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trezor-firmware/embed/trezorhal/usb.c
Pavol Rusnak 5e93cca0a9
WIP
2017-12-16 17:54:12 +01:00

331 lines
11 KiB
C
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/*
* Copyright (c) Jan Pochyla, SatoshiLabs
*
* Licensed under TREZOR License
* see LICENSE file for details
*/
#include STM32_HAL_H
#include "common.h"
#include "usb.h"
#include "usbd_core.h"
#define UNCONST(X) ((uint8_t *)(X))
#define USB_MAX_CONFIG_DESC_SIZE 256
#define USB_MAX_STR_SIZE 62
#define USB_MAX_STR_DESC_SIZE (USB_MAX_STR_SIZE * 2 + 2)
#if defined(USE_USB_FS)
#define USB_PHY_ID USB_PHY_FS_ID
#elif defined(USE_USB_HS) && defined(USE_USB_HS_IN_FS)
#define USB_PHY_ID USB_PHY_HS_ID
#else
#error Unable to determine proper USB_PHY_ID to use
#endif
static usb_device_descriptor_t usb_dev_desc;
// Config descriptor
static uint8_t usb_config_buf[USB_MAX_CONFIG_DESC_SIZE] __attribute__((aligned(4)));
static usb_config_descriptor_t *usb_config_desc = (usb_config_descriptor_t *)(usb_config_buf);
static usb_interface_descriptor_t *usb_next_iface_desc;
// String descriptor
static uint8_t usb_str_buf[USB_MAX_STR_DESC_SIZE] __attribute__((aligned(4)));
static usb_dev_string_table_t usb_str_table;
static usb_iface_t usb_ifaces[USBD_MAX_NUM_INTERFACES];
static USBD_HandleTypeDef usb_dev_handle;
static const USBD_DescriptorsTypeDef usb_descriptors;
static const USBD_ClassTypeDef usb_class;
static secbool __wur check_desc_str(const uint8_t *s) {
if (NULL == s) return secfalse;
if (strlen((const char *)s) > USB_MAX_STR_SIZE) return secfalse;
return sectrue;
}
void usb_init(const usb_dev_info_t *dev_info) {
// Device descriptor
usb_dev_desc.bLength = sizeof(usb_device_descriptor_t);
usb_dev_desc.bDescriptorType = USB_DESC_TYPE_DEVICE;
usb_dev_desc.bcdUSB = 0x0200;
usb_dev_desc.bDeviceClass = 0xef; // Composite Device Class
usb_dev_desc.bDeviceSubClass = 0x02; // Common Class
usb_dev_desc.bDeviceProtocol = 0x01; // Interface Association Descriptor
usb_dev_desc.bMaxPacketSize0 = USB_MAX_EP0_SIZE;
usb_dev_desc.idVendor = dev_info->vendor_id;
usb_dev_desc.idProduct = dev_info->product_id;
usb_dev_desc.bcdDevice = dev_info->release_num;
usb_dev_desc.iManufacturer = USBD_IDX_MFC_STR; // Index of manufacturer string
usb_dev_desc.iProduct = USBD_IDX_PRODUCT_STR; // Index of product string
usb_dev_desc.iSerialNumber = USBD_IDX_SERIAL_STR; // Index of serial number string
usb_dev_desc.bNumConfigurations = 1;
// String table
ensure(check_desc_str(dev_info->manufacturer), NULL);
ensure(check_desc_str(dev_info->product), NULL);
ensure(check_desc_str(dev_info->serial_number), NULL);
usb_str_table.manufacturer = dev_info->manufacturer;
usb_str_table.product = dev_info->product;
usb_str_table.serial_number = dev_info->serial_number;
// Configuration descriptor
usb_config_desc->bLength = sizeof(usb_config_descriptor_t);
usb_config_desc->bDescriptorType = USB_DESC_TYPE_CONFIGURATION;
usb_config_desc->wTotalLength = sizeof(usb_config_descriptor_t);
usb_config_desc->bNumInterfaces = 0;
usb_config_desc->bConfigurationValue = 0x01;
usb_config_desc->iConfiguration = 0;
usb_config_desc->bmAttributes = 0x80; // 0x80 = bus powered; 0xc0 = self powered
usb_config_desc->bMaxPower = 0xfa; // Maximum Power Consumption in 2mA units
// Pointer to interface descriptor data
usb_next_iface_desc = (usb_interface_descriptor_t *)(usb_config_buf + usb_config_desc->wTotalLength);
ensure(sectrue * (USBD_OK == USBD_Init(&usb_dev_handle, (USBD_DescriptorsTypeDef*)&usb_descriptors, USB_PHY_ID)), NULL);
ensure(sectrue * (USBD_OK == USBD_RegisterClass(&usb_dev_handle, (USBD_ClassTypeDef*)&usb_class)), NULL);
}
void usb_deinit(void) {
USBD_DeInit(&usb_dev_handle);
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
usb_ifaces[i].type = USB_IFACE_TYPE_DISABLED;
}
}
void usb_start(void) {
USBD_Start(&usb_dev_handle);
}
void usb_stop(void) {
USBD_Stop(&usb_dev_handle);
}
/*
* Utility functions for USB interfaces
*/
static usb_iface_t *usb_get_iface(uint8_t iface_num) {
if (iface_num < USBD_MAX_NUM_INTERFACES) {
return &usb_ifaces[iface_num];
} else {
return NULL; // Invalid interface number
}
}
static void *usb_desc_alloc_iface(size_t desc_len) {
if (usb_config_desc->wTotalLength + desc_len < USB_MAX_CONFIG_DESC_SIZE) {
return usb_next_iface_desc;
} else {
return NULL; // Not enough space in the descriptor
}
}
static void usb_desc_add_iface(size_t desc_len) {
usb_config_desc->bNumInterfaces++;
usb_config_desc->wTotalLength += desc_len;
usb_next_iface_desc = (usb_interface_descriptor_t *)(usb_config_buf + usb_config_desc->wTotalLength);
}
static uint8_t usb_ep_set_nak(USBD_HandleTypeDef *dev, uint8_t ep_num) {
PCD_HandleTypeDef *hpcd = dev->pData;
USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;
USBx_OUTEP(ep_num)->DOEPCTL |= USB_OTG_DOEPCTL_SNAK;
return USBD_OK;
}
static uint8_t usb_ep_clear_nak(USBD_HandleTypeDef *dev, uint8_t ep_num) {
PCD_HandleTypeDef *hpcd = dev->pData;
USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;
USBx_OUTEP(ep_num)->DOEPCTL |= USB_OTG_DOEPCTL_CNAK;
return USBD_OK;
}
/*
* USB interface implementations
*/
#include "usb_hid-impl.h"
#include "usb_vcp-impl.h"
/*
* USB configuration (device & string descriptors)
*/
static uint8_t *usb_get_dev_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
*length = sizeof(usb_dev_desc);
return (uint8_t *)(&usb_dev_desc);
}
static uint8_t *usb_get_langid_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
static const usb_langid_descriptor_t usb_langid_str_desc = {
.bLength = USB_LEN_LANGID_STR_DESC,
.bDescriptorType = USB_DESC_TYPE_STRING,
.wData = USB_LANGID_ENGLISH_US,
};
*length = sizeof(usb_langid_str_desc);
return (uint8_t *)(&usb_langid_str_desc);
}
static uint8_t *usb_get_manufacturer_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
USBD_GetString(UNCONST(usb_str_table.manufacturer), usb_str_buf, length);
return usb_str_buf;
}
static uint8_t *usb_get_product_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
USBD_GetString(UNCONST(usb_str_table.product), usb_str_buf, length);
return usb_str_buf;
}
static uint8_t *usb_get_serial_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
USBD_GetString(UNCONST(usb_str_table.serial_number), usb_str_buf, length);
return usb_str_buf;
}
static uint8_t *usb_get_config_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
USBD_GetString(UNCONST(""), usb_str_buf, length);
return usb_str_buf;
}
static uint8_t *usb_get_interface_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
USBD_GetString(UNCONST(""), usb_str_buf, length);
return usb_str_buf;
}
static const USBD_DescriptorsTypeDef usb_descriptors = {
.GetDeviceDescriptor = usb_get_dev_descriptor,
.GetLangIDStrDescriptor = usb_get_langid_str_descriptor,
.GetManufacturerStrDescriptor = usb_get_manufacturer_str_descriptor,
.GetProductStrDescriptor = usb_get_product_str_descriptor,
.GetSerialStrDescriptor = usb_get_serial_str_descriptor,
.GetConfigurationStrDescriptor = usb_get_config_str_descriptor,
.GetInterfaceStrDescriptor = usb_get_interface_str_descriptor,
};
/*
* USB class (interface dispatch, configuration descriptor)
*/
static uint8_t usb_class_init(USBD_HandleTypeDef *dev, uint8_t cfg_idx) {
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
switch (usb_ifaces[i].type) {
case USB_IFACE_TYPE_HID:
usb_hid_class_init(dev, &usb_ifaces[i].hid, cfg_idx);
break;
case USB_IFACE_TYPE_VCP:
usb_vcp_class_init(dev, &usb_ifaces[i].vcp, cfg_idx);
break;
default:
break;
}
}
return USBD_OK;
}
static uint8_t usb_class_deinit(USBD_HandleTypeDef *dev, uint8_t cfg_idx) {
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
switch (usb_ifaces[i].type) {
case USB_IFACE_TYPE_HID:
usb_hid_class_deinit(dev, &usb_ifaces[i].hid, cfg_idx);
break;
case USB_IFACE_TYPE_VCP:
usb_vcp_class_deinit(dev, &usb_ifaces[i].vcp, cfg_idx);
break;
default:
break;
}
}
return USBD_OK;
}
static uint8_t usb_class_setup(USBD_HandleTypeDef *dev, USBD_SetupReqTypedef *req) {
if (((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_CLASS) &&
((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_STANDARD)) {
return USBD_OK;
}
if (req->wIndex >= USBD_MAX_NUM_INTERFACES) {
return USBD_FAIL;
}
switch (usb_ifaces[req->wIndex].type) {
case USB_IFACE_TYPE_HID:
return usb_hid_class_setup(dev, &usb_ifaces[req->wIndex].hid, req);
case USB_IFACE_TYPE_VCP:
return usb_vcp_class_setup(dev, &usb_ifaces[req->wIndex].vcp, req);
default:
return USBD_FAIL;
}
}
static uint8_t usb_class_data_in(USBD_HandleTypeDef *dev, uint8_t ep_num) {
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
switch (usb_ifaces[i].type) {
case USB_IFACE_TYPE_HID:
usb_hid_class_data_in(dev, &usb_ifaces[i].hid, ep_num);
break;
case USB_IFACE_TYPE_VCP:
usb_vcp_class_data_in(dev, &usb_ifaces[i].vcp, ep_num);
break;
default:
break;
}
}
return USBD_OK;
}
static uint8_t usb_class_data_out(USBD_HandleTypeDef *dev, uint8_t ep_num) {
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
switch (usb_ifaces[i].type) {
case USB_IFACE_TYPE_HID:
usb_hid_class_data_out(dev, &usb_ifaces[i].hid, ep_num);
break;
case USB_IFACE_TYPE_VCP:
usb_vcp_class_data_out(dev, &usb_ifaces[i].vcp, 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:
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 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,
};
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