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authorEd Swierk <eswierk@aristanetworks.com>2009-06-02 03:19:52 -0400
committerDavid S. Miller <davem@davemloft.net>2009-06-02 03:19:52 -0400
commit5a9a8e32ebe269c71d8d3e78f9435fe7729f38e9 (patch)
tree37d22a060fd62528d028cba40b2278c289736cea /drivers/net/forcedeth.c
parentfc23ffe075365d2f21b1046048ad0d342bbb41be (diff)
forcedeth: add phy_power_down parameter, leave phy powered up by default (v2)
Add a phy_power_down parameter to forcedeth: set to 1 to power down the phy and disable the link when an interface goes down; set to 0 to always leave the phy powered up. The phy power state persists across reboots; Windows, some BIOSes, and older versions of Linux don't bother to power up the phy again, forcing users to remove all power to get the interface working (see http://bugzilla.kernel.org/show_bug.cgi?id=13072). Leaving the phy powered on is the safest default behavior. Users accustomed to seeing the link state reflect the interface state and/or wanting to minimize power consumption can set phy_power_down=1 if compatibility with other OSes is not an issue. Signed-off-by: Ed Swierk <eswierk@aristanetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/forcedeth.c')
-rw-r--r--drivers/net/forcedeth.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index f9a846b1b92f..9f6a68fb7b45 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -897,6 +897,12 @@ enum {
897}; 897};
898static int phy_cross = NV_CROSSOVER_DETECTION_DISABLED; 898static int phy_cross = NV_CROSSOVER_DETECTION_DISABLED;
899 899
900/*
901 * Power down phy when interface is down (persists through reboot;
902 * older Linux and other OSes may not power it up again)
903 */
904static int phy_power_down = 0;
905
900static inline struct fe_priv *get_nvpriv(struct net_device *dev) 906static inline struct fe_priv *get_nvpriv(struct net_device *dev)
901{ 907{
902 return netdev_priv(dev); 908 return netdev_priv(dev);
@@ -1485,7 +1491,10 @@ static int phy_init(struct net_device *dev)
1485 1491
1486 /* restart auto negotiation, power down phy */ 1492 /* restart auto negotiation, power down phy */
1487 mii_control = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ); 1493 mii_control = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
1488 mii_control |= (BMCR_ANRESTART | BMCR_ANENABLE | BMCR_PDOWN); 1494 mii_control |= (BMCR_ANRESTART | BMCR_ANENABLE);
1495 if (phy_power_down) {
1496 mii_control |= BMCR_PDOWN;
1497 }
1489 if (mii_rw(dev, np->phyaddr, MII_BMCR, mii_control)) { 1498 if (mii_rw(dev, np->phyaddr, MII_BMCR, mii_control)) {
1490 return PHY_ERROR; 1499 return PHY_ERROR;
1491 } 1500 }
@@ -5513,7 +5522,7 @@ static int nv_close(struct net_device *dev)
5513 5522
5514 nv_drain_rxtx(dev); 5523 nv_drain_rxtx(dev);
5515 5524
5516 if (np->wolenabled) { 5525 if (np->wolenabled || !phy_power_down) {
5517 writel(NVREG_PFF_ALWAYS|NVREG_PFF_MYADDR, base + NvRegPacketFilterFlags); 5526 writel(NVREG_PFF_ALWAYS|NVREG_PFF_MYADDR, base + NvRegPacketFilterFlags);
5518 nv_start_rx(dev); 5527 nv_start_rx(dev);
5519 } else { 5528 } else {
@@ -6367,6 +6376,8 @@ module_param(dma_64bit, int, 0);
6367MODULE_PARM_DESC(dma_64bit, "High DMA is enabled by setting to 1 and disabled by setting to 0."); 6376MODULE_PARM_DESC(dma_64bit, "High DMA is enabled by setting to 1 and disabled by setting to 0.");
6368module_param(phy_cross, int, 0); 6377module_param(phy_cross, int, 0);
6369MODULE_PARM_DESC(phy_cross, "Phy crossover detection for Realtek 8201 phy is enabled by setting to 1 and disabled by setting to 0."); 6378MODULE_PARM_DESC(phy_cross, "Phy crossover detection for Realtek 8201 phy is enabled by setting to 1 and disabled by setting to 0.");
6379module_param(phy_power_down, int, 0);
6380MODULE_PARM_DESC(phy_power_down, "Power down phy and disable link when interface is down (1), or leave phy powered up (0).");
6370 6381
6371MODULE_AUTHOR("Manfred Spraul <manfred@colorfullife.com>"); 6382MODULE_AUTHOR("Manfred Spraul <manfred@colorfullife.com>");
6372MODULE_DESCRIPTION("Reverse Engineered nForce ethernet driver"); 6383MODULE_DESCRIPTION("Reverse Engineered nForce ethernet driver");