sky2: revert config space change

Submitted by stephen hemminger on Jan. 25, 2010, 4:46 a.m.

Details

Message ID 20100124204606.2760d34e@nehalam
State Accepted
Delegated to: David Miller
Headers show

Commit Message

stephen hemminger Jan. 25, 2010, 4:46 a.m.
Obviously, this register had some other impact that is causing
the regression.  Either it is masking some other access or needs
to be reset in some path.

Either, way it is best to just revert the change for 2.6.33


This reverts commit 166a0fd4c788ec7f10ca8194ec6d526afa12db75.
---
 drivers/net/sky2.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

Comments

David Miller Jan. 25, 2010, 6:36 a.m.
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Sun, 24 Jan 2010 20:46:06 -0800

> Obviously, this register had some other impact that is causing
> the regression.  Either it is masking some other access or needs
> to be reset in some path.
> 
> Either, way it is best to just revert the change for 2.6.33
> 
> 
> This reverts commit 166a0fd4c788ec7f10ca8194ec6d526afa12db75.

I'll apply this, thanks Stephen.
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Patch hide | download patch | download mbox

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index f8f50f7..64b441c 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -644,6 +644,7 @@  static void sky2_phy_power_up(struct sky2_hw *hw, unsigned port)
 {
 	u32 reg1;
 
+	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
 	reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
 	reg1 &= ~phy_power[port];
 
@@ -651,6 +652,7 @@  static void sky2_phy_power_up(struct sky2_hw *hw, unsigned port)
 		reg1 |= coma_mode[port];
 
 	sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
+	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
 	sky2_pci_read32(hw, PCI_DEV_REG1);
 
 	if (hw->chip_id == CHIP_ID_YUKON_FE)
@@ -707,9 +709,11 @@  static void sky2_phy_power_down(struct sky2_hw *hw, unsigned port)
 		gm_phy_write(hw, port, PHY_MARV_CTRL, PHY_CT_PDOWN);
 	}
 
+	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
 	reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
 	reg1 |= phy_power[port];		/* set PHY to PowerDown/COMA Mode */
 	sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
+	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
 }
 
 /* Force a renegotiation */
@@ -2149,7 +2153,9 @@  static void sky2_qlink_intr(struct sky2_hw *hw)
 
 	/* reset PHY Link Detect */
 	phy = sky2_pci_read16(hw, PSM_CONFIG_REG4);
+	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
 	sky2_pci_write16(hw, PSM_CONFIG_REG4, phy | 1);
+	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
 
 	sky2_link_up(sky2);
 }
@@ -2640,6 +2646,7 @@  static void sky2_hw_intr(struct sky2_hw *hw)
 	if (status & (Y2_IS_MST_ERR | Y2_IS_IRQ_STAT)) {
 		u16 pci_err;
 
+		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
 		pci_err = sky2_pci_read16(hw, PCI_STATUS);
 		if (net_ratelimit())
 			dev_err(&pdev->dev, "PCI hardware error (0x%x)\n",
@@ -2647,12 +2654,14 @@  static void sky2_hw_intr(struct sky2_hw *hw)
 
 		sky2_pci_write16(hw, PCI_STATUS,
 				      pci_err | PCI_STATUS_ERROR_BITS);
+		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
 	}
 
 	if (status & Y2_IS_PCI_EXP) {
 		/* PCI-Express uncorrectable Error occurred */
 		u32 err;
 
+		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
 		err = sky2_read32(hw, Y2_CFG_AER + PCI_ERR_UNCOR_STATUS);
 		sky2_write32(hw, Y2_CFG_AER + PCI_ERR_UNCOR_STATUS,
 			     0xfffffffful);
@@ -2660,6 +2669,7 @@  static void sky2_hw_intr(struct sky2_hw *hw)
 			dev_err(&pdev->dev, "PCI Express error (0x%x)\n", err);
 
 		sky2_read32(hw, Y2_CFG_AER + PCI_ERR_UNCOR_STATUS);
+		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
 	}
 
 	if (status & Y2_HWE_L1_MASK)
@@ -3038,6 +3048,7 @@  static void sky2_reset(struct sky2_hw *hw)
 	}
 
 	sky2_power_on(hw);
+	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
 
 	for (i = 0; i < hw->ports; i++) {
 		sky2_write8(hw, SK_REG(i, GMAC_LINK_CTRL), GMLC_RST_SET);
@@ -3074,6 +3085,7 @@  static void sky2_reset(struct sky2_hw *hw)
 		reg <<= PSM_CONFIG_REG4_TIMER_PHY_LINK_DETECT_BASE;
 
 		/* reset PHY Link Detect */
+		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
 		sky2_pci_write16(hw, PSM_CONFIG_REG4,
 				 reg | PSM_CONFIG_REG4_RST_PHY_LINK_DETECT);
 		sky2_pci_write16(hw, PSM_CONFIG_REG4, reg);
@@ -3091,6 +3103,7 @@  static void sky2_reset(struct sky2_hw *hw)
 			/* restore the PCIe Link Control register */
 			sky2_pci_write16(hw, cap + PCI_EXP_LNKCTL, reg);
 		}
+		sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
 
 		/* re-enable PEX PM in PEX PHY debug reg. 8 (clear bit 12) */
 		sky2_write32(hw, Y2_PEX_PHY_DATA, PEX_DB_ACCESS | (0x08UL << 16));