| /* 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); |
| |
| #endif |
