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authorStephen Hemminger <shemminger@vyatta.com>2008-08-04 13:33:37 -0700
committerJeff Garzik <jgarzik@redhat.com>2008-08-07 01:55:50 -0400
commitf71eb1a24a8cdde8d388c8f93e935aa7ac491047 (patch)
treeb5520365b42d4c26ae1f1a8c5e0a9eee81e84e7b /drivers/net/sky2.c
parenta6ef5e9d7dd6f3de4f88b68c390f0f0d7072944c (diff)
downloadop-kernel-dev-f71eb1a24a8cdde8d388c8f93e935aa7ac491047.zip
op-kernel-dev-f71eb1a24a8cdde8d388c8f93e935aa7ac491047.tar.gz
sky2: fix PM related regressions
Fix the problems reported for 2.6.27-rc1 caused by over aggressive power management. Turning clock off on PCI Express is problematic for WOL, and when doing multi-booting. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/net/sky2.c')
-rw-r--r--drivers/net/sky2.c103
1 files changed, 10 insertions, 93 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 5257cf4..7d29edc 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -275,86 +275,6 @@ static void sky2_power_aux(struct sky2_hw *hw)
PC_VAUX_ON | PC_VCC_OFF));
}
-static void sky2_power_state(struct sky2_hw *hw, pci_power_t state)
-{
- u16 power_control = sky2_pci_read16(hw, hw->pm_cap + PCI_PM_CTRL);
- int pex = pci_find_capability(hw->pdev, PCI_CAP_ID_EXP);
- u32 reg;
-
- sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
-
- switch (state) {
- case PCI_D0:
- break;
-
- case PCI_D1:
- power_control |= 1;
- break;
-
- case PCI_D2:
- power_control |= 2;
- break;
-
- case PCI_D3hot:
- case PCI_D3cold:
- power_control |= 3;
- if (hw->flags & SKY2_HW_ADV_POWER_CTL) {
- /* additional power saving measurements */
- reg = sky2_pci_read32(hw, PCI_DEV_REG4);
-
- /* set gating core clock for LTSSM in L1 state */
- reg |= P_PEX_LTSSM_STAT(P_PEX_LTSSM_L1_STAT) |
- /* auto clock gated scheme controlled by CLKREQ */
- P_ASPM_A1_MODE_SELECT |
- /* enable Gate Root Core Clock */
- P_CLK_GATE_ROOT_COR_ENA;
-
- if (pex && (hw->flags & SKY2_HW_CLK_POWER)) {
- /* enable Clock Power Management (CLKREQ) */
- u16 ctrl = sky2_pci_read16(hw, pex + PCI_EXP_DEVCTL);
-
- ctrl |= PCI_EXP_DEVCTL_AUX_PME;
- sky2_pci_write16(hw, pex + PCI_EXP_DEVCTL, ctrl);
- } else
- /* force CLKREQ Enable in Our4 (A1b only) */
- reg |= P_ASPM_FORCE_CLKREQ_ENA;
-
- /* set Mask Register for Release/Gate Clock */
- sky2_pci_write32(hw, PCI_DEV_REG5,
- P_REL_PCIE_EXIT_L1_ST | P_GAT_PCIE_ENTER_L1_ST |
- P_REL_PCIE_RX_EX_IDLE | P_GAT_PCIE_RX_EL_IDLE |
- P_REL_GPHY_LINK_UP | P_GAT_GPHY_LINK_DOWN);
- } else
- sky2_write8(hw, B28_Y2_ASF_STAT_CMD, Y2_ASF_CLK_HALT);
-
- /* put CPU into reset state */
- sky2_write8(hw, B28_Y2_ASF_STAT_CMD, HCU_CCSR_ASF_RESET);
- if (hw->chip_id == CHIP_ID_YUKON_SUPR && hw->chip_rev == CHIP_REV_YU_SU_A0)
- /* put CPU into halt state */
- sky2_write8(hw, B28_Y2_ASF_STAT_CMD, HCU_CCSR_ASF_HALTED);
-
- if (pex && !(hw->flags & SKY2_HW_RAM_BUFFER)) {
- reg = sky2_pci_read32(hw, PCI_DEV_REG1);
- /* force to PCIe L1 */
- reg |= PCI_FORCE_PEX_L1;
- sky2_pci_write32(hw, PCI_DEV_REG1, reg);
- }
- break;
-
- default:
- dev_warn(&hw->pdev->dev, PFX "Invalid power state (%d) ",
- state);
- return;
- }
-
- power_control |= PCI_PM_CTRL_PME_ENABLE;
- /* Finally, set the new power state. */
- sky2_pci_write32(hw, hw->pm_cap + PCI_PM_CTRL, power_control);
-
- sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
- sky2_pci_read32(hw, B0_CTST);
-}
-
static void sky2_gmac_reset(struct sky2_hw *hw, unsigned port)
{
u16 reg;
@@ -709,6 +629,11 @@ static void sky2_phy_power_up(struct sky2_hw *hw, unsigned 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)
+ gm_phy_write(hw, port, PHY_MARV_CTRL, PHY_CT_ANE);
+ else if (hw->flags & SKY2_HW_ADV_POWER_CTL)
+ sky2_write8(hw, SK_REG(port, GPHY_CTRL), GPC_RST_CLR);
}
static void sky2_phy_power_down(struct sky2_hw *hw, unsigned port)
@@ -2855,10 +2780,6 @@ static int __devinit sky2_init(struct sky2_hw *hw)
hw->flags = SKY2_HW_GIGABIT
| SKY2_HW_NEWER_PHY
| SKY2_HW_ADV_POWER_CTL;
-
- /* check for Rev. A1 dev 4200 */
- if (sky2_read16(hw, Q_ADDR(Q_XA1, Q_WM)) == 0)
- hw->flags |= SKY2_HW_CLK_POWER;
break;
case CHIP_ID_YUKON_EX:
@@ -2914,12 +2835,6 @@ static int __devinit sky2_init(struct sky2_hw *hw)
if (hw->pmd_type == 'L' || hw->pmd_type == 'S' || hw->pmd_type == 'P')
hw->flags |= SKY2_HW_FIBRE_PHY;
- hw->pm_cap = pci_find_capability(hw->pdev, PCI_CAP_ID_PM);
- if (hw->pm_cap == 0) {
- dev_err(&hw->pdev->dev, "cannot find PowerManagement capability\n");
- return -EIO;
- }
-
hw->ports = 1;
t8 = sky2_read8(hw, B2_Y2_HW_RES);
if ((t8 & CFG_DUAL_MAC_MSK) == CFG_DUAL_MAC_MSK) {
@@ -4512,7 +4427,7 @@ static int sky2_suspend(struct pci_dev *pdev, pm_message_t state)
pci_save_state(pdev);
pci_enable_wake(pdev, pci_choose_state(pdev, state), wol);
- sky2_power_state(hw, pci_choose_state(pdev, state));
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
return 0;
}
@@ -4525,7 +4440,9 @@ static int sky2_resume(struct pci_dev *pdev)
if (!hw)
return 0;
- sky2_power_state(hw, PCI_D0);
+ err = pci_set_power_state(pdev, PCI_D0);
+ if (err)
+ goto out;
err = pci_restore_state(pdev);
if (err)
@@ -4595,7 +4512,7 @@ static void sky2_shutdown(struct pci_dev *pdev)
pci_enable_wake(pdev, PCI_D3cold, wol);
pci_disable_device(pdev);
- sky2_power_state(hw, PCI_D3hot);
+ pci_set_power_state(pdev, PCI_D3hot);
}
static struct pci_driver sky2_driver = {
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