skge: WOL support

Add WOL support for Yukon chipsets in skge device.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 125 insertions, 35 deletions

diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index 9135602e157d..7e687ca4789a 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -132,18 +132,93 @@ static void skge_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 }
 
 /* Wake on Lan only supported on Yukon chips with rev 1 or above */
-static int wol_supported(const struct skge_hw *hw)
+static u32 wol_supported(const struct skge_hw *hw)
 {
-        return !((hw->chip_id == CHIP_ID_GENESIS ||
-                  (hw->chip_id == CHIP_ID_YUKON && hw->chip_rev == 0)));
+        if (hw->chip_id == CHIP_ID_YUKON && hw->chip_rev != 0)
+                return WAKE_MAGIC | WAKE_PHY;
+        else
+                return 0;
+}
+
+static u32 pci_wake_enabled(struct pci_dev *dev)
+{
+        int pm = pci_find_capability(dev, PCI_CAP_ID_PM);
+        u16 value;
+
+        /* If device doesn't support PM Capabilities, but request is to disable
+         * wake events, it's a nop; otherwise fail */
+        if (!pm)
+                return 0;
+
+        pci_read_config_word(dev, pm + PCI_PM_PMC, &value);
+
+        value &= PCI_PM_CAP_PME_MASK;
+        value >>= ffs(PCI_PM_CAP_PME_MASK) - 1;   /* First bit of mask */
+
+        return value != 0;
+}
+
+static void skge_wol_init(struct skge_port *skge)
+{
+        struct skge_hw *hw = skge->hw;
+        int port = skge->port;
+        enum pause_control save_mode;
+        u32 ctrl;
+
+        /* Bring hardware out of reset */
+        skge_write16(hw, B0_CTST, CS_RST_CLR);
+        skge_write16(hw, SK_REG(port, GMAC_LINK_CTRL), GMLC_RST_CLR);
+
+        skge_write8(hw, SK_REG(port, GPHY_CTRL), GPC_RST_CLR);
+        skge_write8(hw, SK_REG(port, GMAC_CTRL), GMC_RST_CLR);
+
+        /* Force to 10/100 skge_reset will re-enable on resume   */
+        save_mode = skge->flow_control;
+        skge->flow_control = FLOW_MODE_SYMMETRIC;
+
+        ctrl = skge->advertising;
+        skge->advertising &= ~(ADVERTISED_1000baseT_Half|ADVERTISED_1000baseT_Full);
+
+        skge_phy_reset(skge);
+
+        skge->flow_control = save_mode;
+        skge->advertising = ctrl;
+
+        /* Set GMAC to no flow control and auto update for speed/duplex */
+        gma_write16(hw, port, GM_GP_CTRL,
+                    GM_GPCR_FC_TX_DIS|GM_GPCR_TX_ENA|GM_GPCR_RX_ENA|
+                    GM_GPCR_DUP_FULL|GM_GPCR_FC_RX_DIS|GM_GPCR_AU_FCT_DIS);
+
+        /* Set WOL address */
+        memcpy_toio(hw->regs + WOL_REGS(port, WOL_MAC_ADDR),
+                    skge->netdev->dev_addr, ETH_ALEN);
+
+        /* Turn on appropriate WOL control bits */
+        skge_write16(hw, WOL_REGS(port, WOL_CTRL_STAT), WOL_CTL_CLEAR_RESULT);
+        ctrl = 0;
+        if (skge->wol & WAKE_PHY)
+                ctrl |= WOL_CTL_ENA_PME_ON_LINK_CHG|WOL_CTL_ENA_LINK_CHG_UNIT;
+        else
+                ctrl |= WOL_CTL_DIS_PME_ON_LINK_CHG|WOL_CTL_DIS_LINK_CHG_UNIT;
+
+        if (skge->wol & WAKE_MAGIC)
+                ctrl |= WOL_CTL_ENA_PME_ON_MAGIC_PKT|WOL_CTL_ENA_MAGIC_PKT_UNIT;
+        else
+                ctrl |= WOL_CTL_DIS_PME_ON_MAGIC_PKT|WOL_CTL_DIS_MAGIC_PKT_UNIT;;
+
+        ctrl |= WOL_CTL_DIS_PME_ON_PATTERN|WOL_CTL_DIS_PATTERN_UNIT;
+        skge_write16(hw, WOL_REGS(port, WOL_CTRL_STAT), ctrl);
+
+        /* block receiver */
+        skge_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_SET);
 }
 
 static void skge_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 {
         struct skge_port *skge = netdev_priv(dev);
 
-        wol->supported = wol_supported(skge->hw) ? WAKE_MAGIC : 0;
-        wol->wolopts = skge->wol ? WAKE_MAGIC : 0;
+        wol->supported = wol_supported(skge->hw);
+        wol->wolopts = skge->wol;
 }
 
 static int skge_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
@@ -151,23 +226,12 @@ static int skge_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
         struct skge_port *skge = netdev_priv(dev);
         struct skge_hw *hw = skge->hw;
 
-        if (wol->wolopts != WAKE_MAGIC && wol->wolopts != 0)
-                return -EOPNOTSUPP;
-
-        if (wol->wolopts == WAKE_MAGIC && !wol_supported(hw))
+        if (wol->wolopts & wol_supported(hw))
                 return -EOPNOTSUPP;
 
-        skge->wol = wol->wolopts == WAKE_MAGIC;
-
-        if (skge->wol) {
-                memcpy_toio(hw->regs + WOL_MAC_ADDR, dev->dev_addr, ETH_ALEN);
-
-                skge_write16(hw, WOL_CTRL_STAT,
-                             WOL_CTL_ENA_PME_ON_MAGIC_PKT |
-                             WOL_CTL_ENA_MAGIC_PKT_UNIT);
-        } else
-                skge_write16(hw, WOL_CTRL_STAT, WOL_CTL_DEFAULT);
-
+        skge->wol = wol->wolopts;
+        if (!netif_running(dev))
+                skge_wol_init(skge);
         return 0;
 }
 
@@ -3456,6 +3520,7 @@ static struct net_device *skge_devinit(struct skge_hw *hw, int port,
         skge->duplex = -1;
         skge->speed = -1;
         skge->advertising = skge_supported_modes(hw);
+        skge->wol = pci_wake_enabled(hw->pdev) ? wol_supported(hw) : 0;
 
         hw->dev[port] = dev;
 
@@ -3654,28 +3719,46 @@ static void __devexit skge_remove(struct pci_dev *pdev)
 }
 
 #ifdef CONFIG_PM
+static int vaux_avail(struct pci_dev *pdev)
+{
+        int pm_cap;
+
+        pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM);
+        if (pm_cap) {
+                u16 ctl;
+                pci_read_config_word(pdev, pm_cap + PCI_PM_PMC, &ctl);
+                if (ctl & PCI_PM_CAP_AUX_POWER)
+                        return 1;
+        }
+        return 0;
+}
+
+
 static int skge_suspend(struct pci_dev *pdev, pm_message_t state)
 {
         struct skge_hw *hw  = pci_get_drvdata(pdev);
-        int i, wol = 0;
+        int i, err, wol = 0;
+
+        err = pci_save_state(pdev);
+        if (err)
+                return err;
 
-        pci_save_state(pdev);
         for (i = 0; i < hw->ports; i++) {
                 struct net_device *dev = hw->dev[i];
+                struct skge_port *skge = netdev_priv(dev);
 
-                if (netif_running(dev)) {
-                        struct skge_port *skge = netdev_priv(dev);
+                if (netif_running(dev))
+                        skge_down(dev);
+                if (skge->wol)
+                        skge_wol_init(skge);
 
-                        netif_carrier_off(dev);
-                        if (skge->wol)
-                                netif_stop_queue(dev);
-                        else
-                                skge_down(dev);
-                        wol |= skge->wol;
-                }
-                netif_device_detach(dev);
+                wol |= skge->wol;
         }
 
+        if (wol && vaux_avail(pdev))
+                skge_write8(hw, B0_POWER_CTRL,
+                            PC_VAUX_ENA | PC_VCC_ENA | PC_VAUX_ON | PC_VCC_OFF);
+
         skge_write32(hw, B0_IMSK, 0);
         pci_enable_wake(pdev, pci_choose_state(pdev, state), wol);
         pci_set_power_state(pdev, pci_choose_state(pdev, state));
@@ -3688,8 +3771,14 @@ static int skge_resume(struct pci_dev *pdev)
         struct skge_hw *hw  = pci_get_drvdata(pdev);
         int i, err;
 
-        pci_set_power_state(pdev, PCI_D0);
-        pci_restore_state(pdev);
+        err = pci_set_power_state(pdev, PCI_D0);
+        if (err)
+                goto out;
+
+        err = pci_restore_state(pdev);
+        if (err)
+                goto out;
+
         pci_enable_wake(pdev, PCI_D0, 0);
 
         err = skge_reset(hw);
@@ -3699,7 +3788,6 @@ static int skge_resume(struct pci_dev *pdev)
         for (i = 0; i < hw->ports; i++) {
                 struct net_device *dev = hw->dev[i];
 
-                netif_device_attach(dev);
                 if (netif_running(dev)) {
                         err = skge_up(dev);
 
diff --git a/drivers/net/skge.h b/drivers/net/skge.h
index f6223c533c01..17b1b479dff5 100644
--- a/drivers/net/skge.h
+++ b/drivers/net/skge.h
@@ -876,11 +876,13 @@ enum {
         WOL_PATT_CNT_0  = 0x0f38,/* 32 bit      WOL Pattern Counter 3..0 */
         WOL_PATT_CNT_4  = 0x0f3c,/* 24 bit      WOL Pattern Counter 6..4 */
 };
+#define WOL_REGS(port, x)       (x + (port)*0x80)
 
 enum {
         WOL_PATT_RAM_1  = 0x1000,/*  WOL Pattern RAM Link 1 */
         WOL_PATT_RAM_2  = 0x1400,/*  WOL Pattern RAM Link 2 */
 };
+#define WOL_PATT_RAM_BASE(port) (WOL_PATT_RAM_1 + (port)*0x400)
 
 enum {
         BASE_XMAC_1     = 0x2000,/* XMAC 1 registers */