Merge branch 'bcmgenet-next'

Florian Fainelli says:

====================
net: bcmgenet: PM and Wake-on-LAN

This patchset brings S2/S3 Power Management support to the GENET driver
as well as Wake-on-LAN using Magic Packets with or without SecureOn
passwords.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/genet/Makefile

 obj-$(CONFIG_BCMGENET) += genet.o
-genet-objs := bcmgenet.o bcmmii.o
+genet-objs := bcmgenet.o bcmmii.o bcmgenet_wol.o

drivers/net/ethernet/broadcom/genet/bcmgenet.h

@@ -456,6 +456,7 @@ struct enet_cb {
 enum bcmgenet_power_mode {
 	GENET_POWER_CABLE_SENSE = 0,
 	GENET_POWER_PASSIVE,
+	GENET_POWER_WOL_MAGIC,
 };
 
 struct bcmgenet_priv;
@@ -569,6 +570,8 @@ struct bcmgenet_priv {
 	int irq1;
 	unsigned int irq0_stat;
 	unsigned int irq1_stat;
+	int wol_irq;
+	bool wol_irq_disabled;
 
 	/* HW descriptors/checksum variables */
 	bool desc_64b_en;
@@ -583,7 +586,6 @@ struct bcmgenet_priv {
 	struct platform_device *pdev;
 
 	/* WOL */
-	unsigned long wol_enabled;
 	struct clk *clk_wol;
 	u32 wolopts;
 
@@ -625,4 +627,12 @@ int bcmgenet_mii_config(struct net_device *dev);
 void bcmgenet_mii_exit(struct net_device *dev);
 void bcmgenet_mii_reset(struct net_device *dev);
 
+/* Wake-on-LAN routines */
+void bcmgenet_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol);
+int bcmgenet_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol);
+int bcmgenet_wol_power_down_cfg(struct bcmgenet_priv *priv,
+				enum bcmgenet_power_mode mode);
+void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv,
+			       enum bcmgenet_power_mode mode);
+
 #endif /* __BCMGENET_H__ */

drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c

+/*
+ * 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);
+}