[PATCH] defxx: Big-endian hosts support

 The PDQ DMA engine requires a different byte-swapping mode for big-endian
hosts; also the MAC address which is read from a register through PIO has
to be byte-swapped.  These changes have been verified with DEFPA-DC (PCI)
boards and a Broadcom BCM91250A (MIPS CPU based) host.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 12 insertions, 3 deletions

diff --git a/drivers/net/defxx.h b/drivers/net/defxx.h
index 8b1e9a11ca2..2ce8f97253e 100644
--- a/drivers/net/defxx.h
+++ b/drivers/net/defxx.h
@@ -25,6 +25,7 @@
  *                                                      macros to DEFXX.C.
  *              12-Sep-96       LVS             Removed packet request header pointers.
  *              04 Aug 2003     macro           Converted to the DMA API.
+ *              23 Oct 2006     macro           Big-endian host support.
  */
 
 #ifndef _DEFXX_H_
@@ -1344,7 +1345,7 @@ typedef struct
 
 /* Register definition structures are defined for both big and little endian systems */
 
-#ifndef  BIG_ENDIAN
+#ifndef __BIG_ENDIAN
 
 /* Little endian format of Type 1 Producer register */
 
@@ -1402,7 +1403,11 @@ typedef union
                 } index;
         } PI_TYPE_2_CONSUMER;
 
-#else
+/* Define swapping required by DMA transfers.  */
+#define PI_PDATA_A_INIT_M_BSWAP_INIT    \
+        (PI_PDATA_A_INIT_M_BSWAP_DATA)
+
+#else /* __BIG_ENDIAN */
 
 /* Big endian format of Type 1 Producer register */
 
@@ -1460,7 +1465,11 @@ typedef union
                 } index;
         } PI_TYPE_2_CONSUMER;
 
-#endif  /* #ifndef BIG_ENDIAN */
+/* Define swapping required by DMA transfers.  */
+#define PI_PDATA_A_INIT_M_BSWAP_INIT    \
+        (PI_PDATA_A_INIT_M_BSWAP_DATA | PI_PDATA_A_INIT_M_BSWAP_LITERAL)
+
+#endif /* __BIG_ENDIAN */
 
 /* Define EISA controller register offsets */