/*
 * SPDX-FileCopyrightText: 2017-2025 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include "ff.h"

#define FF_DRV_NOT_USED 0xFF

#include "diskio.h"
#include "esp_err.h"

/**
 * Structure of pointers to disk IO driver functions.
 *
 * See FatFs documentation for details about these functions
 */
typedef struct {
    DSTATUS (*init) (unsigned char pdrv);    /*!< disk initialization function */
    DSTATUS (*status) (unsigned char pdrv);  /*!< disk status check function */
    DRESULT (*read) (unsigned char pdrv, unsigned char* buff, uint32_t sector, UINT count);  /*!< sector read function */
    DRESULT (*write) (unsigned char pdrv, const unsigned char* buff, uint32_t sector, UINT count);   /*!< sector write function */
    DRESULT (*ioctl) (unsigned char pdrv, unsigned char cmd, void* buff); /*!< function to get info about disk and do some misc operations */
} ff_diskio_impl_t;

/**
 * Register or unregister diskio driver for given drive number.
 *
 * When FATFS library calls one of disk_xxx functions for driver number pdrv,
 * corresponding function in discio_impl for given pdrv will be called.
 *
 * @param pdrv drive number
 * @param discio_impl   pointer to ff_diskio_impl_t structure with diskio functions
 *                      or NULL to unregister and free previously registered drive
 */
void ff_diskio_register(BYTE pdrv, const ff_diskio_impl_t* discio_impl);

#define ff_diskio_unregister(pdrv_) ff_diskio_register(pdrv_, NULL)


/**
 * Get next available drive number
 *
 * @param   out_pdrv            pointer to the byte to set if successful
 *
 * @return  ESP_OK              on success
 *          ESP_ERR_NOT_FOUND   if all drives are attached
 */
esp_err_t ff_diskio_get_drive(BYTE* out_pdrv);


#ifdef __cplusplus
}
#endif