diff options
Diffstat (limited to 'drivers/net/sky2.c')
-rw-r--r-- | drivers/net/sky2.c | 98 |
1 files changed, 92 insertions, 6 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 59cb9cd..c83406f 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -284,6 +284,86 @@ 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; @@ -2786,6 +2866,10 @@ 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: @@ -2836,6 +2920,11 @@ 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); @@ -4407,7 +4496,7 @@ 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); - pci_set_power_state(pdev, pci_choose_state(pdev, state)); + sky2_power_state(hw, pci_choose_state(pdev, state)); return 0; } @@ -4420,9 +4509,7 @@ static int sky2_resume(struct pci_dev *pdev) if (!hw) return 0; - err = pci_set_power_state(pdev, PCI_D0); - if (err) - goto out; + sky2_power_state(hw, PCI_D0); err = pci_restore_state(pdev); if (err) @@ -4490,8 +4577,7 @@ static void sky2_shutdown(struct pci_dev *pdev) pci_enable_wake(pdev, PCI_D3cold, wol); pci_disable_device(pdev); - pci_set_power_state(pdev, PCI_D3hot); - + sky2_power_state(hw, PCI_D3hot); } static struct pci_driver sky2_driver = { |