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authorstephen hemminger <shemminger@vyatta.com>2012-03-21 05:32:05 +0000
committerDavid S. Miller <davem@davemloft.net>2012-03-21 16:54:36 -0400
commit5676cc7bfe1e388e87843f71daa229610385b41e (patch)
treea46908a8b9e428e4689fd58d6c3b50fd53781993 /drivers/net
parent2a2a459eeeff48640dc557548ce576d666ab06ed (diff)
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 <arekm@maven.pl> Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/marvell/sky2.c11
1 files changed, 11 insertions, 0 deletions
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);