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Initial support for creating ipod firmware partition images. Only tested on an ipod photo so far, and will definitely not work on either a 3g or a 5g. If you never want to use the Apple firmware, you can create a firmware partition image containing just the Rockbox bootloader with the command "../tools/scramble -ipod bootloader/bootloader.bin bootloader.img" and then write bootloader.img to your firmware partition.

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10275 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2006-07-21 16:16:48 +00:00
parent eec48a8956
commit c52ae7abe7
1 changed files with 113 additions and 0 deletions
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113
tools/scramble.c
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@ -23,6 +23,7 @@
#include "iriver.h"
int iaudio_encode(char *iname, char *oname, char *idstring);
int ipod_encode(char *iname, char *oname, int fw_ver);
enum
{
@ -42,6 +43,12 @@ int size_limit[] =
0x64000 /* ARCHOS_ONDIO_FM */
};
void short2le(unsigned short val, unsigned char* addr)
{
addr[0] = val & 0xFF;
addr[1] = (val >> 8) & 0xff;
}
void int2le(unsigned int val, unsigned char* addr)
{
addr[0] = val & 0xFF;
@ -211,6 +218,11 @@ int main (int argc, char** argv)
oname = argv[3];
return iaudio_encode(iname, oname, "COWON_X5V_FW");
}
else if(!strcmp(argv[1], "-ipod")) {
iname = argv[2];
oname = argv[3];
return ipod_encode(iname, oname, 3); /* Firmware image v3 */
}
/* open file */
file = fopen(iname,"rb");
@ -437,3 +449,104 @@ int iaudio_encode(char *iname, char *oname, char *idstring)
fclose(file);
}
/* Create an ipod firmware partition image
fw_ver = 2 for 3rd Gen ipods, 3 for all later ipods including 5g.
This function doesn't yet handle the Broadcom resource image for the 5g,
so the resulting images won't be usable.
This has also only been tested on an ipod Photo
*/
int ipod_encode(char *iname, char *oname, int fw_ver)
{
static const char *apple_stop_sign = "{{~~ /-----\\ "\
"{{~~ / \\ "\
"{{~~| | "\
"{{~~| S T O P | "\
"{{~~| | "\
"{{~~ \\ / "\
"{{~~ \\-----/ "\
"Copyright(C) 200"\
"1 Apple Computer"\
", Inc.----------"\
"----------------"\
"----------------"\
"----------------"\
"----------------"\
"----------------"\
"---------------";
size_t len;
int length;
FILE *file;
unsigned char *outbuf;
int i;
unsigned int sum = 0;
file = fopen(iname, "rb");
if (!file) {
perror(iname);
return -1;
}
fseek(file,0,SEEK_END);
length = ftell(file);
fseek(file,0,SEEK_SET);
outbuf = malloc(length+0x4600);
if ( !outbuf ) {
printf("out of memory!\n");
return -1;
}
len = fread(outbuf+0x4600, 1, length, file);
if(len < length) {
perror(iname);
return -2;
}
fclose(file);
/* Calculate checksum for later use in header */
for(i = 0x4600; i < 0x4600+length;i++)
sum += outbuf[i];
/* Clear the header area to zero */
memset(outbuf, 0, 0x4600);
/* APPLE STOP SIGN */
strcpy((char *)outbuf, apple_stop_sign);
/* VOLUME HEADER */
memcpy(&outbuf[0x100],"]ih[",4); /* Magic */
int2le(0x4000, &outbuf[0x104]); /* Firmware offset relative to 0x200 */
short2le(0x10c, &outbuf[0x108]); /* Location of extended header */
short2le(fw_ver, &outbuf[0x10a]);
/* Firmware Directory - "osos" entry */
memcpy(&outbuf[0x4200],"!ATAsoso",8); /* dev and type */
int2le(0, &outbuf[0x4208]); /* id */
int2le(0x4400, &outbuf[0x420c]); /* devOffset */
int2le(length, &outbuf[0x4210]); /* Length of firmware */
int2le(0x10000000, &outbuf[0x4214]); /* Addr */
int2le(0, &outbuf[0x4218]); /* Entry Offset */
int2le(sum, &outbuf[0x421c]); /* Checksum */
int2le(0x00006012, &outbuf[0x4220]); /* vers - 0x6012 is a guess */
int2le(0xffffffff, &outbuf[0x4224]); /* LoadAddr - for flash images */
file = fopen(oname, "wb");
if (!file) {
perror(oname);
return -3;
}
len = fwrite(outbuf, 1, length+0x4600, file);
if(len < length) {
perror(oname);
return -4;
}
fclose(file);
}