From 37e09437c2f20ac269f8d2b7f9c7f7cd325f0585 Mon Sep 17 00:00:00 2001
From: makefu <github@syntax-fehler.de>
Date: Sat, 20 Aug 2011 23:21:48 +0200
Subject: oncology: initial commit

oncology will analyse the current krebs status
---
 oncology/dpfhack_display/hackit.py | 150 +++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 oncology/dpfhack_display/hackit.py

(limited to 'oncology/dpfhack_display/hackit.py')

diff --git a/oncology/dpfhack_display/hackit.py b/oncology/dpfhack_display/hackit.py
new file mode 100644
index 00000000..1ad64f1b
--- /dev/null
+++ b/oncology/dpfhack_display/hackit.py
@@ -0,0 +1,150 @@
+import struct
+import sys
+sys.path.append("./Debug")
+import dpf
+import time
+import binascii
+
+# DPF profiles
+import profiles
+
+# If you are an expert, set this to 0 to avoid the warnings
+paranoia_mode = 1
+
+JUMPTABLE_OFFSET = 0x80
+HEXDIR = "hexfiles/"
+
+instructions = [
+	"""Press and hold MENU while USB is plugged in.
+If successful, you will get the 'USB connect' message and the device
+will appear as non-USB storage device"""
+]
+
+ins_common = """To put the device back into (almost) original state working
+as USB storage, press the RESET button."""
+
+############################################################################
+
+bswap = lambda x: ( (x >> 8) & 0xff ) | ((x << 8) & 0xff00)
+
+def dump_flash(d, fname, offset, size):
+	data = d.readFlash(offset, size)
+	f = open(fname, "wb")
+	f.write(data)
+	f.close()
+
+def find_dpf(version):
+	for i in profiles.KNOWN_DPFS:
+		v = i[0]
+		if v[0] == str(version[0]) and v[1] == str(version[1]) and v[2] == str(version[2]):
+			print "Found matching version info"
+			return i
+	return None
+
+def get_module(buf, n):
+	n *= 8
+	start, end, flashaddr = struct.unpack("<HHI", buf[n:n+8])
+
+	start = bswap(start)
+	end = bswap(end)
+
+	return start, end, flashaddr
+
+def patch_module(d, record, buf):
+	n = record[0]
+	if n == profiles.NEW: # We don't patch an existing module, find infos in magic field:
+		start, flashaddr = record[1]
+		d.patchSector(start, flashaddr, HEXDIR + record[2])
+
+	elif n == profiles.COPY: # We make a copy of a full sector
+		src, dest = record[1]
+		print "Copying sector from 0x%06x to 0x%06x..." %(src, dest)
+		data = d.readFlash(src, 0x10000)
+		d.eraseFlash(dest)
+		d.writeFlash(dest, data)
+	else:
+		print "Analyzing module %d..." % n
+		start, end, flashaddr = get_module(buf, n)
+		l = end - start
+		start += 0x800
+		checksum = record[1]
+		data = d.readFlash(flashaddr, l)
+		c = binascii.crc32(data) & 0xffffffff
+		if c == record[2]:
+			print "Module already patched"
+			return True
+		elif c != checksum:
+			print "CRC32 does not match: 0x%08lx" % c
+			return False
+		else:
+			print "patching..."
+
+		d.patchSector(start, flashaddr, HEXDIR + record[3])
+
+	return True
+
+def recognize(d):
+	print "Reading flash..."
+	buf = d.readFlash(0x0, 0x280)
+
+	print "done"
+	b = buf[:7]
+	xmem, code, dummy, offset = struct.unpack(">HHBH", b)
+	version = (buf[0x50:0x58], buf[0x60: 0x70], buf[0x80:0x88])
+
+	dpf = find_dpf(version)
+	if not dpf:
+		print "No DPF found. Create a record or look for one"
+		print version
+	else:
+		print "Identifier:", dpf[1]
+		di = dpf[3]
+		di['offset'] = offset
+
+	return dpf
+
+def patch(d, dpf):
+	if (paranoia_mode):
+		print """Now patching. There is no 100% guarantee that your device will
+	work after doing this. You must never unplug the device from USB while
+	it is being updated.
+	Are you sure you take all risks and that you want to continue?"""
+		a = raw_input("Type 'yes' to continue > ")
+		if a != "yes":
+			print "Aborting."
+			return False
+
+	p = dpf[4]
+
+	buf = d.readFlash(JUMPTABLE_OFFSET, dpf[3]['offset'])
+	for i in p[2]:
+		if not patch_module(d, i, buf):
+			return False
+	
+	return True
+#
+#
+# MAIN
+
+if len(sys.argv) != 2:
+	print "Usage: %s [<generic scsi device> | usb0]" % sys.argv[0]
+	print "You may have to run this as root when accessing generic scsi devices"
+	sys.exit(-1)
+
+d = dpf.open(sys.argv[1])
+
+dpf = recognize(d)
+if dpf:
+	r = dpf[4]
+	ret = patch(d, dpf)
+	if ret:
+		print
+		print "Now disconnect the DPF from USB."
+		print "To activate the 'developer mode':"
+		print
+		print instructions[r[0]]
+		print
+		print ins_common
+	else:
+		print "DPF might not be completely patched."
+d.close()
-- 
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