From: stephen hemminger Date: Wed, 21 Mar 2012 05:32:05 +0000 (+0000) Subject: sky2: override for PCI legacy power management X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5676cc7bfe1e388e87843f71daa229610385b41e;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git sky2: override for PCI legacy power management Some BIOS's don't setup power management correctly (what else is new) and don't allow use of PCI Express power control. Add a special exception module parameter to allow working around this issue. Based on slightly different patch by Knut Petersen. Reported-by: Arkadiusz Miskiewicz Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c index 82c2c86a1951..423a1a2a702e 100644 --- a/drivers/net/ethernet/marvell/sky2.c +++ b/drivers/net/ethernet/marvell/sky2.c @@ -95,6 +95,10 @@ static int disable_msi = 0; module_param(disable_msi, int, 0); MODULE_PARM_DESC(disable_msi, "Disable Message Signaled Interrupt (MSI)"); +static int legacy_pme = 0; +module_param(legacy_pme, int, 0); +MODULE_PARM_DESC(legacy_pme, "Legacy power management"); + static DEFINE_PCI_DEVICE_TABLE(sky2_id_table) = { { PCI_DEVICE(PCI_VENDOR_ID_SYSKONNECT, 0x9000) }, /* SK-9Sxx */ { PCI_DEVICE(PCI_VENDOR_ID_SYSKONNECT, 0x9E00) }, /* SK-9Exx */ @@ -867,6 +871,13 @@ static void sky2_wol_init(struct sky2_port *sky2) /* Disable PiG firmware */ sky2_write16(hw, B0_CTST, Y2_HW_WOL_OFF); + /* Needed by some broken BIOSes, use PCI rather than PCI-e for WOL */ + if (legacy_pme) { + u32 reg1 = sky2_pci_read32(hw, PCI_DEV_REG1); + reg1 |= PCI_Y2_PME_LEGACY; + sky2_pci_write32(hw, PCI_DEV_REG1, reg1); + } + /* block receiver */ sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_SET); sky2_read32(hw, B0_CTST);