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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 Dave Chapman
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
static void int2be(unsigned int val, unsigned char* addr)
{
addr[0] = (val >> 24) & 0xff;
addr[1] = (val >> 16) & 0xff;
addr[2] = (val >> 8) & 0xff;
addr[3] = val & 0xFF;
}
static int le2int(unsigned char* buf)
{
int32_t res = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
return res;
}
static char* get_modelname(int version)
{
switch (version >> 8) {
case 0x01:
return "1g2g";
break;
case 0x02:
return "ip3g";
break;
case 0x40:
return "mini";
break;
case 0x50:
return "ip4g";
break;
case 0x60:
return "ipco";
break;
case 0x70:
return "mn2g";
break;
case 0xc0:
return "nano";
break;
case 0xb0:
return "ipvd";
break;
}
return NULL;
}
static int get_modelnum(int version)
{
switch (version >> 8) {
case 0x01:
return 19; // "1g2g";
break;
case 0x02:
return 7; // "ip3g";
break;
case 0x40:
return 9; // "mini";
break;
case 0x50:
return 8; // "ip4g";
break;
case 0x60:
return 3; // "ipco";
break;
case 0x70:
return 11; // "mn2g";
break;
case 0xc0:
return 4; // "nano";
break;
case 0xb0:
return 5; // "ipvd";
break;
}
return -1;
}
static void dump_app(char* name, unsigned char* p, unsigned char* flash)
{
char filename[64];
unsigned char header[8];
unsigned int i;
unsigned int sum;
int outfile;
unsigned int unknown1;
unsigned int offset;
unsigned int length;
unsigned int loadaddr;
unsigned int unknown2;
unsigned int checksum;
unsigned int version;
unsigned int unknown3;
char* modelname;
/* Extract variables from header */
unknown1 = le2int(p+0x08);
offset = le2int(p+0x0c);
length = le2int(p+0x10);
loadaddr = le2int(p+0x14);
unknown2 = le2int(p+0x18);
checksum = le2int(p+0x1c);
version = le2int(p+0x20);
unknown3 = le2int(p+0x24);
modelname = get_modelname(version);
sum = 0;
for (i = offset; i < offset+length ; i++) {
sum += flash[i];
}
/* Display information: */
printf("Image: %s\n",name);
printf("unknown1: %08x\n",unknown1);
printf("offset: %08x\n",offset);
printf("length: %08x\n",length);
printf("loadaddr: %08x\n",loadaddr);
printf("unknown2: %08x\n",unknown2);
printf("checksum: %08x (flashsplit sum: %08x)\n",checksum,sum);
printf("version: %08x (ipod model: %s)\n",version,modelname);
printf("unknown3: %08x\n",unknown3);
printf("\n");
if (modelname == NULL) {
printf("Unknown version, not exporting to .ipod file\n");
return;
} else if (checksum != sum) {
printf("Checksum mismatch, not exporting to .ipod file\n");
} else {
sum += get_modelnum(version);
int2be(sum,header);
memcpy(header+4,modelname,4);
sprintf(filename,"%s.ipod",name);
outfile = open(filename,O_CREAT|O_TRUNC|O_WRONLY,0666);
if (outfile < 0) {
fprintf(stderr,"[ERR] Couldn't open file %s\n",filename);
return;
}
write(outfile,header,8);
write(outfile,flash+offset,length);
close(outfile);
}
sprintf(filename,"%s.bin",name);
outfile = open(filename,O_CREAT|O_TRUNC|O_WRONLY,0666);
if (outfile < 0) {
fprintf(stderr,"[ERR] Couldn't open file %s\n",filename);
return;
}
write(outfile,flash+offset,length);
close(outfile);
}
int main(int argc,char* argv[])
{
int fd;
unsigned char buf[1024*1024];
unsigned char* p;
if (argc != 2) {
fprintf(stderr,"Usage: flashsplit flash.bin\n");
return 1;
}
fd=open(argv[1],O_RDONLY);
if (fd < 0) {
fprintf(stderr,"Can not open %s\n",argv[1]);
return 1;
}
read(fd,buf,sizeof(buf));
close(fd);
p = buf + 0xffe00; /* Start of flash directory */
while (le2int(p) != 0) {
if (memcmp(p,"hslfksid",8)==0) {
dump_app("diskmode",p,buf);
} else if (memcmp(p,"hslfgaid",8)==0) {
dump_app("diagmode",p,buf);
} else if (memcmp(p,"hslfogol",8)==0) {
dump_app("logo",p,buf);
} else if (memcmp(p,"hslfnacs",8)==0) {
dump_app("diskscan",p,buf);
} else if (memcmp(p,"hslfscmv",8)==0) {
dump_app("vmcs",p,buf);
} else {
printf("Unknown image type - %c%c%c%c%c%c%c%c\n",p[3],p[2],p[1],p[0],p[7],p[6],p[5],p[4]);
}
p += 0x28;
}
return 0;
}
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