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Commit 5676cc7b authored by stephen hemminger's avatar stephen hemminger Committed by David S. Miller
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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: default avatarArkadiusz Miskiewicz <arekm@maven.pl>
Signed-off-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2a2a459e

drivers/net/ethernet/marvell/sky2.c

+11 −0
Original line number Diff line number Diff line
@@ -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);