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net: systemport: Fix WoL with password after deep sleep 

Broadcom STB chips support a deep sleep mode where all register
contents are lost. Because we were stashing the MagicPacket password
into some of these registers a suspend into that deep sleep then a
resumption would not lead to being able to wake-up from MagicPacket with
password again.

Fix this by keeping a software copy of the password and program it
during suspend.

Fixes: 83e82f4c70 ("net: systemport: add Wake-on-LAN support")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2019-02-01 13:23:38 -08:00 committed by David S. Miller
parent 2348bb3117
commit 8dfb8d2cce
2 changed files with 12 additions and 15 deletions
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25
drivers/net/ethernet/broadcom/bcmsysport.c
View File

@ -520,7 +520,6 @@ static void bcm_sysport_get_wol(struct net_device *dev,
struct ethtool_wolinfo *wol)
{
struct bcm_sysport_priv *priv = netdev_priv(dev);
u32 reg;
wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
wol->wolopts = priv->wolopts;
@ -528,11 +527,7 @@ static void bcm_sysport_get_wol(struct net_device *dev,
if (!(priv->wolopts & WAKE_MAGICSECURE))
return;
/* Return the programmed SecureOn password */
reg = umac_readl(priv, UMAC_PSW_MS);
put_unaligned_be16(reg, &wol->sopass[0]);
reg = umac_readl(priv, UMAC_PSW_LS);
put_unaligned_be32(reg, &wol->sopass[2]);
memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
}
static int bcm_sysport_set_wol(struct net_device *dev,
@ -548,13 +543,8 @@ static int bcm_sysport_set_wol(struct net_device *dev,
if (wol->wolopts & ~supported)
return -EINVAL;
/* Program the SecureOn password */
if (wol->wolopts & WAKE_MAGICSECURE) {
umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
UMAC_PSW_MS);
umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
UMAC_PSW_LS);
}
if (wol->wolopts & WAKE_MAGICSECURE)
memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
/* Flag the device and relevant IRQ as wakeup capable */
if (wol->wolopts) {
@ -2649,13 +2639,18 @@ static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
unsigned int index, i = 0;
u32 reg;
/* Password has already been programmed */
reg = umac_readl(priv, UMAC_MPD_CTRL);
if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
reg |= MPD_EN;
reg &= ~PSW_EN;
if (priv->wolopts & WAKE_MAGICSECURE)
if (priv->wolopts & WAKE_MAGICSECURE) {
/* Program the SecureOn password */
umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
UMAC_PSW_MS);
umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
UMAC_PSW_LS);
reg |= PSW_EN;
}
umac_writel(priv, reg, UMAC_MPD_CTRL);
if (priv->wolopts & WAKE_FILTER) {

2
drivers/net/ethernet/broadcom/bcmsysport.h
View File

@ -12,6 +12,7 @@
#define __BCM_SYSPORT_H
#include <linux/bitmap.h>
#include <linux/ethtool.h>
#include <linux/if_vlan.h>
#include <linux/net_dim.h>
@ -778,6 +779,7 @@ struct bcm_sysport_priv {
unsigned int crc_fwd:1;
u16 rev;
u32 wolopts;
u8 sopass[SOPASS_MAX];
unsigned int wol_irq_disabled:1;
/* MIB related fields */