From 5afa0a9cfb79556f45c02957e71a2ac48a5bb6a1 Mon Sep 17 00:00:00 2001 From: "shemminger@osdl.org" Date: Tue, 27 Sep 2005 15:03:00 -0700 Subject: [PATCH] sky2: explicit set power state Add better power management, and power down the chip on device removal Signed-off-by: Stephen Hemminger Signed-off-by: Jeff Garzik --- drivers/net/sky2.c | 156 +++++++++++++++++++++++++++++++++++++---------------- 1 file changed, 111 insertions(+), 45 deletions(-) (limited to 'drivers/net/sky2.c') diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 6d9c1db8896..1d00cdcdaa6 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -175,6 +175,91 @@ ready: return gma_read16(hw, port, GM_SMI_DATA); } +static int sky2_set_power_state(struct sky2_hw *hw, pci_power_t state) +{ + u16 power_control; + u32 reg1; + int vaux; + int ret = 0; + + pr_debug("sky2_set_power_state %d\n", state); + sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON); + + pci_read_config_word(hw->pdev, hw->pm_cap + PCI_PM_PMC, &power_control); + vaux = (sky2_read8(hw, B0_CTST) & Y2_VAUX_AVAIL) && + (power_control & PCI_PM_CAP_PME_D3cold); + + pci_read_config_word(hw->pdev, hw->pm_cap + PCI_PM_CTRL, &power_control); + + power_control |= PCI_PM_CTRL_PME_STATUS; + power_control &= ~(PCI_PM_CTRL_STATE_MASK); + + switch (state) { + case PCI_D0: + /* switch power to VCC (WA for VAUX problem) */ + sky2_write8(hw, B0_POWER_CTRL, + PC_VAUX_ENA | PC_VCC_ENA | PC_VAUX_OFF | PC_VCC_ON); + + /* disable Core Clock Division, */ + sky2_write32(hw, B2_Y2_CLK_CTRL, Y2_CLK_DIV_DIS); + + if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1) + /* enable bits are inverted */ + sky2_write8(hw, B2_Y2_CLK_GATE, + Y2_PCI_CLK_LNK1_DIS | Y2_COR_CLK_LNK1_DIS | + Y2_CLK_GAT_LNK1_DIS | Y2_PCI_CLK_LNK2_DIS | + Y2_COR_CLK_LNK2_DIS | Y2_CLK_GAT_LNK2_DIS); + else + sky2_write8(hw, B2_Y2_CLK_GATE, 0); + + /* Turn off phy power saving */ + pci_read_config_dword(hw->pdev, PCI_DEV_REG1, ®1); + reg1 &= ~(PCI_Y2_PHY1_POWD | PCI_Y2_PHY2_POWD); + + /* looks like this xl is back asswards .. */ + if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1) { + reg1 |= PCI_Y2_PHY1_COMA; + if (hw->ports > 1) + reg1 |= PCI_Y2_PHY2_COMA; + } + pci_write_config_dword(hw->pdev, PCI_DEV_REG1, reg1); + break; + + case PCI_D3hot: + case PCI_D3cold: + /* Turn on phy power saving */ + pci_read_config_dword(hw->pdev, PCI_DEV_REG1, ®1); + if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1) + reg1 &= ~(PCI_Y2_PHY1_POWD | PCI_Y2_PHY2_POWD); + else + reg1 |= (PCI_Y2_PHY1_POWD | PCI_Y2_PHY2_POWD); + pci_write_config_dword(hw->pdev, PCI_DEV_REG1, reg1); + + if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1) + sky2_write8(hw, B2_Y2_CLK_GATE, 0); + else + /* enable bits are inverted */ + sky2_write8(hw, B2_Y2_CLK_GATE, + Y2_PCI_CLK_LNK1_DIS | Y2_COR_CLK_LNK1_DIS | + Y2_CLK_GAT_LNK1_DIS | Y2_PCI_CLK_LNK2_DIS | + Y2_COR_CLK_LNK2_DIS | Y2_CLK_GAT_LNK2_DIS); + + /* switch power to VAUX */ + if (vaux && state != PCI_D3cold) + sky2_write8(hw, B0_POWER_CTRL, + (PC_VAUX_ENA | PC_VCC_ENA | + PC_VAUX_ON | PC_VCC_OFF)); + break; + default: + printk(KERN_ERR PFX "Unknown power state %d\n", state); + ret = -1; + } + + pci_write_config_byte(hw->pdev, hw->pm_cap + PCI_PM_CTRL, power_control); + sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF); + return ret; +} + static void sky2_phy_reset(struct sky2_hw *hw, unsigned port) { u16 reg; @@ -1869,7 +1954,7 @@ static inline u32 sky2_us2clk(const struct sky2_hw *hw, u32 us) static int sky2_reset(struct sky2_hw *hw) { - u32 ctst, power; + u32 ctst; u16 status; u8 t8, pmd_type; int i; @@ -1927,33 +2012,7 @@ static int sky2_reset(struct sky2_hw *hw) } hw->chip_rev = (sky2_read8(hw, B2_MAC_CFG) & CFG_CHIP_R_MSK) >> 4; - /* switch power to VCC (WA for VAUX problem) */ - sky2_write8(hw, B0_POWER_CTRL, - PC_VAUX_ENA | PC_VCC_ENA | PC_VAUX_OFF | PC_VCC_ON); - - /* disable Core Clock Division, */ - sky2_write32(hw, B2_Y2_CLK_CTRL, Y2_CLK_DIV_DIS); - - if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1) - /* enable bits are inverted */ - sky2_write8(hw, B2_Y2_CLK_GATE, - Y2_PCI_CLK_LNK1_DIS | Y2_COR_CLK_LNK1_DIS | - Y2_CLK_GAT_LNK1_DIS | Y2_PCI_CLK_LNK2_DIS | - Y2_COR_CLK_LNK2_DIS | Y2_CLK_GAT_LNK2_DIS); - else - sky2_write8(hw, B2_Y2_CLK_GATE, 0); - - /* Turn off phy power saving */ - pci_read_config_dword(hw->pdev, PCI_DEV_REG1, &power); - power &= ~(PCI_Y2_PHY1_POWD | PCI_Y2_PHY2_POWD); - - /* looks like this xl is back asswards .. */ - if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1) { - power |= PCI_Y2_PHY1_COMA; - if (hw->ports > 1) - power |= PCI_Y2_PHY2_COMA; - } - pci_write_config_dword(hw->pdev, PCI_DEV_REG1, power); + sky2_set_power_state(hw, PCI_D0); for (i = 0; i < hw->ports; i++) { sky2_write8(hw, SK_REG(i, GMAC_LINK_CTRL), GMLC_RST_SET); @@ -2714,7 +2773,7 @@ static int __devinit sky2_probe(struct pci_dev *pdev, { struct net_device *dev, *dev1 = NULL; struct sky2_hw *hw; - int err, using_dac = 0; + int err, pm_cap, using_dac = 0; err = pci_enable_device(pdev); if (err) { @@ -2732,6 +2791,15 @@ static int __devinit sky2_probe(struct pci_dev *pdev, pci_set_master(pdev); + /* Find power-management capability. */ + pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM); + if (pm_cap == 0) { + printk(KERN_ERR PFX "Cannot find PowerManagement capability, " + "aborting.\n"); + err = -EIO; + goto err_out_free_regions; + } + if (sizeof(dma_addr_t) > sizeof(u32)) { err = pci_set_dma_mask(pdev, DMA_64BIT_MASK); if (!err) @@ -2775,6 +2843,7 @@ static int __devinit sky2_probe(struct pci_dev *pdev, pci_name(pdev)); goto err_out_free_hw; } + hw->pm_cap = pm_cap; err = sky2_reset(hw); if (err) @@ -2861,8 +2930,10 @@ static void __devexit sky2_remove(struct pci_dev *pdev) unregister_netdev(dev0); sky2_write32(hw, B0_IMSK, 0); + sky2_set_power_state(hw, PCI_D3hot); sky2_write16(hw, B0_Y2LED, LED_STAT_OFF); sky2_write8(hw, B0_CTST, CS_RST_SET); + sky2_read8(hw, B0_CTST); free_irq(pdev->irq, hw); pci_free_consistent(pdev, STATUS_LE_BYTES, hw->st_le, hw->st_dma); @@ -2874,6 +2945,7 @@ static void __devexit sky2_remove(struct pci_dev *pdev) free_netdev(dev0); iounmap(hw->regs); kfree(hw); + pci_set_drvdata(pdev, NULL); } @@ -2881,28 +2953,21 @@ static void __devexit sky2_remove(struct pci_dev *pdev) static int sky2_suspend(struct pci_dev *pdev, pm_message_t state) { struct sky2_hw *hw = pci_get_drvdata(pdev); - int i, wol = 0; + int i; for (i = 0; i < 2; i++) { struct net_device *dev = hw->dev[i]; if (dev) { - struct sky2_port *sky2 = netdev_priv(dev); - if (netif_running(dev)) { - netif_carrier_off(dev); - sky2_down(dev); - } + if (!netif_running(dev)) + continue; + + sky2_down(dev); netif_device_detach(dev); - wol |= sky2->wol; } } - pci_save_state(pdev); - pci_enable_wake(pdev, pci_choose_state(pdev, state), wol); - pci_disable_device(pdev); - pci_set_power_state(pdev, pci_choose_state(pdev, state)); - - return 0; + return sky2_set_power_state(hw, pci_choose_state(pdev, state)); } static int sky2_resume(struct pci_dev *pdev) @@ -2910,18 +2975,19 @@ static int sky2_resume(struct pci_dev *pdev) struct sky2_hw *hw = pci_get_drvdata(pdev); int i; - pci_set_power_state(pdev, PCI_D0); pci_restore_state(pdev); pci_enable_wake(pdev, PCI_D0, 0); + sky2_set_power_state(hw, PCI_D0); sky2_reset(hw); for (i = 0; i < 2; i++) { struct net_device *dev = hw->dev[i]; if (dev) { - netif_device_attach(dev); - if (netif_running(dev)) + if (netif_running(dev)) { + netif_device_attach(dev); sky2_up(dev); + } } } return 0; -- cgit v1.2.3