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tg3: Fix AC131 loopback test errors for 5785 

The AC131 does not enable the forced transmit clock settings
immediately.  The workaround is to read the register again to get the
setting to take effect.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2010-02-12 14:47:12 +00:00 committed by David S. Miller
parent c88734054e
commit 1061b7c564
2 changed files with 9 additions and 2 deletions
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8
drivers/net/tg3.c
View File

@ -10822,8 +10822,12 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
mac_mode = tp->mac_mode & ~MAC_MODE_PORT_MODE_MASK;
if (tp->tg3_flags3 & TG3_FLG3_PHY_IS_FET) {
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
tg3_writephy(tp, MII_TG3_FET_PTEST, 0x1800);
tg3_writephy(tp, MII_TG3_FET_PTEST,
MII_TG3_FET_PTEST_FRC_TX_LINK |
MII_TG3_FET_PTEST_FRC_TX_LOCK);
/* The write needs to be flushed for the AC131 */
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785)
tg3_readphy(tp, MII_TG3_FET_PTEST, &val);
mac_mode |= MAC_MODE_PORT_MODE_MII;
} else
mac_mode |= MAC_MODE_PORT_MODE_GMII;

3
drivers/net/tg3.h
View File

@ -2112,6 +2112,9 @@
/* Fast Ethernet Tranceiver definitions */
#define MII_TG3_FET_PTEST 0x17
#define MII_TG3_FET_PTEST_FRC_TX_LINK 0x1000
#define MII_TG3_FET_PTEST_FRC_TX_LOCK 0x0800
#define MII_TG3_FET_TEST 0x1f
#define MII_TG3_FET_SHADOW_EN 0x0080