sky2: fix pause negotiation

The sky2 driver combines auto speed negotiation with automatic negotiation
of pause parameters; but the ethtool interface expects them to be
split. This patch allows autonegotiation to be used for speed, but
manually disable flow control.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 47 insertions, 26 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 4944fcc6b076..6788a91d68d5 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -321,7 +321,7 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
         struct sky2_port *sky2 = netdev_priv(hw->dev[port]);
         u16 ctrl, ct1000, adv, pg, ledctrl, ledover, reg;
 
-        if (sky2->autoneg == AUTONEG_ENABLE &&
+        if ( (sky2->flags & SKY2_FLAG_AUTO_SPEED) &&
             !(hw->flags & SKY2_HW_NEWER_PHY)) {
                 u16 ectrl = gm_phy_read(hw, port, PHY_MARV_EXT_CTRL);
 
@@ -363,7 +363,7 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
                         ctrl |= PHY_M_PC_MDI_XMODE(PHY_M_PC_ENA_AUTO);
 
                         /* downshift on PHY 88E1112 and 88E1149 is changed */
-                        if (sky2->autoneg == AUTONEG_ENABLE
+                        if ( (sky2->flags & SKY2_FLAG_AUTO_SPEED)
                             && (hw->flags & SKY2_HW_NEWER_PHY)) {
                                 /* set downshift counter to 3x and enable downshift */
                                 ctrl &= ~PHY_M_PC_DSC_MSK;
@@ -408,7 +408,7 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
         adv = PHY_AN_CSMA;
         reg = 0;
 
-        if (sky2->autoneg == AUTONEG_ENABLE) {
+        if (sky2->flags & SKY2_FLAG_AUTO_SPEED) {
                 if (sky2_is_copper(hw)) {
                         if (sky2->advertising & ADVERTISED_1000baseT_Full)
                                 ct1000 |= PHY_M_1000C_AFD;
@@ -423,14 +423,11 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
                         if (sky2->advertising & ADVERTISED_10baseT_Half)
                                 adv |= PHY_M_AN_10_HD;
 
-                        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;
-
-                        adv |= fiber_fc_adv[sky2->flow_mode];
                 }
 
                 /* Restart Auto-negotiation */
@@ -439,8 +436,8 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
                 /* forced speed/duplex settings */
                 ct1000 = PHY_M_1000C_MSE;
 
-                /* Disable auto update for duplex flow control and speed */
-                reg |= GM_GPCR_AU_ALL_DIS;
+                /* Disable auto update for duplex flow control and duplex */
+                reg |= GM_GPCR_AU_DUP_DIS | GM_GPCR_AU_SPD_DIS;
 
                 switch (sky2->speed) {
                 case SPEED_1000:
@@ -458,8 +455,15 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
                         ctrl |= PHY_CT_DUP_MD;
                 } else if (sky2->speed < SPEED_1000)
                         sky2->flow_mode = FC_NONE;
+        }
 
-
+        if (sky2->flags & SKY2_FLAG_AUTO_PAUSE) {
+                if (sky2_is_copper(hw))
+                        adv |= copper_fc_adv[sky2->flow_mode];
+                else
+                        adv |= fiber_fc_adv[sky2->flow_mode];
+        } else {
+                reg |= GM_GPCR_AU_FCT_DIS;
                 reg |= gm_fc_disable[sky2->flow_mode];
 
                 /* Forward pause packets to GMAC? */
@@ -594,7 +598,8 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
                 /* no effect on Yukon-XL */
                 gm_phy_write(hw, port, PHY_MARV_LED_CTRL, ledctrl);
 
-                if (sky2->autoneg == AUTONEG_DISABLE || sky2->speed == SPEED_100) {
+                if ( !(sky2->flags & SKY2_FLAG_AUTO_SPEED)
+                     || sky2->speed == SPEED_100) {
                         /* turn on 100 Mbps LED (LED_LINK100) */
                         ledover |= PHY_M_LED_MO_100(MO_LED_ON);
                 }
@@ -605,7 +610,7 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
         }
 
         /* Enable phy interrupt on auto-negotiation complete (or link up) */
-        if (sky2->autoneg == AUTONEG_ENABLE)
+        if (sky2->flags & SKY2_FLAG_AUTO_SPEED)
                 gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_IS_AN_COMPL);
         else
                 gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_DEF_MSK);
@@ -661,7 +666,9 @@ static void sky2_phy_power_down(struct sky2_hw *hw, unsigned port)
 
         /* setup General Purpose Control Register */
         gma_write16(hw, port, GM_GP_CTRL,
-                    GM_GPCR_FL_PASS | GM_GPCR_SPEED_100 | GM_GPCR_AU_ALL_DIS);
+                    GM_GPCR_FL_PASS | GM_GPCR_SPEED_100 |
+                    GM_GPCR_AU_DUP_DIS | GM_GPCR_AU_FCT_DIS |
+                    GM_GPCR_AU_SPD_DIS);
 
         if (hw->chip_id != CHIP_ID_YUKON_EC) {
                 if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
@@ -1117,7 +1124,8 @@ static void rx_set_checksum(struct sky2_port *sky2)
 
         sky2_write32(sky2->hw,
                      Q_ADDR(rxqaddr[sky2->port], Q_CSR),
-                     sky2->rx_csum ? BMU_ENA_RX_CHKSUM : BMU_DIS_RX_CHKSUM);
+                     (sky2->flags & SKY2_FLAG_RX_CHECKSUM)
+                     ? BMU_ENA_RX_CHKSUM : BMU_DIS_RX_CHKSUM);
 }
 
 /*
@@ -2087,7 +2095,7 @@ static void sky2_phy_intr(struct sky2_hw *hw, unsigned port)
                 printk(KERN_INFO PFX "%s: phy interrupt status 0x%x 0x%x\n",
                        sky2->netdev->name, istatus, phystat);
 
-        if (sky2->autoneg == AUTONEG_ENABLE && (istatus & PHY_M_IS_AN_COMPL)) {
+        if (istatus & PHY_M_IS_AN_COMPL) {
                 if (sky2_autoneg_done(sky2, phystat) == 0)
                         sky2_link_up(sky2);
                 goto out;
@@ -2453,7 +2461,7 @@ static int sky2_status_intr(struct sky2_hw *hw, int to_do, u16 idx)
 
                         /* This chip reports checksum status differently */
                         if (hw->flags & SKY2_HW_NEW_LE) {
-                                if (sky2->rx_csum &&
+                                if ((sky2->flags & SKY2_FLAG_RX_CHECKSUM) &&
                                     (le->css & (CSS_ISIPV4 | CSS_ISIPV6)) &&
                                     (le->css & CSS_TCPUDPCSOK))
                                         skb->ip_summed = CHECKSUM_UNNECESSARY;
@@ -2480,7 +2488,7 @@ static int sky2_status_intr(struct sky2_hw *hw, int to_do, u16 idx)
                         /* fall through */
 #endif
                 case OP_RXCHKS:
-                        if (!sky2->rx_csum)
+                        if (!(sky2->flags & SKY2_FLAG_RX_CHECKSUM))
                                 break;
 
                         /* If this happens then driver assuming wrong format */
@@ -2505,7 +2513,8 @@ static int sky2_status_intr(struct sky2_hw *hw, int to_do, u16 idx)
                                 printk(KERN_NOTICE PFX "%s: hardware receive "
                                        "checksum problem (status = %#x)\n",
                                        dev->name, status);
-                                sky2->rx_csum = 0;
+                                sky2->flags &= ~SKY2_FLAG_RX_CHECKSUM;
+
                                 sky2_write32(sky2->hw,
                                              Q_ADDR(rxqaddr[port], Q_CSR),
                                              BMU_DIS_RX_CHKSUM);
@@ -3206,7 +3215,8 @@ static int sky2_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
         }
 
         ecmd->advertising = sky2->advertising;
-        ecmd->autoneg = sky2->autoneg;
+        ecmd->autoneg = (sky2->flags & SKY2_FLAG_AUTO_SPEED)
+                ? AUTONEG_ENABLE : AUTONEG_DISABLE;
         ecmd->duplex = sky2->duplex;
         return 0;
 }
@@ -3218,6 +3228,7 @@ static int sky2_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
         u32 supported = sky2_supported_modes(hw);
 
         if (ecmd->autoneg == AUTONEG_ENABLE) {
+                sky2->flags |= SKY2_FLAG_AUTO_SPEED;
                 ecmd->advertising = supported;
                 sky2->duplex = -1;
                 sky2->speed = -1;
@@ -3259,9 +3270,9 @@ static int sky2_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
 
                 sky2->speed = ecmd->speed;
                 sky2->duplex = ecmd->duplex;
+                sky2->flags &= ~SKY2_FLAG_AUTO_SPEED;
         }
 
-        sky2->autoneg = ecmd->autoneg;
         sky2->advertising = ecmd->advertising;
 
         if (netif_running(dev)) {
@@ -3331,14 +3342,17 @@ static u32 sky2_get_rx_csum(struct net_device *dev)
 {
         struct sky2_port *sky2 = netdev_priv(dev);
 
-        return sky2->rx_csum;
+        return !!(sky2->flags & SKY2_FLAG_RX_CHECKSUM);
 }
 
 static int sky2_set_rx_csum(struct net_device *dev, u32 data)
 {
         struct sky2_port *sky2 = netdev_priv(dev);
 
-        sky2->rx_csum = data;
+        if (data)
+                sky2->flags |= SKY2_FLAG_RX_CHECKSUM;
+        else
+                sky2->flags &= ~SKY2_FLAG_RX_CHECKSUM;
 
         sky2_write32(sky2->hw, Q_ADDR(rxqaddr[sky2->port], Q_CSR),
                      data ? BMU_ENA_RX_CHKSUM : BMU_DIS_RX_CHKSUM);
@@ -3356,7 +3370,7 @@ static int sky2_nway_reset(struct net_device *dev)
 {
         struct sky2_port *sky2 = netdev_priv(dev);
 
-        if (!netif_running(dev) || sky2->autoneg != AUTONEG_ENABLE)
+        if (!netif_running(dev) || !(sky2->flags & SKY2_FLAG_AUTO_SPEED))
                 return -EINVAL;
 
         sky2_phy_reinit(sky2);
@@ -3596,7 +3610,8 @@ static void sky2_get_pauseparam(struct net_device *dev,
                 ecmd->tx_pause = ecmd->rx_pause = 1;
         }
 
-        ecmd->autoneg = sky2->autoneg;
+        ecmd->autoneg = (sky2->flags & SKY2_FLAG_AUTO_PAUSE)
+                ? AUTONEG_ENABLE : AUTONEG_DISABLE;
 }
 
 static int sky2_set_pauseparam(struct net_device *dev,
@@ -3604,7 +3619,11 @@ static int sky2_set_pauseparam(struct net_device *dev,
 {
         struct sky2_port *sky2 = netdev_priv(dev);
 
-        sky2->autoneg = ecmd->autoneg;
+        if (ecmd->autoneg == AUTONEG_ENABLE)
+                sky2->flags |= SKY2_FLAG_AUTO_PAUSE;
+        else
+                sky2->flags &= ~SKY2_FLAG_AUTO_PAUSE;
+
         sky2->flow_mode = sky2_flow(ecmd->rx_pause, ecmd->tx_pause);
 
         if (netif_running(dev))
@@ -4294,13 +4313,15 @@ static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
         sky2->msg_enable = netif_msg_init(debug, default_msg);
 
         /* Auto speed and flow control */
-        sky2->autoneg = AUTONEG_ENABLE;
+        sky2->flags = SKY2_FLAG_AUTO_SPEED | SKY2_FLAG_AUTO_PAUSE;
+        if (hw->chip_id != CHIP_ID_YUKON_XL)
+                sky2->flags |= SKY2_FLAG_RX_CHECKSUM;
+
         sky2->flow_mode = FC_BOTH;
 
         sky2->duplex = -1;
         sky2->speed = -1;
         sky2->advertising = sky2_supported_modes(hw);
-        sky2->rx_csum = (hw->chip_id != CHIP_ID_YUKON_XL);
         sky2->wol = wol;
 
         spin_lock_init(&sky2->phy_lock);