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authorMarek Vasut <marex@denx.de>2012-09-23 16:58:49 +0000
committerDavid S. Miller <davem@davemloft.net>2012-09-24 15:54:32 -0400
commit212ea99a85d30dbc834888384c57ad5abbc67a0a (patch)
tree565c35bd99f9b7a5b3d4fecece05c0a1201261ba /drivers
parent2b018d57ff18e5405823e5cb59651a5b4d946d7b (diff)
phy/micrel: Implement support for KSZ8021
The KSZ8021 PHY was previously caught by KS8051, which is not correct. This PHY needs additional setup if it is strapped for address 0. In such case an reserved bit must be written in the 0x16, "Operation Mode Strap Override" register. According to the KS8051 datasheet, that bit means "PHY Address 0 in non-broadcast" and it indeed behaves as such on KSZ8021. The issue where the ethernet controller (Freescale FEC) did not communicate with network is fixed by writing this bit as 1. Signed-off-by: Marek Vasut <marex@denx.de> Cc: David J. Choi <david.choi@micrel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/phy/micrel.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index cf287e0eb40..e8e00dc087f 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -21,6 +21,12 @@
#include <linux/phy.h>
#include <linux/micrel_phy.h>
+/* Operation Mode Strap Override */
+#define MII_KSZPHY_OMSO 0x16
+#define KSZPHY_OMSO_B_CAST_OFF (1 << 9)
+#define KSZPHY_OMSO_RMII_OVERRIDE (1 << 1)
+#define KSZPHY_OMSO_MII_OVERRIDE (1 << 0)
+
/* general Interrupt control/status reg in vendor specific block. */
#define MII_KSZPHY_INTCS 0x1B
#define KSZPHY_INTCS_JABBER (1 << 15)
@@ -101,6 +107,13 @@ static int kszphy_config_init(struct phy_device *phydev)
return 0;
}
+static int ksz8021_config_init(struct phy_device *phydev)
+{
+ const u16 val = KSZPHY_OMSO_B_CAST_OFF | KSZPHY_OMSO_RMII_OVERRIDE;
+ phy_write(phydev, MII_KSZPHY_OMSO, val);
+ return 0;
+}
+
static int ks8051_config_init(struct phy_device *phydev)
{
int regval;
@@ -128,6 +141,19 @@ static struct phy_driver ksphy_driver[] = {
.config_intr = ks8737_config_intr,
.driver = { .owner = THIS_MODULE,},
}, {
+ .phy_id = PHY_ID_KSZ8021,
+ .phy_id_mask = 0x00ffffff,
+ .name = "Micrel KSZ8021",
+ .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause |
+ SUPPORTED_Asym_Pause),
+ .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
+ .config_init = ksz8021_config_init,
+ .config_aneg = genphy_config_aneg,
+ .read_status = genphy_read_status,
+ .ack_interrupt = kszphy_ack_interrupt,
+ .config_intr = kszphy_config_intr,
+ .driver = { .owner = THIS_MODULE,},
+}, {
.phy_id = PHY_ID_KS8041,
.phy_id_mask = 0x00fffff0,
.name = "Micrel KS8041",
@@ -203,6 +229,7 @@ static struct mdio_device_id __maybe_unused micrel_tbl[] = {
{ PHY_ID_KSZ9021, 0x000ffffe },
{ PHY_ID_KS8001, 0x00ffffff },
{ PHY_ID_KS8737, 0x00fffff0 },
+ { PHY_ID_KSZ8021, 0x00ffffff },
{ PHY_ID_KS8041, 0x00fffff0 },
{ PHY_ID_KS8051, 0x00fffff0 },
{ }