transport: move argument parser setup into concrete classes

The argument parser is set up globally for all LinkBase objects in
__init__.py. Since we tend to have only platform independed code in
__init__.py, we should move the argument parser setup into the
specific LinkBase classes.

Related: OS#6210
Change-Id: I22c32aa81ca0588e3314c3ff4546f6e5092c11df

pySim/transport/modem_atcmd.py

@@ -20,6 +20,7 @@ import logging as log
 import serial
 import time
 import re
+import argparse
 from typing import Optional
 
 from pySim.utils import Hexstr, ResTuple
@@ -173,3 +174,11 @@ class ModemATCommandLink(LinkBase):
 
     def __str__(self) -> str:
         return "modem:%s" % self._device
+
+    @staticmethod
+    def argparse_add_reader_args(arg_parser: argparse.ArgumentParser):
+        modem_group = arg_parser.add_argument_group('AT Command Modem Reader')
+        modem_group.add_argument('--modem-device', dest='modem_dev', metavar='DEV', default=None,
+                                 help='Serial port of modem for Generic SIM Access (3GPP TS 27.007)')
+        modem_group.add_argument('--modem-baud', type=int, metavar='BAUD', default=115200,
+                                 help='Baud rate used for modem port')