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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2020 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.
#ifndef __SD_H
#define __SD_H
#include <zephyr.h>
enum sd_state {
SD_MUX_OFF, /**< Disconnect the SD card. */
SD_MUX_FPGA, /**< Connect the SD card to the FPGA. */
SD_MUX_USB, /**< Connect the SD card to the USB controller. */
* @brief Set the state of the SD card mux.
* This function sets the SD card mux signal lines to disconnect the SD
* card signals, or to connect them to either the FPGA or the USB controller.
* @param state One of the values from sd_state
* @retval 0 if successful.
* @retval -ENODEV or error return from Zephyr API functions.
int sd_mux_set(enum sd_state state);
/** @brief Get the state of the SD card mux.
* @retval The current sd_state.
enum sd_state sd_mux_get(void);
* @brief Return the state of the SD's CD_DET signal.
* @retval 0 if the SD card is inserted
* @retval 1 if the SD card is not inserted
* @retval negative errno value if there was a failure
int sd_get_cd_det(void);