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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.
*/
#include <stdint.h>
#include <stdio.h>
#include <libpayload.h>
#include <storage/ata.h>
#include <storage/atapi.h>
static int atapi_request_sense(atapi_dev_t *const dev)
{
u8 cdb[12] = { 0, };
cdb[0] = ATAPI_REQUEST_SENSE;
cdb[4] = sizeof(dev->sense_data);
return dev->packet_read_cmd(dev, cdb, sizeof(cdb),
dev->sense_data, sizeof(dev->sense_data));
}
static ssize_t atapi_packet_read_cmd(atapi_dev_t *const dev,
const u8 *const cmd, const size_t cmdlen,
u8 *const buf, const size_t buflen)
{
int retries = 10;
ssize_t ret;
do {
ret = dev->packet_read_cmd(dev, cmd, cmdlen, buf, buflen);
if (ret >= 0)
return ret;
ret = atapi_request_sense(dev);
if (ret < 0) {
printf("atapi: Requesting sense failed.\n");
return -1;
}
switch (dev->sense_data[2] & 0xf) {
case ATAPI_SENSE_UNIT_ATTENTION:
/* Nothing to do. */
break;
case ATAPI_SENSE_NOT_READY:
switch (dev->sense_data[12]) {
case ATAPI_ADDITIONAL_SENSE_LOGICAL_UNIT_NOT_READY:
/* Device wants more time. */
delay(3);
break;
case ATAPI_ADDITIONAL_SENSE_MEDIUM_NOT_PRESENT:
printf("atapi: No medium present.\n");
dev->medium_present = 0;
return -1;
}
break;
default:
return -1;
}
} while (retries--);
/* No more retries. */
return -1;
}
static ssize_t atapi_packet_read_sectors(ata_dev_t *const _dev,
const lba_t start, size_t count,
u8 *const buf)
{
atapi_dev_t *const dev = (atapi_dev_t *)_dev;
if (start >= (1ULL << 32)) {
printf("atapi: Sector is not 32-bit addressable.\n");
return -1;
} else if (count >= (64 * 1024)) {
printf("ahci: Sector count too high (max. 65535).\n");
count = (64 * 1024) - 1;
}
u8 cdb[12] = { 0, };
cdb[0] = ATAPI_READ_10;
cdb[2] = (start >> 24) & 0xff;
cdb[3] = (start >> 16) & 0xff;
cdb[4] = (start >> 8) & 0xff;
cdb[5] = (start >> 0) & 0xff;
cdb[7] = (count >> 8) & 0xff;
cdb[8] = (count >> 0) & 0xff;
const ssize_t ret = atapi_packet_read_cmd(dev, cdb, sizeof(cdb),
buf, count << dev->ata_dev.sector_size_shift);
if (ret < 0)
return ret;
else
return ret >> dev->ata_dev.sector_size_shift;
}
static storage_poll_t atapi_poll(storage_dev_t *const _dev)
{
atapi_dev_t *const dev = (atapi_dev_t *)_dev;
u8 cdb[12] = { 0, };
u8 capacity[8];
if (dev->medium_present)
return POLL_MEDIUM_PRESENT;
cdb[0] = ATAPI_TEST_UNIT_READY;
const int ret = atapi_packet_read_cmd(dev, cdb, sizeof(cdb), NULL, 0);
if (!ret) {
printf("atapi: Found medium.\n");
dev->medium_present = 1;
} else if (dev->medium_present) {
return POLL_ERROR;
}
if (dev->medium_present) {
cdb[0] = ATAPI_START_STOP_UNIT;
cdb[4] = 0x01; /* Start Disc, read TOC. */
if (atapi_packet_read_cmd(dev, cdb, sizeof(cdb), NULL, 0))
goto _error_ret;
cdb[4] = 0x00;
}
cdb[0] = ATAPI_PREVENT_ALLOW_MEDIUM_REMOVAL;
cdb[2] = 0x02; /* Clear persistent prevent removal bit. */
atapi_packet_read_cmd(dev, cdb, sizeof(cdb), NULL, 0);
cdb[2] = 0x00; /* Clear prevent removal bit. */
atapi_packet_read_cmd(dev, cdb, sizeof(cdb), NULL, 0);
/* If we don't have a medium, we're done. */
if (!dev->medium_present)
return POLL_NO_MEDIUM;
/* Read capacity and sector size. */
cdb[0] = ATAPI_READ_CAPACITY;
if (atapi_packet_read_cmd(dev, cdb, sizeof(cdb),
(u8 *)capacity, sizeof(capacity))
!= sizeof(capacity))
goto _error_ret;
const u32 sector_size = (capacity[4] << 24) |
(capacity[5] << 16) |
(capacity[6] << 8) |
(capacity[7] << 0);
if (ata_set_sector_size(&dev->ata_dev, sector_size)) {
dev->medium_present = 0;
return POLL_MEDIUM_ERROR;
}
return POLL_MEDIUM_PRESENT;
_error_ret:
dev->medium_present = 0;
return POLL_ERROR;
}
int atapi_attach_device(atapi_dev_t *const dev, const storage_port_t port_type)
{
u16 id[256];
dev->ata_dev.identify_cmd = ATA_IDENTIFY_PACKET_DEVICE;
if (dev->identify(&dev->ata_dev, (u8 *)id))
return -1;
char fw[9], model[41];
ata_strncpy(fw, id + 23, sizeof(fw));
ata_strncpy(model, id + 27, sizeof(model));
printf("atapi: Identified %s [%s]\n", model, fw);
/* Initialize to sane values. */
dev->ata_dev.sector_size = 2048;
dev->ata_dev.sector_size_shift = 11;
dev->medium_present = 0;
/* Reuse ata procedures. */
ata_initialize_storage_ops(&dev->ata_dev);
dev->ata_dev.read_sectors = atapi_packet_read_sectors;
dev->ata_dev.storage_dev.port_type = port_type;
dev->ata_dev.storage_dev.poll = atapi_poll;
return storage_attach_device(&dev->ata_dev.storage_dev);
}
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