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Fix a bug with the ael1006 PHY. The bug shows up as persistent but incomplete

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packet loss, of between 10-30%. The fix is to put the PHY into
and take it out of local loopback mode when resetting the interface.

Obtained from:	Chelsio Inc.
MFC after:	3 days
This commit is contained in:
George V. Neville-Neil 2008-12-04 20:32:53 +00:00
parent 78bc7eec0d
commit 9036240993
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=185620
1 changed files with 10 additions and 0 deletions
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10
sys/dev/cxgb/common/cxgb_ael1002.c
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@ -205,6 +205,16 @@ static int ael1006_reset(struct cphy *phy, int wait)
t3_write_reg(phy->adapter, A_T3DBG_GPIO_EN, gpio_out);
msleep(125);
t3_phy_reset(phy, MDIO_DEV_PMA_PMD, wait);
/* Phy loopback work around for ael1006 */
/* Soft reset phy by toggling loopback */
msleep(125);
/* Put phy into local loopback */
t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR, 0, 1);
msleep(125);
/* Take phy out of local loopback */
t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR, 1, 0);
return 0;
}