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>

3 files changed, 169 insertions, 6 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,
diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index 27f37c81e52c..5ee518a8782b 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -168,6 +168,7 @@ extern const char gfar_driver_version[];
 #define MACCFG2_GMII            0x00000200
 #define MACCFG2_HUGEFRAME       0x00000020
 #define MACCFG2_LENGTHCHECK     0x00000010
+#define MACCFG2_MPEN            0x00000008
 
 #define ECNTRL_INIT_SETTINGS    0x00001000
 #define ECNTRL_TBI_MODE         0x00000020
@@ -240,6 +241,7 @@ extern const char gfar_driver_version[];
 #define IEVENT_CRL              0x00020000
 #define IEVENT_XFUN             0x00010000
 #define IEVENT_RXB0             0x00008000
+#define IEVENT_MAG              0x00000800
 #define IEVENT_GRSC             0x00000100
 #define IEVENT_RXF0             0x00000080
 #define IEVENT_FIR              0x00000008
@@ -252,7 +254,8 @@ extern const char gfar_driver_version[];
 #define IEVENT_ERR_MASK         \
 (IEVENT_RXC | IEVENT_BSY | IEVENT_EBERR | IEVENT_MSRO | \
  IEVENT_BABT | IEVENT_TXC | IEVENT_TXE | IEVENT_LC \
- | IEVENT_CRL | IEVENT_XFUN | IEVENT_DPE | IEVENT_PERR)
+ | IEVENT_CRL | IEVENT_XFUN | IEVENT_DPE | IEVENT_PERR \
+ | IEVENT_MAG)
 
 #define IMASK_INIT_CLEAR        0x00000000
 #define IMASK_BABR              0x80000000
@@ -270,6 +273,7 @@ extern const char gfar_driver_version[];
 #define IMASK_CRL               0x00020000
 #define IMASK_XFUN              0x00010000
 #define IMASK_RXB0              0x00008000
+#define IMASK_MAG               0x00000800
 #define IMASK_GTSC              0x00000100
 #define IMASK_RXFEN0            0x00000080
 #define IMASK_FIR               0x00000008
@@ -737,10 +741,14 @@ struct gfar_private {
         unsigned int fifo_starve;
         unsigned int fifo_starve_off;
 
+        /* Bitfield update lock */
+        spinlock_t bflock;
+
         unsigned char vlan_enable:1,
                 rx_csum_enable:1,
                 extended_hash:1,
-                bd_stash_en:1;
+                bd_stash_en:1,
+                wol_en:1; /* Wake-on-LAN enabled */
         unsigned short padding;
 
         unsigned int interruptTransmit;
diff --git a/drivers/net/gianfar_ethtool.c b/drivers/net/gianfar_ethtool.c
index 6007147cc1e9..fb7d3ccc0fdc 100644
--- a/drivers/net/gianfar_ethtool.c
+++ b/drivers/net/gianfar_ethtool.c
@@ -479,14 +479,13 @@ static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rva
 static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
 {
         struct gfar_private *priv = netdev_priv(dev);
+        unsigned long flags;
         int err = 0;
 
         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
                 return -EOPNOTSUPP;
 
         if (dev->flags & IFF_UP) {
-                unsigned long flags;
-
                 /* Halt TX and RX, and process the frames which
                  * have already been received */
                 spin_lock_irqsave(&priv->txlock, flags);
@@ -502,7 +501,9 @@ static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
                 stop_gfar(dev);
         }
 
+        spin_lock_irqsave(&priv->bflock, flags);
         priv->rx_csum_enable = data;
+        spin_unlock_irqrestore(&priv->bflock, flags);
 
         if (dev->flags & IFF_UP)
                 err = startup_gfar(dev);
@@ -564,6 +565,38 @@ static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
         priv->msg_enable = data;
 }
 
+#ifdef CONFIG_PM
+static void gfar_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+        struct gfar_private *priv = netdev_priv(dev);
+
+        if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) {
+                wol->supported = WAKE_MAGIC;
+                wol->wolopts = priv->wol_en ? WAKE_MAGIC : 0;
+        } else {
+                wol->supported = wol->wolopts = 0;
+        }
+}
+
+static int gfar_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+        struct gfar_private *priv = netdev_priv(dev);
+        unsigned long flags;
+
+        if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
+            wol->wolopts != 0)
+                return -EINVAL;
+
+        if (wol->wolopts & ~WAKE_MAGIC)
+                return -EINVAL;
+
+        spin_lock_irqsave(&priv->bflock, flags);
+        priv->wol_en = wol->wolopts & WAKE_MAGIC ? 1 : 0;
+        spin_unlock_irqrestore(&priv->bflock, flags);
+
+        return 0;
+}
+#endif
 
 const struct ethtool_ops gfar_ethtool_ops = {
         .get_settings = gfar_gsettings,
@@ -585,4 +618,8 @@ const struct ethtool_ops gfar_ethtool_ops = {
         .set_tx_csum = gfar_set_tx_csum,
         .get_msglevel = gfar_get_msglevel,
         .set_msglevel = gfar_set_msglevel,
+#ifdef CONFIG_PM
+        .get_wol = gfar_get_wol,
+        .set_wol = gfar_set_wol,
+#endif
 };