drivers/usb/pci_xhci: Add a driver to generate xHCI ACPI nodes

We can use xhci_for_each_ext_cap to inspect the xHC so we generate the
correct number of device nodes.

    Scope (\_SB.PCI0.PBRA)
    {
        Device (XHC1)
        {
            Name (_ADR, 0x0000000000000004)  // _ADR: Address
            Method (_STA, 0, NotSerialized)  // _STA: Status
            {
                Return (0x0F)
            }

            Name (_PRW, Package (0x02)  // _PRW: Power Resources for Wake
            {
                0x1F,
                0x03
            })
            Device (RHUB)
            {
                Name (_ADR, Zero)  // _ADR: Address
                Device (HS01)
                {
                    Name (_ADR, 0x01)  // _ADR: Address
                }

                Device (HS02)
                {
                    Name (_ADR, 0x02)  // _ADR: Address
                }

                Device (SS01)
                {
                    Name (_ADR, 0x03)  // _ADR: Address
                }
            }

            Name (_S0W, Zero)  // _S0W: S0 Device Wake State
            Name (_S3W, 0x04)  // _S3W: S3 Device Wake State
            Name (_S4W, 0x04)  // _S4W: S4 Device Wake State
        }
    }

BUG=b:154756391
TEST=Boot trembyle and look at ACPI table. See all xHCI nodes.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I44ebaef342e45923bc181ceebef882358d33f0d1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41900
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/drivers/usb/pci_xhci/pci_xhci.h b/src/drivers/usb/pci_xhci/pci_xhci.h
new file mode 100644
index 0000000000..a923351ac2
--- /dev/null
+++ b/src/drivers/usb/pci_xhci/pci_xhci.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __DRIVERS_USB_PCI_XHCI__
+#define __DRIVERS_USB_PCI_XHCI__
+
+#include <commonlib/bsd/cb_err.h>
+#include <device/device.h>
+
+/*
+ * Returns the wake GPE for the Extensible Host Controller.
+ * Set gpe to -1 if there is no GPE is available.
+ */
+enum cb_err pci_xhci_get_wake_gpe(const struct device *dev, int *gpe);
+
+#endif /* __DRIVERS_USB_PCI_XHCI__ */