ax88796: add 93cx6 eeprom support

Hook up the 93cx6 eeprom code to the ax88796 driver and modify the ax88796
driver to read out the mac address from the eeprom.  We need this for the
ax88796 on certain SuperH boards.  The pin configuration used to connect
the eeprom to the ax88796 on these boards is the same as pointed out by the
ax88796 datasheet, so we can probably reuse this code for multiple
platforms in the future.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/eeprom_93cx6.h b/include/linux/eeprom_93cx6.h
index d774b7778c91..a55c873e8b66 100644
--- a/include/linux/eeprom_93cx6.h
+++ b/include/linux/eeprom_93cx6.h
@@ -21,13 +21,14 @@
 /*
         Module: eeprom_93cx6
         Abstract: EEPROM reader datastructures for 93cx6 chipsets.
-        Supported chipsets: 93c46 & 93c66.
+        Supported chipsets: 93c46, 93c56 and 93c66.
  */
 
 /*
  * EEPROM operation defines.
  */
 #define PCI_EEPROM_WIDTH_93C46  6
+#define PCI_EEPROM_WIDTH_93C56  8
 #define PCI_EEPROM_WIDTH_93C66  8
 #define PCI_EEPROM_WIDTH_OPCODE 3
 #define PCI_EEPROM_WRITE_OPCODE 0x05
diff --git a/include/net/ax88796.h b/include/net/ax88796.h
index ee786a043b3d..51329dae44e6 100644
--- a/include/net/ax88796.h
+++ b/include/net/ax88796.h
@@ -14,6 +14,7 @@
 
 #define AXFLG_HAS_EEPROM                (1<<0)
 #define AXFLG_MAC_FROMDEV               (1<<1)  /* device already has MAC */
+#define AXFLG_HAS_93CX6                 (1<<2)  /* use eeprom_93cx6 driver */
 
 struct ax_plat_data {
         unsigned int     flags;