diff options
Diffstat (limited to 'tools/firmware-utils')
| -rw-r--r-- | tools/firmware-utils/Makefile | 1 | ||||
| -rw-r--r-- | tools/firmware-utils/src/mkmerakifw-old.c | 369 |
2 files changed, 370 insertions, 0 deletions
diff --git a/tools/firmware-utils/Makefile b/tools/firmware-utils/Makefile index f4a5222..803ada4 100644 --- a/tools/firmware-utils/Makefile +++ b/tools/firmware-utils/Makefile @@ -74,6 +74,7 @@ define Host/Compile $(call cc,dgn3500sum) $(call cc,edimax_fw_header, -Wall) $(call cc,mkmerakifw sha1, -Wall) + $(call cc,mkmerakifw-old, -Wall) $(call cc,jcgimage, -lz -Wall) endef diff --git a/tools/firmware-utils/src/mkmerakifw-old.c b/tools/firmware-utils/src/mkmerakifw-old.c new file mode 100644 index 0000000..01b9b31 --- /dev/null +++ b/tools/firmware-utils/src/mkmerakifw-old.c @@ -0,0 +1,369 @@ +/* + * Copyright (C) 2015 Thomas Hebb <tommyhebb@gmail.com> + * Copyright (C) 2016 Christian Lamparter <chunkeey@googlemail.com> + * + * The format of the header this tool generates was first documented by + * Chris Blake <chrisrblake93 (at) gmail.com> in a shell script of the + * same purpose. I have created this reimplementation at his request. The + * original script can be found at: + * <https://github.com/riptidewave93/meraki-partbuilder> + * + * Support for the old header format, which is used by the Cisco Z1 AP + * has been reverse engineered from the nandloader's nand_load_bk function. + * The original code is part of Cisco's GPL code and can be found at: + * <https://github.com/riptidewave93/meraki-linux> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdbool.h> +#include <string.h> +#include <libgen.h> +#include <endian.h> +#include <getopt.h> +#include <errno.h> +#include <arpa/inet.h> + +#define PADDING_BYTE 0xff + +#define HDR_LENGTH 0x00000020 +#define HDR_OFF_MAGIC1 0 +#define HDR_OFF_LOAD_ADDR 4 +#define HDR_OFF_IMAGELEN 8 +#define HDR_OFF_ENTRY 12 +#define HDR_OFF_CHECKSUM 16 +#define HDR_OFF_FILLER0 20 +#define HDR_OFF_FILLER1 24 +#define HDR_OFF_FILLER2 28 + +struct board_info { + char *id; + char *description; + uint32_t magic; + uint32_t imagelen; + uint32_t load_addr; + uint32_t entry; +}; + +/* + * Globals + */ +static char *progname; +static bool strip_padding; + +static char *board_id; +static const struct board_info *board; + +static const struct board_info boards[] = { + { + .id = "z1", + .description = "Meraki Z1 Access Point", + .magic = 0x4d495053, + .imagelen = 0x007e0000, + .load_addr = 0x80060000, + .entry = 0x80060000 + }, { + /* terminating entry */ + } +}; + +/* + * Message macros + */ +#define ERR(fmt, ...) do { \ + fflush(0); \ + fprintf(stderr, "[%s] *** error: " fmt "\n", \ + progname, ## __VA_ARGS__); \ +} while (0) + +#define ERRS(fmt, ...) do { \ + int save = errno; \ + fflush(0); \ + fprintf(stderr, "[%s] *** error: " fmt "\n", \ + progname, ## __VA_ARGS__, strerror(save)); \ +} while (0) + +static const struct board_info *find_board(const char *id) +{ + const struct board_info *ret; + const struct board_info *board; + + ret = NULL; + for (board = boards; board->id != NULL; board++) { + if (strcasecmp(id, board->id) == 0) { + ret = board; + break; + } + } + + return ret; +} + +static void usage(int status) +{ + FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout; + const struct board_info *board; + + fprintf(stream, "Usage: %s [OPTIONS...]\n", progname); + fprintf(stream, +"\n" +"Options:\n" +" -B <board> create image for the board specified with <board>\n" +" -i <file> read kernel image from the file <file>\n" +" -o <file> write output to the file <file>\n" +" -s strip padding from the end of the image\n" +" -h show this screen\n" + ); + + fprintf(stream, "\nBoards:\n"); + for (board = boards; board->id != NULL; board++) + fprintf(stream, " %-16s%s\n", board->id, board->description); + + exit(status); +} + +static void writel(unsigned char *buf, size_t offset, uint32_t value) +{ + value = htobe32(value); + memcpy(buf + offset, &value, sizeof(uint32_t)); +} + +static const uint32_t crc32_table[] = { + 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, + 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, + 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, + 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, + 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, + 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, + 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, + 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, + 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, + 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, + 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, + 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, + 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, + 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, + 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, + 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, + 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, + 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, + 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, + 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, + 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, + 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, + 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, + 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, + 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, + 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, + 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, + 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, + 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, + 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, + 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, + 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, + 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, + 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, + 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, + 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, + 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, + 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, + 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, + 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, + 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, + 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, + 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, + 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, + 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, + 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, + 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, + 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, + 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, + 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, + 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, + 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, + 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, + 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, + 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, + 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, + 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, + 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, + 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, + 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, + 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, + 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, + 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, + 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, +}; + +static inline uint32_t crc32_accumulate_8(const uint32_t crc, const uint8_t ch) +{ + return crc32_table[(crc ^ ch) & 0xff] ^ (crc >> 8); +} + +static void crc32_csum(uint8_t *buf, const size_t len) +{ + uint32_t crc; + size_t i; + + crc = ~0; + for (i = 0; i < len; i += 4) { + crc = crc32_accumulate_8(crc, buf[i + 3]); + crc = crc32_accumulate_8(crc, buf[i + 2]); + crc = crc32_accumulate_8(crc, buf[i + 1]); + crc = crc32_accumulate_8(crc, buf[i]); + } + crc = ~crc; + + writel(buf, HDR_OFF_CHECKSUM, crc); +} + + +static int meraki_build_hdr(const struct board_info *board, const size_t klen, + FILE *out, FILE *in) +{ + unsigned char *kernel; + unsigned char *buf; + size_t buflen; + size_t kspace; + + size_t rc; + buflen = board->imagelen; + kspace = buflen - HDR_LENGTH; + + if (klen > kspace) { + ERR("kernel file is too big - max size: 0x%08lX\n", kspace); + return EXIT_FAILURE; + } + + /* If requested, resize buffer to remove padding */ + if (strip_padding) + buflen = klen + HDR_LENGTH; + + /* Allocate and initialize buffer for final image */ + buf = malloc(buflen); + if (buf == NULL) { + ERRS("no memory for buffer: %s\n"); + return EXIT_FAILURE; + } + memset(buf, PADDING_BYTE, buflen); + + /* Load kernel */ + kernel = buf + HDR_LENGTH; + fread(kernel, klen, 1, in); + + /* Write magic values and filler */ + writel(buf, HDR_OFF_MAGIC1, board->magic); + writel(buf, HDR_OFF_FILLER0, 0); + writel(buf, HDR_OFF_FILLER1, 0); + writel(buf, HDR_OFF_FILLER2, 0); + + /* Write load and kernel entry point address */ + writel(buf, HDR_OFF_LOAD_ADDR, board->load_addr); + writel(buf, HDR_OFF_ENTRY, board->entry); + + /* Write header and image length */ + writel(buf, HDR_OFF_IMAGELEN, klen); + + /* this gets replaced later, after the checksum has been calculated */ + writel(buf, HDR_OFF_CHECKSUM, 0); + + /* Write checksum */ + crc32_csum(buf, klen + HDR_LENGTH); + + rc = fwrite(buf, buflen, 1, out); + + free(buf); + + return rc == 1 ? EXIT_SUCCESS : EXIT_FAILURE; +} + +int main(int argc, char *argv[]) +{ + int ret = EXIT_FAILURE; + char *ofname = NULL, *ifname = NULL; + FILE *out, *in; + size_t klen; + + progname = basename(argv[0]); + + while (1) { + int c; + + c = getopt(argc, argv, "B:i:o:sh"); + if (c == -1) + break; + + switch (c) { + case 'B': + board_id = optarg; + break; + case 'i': + ifname = optarg; + break; + case 'o': + ofname = optarg; + break; + case 's': + strip_padding = true; + break; + case 'h': + usage(EXIT_SUCCESS); + break; + default: + usage(EXIT_FAILURE); + break; + } + } + + if (board_id == NULL) { + ERR("no board specified"); + goto err; + } + + board = find_board(board_id); + if (board == NULL) { + ERR("unknown board \"%s\"", board_id); + goto err; + } + + if (ifname == NULL) { + ERR("no input file specified"); + goto err; + } + + if (ofname == NULL) { + ERR("no output file specified"); + goto err; + } + + in = fopen(ifname, "r"); + if (in == NULL) { + ERRS("could not open \"%s\" for reading: %s", ifname); + goto err; + } + + /* Get kernel length */ + fseek(in, 0, SEEK_END); + klen = ftell(in); + rewind(in); + + out = fopen(ofname, "w"); + if (out == NULL) { + ERRS("could not open \"%s\" for writing: %s", ofname); + goto err_close_in; + } + + ret = meraki_build_hdr(board, klen, out, in); + fclose(out); + +err_close_in: + fclose(in); + +err: + return ret; +} |