dm9000: during init reset phy only for dm9000b

Some of the changes introduced in commit 6741f40 (DM9000B: driver
initialization upgrade) break functionality on DM9000A
(error message during NFS boot: "dm9000 dm9000.0: eth0: link down")

Since the changes were meant to serve only DM9000B, make them
dependent on the chip type.

Cc: David S. Miller <davem@davemloft.net>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c
index 5f5896e522d2..912983b39492 100644
--- a/drivers/net/ethernet/davicom/dm9000.c
+++ b/drivers/net/ethernet/davicom/dm9000.c
@@ -891,8 +891,13 @@ dm9000_init_dm9000(struct net_device *dev)
 
         iow(db, DM9000_GPCR, GPCR_GEP_CNTL);    /* Let GPIO0 output */
 
-        dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
-        dm9000_phy_write(dev, 0, MII_DM_DSPCR, DSPCR_INIT_PARAM); /* Init */
+        /* If we are dealing with DM9000B, some extra steps are required: a
+         * manual phy reset, and setting init params.
+         */
+        if (db->type == TYPE_DM9000B) {
+                dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET);
+                dm9000_phy_write(dev, 0, MII_DM_DSPCR, DSPCR_INIT_PARAM);
+        }
 
         ncr = (db->flags & DM9000_PLATF_EXT_PHY) ? NCR_EXT_PHY : 0;