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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2012 secunet Security Networks AG
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#ifndef _STORAGE_ATA_H
#define _STORAGE_ATA_H
#include <stdint.h>
#include "storage.h"
/* ATA commands */
enum {
ATA_READ_DMA = 0xc8,
ATA_READ_DMA_EXT = 0x25,
ATA_IDENTIFY_DEVICE = 0xec,
ATA_PACKET = 0xa0,
ATA_IDENTIFY_PACKET_DEVICE = 0xa1,
};
/* 16-bit-word indices into id structure from ATA_IDENTIFY_DEVICE */
enum {
ATA_CMDS_AND_FEATURE_SETS = 82,
ATA_ID_SECTOR_SIZE = 106,
ATA_ID_LOGICAL_SECTOR_SIZE = 117,
};
#define DEFAULT_ATA_SECTOR_SIZE 512
struct ata_dev;
typedef struct ata_dev {
storage_dev_t storage_dev;
int (*identify)(struct ata_dev *, u8 *buf);
ssize_t (*read_sectors)(struct ata_dev *, lba_t start, size_t count, u8 *buf);
u8 read_cmd;
u8 identify_cmd;
size_t sector_size;
size_t sector_size_shift;
void (*detach_device)(struct ata_dev *);
} ata_dev_t;
int ata_attach_device(ata_dev_t *, storage_port_t);
char *ata_strncpy(char *dest, const u16 *src, size_t n);
int ata_set_sector_size(ata_dev_t *, u32 sector_size);
void ata_initialize_storage_ops(ata_dev_t *);
#endif
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