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tg3: Prevent a PCIe tx glitch

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This patch prevents a PCIe tx glitch by allowing the transmitter to go
to a low power state.

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
2009-11-02 14:25:06 +00:00
committed by David S. Miller
parent 3f0e3ad723
commit 52cdf8526f
2 changed files with 49 additions and 1 deletions
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24
drivers/net/tg3.c
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@@ -6589,6 +6589,30 @@ static int tg3_chip_reset(struct tg3 *tp)
tg3_mdio_start(tp);
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780) {
u8 phy_addr;
phy_addr = tp->phy_addr;
tp->phy_addr = TG3_PHY_PCIE_ADDR;
tg3_writephy(tp, TG3_PCIEPHY_BLOCK_ADDR,
TG3_PCIEPHY_TXB_BLK << TG3_PCIEPHY_BLOCK_SHIFT);
val = TG3_PCIEPHY_TX0CTRL1_TXOCM | TG3_PCIEPHY_TX0CTRL1_RDCTL |
TG3_PCIEPHY_TX0CTRL1_TXCMV | TG3_PCIEPHY_TX0CTRL1_TKSEL |
TG3_PCIEPHY_TX0CTRL1_NB_EN;
tg3_writephy(tp, TG3_PCIEPHY_TX0CTRL1, val);
udelay(10);
tg3_writephy(tp, TG3_PCIEPHY_BLOCK_ADDR,
TG3_PCIEPHY_XGXS_BLK1 << TG3_PCIEPHY_BLOCK_SHIFT);
val = TG3_PCIEPHY_PWRMGMT4_LOWPWR_EN |
TG3_PCIEPHY_PWRMGMT4_L1PLLPD_EN;
tg3_writephy(tp, TG3_PCIEPHY_PWRMGMT4, val);
udelay(10);
tp->phy_addr = phy_addr;
}
if ((tp->tg3_flags2 & TG3_FLG2_PCI_EXPRESS) &&
tp->pci_chip_rev_id != CHIPREV_ID_5750_A0 &&
GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5785 &&