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   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Zachary T Welch <zw@superlucidity.net>          *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  16  ***************************************************************************/
  17
  18 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21 #include "usb_common.h"
  22
  23
  24 static bool jtag_usb_match(struct usb_device *dev,
  25                 const uint16_t vids[], const uint16_t pids[])
  26 {
  27         for (unsigned i = 0; vids[i] && pids[i]; i++) {
  28                 if (dev->descriptor.idVendor == vids[i] &&
  29                         dev->descriptor.idProduct == pids[i])
  30                         return true;
  31         }
  32         return false;
  33 }
  34
  35 int jtag_usb_open(const uint16_t vids[], const uint16_t pids[],
  36                 struct usb_dev_handle **out)
  37 {
  38         usb_find_busses();
  39         usb_find_devices();
  40
  41         struct usb_bus *busses = usb_get_busses();
  42         for (struct usb_bus *bus = busses; bus; bus = bus->next) {
  43                 for (struct usb_device *dev = bus->devices; dev; dev = dev->next) {
  44                         if (!jtag_usb_match(dev, vids, pids))
  45                                 continue;
  46
  47                         *out = usb_open(dev);
  48                         if (NULL == *out)
  49                                 return -errno;
  50                         return 0;
  51                 }
  52         }
  53         return -ENODEV;
  54 }