diff options
| -rw-r--r-- | src/drivers/usb/pci_ehci.c | 9 |
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; |