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tsec: Wait for auto-negotiation to complete without link 

Previously, waiting for auto-negotiation would only occur if a valid
link had been detected.  Problems arose when attempting to use a
tsec immediately after bootup but before link was achieved, eg:
=> dhcp
Auto-neg error, defaulting to 10BT/HD
eTSEC1: No link.
Auto-neg error, defaulting to 10BT/HD
eTSEC2: No link.
=>

With this patch applied the same operation as above resulted in:
=> dhcp
Waiting for PHY auto negotiation to complete. done
Enet starting in 1000BT/FD
Speed: 1000, full duplex

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
This commit is contained in:
Peter Tyser 2009-02-04 15:14:05 -06:00 committed by Ben Warren
parent 477fa6378f
commit b1e849f220
1 changed files with 9 additions and 10 deletions
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19
drivers/net/tsec.c
View File

@ -356,8 +356,8 @@ uint mii_cr_init(uint mii_reg, struct tsec_private * priv)
return MIIM_CR_INIT; return MIIM_CR_INIT;
} }
/* Parse the status register for link, and then do /*
* auto-negotiation * Wait for auto-negotiation to complete, then determine link
*/ */
uint mii_parse_sr(uint mii_reg, struct tsec_private * priv) uint mii_parse_sr(uint mii_reg, struct tsec_private * priv)
{ {
@ -366,8 +366,7 @@ uint mii_parse_sr(uint mii_reg, struct tsec_private * priv)
* (ie - we're capable and it's not done) * (ie - we're capable and it's not done)
*/ */
mii_reg = read_phy_reg(priv, MIIM_STATUS); mii_reg = read_phy_reg(priv, MIIM_STATUS);
if ((mii_reg & MIIM_STATUS_LINK) && (mii_reg & PHY_BMSR_AUTN_ABLE) if ((mii_reg & PHY_BMSR_AUTN_ABLE) && !(mii_reg & PHY_BMSR_AUTN_COMP)) {
&& !(mii_reg & PHY_BMSR_AUTN_COMP)) {
int i = 0; int i = 0;
puts("Waiting for PHY auto negotiation to complete"); puts("Waiting for PHY auto negotiation to complete");
@ -388,15 +387,15 @@ uint mii_parse_sr(uint mii_reg, struct tsec_private * priv)
mii_reg = read_phy_reg(priv, MIIM_STATUS); mii_reg = read_phy_reg(priv, MIIM_STATUS);
} }
puts(" done\n"); puts(" done\n");
priv->link = 1;
/* Link status bit is latched low, read it again */
mii_reg = read_phy_reg(priv, MIIM_STATUS);
udelay(500000); /* another 500 ms (results in faster booting) */ udelay(500000); /* another 500 ms (results in faster booting) */
} else {
if (mii_reg & MIIM_STATUS_LINK)
priv->link = 1;
else
priv->link = 0;
} }
priv->link = mii_reg & MIIM_STATUS_LINK ? 1 : 0;
return 0; return 0;
} }