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Windows appears to require sector-aligned reads, which wasn't happening everywhere for ipods with 2048-byte sectors.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11770 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2006-12-15 15:52:08 +00:00
parent 408c65bb21
commit d772977c65
1 changed files with 47 additions and 23 deletions
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70
tools/ipodpatcher/ipodpatcher.c
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@ -475,6 +475,7 @@ int add_bootloader(HANDLE dh, char* filename, int start, int sector_size,
{
int length;
int i;
int x;
int n;
int infile;
int paddedlength;
@ -625,27 +626,28 @@ int add_bootloader(HANDLE dh, char* filename, int start, int sector_size,
fprintf(stderr,"[INFO] Wrote %d bytes to firmware partition\n",entryOffset+paddedlength);
x = diroffset % sector_size;
/* Read directory */
if (ipod_seek(dh,start + diroffset) < 0) { return -1; }
if (ipod_seek(dh,start + diroffset - x) < 0) { return -1; }
n=ipod_read(dh, sectorbuf, sector_size);
if (n < 0) { return -1; }
/* Update entries for image 0 */
int2le(entryOffset+length,sectorbuf+16);
int2le(entryOffset,sectorbuf+24);
int2le(chksum,sectorbuf+28);
int2le(entryOffset+length,sectorbuf+x+16);
int2le(entryOffset,sectorbuf+x+24);
int2le(chksum,sectorbuf+x+28);
/* Update devOffset entries for other images, if we have moved them */
if (delta > 0) {
for (i=1;i<nimages;i++) {
int2le(le2int(sectorbuf+i*40+12)+delta,sectorbuf+i*40+12);
int2le(le2int(sectorbuf+x+i*40+12)+delta,sectorbuf+x+i*40+12);
}
}
/* Write directory */
if (ipod_seek(dh,start + diroffset) < 0) { return -1; }
if (ipod_seek(dh,start + diroffset - x) < 0) { return -1; }
n=ipod_write(dh, sectorbuf, sector_size);
if (n < 0) { return -1; }
@ -657,6 +659,7 @@ int delete_bootloader(HANDLE dh, int start, int sector_size, off_t diroffset,
{
int length;
int i;
int x;
int n;
unsigned long chksum=0; /* 32 bit checksum - Rockbox .ipod style*/
@ -704,19 +707,21 @@ int delete_bootloader(HANDLE dh, int start, int sector_size, off_t diroffset,
fprintf(stderr,"[INFO] Updating firmware checksum\n");
x = diroffset % sector_size;
/* Read directory */
if (ipod_seek(dh,start + diroffset) < 0) { return -1; }
if (ipod_seek(dh,start + diroffset - x) < 0) { return -1; }
n=ipod_read(dh, sectorbuf, sector_size);
if (n < 0) { return -1; }
/* Update entries for image 0 */
int2le(length,sectorbuf+16);
int2le(0,sectorbuf+24);
int2le(chksum,sectorbuf+28);
int2le(length,sectorbuf+x+16);
int2le(0,sectorbuf+x+24);
int2le(chksum,sectorbuf+x+28);
/* Write directory */
if (ipod_seek(dh,start + diroffset) < 0) { return -1; }
if (ipod_seek(dh,start + diroffset - x) < 0) { return -1; }
n=ipod_write(dh, sectorbuf, sector_size);
if (n < 0) { return -1; }
@ -729,6 +734,7 @@ int write_firmware(HANDLE dh, char* filename, int start, int sector_size,
{
int length;
int i;
int x;
int n;
int infile;
int newsize;
@ -834,19 +840,21 @@ int write_firmware(HANDLE dh, char* filename, int start, int sector_size,
chksum += sectorbuf[i];
}
x = diroffset % sector_size;
/* Read directory */
if (ipod_seek(dh,start + diroffset) < 0) { return -1; }
if (ipod_seek(dh,start + diroffset - x) < 0) { return -1; }
n=ipod_read(dh, sectorbuf, sector_size);
if (n < 0) { return -1; }
/* Update entries for image 0 */
int2le(length,sectorbuf+16);
int2le(0,sectorbuf+24);
int2le(chksum,sectorbuf+28);
int2le(length,sectorbuf+x+16);
int2le(0,sectorbuf+x+24);
int2le(chksum,sectorbuf+x+28);
/* Write directory */
if (ipod_seek(dh,start + diroffset) < 0) { return -1; }
if (ipod_seek(dh,start + diroffset - x) < 0) { return -1; }
n=ipod_write(dh, sectorbuf, sector_size);
if (n < 0) { return -1; }
@ -917,16 +925,23 @@ int read_directory(HANDLE dh, int start, int sector_size,
struct ipod_directory_t* ipod_directory, off_t* diroffset)
{
int n;
int x;
int nimages;
unsigned char* p;
/* Read firmware partition header (first 512 bytes of disk - but
let's read a whole sector) */
if (ipod_seek(dh, start) < 0) { return -1; }
if (ipod_seek(dh, start) < 0) {
fprintf(stderr,"[ERR] Seek to 0x%08x in read_directory() failed.\n",start);
return -1;
}
n=ipod_read(dh, sectorbuf, sector_size);
if (n < 0) { return -1; }
if (n < 0) {
fprintf(stderr,"[ERR] ipod_read(dh,buf,0x%08x) failed in read_directory()\n",sector_size);
return -1;
}
if (memcmp(sectorbuf,apple_stop_sign,sizeof(apple_stop_sign))!=0) {
fprintf(stderr,"[ERR] Firmware partition doesn't contain Apple copyright, aborting.");
@ -940,16 +955,25 @@ int read_directory(HANDLE dh, int start, int sector_size,
*diroffset=le2int(sectorbuf+0x104) + 0x200;
/* diroffset may not be sector-aligned */
x = *diroffset % sector_size;
/* Read directory */
if (ipod_seek(dh,start + *diroffset) < 0) { return -1; }
if (ipod_seek(dh,start + *diroffset - x) < 0) {
fprintf(stderr,"[ERR] Seek to diroffset (%08x) failed.\n",(unsigned)*diroffset);
return -1;
}
n=ipod_read(dh, sectorbuf, sector_size);
if (n < 0) { return -1; }
if (n < 0) {
fprintf(stderr,"[ERR] Read of directory failed.\n");
return -1;
}
nimages=0;
p = sectorbuf;
p = sectorbuf + x;
while ((nimages < MAX_IMAGES) && (p < (sectorbuf + 400)) &&
while ((nimages < MAX_IMAGES) && (p < (sectorbuf + x + 400)) &&
(memcmp(p,"!ATA",4)==0)) {
p+=4;
if (memcmp(p,"soso",4)==0) {
@ -1161,7 +1185,7 @@ int main(int argc, char* argv[])
nimages=read_directory(dh, pinfo[0].start*sector_size, sector_size,
ipod_directory, &diroffset);
if (nimages <= 0) {
fprintf(stderr,"[ERR] Failed to read firmware directory\n");
fprintf(stderr,"[ERR] Failed to read firmware directory - nimages=%d\n",nimages);
return 1;
}