2 files changed, 81 insertions, 45 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 20a8c34e6d53..b8f202169a75 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -284,6 +284,31 @@ static void sky2_gmac_reset(struct sky2_hw *hw, unsigned port)
         gma_write16(hw, port, GM_RX_CTRL, reg);
 }
 
+/* flow control to advertise bits */
+static const u16 copper_fc_adv[] = {
+        [FC_NONE]       = 0,
+        [FC_TX]         = PHY_M_AN_ASP,
+        [FC_RX]         = PHY_M_AN_PC,
+        [FC_BOTH]       = PHY_M_AN_PC | PHY_M_AN_ASP,
+};
+
+/* flow control to advertise bits when using 1000BaseX */
+static const u16 fiber_fc_adv[] = {
+        [FC_BOTH] = PHY_M_P_BOTH_MD_X,
+        [FC_TX]   = PHY_M_P_ASYM_MD_X,
+        [FC_RX]   = PHY_M_P_SYM_MD_X,
+        [FC_NONE] = PHY_M_P_NO_PAUSE_X,
+};
+
+/* flow control to GMA disable bits */
+static const u16 gm_fc_disable[] = {
+        [FC_NONE] = GM_GPCR_FC_RX_DIS | GM_GPCR_FC_TX_DIS,
+        [FC_TX]   = GM_GPCR_FC_RX_DIS,
+        [FC_RX]   = GM_GPCR_FC_TX_DIS,
+        [FC_BOTH] = 0,
+};
+
+
 static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
 {
         struct sky2_port *sky2 = netdev_priv(hw->dev[port]);
@@ -376,29 +401,14 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
                         if (sky2->advertising & ADVERTISED_10baseT_Half)
                                 adv |= PHY_M_AN_10_HD;
 
-                        /* desired flow control */
-                        if (sky2->tx_pause && sky2->rx_pause)   /* both */
-                                adv |= PHY_M_AN_PC | PHY_M_AN_ASP;
-                        else if (sky2->tx_pause)
-                                adv |= PHY_M_AN_ASP;
-                        else if (sky2->rx_pause)
-                                adv |= PHY_M_AN_PC;
-
-
+                        adv |= copper_fc_adv[sky2->flow_mode];
                 } else {        /* special defines for FIBER (88E1040S only) */
                         if (sky2->advertising & ADVERTISED_1000baseT_Full)
                                 adv |= PHY_M_AN_1000X_AFD;
                         if (sky2->advertising & ADVERTISED_1000baseT_Half)
                                 adv |= PHY_M_AN_1000X_AHD;
 
-                        if (sky2->tx_pause && sky2->rx_pause)   /* both */
-                                adv |= PHY_M_P_BOTH_MD_X;
-                        else if (sky2->tx_pause)
-                                adv |= PHY_M_P_ASYM_MD_X;
-                        else if (sky2->rx_pause)
-                                adv |= PHY_M_P_SYM_MD_X;
-                        else
-                                adv |= PHY_M_P_NO_PAUSE_X;
+                        adv |= fiber_fc_adv[sky2->flow_mode];
                 }
 
                 /* Restart Auto-negotiation */
@@ -424,20 +434,14 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
                 if (sky2->duplex == DUPLEX_FULL) {
                         reg |= GM_GPCR_DUP_FULL;
                         ctrl |= PHY_CT_DUP_MD;
-                } else if (sky2->speed != SPEED_1000 && hw->chip_id != CHIP_ID_YUKON_EC_U) {
-                        /* Turn off flow control for 10/100mbps */
-                        sky2->rx_pause = 0;
-                        sky2->tx_pause = 0;
-                }
+                } else if (sky2->speed < SPEED_1000)
+                        sky2->flow_mode = FC_NONE;
 
-                if (!sky2->rx_pause)
-                        reg |= GM_GPCR_FC_RX_DIS;
 
-                if (!sky2->tx_pause)
-                        reg |= GM_GPCR_FC_TX_DIS;
+                reg |= gm_fc_disable[sky2->flow_mode];
 
                 /* Forward pause packets to GMAC? */
-                if (sky2->tx_pause || sky2->rx_pause)
+                if (sky2->flow_mode & FC_RX)
                         sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_ON);
                 else
                         sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
@@ -1605,6 +1609,12 @@ static void sky2_link_up(struct sky2_port *sky2)
         struct sky2_hw *hw = sky2->hw;
         unsigned port = sky2->port;
         u16 reg;
+        static const char *fc_name[] = {
+                [FC_NONE]       = "none",
+                [FC_TX]         = "tx",
+                [FC_RX]         = "rx",
+                [FC_BOTH]       = "both",
+        };
 
         /* enable Rx/Tx */
         reg = gma_read16(hw, port, GM_GP_CTRL);
@@ -1648,8 +1658,7 @@ static void sky2_link_up(struct sky2_port *sky2)
                        "%s: Link is up at %d Mbps, %s duplex, flow control %s\n",
                        sky2->netdev->name, sky2->speed,
                        sky2->duplex == DUPLEX_FULL ? "full" : "half",
-                       (sky2->tx_pause && sky2->rx_pause) ? "both" :
-                       sky2->tx_pause ? "tx" : sky2->rx_pause ? "rx" : "none");
+                       fc_name[sky2->flow_status]);
 }
 
 static void sky2_link_down(struct sky2_port *sky2)
@@ -1664,7 +1673,7 @@ static void sky2_link_down(struct sky2_port *sky2)
         reg &= ~(GM_GPCR_RX_ENA | GM_GPCR_TX_ENA);
         gma_write16(hw, port, GM_GP_CTRL, reg);
 
-        if (sky2->rx_pause && !sky2->tx_pause) {
+        if (sky2->flow_status == FC_RX) {
                 /* restore Asymmetric Pause bit */
                 gm_phy_write(hw, port, PHY_MARV_AUNE_ADV,
                              gm_phy_read(hw, port, PHY_MARV_AUNE_ADV)
@@ -1683,6 +1692,14 @@ static void sky2_link_down(struct sky2_port *sky2)
         sky2_phy_init(hw, port);
 }
 
+static enum flow_control sky2_flow(int rx, int tx)
+{
+        if (rx)
+                return tx ? FC_BOTH : FC_RX;
+        else
+                return tx ? FC_TX : FC_NONE;
+}
+
 static int sky2_autoneg_done(struct sky2_port *sky2, u16 aux)
 {
         struct sky2_hw *hw = sky2->hw;
@@ -1709,14 +1726,14 @@ static int sky2_autoneg_done(struct sky2_port *sky2, u16 aux)
         if (hw->chip_id == CHIP_ID_YUKON_XL || hw->chip_id == CHIP_ID_YUKON_EC_U)
                 aux >>= 6;
 
-        sky2->rx_pause = (aux & PHY_M_PS_RX_P_EN) != 0;
-        sky2->tx_pause = (aux & PHY_M_PS_TX_P_EN) != 0;
+        sky2->flow_status = sky2_flow(aux & PHY_M_PS_RX_P_EN,
+                                      aux & PHY_M_PS_TX_P_EN);
 
-        if (sky2->duplex == DUPLEX_HALF && sky2->speed != SPEED_1000
+        if (sky2->duplex == DUPLEX_HALF && sky2->speed < SPEED_1000
             && hw->chip_id != CHIP_ID_YUKON_EC_U)
-                sky2->rx_pause = sky2->tx_pause = 0;
+                sky2->flow_status = FC_NONE;
 
-        if (sky2->rx_pause || sky2->tx_pause)
+        if (aux & PHY_M_PS_RX_P_EN)
                 sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_ON);
         else
                 sky2_write8(hw, SK_REG(port, GMAC_CTRL), GMC_PAUSE_OFF);
@@ -2729,7 +2746,7 @@ static int sky2_nway_reset(struct net_device *dev)
 {
         struct sky2_port *sky2 = netdev_priv(dev);
 
-        if (sky2->autoneg != AUTONEG_ENABLE)
+        if (!netif_running(dev) || sky2->autoneg != AUTONEG_ENABLE)
                 return -EINVAL;
 
         sky2_phy_reinit(sky2);
@@ -2971,8 +2988,20 @@ static void sky2_get_pauseparam(struct net_device *dev,
 {
         struct sky2_port *sky2 = netdev_priv(dev);
 
-        ecmd->tx_pause = sky2->tx_pause;
-        ecmd->rx_pause = sky2->rx_pause;
+        switch (sky2->flow_mode) {
+        case FC_NONE:
+                ecmd->tx_pause = ecmd->rx_pause = 0;
+                break;
+        case FC_TX:
+                ecmd->tx_pause = 1, ecmd->rx_pause = 0;
+                break;
+        case FC_RX:
+                ecmd->tx_pause = 0, ecmd->rx_pause = 1;
+                break;
+        case FC_BOTH:
+                ecmd->tx_pause = ecmd->rx_pause = 1;
+        }
+
         ecmd->autoneg = sky2->autoneg;
 }
 
@@ -2982,10 +3011,10 @@ static int sky2_set_pauseparam(struct net_device *dev,
         struct sky2_port *sky2 = netdev_priv(dev);
 
         sky2->autoneg = ecmd->autoneg;
-        sky2->tx_pause = ecmd->tx_pause != 0;
-        sky2->rx_pause = ecmd->rx_pause != 0;
+        sky2->flow_mode = sky2_flow(ecmd->rx_pause, ecmd->tx_pause);
 
-        sky2_phy_reinit(sky2);
+        if (netif_running(dev))
+                sky2_phy_reinit(sky2);
 
         return 0;
 }
@@ -3215,8 +3244,8 @@ static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
 
         /* Auto speed and flow control */
         sky2->autoneg = AUTONEG_ENABLE;
-        sky2->tx_pause = 1;
-        sky2->rx_pause = 1;
+        sky2->flow_mode = FC_BOTH;
+
         sky2->duplex = -1;
         sky2->speed = -1;
         sky2->advertising = sky2_supported_modes(hw);
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index 0a8d8210679a..3f05492da703 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -1828,6 +1828,13 @@ struct rx_ring_info {
         dma_addr_t      frag_addr[ETH_JUMBO_MTU >> PAGE_SHIFT];
 };
 
+enum flow_control {
+        FC_NONE = 0,
+        FC_TX   = 1,
+        FC_RX   = 2,
+        FC_BOTH = 3,
+};
+
 struct sky2_port {
         struct sky2_hw       *hw;
         struct net_device    *netdev;
@@ -1864,9 +1871,9 @@ struct sky2_port {
         u16                  speed;     /* SPEED_1000, SPEED_100, ... */
         u8                   autoneg;   /* AUTONEG_ENABLE, AUTONEG_DISABLE */
         u8                   duplex;    /* DUPLEX_HALF, DUPLEX_FULL */
-        u8                   rx_pause;
-        u8                   tx_pause;
         u8                   rx_csum;
+        enum flow_control    flow_mode;
+        enum flow_control    flow_status;
 
         struct net_device_stats net_stats;