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| author | stephen hemminger <shemminger@vyatta.com> | 2012-03-21 05:32:05 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-02 09:27:21 -0700 |
| commit | 9c057cf429232fed2f2aee92aa381e56686796f1 (patch) | |
| tree | ff9877dd1fab9cd40988985b5dddd0e006198e70 /drivers/net/sky2.c | |
| parent | 276b5b3b43807632637cdd160eba2c5facb7e14a (diff) | |
| download | kernel_samsung_smdk4412-9c057cf429232fed2f2aee92aa381e56686796f1.zip kernel_samsung_smdk4412-9c057cf429232fed2f2aee92aa381e56686796f1.tar.gz kernel_samsung_smdk4412-9c057cf429232fed2f2aee92aa381e56686796f1.tar.bz2 | |
sky2: override for PCI legacy power management
[ Upstream commit 5676cc7bfe1e388e87843f71daa229610385b41e ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/sky2.c')
| -rw-r--r-- | drivers/net/sky2.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 3ee41da..80df3a8 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -94,6 +94,10 @@ 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 */ @@ -794,6 +798,13 @@ 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); } |