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tg3: Fix loopback tests 

The half-duplex bit in the MAC MODE register will be set during the
loopback test if the external link is in half-duplex mode.  This will
cause the loopback test to fail on newer devices.  This patch turns the
half-duplex bit off for the test.

Also, newer devices fail the internal phy loopback test because the phy
link takes a little while to come up.  This patch adds code to wait for
the link before proceeding with the test.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2011-01-25 15:58:52 +00:00 committed by David S. Miller
parent f746a3136a
commit 49692ca1e6
1 changed files with 12 additions and 3 deletions
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15
drivers/net/tg3.c
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@ -10845,8 +10845,9 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780)
return 0;
mac_mode = (tp->mac_mode & ~MAC_MODE_PORT_MODE_MASK) |
MAC_MODE_PORT_INT_LPBACK;
mac_mode = tp->mac_mode &
~(MAC_MODE_PORT_MODE_MASK | MAC_MODE_HALF_DUPLEX);
mac_mode |= MAC_MODE_PORT_INT_LPBACK;
if (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS))
mac_mode |= MAC_MODE_LINK_POLARITY;
if (tp->phy_flags & TG3_PHYFLG_10_100_ONLY)
@ -10868,7 +10869,8 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
tg3_writephy(tp, MII_BMCR, val);
udelay(40);
mac_mode = tp->mac_mode & ~MAC_MODE_PORT_MODE_MASK;
mac_mode = tp->mac_mode &
~(MAC_MODE_PORT_MODE_MASK | MAC_MODE_HALF_DUPLEX);
if (tp->phy_flags & TG3_PHYFLG_IS_FET) {
tg3_writephy(tp, MII_TG3_FET_PTEST,
MII_TG3_FET_PTEST_FRC_TX_LINK |
@ -10896,6 +10898,13 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
MII_TG3_EXT_CTRL_LNK3_LED_MODE);
}
tw32(MAC_MODE, mac_mode);
/* Wait for link */
for (i = 0; i < 100; i++) {
if (tr32(MAC_TX_STATUS) & TX_STATUS_LINK_UP)
break;
mdelay(1);
}
} else {
return -EINVAL;
}