From 7971cb0aa3e517a53f0ce6d3ee9bc3179041ccb8 Mon Sep 17 00:00:00 2001
From: John Klug <john.klug@multitech.com>
Date: Wed, 25 May 2022 17:12:18 -0500
Subject: mLinux 6

---
 scripts/lib/wic/utils/syslinux.py | 58 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 scripts/lib/wic/utils/syslinux.py

(limited to 'scripts/lib/wic/utils/syslinux.py')

diff --git a/scripts/lib/wic/utils/syslinux.py b/scripts/lib/wic/utils/syslinux.py
new file mode 100644
index 0000000..aace286
--- /dev/null
+++ b/scripts/lib/wic/utils/syslinux.py
@@ -0,0 +1,58 @@
+# ex:ts=4:sw=4:sts=4:et
+# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; version 2 of the License
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc., 59
+# Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# AUTHOR
+# Adrian Freihofer <adrian.freihofer (at] neratec.com>
+
+
+import re
+from wic import msger
+
+
+def serial_console_form_kargs(kernel_args):
+    """
+    Create SERIAL... line from kernel parameters
+
+    syslinux needs a line SERIAL port [baudrate [flowcontrol]]
+    in the syslinux.cfg file. The config line is generated based
+    on kernel boot parameters. The the parameters of the first
+    ttyS console are considered for syslinux config.
+    @param kernel_args kernel command line
+    @return line for syslinux config file e.g. "SERIAL 0 115200"
+    """
+    syslinux_conf = ""
+    for param in kernel_args.split():
+        param_match = re.match("console=ttyS([0-9]+),?([0-9]*)([noe]?)([0-9]?)(r?)", param)
+        if param_match:
+            syslinux_conf += "SERIAL " + param_match.group(1)
+            # baudrate
+            if param_match.group(2):
+                syslinux_conf += " " + param_match.group(2)
+            # parity
+            if param_match.group(3) and param_match.group(3) != 'n':
+                msger.warning("syslinux does not support parity for console. {} is ignored."
+                              .format(param_match.group(3)))
+            # number of bits
+            if param_match.group(4) and param_match.group(4) != '8':
+                msger.warning("syslinux supports 8 bit console configuration only. {} is ignored."
+                              .format(param_match.group(4)))
+            # flow control
+            if param_match.group(5) and param_match.group(5) != '':
+                msger.warning("syslinux console flowcontrol configuration. {} is ignored."
+                              .format(param_match.group(5)))
+            break
+
+    return syslinux_conf
-- 
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