firewire: Implement basic isochronous receive functionality.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-ohci.h b/drivers/firewire/fw-ohci.h
index a562305..fa15706 100644
--- a/drivers/firewire/fw-ohci.h
+++ b/drivers/firewire/fw-ohci.h
@@ -103,6 +103,7 @@
 #define OHCI1394_IsoXmitCommandPtr(n)            (0x20C + 16 * (n))
 
 /* Isochronous receive registers */
+#define OHCI1394_IsoRcvContextBase(n)         (0x400 + 32 * (n))
 #define OHCI1394_IsoRcvContextControlSet(n)   (0x400 + 32 * (n))
 #define OHCI1394_IsoRcvContextControlClear(n) (0x404 + 32 * (n))
 #define OHCI1394_IsoRcvCommandPtr(n)          (0x40C + 32 * (n))