Found in hex form in the kernel source.
--------------------------------------------------------------------------
+
+Driver: keyspan -- USB Keyspan USA-xxx serial device
+
+File: keyspan/mpr.fw
+File: keyspan/usa18x.fw
+File: keyspan/usa19.fw
+File: keyspan/usa19qi.fw
+File: keyspan/usa19qw.fw
+File: keyspan/usa19w.fw
+File: keyspan/usa28.fw
+File: keyspan/usa28xa.fw
+File: keyspan/usa28xb.fw
+File: keyspan/usa28x.fw
+File: keyspan/usa49w.fw
+File: keyspan/usa49wlc.fw
+
+Converted from Intel HEX files, used in our binary representation of ihex.
+
+Original licence information:
+
+ Copyright (C) 1999-2001
+ Keyspan, A division of InnoSys Incorporated ("Keyspan")
+
+ as an unpublished work. This notice does not imply unrestricted or
+ public access to the source code from which this firmware image is
+ derived. Except as noted below this firmware image may not be
+ reproduced, used, sold or transferred to any third party without
+ Keyspan's prior written consent. All Rights Reserved.
+
+ Permission is hereby granted for the distribution of this firmware
+ image as part of a Linux or other Open Source operating system kernel
+ in text or binary form as required.
+
+ This firmware may not be modified and may only be used with
+ Keyspan hardware. Distribution and/or Modification of the
+ keyspan.c driver which includes this firmware, in whole or in
+ part, requires the inclusion of this statement."
+
+--------------------------------------------------------------------------