1 files changed, 115 insertions, 0 deletions

diff --git a/firmware/common/rb-loader.c b/firmware/common/rb-loader.c
new file mode 100644
index 0000000000..10807f9c96
--- /dev/null
+++ b/firmware/common/rb-loader.c
@@ -0,0 +1,115 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * 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 1
+ * 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 "config.h"
+#include "system.h"
+#include "file.h"
+#include "rb-loader.h"
+#include "loader_strerror.h"
+
+/* Load firmware image in a format created by add method of tools/scramble
+ * on success we return size loaded image
+ * on error we return negative value which can be deciphered by means
+ * of strerror() function
+ */
+int load_firmware(unsigned char* buf, const char* firmware, int buffer_size)
+{
+    char filename[MAX_PATH];
+    int fd;
+    int rc;
+    int len;
+    int ret = 0;
+    unsigned long chksum;
+    unsigned long sum;
+    int i;
+
+    /* only filename passed */
+    if (firmware[0] != '/')
+    {
+        /* First check in BOOTDIR */
+        snprintf(filename, sizeof(filename), BOOTDIR "/%s",firmware);
+
+        fd = open(filename, O_RDONLY);
+        if(fd < 0)
+        {
+            /* Check in root dir */
+            snprintf(filename, sizeof(filename),"/%s",firmware);
+            fd = open(filename, O_RDONLY);
+
+            if (fd < 0)
+                return EFILE_NOT_FOUND;
+        }
+    }
+    else
+    {
+        /* full path passed */
+        fd = open(firmware, O_RDONLY);
+        if (fd < 0)
+            return EFILE_NOT_FOUND;
+    }
+
+    len = filesize(fd) - 8;
+
+    if (len > buffer_size)
+    {
+        ret = EFILE_TOO_BIG;
+        goto end;
+    }
+
+    lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
+
+    rc = read(fd, &chksum, 4);
+    chksum = betoh32(chksum); /* Rockbox checksums are big-endian */
+    if(rc < 4)
+    {
+        ret = EREAD_CHKSUM_FAILED;
+        goto end;
+    }
+
+    lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
+
+    rc = read(fd, buf, len);
+    if(rc < len)
+    {
+        ret = EREAD_IMAGE_FAILED;
+        goto end;
+    }
+
+    sum = MODEL_NUMBER;
+
+    for(i = 0;i < len;i++)
+    {
+        sum += buf[i];
+    }
+
+    if(sum != chksum)
+    {
+        ret = EBAD_CHKSUM;
+        goto end;
+    }
+
+    ret = len;
+
+end:
+    close(fd);
+    return ret;
+}
+