usbconn: add interface option to usage

git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@1906 b68d4a1b-bc3d-0410-92ed-d4ac073336b7

urjtag/ChangeLog

@@ -3,6 +3,9 @@
   * src/tap/usbconn/libftdi.c (usbconn_ftdi_common_open): Use the new interface
     option and call ftdi_set_interface with it.  Patch by Michael Walle.
 
+  * src/tap/cable/generic_usbconn.h: Add new "interface" option to usage.
+    Patch by Michael Walle.
+
 2011-04-30  Mike Frysinger  <vapier@gentoo.org>
 
   * configure.ac: Force recent versions of autotools (at least ones released

urjtag/src/tap/cable/generic_usbconn.h

@@ -43,11 +43,12 @@ void urj_tap_cable_generic_usbconn_help (urj_log_level_t ll, const char *cablena
 void urj_tap_cable_generic_usbconn_help_ex (urj_log_level_t ll, const char *cablename,
                                             const char *ex_short, const char *ex_desc);
 #define URJ_TAP_CABLE_GENERIC_USBCONN_HELP_SHORT \
-    "[vid=VID] [pid=PID] [desc=DESC]"
+    "[vid=VID] [pid=PID] [desc=DESC] [interface=INTERFACE]"
 #define URJ_TAP_CABLE_GENERIC_USBCONN_HELP_DESC \
     "VID        USB Device Vendor ID (hex, e.g. 0abc)\n" \
     "PID        USB Device Product ID (hex, e.g. 0abc)\n" \
-    "DESC       Some string to match in description or serial no.\n"
+    "DESC       Some string to match in description or serial no.\n" \
+    "INTERFACE  Interface to use (0=first, 1=second, etc).\n"
 
 #define URJ_DECLARE_USBCONN_CABLE(vid, pid, driver, name, cable) \
 const urj_usbconn_cable_t urj_tap_cable_usbconn_##cable = { name, NULL, driver, vid, pid };