contiki/dev/disk/disk.h

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/*
* Copyright (c) 2016, Benoît Thébaudeau <benoit@wsystem.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \addtogroup dev
* @{
*
* \defgroup disk Disk device drivers
*
* Documentation for all the disk device drivers.
* @{
*
* \file
* Header file defining the disk device driver API.
*/
#ifndef DISK_H_
#define DISK_H_
#include <stdint.h>
/** Disk status flags. */
typedef enum {
DISK_STATUS_INIT = 0x01, /**< Device initialized and ready to work */
DISK_STATUS_DISK = 0x02, /**< Medium present in the drive */
DISK_STATUS_WRITABLE = 0x04 /**< Writable medium */
} disk_status_t;
/** Generic disk I/O control commands. */
typedef enum {
DISK_IOCTL_CTRL_SYNC, /**< Synchronize the cached writes to persistent storage */
DISK_IOCTL_GET_SECTOR_COUNT, /**< Get the sector count through the \c uint32_t pointed to by \c buff */
DISK_IOCTL_GET_SECTOR_SIZE, /**< Get the sector size through the \c uint16_t pointed to by \c buff */
DISK_IOCTL_GET_BLOCK_SIZE, /**< Get the erase block size (in sectors) through the \c uint32_t pointed to by \c buff */
DISK_IOCTL_CTRL_TRIM /**< Trim the sector range within the \c uint32_t boundaries pointed to by \c buff */
} disk_ioctl_t;
/** Disk access result codes. */
typedef enum {
DISK_RESULT_OK, /**< Success */
DISK_RESULT_IO_ERROR, /**< Unrecoverable I/O error */
DISK_RESULT_WR_PROTECTED, /**< Write-protected medium */
DISK_RESULT_NO_INIT, /**< Device not initialized */
DISK_RESULT_INVALID_ARG /**< Invalid argument */
} disk_result_t;
/** Disk driver API structure. */
struct disk_driver {
/** Get device status. */
disk_status_t (*status)(uint8_t dev);
/** Initialize device. */
disk_status_t (*initialize)(uint8_t dev);
/** Read sector(s). */
disk_result_t (*read)(uint8_t dev, void *buff, uint32_t sector,
uint32_t count);
/** Write sector(s). */
disk_result_t (*write)(uint8_t dev, const void *buff, uint32_t sector,
uint32_t count);
/** Control device-specific features. */
disk_result_t (*ioctl)(uint8_t dev, uint8_t cmd, void *buff);
};
#endif /* DISK_H_ */
/**
* @}
* @}
*/