1 files changed, 206 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c b/drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c
new file mode 100644
index 000000000000..b82b7e4e06b2
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c
@@ -0,0 +1,206 @@
+/*
+ * Broadcom GENET (Gigabit Ethernet) Wake-on-LAN support
+ *
+ * Copyright (c) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define pr_fmt(fmt)                             "bcmgenet_wol: " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/clk.h>
+#include <linux/version.h>
+#include <linux/platform_device.h>
+#include <net/arp.h>
+
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/phy.h>
+
+#include "bcmgenet.h"
+
+/* ethtool function - get WOL (Wake on LAN) settings, Only Magic Packet
+ * Detection is supported through ethtool
+ */
+void bcmgenet_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+        struct bcmgenet_priv *priv = netdev_priv(dev);
+        u32 reg;
+
+        wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE;
+        wol->wolopts = priv->wolopts;
+        memset(wol->sopass, 0, sizeof(wol->sopass));
+
+        if (wol->wolopts & WAKE_MAGICSECURE) {
+                reg = bcmgenet_umac_readl(priv, UMAC_MPD_PW_MS);
+                put_unaligned_be16(reg, &wol->sopass[0]);
+                reg = bcmgenet_umac_readl(priv, UMAC_MPD_PW_LS);
+                put_unaligned_be32(reg, &wol->sopass[2]);
+        }
+}
+
+/* ethtool function - set WOL (Wake on LAN) settings.
+ * Only for magic packet detection mode.
+ */
+int bcmgenet_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+        struct bcmgenet_priv *priv = netdev_priv(dev);
+        struct device *kdev = &priv->pdev->dev;
+        u32 reg;
+
+        if (!device_can_wakeup(kdev))
+                return -ENOTSUPP;
+
+        if (wol->wolopts & ~(WAKE_MAGIC | WAKE_MAGICSECURE))
+                return -EINVAL;
+
+        if (wol->wolopts & WAKE_MAGICSECURE) {
+                bcmgenet_umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
+                                     UMAC_MPD_PW_MS);
+                bcmgenet_umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
+                                     UMAC_MPD_PW_LS);
+                reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
+                reg |= MPD_PW_EN;
+                bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
+        }
+
+        /* Flag the device and relevant IRQ as wakeup capable */
+        if (wol->wolopts) {
+                device_set_wakeup_enable(kdev, 1);
+                enable_irq_wake(priv->wol_irq);
+                priv->wol_irq_disabled = false;
+        } else {
+                device_set_wakeup_enable(kdev, 0);
+                /* Avoid unbalanced disable_irq_wake calls */
+                if (!priv->wol_irq_disabled)
+                        disable_irq_wake(priv->wol_irq);
+                priv->wol_irq_disabled = true;
+        }
+
+        priv->wolopts = wol->wolopts;
+
+        return 0;
+}
+
+static int bcmgenet_poll_wol_status(struct bcmgenet_priv *priv)
+{
+        struct net_device *dev = priv->dev;
+        int retries = 0;
+
+        while (!(bcmgenet_rbuf_readl(priv, RBUF_STATUS)
+                & RBUF_STATUS_WOL)) {
+                retries++;
+                if (retries > 5) {
+                        netdev_crit(dev, "polling wol mode timeout\n");
+                        return -ETIMEDOUT;
+                }
+                mdelay(1);
+        }
+
+        return retries;
+}
+
+int bcmgenet_wol_power_down_cfg(struct bcmgenet_priv *priv,
+                                enum bcmgenet_power_mode mode)
+{
+        struct net_device *dev = priv->dev;
+        u32 cpu_mask_clear;
+        int retries = 0;
+        u32 reg;
+
+        if (mode != GENET_POWER_WOL_MAGIC) {
+                netif_err(priv, wol, dev, "unsupported mode: %d\n", mode);
+                return -EINVAL;
+        }
+
+        /* disable RX */
+        reg = bcmgenet_umac_readl(priv, UMAC_CMD);
+        reg &= ~CMD_RX_EN;
+        bcmgenet_umac_writel(priv, reg, UMAC_CMD);
+        mdelay(10);
+
+        reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
+        reg |= MPD_EN;
+        bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
+
+        /* Do not leave UniMAC in MPD mode only */
+        retries = bcmgenet_poll_wol_status(priv);
+        if (retries < 0) {
+                reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
+                reg &= ~MPD_EN;
+                bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
+                return retries;
+        }
+
+        netif_dbg(priv, wol, dev, "MPD WOL-ready status set after %d msec\n",
+                  retries);
+
+        /* Enable CRC forward */
+        reg = bcmgenet_umac_readl(priv, UMAC_CMD);
+        priv->crc_fwd_en = 1;
+        reg |= CMD_CRC_FWD;
+
+        /* Receiver must be enabled for WOL MP detection */
+        reg |= CMD_RX_EN;
+        bcmgenet_umac_writel(priv, reg, UMAC_CMD);
+
+        if (priv->hw_params->flags & GENET_HAS_EXT) {
+                reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
+                reg &= ~EXT_ENERGY_DET_MASK;
+                bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
+        }
+
+        /* Enable the MPD interrupt */
+        cpu_mask_clear = UMAC_IRQ_MPD_R;
+
+        bcmgenet_intrl2_0_writel(priv, cpu_mask_clear, INTRL2_CPU_MASK_CLEAR);
+
+        return 0;
+}
+
+void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv,
+                               enum bcmgenet_power_mode mode)
+{
+        u32 cpu_mask_set;
+        u32 reg;
+
+        if (mode != GENET_POWER_WOL_MAGIC) {
+                netif_err(priv, wol, priv->dev, "invalid mode: %d\n", mode);
+                return;
+        }
+
+        reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
+        reg &= ~MPD_EN;
+        bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
+
+        /* Disable CRC Forward */
+        reg = bcmgenet_umac_readl(priv, UMAC_CMD);
+        reg &= ~CMD_CRC_FWD;
+        bcmgenet_umac_writel(priv, reg, UMAC_CMD);
+        priv->crc_fwd_en = 0;
+
+        /* Stop monitoring magic packet IRQ */
+        cpu_mask_set = UMAC_IRQ_MPD_R;
+
+        /* Stop monitoring magic packet IRQ */
+        bcmgenet_intrl2_0_writel(priv, cpu_mask_set, INTRL2_CPU_MASK_SET);
+}