1f6bd94fa8
This adds a new interface for storage devices. A driver for ATA and
ATAPI drives on AHCI host controllers comes along.
The interface is very simple and was designed to match FILO's needs.
It consists of three functions:
void storage_initialize(void);
Initializes controllers. Should be called once at startup.
storage_poll_t storage_probe(size_t dev_num);
with typedef enum {
POLL_NO_DEVICE = -2,
POLL_ERROR = -1,
POLL_NO_MEDIUM = 0,
POLL_MEDIUM_PRESENT = 1,
} storage_poll_t;
Looks for a drive with number dev_num (drives are counted from
zero) and polls for a medium in the drive if appropriate.
int storage_read_blocks512(size_t dev_num,
u64 start, size_t count,
unsigned char *buf);
Reads count blocks of 512 bytes from block start of drive dev_num
into buf.
Change-Id: I1c85796b7f8e379ff3817a61b1837636b57e182b
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1622
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Peter Stuge <peter@stuge.se>
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2012 secunet Security Networks AG
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _STORAGE_ATA_H
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#define _STORAGE_ATA_H
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#include <stdint.h>
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#include "storage.h"
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/* ATA commands */
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enum {
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ATA_READ_DMA = 0xc8,
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ATA_READ_DMA_EXT = 0x25,
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ATA_IDENTIFY_DEVICE = 0xec,
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ATA_PACKET = 0xa0,
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ATA_IDENTIFY_PACKET_DEVICE = 0xa1,
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};
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/* 16-bit-word indices into id structure from ATA_IDENTIFY_DEVICE */
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enum {
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ATA_CMDS_AND_FEATURE_SETS = 82,
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ATA_ID_SECTOR_SIZE = 106,
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ATA_ID_LOGICAL_SECTOR_SIZE = 117,
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};
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#define DEFAULT_ATA_SECTOR_SIZE 512
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struct ata_dev;
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typedef struct ata_dev {
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storage_dev_t storage_dev;
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int (*identify)(struct ata_dev *, u8 *buf);
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ssize_t (*read_sectors)(struct ata_dev *, lba_t start, size_t count, u8 *buf);
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u8 read_cmd;
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u8 identify_cmd;
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size_t sector_size;
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size_t sector_size_shift;
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void (*detach_device)(struct ata_dev *);
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} ata_dev_t;
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int ata_attach_device(ata_dev_t *, storage_port_t);
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char *ata_strncpy(char *dest, const u16 *src, size_t n);
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int ata_set_sector_size(ata_dev_t *, u32 sector_size);
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void ata_initialize_storage_ops(ata_dev_t *);
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#endif
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