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/* usb_helper - Low-Level USB routines for SimTrace
*
* (C) 2006-2010 by Harald Welte <hwelte@hmw-consulting.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy 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 <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
#include <usb.h>
const char *
hexdump(const void *data, unsigned int len)
{
static char string[65535];
unsigned char *d = (unsigned char *) data;
unsigned int i, left, ofs;
string[0] = '\0';
ofs = snprintf(string, sizeof(string)-1, "(%u): ", len);
left = sizeof(string) - ofs;
for (i = 0; len--; i += 3) {
if (i >= sizeof(string) -4)
break;
snprintf(string+ofs+i, 4, " %02x", *d++);
}
string[sizeof(string)-1] = '\0';
return string;
}
static struct usb_device *find_usb_device (uint16_t vendor_id, uint16_t product_id)
{
struct usb_bus *bus;
for (bus = usb_busses; bus; bus = bus->next) {
struct usb_device *dev;
for (dev = bus->devices; dev; dev = dev->next) {
if (dev->descriptor.idVendor == vendor_id &&
dev->descriptor.idProduct == product_id)
return dev;
}
}
return NULL;
}
struct usb_dev_handle *usb_find_open(uint16_t vendor_id, uint16_t product_id)
{
struct usb_device *dev;
struct usb_dev_handle *hdl;
usb_init();
usb_find_busses();
usb_find_devices();
dev = find_usb_device(vendor_id, product_id);
if (!dev) {
fprintf(stderr, "Cannot find matching USB Device. "
"Are you sure it is connected?\n");
exit(1);
}
hdl = usb_open(dev);
if (!hdl) {
fprintf(stderr, "Unable to open usb device: %s\n",
usb_strerror());
exit(1);
}
if (usb_claim_interface(hdl, 0) < 0) {
fprintf(stderr, "Unable to claim usb interface "
"1 of device: %s\n", usb_strerror());
exit(1);
}
return hdl;
}
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