/*
 * This program reads a CP2102 EEPROM image from an Intel HEX file
 * and writes it into a physical CP2102 USB device.
 */

#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"
#include "../libuwrap/open_close.h"
#include "cp210x_defs.h"

u_char eeprom[SIZE_EEPROM];
char *device_selector, *input_filename;
int no_detach;

process_cmdline(argc, argv)
	char **argv;
{
	int c;
	extern int optind;
	extern char *optarg;

	while ((c = getopt(argc, argv, "n")) != EOF) {
		switch (c) {
		case 'n':
			no_detach = 1;
			continue;
		default:
			/* error msg already printed */
			exit(1);
		}
	}
	if (argc != optind + 2) {
		fprintf(stderr,
			"usage: %s [options] device-selector eeprom-image\n",
			argv[0]);
		exit(1);
	}
	device_selector = argv[optind];
	input_filename = argv[optind + 1];
}

main(argc, argv)
	char **argv;
{
	struct usb_device *dev;
	usb_dev_handle *usbh;

	process_cmdline(argc, argv);
	read_intel_hex(input_filename);
	dev = find_usbdev_by_desc_string(device_selector);
	if (!dev) {
		fprintf(stderr, "error: specified USB device not found\n");
		exit(1);
	}
	usbh = usb_open(dev);
	if (!usbh) {
		fprintf(stderr, "error: usb_open() failed\n");
		exit(1);
	}
	if (!no_detach)
		usbwrap_claim_all_ifs(usbh);
	write_eeprom(usbh);
	usb_close(usbh);
	exit(0);
}