cxgb3: Add 1G fiber support

Add support for 1G optical Vitesse PHY.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 184 insertions, 12 deletions

diff --git a/drivers/net/cxgb3/vsc8211.c b/drivers/net/cxgb3/vsc8211.c
index 68e6334c206a..306c2dc4ab34 100644
--- a/drivers/net/cxgb3/vsc8211.c
+++ b/drivers/net/cxgb3/vsc8211.c
@@ -33,28 +33,40 @@
 
 /* VSC8211 PHY specific registers. */
 enum {
+        VSC8211_SIGDET_CTRL = 19,
+        VSC8211_EXT_CTRL = 23,
         VSC8211_INTR_ENABLE = 25,
         VSC8211_INTR_STATUS = 26,
+        VSC8211_LED_CTRL = 27,
         VSC8211_AUX_CTRL_STAT = 28,
+        VSC8211_EXT_PAGE_AXS = 31,
 };
 
 enum {
         VSC_INTR_RX_ERR = 1 << 0,
-        VSC_INTR_MS_ERR = 1 << 1,       /* master/slave resolution error */
-        VSC_INTR_CABLE = 1 << 2,        /* cable impairment */
-        VSC_INTR_FALSE_CARR = 1 << 3,   /* false carrier */
-        VSC_INTR_MEDIA_CHG = 1 << 4,    /* AMS media change */
-        VSC_INTR_RX_FIFO = 1 << 5,      /* Rx FIFO over/underflow */
-        VSC_INTR_TX_FIFO = 1 << 6,      /* Tx FIFO over/underflow */
-        VSC_INTR_DESCRAMBL = 1 << 7,    /* descrambler lock-lost */
-        VSC_INTR_SYMBOL_ERR = 1 << 8,   /* symbol error */
-        VSC_INTR_NEG_DONE = 1 << 10,    /* autoneg done */
-        VSC_INTR_NEG_ERR = 1 << 11,     /* autoneg error */
-        VSC_INTR_LINK_CHG = 1 << 13,    /* link change */
-        VSC_INTR_ENABLE = 1 << 15,      /* interrupt enable */
+        VSC_INTR_MS_ERR = 1 << 1,  /* master/slave resolution error */
+        VSC_INTR_CABLE = 1 << 2,  /* cable impairment */
+        VSC_INTR_FALSE_CARR = 1 << 3,  /* false carrier */
+        VSC_INTR_MEDIA_CHG = 1 << 4,  /* AMS media change */
+        VSC_INTR_RX_FIFO = 1 << 5,  /* Rx FIFO over/underflow */
+        VSC_INTR_TX_FIFO = 1 << 6,  /* Tx FIFO over/underflow */
+        VSC_INTR_DESCRAMBL = 1 << 7,  /* descrambler lock-lost */
+        VSC_INTR_SYMBOL_ERR = 1 << 8,  /* symbol error */
+        VSC_INTR_NEG_DONE = 1 << 10, /* autoneg done */
+        VSC_INTR_NEG_ERR = 1 << 11, /* autoneg error */
+        VSC_INTR_DPLX_CHG = 1 << 12, /* duplex change */
+        VSC_INTR_LINK_CHG = 1 << 13, /* link change */
+        VSC_INTR_SPD_CHG = 1 << 14, /* speed change */
+        VSC_INTR_ENABLE = 1 << 15, /* interrupt enable */
+};
+
+enum {
+        VSC_CTRL_CLAUSE37_VIEW = 1 << 4,   /* Switch to Clause 37 view */
+        VSC_CTRL_MEDIA_MODE_HI = 0xf000    /* High part of media mode select */
 };
 
 #define CFG_CHG_INTR_MASK (VSC_INTR_LINK_CHG | VSC_INTR_NEG_ERR | \
+                           VSC_INTR_DPLX_CHG | VSC_INTR_SPD_CHG | \
                            VSC_INTR_NEG_DONE)
 #define INTR_MASK (CFG_CHG_INTR_MASK | VSC_INTR_TX_FIFO | VSC_INTR_RX_FIFO | \
                    VSC_INTR_ENABLE)
@@ -184,6 +196,112 @@ static int vsc8211_get_link_status(struct cphy *cphy, int *link_ok,
         return 0;
 }
 
+static int vsc8211_get_link_status_fiber(struct cphy *cphy, int *link_ok,
+                                         int *speed, int *duplex, int *fc)
+{
+        unsigned int bmcr, status, lpa, adv;
+        int err, sp = -1, dplx = -1, pause = 0;
+
+        err = mdio_read(cphy, 0, MII_BMCR, &bmcr);
+        if (!err)
+                err = mdio_read(cphy, 0, MII_BMSR, &status);
+        if (err)
+                return err;
+
+        if (link_ok) {
+                /*
+                 * BMSR_LSTATUS is latch-low, so if it is 0 we need to read it
+                 * once more to get the current link state.
+                 */
+                if (!(status & BMSR_LSTATUS))
+                        err = mdio_read(cphy, 0, MII_BMSR, &status);
+                if (err)
+                        return err;
+                *link_ok = (status & BMSR_LSTATUS) != 0;
+        }
+        if (!(bmcr & BMCR_ANENABLE)) {
+                dplx = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
+                if (bmcr & BMCR_SPEED1000)
+                        sp = SPEED_1000;
+                else if (bmcr & BMCR_SPEED100)
+                        sp = SPEED_100;
+                else
+                        sp = SPEED_10;
+        } else if (status & BMSR_ANEGCOMPLETE) {
+                err = mdio_read(cphy, 0, MII_LPA, &lpa);
+                if (!err)
+                        err = mdio_read(cphy, 0, MII_ADVERTISE, &adv);
+                if (err)
+                        return err;
+
+                if (adv & lpa & ADVERTISE_1000XFULL) {
+                        dplx = DUPLEX_FULL;
+                        sp = SPEED_1000;
+                } else if (adv & lpa & ADVERTISE_1000XHALF) {
+                        dplx = DUPLEX_HALF;
+                        sp = SPEED_1000;
+                }
+
+                if (fc && dplx == DUPLEX_FULL) {
+                        if (lpa & adv & ADVERTISE_1000XPAUSE)
+                                pause = PAUSE_RX | PAUSE_TX;
+                        else if ((lpa & ADVERTISE_1000XPAUSE) &&
+                                 (adv & lpa & ADVERTISE_1000XPSE_ASYM))
+                                pause = PAUSE_TX;
+                        else if ((lpa & ADVERTISE_1000XPSE_ASYM) &&
+                                 (adv & ADVERTISE_1000XPAUSE))
+                                pause = PAUSE_RX;
+                }
+        }
+        if (speed)
+                *speed = sp;
+        if (duplex)
+                *duplex = dplx;
+        if (fc)
+                *fc = pause;
+        return 0;
+}
+
+/*
+ * Enable/disable auto MDI/MDI-X in forced link speed mode.
+ */
+static int vsc8211_set_automdi(struct cphy *phy, int enable)
+{
+        int err;
+
+        err = mdio_write(phy, 0, VSC8211_EXT_PAGE_AXS, 0x52b5);
+        if (err)
+                return err;
+
+        err = mdio_write(phy, 0, 18, 0x12);
+        if (err)
+                return err;
+
+        err = mdio_write(phy, 0, 17, enable ? 0x2803 : 0x3003);
+        if (err)
+                return err;
+
+        err = mdio_write(phy, 0, 16, 0x87fa);
+        if (err)
+                return err;
+
+        err = mdio_write(phy, 0, VSC8211_EXT_PAGE_AXS, 0);
+        if (err)
+                return err;
+
+        return 0;
+}
+
+int vsc8211_set_speed_duplex(struct cphy *phy, int speed, int duplex)
+{
+        int err;
+
+        err = t3_set_phy_speed_duplex(phy, speed, duplex);
+        if (!err)
+                err = vsc8211_set_automdi(phy, 1);
+        return err;
+}
+
 static int vsc8211_power_down(struct cphy *cphy, int enable)
 {
         return t3_mdio_change_bits(cphy, 0, MII_BMCR, BMCR_PDOWN,
@@ -221,12 +339,66 @@ static struct cphy_ops vsc8211_ops = {
         .power_down = vsc8211_power_down,
 };
 
+static struct cphy_ops vsc8211_fiber_ops = {
+        .reset = vsc8211_reset,
+        .intr_enable = vsc8211_intr_enable,
+        .intr_disable = vsc8211_intr_disable,
+        .intr_clear = vsc8211_intr_clear,
+        .intr_handler = vsc8211_intr_handler,
+        .autoneg_enable = vsc8211_autoneg_enable,
+        .autoneg_restart = vsc8211_autoneg_restart,
+        .advertise = t3_phy_advertise_fiber,
+        .set_speed_duplex = t3_set_phy_speed_duplex,
+        .get_link_status = vsc8211_get_link_status_fiber,
+        .power_down = vsc8211_power_down,
+};
+
 int t3_vsc8211_phy_prep(struct cphy *phy, struct adapter *adapter,
                         int phy_addr, const struct mdio_ops *mdio_ops)
 {
+        int err;
+        unsigned int val;
+
         cphy_init(phy, adapter, phy_addr, &vsc8211_ops, mdio_ops,
                   SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Full |
                   SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_MII |
                   SUPPORTED_TP | SUPPORTED_IRQ, "10/100/1000BASE-T");
+        msleep(20);       /* PHY needs ~10ms to start responding to MDIO */
+
+        err = mdio_read(phy, 0, VSC8211_EXT_CTRL, &val);
+        if (err)
+                return err;
+        if (val & VSC_CTRL_MEDIA_MODE_HI) {
+                /* copper interface, just need to configure the LEDs */
+                return mdio_write(phy, 0, VSC8211_LED_CTRL, 0x100);
+        }
+
+        phy->caps = SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
+                    SUPPORTED_MII | SUPPORTED_FIBRE | SUPPORTED_IRQ;
+        phy->desc = "1000BASE-X";
+        phy->ops = &vsc8211_fiber_ops;
+
+        err = mdio_write(phy, 0, VSC8211_EXT_PAGE_AXS, 1);
+        if (err)
+                return err;
+
+        err = mdio_write(phy, 0, VSC8211_SIGDET_CTRL, 1);
+        if (err)
+                return err;
+
+        err = mdio_write(phy, 0, VSC8211_EXT_PAGE_AXS, 0);
+        if (err)
+                return err;
+
+        err = mdio_write(phy, 0, VSC8211_EXT_CTRL,
+                         val | VSC_CTRL_CLAUSE37_VIEW);
+        if (err)
+                return err;
+
+        err = vsc8211_reset(phy, 0);
+        if (err)
+                return err;
+
+        udelay(5); /* delay after reset before next SMI */
         return 0;
 }