/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * 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 #include #include #include #include #include #ifdef __APPLE__ #include #define htole32(x) OSSwapHostToLittleInt32(x) #else #include /* TODO: find portable alternative */ #endif #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)); /* 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; }