1 files changed, 243 insertions, 0 deletions

diff --git a/utils/mkmpioboot/mkmpioboot.c b/utils/mkmpioboot/mkmpioboot.c
new file mode 100644
index 0000000000..ea619ed2f2
--- /dev/null
+++ b/utils/mkmpioboot/mkmpioboot.c
@@ -0,0 +1,243 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id:$
+ *
+ * Copyright (C) 2010 by Marcin Bukat
+ *
+ * code taken mostly from mkboot.c 
+ * Copyright (C) 2005 by Linus Nielsen Feltzing
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "mkmpioboot.h"
+
+#define OF_FIRMWARE_LEN 0x100000 /* size of the OF file */
+#define MPIO_STRING_OFFSET 0xfffe0 /* offset of the version string in OF */
+#define BOOTLOADER_MAX_SIZE 0x1f800 /* free space size */
+
+struct mpio_model {
+    /* Descriptive name of this model */
+    const char* model_name;
+    /* Model name used in the Rockbox header in ".mpio" files - these match the
+       -add parameter to the "scramble" tool */
+    const char* rb_model_name;
+    /* Model number used to initialise the checksum in the Rockbox header in
+       ".mpio" files - these are the same as MODEL_NUMBER in config-target.h */
+    const int rb_model_num;
+    /* Strings which indentifies OF version */
+    const char* of_model_string;
+};
+
+static const struct mpio_model mpio_models[] = {
+    [MODEL_HD200] =
+        { "MPIO HD200", "hd20", 69, "HD200  HDD Audio Ver113005" },
+    [MODEL_HD300] =
+        { "MPIO HD300", "hd30", 70, "HD300  HDD Audio Ver113006" },
+};
+
+
+/* MPIO HD200 and HD300 firmware is plain binary image
+ * 4 bytes of initial SP (loaded on reset)
+ * 4 bytes of initial PC (loaded on reset)
+ * binary image with entry point 0x00000008
+ *
+ * We put our bootloader code at 0x000e0000
+ * and patch reset vector to jump directly
+ * into our code on reset
+ */
+
+static unsigned char image[OF_FIRMWARE_LEN];
+
+static unsigned int get_uint32be(unsigned char* p)
+{
+    return ((p[0] << 24) | (p[1] << 16) | (p[2]<<8) | p[3]);
+}
+
+static long checksum(unsigned char* buf, int model, unsigned long length)
+{
+    unsigned long chksum = model;
+    unsigned long i;
+    
+    if(buf == NULL)
+        return -1;
+
+    for (i = 0; i < length; i++)
+    {
+        chksum += *buf++;
+    }
+
+return chksum;
+}
+
+int mkmpioboot(const char* infile, const char* bootfile, const char* outfile, int origin)
+{
+    FILE *f;
+    int i;
+    int len;
+    int model_index;
+    unsigned long file_checksum;
+    unsigned char header[8];
+
+    memset(image, 0xff, sizeof(image));
+
+    /* First, read the mpio original firmware into the image */
+    f = fopen(infile, "rb");
+    if(!f)
+    {
+        fprintf(stderr, "[ERR]  Can not open %s file for reading\n", infile);
+        return -1;
+    }
+
+    i = fread(image, 1, OF_FIRMWARE_LEN, f);
+    if(i < OF_FIRMWARE_LEN)
+    {
+        fprintf(stderr, "[ERR]  %s file read error\n", infile);        
+        fclose(f);
+        return -2;
+    }
+
+    fclose(f);
+
+    /* Now check if we have OF file loaded based on presence
+     * of the version string in firmware 
+     */
+
+    for(model_index = 0; model_index < NUM_MODELS; model_index++)
+        if (strcmp(mpio_models[model_index].of_model_string,
+            (char*)(image + MPIO_STRING_OFFSET)) == 0)
+            break;
+
+    if(model_index == NUM_MODELS)
+    {
+        fprintf(stderr, "[ERR]  Unknown MPIO original firmware version\n");
+        return -3;
+    }
+
+    fprintf(stderr, "[INFO] Loading original firmware file for %s\n",
+            mpio_models[model_index].model_name);
+
+    /* Now, read the boot loader into the image */
+    f = fopen(bootfile, "rb");
+    if(!f)
+    {
+        fprintf(stderr, "[ERR]  Can not open %s file for reading\n", bootfile);
+        return -4;
+    }
+
+    fprintf(stderr, "[INFO] Loading Rockbox bootloader file\n");
+
+    /* get bootloader size
+     * excluding header
+     */
+    fseek(f, 0, SEEK_END);
+    len = ftell(f) - 8;
+
+    if (len > BOOTLOADER_MAX_SIZE)
+    {
+        fprintf(stderr, "[ERR]  Bootloader doesn't fit in firmware file.\n");
+        fprintf(stderr, "[ERR]  This bootloader is %d bytes long\n", len);
+        fprintf(stderr, "[ERR]  and maximum allowed size is %d bytes\n",
+                BOOTLOADER_MAX_SIZE);
+        return -5;
+    }
+
+    /* Now check if the place we want to put
+     * our bootloader is free
+     */
+    for(i=0;i<len;i++)
+    {
+        if (image[origin+i] != 0)
+        {
+            fprintf(stderr, "[ERR]  Place for bootloader in OF file not empty\n");
+            return -6;
+        }
+    }
+
+    fseek(f, 0, SEEK_SET);
+
+    /* get bootloader header*/
+    fread(header,1,8,f);
+
+    if ( memcmp(header + 4, mpio_models[model_index].rb_model_name, 4) != 0 )
+    {
+        fprintf(stderr, "[ERR]  Original firmware and rockbox bootloader mismatch!\n");
+        fprintf(stderr, "[ERR]  Double check that you have bootloader for %s\n",
+                mpio_models[model_index].model_name);
+        return -7;
+    }
+
+    /* omit header */
+    fseek(f, 8, SEEK_SET);
+
+    i = fread(image + origin, 1, len, f);
+    if(i < len)
+    {
+        fprintf(stderr, "[ERR]  %s file read error\n", bootfile);
+        fclose(f);
+        return -8;
+    }
+
+    fclose(f);
+
+    /* calculate checksum and compare with data
+     * from header
+     */
+    file_checksum = checksum(image + origin, mpio_models[model_index].rb_model_num, len);
+
+    if ( file_checksum != get_uint32be(header) )
+    {
+        fprintf(stderr,"[ERR]  Bootloader checksum error\n");
+        return -9;
+    }
+
+    f = fopen(outfile, "wb");
+    if(!f)
+    {
+        fprintf(stderr, "[ERR]  Can not open %s file for writing\n" ,outfile);
+        return -10;
+    }
+
+    fprintf(stderr, "[INFO] Patching reset vector\n");
+
+    /* Patch the stack pointer address */    
+    image[0] = image[origin + 0];
+    image[1] = image[origin + 1];
+    image[2] = image[origin + 2];
+    image[3] = image[origin + 3];
+
+    /* Patch the reset vector to start the boot loader */
+    image[4] = image[origin + 4];
+    image[5] = image[origin + 5];
+    image[6] = image[origin + 6];
+    image[7] = image[origin + 7];
+
+    i = fwrite(image, 1, OF_FIRMWARE_LEN, f);
+    if(i < OF_FIRMWARE_LEN)
+    {
+        fprintf(stderr,"[ERR]  %s file write error\n", outfile);
+        fclose(f);
+        return -11;
+    }
+
+    fprintf(stderr,"[INFO] Wrote 0x%x bytes in %s\n", OF_FIRMWARE_LEN, outfile);
+    fprintf(stderr,"[INFO] Patching succeeded!\n");
+   
+    fclose(f);
+    
+    return 0;
+}