Marvell PHY m88e1111 driver fix

Marvell PHY m88e1111 (not sure about other models, but think they too)
works in two modes: fiber and copper. In Marvell PHY driver (that we
have in current community kernels) code supported only copper mode,
and this is not configurable, bits for copper mode are simply written
in registers during PHY initialization.

This patch adds support for both modes.

Signed-off-by: Alexandr Smirnov <asmirnov@ru.mvista.com>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 124 insertions, 5 deletions

diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index f0574073a2a3..b5f4c28f6b79 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -58,9 +58,25 @@
 #define MII_M1111_RX_DELAY              0x80
 #define MII_M1111_TX_DELAY              0x2
 #define MII_M1111_PHY_EXT_SR            0x1b
-#define MII_M1111_HWCFG_MODE_MASK       0xf
-#define MII_M1111_HWCFG_MODE_RGMII      0xb
+
+#define MII_M1111_HWCFG_MODE_MASK               0xf
+#define MII_M1111_HWCFG_MODE_COPPER_RGMII       0xb
+#define MII_M1111_HWCFG_MODE_FIBER_RGMII        0x3
 #define MII_M1111_HWCFG_MODE_SGMII_NO_CLK       0x4
+#define MII_M1111_HWCFG_FIBER_COPPER_AUTO       0x8000
+#define MII_M1111_HWCFG_FIBER_COPPER_RES        0x2000
+
+#define MII_M1111_COPPER                0
+#define MII_M1111_FIBER                 1
+
+#define MII_M1011_PHY_STATUS            0x11
+#define MII_M1011_PHY_STATUS_1000       0x8000
+#define MII_M1011_PHY_STATUS_100        0x4000
+#define MII_M1011_PHY_STATUS_SPD_MASK   0xc000
+#define MII_M1011_PHY_STATUS_FULLDUPLEX 0x2000
+#define MII_M1011_PHY_STATUS_RESOLVED   0x0800
+#define MII_M1011_PHY_STATUS_LINK       0x0400
+
 
 MODULE_DESCRIPTION("Marvell PHY driver");
 MODULE_AUTHOR("Andy Fleming");
@@ -141,12 +157,22 @@ static int marvell_config_aneg(struct phy_device *phydev)
 static int m88e1111_config_init(struct phy_device *phydev)
 {
         int err;
+        int temp;
+        int mode;
+
+        /* Enable Fiber/Copper auto selection */
+        temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
+        temp |= MII_M1111_HWCFG_FIBER_COPPER_AUTO;
+        phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
+
+        temp = phy_read(phydev, MII_BMCR);
+        temp |= BMCR_RESET;
+        phy_write(phydev, MII_BMCR, temp);
 
         if ((phydev->interface == PHY_INTERFACE_MODE_RGMII) ||
             (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) ||
             (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) ||
             (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)) {
-                int temp;
 
                 temp = phy_read(phydev, MII_M1111_PHY_EXT_CR);
                 if (temp < 0)
@@ -171,7 +197,13 @@ static int m88e1111_config_init(struct phy_device *phydev)
                         return temp;
 
                 temp &= ~(MII_M1111_HWCFG_MODE_MASK);
-                temp |= MII_M1111_HWCFG_MODE_RGMII;
+
+                mode = phy_read(phydev, MII_M1111_PHY_EXT_CR);
+
+                if (mode & MII_M1111_HWCFG_FIBER_COPPER_RES)
+                        temp |= MII_M1111_HWCFG_MODE_FIBER_RGMII;
+                else
+                        temp |= MII_M1111_HWCFG_MODE_COPPER_RGMII;
 
                 err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
                 if (err < 0)
@@ -262,6 +294,93 @@ static int m88e1145_config_init(struct phy_device *phydev)
         return 0;
 }
 
+/* marvell_read_status
+ *
+ * Generic status code does not detect Fiber correctly!
+ * Description: 
+ *   Check the link, then figure out the current state
+ *   by comparing what we advertise with what the link partner
+ *   advertises.  Start by checking the gigabit possibilities,
+ *   then move on to 10/100.
+ */
+static int marvell_read_status(struct phy_device *phydev)
+{
+        int adv;
+        int err;
+        int lpa;
+        int status = 0;
+
+        /* Update the link, but return if there
+         * was an error */
+        err = genphy_update_link(phydev);
+        if (err)
+                return err;
+
+        if (AUTONEG_ENABLE == phydev->autoneg) {
+                status = phy_read(phydev, MII_M1011_PHY_STATUS);
+                if (status < 0)
+                        return status;
+
+                lpa = phy_read(phydev, MII_LPA);
+                if (lpa < 0)
+                        return lpa;
+
+                adv = phy_read(phydev, MII_ADVERTISE);
+                if (adv < 0)
+                        return adv;
+
+                lpa &= adv;
+
+                if (status & MII_M1011_PHY_STATUS_FULLDUPLEX)
+                        phydev->duplex = DUPLEX_FULL;
+                else
+                        phydev->duplex = DUPLEX_HALF;
+
+                status = status & MII_M1011_PHY_STATUS_SPD_MASK;
+                phydev->pause = phydev->asym_pause = 0;
+
+                switch (status) {
+                case MII_M1011_PHY_STATUS_1000:
+                        phydev->speed = SPEED_1000;
+                        break;
+
+                case MII_M1011_PHY_STATUS_100:
+                        phydev->speed = SPEED_100;
+                        break;
+
+                default:
+                        phydev->speed = SPEED_10;
+                        break;
+                }
+
+                if (phydev->duplex == DUPLEX_FULL) {
+                        phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
+                        phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
+                }
+        } else {
+                int bmcr = phy_read(phydev, MII_BMCR);
+
+                if (bmcr < 0)
+                        return bmcr;
+
+                if (bmcr & BMCR_FULLDPLX)
+                        phydev->duplex = DUPLEX_FULL;
+                else
+                        phydev->duplex = DUPLEX_HALF;
+
+                if (bmcr & BMCR_SPEED1000)
+                        phydev->speed = SPEED_1000;
+                else if (bmcr & BMCR_SPEED100)
+                        phydev->speed = SPEED_100;
+                else
+                        phydev->speed = SPEED_10;
+
+                phydev->pause = phydev->asym_pause = 0;
+        }
+
+        return 0;
+}
+
 static struct phy_driver marvell_drivers[] = {
         {
                 .phy_id = 0x01410c60,
@@ -296,7 +415,7 @@ static struct phy_driver marvell_drivers[] = {
                 .flags = PHY_HAS_INTERRUPT,
                 .config_init = &m88e1111_config_init,
                 .config_aneg = &marvell_config_aneg,
-                .read_status = &genphy_read_status,
+                .read_status = &marvell_read_status,
                 .ack_interrupt = &marvell_ack_interrupt,
                 .config_intr = &marvell_config_intr,
                 .driver = { .owner = THIS_MODULE },