net: systemport: add Wake-on-LAN support
Support for Wake-on-LAN using Magic Packet with or without SecureOn password is implemented doing the following: - setting the password to the relevant UniMAC registers - flagging the device as a wakeup source for the system, as well as its Wake-on-LAN interrupt - prepare the hardware for entering WoL mode - enabling the MPD interrupt to wake us The Device Tree binding documentation is also reflected to specify the third optional Wake-on-LAN interrupt line. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>hifive-unleashed-5.1
Florian Fainelli
David S. Miller
parent
9d34c1cb01
commit
83e82f4c70
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@ -4,7 +4,8 @@ Required properties:
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- compatible: should be one of "brcm,systemport-v1.00" or "brcm,systemport"
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- reg: address and length of the register set for the device.
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- interrupts: interrupts for the device, first cell must be for the the rx
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interrupts, and the second cell should be for the transmit queues
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interrupts, and the second cell should be for the transmit queues. An
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optional third interrupt cell for Wake-on-LAN can be specified
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- local-mac-address: Ethernet MAC address (48 bits) of this adapter
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- phy-mode: Should be a string describing the PHY interface to the
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Ethernet switch/PHY, see Documentation/devicetree/bindings/net/ethernet.txt
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@ -384,6 +384,64 @@ static void bcm_sysport_get_stats(struct net_device *dev,
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}
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}
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static void bcm_sysport_get_wol(struct net_device *dev,
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struct ethtool_wolinfo *wol)
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{
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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u32 reg;
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wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE;
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wol->wolopts = priv->wolopts;
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if (!(priv->wolopts & WAKE_MAGICSECURE))
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return;
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/* Return the programmed SecureOn password */
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reg = umac_readl(priv, UMAC_PSW_MS);
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put_unaligned_be16(reg, &wol->sopass[0]);
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reg = umac_readl(priv, UMAC_PSW_LS);
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put_unaligned_be32(reg, &wol->sopass[2]);
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}
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static int bcm_sysport_set_wol(struct net_device *dev,
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struct ethtool_wolinfo *wol)
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{
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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struct device *kdev = &priv->pdev->dev;
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u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE;
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if (!device_can_wakeup(kdev))
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return -ENOTSUPP;
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if (wol->wolopts & ~supported)
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return -EINVAL;
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/* Program the SecureOn password */
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if (wol->wolopts & WAKE_MAGICSECURE) {
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umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
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UMAC_PSW_MS);
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umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
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UMAC_PSW_LS);
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}
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/* Flag the device and relevant IRQ as wakeup capable */
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if (wol->wolopts) {
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device_set_wakeup_enable(kdev, 1);
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enable_irq_wake(priv->wol_irq);
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priv->wol_irq_disabled = 0;
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} else {
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device_set_wakeup_enable(kdev, 0);
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/* Avoid unbalanced disable_irq_wake calls */
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if (!priv->wol_irq_disabled)
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disable_irq_wake(priv->wol_irq);
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priv->wol_irq_disabled = 1;
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}
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priv->wolopts = wol->wolopts;
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return 0;
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}
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static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
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{
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dev_kfree_skb_any(cb->skb);
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@ -692,6 +750,20 @@ static int bcm_sysport_poll(struct napi_struct *napi, int budget)
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return work_done;
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}
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static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
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{
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u32 reg;
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/* Stop monitoring MPD interrupt */
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intrl2_0_mask_set(priv, INTRL2_0_MPD);
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/* Clear the MagicPacket detection logic */
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reg = umac_readl(priv, UMAC_MPD_CTRL);
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reg &= ~MPD_EN;
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umac_writel(priv, reg, UMAC_MPD_CTRL);
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netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
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}
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/* RX and misc interrupt routine */
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static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
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@ -722,6 +794,11 @@ static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
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if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
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bcm_sysport_tx_reclaim_all(priv);
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if (priv->irq0_stat & INTRL2_0_MPD) {
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netdev_info(priv->netdev, "Wake-on-LAN interrupt!\n");
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bcm_sysport_resume_from_wol(priv);
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}
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return IRQ_HANDLED;
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}
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@ -757,6 +834,15 @@ static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
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return IRQ_HANDLED;
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}
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static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
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{
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struct bcm_sysport_priv *priv = dev_id;
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pm_wakeup_event(&priv->pdev->dev, 0);
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return IRQ_HANDLED;
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}
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static int bcm_sysport_insert_tsb(struct sk_buff *skb, struct net_device *dev)
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{
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struct sk_buff *nskb;
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@ -1507,6 +1593,8 @@ static struct ethtool_ops bcm_sysport_ethtool_ops = {
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.get_strings = bcm_sysport_get_strings,
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.get_ethtool_stats = bcm_sysport_get_stats,
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.get_sset_count = bcm_sysport_get_sset_count,
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.get_wol = bcm_sysport_get_wol,
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.set_wol = bcm_sysport_set_wol,
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};
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static const struct net_device_ops bcm_sysport_netdev_ops = {
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@ -1548,6 +1636,7 @@ static int bcm_sysport_probe(struct platform_device *pdev)
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priv->irq0 = platform_get_irq(pdev, 0);
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priv->irq1 = platform_get_irq(pdev, 1);
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priv->wol_irq = platform_get_irq(pdev, 2);
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if (priv->irq0 <= 0 || priv->irq1 <= 0) {
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dev_err(&pdev->dev, "invalid interrupts\n");
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ret = -EINVAL;
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@ -1600,6 +1689,13 @@ static int bcm_sysport_probe(struct platform_device *pdev)
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dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
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NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
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/* Request the WOL interrupt and advertise suspend if available */
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priv->wol_irq_disabled = 1;
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ret = devm_request_irq(&pdev->dev, priv->wol_irq,
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bcm_sysport_wol_isr, 0, dev->name, priv);
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if (!ret)
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device_set_wakeup_capable(&pdev->dev, 1);
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/* Set the needed headroom once and for all */
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BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
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dev->needed_headroom += sizeof(struct bcm_tsb);
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@ -1647,12 +1743,55 @@ static int bcm_sysport_remove(struct platform_device *pdev)
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}
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#ifdef CONFIG_PM_SLEEP
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static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
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{
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struct net_device *ndev = priv->netdev;
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unsigned int timeout = 1000;
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u32 reg;
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/* Password has already been programmed */
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reg = umac_readl(priv, UMAC_MPD_CTRL);
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reg |= MPD_EN;
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reg &= ~PSW_EN;
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if (priv->wolopts & WAKE_MAGICSECURE)
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reg |= PSW_EN;
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umac_writel(priv, reg, UMAC_MPD_CTRL);
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/* Make sure RBUF entered WoL mode as result */
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do {
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reg = rbuf_readl(priv, RBUF_STATUS);
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if (reg & RBUF_WOL_MODE)
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break;
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udelay(10);
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} while (timeout-- > 0);
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/* Do not leave the UniMAC RBUF matching only MPD packets */
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if (!timeout) {
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reg = umac_readl(priv, UMAC_MPD_CTRL);
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reg &= ~MPD_EN;
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umac_writel(priv, reg, UMAC_MPD_CTRL);
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netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
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return -ETIMEDOUT;
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}
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/* UniMAC receive needs to be turned on */
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umac_enable_set(priv, CMD_RX_EN, 1);
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/* Enable the interrupt wake-up source */
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intrl2_0_mask_clear(priv, INTRL2_0_MPD);
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netif_dbg(priv, wol, ndev, "entered WOL mode\n");
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return 0;
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}
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static int bcm_sysport_suspend(struct device *d)
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{
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struct net_device *dev = dev_get_drvdata(d);
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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unsigned int i;
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int ret;
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int ret = 0;
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u32 reg;
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if (!netif_running(dev))
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@ -1681,7 +1820,8 @@ static int bcm_sysport_suspend(struct device *d)
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}
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/* Flush RX pipe */
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topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
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if (!priv->wolopts)
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topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
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ret = tdma_enable_set(priv, 0);
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if (ret) {
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@ -1701,7 +1841,11 @@ static int bcm_sysport_suspend(struct device *d)
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bcm_sysport_fini_tx_ring(priv, i);
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bcm_sysport_fini_rx_ring(priv);
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return 0;
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/* Get prepared for Wake-on-LAN */
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if (device_may_wakeup(d) && priv->wolopts)
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ret = bcm_sysport_suspend_to_wol(priv);
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return ret;
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}
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static int bcm_sysport_resume(struct device *d)
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@ -1715,6 +1859,11 @@ static int bcm_sysport_resume(struct device *d)
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if (!netif_running(dev))
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return 0;
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/* We may have been suspended and never received a WOL event that
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* would turn off MPD detection, take care of that now
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*/
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bcm_sysport_resume_from_wol(priv);
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/* Initialize both hardware and software ring */
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for (i = 0; i < dev->num_tx_queues; i++) {
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ret = bcm_sysport_init_tx_ring(priv, i);
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@ -246,6 +246,15 @@ struct bcm_rsb {
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#define MIB_RX_CNT_RST (1 << 0)
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#define MIB_RUNT_CNT_RST (1 << 1)
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#define MIB_TX_CNT_RST (1 << 2)
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#define UMAC_MPD_CTRL 0x620
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#define MPD_EN (1 << 0)
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#define MSEQ_LEN_SHIFT 16
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#define MSEQ_LEN_MASK 0xff
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#define PSW_EN (1 << 27)
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#define UMAC_PSW_MS 0x624
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#define UMAC_PSW_LS 0x628
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#define UMAC_MDF_CTRL 0x650
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#define UMAC_MDF_ADDR 0x654
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@ -642,6 +651,7 @@ struct bcm_sysport_priv {
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struct platform_device *pdev;
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int irq0;
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int irq1;
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int wol_irq;
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/* Transmit rings */
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struct bcm_sysport_tx_ring tx_rings[TDMA_NUM_RINGS];
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@ -668,6 +678,8 @@ struct bcm_sysport_priv {
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unsigned int tsb_en:1;
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unsigned int crc_fwd:1;
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u16 rev;
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u32 wolopts;
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unsigned int wol_irq_disabled:1;
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/* MIB related fields */
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struct bcm_sysport_mib mib;
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