add simtrace2 host libraries
these are copies of files from simtrace2
diff --git a/src/simtrace2-discovery.c b/src/simtrace2-discovery.c
new file mode 100644
index 0000000..a7306ce
--- /dev/null
+++ b/src/simtrace2-discovery.c
@@ -0,0 +1,94 @@
+/* simtrace2-discovery - host PC library to scan for matching USB
+ * devices
+ *
+ * (C) 2016 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
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include <stdint.h>
+
+#include <libusb.h>
+
+/*! \brief obtain the endpoint addresses for a given USB interface */
+int get_usb_ep_addrs(libusb_device_handle *devh, unsigned int if_num,
+ uint8_t *out, uint8_t *in, uint8_t *irq)
+{
+ libusb_device *dev = libusb_get_device(devh);
+ struct libusb_config_descriptor *cdesc;
+ const struct libusb_interface_descriptor *idesc;
+ const struct libusb_interface *iface;
+ int rc, l;
+
+ rc = libusb_get_active_config_descriptor(dev, &cdesc);
+ if (rc < 0)
+ return rc;
+
+ iface = &cdesc->interface[if_num];
+ /* FIXME: we assume there's no altsetting */
+ idesc = &iface->altsetting[0];
+
+ for (l = 0; l < idesc->bNumEndpoints; l++) {
+ const struct libusb_endpoint_descriptor *edesc = &idesc->endpoint[l];
+ switch (edesc->bmAttributes & 3) {
+ case LIBUSB_TRANSFER_TYPE_BULK:
+ if (edesc->bEndpointAddress & 0x80) {
+ if (in)
+ *in = edesc->bEndpointAddress;
+ } else {
+ if (out)
+ *out = edesc->bEndpointAddress;
+ }
+ break;
+ case LIBUSB_TRANSFER_TYPE_INTERRUPT:
+ if (irq)
+ *irq = edesc->bEndpointAddress;
+ break;
+ default:
+ break;
+ }
+ }
+ return 0;
+}
+
+#if 0
+ struct libusb_device_descriptor ddesc;
+ int rc, i, j, k;
+
+ rc = libusb_get_device_descriptor(devh, &ddesc);
+ if (rc < 0)
+ return;
+
+ for (i = 0; i < ddesc.bNumConfigurations; i++) {
+ struct libusb_config_descriptor *cdesc;
+ rc = libusb_get_config_descriptor(devh, i, &cdesc);
+ if (rc < 0)
+ return;
+
+ for (j = 0; j < cdesc->bNumInterfaces; j++) {
+ const struct libusb_interface *iface = cdesc->interface[j];
+ for (k = 0; k < iface->num_altsetting; k++) {
+ const struct libusb_interface_descriptor *idesc = iface->altsetting[k];
+ /* make sure this is the interface we're looking for */
+ if (idesc->bInterfaceClass != 0xFF ||
+ idesc->bInterfaceSubClass != if_class ||
+ idsec->bInterfaceProtocol != if_proto)
+ continue;
+ /* FIXME */
+ }
+ }
+
+ libusb_free_config_descriptor(cdesc);
+ }
+#endif