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#!/usr/bin/perl -w
# $Id: fx2load_wrapper 547 2013-12-29 13:10:07Z mueller $
#
# Copyright 2011-2013 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
# 2012-02-11   457   1.0.1  use RETRO_FX2_VID/PID; check iProduct string
# 2011-12-29   446   1.0    Initial version
#

use 5.005;                                  # require Perl 5.005 or higher
use strict;                                 # require strict checking
use FileHandle;
use Time::HiRes qw(usleep);

use Getopt::Long;

my %opts = ();

GetOptions(\%opts, "help", "dry_run", "force", "cycfx2prog",
           "board=s", "file=s", "ihx_path=s")
  or exit 1;

#
# setup defaults for board and file
#
if (not defined $opts{board}) {
  $opts{board} = "nexys2";
}
if (not defined $opts{file}) {
  $opts{file} = "nexys2_jtag_2fifo_as.ihx" if $opts{board} eq "nexys2";
  $opts{file} = "nexys3_jtag_2fifo_as.ihx" if $opts{board} eq "nexys3";
  $opts{file} = "nexys3_jtag_2fifo_as.ihx" if $opts{board} eq "atlys";
}
if (not defined $opts{ihx_path}) {
  unless (exists $ENV{RETROBASE}) {
    print STDERR "fx2load_wrapper-F: RETROBASE not set\n";
    exit 1;
  }
  $opts{ihx_path} = $ENV{RETROBASE} . "/tools/fx2/bin";
}

sub print_help;
sub run_command;
sub get_usb_id;
sub get_usb_prodinfo;

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

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

my $board = $opts{board};
my $ifile = $opts{file};

# setup digilent default usb id's

my $usbid_digi;

if    ($board eq "nexys2") { $usbid_digi = "1443:0005";}
elsif ($board eq "nexys3") { $usbid_digi = "1443:0007";}
elsif ($board eq "atlys")  { $usbid_digi = "1443:0007";}
else {
  print STDERR
    "fx2load_wrapper-E: only nexys2,3/atlys supported\n";
  exit 1;
}

# 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;

my $usbid_retro = "$fx2_vid:$fx2_pid";
my $n_digi  = 0;
my $n_retro = 0;

my $fx2_bus;
my $fx2_dev;
my $fx2_id;
my $fx2_prodinfo;

($n_digi, $n_retro, $fx2_bus, $fx2_dev, $fx2_id) = get_usb_id();

if ($n_digi+$n_retro == 0) {
  print STDERR "fx2load_wrapper-E no board detected\n";
  exit 1;
}
if ($n_digi+$n_retro > 1) {
  print STDERR "fx2load_wrapper-E more than one board detected\n";
  exit 1;
}

if ($n_retro > 0) {
  $fx2_prodinfo = get_usb_prodinfo($fx2_id);
}

if ($n_retro == 1 &&
    $opts{file} eq $fx2_prodinfo . ".ihx" &&
    (not defined $opts{force}) ) {
  print "fx2load_wrapper-I board already configured with $fx2_prodinfo.ihx\n";
  exit 0;
}

my $full_file = $opts{ihx_path} . "/" . $opts{file};
unless (-r $full_file) {
  print STDERR "fx2load_wrapper-E: ihx file \'$full_file\' not found\n";
  exit 1;
}

my $fx2_path = "/dev/bus/usb/$fx2_bus/$fx2_dev";

unless ( -r $fx2_path && -w $fx2_path)  {
  print STDERR 
    "fx2load_wrapper-E: usb device \'$fx2_path\' not user accessible\n";
  exit 1;
}

my $cmd;

if ($opts{cycfx2prog}) {
  my $proc = `which cycfx2prog`;
  chomp $proc;
  unless (-x $proc) {
    print STDERR "fx2load_wrapper-E: cycfx2prog not found or executable\n";
    exit 1;
  }
  $cmd = "cycfx2prog -id=$fx2_id prg:$full_file run";

} else {
  my $proc = `which fxload`;
  chomp $proc;
  $proc = "/sbin/fxload" if ($proc eq "");
  unless (-x $proc) {
    print STDERR "fx2load_wrapper-E: fxload not found or executable\n";
    exit 1;
  }
  $cmd = "$proc -t fx2 -I $full_file -D $fx2_path";
}

my $rc = 0;
if (defined $opts{dry_run}) {
  print "$cmd\n";
} else {
  print "fx2load_wrapper-I: loading $opts{file}\n";
  $rc = run_command($cmd);
  print "fx2load_wrapper-I: loaded $opts{file}\n";
  usleep(1500000);
}

exit $rc;

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

sub run_command {

  my ($cmd) = @_;

  my $wrc = system "/bin/sh", "-c", "$cmd";

  my $rc  = 0;
  if ($wrc != 0) {
    my $rc = int($wrc/256);
    if ($rc == 0) {
      my $sig = $wrc % 256;
      print STDERR "fx2load_wrapper-E \'$cmd\' aborted by signal $sig\n";
      $rc = 1;
    } else {
      print STDERR "fx2load_wrapper-E \'$cmd\' failed (rc=$rc) $?\n";
    }
  }

  return $rc;
}

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

sub print_help {
  print "usage: fx2load_wrapper [--board=b] [--file=f] [OPTIONS]\n";
  print "  --help           this message\n";
  print "  --dry_run        print command only\n";
  print "  --force          reload even when proper firmware detected\n";
  print "  --cycfx2prog     use cycfx2prog instead of fxload\n";
  print "  --board=b        type of board (default nexys2)\n";
  print "  --file=f         ihx file to load (default 2fifo_as)\n";
  print "  --ihx_path=p     path to ihx files\n";
}


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

sub get_usb_id {
  my @lsusb = `lsusb`;

  my $n_digi  = 0;
  my $n_retro = 0;
  my $fx2_bus;
  my $fx2_dev;
  my $fx2_id;

  foreach (@lsusb) {
    if (/^Bus\s+(\d+)\s+Device\s+(\d+):\s+ID\s+([:0-9a-f]+)\s+(.*)$/) {
      my ($bus,$dev,$id,$text) = ($1,$2,$3,$4);
      my $match = 0;
      if ($id eq $usbid_digi) {
        $n_digi += 1;
        $match = 1;
      } elsif ($id eq $usbid_retro) {
        $n_retro += 1;
        $match = 1;
      }
      if ($match) {
        $fx2_bus = $bus;
        $fx2_dev = $dev;
        $fx2_id  = $id;
      }
    }
  }

  return ($n_digi, $n_retro, $fx2_bus, $fx2_dev, $fx2_id);

}

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

sub get_usb_prodinfo {
  my ($fx2_id) = @_;
  my @lsusb = `lsusb -d $fx2_id -v`;
  foreach (@lsusb) {
    if (/^\s*iProduct\s*\d*\s*(.*)$/) {
      return $1;
    }
  }
  return "";
}