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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>
This commit is contained in:
Marek Vasut 2012-09-23 16:58:49 +00:00 committed by David S. Miller
parent 2b018d57ff
commit 212ea99a85
2 changed files with 28 additions and 0 deletions
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27
drivers/net/phy/micrel.c
View File

@ -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;
@ -127,6 +140,19 @@ static struct phy_driver ksphy_driver[] = {
.ack_interrupt = kszphy_ack_interrupt,
.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,
@ -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 },
{ }

1
include/linux/micrel_phy.h
View File

@ -5,6 +5,7 @@
#define PHY_ID_KSZ9021 0x00221610
#define PHY_ID_KS8737 0x00221720
#define PHY_ID_KSZ8021 0x00221555
#define PHY_ID_KS8041 0x00221510
#define PHY_ID_KS8051 0x00221550
/* both for ks8001 Rev. A/B, and for ks8721 Rev 3. */