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iPod Classic: NOR support for bootloader

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- NOR driver (based on emCORE)
- read/write IM3 images
- read 'flsh' files

Change-Id: Ie0654e0d298affc0f47ed64b823767118bd1aa3f
This commit is contained in:
Cástor Muñoz 2016-02-05 00:49:33 +01:00
parent bf89c757dd
commit 7083110f81
3 changed files with 537 additions and 0 deletions
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167
firmware/target/arm/s5l8702/nor-target.h Normal file
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id:
*
* Copyright © 2009 Michael Sparmann
*
* 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.
*
****************************************************************************/
#ifndef __NOR_TARGET_H__
#define __NOR_TARGET_H__
#include <stdint.h>
#include <stdbool.h>
#include "config.h"
#include "crypto-s5l8702.h"
/* NOR memory map (Classic 6G):
*
* 1MB ______________
* | |
* | flsh DIR |
* 1MB-0x200 |______________|
* | |
* | File 1 |
* |..............|
* | |
* | File 2 |
* |..............|
* | |
* . .
* . .
* . .
* | |
* |..............|
* | |
* | File N |
* |______________|
* | |
* | |
* | |
* | | IM3 (128KB)
* | Unused | . . . . . . ______________
* | | / | |
* | | / | |
* | | / | |
* 160KB |______________|/ | |
* | | | |
* | | | EFI |
* | Original | | Volumen |
* | NOR Boot | | |
* | | | |
* | | | |
* 32KB |______________| | |
* | |\ 0x800 |______________|
* | | \ | |
* | | \ | IM3 Header |
* |______________| \ . . . . . . |______________|
* | |
* | SysCfg |
* 0 |______________|
*/
#define SPI_PORT 0
#define NOR_SZ 0x100000
#define NORBOOT_OFF 0x8000
#define NORBOOT_MAXSZ 0x20000
void bootflash_init(int port);
void bootflash_read(int port, uint32_t addr, uint32_t size, void* buf);
void bootflash_write(int port, int offset, void* addr, int size);
int bootflash_compare(int port, int offset, void* addr, int size);
void bootflash_erase_blocks(int port, int first, int n);
void bootflash_close(int port);
/*
* IM3
*/
#define IM3_IDENT "8702"
#define IM3_VERSION "1.0"
#define IM3HDR_SZ 0x800
#define IM3INFO_SZ (sizeof(struct Im3Info))
#define IM3INFOSIGN_SZ (offsetof(struct Im3Info, info_sign))
#define SIGN_SZ 16
struct Im3Info
{
uint8_t ident[4];
uint8_t version[3];
uint8_t enc_type;
uint8_t entry[4]; /* LE */
uint8_t data_sz[4]; /* LE */
union {
struct {
uint8_t data_sign[SIGN_SZ];
uint8_t _reserved[32];
} enc12;
struct {
uint8_t sign_off[4]; /* LE */
uint8_t cert_off[4]; /* LE */
uint8_t cert_sz[4]; /* LE */
uint8_t _reserved[36];
} enc34;
} u;
uint8_t info_sign[SIGN_SZ];
} __attribute__ ((packed));
struct Im3Hdr
{
struct Im3Info info;
uint8_t _zero[IM3HDR_SZ - sizeof(struct Im3Info)];
} __attribute__ ((packed));
unsigned im3_nor_sz(struct Im3Info* hinfo);
void im3_sign(uint32_t keyidx, void* data, uint32_t size, void* sign);
void im3_crypt(enum hwkeyaes_direction direction,
struct Im3Info *hinfo, void *fw_addr);
int im3_read(uint32_t offset, struct Im3Info *hinfo, void *fw_addr);
bool im3_write(int offset, void *im3_addr);
/*
* flsh FS
*/
#define DIR_SZ 0x200
#define DIR_OFF (NOR_SZ - DIR_SZ)
#define ENTRY_SZ ((int)sizeof(image_t))
#define MAX_ENTRY (DIR_SZ / ENTRY_SZ)
#define FILEHDR_SZ 0x200
/* from tools/ipod_fw.c */
typedef struct _image {
char type[4]; /* '' */
unsigned id; /* */
char pad1[4]; /* 0000 0000 */
unsigned devOffset; /* byte offset of start of image code */
unsigned len; /* length in bytes of image */
unsigned addr; /* load address */
unsigned entryOffset; /* execution start within image */
unsigned chksum; /* checksum for image */
unsigned vers; /* image version */
unsigned loadAddr; /* load address for image */
} image_t;
int flsh_get_info(int *used, int *unused);
unsigned flsh_get_unused(void);
int flsh_find_file(char *name, image_t *entry);
int flsh_load_file(image_t *entry, void *hdr, void *data);
#endif /* __NOR_TARGET_H__ */