1 files changed, 61 insertions, 0 deletions
diff --git a/zephyr/shim/src/usb_muxes.c b/zephyr/shim/src/usb_muxes.c
new file mode 100644
index 0000000000..e162478fec
--- /dev/null
+++ b/zephyr/shim/src/usb_muxes.c
@@ -0,0 +1,61 @@
+/* Copyright 2022 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <devicetree.h>
+#include <sys/util_macro.h>
+#include "usb_mux.h"
+#include "usbc/usb_muxes.h"
+
+/**
+ * @brief Macro that can be used in USB_MUX_FOREACH_USBC_PORT as filter
+ *        argument. It allows to evaluate to "1 ||" for each named USBC port
+ *        that has usb-muxes property.
+ */
+#define USB_MUX_PORT_HAS_MUX(unused1, unused2)		1 ||
+
+/**
+ * Check if there is any named USBC port with usb-muxes property. It evaluates
+ * to "1 || 1 || ... 1 || 0" when there are multiple named USBC ports with
+ * usb-muxes property and to "0" when any named USBC port has usb-muxes
+ * property.
+ *
+ * This prevents creating struct usb_mux usb_muxes[] for platforms that didn't
+ * migrate USB mux configuration to DTS yet.
+ */
+#if USB_MUX_FOREACH_USBC_PORT(USB_MUX_PORT_HAS_MUX, _) 0
+
+/**
+ * Define root of each USB muxes chain e.g.
+ * [0] = {
+ *         .usb_port = 0,
+ *         .next_mux = &USB_MUX_NODE_DT_N_S_usbc_S_port0_0_S_it5205_mux_0,
+ *         .board_init = &board_init,
+ *         .board_set = NULL,
+ *         .flags = 0,
+ *         .driver = &virtual_usb_mux_driver,
+ *         .hpd_update = &virtual_hpd_update,
+ * },
+ * [1] = { ... },
+ */
+MAYBE_CONST struct usb_mux usb_muxes[] = {
+	USB_MUX_FOREACH_USBC_PORT(USB_MUX_FIRST, USB_MUX_ARRAY)
+};
+
+/**
+ * Define all USB muxes except roots e.g.
+ * MAYBE_CONST struct usb_mux USB_MUX_NODE_DT_N_S_usbc_S_port0_0_S_mux_0 = {
+ *         .usb_port = 0,
+ *         .next_mux = NULL,
+ *         .board_init = NULL,
+ *         .board_set = NULL,
+ *         .flags = 0,
+ *         .driver = &virtual_usb_mux_driver,
+ *         .hpd_update = &virtual_hpd_update,
+ * };
+ * MAYBE_CONST struct usb_mux USB_MUX_NODE_<node_id> = { ... };
+ */
+USB_MUX_FOREACH_USBC_PORT(USB_MUX_NO_FIRST, USB_MUX_DEFINE)
+
+#endif /* #if USB_MUX_FOREACH_USBC_PORT(USB_MUX_PORT_HAS_MUX, _) */