From 52cdf8526fe24f11d300b75458ddee017f3f4c88 Mon Sep 17 00:00:00 2001 From: Matt Carlson Date: Mon, 2 Nov 2009 14:25:06 +0000 Subject: [PATCH] tg3: Prevent a PCIe tx glitch This patch prevents a PCIe tx glitch by allowing the transmitter to go to a low power state. Signed-off-by: Matt Carlson Reviewed-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/tg3.c | 24 ++++++++++++++++++++++++ drivers/net/tg3.h | 26 +++++++++++++++++++++++++- 2 files changed, 49 insertions(+), 1 deletion(-) diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 1c53250e400..53a193e0d45 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -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 && diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h index 40501cb3b35..530c36b23e8 100644 --- a/drivers/net/tg3.h +++ b/drivers/net/tg3.h @@ -1953,10 +1953,34 @@ #define NIC_SRAM_MBUF_POOL_BASE5705 0x00010000 #define NIC_SRAM_MBUF_POOL_SIZE5705 0x0000e000 + /* Currently this is fixed. */ +#define TG3_PHY_PCIE_ADDR 0x00 #define TG3_PHY_MII_ADDR 0x01 -/* Tigon3 specific PHY MII registers. */ + +/*** Tigon3 specific PHY PCIE registers. ***/ + +#define TG3_PCIEPHY_BLOCK_ADDR 0x1f +#define TG3_PCIEPHY_XGXS_BLK1 0x0801 +#define TG3_PCIEPHY_TXB_BLK 0x0861 +#define TG3_PCIEPHY_BLOCK_SHIFT 4 + +/* TG3_PCIEPHY_TXB_BLK */ +#define TG3_PCIEPHY_TX0CTRL1 0x15 +#define TG3_PCIEPHY_TX0CTRL1_TXOCM 0x0003 +#define TG3_PCIEPHY_TX0CTRL1_RDCTL 0x0008 +#define TG3_PCIEPHY_TX0CTRL1_TXCMV 0x0030 +#define TG3_PCIEPHY_TX0CTRL1_TKSEL 0x0040 +#define TG3_PCIEPHY_TX0CTRL1_NB_EN 0x0400 + +/* TG3_PCIEPHY_XGXS_BLK1 */ +#define TG3_PCIEPHY_PWRMGMT4 0x1a +#define TG3_PCIEPHY_PWRMGMT4_L1PLLPD_EN 0x0038 +#define TG3_PCIEPHY_PWRMGMT4_LOWPWR_EN 0x4000 + + +/*** Tigon3 specific PHY MII registers. ***/ #define TG3_BMCR_SPEED1000 0x0040 #define MII_TG3_CTRL 0x09 /* 1000-baseT control register */ -- 2.41.0