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/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <zephyr/devicetree.h>
#include <zephyr/sys/util_macro.h>
#include "usb_mux.h"
#include "usbc/usb_muxes.h"
/**
* This prevents creating struct usb_mux usb_muxes[] for platforms that didn't
* migrate USB mux configuration to DTS yet.
*/
#if DT_HAS_COMPAT_STATUS_OKAY(cros_ec_usb_mux_chain)
/**
* @brief Check if @p mux_id is not part of @p chain_id or if @p chain_id USBC
* port is the same as @p mux_port. Result ends with && to construct
* logical expression using FOREACH macro.
*
* @param chain_id Chain DTS node ID
* @param mux_id USB mux node ID
* @param mux_port Port which should be associated with @p mux_id
*/
#define USB_MUX_NOT_IN_CHAIN_OR_PORT_EQ(chain_id, mux_id, mux_port) \
((USB_MUX_FIND_PORT(chain_id, mux_id)(-1)) == -1 || \
USBC_PORT(chain_id) == mux_port) &&
/**
* @brief Check if all chains that contains @p mux_id have the same USB-C port
*
* @param mux_id USB mux node ID
* @param unused_conf Unused argument required by USB_MUX_FOREACH_MUX()
*/
#define USB_MUX_CHECK_ALL_PORTS_ARE_SAME(mux_id, unused_conf) \
BUILD_ASSERT( \
USB_MUX_FOREACH_CHAIN_VARGS(USB_MUX_NOT_IN_CHAIN_OR_PORT_EQ, \
mux_id, USB_MUX_PORT(mux_id)) 1, \
"USB mux " #mux_id " is in chains for different ports");
/** Check if for every mux, chains where mux is present have the same port */
USB_MUX_FOREACH_MUX(USB_MUX_CHECK_ALL_PORTS_ARE_SAME)
/**
* Declare all usb_mux_chain structures e.g.
* MAYBE_CONST struct usb_mux_chain
* USB_MUX_chain_port_<port_id>_mux_<position_id>;
*/
USB_MUX_FOREACH_CHAIN_VARGS(USB_MUX_FOREACH_NO_ROOT_MUX,
USB_MUX_CHAIN_STRUCT_DECLARE_OP)
/**
* Define usb_mux_chain structures for main chain e.g.
*
* MAYBE_CONST struct usb_mux_chain
* USB_MUX_chain_port_<port_id>_mux_<position_id> = {
* .mux = &USB_MUX_NODE_DT_N_S_usbc_S_port0_0_S_virtual_mux_0,
* .next = &USB_MUX_chain_port_0_mux_1,
* }
*/
USB_MUX_FOREACH_CHAIN_VARGS(USB_MUX_FOR_MAIN_CHAIN, USB_MUX_FOREACH_NO_ROOT_MUX,
USB_MUX_CHAIN_STRUCT_DEFINE_OP)
/**
* Forward declarations for board_init and board_set callbacks. e.g.
* int c0_mux0_board_init(const struct usb_mux *);
* int c1_mux0_board_set(const struct usb_mux *, mux_state_t);
*/
USB_MUX_FOREACH_MUX(USB_MUX_CB_BOARD_INIT_DECLARE_IF_EXISTS)
USB_MUX_FOREACH_MUX(USB_MUX_CB_BOARD_SET_DECLARE_IF_EXISTS)
/**
* Define root of each USB muxes chain e.g.
* [0] = {
* .mux = &USB_MUX_NODE_DT_N_S_usbc_S_port0_0_S_virtual_mux_0,
* .next = &USB_MUX_chain_port_0_mux_1,
* },
* [1] = { ... },
*/
MAYBE_CONST struct usb_mux_chain usb_muxes[] = { USB_MUX_FOREACH_CHAIN_VARGS(
USB_MUX_FOR_MAIN_CHAIN, USB_MUX_DEFINE_ROOT_MUX) };
BUILD_ASSERT(ARRAY_SIZE(usb_muxes) == CONFIG_USB_PD_PORT_MAX_COUNT);
/**
* Define all USB muxes e.g.
* MAYBE_CONST struct usb_mux USB_MUX_NODE_DT_N_S_usbc_S_port0_0_S_mux_0 = {
* .usb_port = 0,
* .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_MUX(USB_MUX_DEFINE)
#endif /* #if DT_HAS_COMPAT_STATUS_OKAY(cros_ec_usb_mux_chain) */
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