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/*
* Copyright (c) 2007 The tyndur Project. All rights reserved.
*
* This code is derived from software contributed to the tyndur Project
* by Antoine Kaufmann.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDERS 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 <stdio.h>
#include <stdlib.h>
#include "cdi.h"
#include "cdi/storage.h"
#include "cdi/misc.h"
#include "cdi/io.h"
#include "cdi/scsi.h"
#include "device.h"
/**
* ATAPI-Geraet identifizieren
*
* @return 0 Wenn das Geraet erfolgreich identifiziert wurde, != 0 sonst
*/
int atapi_drv_identify(struct ata_device* dev)
{
struct ata_identfiy_data id;
// Request vorbereiten
struct ata_request request = {
.dev = dev,
.flags.direction = READ,
.flags.poll = 1,
.flags.lba = 0,
// Die Identifikationsdaten werden ueber PIO DATA IN gelesen
.protocol = PIO,
.registers.ata.command = IDENTIFY_PACKET_DEVICE,
.block_count = 1,
.block_size = ATA_SECTOR_SIZE,
.buffer = &id,
.error = 0
};
// Request starten
if (!ata_request(&request)) {
// Pech gehabt
return 0;
}
// Es handelt sich um ein ATAPI-Geraet
dev->atapi = 1;
return 1;
}
void atapi_init_device(struct ata_device* device)
{
struct cdi_scsi_device* scsi = (struct cdi_scsi_device*) device;
scsi->type = CDI_STORAGE;
cdi_scsi_device_init(scsi);
}
void atapi_remove_device(struct cdi_device* device)
{
}
int atapi_request(struct cdi_scsi_device* scsi,struct cdi_scsi_packet* packet)
{
struct ata_device *dev = (struct ata_device*)scsi;
struct ata_request request = {
.dev = dev,
.protocol = PIO,
.flags = {
.direction = WRITE,
.poll = 1,
.ata = 0, // Ich brauch nur ATA-Befehle (Packet)
.lba = 0 // Der Kommentar in device.h ist kein deutscher Satz!
},
.registers = {
.ata = {
.command = PACKET,
.lba = 0x00FFFF00 // Sonst hat bei mir nachher nichts in den
// LBA-Registern dringestanden und die
// braucht man ja fuer die Paketgroesse.
}
},
.block_count = 1,
.block_size = packet->cmdsize,
.blocks_done = 0,
.buffer = packet->command,
.error = 0
};
if (ata_request(&request))
{
int status;
struct ata_request rw_request = {
.dev = dev,
.flags = {
.poll = 1,
.lba = 1,
.ata = 1
},
.block_count = 1,
.block_size = packet->bufsize,
.blocks_done = 0,
.buffer = packet->buffer,
.error = 0
};
// Lesen bzw. Schreiben der Daten
// TODO: DMA
if (packet->direction==CDI_SCSI_READ) ata_protocol_pio_in(&rw_request);
else if (packet->direction==CDI_SCSI_WRITE) ata_protocol_pio_in(&rw_request);
// Bei Fehler den Sense Key zurueckgeben
status = ata_reg_inb(dev->controller, REG_STATUS);
if (status & STATUS_ERR) {
return (ata_reg_inb(dev->controller, REG_ERROR) >> 4);
} else {
return 0;
}
}
return 0xB;
}