4 files changed, 59 insertions, 1 deletions

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 9ff1cf46eaee..45f6cf531566 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -240,6 +240,13 @@ config AX88796
           AX88796 driver, using platform bus to provide
           chip detection and resources
 
+config AX88796_93CX6
+        bool "ASIX AX88796 external 93CX6 eeprom support"
+        depends on AX88796
+        select EEPROM_93CX6
+        help
+          Select this if your platform comes with an external 93CX6 eeprom.
+
 config MACE
         tristate "MACE (Power Mac ethernet) support"
         depends on PPC_PMAC && PPC32
diff --git a/drivers/net/ax88796.c b/drivers/net/ax88796.c
index 90e0734e6037..9fe0517cf893 100644
--- a/drivers/net/ax88796.c
+++ b/drivers/net/ax88796.c
@@ -24,6 +24,7 @@
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
 #include <linux/mii.h>
+#include <linux/eeprom_93cx6.h>
 
 #include <net/ax88796.h>
 
@@ -582,6 +583,37 @@ static const struct ethtool_ops ax_ethtool_ops = {
         .get_link               = ax_get_link,
 };
 
+#ifdef CONFIG_AX88796_93CX6
+static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom)
+{
+        struct ei_device *ei_local = eeprom->data;
+        u8 reg = ei_inb(ei_local->mem + AX_MEMR);
+
+        eeprom->reg_data_in = reg & AX_MEMR_EEI;
+        eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */
+        eeprom->reg_data_clock = reg & AX_MEMR_EECLK;
+        eeprom->reg_chip_select = reg & AX_MEMR_EECS;
+}
+
+static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom)
+{
+        struct ei_device *ei_local = eeprom->data;
+        u8 reg = ei_inb(ei_local->mem + AX_MEMR);
+
+        reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS);
+
+        if (eeprom->reg_data_in)
+                reg |= AX_MEMR_EEI;
+        if (eeprom->reg_data_clock)
+                reg |= AX_MEMR_EECLK;
+        if (eeprom->reg_chip_select)
+                reg |= AX_MEMR_EECS;
+
+        ei_outb(reg, ei_local->mem + AX_MEMR);
+        udelay(10);
+}
+#endif
+
 /* setup code */
 
 static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local)
@@ -640,6 +672,23 @@ static int ax_init_dev(struct net_device *dev, int first_init)
                 memcpy(dev->dev_addr,  SA_prom, 6);
         }
 
+#ifdef CONFIG_AX88796_93CX6
+        if (first_init && ax->plat->flags & AXFLG_HAS_93CX6) {
+                unsigned char mac_addr[6];
+                struct eeprom_93cx6 eeprom;
+
+                eeprom.data = ei_local;
+                eeprom.register_read = ax_eeprom_register_read;
+                eeprom.register_write = ax_eeprom_register_write;
+                eeprom.width = PCI_EEPROM_WIDTH_93C56;
+
+                eeprom_93cx6_multiread(&eeprom, 0,
+                                       (__le16 __force *)mac_addr,
+                                       sizeof(mac_addr) >> 1);
+
+                memcpy(dev->dev_addr,  mac_addr, 6);
+        }
+#endif
         if (ax->plat->wordlength == 2) {
                 /* We must set the 8390 for word mode. */
                 ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG);
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;