Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 2 | /* |
| 3 | * Broadcom GENET (Gigabit Ethernet) Wake-on-LAN support |
| 4 | * |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 5 | * Copyright (c) 2014-2017 Broadcom |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #define pr_fmt(fmt) "bcmgenet_wol: " fmt |
| 9 | |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/sched.h> |
| 13 | #include <linux/types.h> |
| 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/string.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/pm.h> |
| 20 | #include <linux/clk.h> |
| 21 | #include <linux/version.h> |
| 22 | #include <linux/platform_device.h> |
| 23 | #include <net/arp.h> |
| 24 | |
| 25 | #include <linux/mii.h> |
| 26 | #include <linux/ethtool.h> |
| 27 | #include <linux/netdevice.h> |
| 28 | #include <linux/inetdevice.h> |
| 29 | #include <linux/etherdevice.h> |
| 30 | #include <linux/skbuff.h> |
| 31 | #include <linux/in.h> |
| 32 | #include <linux/ip.h> |
| 33 | #include <linux/ipv6.h> |
| 34 | #include <linux/phy.h> |
| 35 | |
| 36 | #include "bcmgenet.h" |
| 37 | |
| 38 | /* ethtool function - get WOL (Wake on LAN) settings, Only Magic Packet |
| 39 | * Detection is supported through ethtool |
| 40 | */ |
| 41 | void bcmgenet_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) |
| 42 | { |
| 43 | struct bcmgenet_priv *priv = netdev_priv(dev); |
| 44 | |
| 45 | wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE; |
| 46 | wol->wolopts = priv->wolopts; |
| 47 | memset(wol->sopass, 0, sizeof(wol->sopass)); |
| 48 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 49 | if (wol->wolopts & WAKE_MAGICSECURE) |
| 50 | memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass)); |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | /* ethtool function - set WOL (Wake on LAN) settings. |
| 54 | * Only for magic packet detection mode. |
| 55 | */ |
| 56 | int bcmgenet_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) |
| 57 | { |
| 58 | struct bcmgenet_priv *priv = netdev_priv(dev); |
| 59 | struct device *kdev = &priv->pdev->dev; |
| 60 | |
| 61 | if (!device_can_wakeup(kdev)) |
| 62 | return -ENOTSUPP; |
| 63 | |
| 64 | if (wol->wolopts & ~(WAKE_MAGIC | WAKE_MAGICSECURE)) |
| 65 | return -EINVAL; |
| 66 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 67 | if (wol->wolopts & WAKE_MAGICSECURE) |
| 68 | memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass)); |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 69 | |
| 70 | /* Flag the device and relevant IRQ as wakeup capable */ |
| 71 | if (wol->wolopts) { |
| 72 | device_set_wakeup_enable(kdev, 1); |
| 73 | /* Avoid unbalanced enable_irq_wake calls */ |
| 74 | if (priv->wol_irq_disabled) |
| 75 | enable_irq_wake(priv->wol_irq); |
| 76 | priv->wol_irq_disabled = false; |
| 77 | } else { |
| 78 | device_set_wakeup_enable(kdev, 0); |
| 79 | /* Avoid unbalanced disable_irq_wake calls */ |
| 80 | if (!priv->wol_irq_disabled) |
| 81 | disable_irq_wake(priv->wol_irq); |
| 82 | priv->wol_irq_disabled = true; |
| 83 | } |
| 84 | |
| 85 | priv->wolopts = wol->wolopts; |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static int bcmgenet_poll_wol_status(struct bcmgenet_priv *priv) |
| 91 | { |
| 92 | struct net_device *dev = priv->dev; |
| 93 | int retries = 0; |
| 94 | |
| 95 | while (!(bcmgenet_rbuf_readl(priv, RBUF_STATUS) |
| 96 | & RBUF_STATUS_WOL)) { |
| 97 | retries++; |
| 98 | if (retries > 5) { |
| 99 | netdev_crit(dev, "polling wol mode timeout\n"); |
| 100 | return -ETIMEDOUT; |
| 101 | } |
| 102 | mdelay(1); |
| 103 | } |
| 104 | |
| 105 | return retries; |
| 106 | } |
| 107 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 108 | static void bcmgenet_set_mpd_password(struct bcmgenet_priv *priv) |
| 109 | { |
| 110 | bcmgenet_umac_writel(priv, get_unaligned_be16(&priv->sopass[0]), |
| 111 | UMAC_MPD_PW_MS); |
| 112 | bcmgenet_umac_writel(priv, get_unaligned_be32(&priv->sopass[2]), |
| 113 | UMAC_MPD_PW_LS); |
| 114 | } |
| 115 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 116 | int bcmgenet_wol_power_down_cfg(struct bcmgenet_priv *priv, |
| 117 | enum bcmgenet_power_mode mode) |
| 118 | { |
| 119 | struct net_device *dev = priv->dev; |
| 120 | int retries = 0; |
| 121 | u32 reg; |
| 122 | |
| 123 | if (mode != GENET_POWER_WOL_MAGIC) { |
| 124 | netif_err(priv, wol, dev, "unsupported mode: %d\n", mode); |
| 125 | return -EINVAL; |
| 126 | } |
| 127 | |
| 128 | /* disable RX */ |
| 129 | reg = bcmgenet_umac_readl(priv, UMAC_CMD); |
| 130 | reg &= ~CMD_RX_EN; |
| 131 | bcmgenet_umac_writel(priv, reg, UMAC_CMD); |
| 132 | mdelay(10); |
| 133 | |
| 134 | reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL); |
| 135 | reg |= MPD_EN; |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 136 | if (priv->wolopts & WAKE_MAGICSECURE) { |
| 137 | bcmgenet_set_mpd_password(priv); |
| 138 | reg |= MPD_PW_EN; |
| 139 | } |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 140 | bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL); |
| 141 | |
| 142 | /* Do not leave UniMAC in MPD mode only */ |
| 143 | retries = bcmgenet_poll_wol_status(priv); |
| 144 | if (retries < 0) { |
| 145 | reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL); |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 146 | reg &= ~(MPD_EN | MPD_PW_EN); |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 147 | bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL); |
| 148 | return retries; |
| 149 | } |
| 150 | |
| 151 | netif_dbg(priv, wol, dev, "MPD WOL-ready status set after %d msec\n", |
| 152 | retries); |
| 153 | |
| 154 | /* Enable CRC forward */ |
| 155 | reg = bcmgenet_umac_readl(priv, UMAC_CMD); |
| 156 | priv->crc_fwd_en = 1; |
| 157 | reg |= CMD_CRC_FWD; |
| 158 | |
| 159 | /* Receiver must be enabled for WOL MP detection */ |
| 160 | reg |= CMD_RX_EN; |
| 161 | bcmgenet_umac_writel(priv, reg, UMAC_CMD); |
| 162 | |
Googler | b48fa91 | 2023-03-17 12:40:29 +0530 | [diff] [blame^] | 163 | if (priv->hw_params->flags & GENET_HAS_EXT) { |
| 164 | reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT); |
| 165 | reg &= ~EXT_ENERGY_DET_MASK; |
| 166 | bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT); |
| 167 | } |
| 168 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 169 | return 0; |
| 170 | } |
| 171 | |
| 172 | void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv, |
| 173 | enum bcmgenet_power_mode mode) |
| 174 | { |
| 175 | u32 reg; |
| 176 | |
| 177 | if (mode != GENET_POWER_WOL_MAGIC) { |
| 178 | netif_err(priv, wol, priv->dev, "invalid mode: %d\n", mode); |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL); |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 183 | if (!(reg & MPD_EN)) |
| 184 | return; /* already powered up so skip the rest */ |
| 185 | reg &= ~(MPD_EN | MPD_PW_EN); |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 186 | bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL); |
| 187 | |
| 188 | /* Disable CRC Forward */ |
| 189 | reg = bcmgenet_umac_readl(priv, UMAC_CMD); |
| 190 | reg &= ~CMD_CRC_FWD; |
| 191 | bcmgenet_umac_writel(priv, reg, UMAC_CMD); |
| 192 | priv->crc_fwd_en = 0; |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 193 | } |