2 * Broadcom GENET (Gigabit Ethernet) Wake-on-LAN support
4 * Copyright (c) 2014 Broadcom Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #define pr_fmt(fmt) "bcmgenet_wol: " fmt
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/sched.h>
16 #include <linux/types.h>
17 #include <linux/interrupt.h>
18 #include <linux/string.h>
19 #include <linux/init.h>
20 #include <linux/errno.h>
21 #include <linux/delay.h>
23 #include <linux/clk.h>
24 #include <linux/version.h>
25 #include <linux/platform_device.h>
28 #include <linux/mii.h>
29 #include <linux/ethtool.h>
30 #include <linux/netdevice.h>
31 #include <linux/inetdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/skbuff.h>
36 #include <linux/ipv6.h>
37 #include <linux/phy.h>
41 /* ethtool function - get WOL (Wake on LAN) settings, Only Magic Packet
42 * Detection is supported through ethtool
44 void bcmgenet_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
46 struct bcmgenet_priv *priv = netdev_priv(dev);
49 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE;
50 wol->wolopts = priv->wolopts;
51 memset(wol->sopass, 0, sizeof(wol->sopass));
53 if (wol->wolopts & WAKE_MAGICSECURE) {
54 reg = bcmgenet_umac_readl(priv, UMAC_MPD_PW_MS);
55 put_unaligned_be16(reg, &wol->sopass[0]);
56 reg = bcmgenet_umac_readl(priv, UMAC_MPD_PW_LS);
57 put_unaligned_be32(reg, &wol->sopass[2]);
61 /* ethtool function - set WOL (Wake on LAN) settings.
62 * Only for magic packet detection mode.
64 int bcmgenet_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
66 struct bcmgenet_priv *priv = netdev_priv(dev);
67 struct device *kdev = &priv->pdev->dev;
70 if (!device_can_wakeup(kdev))
73 if (wol->wolopts & ~(WAKE_MAGIC | WAKE_MAGICSECURE))
76 if (wol->wolopts & WAKE_MAGICSECURE) {
77 bcmgenet_umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
79 bcmgenet_umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
81 reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
83 bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
86 /* Flag the device and relevant IRQ as wakeup capable */
88 device_set_wakeup_enable(kdev, 1);
89 /* Avoid unbalanced enable_irq_wake calls */
90 if (priv->wol_irq_disabled)
91 enable_irq_wake(priv->wol_irq);
92 priv->wol_irq_disabled = false;
94 device_set_wakeup_enable(kdev, 0);
95 /* Avoid unbalanced disable_irq_wake calls */
96 if (!priv->wol_irq_disabled)
97 disable_irq_wake(priv->wol_irq);
98 priv->wol_irq_disabled = true;
101 priv->wolopts = wol->wolopts;
106 static int bcmgenet_poll_wol_status(struct bcmgenet_priv *priv)
108 struct net_device *dev = priv->dev;
111 while (!(bcmgenet_rbuf_readl(priv, RBUF_STATUS)
112 & RBUF_STATUS_WOL)) {
115 netdev_crit(dev, "polling wol mode timeout\n");
124 int bcmgenet_wol_power_down_cfg(struct bcmgenet_priv *priv,
125 enum bcmgenet_power_mode mode)
127 struct net_device *dev = priv->dev;
132 if (mode != GENET_POWER_WOL_MAGIC) {
133 netif_err(priv, wol, dev, "unsupported mode: %d\n", mode);
138 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
140 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
143 reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
145 bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
147 /* Do not leave UniMAC in MPD mode only */
148 retries = bcmgenet_poll_wol_status(priv);
150 reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
152 bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
156 netif_dbg(priv, wol, dev, "MPD WOL-ready status set after %d msec\n",
159 /* Enable CRC forward */
160 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
161 priv->crc_fwd_en = 1;
164 /* Receiver must be enabled for WOL MP detection */
166 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
168 if (priv->hw_params->flags & GENET_HAS_EXT) {
169 reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
170 reg &= ~EXT_ENERGY_DET_MASK;
171 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
174 /* Enable the MPD interrupt */
175 cpu_mask_clear = UMAC_IRQ_MPD_R;
177 bcmgenet_intrl2_0_writel(priv, cpu_mask_clear, INTRL2_CPU_MASK_CLEAR);
182 void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv,
183 enum bcmgenet_power_mode mode)
188 if (mode != GENET_POWER_WOL_MAGIC) {
189 netif_err(priv, wol, priv->dev, "invalid mode: %d\n", mode);
193 reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
195 bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
197 /* Disable CRC Forward */
198 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
200 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
201 priv->crc_fwd_en = 0;
203 /* Stop monitoring magic packet IRQ */
204 cpu_mask_set = UMAC_IRQ_MPD_R;
206 /* Stop monitoring magic packet IRQ */
207 bcmgenet_intrl2_0_writel(priv, cpu_mask_set, INTRL2_CPU_MASK_SET);