diff options
| author | Ed Swierk <eswierk@aristanetworks.com> | 2009-06-02 00:19:52 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-06-02 00:19:52 -0700 |
| commit | 5a9a8e32ebe269c71d8d3e78f9435fe7729f38e9 (patch) | |
| tree | 37d22a060fd62528d028cba40b2278c289736cea /drivers/net | |
| parent | fc23ffe075365d2f21b1046048ad0d342bbb41be (diff) | |
| download | talos-obmc-linux-5a9a8e32ebe269c71d8d3e78f9435fe7729f38e9.tar.gz talos-obmc-linux-5a9a8e32ebe269c71d8d3e78f9435fe7729f38e9.zip | |
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')
| -rw-r--r-- | drivers/net/forcedeth.c | 15 |
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 { }; static int phy_cross = NV_CROSSOVER_DETECTION_DISABLED; +/* + * Power down phy when interface is down (persists through reboot; + * older Linux and other OSes may not power it up again) + */ +static int phy_power_down = 0; + static inline struct fe_priv *get_nvpriv(struct net_device *dev) { return netdev_priv(dev); @@ -1485,7 +1491,10 @@ static int phy_init(struct net_device *dev) /* restart auto negotiation, power down phy */ mii_control = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ); - mii_control |= (BMCR_ANRESTART | BMCR_ANENABLE | BMCR_PDOWN); + mii_control |= (BMCR_ANRESTART | BMCR_ANENABLE); + if (phy_power_down) { + mii_control |= BMCR_PDOWN; + } if (mii_rw(dev, np->phyaddr, MII_BMCR, mii_control)) { return PHY_ERROR; } @@ -5513,7 +5522,7 @@ static int nv_close(struct net_device *dev) nv_drain_rxtx(dev); - if (np->wolenabled) { + if (np->wolenabled || !phy_power_down) { writel(NVREG_PFF_ALWAYS|NVREG_PFF_MYADDR, base + NvRegPacketFilterFlags); nv_start_rx(dev); } else { @@ -6367,6 +6376,8 @@ module_param(dma_64bit, int, 0); MODULE_PARM_DESC(dma_64bit, "High DMA is enabled by setting to 1 and disabled by setting to 0."); module_param(phy_cross, int, 0); MODULE_PARM_DESC(phy_cross, "Phy crossover detection for Realtek 8201 phy is enabled by setting to 1 and disabled by setting to 0."); +module_param(phy_power_down, int, 0); +MODULE_PARM_DESC(phy_power_down, "Power down phy and disable link when interface is down (1), or leave phy powered up (0)."); MODULE_AUTHOR("Manfred Spraul <manfred@colorfullife.com>"); MODULE_DESCRIPTION("Reverse Engineered nForce ethernet driver"); |
