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-rw-r--r--src/drivers/usb/pci_ehci.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/drivers/usb/pci_ehci.c b/src/drivers/usb/pci_ehci.c
index 9099976ad5..73c709cdd8 100644
--- a/src/drivers/usb/pci_ehci.c
+++ b/src/drivers/usb/pci_ehci.c
@@ -44,6 +44,15 @@ int ehci_debug_hw_enable(unsigned int *base, unsigned int *dbg_offset)
if (class != PCI_EHCI_CLASSCODE)
return -1;
+ u8 pm_cap = pci_find_capability(dev, PCI_CAP_ID_PM);
+ if (pm_cap) {
+ u16 pm_ctrl = pci_read_config16(dev, pm_cap + PCI_PM_CTRL);
+ /* Set to D0 and disable PM events. */
+ pm_ctrl &= ~PCI_PM_CTRL_PME_ENABLE;
+ pm_ctrl &= ~PCI_PM_CTRL_STATE_MASK;
+ pci_write_config16(dev, pm_cap + PCI_PM_CTRL, pm_ctrl);
+ }
+
u8 pos = pci_find_capability(dev, PCI_CAP_ID_EHCI_DEBUG);
if (!pos)
return -1;