[coreboot-gerrit] Change in coreboot[master]: usb: add a new function soc_get_usb_ctlr

[Tim Wawrzynczak (Code Review)]

Tim Wawrzynczak has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/38683 )

Change subject: usb: add a new function soc_get_usb_ctlr
......................................................................

usb: add a new function soc_get_usb_ctlr

The new function should be provided by SoCs or mainboards, and it simply
returns the 'struct device *' representing the USB root controller.

Change-Id: I7dd2569dd615722a69f2dfd75622362e56a424ea
Signed-off-by: Tim Wawrzynczak 
---
M src/device/Makefile.inc
A src/device/usb_device.c
A src/include/device/usb.h
M src/soc/intel/common/block/xhci/xhci.c
4 files changed, 43 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/83/38683/1

diff --git a/src/device/Makefile.inc b/src/device/Makefile.inc
index 966ca0d..33d81b9 100644
--- a/src/device/Makefile.inc
+++ b/src/device/Makefile.inc
@@ -58,3 +58,5 @@
 verstage-y += mmio.c
 romstage-y += mmio.c
 ramstage-y += mmio.c
+
+ramstage-y += usb_device.c
diff --git a/src/device/usb_device.c b/src/device/usb_device.c
new file mode 100644
index 0000000..723ad1b
--- /dev/null
+++ b/src/device/usb_device.c
@@ -0,0 +1,16 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2020 The coreboot project Authors.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <device/device.h>
+#include <device/usb.h>
+
+/* Return the devicetree entry for the USB controller */
+__weak struct device *soc_get_usb_ctlr(void)
+{
+	return NULL;
+}
diff --git a/src/include/device/usb.h b/src/include/device/usb.h
new file mode 100644
index 0000000..bd0f190
--- /dev/null
+++ b/src/include/device/usb.h
@@ -0,0 +1,19 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2020 The coreboot project Authors.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef _DEVICE_USB_H_
+#define _DEVICE_USB_H_
+
+/**
+ * Return the devicetree entry for the USB controller.
+ *
+ * SoC-specific by nature.
+ */
+struct device *soc_get_usb_ctlr(void);
+
+#endif /* _DEVICE_USB_H_ */
diff --git a/src/soc/intel/common/block/xhci/xhci.c b/src/soc/intel/common/block/xhci/xhci.c
index 4b8a5cc..222b215 100644
--- a/src/soc/intel/common/block/xhci/xhci.c
+++ b/src/soc/intel/common/block/xhci/xhci.c
@@ -19,6 +19,7 @@
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ids.h>
+#include <device/usb.h>
 #include <drivers/usb/acpi/chip.h>
 #include <intelblocks/acpi.h>
 #include <intelblocks/xhci.h>
@@ -107,6 +108,11 @@

__weak void soc_xhci_init(struct device *dev) { /* no-op */ }

+struct device *soc_get_usb_ctlr(void)
+{
+	return pcidev_path_on_root(PCH_DEVFN_XHCI);
+}
+
 static struct device_operations usb_xhci_ops = {
    .read_resources		= pci_dev_read_resources,
    .set_resources		= pci_dev_set_resources,