/*
 * The function implemented in this module is common to all programs in
 * FC CP2102 tools suite that operate on physical hardware: it asks libuwrap
 * to locate either the default CP2102 VID:PID or a custom device selector
 * string.
 */

#include <sys/types.h>
#include <string.h>
#include <strings.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <usb.h>
#include "../libuwrap/find_dev.h"

static const struct usbdev_matchspec default_id = {0x10C4, 0xEA60};

struct usb_device *
find_cp2102_device(devsel_arg)
	char *devsel_arg;
{
	struct usb_device *dev;

	if (devsel_arg) {
		dev = find_usbdev_by_desc_string(devsel_arg);
		if (!dev) {
			fprintf(stderr,
				"error: specified USB device not found\n");
			exit(1);
		}
	} else {
		dev = find_usbdev_by_matchspec(&default_id);
		if (!dev) {
			fprintf(stderr,
				"error: no default-ID CP2102 device found\n");
			exit(1);
		}
	}
	return dev;
}