[TG3]: add 5780 fiber support

Add 5780S support by adding a new tg3_setup_fiber_mii_phy() function and
a timer function for parallel link detection. 5780S uses standard MII
registers for 1000BaseX and runs in GMII mode as opposed to TBI mode on
older serdes chips.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 253 insertions, 7 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 04d8b18e2912..ffc854c4ab01 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -1100,7 +1100,7 @@ static int tg3_set_power_state(struct tg3 *tp, int state)
                 tp->link_config.orig_autoneg = tp->link_config.autoneg;
         }
 
-        if (!(tp->tg3_flags2 & TG3_FLG2_PHY_SERDES)) {
+        if (!(tp->tg3_flags2 & TG3_FLG2_ANY_SERDES)) {
                 tp->link_config.speed = SPEED_10;
                 tp->link_config.duplex = DUPLEX_HALF;
                 tp->link_config.autoneg = AUTONEG_ENABLE;
@@ -1247,6 +1247,25 @@ static void tg3_setup_flow_control(struct tg3 *tp, u32 local_adv, u32 remote_adv
         u32 old_tx_mode = tp->tx_mode;
 
         if (tp->tg3_flags & TG3_FLAG_PAUSE_AUTONEG) {
+
+                /* Convert 1000BaseX flow control bits to 1000BaseT
+                 * bits before resolving flow control.
+                 */
+                if (tp->tg3_flags2 & TG3_FLG2_MII_SERDES) {
+                        local_adv &= ~(ADVERTISE_PAUSE_CAP |
+                                       ADVERTISE_PAUSE_ASYM);
+                        remote_adv &= ~(LPA_PAUSE_CAP | LPA_PAUSE_ASYM);
+
+                        if (local_adv & ADVERTISE_1000XPAUSE)
+                                local_adv |= ADVERTISE_PAUSE_CAP;
+                        if (local_adv & ADVERTISE_1000XPSE_ASYM)
+                                local_adv |= ADVERTISE_PAUSE_ASYM;
+                        if (remote_adv & LPA_1000XPAUSE)
+                                remote_adv |= LPA_PAUSE_CAP;
+                        if (remote_adv & LPA_1000XPAUSE_ASYM)
+                                remote_adv |= LPA_PAUSE_ASYM;
+                }
+
                 if (local_adv & ADVERTISE_PAUSE_CAP) {
                         if (local_adv & ADVERTISE_PAUSE_ASYM) {
                                 if (remote_adv & LPA_PAUSE_CAP)
@@ -2507,12 +2526,226 @@ static int tg3_setup_fiber_phy(struct tg3 *tp, int force_reset)
         return 0;
 }
 
+static int tg3_setup_fiber_mii_phy(struct tg3 *tp, int force_reset)
+{
+        int current_link_up, err = 0;
+        u32 bmsr, bmcr;
+        u16 current_speed;
+        u8 current_duplex;
+
+        tp->mac_mode |= MAC_MODE_PORT_MODE_GMII;
+        tw32_f(MAC_MODE, tp->mac_mode);
+        udelay(40);
+
+        tw32(MAC_EVENT, 0);
+
+        tw32_f(MAC_STATUS,
+             (MAC_STATUS_SYNC_CHANGED |
+              MAC_STATUS_CFG_CHANGED |
+              MAC_STATUS_MI_COMPLETION |
+              MAC_STATUS_LNKSTATE_CHANGED));
+        udelay(40);
+
+        if (force_reset)
+                tg3_phy_reset(tp);
+
+        current_link_up = 0;
+        current_speed = SPEED_INVALID;
+        current_duplex = DUPLEX_INVALID;
+
+        err |= tg3_readphy(tp, MII_BMSR, &bmsr);
+        err |= tg3_readphy(tp, MII_BMSR, &bmsr);
+
+        err |= tg3_readphy(tp, MII_BMCR, &bmcr);
+
+        if ((tp->link_config.autoneg == AUTONEG_ENABLE) && !force_reset &&
+            (tp->tg3_flags2 & TG3_FLG2_PARALLEL_DETECT)) {
+                /* do nothing, just check for link up at the end */
+        } else if (tp->link_config.autoneg == AUTONEG_ENABLE) {
+                u32 adv, new_adv;
+
+                err |= tg3_readphy(tp, MII_ADVERTISE, &adv);
+                new_adv = adv & ~(ADVERTISE_1000XFULL | ADVERTISE_1000XHALF |
+                                  ADVERTISE_1000XPAUSE |
+                                  ADVERTISE_1000XPSE_ASYM |
+                                  ADVERTISE_SLCT);
+
+                /* Always advertise symmetric PAUSE just like copper */
+                new_adv |= ADVERTISE_1000XPAUSE;
+
+                if (tp->link_config.advertising & ADVERTISED_1000baseT_Half)
+                        new_adv |= ADVERTISE_1000XHALF;
+                if (tp->link_config.advertising & ADVERTISED_1000baseT_Full)
+                        new_adv |= ADVERTISE_1000XFULL;
+
+                if ((new_adv != adv) || !(bmcr & BMCR_ANENABLE)) {
+                        tg3_writephy(tp, MII_ADVERTISE, new_adv);
+                        bmcr |= BMCR_ANENABLE | BMCR_ANRESTART;
+                        tg3_writephy(tp, MII_BMCR, bmcr);
+
+                        tw32_f(MAC_EVENT, MAC_EVENT_LNKSTATE_CHANGED);
+                        tp->tg3_flags2 |= TG3_FLG2_PHY_JUST_INITTED;
+                        tp->tg3_flags2 &= ~TG3_FLG2_PARALLEL_DETECT;
+
+                        return err;
+                }
+        } else {
+                u32 new_bmcr;
+
+                bmcr &= ~BMCR_SPEED1000;
+                new_bmcr = bmcr & ~(BMCR_ANENABLE | BMCR_FULLDPLX);
+
+                if (tp->link_config.duplex == DUPLEX_FULL)
+                        new_bmcr |= BMCR_FULLDPLX;
+
+                if (new_bmcr != bmcr) {
+                        /* BMCR_SPEED1000 is a reserved bit that needs
+                         * to be set on write.
+                         */
+                        new_bmcr |= BMCR_SPEED1000;
+
+                        /* Force a linkdown */
+                        if (netif_carrier_ok(tp->dev)) {
+                                u32 adv;
+
+                                err |= tg3_readphy(tp, MII_ADVERTISE, &adv);
+                                adv &= ~(ADVERTISE_1000XFULL |
+                                         ADVERTISE_1000XHALF |
+                                         ADVERTISE_SLCT);
+                                tg3_writephy(tp, MII_ADVERTISE, adv);
+                                tg3_writephy(tp, MII_BMCR, bmcr |
+                                                           BMCR_ANRESTART |
+                                                           BMCR_ANENABLE);
+                                udelay(10);
+                                netif_carrier_off(tp->dev);
+                        }
+                        tg3_writephy(tp, MII_BMCR, new_bmcr);
+                        bmcr = new_bmcr;
+                        err |= tg3_readphy(tp, MII_BMSR, &bmsr);
+                        err |= tg3_readphy(tp, MII_BMSR, &bmsr);
+                        tp->tg3_flags2 &= ~TG3_FLG2_PARALLEL_DETECT;
+                }
+        }
+
+        if (bmsr & BMSR_LSTATUS) {
+                current_speed = SPEED_1000;
+                current_link_up = 1;
+                if (bmcr & BMCR_FULLDPLX)
+                        current_duplex = DUPLEX_FULL;
+                else
+                        current_duplex = DUPLEX_HALF;
+
+                if (bmcr & BMCR_ANENABLE) {
+                        u32 local_adv, remote_adv, common;
+
+                        err |= tg3_readphy(tp, MII_ADVERTISE, &local_adv);
+                        err |= tg3_readphy(tp, MII_LPA, &remote_adv);
+                        common = local_adv & remote_adv;
+                        if (common & (ADVERTISE_1000XHALF |
+                                      ADVERTISE_1000XFULL)) {
+                                if (common & ADVERTISE_1000XFULL)
+                                        current_duplex = DUPLEX_FULL;
+                                else
+                                        current_duplex = DUPLEX_HALF;
+
+                                tg3_setup_flow_control(tp, local_adv,
+                                                       remote_adv);
+                        }
+                        else
+                                current_link_up = 0;
+                }
+        }
+
+        tp->mac_mode &= ~MAC_MODE_HALF_DUPLEX;
+        if (tp->link_config.active_duplex == DUPLEX_HALF)
+                tp->mac_mode |= MAC_MODE_HALF_DUPLEX;
+
+        tw32_f(MAC_MODE, tp->mac_mode);
+        udelay(40);
+
+        tw32_f(MAC_EVENT, MAC_EVENT_LNKSTATE_CHANGED);
+
+        tp->link_config.active_speed = current_speed;
+        tp->link_config.active_duplex = current_duplex;
+
+        if (current_link_up != netif_carrier_ok(tp->dev)) {
+                if (current_link_up)
+                        netif_carrier_on(tp->dev);
+                else {
+                        netif_carrier_off(tp->dev);
+                        tp->tg3_flags2 &= ~TG3_FLG2_PARALLEL_DETECT;
+                }
+                tg3_link_report(tp);
+        }
+        return err;
+}
+
+static void tg3_serdes_parallel_detect(struct tg3 *tp)
+{
+        if (tp->tg3_flags2 & TG3_FLG2_PHY_JUST_INITTED) {
+                /* Give autoneg time to complete. */
+                tp->tg3_flags2 &= ~TG3_FLG2_PHY_JUST_INITTED;
+                return;
+        }
+        if (!netif_carrier_ok(tp->dev) &&
+            (tp->link_config.autoneg == AUTONEG_ENABLE)) {
+                u32 bmcr;
+
+                tg3_readphy(tp, MII_BMCR, &bmcr);
+                if (bmcr & BMCR_ANENABLE) {
+                        u32 phy1, phy2;
+
+                        /* Select shadow register 0x1f */
+                        tg3_writephy(tp, 0x1c, 0x7c00);
+                        tg3_readphy(tp, 0x1c, &phy1);
+
+                        /* Select expansion interrupt status register */
+                        tg3_writephy(tp, 0x17, 0x0f01);
+                        tg3_readphy(tp, 0x15, &phy2);
+                        tg3_readphy(tp, 0x15, &phy2);
+
+                        if ((phy1 & 0x10) && !(phy2 & 0x20)) {
+                                /* We have signal detect and not receiving
+                                 * config code words, link is up by parallel
+                                 * detection.
+                                 */
+
+                                bmcr &= ~BMCR_ANENABLE;
+                                bmcr |= BMCR_SPEED1000 | BMCR_FULLDPLX;
+                                tg3_writephy(tp, MII_BMCR, bmcr);
+                                tp->tg3_flags2 |= TG3_FLG2_PARALLEL_DETECT;
+                        }
+                }
+        }
+        else if (netif_carrier_ok(tp->dev) &&
+                 (tp->link_config.autoneg == AUTONEG_ENABLE) &&
+                 (tp->tg3_flags2 & TG3_FLG2_PARALLEL_DETECT)) {
+                u32 phy2;
+
+                /* Select expansion interrupt status register */
+                tg3_writephy(tp, 0x17, 0x0f01);
+                tg3_readphy(tp, 0x15, &phy2);
+                if (phy2 & 0x20) {
+                        u32 bmcr;
+
+                        /* Config code words received, turn on autoneg. */
+                        tg3_readphy(tp, MII_BMCR, &bmcr);
+                        tg3_writephy(tp, MII_BMCR, bmcr | BMCR_ANENABLE);
+
+                        tp->tg3_flags2 &= ~TG3_FLG2_PARALLEL_DETECT;
+
+                }
+        }
+}
+
 static int tg3_setup_phy(struct tg3 *tp, int force_reset)
 {
         int err;
 
         if (tp->tg3_flags2 & TG3_FLG2_PHY_SERDES) {
                 err = tg3_setup_fiber_phy(tp, force_reset);
+        } else if (tp->tg3_flags2 & TG3_FLG2_MII_SERDES) {
+                err = tg3_setup_fiber_mii_phy(tp, force_reset);
         } else {
                 err = tg3_setup_copper_phy(tp, force_reset);
         }
@@ -4127,6 +4360,9 @@ static int tg3_chip_reset(struct tg3 *tp)
         if (tp->tg3_flags2 & TG3_FLG2_PHY_SERDES) {
                 tp->mac_mode = MAC_MODE_PORT_MODE_TBI;
                 tw32_f(MAC_MODE, tp->mac_mode);
+        } else if (tp->tg3_flags2 & TG3_FLG2_MII_SERDES) {
+                tp->mac_mode = MAC_MODE_PORT_MODE_GMII;
+                tw32_f(MAC_MODE, tp->mac_mode);
         } else
                 tw32_f(MAC_MODE, 0);
         udelay(40);
@@ -5911,7 +6147,8 @@ static void tg3_timer(unsigned long __opaque)
                                 udelay(40);
                                 tg3_setup_phy(tp, 0);
                         }
-                }
+                } else if (tp->tg3_flags2 & TG3_FLG2_MII_SERDES)
+                        tg3_serdes_parallel_detect(tp);
 
                 tp->timer_counter = tp->timer_multiplier;
         }
@@ -8615,8 +8852,12 @@ static void __devinit tg3_get_eeprom_hw_cfg(struct tg3 *tp)
                         eeprom_phy_id = 0;
 
                 tp->phy_id = eeprom_phy_id;
-                if (eeprom_phy_serdes)
-                        tp->tg3_flags2 |= TG3_FLG2_PHY_SERDES;
+                if (eeprom_phy_serdes) {
+                        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780)
+                                tp->tg3_flags2 |= TG3_FLG2_MII_SERDES;
+                        else
+                                tp->tg3_flags2 |= TG3_FLG2_PHY_SERDES;
+                }
 
                 if (tp->tg3_flags2 & TG3_FLG2_5750_PLUS)
                         led_cfg = cfg2 & (NIC_SRAM_DATA_CFG_LED_MODE_MASK |
@@ -8751,7 +8992,7 @@ static int __devinit tg3_phy_probe(struct tg3 *tp)
                 }
         }
 
-        if (!(tp->tg3_flags2 & TG3_FLG2_PHY_SERDES) &&
+        if (!(tp->tg3_flags2 & TG3_FLG2_ANY_SERDES) &&
             !(tp->tg3_flags & TG3_FLAG_ENABLE_ASF)) {
                 u32 bmsr, adv_reg, tg3_ctrl;
 
@@ -8804,7 +9045,7 @@ skip_phy_reset:
                 err = tg3_init_5401phy_dsp(tp);
         }
 
-        if (tp->tg3_flags2 & TG3_FLG2_PHY_SERDES)
+        if (tp->tg3_flags2 & TG3_FLG2_ANY_SERDES)
                 tp->link_config.advertising =
                         (ADVERTISED_1000baseT_Half |
                          ADVERTISED_1000baseT_Full |
@@ -9153,7 +9394,8 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
         if ((GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5700) ||
             ((GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705) &&
              (tp->pci_chip_rev_id != CHIPREV_ID_5705_A0) &&
-             (tp->pci_chip_rev_id != CHIPREV_ID_5705_A1)))
+             (tp->pci_chip_rev_id != CHIPREV_ID_5705_A1)) ||
+            (tp->tg3_flags2 & TG3_FLG2_ANY_SERDES))
                 tp->tg3_flags2 |= TG3_FLG2_NO_ETH_WIRE_SPEED;
 
         if (GET_CHIP_REV(tp->pci_chip_rev_id) == CHIPREV_5703_AX ||
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 0a277c1e75d1..5c4433c147fa 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2161,6 +2161,10 @@ struct tg3 {
 #define TG3_FLG2_PROTECTED_NVRAM        0x00100000
 #define TG3_FLG2_USING_MSI              0x00200000
 #define TG3_FLG2_JUMBO_CAPABLE          0x00400000
+#define TG3_FLG2_MII_SERDES             0x00800000
+#define TG3_FLG2_ANY_SERDES             (TG3_FLG2_PHY_SERDES |  \
+                                        TG3_FLG2_MII_SERDES)
+#define TG3_FLG2_PARALLEL_DETECT        0x01000000
 
         u32                             split_mode_max_reqs;
 #define SPLIT_MODE_5704_MAX_REQ         3