/***************************************************************************
* Copyright (C) 2007 by Arep *
* Support is provided through the forums at *
* http://wii.console-tribe.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
/*! \file
* \brief Memory dump functions specific to drives based on the Hitachi MN103 chip.
*
* Drives which are supported by this set of functions are, for instance, the LG GDR-8161B, GDR-8162B, GDR-8163B and GDR-8164B. All testing has been performed
* with the latter model, so I'm not really sure about the others, but they should work ;). Please report any issues and more compatible drives!
*
* This file contains code derived from the work of Kevin East (SeventhSon), kev@kev.nu, http://www.kev.nu/360/ , which, in turn, derives from work by
* a lot of other people. See his page for full details.
*/
#include <stdio.h>
#include <sys/types.h>
#include "misc.h"
#include "dvd_drive.h"
/*! \brief Memory offset at which the drive cache memory is mapped.
*
* During READ, sector data is cached beginning at this address.
*/
#define HITACHI_MEM_BASE 0x80000000
/**
* Dumps a single block (with arbitrary size) of the address space of the MN103 microcontroller within the Hitachi-LG Xbox 360 DVD drive and similar drives.
* This function is derived from the work of Kevin East (SeventhSon), kev@kev.nu, http://www.kev.nu/360/.
* @param dvd The DVD drive the command should be exectued on.
* @param offset The absolute memory offset to start dumping.
* @param block_size The block size for the dump.
* @param buf Where to place the dumped data. This must have been setup by the caller to store up to block_size bytes.
* @return < 0 if an error occurred, 0 otherwise.
*/
int hitachi_dvd_dump_memblock (dvd_drive *dvd, u_int32_t offset, u_int32_t block_size, u_int8_t *buf) {
mmc_command mmc;
int out;
if (!buf) {
error ("NULL buffer");
out = -1;
} else if (!block_size || block_size > 65535) {
error ("invalid block_size (valid: 1 - 65535)");
out = -2;
} else {
dvd_init_command (&mmc, buf, block_size, NULL);
mmc.cmd[0] = 0xE7; // vendor specific command (discovered by DaveX)
mmc.cmd[1] = 0x48; // H
mmc.cmd[2] = 0x49; // I
mmc.cmd[3] = 0x54; // T
mmc.cmd[4] = 0x01; // read MCU memory sub-command
mmc.cmd[6] = (unsigned char) ((offset & 0xFF000000) >> 24); // address MSB
mmc.cmd[7] = (unsigned char) ((offset & 0x00FF0000) >> 16); // address
mmc.cmd[8] = (unsigned char) ((offset & 0x0000FF00) >> 8); // address
mmc.cmd[9] = (unsigned char) (offset & 0x000000FF); // address LSB
mmc.cmd[10] = (unsigned char) ((block_size & 0xFF00) >> 8); // length MSB
mmc.cmd[11] = (unsigned char) (block_size & 0x00FF); // length LSB
out = dvd_execute_cmd (dvd, &mmc, false);
}
return (out);
}
/**
* Dumps a given portion of the address space of the MN103 microcontroller within the Hitachi-LG Xbox 360 DVD drive.
* WARNING: it can take a while to dump a lot of data.
* @param dvd The DVD drive the command should be exectued on.
* @param offset The absolute memory offset to start dumping.
* @param block_len The number of blocks to dump.
* @param block_size The block size for the dump.
* @param buf Where to place the dumped data. This must have been setup by the caller to store up to block_size bytes.
* @return < 0 if an error occurred, 0 otherwise.
*/
int hitachi_dvd_dump_mem_generic (dvd_drive *dvd, u_int32_t offset, u_int32_t block_len, u_int32_t block_size, u_int8_t *buf) {
u_int32_t i;
int r, out;
if (!buf) {
error ("NULL buffer");
out = -1;
} else {
r = -10;
for (i = 0; i < block_len; i++) {
if ((r = hitachi_dvd_dump_memblock (dvd, offset + i * block_size, block_size, buf + i * block_size)) < 0) {
error ("hitachi_dvd_read_block() failed with %d", r);
break;
}
}
out = r;
}
return (out);
}
/**
* Dumps a given portion of the address space of the MN103 microcontroller within the Hitachi-LG Xbox 360 DVD drive, starting at the offset at which
* sector data are cached.
* WARNING: it can take a while to dump a lot of data.
* @param dvd The DVD drive the command should be exectued on.
* @param offset The memory offset to start dumping, relative to the cache start offset.
* @param block_len The number of blocks to dump.
* @param block_size The block size for the dump.
* @param buf Where to place the dumped data. This must have been setup by the caller to store up to block_size bytes.
* @return < 0 if an error occurred, 0 otherwise.
*/
int hitachi_dvd_dump_mem (dvd_drive *dvd, u_int32_t offset, u_int32_t block_len, u_int32_t block_size, u_int8_t *buf) {
u_int32_t i;
int r, out;
if (!buf) {
error ("NULL buffer");
out = -1;
} else {
r = -10;
for (i = 0; i < block_len; i++) {
if ((r = hitachi_dvd_dump_memblock (dvd, HITACHI_MEM_BASE + offset + i * block_size, block_size, buf + i * block_size)) < 0) {
error ("hitachi_dvd_read_block() failed with %d", r);
break;
}
}
out = r;
}
return (out);
}