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>
79 lines
2.6 KiB
C
79 lines
2.6 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_ATAPI_H
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#define _STORAGE_ATAPI_H
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#include <stdint.h>
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#include "storage.h"
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#include "ata.h"
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/* ATAPI commands */
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enum {
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ATAPI_TEST_UNIT_READY = 0x00,
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ATAPI_REQUEST_SENSE = 0x03,
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ATAPI_START_STOP_UNIT = 0x1b,
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ATAPI_PREVENT_ALLOW_MEDIUM_REMOVAL = 0x1e,
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ATAPI_READ_CAPACITY = 0x25,
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ATAPI_READ_10 = 0x28,
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};
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/* ATAPI sense codes */
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enum {
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ATAPI_SENSE_NOT_READY = 0x02,
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ATAPI_SENSE_UNIT_ATTENTION = 0x06,
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};
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/* ATAPI additional sense codes (particularize the above) */
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enum {
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ATAPI_ADDITIONAL_SENSE_LOGICAL_UNIT_NOT_READY = 0x04,
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ATAPI_ADDITIONAL_SENSE_MEDIUM_NOT_PRESENT = 0x3a,
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};
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struct atapi_dev;
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typedef struct atapi_dev {
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/* Keep this at offset 0 so we can cast to ata_dev_t. */
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ata_dev_t ata_dev;
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int (*identify)(struct ata_dev *, u8 *buf); /* yes, ata_dev_t */
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ssize_t (*packet_read_cmd)(struct atapi_dev *, const u8 *cmd, size_t cmdlen, u8 *buf, size_t buflen);
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u8 sense_data[19]; /* We needed 19 in usbmsc.c. */
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u8 medium_present;
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void (*detach_device)(struct atapi_dev *);
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} atapi_dev_t;
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int atapi_attach_device(atapi_dev_t *, storage_port_t);
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#endif
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