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Code Issues Releases Wiki Activity

feat(core/unix): implement USB VCP emulation

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This commit is contained in:
tychovrahe 2025-05-16 20:29:26 +02:00 committed by TychoVrahe
parent c0c5003e08
commit 803baf7fcd
2 changed files with 59 additions and 2 deletions
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59
core/embed/io/usb/unix/usb.c
View File

@ -88,7 +88,8 @@ secbool usb_start(void) {
usb_iface_t *iface = &usb_ifaces[i];
// skip if not HID or WebUSB interface
if (iface->type != USB_IFACE_TYPE_HID &&
iface->type != USB_IFACE_TYPE_WEBUSB) {
iface->type != USB_IFACE_TYPE_WEBUSB &&
iface->type != USB_IFACE_TYPE_VCP) {
continue;
}
@ -328,6 +329,62 @@ int usb_webusb_write_blocking(uint8_t iface_num, const uint8_t *buf,
return usb_webusb_write(iface_num, buf, len);
}
secbool usb_vcp_can_read(uint8_t iface_num) {
if (iface_num >= USBD_MAX_NUM_INTERFACES ||
usb_ifaces[iface_num].type != USB_IFACE_TYPE_VCP) {
return secfalse;
}
return usb_emulated_poll_read(&usb_ifaces[iface_num]);
}
secbool usb_vcp_can_write(uint8_t iface_num) {
if (iface_num >= USBD_MAX_NUM_INTERFACES ||
usb_ifaces[iface_num].type != USB_IFACE_TYPE_VCP) {
return secfalse;
}
return usb_emulated_poll_write(&usb_ifaces[iface_num]);
}
int usb_vcp_read(uint8_t iface_num, uint8_t *buf, uint32_t len) {
if (iface_num >= USBD_MAX_NUM_INTERFACES ||
usb_ifaces[iface_num].type != USB_IFACE_TYPE_VCP) {
return 0;
}
return usb_emulated_read(&usb_ifaces[iface_num], buf, len);
}
int usb_vcp_read_blocking(uint8_t iface_num, uint8_t *buf, uint32_t len,
int timeout) {
const uint32_t start = clock();
while (sectrue != usb_vcp_can_read(iface_num)) {
if (timeout >= 0 &&
(1000 * (clock() - start)) / CLOCKS_PER_SEC >= timeout) {
return 0; // Timeout
}
}
return usb_vcp_read(iface_num, buf, len);
}
int usb_vcp_write(uint8_t iface_num, const uint8_t *buf, uint32_t len) {
if (iface_num >= USBD_MAX_NUM_INTERFACES ||
usb_ifaces[iface_num].type != USB_IFACE_TYPE_VCP) {
return 0;
}
return usb_emulated_write(&usb_ifaces[iface_num], buf, len);
}
int usb_vcp_write_blocking(uint8_t iface_num, const uint8_t *buf, uint32_t len,
int timeout) {
const uint32_t start = clock();
while (sectrue != usb_vcp_can_write(iface_num)) {
if (timeout >= 0 &&
(1000 * (clock() - start)) / CLOCKS_PER_SEC >= timeout) {
return 0; // Timeout
}
}
return usb_vcp_write(iface_num, buf, len);
}
void mp_hal_set_vcp_iface(int iface_num) {}
secbool usb_configured(void) {

2
core/src/usb.py
View File

@ -27,7 +27,7 @@ _iface_iter = iter(range(5))
ENABLE_IFACE_DEBUG = __debug__
ENABLE_IFACE_WEBAUTHN = not utils.BITCOIN_ONLY
ENABLE_IFACE_VCP = __debug__
ENABLE_IFACE_VCP = __debug__ and not utils.EMULATOR
# interface used for trezor wire protocol
id_wire = next(_iface_iter)