diff options
Diffstat (limited to 'drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c | 206 |
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); +} |
