mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-18 05:28:40 +00:00
273 lines
9.2 KiB
C
273 lines
9.2 KiB
C
/*
|
|
* This file is part of the TREZOR project, https://trezor.io/
|
|
*
|
|
* Copyright (c) SatoshiLabs
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#define USB_CLASS_WEBUSB 0xFF
|
|
|
|
/* usb_webusb_add adds and configures new USB WebUSB interface according to
|
|
* configuration options passed in `info`. */
|
|
secbool usb_webusb_add(const usb_webusb_info_t *info) {
|
|
|
|
usb_iface_t *iface = usb_get_iface(info->iface_num);
|
|
|
|
if (iface == NULL) {
|
|
return secfalse; // Invalid interface number
|
|
}
|
|
if (iface->type != USB_IFACE_TYPE_DISABLED) {
|
|
return secfalse; // Interface is already enabled
|
|
}
|
|
|
|
usb_webusb_descriptor_block_t *d = usb_desc_alloc_iface(sizeof(usb_webusb_descriptor_block_t));
|
|
|
|
if (d == NULL) {
|
|
return secfalse; // Not enough space in the configuration descriptor
|
|
}
|
|
|
|
if ((info->ep_in & USB_EP_DIR_MASK) != USB_EP_DIR_IN) {
|
|
return secfalse; // IN EP is invalid
|
|
}
|
|
if ((info->ep_out & USB_EP_DIR_MASK) != USB_EP_DIR_OUT) {
|
|
return secfalse; // OUT EP is invalid
|
|
}
|
|
if (info->rx_buffer == NULL) {
|
|
return secfalse;
|
|
}
|
|
|
|
// Interface descriptor
|
|
d->iface.bLength = sizeof(usb_interface_descriptor_t);
|
|
d->iface.bDescriptorType = USB_DESC_TYPE_INTERFACE;
|
|
d->iface.bInterfaceNumber = info->iface_num;
|
|
d->iface.bAlternateSetting = 0;
|
|
d->iface.bNumEndpoints = 2;
|
|
d->iface.bInterfaceClass = USB_CLASS_WEBUSB;
|
|
d->iface.bInterfaceSubClass = info->subclass;
|
|
d->iface.bInterfaceProtocol = info->protocol;
|
|
d->iface.iInterface = USBD_IDX_INTERFACE_STR;
|
|
|
|
// IN endpoint (sending)
|
|
d->ep_in.bLength = sizeof(usb_endpoint_descriptor_t);
|
|
d->ep_in.bDescriptorType = USB_DESC_TYPE_ENDPOINT;
|
|
d->ep_in.bEndpointAddress = info->ep_in;
|
|
d->ep_in.bmAttributes = USBD_EP_TYPE_INTR;
|
|
d->ep_in.wMaxPacketSize = info->max_packet_len;
|
|
d->ep_in.bInterval = info->polling_interval;
|
|
|
|
// OUT endpoint (receiving)
|
|
d->ep_out.bLength = sizeof(usb_endpoint_descriptor_t);
|
|
d->ep_out.bDescriptorType = USB_DESC_TYPE_ENDPOINT;
|
|
d->ep_out.bEndpointAddress = info->ep_out;
|
|
d->ep_out.bmAttributes = USBD_EP_TYPE_INTR;
|
|
d->ep_out.wMaxPacketSize = info->max_packet_len;
|
|
d->ep_out.bInterval = info->polling_interval;
|
|
|
|
// Config descriptor
|
|
usb_desc_add_iface(sizeof(usb_webusb_descriptor_block_t));
|
|
|
|
// Interface state
|
|
iface->type = USB_IFACE_TYPE_WEBUSB;
|
|
iface->webusb.desc_block = d;
|
|
iface->webusb.rx_buffer = info->rx_buffer;
|
|
iface->webusb.ep_in = info->ep_in;
|
|
iface->webusb.ep_out = info->ep_out;
|
|
iface->webusb.max_packet_len = info->max_packet_len;
|
|
iface->webusb.alt_setting = 0;
|
|
iface->webusb.last_read_len = 0;
|
|
iface->webusb.ep_in_is_idle = 1;
|
|
|
|
return sectrue;
|
|
}
|
|
|
|
secbool usb_webusb_can_read(uint8_t iface_num) {
|
|
usb_iface_t *iface = usb_get_iface(iface_num);
|
|
if (iface == NULL) {
|
|
return secfalse; // Invalid interface number
|
|
}
|
|
if (iface->type != USB_IFACE_TYPE_WEBUSB) {
|
|
return secfalse; // Invalid interface type
|
|
}
|
|
if (iface->webusb.last_read_len == 0) {
|
|
return secfalse; // Nothing in the receiving buffer
|
|
}
|
|
if (usb_dev_handle.dev_state != USBD_STATE_CONFIGURED) {
|
|
return secfalse; // Device is not configured
|
|
}
|
|
return sectrue;
|
|
}
|
|
|
|
secbool usb_webusb_can_write(uint8_t iface_num) {
|
|
usb_iface_t *iface = usb_get_iface(iface_num);
|
|
if (iface == NULL) {
|
|
return secfalse; // Invalid interface number
|
|
}
|
|
if (iface->type != USB_IFACE_TYPE_WEBUSB) {
|
|
return secfalse; // Invalid interface type
|
|
}
|
|
if (iface->webusb.ep_in_is_idle == 0) {
|
|
return secfalse; // Last transmission is not over yet
|
|
}
|
|
if (usb_dev_handle.dev_state != USBD_STATE_CONFIGURED) {
|
|
return secfalse; // Device is not configured
|
|
}
|
|
return sectrue;
|
|
}
|
|
|
|
int usb_webusb_read(uint8_t iface_num, uint8_t *buf, uint32_t len) {
|
|
usb_iface_t *iface = usb_get_iface(iface_num);
|
|
if (iface == NULL) {
|
|
return -1; // Invalid interface number
|
|
}
|
|
if (iface->type != USB_IFACE_TYPE_WEBUSB) {
|
|
return -2; // Invalid interface type
|
|
}
|
|
usb_webusb_state_t *state = &iface->webusb;
|
|
|
|
// Copy maximum possible amount of data and truncate the buffer length
|
|
if (len < state->last_read_len) {
|
|
return 0; // Not enough data in the read buffer
|
|
}
|
|
len = state->last_read_len;
|
|
state->last_read_len = 0;
|
|
memcpy(buf, state->rx_buffer, len);
|
|
|
|
// Clear NAK to indicate we are ready to read more data
|
|
usb_ep_clear_nak(&usb_dev_handle, state->ep_out);
|
|
|
|
return len;
|
|
}
|
|
|
|
int usb_webusb_write(uint8_t iface_num, const uint8_t *buf, uint32_t len) {
|
|
usb_iface_t *iface = usb_get_iface(iface_num);
|
|
if (iface == NULL) {
|
|
return -1; // Invalid interface number
|
|
}
|
|
if (iface->type != USB_IFACE_TYPE_WEBUSB) {
|
|
return -2; // Invalid interface type
|
|
}
|
|
usb_webusb_state_t *state = &iface->webusb;
|
|
|
|
state->ep_in_is_idle = 0;
|
|
USBD_LL_Transmit(&usb_dev_handle, state->ep_in, UNCONST(buf), (uint16_t)len);
|
|
|
|
return len;
|
|
}
|
|
|
|
int usb_webusb_read_select(uint32_t timeout) {
|
|
const uint32_t start = HAL_GetTick();
|
|
for (;;) {
|
|
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
|
|
if (sectrue == usb_webusb_can_read(i)) {
|
|
return i;
|
|
}
|
|
}
|
|
if (HAL_GetTick() - start >= timeout) {
|
|
break;
|
|
}
|
|
__WFI(); // Enter sleep mode, waiting for interrupt
|
|
}
|
|
return -1; // Timeout
|
|
}
|
|
|
|
int usb_webusb_read_blocking(uint8_t iface_num, uint8_t *buf, uint32_t len, int timeout) {
|
|
const uint32_t start = HAL_GetTick();
|
|
while (sectrue != usb_webusb_can_read(iface_num)) {
|
|
if (timeout >= 0 && HAL_GetTick() - start >= timeout) {
|
|
return 0; // Timeout
|
|
}
|
|
__WFI(); // Enter sleep mode, waiting for interrupt
|
|
}
|
|
return usb_webusb_read(iface_num, buf, len);
|
|
}
|
|
|
|
int usb_webusb_write_blocking(uint8_t iface_num, const uint8_t *buf, uint32_t len, int timeout) {
|
|
const uint32_t start = HAL_GetTick();
|
|
while (sectrue != usb_webusb_can_write(iface_num)) {
|
|
if (timeout >= 0 && HAL_GetTick() - start >= timeout) {
|
|
return 0; // Timeout
|
|
}
|
|
__WFI(); // Enter sleep mode, waiting for interrupt
|
|
}
|
|
return usb_webusb_write(iface_num, buf, len);
|
|
}
|
|
|
|
static void usb_webusb_class_init(USBD_HandleTypeDef *dev, usb_webusb_state_t *state, uint8_t cfg_idx) {
|
|
// Open endpoints
|
|
USBD_LL_OpenEP(dev, state->ep_in, USBD_EP_TYPE_INTR, state->max_packet_len);
|
|
USBD_LL_OpenEP(dev, state->ep_out, USBD_EP_TYPE_INTR, state->max_packet_len);
|
|
|
|
// Reset the state
|
|
state->alt_setting = 0;
|
|
state->last_read_len = 0;
|
|
state->ep_in_is_idle = 1;
|
|
|
|
// Prepare the OUT EP to receive next packet
|
|
USBD_LL_PrepareReceive(dev, state->ep_out, state->rx_buffer, state->max_packet_len);
|
|
}
|
|
|
|
static void usb_webusb_class_deinit(USBD_HandleTypeDef *dev, usb_webusb_state_t *state, uint8_t cfg_idx) {
|
|
// Flush endpoints
|
|
USBD_LL_FlushEP(dev, state->ep_in);
|
|
USBD_LL_FlushEP(dev, state->ep_out);
|
|
// Close endpoints
|
|
USBD_LL_CloseEP(dev, state->ep_in);
|
|
USBD_LL_CloseEP(dev, state->ep_out);
|
|
}
|
|
|
|
static int usb_webusb_class_setup(USBD_HandleTypeDef *dev, usb_webusb_state_t *state, USBD_SetupReqTypedef *req) {
|
|
|
|
if ((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_STANDARD) {
|
|
return USBD_OK;
|
|
}
|
|
|
|
switch (req->bRequest) {
|
|
|
|
case USB_REQ_SET_INTERFACE:
|
|
state->alt_setting = req->wValue;
|
|
USBD_CtlSendStatus(dev);
|
|
return USBD_OK;
|
|
|
|
case USB_REQ_GET_INTERFACE:
|
|
USBD_CtlSendData(dev, &state->alt_setting, sizeof(state->alt_setting));
|
|
return USBD_OK;
|
|
|
|
default:
|
|
USBD_CtlError(dev, req);
|
|
return USBD_FAIL;
|
|
}
|
|
}
|
|
|
|
static void usb_webusb_class_data_in(USBD_HandleTypeDef *dev, usb_webusb_state_t *state, uint8_t ep_num) {
|
|
if ((ep_num | USB_EP_DIR_IN) == state->ep_in) {
|
|
state->ep_in_is_idle = 1;
|
|
}
|
|
}
|
|
|
|
static void usb_webusb_class_data_out(USBD_HandleTypeDef *dev, usb_webusb_state_t *state, uint8_t ep_num) {
|
|
if (ep_num == state->ep_out) {
|
|
state->last_read_len = USBD_LL_GetRxDataSize(dev, ep_num);
|
|
|
|
// Prepare the OUT EP to receive next packet
|
|
// User should provide state->rx_buffer that is big enough for state->max_packet_len bytes
|
|
USBD_LL_PrepareReceive(dev, ep_num, state->rx_buffer, state->max_packet_len);
|
|
|
|
if (state->last_read_len > 0) {
|
|
// Block the OUT EP until we process received data
|
|
usb_ep_set_nak(dev, ep_num);
|
|
}
|
|
}
|
|
}
|