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