77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/* usb_helper - Low-Level USB routines for SimTrace
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*
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* (C) 2006-2010 by Harald Welte <hwelte@hmw-consulting.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <time.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <usb.h>
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static struct usb_device *find_usb_device (uint16_t vendor_id, uint16_t product_id)
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{
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struct usb_bus *bus;
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for (bus = usb_busses; bus; bus = bus->next) {
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struct usb_device *dev;
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for (dev = bus->devices; dev; dev = dev->next) {
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if (dev->descriptor.idVendor == vendor_id &&
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dev->descriptor.idProduct == product_id)
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return dev;
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}
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}
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return NULL;
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}
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struct usb_dev_handle *usb_find_open(uint16_t vendor_id, uint16_t product_id)
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{
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struct usb_device *dev;
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struct usb_dev_handle *hdl;
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usb_init();
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usb_find_busses();
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usb_find_devices();
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dev = find_usb_device(vendor_id, product_id);
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if (!dev) {
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fprintf(stderr, "Cannot find matching USB Device. "
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"Are you sure it is connected?\n");
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exit(1);
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}
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hdl = usb_open(dev);
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if (!hdl) {
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fprintf(stderr, "Unable to open usb device: %s\n",
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usb_strerror());
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exit(1);
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}
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if (usb_claim_interface(hdl, 0) < 0) {
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fprintf(stderr, "Unable to claim usb interface "
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"1 of device: %s\n", usb_strerror());
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exit(1);
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}
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return hdl;
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}
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