28d32244e1
Sercomm uses uppercase for hexadecimal representation of the device hardware IDs in factory image PID. This commit brings the sercomm-pid.py script into compliance with the original Sercomm algorithm. Example ------- +--------+-------------+-----------+-------------+ | Device | PID (before | PID | PID (after | | HWID | the commit) | (Sercomm) | the commit) | +--------+-------------+-----------+-------------+ | CPJ | 43 50 4a | 43 50 4A | 43 50 4A | +--------+-------------+-----------+-------------+ Signed-off-by: Mikhail Zhilkin <csharper2005@gmail.com>
109 lines
2.2 KiB
Python
Executable File
109 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python3
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"""
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# SPDX-License-Identifier: GPL-2.0-or-later
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#
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# sercomm-pid.py: Creates Sercomm device PID
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#
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# Copyright © 2022 Mikhail Zhilkin
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"""
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import argparse
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import binascii
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import struct
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PID_SIZE = 0x70
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PADDING = 0x30
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PADDING_TAIL = 0x0
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def auto_int(x):
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return int(x, 0)
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def create_pid_file(args):
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pid_file = open(args.pid_file, "wb")
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buf = get_pid(args)
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pid_file.write(buf)
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pid_file.close()
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def get_pid(args):
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buf = bytearray([PADDING] * PID_SIZE)
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if not args.hw_id:
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enc = args.hw_version.rjust(14, '0').encode('ascii')
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struct.pack_into('>14s', buf, 0x0, enc)
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else:
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enc = args.hw_version.rjust(8, '0').encode('ascii')
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struct.pack_into('>8s', buf, 0x0, enc)
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enc = binascii.hexlify(args.hw_id.encode()).upper()
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struct.pack_into('>6s', buf, 0x8, enc)
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enc = args.sw_version.rjust(4, '0').encode('ascii')
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struct.pack_into('>4s', buf, 0x64, enc)
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if (args.extra_padd_size):
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tail = bytearray([PADDING_TAIL] * args.extra_padd_size)
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if (args.extra_padd_byte):
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struct.pack_into ('<i', tail, 0x0,
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args.extra_padd_byte)
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elif not args.hw_id:
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tail[0] = 0x0D
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tail[1] = 0x0A
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buf += tail
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return buf
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def main():
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global args
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parser = argparse.ArgumentParser(description='This script \
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generates firmware PID for the Sercomm-based devices')
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parser.add_argument('--hw-version',
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dest='hw_version',
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action='store',
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type=str,
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help='Sercomm hardware version')
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parser.add_argument('--hw-id',
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dest='hw_id',
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action='store',
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type=str,
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help='Sercomm hardware ID')
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parser.add_argument('--sw-version',
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dest='sw_version',
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action='store',
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type=str,
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help='Sercomm software version')
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parser.add_argument('--pid-file',
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dest='pid_file',
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action='store',
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type=str,
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help='Output PID file')
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parser.add_argument('--extra-padding-size',
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dest='extra_padd_size',
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action='store',
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type=auto_int,
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help='Size of extra NULL padding at the end of the file \
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(optional)')
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parser.add_argument('--extra-padding-first-byte',
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dest='extra_padd_byte',
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action='store',
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type=auto_int,
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help='First byte of extra padding (optional)')
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args = parser.parse_args()
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if ((not args.hw_version) or
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(not args.sw_version) or
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(not args.pid_file)):
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parser.print_help()
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exit()
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create_pid_file(args)
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main()
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