+static int ipaq_calc_num_ports(struct usb_serial *serial)
+{
+ /*
+ * some devices have 3 endpoints, the 3rd of which
+ * must be ignored as it would make the core
+ * create a second port which oopses when used
+ */
+ int ipaq_num_ports = 1;
+
+ dbg("%s - numberofendpoints: %d", __FUNCTION__,
+ (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
+
+ /*
+ * a few devices have 4 endpoints, seemingly Yakuma devices,
+ * and we need the second pair, so let them have 2 ports
+ *
+ * TODO: can we drop port 1 ?
+ */
+ if (serial->interface->cur_altsetting->desc.bNumEndpoints > 3) {
+ ipaq_num_ports = 2;
+ }
+
+ return ipaq_num_ports;
+}
+
+