gianfar: Add magic packet and suspend/resume support.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 120 insertions, 2 deletions

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 25bdd0832df5..36f229ff52f2 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -143,6 +143,9 @@ static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, int l
 static void gfar_vlan_rx_register(struct net_device *netdev,
                                 struct vlan_group *grp);
 void gfar_halt(struct net_device *dev);
+#ifdef CONFIG_PM
+static void gfar_halt_nodisable(struct net_device *dev);
+#endif
 void gfar_start(struct net_device *dev);
 static void gfar_clear_exact_match(struct net_device *dev);
 static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr);
@@ -216,6 +219,7 @@ static int gfar_probe(struct platform_device *pdev)
 
         spin_lock_init(&priv->txlock);
         spin_lock_init(&priv->rxlock);
+        spin_lock_init(&priv->bflock);
 
         platform_set_drvdata(pdev, dev);
 
@@ -393,6 +397,103 @@ static int gfar_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_PM
+static int gfar_suspend(struct platform_device *pdev, pm_message_t state)
+{
+        struct net_device *dev = platform_get_drvdata(pdev);
+        struct gfar_private *priv = netdev_priv(dev);
+        unsigned long flags;
+        u32 tempval;
+
+        int magic_packet = priv->wol_en &&
+                (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
+
+        netif_device_detach(dev);
+
+        if (netif_running(dev)) {
+                spin_lock_irqsave(&priv->txlock, flags);
+                spin_lock(&priv->rxlock);
+
+                gfar_halt_nodisable(dev);
+
+                /* Disable Tx, and Rx if wake-on-LAN is disabled. */
+                tempval = gfar_read(&priv->regs->maccfg1);
+
+                tempval &= ~MACCFG1_TX_EN;
+
+                if (!magic_packet)
+                        tempval &= ~MACCFG1_RX_EN;
+
+                gfar_write(&priv->regs->maccfg1, tempval);
+
+                spin_unlock(&priv->rxlock);
+                spin_unlock_irqrestore(&priv->txlock, flags);
+
+#ifdef CONFIG_GFAR_NAPI
+                napi_disable(&priv->napi);
+#endif
+
+                if (magic_packet) {
+                        /* Enable interrupt on Magic Packet */
+                        gfar_write(&priv->regs->imask, IMASK_MAG);
+
+                        /* Enable Magic Packet mode */
+                        tempval = gfar_read(&priv->regs->maccfg2);
+                        tempval |= MACCFG2_MPEN;
+                        gfar_write(&priv->regs->maccfg2, tempval);
+                } else {
+                        phy_stop(priv->phydev);
+                }
+        }
+
+        return 0;
+}
+
+static int gfar_resume(struct platform_device *pdev)
+{
+        struct net_device *dev = platform_get_drvdata(pdev);
+        struct gfar_private *priv = netdev_priv(dev);
+        unsigned long flags;
+        u32 tempval;
+        int magic_packet = priv->wol_en &&
+                (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
+
+        if (!netif_running(dev)) {
+                netif_device_attach(dev);
+                return 0;
+        }
+
+        if (!magic_packet && priv->phydev)
+                phy_start(priv->phydev);
+
+        /* Disable Magic Packet mode, in case something
+         * else woke us up.
+         */
+
+        spin_lock_irqsave(&priv->txlock, flags);
+        spin_lock(&priv->rxlock);
+
+        tempval = gfar_read(&priv->regs->maccfg2);
+        tempval &= ~MACCFG2_MPEN;
+        gfar_write(&priv->regs->maccfg2, tempval);
+
+        gfar_start(dev);
+
+        spin_unlock(&priv->rxlock);
+        spin_unlock_irqrestore(&priv->txlock, flags);
+
+        netif_device_attach(dev);
+
+#ifdef CONFIG_GFAR_NAPI
+        napi_enable(&priv->napi);
+#endif
+
+        return 0;
+}
+#else
+#define gfar_suspend NULL
+#define gfar_resume NULL
+#endif
 
 /* Reads the controller's registers to determine what interface
  * connects it to the PHY.
@@ -549,8 +650,9 @@ static void init_registers(struct net_device *dev)
 }
 
 
+#ifdef CONFIG_PM
 /* Halt the receive and transmit queues */
-void gfar_halt(struct net_device *dev)
+static void gfar_halt_nodisable(struct net_device *dev)
 {
         struct gfar_private *priv = netdev_priv(dev);
         struct gfar __iomem *regs = priv->regs;
@@ -573,6 +675,15 @@ void gfar_halt(struct net_device *dev)
                          (IEVENT_GRSC | IEVENT_GTSC)))
                         cpu_relax();
         }
+}
+#endif
+
+/* Halt the receive and transmit queues */
+void gfar_halt(struct net_device *dev)
+{
+        struct gfar_private *priv = netdev_priv(dev);
+        struct gfar __iomem *regs = priv->regs;
+        u32 tempval;
 
         /* Disable Rx and Tx */
         tempval = gfar_read(&regs->maccfg1);
@@ -1969,7 +2080,12 @@ static irqreturn_t gfar_error(int irq, void *dev_id)
         u32 events = gfar_read(&priv->regs->ievent);
 
         /* Clear IEVENT */
-        gfar_write(&priv->regs->ievent, IEVENT_ERR_MASK);
+        gfar_write(&priv->regs->ievent, events & IEVENT_ERR_MASK);
+
+        /* Magic Packet is not an error. */
+        if ((priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
+            (events & IEVENT_MAG))
+                events &= ~IEVENT_MAG;
 
         /* Hmm... */
         if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv))
@@ -2042,6 +2158,8 @@ MODULE_ALIAS("platform:fsl-gianfar");
 static struct platform_driver gfar_driver = {
         .probe = gfar_probe,
         .remove = gfar_remove,
+        .suspend = gfar_suspend,
+        .resume = gfar_resume,
         .driver = {
                 .name = "fsl-gianfar",
                 .owner = THIS_MODULE,