[tools] firmware-utils: new firmware generation tool for the Cellvision CAS-6xx/NFS...
authorGabor Juhos <juhosg@openwrt.org>
Tue, 29 Jan 2008 08:31:54 +0000 (08:31 +0000)
committerGabor Juhos <juhosg@openwrt.org>
Tue, 29 Jan 2008 08:31:54 +0000 (08:31 +0000)
SVN-Revision: 10306

tools/firmware-utils/Makefile
tools/firmware-utils/src/mkcasfw.c [new file with mode: 0644]

index e5537b4..962e5d1 100644 (file)
@@ -1,4 +1,4 @@
-# 
+#
 # Copyright (C) 2006 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
@@ -28,6 +28,7 @@ define Build/Compile
        $(call cc,mkcsysimg)
        $(call cc,mkzynfw)
        $(call cc,lzma2eva,-lz)
+       $(call cc,mkcasfw)
 endef
 
 define Build/Install
diff --git a/tools/firmware-utils/src/mkcasfw.c b/tools/firmware-utils/src/mkcasfw.c
new file mode 100644 (file)
index 0000000..c8edc39
--- /dev/null
@@ -0,0 +1,1027 @@
+/*
+ *  $Id$
+ *
+ *  Copyright (C) 2007 OpenWrt.org
+ *  Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
+ *
+ *  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 <stdint.h>
+#include <string.h>
+#include <unistd.h>     /* for unlink() */
+#include <libgen.h>
+#include <getopt.h>     /* for getopt() */
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <endian.h>     /* for __BYTE_ORDER */
+#if defined(__CYGWIN__)
+#  include <byteswap.h>
+#endif
+
+#if (__BYTE_ORDER == __LITTLE_ENDIAN)
+#  define HOST_TO_LE16(x)      (x)
+#  define HOST_TO_LE32(x)      (x)
+#  define LE16_TO_HOST(x)      (x)
+#  define LE32_TO_HOST(x)      (x)
+#else
+#  define HOST_TO_LE16(x)      bswap_16(x)
+#  define HOST_TO_LE32(x)      bswap_32(x)
+#  define LE16_TO_HOST(x)      bswap_16(x)
+#  define LE32_TO_HOST(x)      bswap_32(x)
+#endif
+
+#define MAX_NUM_BLOCKS 2
+#define MAX_ARG_COUNT  32
+#define MAX_ARG_LEN    1024
+#define FILE_BUF_LEN   (16*1024)
+#define DEFAULT_PADC   0xFF
+
+#define DEFAULT_BLOCK_ALIGN    0x10000U
+
+#define CSUM_TYPE_NONE 0
+#define CSUM_TYPE_8    1
+#define CSUM_TYPE_16   2
+#define CSUM_TYPE_32   3
+
+struct csum_state{
+       int     size;
+       uint32_t val;
+       uint32_t tmp;
+       int     odd;
+};
+
+struct image_desc {
+       int             need_file;
+       char            *file_name;     /* name of the file */
+       uint32_t        file_size;      /* length of the file */
+
+       uint32_t        csum;
+       uint32_t        out_size;
+       uint8_t         padc;
+};
+
+struct fwhdr_nfs {
+       uint32_t        type;
+       uint32_t        kernel_offs;
+       uint32_t        kernel_size;
+       uint32_t        fs_offs;
+       uint32_t        fs_size;
+       uint32_t        kernel_csum;
+       uint32_t        fs_csum;
+       uint32_t        id;
+} __attribute__ ((packed));
+
+struct fwhdr_cas {
+       uint32_t        type;
+       uint32_t        kernel_offs;
+       uint32_t        kernel_size;
+       uint32_t        id;
+       uint32_t        kernel_csum;
+       uint32_t        magic1;
+       uint32_t        magic2;
+       uint32_t        magic3;
+} __attribute__ ((packed));
+
+union file_hdr {
+       struct fwhdr_cas cas;
+       struct fwhdr_nfs nfs;
+};
+
+struct board_info {
+       char            *model;
+       char            *name;
+       int             header_type;
+       uint32_t        id;
+       uint32_t        max_kernel_size;
+       uint32_t        max_fs_size;
+};
+
+#define HEADER_TYPE_NFS                0
+#define HEADER_TYPE_CAS                1
+
+#define KERNEL_SIZE_CAS                (61*64*1024)
+#define KERNEL_SIZE_NFS                (52*64*1024)
+#define FS_SIZE_NFS            (9*64*1024)
+
+#define CAS_MAGIC1     0x5241AA55
+#define CAS_MAGIC2     0x524F4741
+#define CAS_MAGIC3     0xD3F22D4E
+
+/* Cellvision/SparkLAN products */
+#define MODEL_CAS_630          0x01000000
+#define MODEL_CAS_630W         0x01000000
+#define MODEL_CAS_670          0x01000000
+#define MODEL_CAS_670W         0x01000000
+#define MODEL_NFS_101U         0x01000000
+#define MODEL_NFS_101WU                0x01000003
+#define MODEL_NFS_202U         0x01000001
+#define MODEL_NFS_202WU                0x01000002
+
+/* Corega products */
+#define MODEL_CG_NSADP         0x01000020 /* NFS-101U */
+#define MODEL_CG_NSADPCR       0x01000021 /* NFS-202U */
+
+/* D-Link products */
+#define MODEL_DCS_950          0x01010102 /* CAS-630 */
+#define MODEL_DCS_950G         0x01020102 /* CAS-630W */
+#define MODEL_DNS_120          0x01000030 /* NFS-101U */
+#define MODEL_DNS_G120         0x01000032 /* NFS-101WU */
+
+/* Digitus products */
+#define MODEL_DN_16021         MODEL_CAS_630
+#define MODEL_DN_16022         MODEL_CAS_630W
+#define MODEL_DN_16030         MODEL_CAS_670
+#define MODEL_DN_16031         MODEL_CAS_670W
+#define MODEL_DN_7013          MODEL_NFS_101U
+
+/* Lobos products */
+#define MODEL_LB_SS01TXU       0x00000000
+
+/* Neu-Fusion products */
+
+/* Ovislink products */
+#define MODEL_MU_5000FS                0x01000040 /* NFS-101U */
+
+/* Repotec products */
+
+/* Sitecom products */
+#define MODEL_LN_350           /* unknown */
+#define MODEL_LN_403           0x01020402
+#define MODEL_WL_401           0x01010402
+
+/* Surecom products */
+#define MODEL_EP_4001_MM       0x01030A02 /* CAS-630 */
+#define MODEL_EP_4002_MM       0x01020A02 /* CAS-630W */
+#define MODEL_EP_4011_MM       0x01010A02 /* CAS-670 */
+#define MODEL_EP_4012_MM       0x01000A02 /* CAS-670W */
+#define MODEL_EP_9812_U                /* unknown */
+
+/* Trendnet products */
+#define MODEL_TN_U100          0x01000081 /* NFS-101U */
+#define MODEL_TN_U200          0x01000081 /* NFS-202U */
+
+/*
+ * Globals
+ */
+char *progname;
+char *ofname;
+int verblevel;
+int keep_invalid_images;
+int invalid_causes_error = 1;
+union file_hdr header;
+
+struct image_desc kernel_image;
+struct image_desc fs_image;
+
+struct board_info *board = NULL;
+
+#define BOARD(m, n, i, ks, fs, h) {            \
+               .model = (m),                   \
+               .name = (n),                    \
+               .id = (i),                      \
+               .max_kernel_size = (ks),        \
+               .max_fs_size = (fs),            \
+               .header_type = (h)              \
+       }
+
+#define BOARD_CAS(m,n,i) \
+               BOARD(m, n, i, KERNEL_SIZE_CAS, 0, HEADER_TYPE_CAS)
+#define BOARD_NFS(m,n,i) \
+               BOARD(m, n, i, KERNEL_SIZE_NFS, FS_SIZE_NFS, HEADER_TYPE_NFS)
+
+static struct board_info boards[] = {
+       /* Cellvision/Sparklan products */
+       BOARD_CAS("CAS-630", "Cellvision CAS-630", MODEL_CAS_630),
+       BOARD_CAS("CAS-630W", "Cellvision CAS-630W", MODEL_CAS_630W),
+       BOARD_CAS("CAS-670", "Cellvision CAS-670", MODEL_CAS_670),
+       BOARD_CAS("CAS-670W", "Cellvision CAS-670W", MODEL_CAS_670W),
+       BOARD_NFS("NFS-101U", "Cellvision NFS-101U", MODEL_NFS_101U),
+       BOARD_NFS("NFS-101WU", "Cellvision NFS-101WU", MODEL_NFS_101WU),
+       BOARD_NFS("NFS-202U", "Cellvision NFS-202U", MODEL_NFS_202U),
+       BOARD_NFS("NFS-202WU", "Cellvision NFS-202WU", MODEL_NFS_202WU),
+
+       /* Corega products */
+       BOARD_NFS("CG-NSADP", "Corega CG-NSADP", MODEL_CG_NSADP),
+       BOARD_NFS("CG-NSADPCR", "Corega CG-NSADPCR", MODEL_CG_NSADPCR),
+
+       /* D-Link products */
+       BOARD_CAS("DCS-950", "D-Link DCS-950", MODEL_DCS_950),
+       BOARD_CAS("DCS-950G", "D-Link DCS-950G", MODEL_DCS_950G),
+       BOARD_NFS("DNS-120", "D-Link DNS-120", MODEL_DNS_120),
+       BOARD_NFS("DNS-G120", "D-Link DNS-G120", MODEL_DNS_G120),
+
+       /* Digitus products */
+       BOARD_NFS("DN-7013", "Digitus DN-7013", MODEL_DN_7013),
+
+       /* Lobos products */
+       BOARD_NFS("LB-SS01TXU", "Lobos LB-SS01TXU", MODEL_LB_SS01TXU),
+
+       /* Ovislink products */
+       BOARD_NFS("MU-5000FS", "Ovislink MU-5000FS", MODEL_MU_5000FS),
+
+       /* Sitecom products */
+       BOARD_CAS("LN-403", "Sitecom LN-403", MODEL_LN_403),
+       BOARD_CAS("WL-401", "Sitecom WL-401", MODEL_WL_401),
+
+       /* Surecom products */
+       BOARD_CAS("EP-4001-MM", "Surecom EP-4001-MM", MODEL_EP_4001_MM),
+       BOARD_CAS("EP-4002-MM", "Surecom EP-4002-MM", MODEL_EP_4002_MM),
+       BOARD_CAS("EP-4011-MM", "Surecom EP-4011-MM", MODEL_EP_4011_MM),
+       BOARD_CAS("EP-4012-MM", "Surecom EP-4012-MM", MODEL_EP_4012_MM),
+
+       /* TrendNET products */
+       BOARD_NFS("TN-U100", "TrendNET TN-U100", MODEL_TN_U100),
+       BOARD_NFS("TN-U200", "TrendNET TN-U200", MODEL_TN_U200),
+
+       {.model = NULL}
+};
+
+/*
+ * 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)
+
+#define WARN(fmt, ...) do { \
+       fprintf(stderr, "[%s] *** warning: " fmt "\n", \
+                       progname, ## __VA_ARGS__ ); \
+} while (0)
+
+#define DBG(lev, fmt, ...) do { \
+       if (verblevel < lev) \
+               break;\
+       fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
+} while (0)
+
+#define ERR_FATAL              -1
+#define ERR_INVALID_IMAGE      -2
+
+void
+usage(int status)
+{
+       FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
+       struct board_info *board;
+
+       fprintf(stream, "Usage: %s [OPTIONS...] <file>\n", progname);
+       fprintf(stream,
+"\n"
+"Options:\n"
+"  -B <board>      create image for the board specified with <board>.\n"
+"                  valid <board> values:\n"
+       );
+       for (board = boards; board->model != NULL; board++){
+               fprintf(stream,
+"                  %-12s: %s\n",
+                board->model, board->name);
+       };
+       fprintf(stream,
+"  -d              don't throw error on invalid images\n"
+"  -k              keep invalid images\n"
+"  -K <file>       add kernel to the image\n"
+"  -C <file>       add custom filesystem to the image\n"
+"  -h              show this screen\n"
+"Parameters:\n"
+"  <file>          write output to the file <file>\n"
+       );
+
+       exit(status);
+}
+
+static inline uint32_t align(uint32_t base, uint32_t alignment)
+{
+       uint32_t ret;
+
+       if (alignment) {
+               ret = (base + alignment - 1);
+               ret &= ~(alignment-1);
+       } else {
+               ret = base;
+       }
+
+       return ret;
+}
+
+/*
+ * argument parsing
+ */
+int
+str2u32(char *arg, uint32_t *val)
+{
+       char *err = NULL;
+       uint32_t t;
+
+       errno=0;
+       t = strtoul(arg, &err, 0);
+       if (errno || (err==arg) || ((err != NULL) && *err)) {
+               return -1;
+       }
+
+       *val = t;
+       return 0;
+}
+
+
+int
+str2u16(char *arg, uint16_t *val)
+{
+       char *err = NULL;
+       uint32_t t;
+
+       errno=0;
+       t = strtoul(arg, &err, 0);
+       if (errno || (err==arg) || ((err != NULL) && *err) || (t >= 0x10000)) {
+               return -1;
+       }
+
+       *val = t & 0xFFFF;
+       return 0;
+}
+
+int
+str2u8(char *arg, uint8_t *val)
+{
+       char *err = NULL;
+       uint32_t t;
+
+       errno=0;
+       t = strtoul(arg, &err, 0);
+       if (errno || (err==arg) || ((err != NULL) && *err) || (t >= 0x100)) {
+               return -1;
+       }
+
+       *val = t & 0xFF;
+       return 0;
+}
+
+int
+parse_arg(char *arg, char *buf, char *argv[])
+{
+       int res = 0;
+       size_t argl;
+       char *tok;
+       char **ap = &buf;
+       int i;
+
+       memset(argv, 0, MAX_ARG_COUNT * sizeof(void *));
+
+       if ((arg == NULL)) {
+               /* no arguments */
+               return 0;
+       }
+
+       argl = strlen(arg);
+       if (argl == 0) {
+               /* no arguments */
+               return 0;
+       }
+
+       if (argl >= MAX_ARG_LEN) {
+               /* argument is too long */
+               argl = MAX_ARG_LEN-1;
+       }
+
+       memcpy(buf, arg, argl);
+       buf[argl] = '\0';
+
+       for (i = 0; i < MAX_ARG_COUNT; i++) {
+               tok = strsep(ap, ":");
+               if (tok == NULL) {
+                       break;
+               }
+#if 0
+               else if (tok[0] == '\0') {
+                       break;
+               }
+#endif
+               argv[i] = tok;
+               res++;
+       }
+
+       return res;
+}
+
+
+int
+required_arg(char c, char *arg)
+{
+       if (arg == NULL || *arg != '-')
+               return 0;
+
+       ERR("option -%c requires an argument\n", c);
+       return ERR_FATAL;
+}
+
+
+int
+is_empty_arg(char *arg)
+{
+       int ret = 1;
+       if (arg != NULL) {
+               if (*arg) ret = 0;
+       };
+       return ret;
+}
+
+
+void
+csum8_update(uint8_t *p, uint32_t len, struct csum_state *css)
+{
+       for ( ; len > 0; len --) {
+               css->val += *p++;
+       }
+}
+
+
+uint16_t
+csum8_get(struct csum_state *css)
+{
+       uint8_t t;
+
+       t = css->val;
+       return ~t + 1;
+}
+
+
+void
+csum16_update(uint8_t *p, uint32_t len, struct csum_state *css)
+{
+       uint16_t t;
+
+       if (css->odd) {
+               t = css->tmp + (p[0]<<8);
+               css->val += LE16_TO_HOST(t);
+               css->odd = 0;
+               len--;
+               p++;
+       }
+
+       for ( ; len > 1; len -= 2, p +=2 ) {
+               t = p[0] + (p[1] << 8);
+               css->val += LE16_TO_HOST(t);
+       }
+
+       if (len == 1) {
+               css->tmp = p[0];
+               css->odd = 1;
+       }
+}
+
+
+uint16_t
+csum16_get(struct csum_state *css)
+{
+       char pad = 0;
+
+       csum16_update(&pad, 1, css);
+       return ~css->val + 1;
+}
+
+void
+csum32_update(uint8_t *p, uint32_t len, struct csum_state *css)
+{
+       uint32_t t;
+
+       for ( ; len > 3; len -= 4, p += 4 ) {
+               t = p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24);
+               css->val ^= t;
+       }
+}
+
+uint32_t
+csum32_get(struct csum_state *css)
+{
+       return css->val;
+}
+
+
+void
+csum_init(struct csum_state *css, int size)
+{
+       css->val = 0;
+       css->tmp = 0;
+       css->odd = 0;
+       css->size = size;
+}
+
+void
+csum_update(uint8_t *p, uint32_t len, struct csum_state *css)
+{
+       switch (css->size) {
+       case CSUM_TYPE_8:
+               csum8_update(p,len,css);
+               break;
+       case CSUM_TYPE_16:
+               csum16_update(p,len,css);
+               break;
+       case CSUM_TYPE_32:
+               csum32_update(p,len,css);
+               break;
+       }
+}
+
+
+uint32_t
+csum_get(struct csum_state *css)
+{
+       uint32_t ret;
+
+       switch (css->size) {
+       case CSUM_TYPE_8:
+               ret = csum8_get(css);
+               break;
+       case CSUM_TYPE_16:
+               ret = csum16_get(css);
+               break;
+       case CSUM_TYPE_32:
+               ret = csum32_get(css);
+       }
+
+       return ret;
+}
+
+
+/*
+ * routines to write data to the output file
+ */
+int
+write_out_data(FILE *outfile, uint8_t *data, size_t len,
+               struct csum_state *css)
+{
+       errno = 0;
+
+       fwrite(data, len, 1, outfile);
+       if (errno) {
+               ERRS("unable to write output file");
+               return ERR_FATAL;
+       }
+
+       if (css) {
+               csum_update(data, len, css);
+       }
+
+       return 0;
+}
+
+
+int
+write_out_padding(FILE *outfile, size_t len, uint8_t padc,
+                struct csum_state *css)
+{
+       uint8_t buf[512];
+       size_t buflen = sizeof(buf);
+       int err;
+
+       memset(buf, padc, buflen);
+       while (len > 0) {
+               if (len < buflen)
+                       buflen = len;
+
+               err = write_out_data(outfile, buf, buflen, css);
+               if (err)
+                       return err;
+
+               len -= buflen;
+       }
+
+       return 0;
+}
+
+
+int
+image_stat_file(struct image_desc *desc)
+{
+       struct stat st;
+       int err;
+
+       if (desc->file_name == NULL)
+               return 0;
+
+       err = stat(desc->file_name, &st);
+       if (err){
+               ERRS("stat failed on %s", desc->file_name);
+               return ERR_FATAL;
+       }
+
+       if (st.st_size > desc->out_size) {
+               WARN("file %s is too big, will be truncated to %d bytes\n",
+                       desc->file_name, desc->out_size);
+               desc->file_size = desc->out_size;
+               return ERR_INVALID_IMAGE;
+       }
+
+
+       desc->file_size = st.st_size;
+       desc->out_size = align(desc->file_size,1);
+       return 0;
+}
+
+
+int
+image_writeout_file(FILE *outfile, struct image_desc *desc,
+                       struct csum_state *css)
+{
+       char buf[FILE_BUF_LEN];
+       size_t buflen = sizeof(buf);
+       FILE *f;
+       size_t len;
+       int res;
+
+       if (desc->file_name == NULL)
+               return 0;
+
+       if (desc->file_size == 0)
+               return 0;
+
+       errno = 0;
+       f = fopen(desc->file_name,"r");
+       if (errno) {
+               ERRS("unable to open file: %s", desc->file_name);
+               return ERR_FATAL;
+       }
+
+       len = desc->file_size;
+       while (len > 0) {
+               if (len < buflen)
+                       buflen = len;
+
+               /* read data from source file */
+               errno = 0;
+               fread(buf, buflen, 1, f);
+               if (errno != 0) {
+                       ERRS("unable to read from file: %s", desc->file_name);
+                       res = ERR_FATAL;
+                       break;
+               }
+
+               res = write_out_data(outfile, buf, buflen, css);
+               if (res)
+                       break;
+
+               len -= buflen;
+       }
+
+       fclose(f);
+       return res;
+}
+
+
+int
+image_writeout(FILE *outfile, struct image_desc *desc)
+{
+       int res;
+       struct csum_state css;
+       size_t padlen;
+
+       res = 0;
+
+       if (!desc->file_size)
+               return 0;
+
+       DBG(2, "writing image, file=%s, file_size=%d\n",
+               desc->file_name, desc->file_size);
+
+       csum_init(&css, CSUM_TYPE_32);
+
+       res = image_writeout_file(outfile, desc, &css);
+       if (res)
+               return res;
+
+       /* write padding data if neccesary */
+       padlen = desc->out_size - desc->file_size;
+       DBG(1,"padding desc, length=%d", padlen);
+       res = write_out_padding(outfile, padlen, desc->padc, &css);
+
+       desc->csum = csum_get(&css);
+
+       return res;
+}
+
+
+int
+write_out_header(FILE *outfile)
+{
+       union file_hdr tmp;
+       int res;
+
+       errno = 0;
+       if (fseek(outfile, 0, SEEK_SET) != 0) {
+               ERRS("fseek failed on output file");
+               return ERR_FATAL;
+       }
+
+       switch (board->header_type) {
+       case HEADER_TYPE_CAS:
+               tmp.cas.type = HOST_TO_LE32(header.cas.type);
+               tmp.cas.id = HOST_TO_LE32(header.cas.id);
+               tmp.cas.kernel_offs = HOST_TO_LE32(sizeof(tmp.cas));
+               tmp.cas.kernel_size = HOST_TO_LE32(kernel_image.out_size);
+               tmp.cas.kernel_csum = HOST_TO_LE32(kernel_image.csum);
+               tmp.cas.magic1 = HOST_TO_LE32(CAS_MAGIC1);
+               tmp.cas.magic2 = HOST_TO_LE32(CAS_MAGIC2);
+               tmp.cas.magic3 = HOST_TO_LE32(CAS_MAGIC3);
+               res = write_out_data(outfile, (uint8_t *)&tmp.cas,
+                                       sizeof(tmp.cas), NULL);
+               break;
+       case HEADER_TYPE_NFS:
+               tmp.nfs.type = HOST_TO_LE32(header.nfs.type);
+               tmp.nfs.id = HOST_TO_LE32(header.nfs.id);
+               tmp.nfs.kernel_offs = HOST_TO_LE32(sizeof(tmp.nfs));
+               tmp.nfs.kernel_size = HOST_TO_LE32(kernel_image.out_size);
+               tmp.nfs.kernel_csum = HOST_TO_LE32(kernel_image.csum);
+               tmp.nfs.fs_offs = HOST_TO_LE32(sizeof(tmp.nfs)
+                                       + kernel_image.out_size);
+               tmp.nfs.fs_size = HOST_TO_LE32(fs_image.out_size);
+               tmp.nfs.fs_csum = HOST_TO_LE32(fs_image.csum);
+               res = write_out_data(outfile, (uint8_t *)&tmp.nfs,
+                                       sizeof(tmp.nfs), NULL);
+               break;
+       }
+
+       return res;
+}
+
+int
+write_out_images(FILE *outfile)
+{
+       struct image_desc *desc;
+       int i, res;
+
+       res = image_writeout(outfile, &kernel_image);
+       if (res)
+               return res;
+
+       res = image_writeout(outfile, &fs_image);
+       if (res)
+               return res;
+
+       return 0;
+}
+
+
+struct board_info *
+find_board(char *model)
+{
+       struct board_info *ret;
+       struct board_info *board;
+
+       ret = NULL;
+       for (board = boards; board->model != NULL; board++){
+               if (strcasecmp(model, board->model) == 0) {
+                       ret = board;
+                       break;
+               }
+       };
+
+       return ret;
+}
+
+
+int
+parse_opt_board(char ch, char *arg)
+{
+
+       DBG(1,"parsing board option: -%c %s", ch, arg);
+
+       if (board != NULL) {
+               ERR("only one board option allowed");
+               return ERR_FATAL;
+       }
+
+       if (required_arg(ch, arg))
+               return ERR_FATAL;
+
+       board = find_board(arg);
+       if (board == NULL){
+               ERR("invalid/unknown board specified: %s", arg);
+               return ERR_FATAL;
+       }
+
+       switch (board->header_type) {
+       case HEADER_TYPE_CAS:
+               header.cas.type = HEADER_TYPE_CAS;
+               header.cas.id = board->id;
+               break;
+       case HEADER_TYPE_NFS:
+               header.nfs.type = HEADER_TYPE_NFS;
+               header.nfs.id = board->id;
+               break;
+       default:
+               ERR("internal error, unknown header type\n");
+               return ERR_FATAL;
+       }
+
+       return 0;
+}
+
+
+int
+parse_opt_image(char ch, char *arg)
+{
+       char buf[MAX_ARG_LEN];
+       char *argv[MAX_ARG_COUNT];
+       int argc;
+       char *p;
+       struct image_desc *desc = NULL;
+       int i;
+
+       switch (ch) {
+       case 'K':
+               if (kernel_image.file_name) {
+                       WARN("only one kernel option allowed");
+                       break;
+               }
+               desc = &kernel_image;
+               break;
+       case 'F':
+               if (fs_image.file_name) {
+                       WARN("only one fs option allowed");
+                       break;
+               }
+               desc = &fs_image;
+               break;
+       }
+
+       if (!desc)
+               return ERR_FATAL;
+
+       argc = parse_arg(arg, buf, argv);
+
+       i = 0;
+       p = argv[i++];
+       if (!is_empty_arg(p)) {
+               desc->file_name = strdup(p);
+               if (desc->file_name == NULL) {
+                       ERR("not enough memory");
+                       return ERR_FATAL;
+               }
+       } else {
+               ERR("no file specified for option %c", ch);
+               return ERR_FATAL;
+       }
+
+       return 0;
+}
+
+
+int
+process_images(void)
+{
+       struct image_desc *desc;
+       uint32_t offs = 0;
+       int i;
+       int res;
+
+       kernel_image.out_size = board->max_kernel_size;
+       kernel_image.padc = DEFAULT_PADC;
+       res = image_stat_file(&kernel_image);
+       if (res)
+               return res;
+
+       if (!fs_image.file_name)
+               return 0;
+
+       fs_image.out_size = board->max_fs_size;
+       fs_image.padc = DEFAULT_PADC;
+       res = image_stat_file(&fs_image);
+       if (res)
+               return res;
+
+       return 0;
+}
+
+
+int
+main(int argc, char *argv[])
+{
+       int optinvalid = 0;   /* flag for invalid option */
+       int c;
+       int res = ERR_FATAL;
+
+       FILE *outfile;
+
+       progname=basename(argv[0]);
+
+       opterr = 0;  /* could not print standard getopt error messages */
+       while ( 1 ) {
+               optinvalid = 0;
+
+               c = getopt(argc, argv, "B:C:dhK:r:vw:x:");
+               if (c == -1)
+                       break;
+
+               switch (c) {
+               case 'B':
+                       optinvalid = parse_opt_board(c,optarg);
+                       break;
+               case 'd':
+                       invalid_causes_error = 0;
+                       break;
+               case 'C':
+               case 'K':
+                       optinvalid = parse_opt_image(c,optarg);
+                       break;
+               case 'k':
+                       keep_invalid_images = 1;
+                       break;
+               case 'v':
+                       verblevel++;
+                       break;
+               case 'h':
+                       usage(EXIT_SUCCESS);
+                       break;
+               default:
+                       optinvalid = 1;
+                       break;
+               }
+               if (optinvalid != 0 ){
+                       ERR("invalid option: -%c", optopt);
+                       goto out;
+               }
+       }
+
+       if (board == NULL) {
+               ERR("no board specified");
+               goto out;
+       }
+
+       if (optind == argc) {
+               ERR("no output file specified");
+               goto out;
+       }
+
+       ofname = argv[optind++];
+
+       if (optind < argc) {
+               ERR("invalid option: %s", argv[optind]);
+               goto out;
+       }
+
+       res = process_images();
+       if (res == ERR_FATAL)
+               goto out;
+
+       if (res == ERR_INVALID_IMAGE) {
+               if (invalid_causes_error)
+                       res = ERR_FATAL;
+
+               if (keep_invalid_images == 0) {
+                       WARN("generation of invalid images disabled", ofname);
+                       goto out;
+               }
+
+               WARN("generating invalid image", ofname);
+       }
+
+       outfile = fopen(ofname, "w");
+       if (outfile == NULL) {
+               ERRS("could not open \"%s\" for writing", ofname);
+               res = ERR_FATAL;
+               goto out;
+       }
+
+       if (write_out_header(outfile) != 0) {
+               res = ERR_FATAL;
+               goto out_flush;
+       }
+
+       if (write_out_images(outfile) != 0) {
+               res = ERR_FATAL;
+               goto out_flush;
+       }
+
+       if (write_out_header(outfile) != 0) {
+               res = ERR_FATAL;
+               goto out_flush;
+       }
+
+       DBG(1,"Image file %s completed.", ofname);
+
+out_flush:
+       fflush(outfile);
+       fclose(outfile);
+       if (res == ERR_FATAL) {
+               unlink(ofname);
+       }
+out:
+       if (res == ERR_FATAL)
+               return EXIT_FAILURE;
+
+       return EXIT_SUCCESS;
+}