brcm2708: rename target to bcm27xx

This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 533 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-4.19/950-0055-scripts-Add-mkknlimg-and-knlinfo-scripts-from-tools-.patch b/target/linux/bcm27xx/patches-4.19/950-0055-scripts-Add-mkknlimg-and-knlinfo-scripts-from-tools-.patch
new file mode 100644
index 0000000000..e6bb9fa388
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0055-scripts-Add-mkknlimg-and-knlinfo-scripts-from-tools-.patch
@@ -0,0 +1,533 @@
+From 28951ab97e67b20640b183364d2396e91e8a6148 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Mon, 11 May 2015 09:00:42 +0100
+Subject: [PATCH] scripts: Add mkknlimg and knlinfo scripts from tools
+ repo
+
+The Raspberry Pi firmware looks for a trailer on the kernel image to
+determine whether it was compiled with Device Tree support enabled.
+If the firmware finds a kernel without this trailer, or which has a
+trailer indicating that it isn't DT-capable, it disables DT support
+and reverts to using ATAGs.
+
+The mkknlimg utility adds that trailer, having first analysed the
+image to look for signs of DT support and the kernel version string.
+
+knlinfo displays the contents of the trailer in the given kernel image.
+
+scripts/mkknlimg: Add support for ARCH_BCM2835
+
+Add a new trailer field indicating whether this is an ARCH_BCM2835
+build, as opposed to MACH_BCM2708/9. If the loader finds this flag
+is set it changes the default base dtb file name from bcm270x...
+to bcm283y...
+
+Also update knlinfo to show the status of the field.
+
+scripts/mkknlimg: Improve ARCH_BCM2835 detection
+
+The board support code contains sufficient strings to be able to
+distinguish 2708 vs. 2835 builds, so remove the check for
+bcm2835-pm-wdt which could exist in either.
+
+Also, since the canned configuration is no longer built in (it's
+a module), remove the config string checking.
+
+See: https://github.com/raspberrypi/linux/issues/1157
+
+scripts: Multi-platform support for mkknlimg and knlinfo
+
+The firmware uses tags in the kernel trailer to choose which dtb file
+to load. Current firmware loads bcm2835-*.dtb if the '283x' tag is true,
+otherwise it loads bcm270*.dtb. This scheme breaks if an image supports
+multiple platforms.
+
+This patch adds '270X' and '283X' tags to indicate support for RPi and
+upstream platforms, respectively. '283x' (note lower case 'x') is left
+for old firmware, and is only set if the image only supports upstream
+builds.
+
+scripts/mkknlimg: Append a trailer for all input
+
+Now that the firmware assumes an unsigned kernel is DT-capable, it is
+helpful to be able to mark a kernel as being non-DT-capable.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+
+scripts/knlinfo: Decode DDTK atom
+
+Show the DDTK atom as being a boolean.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+
+mkknlimg: Retain downstream-kernel detection
+
+With the death of ARCH_BCM2708 and ARCH_BCM2709, a new way is needed to
+determine if this is a "downstream" build that wants the firmware to
+load a bcm27xx .dtb. The vc_cma driver is used downstream but not
+upstream, making vc_cma_init a suitable predicate symbol.
+
+mkknlimg: Find some more downstream-only strings
+
+See: https://github.com/raspberrypi/linux/issues/1920
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+
+scripts: Update mkknlimg, just in case
+
+With the removal of the vc_cma driver, mkknlimg lost an indication that
+the user had built a downstream kernel. Update the script, adding a few
+more key strings, in case it is still being used.
+
+Note that mkknlimg is now deprecated, except to tag kernels as upstream
+(283x), and thus requiring upstream DTBs.
+
+See: https://github.com/raspberrypi/linux/issues/2239
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ scripts/knlinfo  | 171 +++++++++++++++++++++++++++++++
+ scripts/mkknlimg | 262 +++++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 433 insertions(+)
+ create mode 100755 scripts/knlinfo
+ create mode 100755 scripts/mkknlimg
+
+--- /dev/null
++++ b/scripts/knlinfo
+@@ -0,0 +1,171 @@
++#!/usr/bin/env perl
++# ----------------------------------------------------------------------
++# knlinfo by Phil Elwell for Raspberry Pi
++#
++# (c) 2014,2015 Raspberry Pi (Trading) Limited <info@raspberrypi.org>
++#
++# Licensed under the terms of the GNU General Public License.
++# ----------------------------------------------------------------------
++
++use strict;
++use integer;
++
++use Fcntl ":seek";
++
++my $trailer_magic = 'RPTL';
++
++my %atom_formats =
++(
++    'DDTK' => \&format_bool,
++    'DTOK' => \&format_bool,
++    'KVer' => \&format_string,
++    '270X' => \&format_bool,
++    '283X' => \&format_bool,
++    '283x' => \&format_bool,
++);
++
++if (@ARGV != 1)
++{
++	print ("Usage: knlinfo <kernel image>\n");
++	exit(1);
++}
++
++my $kernel_file = $ARGV[0];
++
++
++my ($atoms, $pos) = read_trailer($kernel_file);
++
++exit(1) if (!$atoms);
++
++printf("Kernel trailer found at %d/0x%x:\n", $pos, $pos);
++
++foreach my $atom (@$atoms)
++{
++    printf("  %s: %s\n", $atom->[0], format_atom($atom));
++}
++
++exit(0);
++
++sub read_trailer
++{
++	my ($kernel_file) = @_;
++	my $fh;
++
++	if (!open($fh, '<', $kernel_file))
++	{
++		print ("* Failed to open '$kernel_file'\n");
++		return undef;
++	}
++
++	if (!seek($fh, -12, SEEK_END))
++	{
++		print ("* seek error in '$kernel_file'\n");
++		return undef;
++	}
++
++	my $last_bytes;
++	sysread($fh, $last_bytes, 12);
++
++	my ($trailer_len, $data_len, $magic) = unpack('VVa4', $last_bytes);
++
++	if (($magic ne $trailer_magic) || ($data_len != 4))
++	{
++		print ("* no trailer\n");
++		return undef;
++	}
++	if (!seek($fh, -12, SEEK_END))
++	{
++		print ("* seek error in '$kernel_file'\n");
++		return undef;
++	}
++
++	$trailer_len -= 12;
++
++	while ($trailer_len > 0)
++	{
++		if ($trailer_len < 8)
++		{
++			print ("* truncated atom header in trailer\n");
++			return undef;
++		}
++		if (!seek($fh, -8, SEEK_CUR))
++		{
++			print ("* seek error in '$kernel_file'\n");
++			return undef;
++		}
++		$trailer_len -= 8;
++
++		my $atom_hdr;
++		sysread($fh, $atom_hdr, 8);
++		my ($atom_len, $atom_type) = unpack('Va4', $atom_hdr);
++
++		if ($trailer_len < $atom_len)
++		{
++			print ("* truncated atom data in trailer\n");
++			return undef;
++		}
++
++		my $rounded_len = (($atom_len + 3) & ~3);
++		if (!seek($fh, -(8 + $rounded_len), SEEK_CUR))
++		{
++			print ("* seek error in '$kernel_file'\n");
++			return undef;
++		}
++		$trailer_len -= $rounded_len;
++
++		my $atom_data;
++		sysread($fh, $atom_data, $atom_len);
++
++		if (!seek($fh, -$atom_len, SEEK_CUR))
++		{
++			print ("* seek error in '$kernel_file'\n");
++			return undef;
++		}
++
++		push @$atoms, [ $atom_type, $atom_data ];
++	}
++
++ 	if (($$atoms[-1][0] eq "\x00\x00\x00\x00") &&
++	    ($$atoms[-1][1] eq ""))
++	{
++		pop @$atoms;
++	}
++	else
++	{
++		print ("* end marker missing from trailer\n");
++	}
++
++	return ($atoms, tell($fh));
++}
++
++sub format_atom
++{
++    my ($atom) = @_;
++
++    my $format_func = $atom_formats{$atom->[0]} || \&format_hex;
++    return $format_func->($atom->[1]);
++}
++
++sub format_bool
++{
++    my ($data) = @_;
++    return unpack('V', $data) ? 'y' : 'n';
++}
++
++sub format_int
++{
++    my ($data) = @_;
++    return unpack('V', $data);
++}
++
++sub format_string
++{
++    my ($data) = @_;
++    return '"'.$data.'"';
++}
++
++sub format_hex
++{
++    my ($data) = @_;
++    return unpack('H*', $data);
++}
+--- /dev/null
++++ b/scripts/mkknlimg
+@@ -0,0 +1,262 @@
++#!/usr/bin/env perl
++# ----------------------------------------------------------------------
++# mkknlimg by Phil Elwell for Raspberry Pi
++# based on extract-ikconfig by Dick Streefland
++#
++# (c) 2009,2010 Dick Streefland <dick@streefland.net>
++# (c) 2014,2015 Raspberry Pi (Trading) Limited <info@raspberrypi.org>
++#
++# Licensed under the terms of the GNU General Public License.
++# ----------------------------------------------------------------------
++
++use strict;
++use warnings;
++use integer;
++
++use constant FLAG_PI   => 0x01;
++use constant FLAG_DTOK => 0x02;
++use constant FLAG_DDTK => 0x04;
++use constant FLAG_270X => 0x08;
++use constant FLAG_283X => 0x10;
++
++my $trailer_magic = 'RPTL';
++
++my $tmpfile1 = "/tmp/mkknlimg_$$.1";
++my $tmpfile2 = "/tmp/mkknlimg_$$.2";
++
++my $dtok = 0;
++my $ddtk = 0;
++my $is_270x = 0;
++my $is_283x = 0;
++
++while (@ARGV && ($ARGV[0] =~ /^-/))
++{
++    my $arg = shift(@ARGV);
++    if ($arg eq '--dtok')
++    {
++	$dtok = 1;
++    }
++    elsif ($arg eq '--ddtk')
++    {
++	$ddtk = 1;
++    }
++    elsif ($arg eq '--270x')
++    {
++	$is_270x = 1;
++    }
++    elsif ($arg eq '--283x')
++    {
++	$is_283x = 1;
++    }
++    else
++    {
++	print ("* Unknown option '$arg'\n");
++	usage();
++    }
++}
++
++usage() if (@ARGV != 2);
++
++my $kernel_file = $ARGV[0];
++my $out_file = $ARGV[1];
++
++if (! -r $kernel_file)
++{
++    print ("* File '$kernel_file' not found\n");
++    usage();
++}
++
++my $wanted_strings =
++{
++	'brcm,bcm2835-mmc' => FLAG_PI,
++	'brcm,bcm2835-sdhost' => FLAG_PI,
++	'brcm,bcm2835-gpio' => FLAG_PI | FLAG_DTOK,
++	'brcm,bcm2708-fb'   => FLAG_PI | FLAG_DTOK | FLAG_270X,
++	'brcm,bcm2708-usb'  => FLAG_PI | FLAG_DTOK | FLAG_270X,
++	'brcm,bcm2835' => FLAG_PI | FLAG_DTOK | FLAG_283X,
++	'brcm,bcm2836' => FLAG_PI | FLAG_DTOK | FLAG_283X,
++	'brcm,bcm2837' => FLAG_PI | FLAG_DTOK | FLAG_283X,
++	'of_cfs_init' => FLAG_DTOK | FLAG_DDTK,
++};
++
++my $res = try_extract($kernel_file, $tmpfile1);
++$res ||= try_decompress('\037\213\010', 'xy',    'gunzip', 0,
++			$kernel_file, $tmpfile1, $tmpfile2);
++$res ||= try_decompress('\3757zXZ\000', 'abcde', 'unxz --single-stream', -1,
++			$kernel_file, $tmpfile1, $tmpfile2);
++$res ||= try_decompress('BZh',          'xy',    'bunzip2', 0,
++			$kernel_file, $tmpfile1, $tmpfile2);
++$res ||= try_decompress('\135\0\0\0',   'xxx',   'unlzma', 0,
++			$kernel_file, $tmpfile1, $tmpfile2);
++$res ||= try_decompress('\211\114\132', 'xy',    'lzop -d', 0,
++			$kernel_file, $tmpfile1, $tmpfile2);
++$res ||= try_decompress('\002\041\114\030', 'xy',    'lz4 -d', 1,
++			$kernel_file, $tmpfile1, $tmpfile2);
++
++my $append_trailer;
++my $trailer;
++my $kver = '?';
++
++$append_trailer = 1;
++
++if ($res)
++{
++    $kver = $res->{'kver'} || '?';
++    my $flags = $res->{'flags'};
++    print("Version: $kver\n");
++
++    if ($flags & FLAG_PI)
++    {
++	$dtok ||= ($flags & FLAG_DTOK) != 0;
++	$is_270x ||= ($flags & FLAG_270X) != 0;
++	$is_283x ||= ($flags & FLAG_283X) != 0;
++	$ddtk ||= ($flags & FLAG_DDTK) != 0;
++    }
++    else
++    {
++	print ("* This doesn't look like a Raspberry Pi kernel.\n");
++    }
++}
++elsif (!$dtok)
++{
++    print ("* Is this a valid kernel?\n");
++}
++
++if ($append_trailer)
++{
++    printf("DT: %s\n", $dtok ? "y" : "n");
++    printf("DDT: %s\n", $ddtk ? "y" : "n");
++    printf("270x: %s\n", $is_270x ? "y" : "n");
++    printf("283x: %s\n", $is_283x ? "y" : "n");
++
++    my @atoms;
++
++    push @atoms, [ $trailer_magic, pack('V', 0) ];
++    push @atoms, [ 'KVer', $kver ];
++    push @atoms, [ 'DTOK', pack('V', $dtok) ];
++    push @atoms, [ 'DDTK', pack('V', $ddtk) ];
++    push @atoms, [ '270X', pack('V', $is_270x) ];
++    push @atoms, [ '283X', pack('V', $is_283x) ];
++    push @atoms, [ '283x', pack('V', $is_283x && !$is_270x) ];
++
++    $trailer = pack_trailer(\@atoms);
++    $atoms[0]->[1] = pack('V', length($trailer));
++
++    $trailer = pack_trailer(\@atoms);
++}
++
++my $ofh;
++my $total_len = 0;
++
++if ($out_file eq $kernel_file)
++{
++    die "* Failed to open '$out_file' for append\n"
++	if (!open($ofh, '>>', $out_file));
++    $total_len = tell($ofh);
++}
++else
++{
++    die "* Failed to open '$kernel_file'\n"
++	if (!open(my $ifh, '<', $kernel_file));
++    die "* Failed to create '$out_file'\n"
++	if (!open($ofh, '>', $out_file));
++
++    my $copybuf;
++    while (1)
++    {
++	my $bytes = sysread($ifh, $copybuf, 64*1024);
++	last if (!$bytes);
++	syswrite($ofh, $copybuf, $bytes);
++	$total_len += $bytes;
++    }
++    close($ifh);
++}
++
++if ($trailer)
++{
++    # Pad to word-alignment
++    syswrite($ofh, "\x000\x000\x000", (-$total_len & 0x3));
++    syswrite($ofh, $trailer);
++}
++
++close($ofh);
++
++exit($trailer ? 0 : 1);
++
++END {
++	unlink($tmpfile1) if ($tmpfile1);
++	unlink($tmpfile2) if ($tmpfile2);
++}
++
++
++sub usage
++{
++	print ("Usage: mkknlimg [--dtok] [--270x] [--283x] <vmlinux|zImage|bzImage> <outfile>\n");
++	exit(1);
++}
++
++sub try_extract
++{
++	my ($knl, $tmp) = @_;
++
++	my $ver = `strings "$knl" | grep -a -E "^Linux version [1-9]"`;
++
++	return undef if (!$ver);
++
++	chomp($ver);
++
++	my $res = { 'kver'=>$ver };
++	$res->{'flags'} = strings_to_flags($knl, $wanted_strings);
++
++	return $res;
++}
++
++
++sub try_decompress
++{
++	my ($magic, $subst, $zcat, $idx, $knl, $tmp1, $tmp2) = @_;
++
++	my $pos = `tr "$magic\n$subst" "\n$subst=" < "$knl" | grep -abo "^$subst"`;
++	if ($pos)
++	{
++		chomp($pos);
++		$pos = (split(/[\r\n]+/, $pos))[$idx];
++		return undef if (!defined($pos));
++		$pos =~ s/:.*[\r\n]*$//s;
++		my $cmd = "tail -c+$pos \"$knl\" | $zcat > $tmp2 2> /dev/null";
++		my $err = (system($cmd) >> 8);
++		return undef if (($err != 0) && ($err != 2));
++
++		return try_extract($tmp2, $tmp1);
++	}
++
++	return undef;
++}
++
++sub strings_to_flags
++{
++	my ($knl, $strings) = @_;
++	my $string_pattern = '^('.join('|', keys(%$strings)).')$';
++	my $flags = 0;
++
++	my @matches = `strings \"$knl\" | grep -E \"$string_pattern\"`;
++	foreach my $match (@matches)
++	{
++	    chomp($match);
++	    $flags |= $strings->{$match};
++	}
++
++	return $flags;
++}
++
++sub pack_trailer
++{
++	my ($atoms) = @_;
++	my $trailer = pack('VV', 0, 0);
++	for (my $i = $#$atoms; $i>=0; $i--)
++	{
++		my $atom = $atoms->[$i];
++		$trailer .= pack('a*x!4Va4', $atom->[1], length($atom->[1]), $atom->[0]);
++	}
++	return $trailer;
++}