diff options
Diffstat (limited to 'tools/mkspl-x1000.c')
| -rw-r--r-- | tools/mkspl-x1000.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/tools/mkspl-x1000.c b/tools/mkspl-x1000.c new file mode 100644 index 0000000000..e27fe8e25b --- /dev/null +++ b/tools/mkspl-x1000.c @@ -0,0 +1,248 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2021 Aidan MacDonald + * + * 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 <stddef.h> +#include <stdint.h> +#include <stdio.h> +#include <string.h> +#include <stdarg.h> +#include <stdlib.h> +#include <endian.h> /* TODO: find portable alternative */ + +#define SPL_HEADER_SIZE 512 +#define SPL_KEY_SIZE 1536 +#define SPL_CODE_OFFSET (SPL_HEADER_SIZE + SPL_KEY_SIZE) + +#define SPL_MAX_SIZE (12 * 1024) +#define SPL_CODE_SIZE (SPL_MAX_SIZE - SPL_CODE_OFFSET) + +#define FLASH_TYPE_NAND 0x00 +#define FLASH_TYPE_NOR 0xaa + +struct flash_sig { + uint8_t magic[8]; /* fixed magic bytes */ + uint8_t type; /* flash type, either NAND or NOR */ + uint8_t crc7; /* CRC7 of SPL code */ + uint8_t ppb; /* pages per block for NAND */ + uint8_t bpp; /* bytes per page for NAND */ + uint32_t length; /* total size of SPL, including header/key */ +}; + +static const uint8_t flash_sig_magic[8] = + {0x06, 0x05, 0x04, 0x03, 0x02, 0x55, 0xaa, 0x55}; + +/* calculate CRC7 used in flash header */ +uint8_t crc7(const uint8_t* buf, size_t len) +{ + /* table-based computation of CRC7 */ + static const uint8_t t[256] = { + 0x00, 0x09, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f, + 0x48, 0x41, 0x5a, 0x53, 0x6c, 0x65, 0x7e, 0x77, + 0x19, 0x10, 0x0b, 0x02, 0x3d, 0x34, 0x2f, 0x26, + 0x51, 0x58, 0x43, 0x4a, 0x75, 0x7c, 0x67, 0x6e, + 0x32, 0x3b, 0x20, 0x29, 0x16, 0x1f, 0x04, 0x0d, + 0x7a, 0x73, 0x68, 0x61, 0x5e, 0x57, 0x4c, 0x45, + 0x2b, 0x22, 0x39, 0x30, 0x0f, 0x06, 0x1d, 0x14, + 0x63, 0x6a, 0x71, 0x78, 0x47, 0x4e, 0x55, 0x5c, + 0x64, 0x6d, 0x76, 0x7f, 0x40, 0x49, 0x52, 0x5b, + 0x2c, 0x25, 0x3e, 0x37, 0x08, 0x01, 0x1a, 0x13, + 0x7d, 0x74, 0x6f, 0x66, 0x59, 0x50, 0x4b, 0x42, + 0x35, 0x3c, 0x27, 0x2e, 0x11, 0x18, 0x03, 0x0a, + 0x56, 0x5f, 0x44, 0x4d, 0x72, 0x7b, 0x60, 0x69, + 0x1e, 0x17, 0x0c, 0x05, 0x3a, 0x33, 0x28, 0x21, + 0x4f, 0x46, 0x5d, 0x54, 0x6b, 0x62, 0x79, 0x70, + 0x07, 0x0e, 0x15, 0x1c, 0x23, 0x2a, 0x31, 0x38, + 0x41, 0x48, 0x53, 0x5a, 0x65, 0x6c, 0x77, 0x7e, + 0x09, 0x00, 0x1b, 0x12, 0x2d, 0x24, 0x3f, 0x36, + 0x58, 0x51, 0x4a, 0x43, 0x7c, 0x75, 0x6e, 0x67, + 0x10, 0x19, 0x02, 0x0b, 0x34, 0x3d, 0x26, 0x2f, + 0x73, 0x7a, 0x61, 0x68, 0x57, 0x5e, 0x45, 0x4c, + 0x3b, 0x32, 0x29, 0x20, 0x1f, 0x16, 0x0d, 0x04, + 0x6a, 0x63, 0x78, 0x71, 0x4e, 0x47, 0x5c, 0x55, + 0x22, 0x2b, 0x30, 0x39, 0x06, 0x0f, 0x14, 0x1d, + 0x25, 0x2c, 0x37, 0x3e, 0x01, 0x08, 0x13, 0x1a, + 0x6d, 0x64, 0x7f, 0x76, 0x49, 0x40, 0x5b, 0x52, + 0x3c, 0x35, 0x2e, 0x27, 0x18, 0x11, 0x0a, 0x03, + 0x74, 0x7d, 0x66, 0x6f, 0x50, 0x59, 0x42, 0x4b, + 0x17, 0x1e, 0x05, 0x0c, 0x33, 0x3a, 0x21, 0x28, + 0x5f, 0x56, 0x4d, 0x44, 0x7b, 0x72, 0x69, 0x60, + 0x0e, 0x07, 0x1c, 0x15, 0x2a, 0x23, 0x38, 0x31, + 0x46, 0x4f, 0x54, 0x5d, 0x62, 0x6b, 0x70, 0x79 + }; + + uint8_t crc = 0; + while(len--) + crc = t[(crc << 1) ^ *buf++]; + return crc; +} + +void die(const char* msg, ...) +{ + va_list ap; + va_start(ap, msg); + vfprintf(stderr, msg, ap); + fprintf(stderr, "\n"); + va_end(ap); + exit(1); +} + +void do_flash(const uint8_t* spl_code, + uint32_t spl_length, + int flash_type, + int pages_per_block, + int bytes_per_block, + FILE* outfile) +{ + /* verify parameters */ + if(flash_type != FLASH_TYPE_NAND + && flash_type != FLASH_TYPE_NOR) { + die("invalid flash type"); + } + + if(pages_per_block < 0 || pages_per_block > 0xff) + die("invalid pages_per_block"); + + if(bytes_per_block < 0 || bytes_per_block > 0xff) + die("invalid bytes_per_block"); + + /* fill flash signature */ + struct flash_sig sig; + memcpy(sig.magic, flash_sig_magic, 8); + sig.type = flash_type & 0xff; + sig.crc7 = crc7(spl_code, spl_length); + sig.ppb = pages_per_block & 0xff; + sig.bpp = bytes_per_block & 0xff; + sig.length = htole32(spl_length + SPL_HEADER_SIZE + SPL_KEY_SIZE); + + /* construct header */ + uint8_t hdr_buf[SPL_HEADER_SIZE]; + memset(hdr_buf, 0, SPL_HEADER_SIZE); + memcpy(hdr_buf, &sig, sizeof(sig)); + hdr_buf[sizeof(sig)] = 1; /* ??? used in the FiiO M3K */ + + /* create null key */ + uint8_t null_key[SPL_KEY_SIZE]; + memset(null_key, 0, SPL_KEY_SIZE); + + /* write everything out */ + if(fwrite(hdr_buf, SPL_HEADER_SIZE, 1, outfile) != 1) + die("error writing output"); + if(fwrite(null_key, SPL_KEY_SIZE, 1, outfile) != 1) + die("error writing output"); + if(fwrite(spl_code, spl_length, 1, outfile) != 1) + die("error writing output"); +} + +uint8_t* read_input(const char* filename, uint32_t* rlength, int maxlen) +{ + /* open file */ + FILE* f = fopen(filename, "rb"); + if(!f) + die("cannot open input file: %s", filename); + + /* get size */ + fseek(f, 0, SEEK_END); + int sz = ftell(f); + + /* check size */ + if(sz < 0) + die("error seeking in input file"); + if(sz > maxlen) + die("input is too big (size: %d, max: %d)", sz, maxlen); + + /* allocate buffer */ + uint8_t* buf = malloc(sz); + if(!buf) + die("out of memory"); + + /* read file data */ + fseek(f, 0, SEEK_SET); + if(fread(buf, sz, 1, f) != 1) + die("error reading input file"); + + /* close file */ + fclose(f); + + /* return buffer and size */ + *rlength = sz; + return buf; +} + +int main(int argc, const char* argv[]) +{ + /* variables */ + int flash_type = -1; + int pages_per_block = -1; + int bytes_per_page = -1; + uint8_t* spl_code = NULL; + uint32_t spl_length = 0; + const char* outfile_name = NULL; + + for(int i = 1; i < argc; ++i) { + if(strncmp(argv[i], "-type=", 6) == 0) { + if(strcmp(argv[i]+6, "nand") == 0) + flash_type = FLASH_TYPE_NAND; + else if(strcmp(argv[i]+6, "nor") == 0) + flash_type = FLASH_TYPE_NOR; + else + die("invalid type: %s", argv[i]+6); + } else if(strncmp(argv[i], "-ppb=", 5) == 0) { + pages_per_block = atoi(argv[i]+5); + } else if(strncmp(argv[i], "-bpp=", 5) == 0) { + bytes_per_page = atoi(argv[i]+5); + } else if(spl_code == NULL) { + spl_code = read_input(argv[i], &spl_length, SPL_CODE_SIZE); + } else if(!outfile_name) { + outfile_name = argv[i]; + } else { + die("too many arguments: %s", argv[i]); + } + } + + if(flash_type < 0) + die("must specify -type"); + + if(flash_type == FLASH_TYPE_NAND) { + if(pages_per_block < 0) + die("must specify -ppb with -type nand"); + if(bytes_per_page < 0) + die("must specify -bpp with -type nand"); + } else { + pages_per_block = 0; + bytes_per_page = 0; + } + + if(spl_code == NULL) + die("no input file given"); + + if(!outfile_name) + die("no output file given"); + + FILE* outfile = fopen(outfile_name, "wb"); + if(!outfile) + die("cannot open output file: %s", outfile_name); + + do_flash(spl_code, spl_length, flash_type, + pages_per_block, bytes_per_page, outfile); + + fclose(outfile); + return 0; +} |