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smsc75xx: enable mac to detect speed/duplex from phy 

This patch sets the automatic speed and duplex detection bits
in MAC_CR to enable the mac to determine its speed automatically
from the phy.

Note this must be done BEFORE the receiver or transmitter is
enabled.

Signed-off-by: Stephane Fillod <fillods@users.sf.net>
Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steve Glendinning 2012-04-30 07:56:56 +00:00 committed by David S. Miller
parent c0b92e4d44
commit 2f3a081ea2
1 changed files with 8 additions and 0 deletions
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8
drivers/net/usb/smsc75xx.c
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@ -951,6 +951,14 @@ static int smsc75xx_reset(struct usbnet *dev)
ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
check_warn_return(ret, "Failed to write INT_EP_CTL: %d", ret);
/* allow mac to detect speed and duplex from phy */
ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
check_warn_return(ret, "Failed to read MAC_CR: %d", ret);
buf |= (MAC_CR_ADD | MAC_CR_ASD);
ret = smsc75xx_write_reg(dev, MAC_CR, buf);
check_warn_return(ret, "Failed to write MAC_CR: %d", ret);
ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
check_warn_return(ret, "Failed to read MAC_TX: %d", ret);