/*
 * Programming of FT232R internal EEPROM requires a special magic sequence
 * of non-EEPROM-specific commands to be issued prior to actual EEPROM write
 * commands.  This module implements this magic command sequence.
 */

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <usb.h>
#include "ftdi_defs.h"
#include "ftdi_tune.h"
#include "eeprom_func.h"

void ft232r_eeprom_magic(usb_dev_handle *usbh)
{
	u_char buf[2];
	int rc;

	/* equivalent of ftdi_usb_reset() */
	rc = usb_control_msg(usbh, FTDI_DEVICE_OUT_REQTYPE, SIO_RESET_REQUEST,
			     SIO_RESET_SIO, 0, NULL, 0, USB_WRITE_TIMEOUT);
	if (rc != 0) {
		fprintf(stderr,
			"ftdi_usb_reset error: usb_control_msg() returned %d\n",
			rc);
		exit(1);
	}
	/* equivalent of ftdi_poll_modem_status() */
	rc = usb_control_msg(usbh, FTDI_DEVICE_IN_REQTYPE,
			     SIO_POLL_MODEM_STATUS_REQUEST, 0, 0, (char *) buf,
			     2, USB_READ_TIMEOUT);
	if (rc != 2) {
		fprintf(stderr,
		"ftdi_poll_modem_status error: usb_control_msg() returned %d\n",
			rc);
		exit(1);
	}
	/* equivalent of ftdi_set_latency_timer() */
	rc = usb_control_msg(usbh, FTDI_DEVICE_OUT_REQTYPE,
			     SIO_SET_LATENCY_TIMER_REQUEST, 0x77, 0, NULL, 0,
			     USB_WRITE_TIMEOUT);
	if (rc != 0) {
		fprintf(stderr,
		"ftdi_set_latency_timer error: usb_control_msg() returned %d\n",
			rc);
		exit(1);
	}
}