1 files changed, 124 insertions, 0 deletions
diff --git a/util/rockchip/make_idb.py b/util/rockchip/make_idb.py
new file mode 100755
index 0000000000..e95f5c2fd7
--- /dev/null
+++ b/util/rockchip/make_idb.py
@@ -0,0 +1,124 @@
+#!/usr/bin/env python
+# Copyright (c) 2014 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import struct
+import sys
+from io import SEEK_SET, SEEK_END
+
+class IDBTool:
+  def __init__(self):
+    print "Initialize IDBTool"
+
+  def p_rc4(self, buf, length):
+    key = (124,78,3,4,85,5,9,7,45,44,123,56,23,13,23,17)
+    K = key * 16
+    S = [i for i in range(256)]
+
+    j = 0
+    for i in range(256):
+      j = (j + S[i] + K[i]) % 256
+      temp = S[i]; S[i] = S[j]; S[j] = temp;
+
+    i = j = k = 0
+    for x in range(length):
+      i = (i+1) % 256
+      j = (j + S[i]) % 256
+      temp = S[i]; S[i] = S[j]; S[j] = temp
+      k = (S[i] + S[j]) % 256
+      buf[x] = struct.pack('B', ord(buf[x]) ^ S[k])
+
+  def makeIDB(self, from_file, to_file, rc4_flag = False, align_flag = False):
+    try:
+      fin = open(from_file, 'rb')
+    except:
+      sys.exit("Failed to open file : " + from_file)
+
+    try:
+      fin.seek(0, SEEK_END)
+      if (fin.tell() > 4 * 1024 * 1024):
+        sys.exit("Input file is more than 4MB")
+      fin.seek(0)
+      data = fin.read()
+    finally:
+      fin.close()
+
+    data_len = len(data)
+    SECTOR_SIZE = 512
+    PAGE_ALIGN  = 4
+    sectors = (data_len + 4 - 1) / SECTOR_SIZE + 1
+    pages = (sectors - 1) / PAGE_ALIGN + 1
+    sectors = pages * PAGE_ALIGN;
+
+    buf = [B'\0'] * sectors * SECTOR_SIZE
+    buf[:4] = "RK32"
+    buf[4 : 4+data_len] = data
+
+    idblock = [B'\0'] * 4 * SECTOR_SIZE
+    blank   = [B'\0'] * 4 * SECTOR_SIZE
+    idblock[:4] = ['\x55', '\xAA', '\xF0', '\x0F']
+
+    if (not rc4_flag):
+      idblock[8:12] = struct.pack("<I", 1)
+    else:
+      for i in range(sectors):
+        list_tmp = buf[SECTOR_SIZE*i : SECTOR_SIZE*(i+1)]
+        self.p_rc4(list_tmp, SECTOR_SIZE)
+        buf[SECTOR_SIZE*i : SECTOR_SIZE*(i+1)] = list_tmp
+
+    idblock[12:16] = struct.pack("<HH", 4, 4);
+    idblock[506:510] = struct.pack("<HH", sectors, sectors);
+    self.p_rc4(idblock, SECTOR_SIZE)
+
+    try:
+      fout = open(to_file, "wb+")
+    except:
+      sys.exit("Failed to open output file : " + to_file)
+
+    try:
+      if (align_flag):
+        fout.write(''.join(idblock))
+        fout.write(''.join(blank))
+
+        for s in xrange(0, sectors * SECTOR_SIZE, PAGE_ALIGN * SECTOR_SIZE):
+          fout.write(''.join(buf[s : s + PAGE_ALIGN * SECTOR_SIZE]))
+          fout.write(''.join(blank))
+      else:
+        fout.write(''.join(idblock))
+        fout.write(''.join(buf))
+      fout.flush()
+    except:
+      sys.exit("Failed to write data to : " + to_file)
+    finally:
+      fout.close()
+    print "DONE"
+
+def usage():
+  print "Usage: make_idb.py [--enable-rc4] [--enable-align] [--to=out] --from=in"
+
+if __name__ == '__main__':
+  rc4_flag = align_flag = False
+  to_file = "IDBlock.bin"
+
+  for para in sys.argv[1:]:
+    if (para == "--enable-rc4"):
+      rc4_flag = True
+    elif (para == "--enable-align"):
+      align_flag = True
+    elif (para.startswith("--to=")):
+      to_file = para.split('=')[1]
+    elif (para.startswith("--from=")):
+      from_file = para.split('=')[1]
+    elif (para == "--help" or para == "-h"):
+      usage()
+      sys.exit()
+    else:
+      usage()
+      sys.exit()
+  if ('from_file' not in vars() or to_file == ''):
+    usage()
+    sys.exit()
+
+  idbtool = IDBTool()
+  idbtool.makeIDB(from_file, to_file, rc4_flag, align_flag)