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firmware: Implement debug command via USB control vendor class

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Allows to collect talloc reports and other debug information
from a script while the remsim-client is still running.

Change-Id: I1f4d29335eb0d2feef376b8ecdfe57a0162914d6
This commit is contained in:
Alexander Couzens
2026-07-13 19:59:58 +02:00
parent bcc8241833
commit 4ac723a985
5 changed files with 171 additions and 0 deletions
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firmware/libcommon/source/mode_cardemu.c
+36
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@@ -689,6 +689,42 @@ void mode_cardemu_exit(void)
#endif
}
void mode_cardemu_ctrl_vendor_req(const USBGenericRequest *request)
{
if (USBGenericRequest_GetRecipient(request) != USBGenericRequest_DEVICE) {
USBD_Stall(0);
return;
}
if (USBGenericRequest_GetDirection(request) != USBGenericRequest_IN) {
USBD_Stall(0);
return;
}
uint16_t req = USBGenericRequest_GetRequest(request);
uint8_t buf[32] = {};
uint8_t len = 0;
unsigned int used, i;
switch (req) {
case SIMTRACER_VENDOR_REQ_GET_DEBUG_INFO:
/* don't use msgb here to prevent an additional allocation */
used = talloc_report_buf(&buf[0], 16);
/* add queues */
for (i = 0; i < ARRAY_SIZE(cardem_inst); i++) {
struct cardem_inst *ci = &cardem_inst[i];
buf[used++] = i + 1;
buf[used++] = usb_get_buf_ep(ci->ep_in)->queue_len;
buf[used++] = usb_get_buf_ep(ci->ep_out)->queue_len;
buf[used++] = usb_get_buf_ep(ci->ep_int)->queue_len;
}
USBD_Write(0, &buf, used, 0, 0);
break;
default:
USBD_Stall(0);
break;
}
}
/* handle a single USB command as received from the USB host */
static void dispatch_usb_command_generic(struct msgb *msg, struct cardem_inst *ci)
{