linux-libre-firmware/atusb/sernum.c

/*
 * fw/sernum.c - ATUSB serial number
 *
 * Written 2008-2011, 2013 by Werner Almesberger
 * Copyright 2008-2011, 2013 Werner Almesberger
 *
 * 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 2 of the License, or
 * (at your option) any later version.
 */


#include <stdbool.h>
#include <stdint.h>

#include "usb.h"

#include "board.h"
#include "sernum.h"


static const uint8_t string_descriptor_0[] = {
	4,				/* blength */
	USB_DT_STRING,			/* bDescriptorType */
	LE(USB_LANGID_ENGLISH_US)	/* wLANGID[0]  */
};


bool sernum_get_descr(uint8_t type, uint8_t index, const uint8_t **reply,
    uint8_t *size)
{
	if (type != USB_DT_STRING)
		return 0;
	switch (index) {
	case 0:
		*reply = string_descriptor_0;
		*size = sizeof(string_descriptor_0);
		return 1;
	case 1:
		*reply = board_sernum;
		*size = sizeof(board_sernum);
		return 1;
	default:
		return 0;
	}
}