diff options
Diffstat (limited to 'src/soc/intel/broadwell/xhci.c')
| -rw-r--r-- | src/soc/intel/broadwell/xhci.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/xhci.c b/src/soc/intel/broadwell/xhci.c index 4c721c28a3..fde8bf7cd6 100644 --- a/src/soc/intel/broadwell/xhci.c +++ b/src/soc/intel/broadwell/xhci.c @@ -192,11 +192,30 @@ void usb_xhci_sleep_prepare(device_t dev, u8 slp_typ) } #else /* !__SMM__ */ +static void xhci_init(struct device *dev) +{ + struct resource *res = find_resource(dev, PCI_BASE_ADDRESS_0); + u16 reg16; + u32 reg32; + + /* Ensure controller is in D0 state */ + reg16 = pci_read_config16(dev, XHCI_PWR_CTL_STS); + reg16 &= ~XHCI_PWR_CTL_SET_MASK; + reg16 |= XHCI_PWR_CTL_SET_D0; + pci_write_config16(dev, XHCI_PWR_CTL_STS, reg16); + + /* Disable Compliance Mode Entry */ + reg32 = read32(res2mmio(res, 0x80ec, 0)); + reg32 |= (1 << 0); + write32(res2mmio(res, 0x80ec, 0), reg32); +} + static struct device_operations usb_xhci_ops = { .read_resources = &pci_dev_read_resources, .set_resources = &pci_dev_set_resources, .enable_resources = &pci_dev_enable_resources, .ops_pci = &broadwell_pci_ops, + .init = &xhci_init, }; static const unsigned short pci_device_ids[] = { |