rm fteeprom/test/fteeprom-prog-bad When the magic command sequence for FT232R was added to libftdi-based fteeprom-prog, a version without this magic sequence was preserved in fteeprom-prog-bad. However, the new minilib version of fteeprom-prog operates without this magic sequence by default (as appropriate for FT2232D, FT2232H etc) and needs to be run with -r option to invoke FT232R-specific mode with the necessary magic. Anyone who needs fteeprom-prog-bad for study or experimentation can find it in freecalypso-hwlab Hg repository where it was originally developed.

/*
 * libftdi-0.20 performs these preliminary steps just before it goes
 * looking for the device of interest via usb_get_busses() followed
 * by traversal of the returned tree - hence we do likewise.
 */

#include <stdio.h>
#include <stdlib.h>
#include <usb.h>
#include "prelim_init.h"

void libusb_prelim_init(void)
{
	usb_init();
	if (usb_find_busses() < 0) {
		fprintf(stderr, "error: usb_find_busses() failed\n");
		exit(1);
	}
	if (usb_find_devices() < 0) {
		fprintf(stderr, "error: usb_find_devices() failed\n");
		exit(1);
	}
}