From c87a500c45f36ad248b1298d63e590d1d7e74f12 Mon Sep 17 00:00:00 2001
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: Tue, 3 Jul 2018 11:06:47 +0800
Subject: [PATCH] rcw: support byte swapping without tclsh tool

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
---
 Makefile     |    4 ----
 byte_swap.py |   32 ++++++++++++++++++++++++++++++++
 qspi_swap.sh |    2 +-
 3 files changed, 33 insertions(+), 5 deletions(-)
 create mode 100755 byte_swap.py

diff --git a/Makefile b/Makefile
index 9f0587e..393bb2c 100644
--- a/Makefile
+++ b/Makefile
@@ -13,10 +13,6 @@ TCLSH := $(shell command -v tclsh 2> /dev/null)
 VER = $(shell git describe --tags)
 
 all install clean:
-ifndef TCLSH
-	$(error "tclsh is not available. please  install it.")
-	exit 1
-endif
 	@for board in $(BOARDS); do \
 		$(MAKE) -C $$board $@ DESTDIR=$(DESTDIR)/$$board; \
 	done
diff --git a/byte_swap.py b/byte_swap.py
new file mode 100755
index 0000000..386310e
--- /dev/null
+++ b/byte_swap.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+"""
+Swap the 4/8 bytes endian except for PBI CRC
+2016-10-9: Initial version
+
+Usage:
+	./byte_swap.py <file_name> <byte>
+"""
+import sys
+
+try:
+    file_name = sys.argv[1]
+    byte = int(sys.argv[2])
+except:
+    print("Usage: ./byte_swap.py <file_name> <byte>")
+    print("E.g.: ./byte_swap.py rcw_1600.bin 8\n")
+    exit
+
+with open(file_name,'rb') as file:
+    tmp = file.read()
+file.close()
+
+with open(file_name + '.swapped','wb') as file:
+    for i in range(0, len(tmp) - 1, byte):
+	if(tmp[i:i+4].encode('hex')) == "08610040":
+	    #print("PBI CRC command")
+	    file.write(tmp[i:i+8])
+	    break
+	file.write(tmp[i:i+byte][::-1])
+file.close()
+
+print("Swapped file: " + file_name + '.swapped')
diff --git a/qspi_swap.sh b/qspi_swap.sh
index 0b58e44..d23fd8b 100755
--- a/qspi_swap.sh
+++ b/qspi_swap.sh
@@ -9,7 +9,7 @@ do
 	if [ "$board_name" = "$current_dir" ]; then
 		if [ -e $filename ]; then
 			swapped_file="$filename.swapped"
-			tclsh ../tools/byte_swap.tcl $filename $swapped_file 8
+			../byte_swap.py $filename 8
 		fi
 	fi
 done < $1
-- 
1.7.1

