netdev: bfin_mac: add support for wake-on-lan magic packets

Note that WOL works only in PM Suspend Standby Mode (Sleep Mode).

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 75 insertions, 4 deletions

diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index 5d962b86ee22..28f350711267 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -464,6 +464,14 @@ static int mii_probe(struct net_device *dev)
  * Ethtool support
  */
 
+/*
+ * interrupt routine for magic packet wakeup
+ */
+static irqreturn_t bfin_mac_wake_interrupt(int irq, void *dev_id)
+{
+        return IRQ_HANDLED;
+}
+
 static int
 bfin_mac_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
 {
@@ -498,11 +506,57 @@ static void bfin_mac_ethtool_getdrvinfo(struct net_device *dev,
         strcpy(info->bus_info, dev_name(&dev->dev));
 }
 
+static void bfin_mac_ethtool_getwol(struct net_device *dev,
+        struct ethtool_wolinfo *wolinfo)
+{
+        struct bfin_mac_local *lp = netdev_priv(dev);
+
+        wolinfo->supported = WAKE_MAGIC;
+        wolinfo->wolopts = lp->wol;
+}
+
+static int bfin_mac_ethtool_setwol(struct net_device *dev,
+        struct ethtool_wolinfo *wolinfo)
+{
+        struct bfin_mac_local *lp = netdev_priv(dev);
+        int rc;
+
+        if (wolinfo->wolopts & (WAKE_MAGICSECURE |
+                                WAKE_UCAST |
+                                WAKE_MCAST |
+                                WAKE_BCAST |
+                                WAKE_ARP))
+                return -EOPNOTSUPP;
+
+        lp->wol = wolinfo->wolopts;
+
+        if (lp->wol && !lp->irq_wake_requested) {
+                /* register wake irq handler */
+                rc = request_irq(IRQ_MAC_WAKEDET, bfin_mac_wake_interrupt,
+                                 IRQF_DISABLED, "EMAC_WAKE", dev);
+                if (rc)
+                        return rc;
+                lp->irq_wake_requested = true;
+        }
+
+        if (!lp->wol && lp->irq_wake_requested) {
+                free_irq(IRQ_MAC_WAKEDET, dev);
+                lp->irq_wake_requested = false;
+        }
+
+        /* Make sure the PHY driver doesn't suspend */
+        device_init_wakeup(&dev->dev, lp->wol);
+
+        return 0;
+}
+
 static const struct ethtool_ops bfin_mac_ethtool_ops = {
         .get_settings = bfin_mac_ethtool_getsettings,
         .set_settings = bfin_mac_ethtool_setsettings,
         .get_link = ethtool_op_get_link,
         .get_drvinfo = bfin_mac_ethtool_getdrvinfo,
+        .get_wol = bfin_mac_ethtool_getwol,
+        .set_wol = bfin_mac_ethtool_setwol,
 };
 
 /**************************************************************************/
@@ -1474,9 +1528,16 @@ static int __devexit bfin_mac_remove(struct platform_device *pdev)
 static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t mesg)
 {
         struct net_device *net_dev = platform_get_drvdata(pdev);
+        struct bfin_mac_local *lp = netdev_priv(net_dev);
 
-        if (netif_running(net_dev))
-                bfin_mac_close(net_dev);
+        if (lp->wol) {
+                bfin_write_EMAC_OPMODE((bfin_read_EMAC_OPMODE() & ~TE) | RE);
+                bfin_write_EMAC_WKUP_CTL(MPKE);
+                enable_irq_wake(IRQ_MAC_WAKEDET);
+        } else {
+                if (netif_running(net_dev))
+                        bfin_mac_close(net_dev);
+        }
 
         return 0;
 }
@@ -1484,9 +1545,16 @@ static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t mesg)
 static int bfin_mac_resume(struct platform_device *pdev)
 {
         struct net_device *net_dev = platform_get_drvdata(pdev);
+        struct bfin_mac_local *lp = netdev_priv(net_dev);
 
-        if (netif_running(net_dev))
-                bfin_mac_open(net_dev);
+        if (lp->wol) {
+                bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE);
+                bfin_write_EMAC_WKUP_CTL(0);
+                disable_irq_wake(IRQ_MAC_WAKEDET);
+        } else {
+                if (netif_running(net_dev))
+                        bfin_mac_open(net_dev);
+        }
 
         return 0;
 }
diff --git a/drivers/net/bfin_mac.h b/drivers/net/bfin_mac.h
index 87c454fc0319..1ae7b82ceeee 100644
--- a/drivers/net/bfin_mac.h
+++ b/drivers/net/bfin_mac.h
@@ -66,6 +66,9 @@ struct bfin_mac_local {
         unsigned char Mac[6];   /* MAC address of the board */
         spinlock_t lock;
 
+        int wol;                /* Wake On Lan */
+        int irq_wake_requested;
+
         /* MII and PHY stuffs */
         int old_link;          /* used by bf537_adjust_link */
         int old_speed;