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authorSteve Glendinning <steve.glendinning@shawell.net>2012-04-30 09:56:56 +0200
committerDavid S. Miller <davem@davemloft.net>2012-05-01 03:52:42 +0200
commit2f3a081ea2f63cd5b3e549a0040c760d87483f99 (patch)
tree8875061f829c8adcbc1e1649e055cd450ea87096 /drivers/net
parentsmsc75xx: declare smsc75xx's MII as GMII capable (diff)
downloadlinux-2f3a081ea2f63cd5b3e549a0040c760d87483f99.tar.xz
linux-2f3a081ea2f63cd5b3e549a0040c760d87483f99.zip
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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/usb/smsc75xx.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c
index ae23d85a973a..00103a8c5e04 100644
--- a/drivers/net/usb/smsc75xx.c
+++ b/drivers/net/usb/smsc75xx.c
@@ -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);