| Patrick Williams | c124f4f | 2015-09-15 14:41:29 -0500 | [diff] [blame] | 1 | # ex:ts=4:sw=4:sts=4:et |
| 2 | # -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- |
| 3 | # |
| 4 | # This program is free software; you can redistribute it and/or modify it |
| 5 | # under the terms of the GNU General Public License as published by the Free |
| 6 | # Software Foundation; version 2 of the License |
| 7 | # |
| 8 | # This program is distributed in the hope that it will be useful, but |
| 9 | # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 10 | # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 11 | # for more details. |
| 12 | # |
| 13 | # You should have received a copy of the GNU General Public License along |
| 14 | # with this program; if not, write to the Free Software Foundation, Inc., 59 |
| 15 | # Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 16 | # |
| 17 | # AUTHOR |
| 18 | # Adrian Freihofer <adrian.freihofer (at] neratec.com> |
| 19 | |
| 20 | |
| 21 | import re |
| 22 | from wic import msger |
| 23 | |
| 24 | |
| 25 | def serial_console_form_kargs(kernel_args): |
| 26 | """ |
| 27 | Create SERIAL... line from kernel parameters |
| 28 | |
| 29 | syslinux needs a line SERIAL port [baudrate [flowcontrol]] |
| 30 | in the syslinux.cfg file. The config line is generated based |
| 31 | on kernel boot parameters. The the parameters of the first |
| 32 | ttyS console are considered for syslinux config. |
| 33 | @param kernel_args kernel command line |
| 34 | @return line for syslinux config file e.g. "SERIAL 0 115200" |
| 35 | """ |
| 36 | syslinux_conf = "" |
| 37 | for param in kernel_args.split(): |
| 38 | param_match = re.match("console=ttyS([0-9]+),?([0-9]*)([noe]?)([0-9]?)(r?)", param) |
| 39 | if param_match: |
| 40 | syslinux_conf += "SERIAL " + param_match.group(1) |
| 41 | # baudrate |
| 42 | if param_match.group(2): |
| 43 | syslinux_conf += " " + param_match.group(2) |
| 44 | # parity |
| 45 | if param_match.group(3) and param_match.group(3) != 'n': |
| 46 | msger.warning("syslinux does not support parity for console. {} is ignored." |
| 47 | .format(param_match.group(3))) |
| 48 | # number of bits |
| 49 | if param_match.group(4) and param_match.group(4) != '8': |
| 50 | msger.warning("syslinux supports 8 bit console configuration only. {} is ignored." |
| 51 | .format(param_match.group(4))) |
| 52 | # flow control |
| 53 | if param_match.group(5) and param_match.group(5) != '': |
| 54 | msger.warning("syslinux console flowcontrol configuration. {} is ignored." |
| 55 | .format(param_match.group(5))) |
| 56 | break |
| 57 | |
| 58 | return syslinux_conf |