--- /dev/null
+/*
+ * 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);
+}
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff