diff options
| author | trem <tremyfr@yahoo.fr> | 2012-12-04 08:52:10 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-12-07 12:48:00 -0500 |
| commit | 6ded7cd605502eff7341bbd912ebc90c3674c764 (patch) | |
| tree | 70a120c195ffe3e61900de404b54b8a53756030e /drivers/net/phy/smsc.c | |
| parent | 4bd9b0fffb193d2e288f67f81821af32df8d4349 (diff) | |
| download | linux-6ded7cd605502eff7341bbd912ebc90c3674c764.tar.gz linux-6ded7cd605502eff7341bbd912ebc90c3674c764.tar.bz2 linux-6ded7cd605502eff7341bbd912ebc90c3674c764.zip | |
net: phy: smsc: force all capable mode if the phy is started in powerdown mode
A SMSC PHY in power down mode can't be used.
If a SMSC PHY is in this mode in the config_init
stage, the mode "all capable" is set. So the PHY
could then be used.
Signed-off-by: Philippe Reynes <tremyfr@yahoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/smsc.c')
| -rw-r--r-- | drivers/net/phy/smsc.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c index 16dceed29d8c..ef883e3048c0 100644 --- a/drivers/net/phy/smsc.c +++ b/drivers/net/phy/smsc.c @@ -43,7 +43,31 @@ static int smsc_phy_ack_interrupt(struct phy_device *phydev) static int smsc_phy_config_init(struct phy_device *phydev) { - int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS); + int rc = phy_read(phydev, MII_LAN83C185_SPECIAL_MODES); + if (rc < 0) + return rc; + + /* If the SMSC PHY is in power down mode, then set it + * in all capable mode before using it. + */ + if ((rc & MII_LAN83C185_MODE_MASK) == MII_LAN83C185_MODE_POWERDOWN) { + int timeout = 50000; + + /* set "all capable" mode and reset the phy */ + rc |= MII_LAN83C185_MODE_ALL; + phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc); + phy_write(phydev, MII_BMCR, BMCR_RESET); + + /* wait end of reset (max 500 ms) */ + do { + udelay(10); + if (timeout-- == 0) + return -1; + rc = phy_read(phydev, MII_BMCR); + } while (rc & BMCR_RESET); + } + + rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS); if (rc < 0) return rc; |