interface number
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}
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}
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static void *usb_desc_alloc_iface(size_t desc_len) {
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if (usb_config_desc->wTotalLength + desc_len < USB_MAX_CONFIG_DESC_SIZE) {
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return usb_next_iface_desc;
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} else {
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return NULL; // Not enough space in the descriptor
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}
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}
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static void usb_desc_add_iface(size_t desc_len) {
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usb_config_desc->bNumInterfaces++;
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usb_config_desc->wTotalLength += desc_len;
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usb_next_iface_desc =
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(usb_interface_descriptor_t *)(usb_config_buf +
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usb_config_desc->wTotalLength);
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}
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/*
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* USB interface implementations
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*/
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#include "usb_hid-impl.h"
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#include "usb_vcp-impl.h"
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#include "usb_webusb-impl.h"
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/*
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* USB configuration (device & string descriptors)
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*/
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static uint8_t *usb_get_dev_descriptor(USBD_SpeedTypeDef speed,
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uint16_t *length) {
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*length = sizeof(usb_dev_desc);
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return (uint8_t *)(&usb_dev_desc);
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}
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static uint8_t *usb_get_langid_str_descriptor(USBD_SpeedTypeDef speed,
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uint16_t *length) {
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static const usb_langid_descriptor_t usb_langid_str_desc = {
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.bLength = USB_LEN_LANGID_STR_DESC,
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.bDescriptorType = USB_DESC_TYPE_STRING,
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.wData = USB_LANGID_ENGLISH_US,
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};
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*length = sizeof(usb_langid_str_desc);
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return UNCONST(&usb_langid_str_desc);
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}
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static uint8_t *usb_get_manufacturer_str_descriptor(USBD_SpeedTypeDef speed,
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uint16_t *length) {
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USBD_GetString((uint8_t *)usb_str_table.manufacturer, usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_product_str_descriptor(USBD_SpeedTypeDef speed,
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uint16_t *length) {
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USBD_GetString((uint8_t *)usb_str_table.product, usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_serial_str_descriptor(USBD_SpeedTypeDef speed,
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uint16_t *length) {
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USBD_GetString((uint8_t *)usb_str_table.serial_number, usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_configuration_str_descriptor(USBD_SpeedTypeDef speed,
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uint16_t *length) {
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USBD_GetString((uint8_t *)"", usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_interface_str_descriptor(USBD_SpeedTypeDef speed,
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uint16_t *length) {
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USBD_GetString((uint8_t *)usb_str_table.interface, usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_bos_descriptor(USBD_SpeedTypeDef speed,
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uint16_t *length) {
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if (sectrue == usb21_enabled) {
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static uint8_t bos[] = {
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// usb_bos_descriptor {
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0x05, // uint8_t bLength
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USB_DESC_TYPE_BOS, // uint8_t bDescriptorType
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0x1d, 0x0, // uint16_t wTotalLength
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0x01, // uint8_t bNumDeviceCaps
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// }
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// usb_device_capability_descriptor {
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0x18, // uint8_t bLength
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USB_DESC_TYPE_DEVICE_CAPABILITY, // uint8_t bDescriptorType
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USB_DEVICE_CAPABILITY_PLATFORM, // uint8_t bDevCapabilityType
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0x00, // uint8_t bReserved
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0x38, 0xb6, 0x08, 0x34, 0xa9, 0x09, 0xa0, 0x47, 0x8b, 0xfd, 0xa0, 0x76,
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0x88, 0x15, 0xb6, 0x65, // uint128_t platformCompatibilityUUID
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0x00, 0x01, // uint16_t bcdVersion
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USB_WEBUSB_VENDOR_CODE, // uint8_t bVendorCode
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USB_WEBUSB_LANDING_PAGE, // uint8_t iLandingPage
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// }
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};
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bos[28] = (sectrue == usb21_landing) ? USB_WEBUSB_LANDING_PAGE : 0;
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*length = sizeof(bos);
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return UNCONST(bos);
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} else {
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*length = 0;
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return NULL;
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}
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}
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static const USBD_DescriptorsTypeDef usb_descriptors = {
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.GetDeviceDescriptor = usb_get_dev_descriptor,
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.GetLangIDStrDescriptor = usb_get_langid_str_descriptor,
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.GetManufacturerStrDescriptor = usb_get_manufacturer_str_descriptor,
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.GetProductStrDescriptor = usb_get_product_str_descriptor,
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.GetSerialStrDescriptor = usb_get_serial_str_descriptor,
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.GetConfigurationStrDescriptor = usb_get_configuration_str_descriptor,
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.GetInterfaceStrDescriptor = usb_get_interface_str_descriptor,
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.GetBOSDescriptor = usb_get_bos_descriptor,
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};
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/*
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* USB class (interface dispatch, configuration descriptor)
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*/
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static uint8_t usb_class_init(USBD_HandleTypeDef *dev, uint8_t cfg_idx) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_HID:
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usb_hid_class_init(dev, &usb_ifaces[i].hid, cfg_idx);
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break;
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case USB_IFACE_TYPE_VCP:
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usb_vcp_class_init(dev, &usb_ifaces[i].vcp, cfg_idx);
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break;
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case USB_IFACE_TYPE_WEBUSB:
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usb_webusb_class_init(dev, &usb_ifaces[i].webusb, cfg_idx);
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break;
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default:
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break;
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}
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}
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return USBD_OK;
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}
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static uint8_t usb_class_deinit(USBD_HandleTypeDef *dev, uint8_t cfg_idx) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_HID:
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usb_hid_class_deinit(dev, &usb_ifaces[i].hid, cfg_idx);
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break;
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case USB_IFACE_TYPE_VCP:
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usb_vcp_class_deinit(dev, &usb_ifaces[i].vcp, cfg_idx);
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break;
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case USB_IFACE_TYPE_WEBUSB:
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usb_webusb_class_deinit(dev, &usb_ifaces[i].webusb, cfg_idx);
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break;
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default:
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break;
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}
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}
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return USBD_OK;
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}
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#define USB_WEBUSB_REQ_GET_URL 0x02
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#define USB_WEBUSB_DESCRIPTOR_TYPE_URL 0x03
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#define USB_WEBUSB_URL_SCHEME_HTTP 0
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#define USB_WEBUSB_URL_SCHEME_HTTPS 1
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static uint8_t usb_class_setup(USBD_HandleTypeDef *dev,
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USBD_SetupReqTypedef *req) {
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if (((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_CLASS) &&
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((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_STANDARD) &&
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((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_VENDOR)) {
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return USBD_OK;
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}
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if ((req->bmRequest & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_VENDOR) {
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if ((req->bmRequest & USB_REQ_RECIPIENT_MASK) == USB_REQ_RECIPIENT_DEVICE) {
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if (sectrue == usb21_enabled && req->bRequest == USB_WEBUSB_VENDOR_CODE) {
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if (req->wIndex == USB_WEBUSB_REQ_GET_URL &&
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req->wValue == USB_WEBUSB_LANDING_PAGE) {
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static const char webusb_url[] = {
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3 + 15, // uint8_t bLength
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USB_WEBUSB_DESCRIPTOR_TYPE_URL, // uint8_t bDescriptorType
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USB_WEBUSB_URL_SCHEME_HTTPS, // uint8_t bScheme
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't',
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'r',
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'e',
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'z',
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'o',
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'r',
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'.',
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'i',
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'o',
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'/',
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's',
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't',
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'a',
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'r',
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't', // char URL[]
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};
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wait_random();
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USBD_CtlSendData(dev, UNCONST(webusb_url),
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MIN_8bits(req->wLength, sizeof(webusb_url)));
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return USBD_OK;
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} else {
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wait_random();
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USBD_CtlError(dev, req);
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return USBD_FAIL;
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}
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} else if (sectrue == usb21_enabled &&
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req->bRequest == USB_WINUSB_VENDOR_CODE) {
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if (req->wIndex ==
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USB_WINUSB_REQ_GET_COMPATIBLE_ID_FEATURE_DESCRIPTOR) {
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static const uint8_t winusb_wcid[] = {
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// header
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0x28, 0x00, 0x00, 0x00, // dwLength
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0x00, 0x01, // bcdVersion
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0x04, 0x00, // wIndex
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0x01, // bNumSections
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved
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// functions
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0x00, // bInterfaceNumber - HACK: we present only interface 0 as
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// WinUSB
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0x01, // reserved
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'W', 'I', 'N', 'U', 'S', 'B', 0x00, 0x00, // compatibleId
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, // subCompatibleId
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved
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};
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wait_random();
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USBD_CtlSendData(dev, UNCONST(winusb_wcid),
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MIN_8bits(req->wLength, sizeof(winusb_wcid)));
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return USBD_OK;
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} else {
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wait_random();
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USBD_CtlError(dev, req);
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return USBD_FAIL;
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}
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}
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}
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if ((req->bmRequest & USB_REQ_RECIPIENT_MASK) ==
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USB_REQ_RECIPIENT_INTERFACE) {
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if (sectrue == usb21_enabled && req->bRequest == USB_WINUSB_VENDOR_CODE) {
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if (req->wIndex ==
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USB_WINUSB_REQ_GET_EXTENDED_PROPERTIES_OS_FEATURE_DESCRIPTOR &&
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(req->wValue & 0xFF) == 0) { // reply only if interface is 0
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static const uint8_t winusb_guid[] = {
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// header
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0x92, 0x00, 0x00, 0x00, // dwLength
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0x00, 0x01, // bcdVersion
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0x05, 0x00, // wIndex
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0x01, 0x00, // wNumFeatures
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// features
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0x88, 0x00, 0x00, 0x00, // dwLength
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0x07, 0x00, 0x00, 0x00, // dwPropertyDataType
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0x2A, 0x00, // wNameLength
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'D', 0x00, 'e', 0x00, 'v', 0x00, 'i', 0x00, 'c', 0x00, 'e', 0x00,
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'I', 0x00, 'n', 0x00, 't', 0x00, 'e', 0x00, 'r', 0x00, 'f', 0x00,
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'a', 0x00, 'c', 0x00, 'e', 0x00, 'G', 0x00, 'U', 0x00, 'I', 0x00,
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'D', 0x00, 's', 0x00, 0x00, 0x00, // .name
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0x50, 0x00, 0x00, 0x00, // dwPropertyDataLength
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'{', 0x00, 'c', 0x00, '6', 0x00, 'c', 0x00, '3', 0x00, '7', 0x00,
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'4', 0x00, 'a', 0x00, '6', 0x00, '-', 0x00, '2', 0x00, '2', 0x00,
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'8', 0x00, '5', 0x00, '-', 0x00, '4', 0x00, 'c', 0x00, 'b', 0x00,
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|
'8', 0x00, '-', 0x00, 'a', 0x00, 'b', 0x00, '4', 0x00, '3', 0x00,
|
|
'-', 0x00, '1', 0x00, '7', 0x00, '6', 0x00, '4', 0x00, '7', 0x00,
|
|
'c', 0x00, 'e', 0x00, 'a', 0x00, '5', 0x00, '0', 0x00, '3', 0x00,
|
|
'd', 0x00, '}', 0x00, 0x00, 0x00, 0x00, 0x00, // propertyData
|
|
};
|
|
wait_random();
|
|
USBD_CtlSendData(dev, UNCONST(winusb_guid),
|
|
MIN_8bits(req->wLength, sizeof(winusb_guid)));
|
|
return USBD_OK;
|
|
} else {
|
|
wait_random();
|
|
USBD_CtlError(dev, req);
|
|
return USBD_FAIL;
|
|
}
|
|
}
|
|
}
|
|
} else if ((req->bmRequest & USB_REQ_RECIPIENT_MASK) ==
|
|
USB_REQ_RECIPIENT_INTERFACE) {
|
|
if (req->wIndex >= USBD_MAX_NUM_INTERFACES) {
|
|
wait_random();
|
|
USBD_CtlError(dev, req);
|
|
return USBD_FAIL;
|
|
}
|
|
switch (usb_ifaces[req->wIndex].type) {
|
|
case USB_IFACE_TYPE_HID:
|
|
wait_random();
|
|
return usb_hid_class_setup(dev, &usb_ifaces[req->wIndex].hid, req);
|
|
case USB_IFACE_TYPE_VCP:
|
|
wait_random();
|
|
return usb_vcp_class_setup(dev, &usb_ifaces[req->wIndex].vcp, req);
|
|
case USB_IFACE_TYPE_WEBUSB:
|
|
wait_random();
|
|
return usb_webusb_class_setup(dev, &usb_ifaces[req->wIndex].webusb,
|
|
req);
|
|
default:
|
|
wait_random();
|
|
USBD_CtlError(dev, req);
|
|
return USBD_FAIL;
|
|
}
|
|
}
|
|
return USBD_OK;
|
|
}
|
|
|
|
static uint8_t usb_class_data_in(USBD_HandleTypeDef *dev, uint8_t ep_num) {
|
|
#ifdef RDI
|
|
rdi_refresh_session_delay();
|
|
#endif
|
|
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
|
|
switch (usb_ifaces[i].type) {
|
|
case USB_IFACE_TYPE_HID:
|
|
wait_random();
|
|
usb_hid_class_data_in(dev, &usb_ifaces[i].hid, ep_num);
|
|
break;
|
|
case USB_IFACE_TYPE_VCP:
|
|
wait_random();
|
|
usb_vcp_class_data_in(dev, &usb_ifaces[i].vcp, ep_num);
|
|
break;
|
|
case USB_IFACE_TYPE_WEBUSB:
|
|
wait_random();
|
|
usb_webusb_class_data_in(dev, &usb_ifaces[i].webusb, ep_num);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return USBD_OK;
|
|
}
|
|
|
|
static uint8_t usb_class_data_out(USBD_HandleTypeDef *dev, uint8_t ep_num) {
|
|
#ifdef RDI
|
|
rdi_refresh_session_delay();
|
|
#endif
|
|
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
|
|
switch (usb_ifaces[i].type) {
|
|
case USB_IFACE_TYPE_HID:
|
|
wait_random();
|
|
usb_hid_class_data_out(dev, &usb_ifaces[i].hid, ep_num);
|
|
break;
|
|
case USB_IFACE_TYPE_VCP:
|
|
wait_random();
|
|
usb_vcp_class_data_out(dev, &usb_ifaces[i].vcp, ep_num);
|
|
break;
|
|
case USB_IFACE_TYPE_WEBUSB:
|
|
wait_random();
|
|
usb_webusb_class_data_out(dev, &usb_ifaces[i].webusb, ep_num);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return USBD_OK;
|
|
}
|
|
|
|
static uint8_t usb_class_sof(USBD_HandleTypeDef *dev) {
|
|
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
|
|
switch (usb_ifaces[i].type) {
|
|
case USB_IFACE_TYPE_VCP:
|
|
wait_random();
|
|
usb_vcp_class_sof(dev, &usb_ifaces[i].vcp);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return USBD_OK;
|
|
}
|
|
|
|
static uint8_t *usb_class_get_cfg_desc(uint16_t *length) {
|
|
*length = usb_config_desc->wTotalLength;
|
|
return usb_config_buf;
|
|
}
|
|
|
|
static uint8_t *usb_class_get_usrstr_desc(USBD_HandleTypeDef *dev,
|
|
uint8_t index, uint16_t *length) {
|
|
if (sectrue == usb21_enabled && index == USB_WINUSB_EXTRA_STRING_INDEX) {
|
|
static const uint8_t winusb_string_descriptor[] = {
|
|
0x12, // bLength
|
|
USB_DESC_TYPE_STRING, // bDescriptorType
|
|
USB_WINUSB_EXTRA_STRING // wData
|
|
};
|
|
*length = sizeof(winusb_string_descriptor);
|
|
return UNCONST(winusb_string_descriptor);
|
|
} else {
|
|
*length = 0;
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static const USBD_ClassTypeDef usb_class = {
|
|
.Init = usb_class_init,
|
|
.DeInit = usb_class_deinit,
|
|
.Setup = usb_class_setup,
|
|
.EP0_TxSent = NULL,
|
|
.EP0_RxReady = NULL,
|
|
.DataIn = usb_class_data_in,
|
|
.DataOut = usb_class_data_out,
|
|
.SOF = usb_class_sof,
|
|
.IsoINIncomplete = NULL,
|
|
.IsoOUTIncomplete = NULL,
|
|
.GetHSConfigDescriptor = usb_class_get_cfg_desc,
|
|
.GetFSConfigDescriptor = usb_class_get_cfg_desc,
|
|
.GetOtherSpeedConfigDescriptor = usb_class_get_cfg_desc,
|
|
.GetDeviceQualifierDescriptor = NULL,
|
|
.GetUsrStrDescriptor = usb_class_get_usrstr_desc,
|
|
};
|