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#!/usr/bin/perl -w
# $Id: config_wrapper 534 2013-09-22 21:37:24Z mueller $
#
# Copyright 2010-2013 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
#
# This program is free software; you may redistribute and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 2, or at your option any later version.
#
# 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 complete details.
#
#  Revision History:
# Date         Rev Version  Comment
# 2013-09-21   534   1.1.8  add nexys4 support
# 2013-01-02   467   1.1.7  jconfig: prepend '0x' to support 'jtag #2007'
# 2012-02-11   457   1.1.6  jconfig: use RETRO_FX2_VID/PID for USB VID/PID
# 2011-12-03   435   1.1.5  add nexys3 support;
# 2011-08-04   402   1.1.4  add atlys support;
# 2011-07-25   399   1.1.3  add nexys2-500 support; bsdl path for sp605
# 2011-07-18   395   1.1.2  cleanup bsdl path creation for jtag
# 2011-07-17   394   1.1.1  add bit->svf conversion and config with jtag
# 2011-07-11   393   1.1    renamed from impact_wrapper; add function parameter,
#                           old action with 'iconfig'
# 2011-07-01   386   1.0.3  support sp605/xc6slx45t
# 2010-05-24   294   1.0.2  support nexys2/xc3s1200e
# 2010-04-24   282   1.0.1  proper error exit for GetOptions()
# 2010-04-24   281   1.0    Initial version
#

use 5.005;                                  # require Perl 5.005 or higher
use strict;                                 # require strict checking
use FileHandle;

use Getopt::Long;

my %opts = ();

GetOptions(\%opts, "help", "dry_run", "board=s", "path=s") or exit 1;

# setup defaults for board and path
if (not defined $opts{board}) {
  $opts{board} = "s3board";
}
if (not defined $opts{path}) {
  $opts{path}  = "xc3s1000"  if $opts{board} eq "s3board";
  $opts{path}  = "xc3s1200e" if $opts{board} eq "nexys2";
  $opts{path}  = "xc6slx16"  if $opts{board} eq "nexys3";
  $opts{path}  = "xc7a100t"  if $opts{board} eq "nexys4";
  $opts{path}  = "xc6slx45"  if $opts{board} eq "atlys";
  $opts{path}  = "xc6slx45t" if $opts{board} eq "sp605";
}

sub print_help;
sub run_command;


autoflush STDOUT 1 if (-p STDOUT);          # autoflush if output into pipe

if (exists $opts{help}) {
  print_help;
  exit 0;
}

my $board = $opts{board};
my $ipath = $opts{path};

$ipath =~ s/-.*$//;                         # trim all after first '-'

# now setup JTAG chain config

my @plist;
my $pfpga;

#
# Note: when new targets are added update also the blist logic below
#
if ($board eq "s3board" && $ipath eq "xc3s200") {           # S3BOARD-200
  @plist = ($ipath, "xcf02s");
  $pfpga = 1;
} elsif ($board eq "s3board" && $ipath eq "xc3s1000") {     # S3BOARD-1200
  @plist = ($ipath, "xcf04s");
  $pfpga = 1;

} elsif ($board eq "nexys2" && $ipath eq "xc3s1200e") {     # nexys2-1200
  @plist = ($ipath, "xcf04s");
  $pfpga = 1;
} elsif ($board eq "nexys2" && $ipath eq "xc3s500e") {      # nexys2-500
  @plist = ($ipath, "xcf04s");
  $pfpga = 1;

} elsif ($board eq "nexys3" && $ipath eq "xc6slx16") {      # nexys3
  @plist = ($ipath);
  $pfpga = 1;

} elsif ($board eq "nexys4" && $ipath eq "xc7a100t") {      # nexys4
  @plist = ($ipath);
  $pfpga = 1;

} elsif ($board eq "atlys" && $ipath eq "xc6slx45") {       # atlys
  @plist = ($ipath);
  $pfpga = 1;

} elsif ($board eq "sp605" && $ipath eq "xc6slx45t") {      # sp605
  @plist = ("xccace", $ipath);
  $pfpga = 2;
} else {
  print STDERR 
    "config_wrapper-E: only s3board/nexys2,3/atlys/sp605 supported\n";
  exit 1;
}

my @blist;
foreach my $part (@plist) {
  if    ($part =~ m/^xcf/)       { push @blist, "xcf/data" }        # proms
  elsif ($part =~ m/^xc3s\d*$/)  { push @blist, "spartan3/data" }   # s-3
  elsif ($part =~ m/^xc3s\d*e$/) { push @blist, "spartan3e/data" }  # s-3e
  elsif ($part =~ m/^xc6slx\d*t?$/) { push @blist, "spartan6/data" }# s-6 lx
  elsif ($part =~ m/^xc7a\d*t?$/) { push @blist, "artix7/data" }    # 7-a
  elsif ($part =~ m/^xccace$/)   { push @blist, "acempm/data" }     # sys-ace
  else {
    print STDERR "config_wrapper-E: no bsdl path known for $part\n";
    exit 1;
  }
}

my $cmd  = shift @ARGV;
my $file = shift @ARGV;

if (! defined $cmd) {
  print STDERR "config_wrapper-E: no command specified\n";
  exit 1;
}

if (! defined $file) {
  print STDERR "config_wrapper-E: no bit or svf file specified\n";
  exit 1;
}
if (! -r $file) {
  print STDERR "config_wrapper-E: input file not found or readable\n";
  exit 1;
}

my $xilpath = $ENV{XILINX};
if (! defined $xilpath) {
  print STDERR "config_wrapper-E: XILINX environment variable not defined\n";
  exit 1;
}

# ----- iconfig action --------------------------------------------------------
if ($cmd eq "iconfig") {

  my $tmpfile = "tmp_config_wrapper.cmd";
  open (OFILE, ">$tmpfile") or die "Couldn't open tmp cmd file: $!";

  print  OFILE "setMode -bs\n";
  print  OFILE "setCable -p auto\n";
  for (my $i = 0; $i<=$#plist; $i++) {
    printf OFILE "addDevice -p %d -part %s\n", $i+1, $plist[$i];
  }
  printf OFILE "assignFile -p %d -file %s\n", $pfpga, $file;
  printf OFILE "program -p %d -verify\n", $pfpga;
  print  OFILE "quit\n";

  close (OFILE) or die "Couldn't close tmp cmd file: $!";

  my $rc  = run_command("impact -batch", $tmpfile);
  exit $rc;

# ----- jconfig action --------------------------------------------------------
} elsif ($cmd eq "jconfig") {

  my $bpath = join ";", map "$xilpath/$_",@blist;

  my $tmpfile = "tmp_config_wrapper.cmd";
  open (OFILE, ">$tmpfile") or die "Couldn't open tmp cmd file: $!";

  # the UrJtag and Xilinx impact have different chain and part number schemes
  #   impact: 1-based, 1 is first in chain;
  #   UrJtag: 0-based, 0 is last in chain;
  # e.g. on Digilent Nexys2:
  #   impact: (1) FPGA  (2) PROM
  #   UrJtag: (1) FPGA  (0) PROM

  my $jtag_part = $#plist + 1 - $pfpga;

  # handle USB VID/PID of board
  #  taken from RETRO_FX2_VID and RETRO_FX2_PID environment variables
  #  in the retro11 project the default is:
  #    VID: 16c0  (VOTI)
  #    PID: 03ef  (VOTI free for internal lab use 1007)
  #
  #   !! Important Note on Usage of this USB VID/PID !!
  #   This VID/PID is owned by VOTI, a small dutch company. Usage is granted
  #   for 'internal lab use only' by VOTI under the conditions:
  #     - the gadgets in which you use those PIDs do not leave your desk
  #     - you won't complain to VOTI if you get in trouble with duplicate PIDs
  #       (for instance because someone else did not follow the previous rule).
  #   See also http://www.voti.nl/pids/pidfaq.html
  #

  my $fx2_vid = $ENV{RETRO_FX2_VID};
  my $fx2_pid = $ENV{RETRO_FX2_PID};
  $fx2_vid = "16c0" unless defined $fx2_vid;
  $fx2_pid = "03ef" unless defined $fx2_pid;

  # give vid/pid with 0x prefix. jtag #2007 requires this, #1502 tolerates
  print  OFILE "cable usbblaster vid=0x$fx2_vid pid=0x$fx2_pid\n";
  printf OFILE "bsdl path %s\n", $bpath;
  print  OFILE "detect\n";
  printf OFILE "part %d\n", $jtag_part;
  printf OFILE "svf %s\n", $file;

  close (OFILE) or die "Couldn't close tmp cmd file: $!";

  my $rc  = run_command("jtag", $tmpfile);
  exit $rc;

# ----- bit2svf action --------------------------------------------------------
} elsif ($cmd eq "bit2svf") {
  my $ofile = $file;
  $ofile =~ s/\.bit/\.svf/;

  my $tmpfile = "tmp_config_wrapper.cmd";
  open (OFILE, ">$tmpfile") or die "Couldn't open tmp cmd file: $!";

  print  OFILE "setMode -bs\n";
  printf OFILE "setCable -port svf -file %s\n", $ofile;
  printf OFILE "addDevice -p 1 -file %s\n", $file;
  print  OFILE "program -p 1\n";
  print  OFILE "quit\n";

  close (OFILE) or die "Couldn't close tmp cmd file: $!";

  my $rc  = run_command("impact -batch", $tmpfile);
  exit $rc;
}

print STDERR "config_wrapper-E: command must be bit2svf, iconfig or jconfig\n";
exit 1;

#-------------------------------------------------------------------------------

sub run_command {

  my ($cmd, $tmpfile) = @_;

  my $wrc;
  if (defined $opts{dry_run}) {
    print STDOUT "$cmd\n";
    $wrc = system "/bin/sh", "-c", "cat $tmpfile";
  } else {
    $wrc = system "/bin/sh", "-c", "$cmd $tmpfile";
  }

  my $rc  = 0;
  if ($wrc != 0) {
    my $rc = int($wrc/256);
    if ($rc == 0) {
      my $sig = $wrc % 256;
      print STDERR "config_wrapper-I $cmd aborted by signal $sig\n";
      $rc = 1;
    } else {
      print STDERR "config_wrapper-I $cmd failed (rc=$rc) $?\n";
    }
  }

  unlink $tmpfile or die "Couldn't delete tmp cmd file: $!";
  return $rc;
}

#-------------------------------------------------------------------------------

sub print_help {
  print "usage: config_wrapper [--help] [--board=b] [--path=p] cmd file\n";
  print "  cmd              bit2svf or iconfig or jconfig\n";
  print "  --help           this message\n";
  print "  --dry_run        print impact command list\n";
  print "  --board=b        type of board\n";
  print "  --path=p         type of fpga\n";
}