Move init_reader() from utils.py to transport/__init__.py

This avoids a circular dependency when introducing type annotations.

Change-Id: I168597ac14497fb188a15cb632f32452128bc1c6

1 files changed, 29 insertions, 0 deletions

diff --git a/pySim/transport/__init__.py b/pySim/transport/__init__.py
index f946af8..24d7521 100644
--- a/pySim/transport/__init__.py
+++ b/pySim/transport/__init__.py
@@ -3,6 +3,8 @@
 """ pySim: PCSC reader transport link base
 """
 
+from typing import Optional
+
 from pySim.exceptions import *
 from pySim.utils import sw_match
 
@@ -103,3 +105,30 @@ class LinkBase(object):
 		if not sw_match(rv[1], sw):
 			raise SwMatchError(rv[1], sw.lower())
 		return rv
+
+def init_reader(opts) -> Optional[LinkBase]:
+	"""
+	Init card reader driver
+	"""
+	sl = None # type : :Optional[LinkBase]
+	try:
+		if opts.pcsc_dev is not None:
+			print("Using PC/SC reader interface")
+			from pySim.transport.pcsc import PcscSimLink
+			sl = PcscSimLink(opts.pcsc_dev)
+		elif opts.osmocon_sock is not None:
+			print("Using Calypso-based (OsmocomBB) reader interface")
+			from pySim.transport.calypso import CalypsoSimLink
+			sl = CalypsoSimLink(sock_path=opts.osmocon_sock)
+		elif opts.modem_dev is not None:
+			print("Using modem for Generic SIM Access (3GPP TS 27.007)")
+			from pySim.transport.modem_atcmd import ModemATCommandLink
+			sl = ModemATCommandLink(device=opts.modem_dev, baudrate=opts.modem_baud)
+		else: # Serial reader is default
+			print("Using serial reader interface")
+			from pySim.transport.serial import SerialSimLink
+			sl = SerialSimLink(device=opts.device, baudrate=opts.baudrate)
+		return sl
+	except Exception as e:
+		print("Card reader initialization failed with exception:\n" + str(e))
+		return None