DM9000: Add ethtool support for reading and writing EEPROM

Add ethtool support to access the configuration EEPROM
connected to the DM9000.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/dm9000.c

@@ -186,7 +186,8 @@ static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg)
 static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
 			   int value);
 
-static void dm9000_read_eeprom(board_info_t *, int addr, unsigned char *to);
+static void dm9000_read_eeprom(board_info_t *, int addr, u8 *to);
+static void dm9000_write_eeprom(board_info_t *, int addr, u8 *dp);
 static void dm9000_rx(struct net_device *);
 static void dm9000_hash_table(struct net_device *);
 
@@ -409,12 +410,65 @@ static u32 dm9000_get_link(struct net_device *dev)
 	return mii_link_ok(&dm->mii);
 }
 
+#define DM_EEPROM_MAGIC		(0x444D394B)
+
+static int dm9000_get_eeprom_len(struct net_device *dev)
+{
+	return 128;
+}
+
+static int dm9000_get_eeprom(struct net_device *dev,
+			     struct ethtool_eeprom *ee, u8 *data)
+{
+	board_info_t *dm = to_dm9000_board(dev);
+	int offset = ee->offset;
+	int len = ee->len;
+	int i;
+
+	/* EEPROM access is aligned to two bytes */
+
+	if ((len & 1) != 0 || (offset & 1) != 0)
+		return -EINVAL;
+
+	ee->magic = DM_EEPROM_MAGIC;
+
+	for (i = 0; i < len; i += 2)
+		dm9000_read_eeprom(dm, (offset + i) / 2, data + i);
+
+	return 0;
+}
+
+static int dm9000_set_eeprom(struct net_device *dev,
+			     struct ethtool_eeprom *ee, u8 *data)
+{
+	board_info_t *dm = to_dm9000_board(dev);
+	int offset = ee->offset;
+	int len = ee->len;
+	int i;
+
+	/* EEPROM access is aligned to two bytes */
+
+	if ((len & 1) != 0 || (offset & 1) != 0)
+		return -EINVAL;
+
+	if (ee->magic != DM_EEPROM_MAGIC)
+		return -EINVAL;
+
+	for (i = 0; i < len; i += 2)
+		dm9000_write_eeprom(dm, (offset + i) / 2, data + i);
+
+	return 0;
+}
+
 static const struct ethtool_ops dm9000_ethtool_ops = {
 	.get_drvinfo		= dm9000_get_drvinfo,
 	.get_settings		= dm9000_get_settings,
 	.set_settings		= dm9000_set_settings,
 	.nway_reset		= dm9000_nway_reset,
 	.get_link		= dm9000_get_link,
+ 	.get_eeprom_len		= dm9000_get_eeprom_len,
+ 	.get_eeprom		= dm9000_get_eeprom,
+ 	.set_eeprom		= dm9000_set_eeprom,
 };
 
 
@@ -1008,7 +1062,7 @@ dm9000_rx(struct net_device *dev)
  *  Read a word data from EEPROM
  */
 static void
-dm9000_read_eeprom(board_info_t *db, int offset, unsigned char *to)
+dm9000_read_eeprom(board_info_t *db, int offset, u8 *to)
 {
 	mutex_lock(&db->addr_lock);
 
@@ -1024,18 +1078,17 @@ dm9000_read_eeprom(board_info_t *db, int offset, unsigned char *to)
 	mutex_unlock(&db->addr_lock);
 }
 
-#ifdef DM9000_PROGRAM_EEPROM
 /*
  * Write a word data to SROM
  */
 static void
-write_srom_word(board_info_t * db, int offset, u16 val)
+dm9000_write_eeprom(board_info_t *db, int offset, u8 *data)
 {
 	mutex_lock(&db->addr_lock);
 
 	iow(db, DM9000_EPAR, offset);
-	iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
-	iow(db, DM9000_EPDRL, (val & 0xff));
+	iow(db, DM9000_EPDRH, data[1]);
+	iow(db, DM9000_EPDRL, data[0]);
 	iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
 	mdelay(8);		/* same shit */
 	iow(db, DM9000_EPCR, 0);
@@ -1043,6 +1096,7 @@ write_srom_word(board_info_t * db, int offset, u16 val)
 	mutex_unlock(&db->addr_lock);
 }
 
+#ifdef DM9000_PROGRAM_EEPROM
 /*
  * Only for development:
  * Here we write static data to the eeprom in case