/*   * TUSB2136/3210 - support routines for bootcode * See http://www-s.ti.com/sc/psheets/sllu025a/sllu025a.pdf * * Copyright (C) 2001 Jim Paris <jim@jtan.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License, as published by the Free Software Foundation.  This * program is distributed WITHOUT ANY WARRANTY; without even the * implied warranty of merchantability or fitness for a particular * purpose.  You should have received a copy of version 2 of the GNU * General Public License along with this program; if not, write to * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */#include <stdio.h>#include <stdlib.h>#include <sys/stat.h>#include <usb.h>#include "tusb.h"#define die(x) do { perror(x); return 1; } while(0)usb_dev_handle *tusb = NULL;void close_tusb(void) {  if(tusb!=NULL)    usb_close(tusb);}int tusb_init(void) {  struct usb_bus *bus;  struct usb_device *dev;  struct usb_device *tusb_dev = NULL;  usb_init();  if(usb_find_busses())    die("Bus scan");  if(usb_find_devices())    die("Device scan");  for (bus = usb_busses; bus; bus = bus->next) {    for (dev = bus->devices; dev; dev = dev->next) {      if(dev->descriptor.idVendor==0x0451 &&       /* TI */	 dev->descriptor.idProduct==0x2136) {      /* TUSB2316/3210 */	if(tusb_dev!=NULL) {	  /* More than one, but there's no way of knowing which one to	     program, so give up */	  fprintf(stderr,"Multiple TUSB2316/3210s found, bailing out.\n");	  return 1;	}	tusb_dev=dev;      }    }  }  if(tusb_dev==NULL) {    fprintf(stderr,"TUSB2316/3210 not found.\n");    return 1;  }  if((tusb=usb_open(tusb_dev))==NULL) {    fprintf(stderr,"Error opening USB device.\n");    return 1;  }  atexit(close_tusb);  /* Setting the configuration and interface isn't really necessary      since there are only one of each in the boot ROM, but it's a good     way to make sure we can send data to the device. */  if(usb_set_configuration(tusb, 1)) {    perror("Can't set configuration");    fprintf(stderr,"(make sure you have write access to the device)\n");    return 1;  }  if(usb_claim_interface(tusb, 0))    die("Can't claim interface");  return 0;}