/*
 * This program locates a CP2102 device via libusb, reads its internal EEPROM,
 * applies user-requested patches to the EEPROM image, and then reprograms
 * the physical EEPROM with the patched version.
 */

#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"

extern struct usb_device *find_cp2102_device();

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

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

	while ((c = getopt(argc, argv, "b:d:n")) != EOF) {
		switch (c) {
		case 'b':
			baud_change = optarg;
			continue;
		case 'd':
			device_selector = optarg;
			continue;
		case 'n':
			no_detach = 1;
			continue;
		default:
		usage:
			fprintf(stderr,
				"usage: %s [hw-options] eeprom-changes\n",
				argv[0]);
			exit(1);
		}
	}
	if (argc == optind && !baud_change)
		goto usage;
}

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

	process_cmdline(argc, argv);
	dev = find_cp2102_device(device_selector);
	usbh = usb_open(dev);
	if (!usbh) {
		fprintf(stderr, "error: usb_open() failed\n");
		exit(1);
	}
	read_eeprom(usbh);
	if (baud_change)
		apply_eeprom_patch_baud(baud_change);
	for (; optind < argc; optind++)
		apply_eeprom_patch_file(argv[optind]);
	if (!no_detach)
		usbwrap_claim_all_ifs(usbh);
	write_eeprom(usbh);
	usb_close(usbh);
	exit(0);
}