diff --git a/Documentation/scsi/hptiop.txt b/Documentation/scsi/hptiop.txt
index d28a312..a6eb4ad 100644
--- a/Documentation/scsi/hptiop.txt
+++ b/Documentation/scsi/hptiop.txt
@@ -1,9 +1,9 @@
-HIGHPOINT ROCKETRAID 3xxx RAID DRIVER (hptiop)
+HIGHPOINT ROCKETRAID 3xxx/4xxx ADAPTER DRIVER (hptiop)
 
 Controller Register Map
 -------------------------
 
-The controller IOP is accessed via PCI BAR0.
+For Intel IOP based adapters, the controller IOP is accessed via PCI BAR0:
 
      BAR0 offset    Register
             0x10    Inbound Message Register 0
@@ -18,6 +18,24 @@
             0x40    Inbound Queue Port
             0x44    Outbound Queue Port
 
+For Marvell IOP based adapters, the IOP is accessed via PCI BAR0 and BAR1:
+
+     BAR0 offset    Register
+         0x20400    Inbound Doorbell Register
+         0x20404    Inbound Interrupt Mask Register
+         0x20408    Outbound Doorbell Register
+         0x2040C    Outbound Interrupt Mask Register
+
+     BAR1 offset    Register
+             0x0    Inbound Queue Head Pointer
+             0x4    Inbound Queue Tail Pointer
+             0x8    Outbound Queue Head Pointer
+             0xC    Outbound Queue Tail Pointer
+            0x10    Inbound Message Register
+            0x14    Outbound Message Register
+     0x40-0x1040    Inbound Queue
+   0x1040-0x2040    Outbound Queue
+
 
 I/O Request Workflow
 ----------------------
@@ -73,15 +91,9 @@
      driver-version        R     driver version string
      firmware-version      R     firmware version string
 
-The driver registers char device "hptiop" to communicate with HighPoint RAID
-management software. Its ioctl routine acts as a general binary interface 
-between the IOP firmware and HighPoint RAID management software. New management
-functions can be implemented in application/firmware without modification
-in driver code.
-
 
 -----------------------------------------------------------------------------
-Copyright (C) 2006 HighPoint Technologies, Inc. All Rights Reserved.
+Copyright (C) 2006-2007 HighPoint Technologies, Inc. All Rights Reserved.
 
   This file is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of