--- /dev/null
+i2c-tools CHANGES
+-----------------
+
+3.0.2 (2008-11-29)
+ i2c-dev.h: Drop I2C_FUNC_SMBUS_*I2C_BLOCK_2 defines
+ decode-dimms: Add support for little-endian word hexdumps
+ Only export the ceil function from POSIX
+ decode-vaio: Remove history
+ i2cdetect: Support i2c bus passed by name
+ Shorten the usage message
+ i2cdump: Support i2c bus passed by name
+ Shorten the usage message
+ Restrict the chip address to 0x03-0x77
+ Split the functionality checking code into a separate function
+ Better error message on missing adapter functionality
+ i2cget: Support i2c bus passed by name
+ Shorten the usage message
+ Better error message on missing adapter functionality
+ i2cset: Support i2c bus passed by name
+ Shorten the usage message
+ Restrict the chip address to 0x03-0x77
+ Split the code into several functions for clarity
+ Add support for short writes (SMBus send byte)
+ Better error message on missing adapter functionality
+ Set the data value mask with -m
+ Make reading back the written value optional
+ i2c-stub-from-dump: Add support for partial dumps
+ Report if only garbage is found in dump file
+ Behave properly when i2c-stub is already loaded
+ Stop on i2cset error
+
+3.0.1 (2008-04-04)
+ Drop the trailing .pl from all perl script names
+ decode-dimms: Fix DDR2 SDRAM module speed decoding
+ Update manufacturer IDs
+ Don't print anything by default if checksum fails
+ Decode all DDR2 SDRAM timing information
+ Add support for reading SPD data from hexdumps
+ Make command line parsing more robust
+ decode-vaio: Private data might not be readable by non-root users
+ Print the asset tag
+ Fix the timestamp decoding
+ i2cdump: Fix I2C block mode error code
+ Remove man page reference to hardware monitoring chips
+ Let the user specify a register range
+ i2cset: Final status messages go to stdout
+ Return success even when readback fails or doesn't match
+ i2c-stub-from-dump: New helper script to use with i2c-stub
+
+3.0.0 (2007-10-14)
+ Initial release
--- /dev/null
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+
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+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
--- /dev/null
+# I2C tools for Linux
+#
+# Copyright (C) 2007 Jean Delvare <khali@linux-fr.org>
+#
+# Licensed under the GNU General Public License.
+
+DESTDIR =
+prefix = /usr/local
+bindir = $(prefix)/bin
+sbindir = $(prefix)/sbin
+mandir = $(prefix)/share/man
+man8dir = $(mandir)/man8
+incdir = $(prefix)/include
+
+INSTALL := install
+INSTALL_DATA := $(INSTALL) -m 644
+INSTALL_DIR := $(INSTALL) -m 755 -d
+INSTALL_PROGRAM := $(INSTALL) -m 755
+RM := rm -f
+
+CC := gcc
+CFLAGS := -Wall
+
+CFLAGS += -O2
+# When debugging, use the following instead
+#CFLAGS += -O -g
+
+KERNELVERSION := $(shell uname -r)
+
+.PHONY: all strip clean install uninstall
+
+all:
+
+include eeprom/Module.mk
+include include/Module.mk
+include stub/Module.mk
+include tools/Module.mk
--- /dev/null
+I2C TOOLS FOR LINUX
+===================
+
+This package contains an heterogeneous set of I2C tools for Linux. These tools
+were originally part of the lm-sensors package but were finally split into
+their own package for convenience.
+
+
+CONTENTS
+--------
+
+The various tools included in this package are grouped by category, each
+category has its own sub-directory:
+
+* eeprom
+ Perl scripts for decoding different types of EEPROMs (SPD, EDID...) These
+ scripts rely on the "eeprom" kernel driver. They are installed by default.
+
+* eepromer
+ Tools for writing to EEPROMs. These tools rely on the "i2c-dev" kernel
+ driver. They are not installed by default.
+
+* include
+ C/C++ header files for I2C and SMBus access over i2c-dev. Installed by
+ default.
+
+* py-smbus
+ Python wrapper for SMBus access over i2c-dev. Not installed by default.
+
+* stub
+ A helper script to use with the i2c-stub kernel driver. Installed by
+ default.
+
+* tools
+ I2C device detection and register dump tools. These tools rely on the
+ "i2c-dev" kernel driver. They are installed by default.
+
+
+INSTALLATION
+------------
+
+There's no configure script, so simply run "make" to build the tools, and
+"make install" to install them. You also can use "make uninstall" to remove
+all the files you installed. By default, files are installed in /usr/local
+but you can change this behavior by editing the Makefile file and setting
+prefix to wherever you want. You may change the C compiler and the
+compilation flags as well.
+
+Optionally, you can run "make strip" prior to "make install" if you want
+smaller binaries. However, be aware that this will prevent any further
+attempt to debug the programs.
+
+
+DOCUMENTATION
+-------------
+
+The main tools have manual pages, which are installed by "make install".
+See these manual pages for command line interface details and tool specific
+information.
+
+The other tools come with simple text documentation, which isn't installed.
--- /dev/null
+# EEPROM decoding scripts for the Linux eeprom driver
+#
+# Copyright (C) 2007-2008 Jean Delvare <khali@linux-fr.org>
+#
+# Licensed under the GNU General Public License.
+
+EEPROM_DIR := eeprom
+
+EEPROM_TARGETS := decode-dimms decode-vaio ddcmon decode-edid
+
+# decode-xeon was not yet ported to the Linux 2.6 sysfs interface
+ifeq (,$(findstring /2.6., /$(KERNELVERSION)))
+EEPROM_TARGETS += decode-xeon
+endif
+
+#
+# Commands
+#
+
+install-eeprom: $(addprefix $(EEPROM_DIR)/,$(EEPROM_TARGETS))
+ $(INSTALL_DIR) $(DESTDIR)$(bindir)
+ for program in $(EEPROM_TARGETS) ; do \
+ $(INSTALL_PROGRAM) $(EEPROM_DIR)/$$program $(DESTDIR)$(bindir) ; done
+
+uninstall-eeprom:
+ for program in $(EEPROM_TARGETS) ; do \
+ $(RM) $(DESTDIR)$(bindir)/$$program ; done
+
+install: install-eeprom
+
+uninstall: uninstall-eeprom
--- /dev/null
+This directory contains scripts to decode the data exposed by the eeprom
+Linux kernel driver.
+
+* decode-dimms (perl script)
+ Decode the information found in memory module SPD EEPROMs. The SPD
+ data is read either from the running system or from dump files.
+
+* decode-vaio (perl script)
+ Decode the information found in Sony Vaio laptop identification EEPROMs.
+
+* ddcmon (perl script)
+ decode-edid (perl script)
+ Decode the information found in monitor EEPROMs. Both scripts require
+ an access to the DDC channel of the monitor. This is typically provided
+ by framebuffer drivers. decode-edid additionally requires parse-edid,
+ which is part of the read-edid package. ddcmon prints general
+ information, while decode-edid prints timing information for
+ inclusion into your X11 configuration file.
+
+* decode-xeon (perl script)
+ ID ROM data decoding for Xeon processors. Support for sysfs is still
+ missing, so this script doesn't work with 2.6 kernels yet.
--- /dev/null
+#!/usr/bin/perl -w
+#
+# Copyright (C) 2004-2005 Jean Delvare <khali@linux-fr.org>
+#
+# Parts inspired from decode-edid.
+# Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
+#
+# Parts inspired from the ddcmon driver and sensors' print_ddcmon function.
+# Copyright (C) 1998-2004 Mark D. Studebaker
+#
+# Parts inspired from the fbmon driver (Linux 2.6.10).
+# Copyright (C) 2002 James Simmons <jsimmons@users.sf.net>
+#
+# 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301 USA.
+#
+# Version 1.0 2005-01-04 Jean Delvare <khali@linux-fr.org>
+#
+# This script is a replacement for the now deprecated ddcmon kernel driver.
+# Instead of having a dedicated driver, it is better to reuse the standard
+# eeprom driver and implement the EDID-specific code in user-space.
+#
+# EDID (Extended Display Identification Data) is a VESA standard which
+# allows storing (on manufacturer's side) and retrieving (on user's side)
+# of configuration information about displays, such as manufacturer,
+# serial number, physical dimensions and allowed horizontal and vertical
+# refresh rates.
+#
+# Syntax: ddcmon [bus [address]]
+# Address can be given in decimal or hexadecimal (with a 0x prefix).
+# If no address is given, default is 0x50.
+# Bus number must be given in decimal. If no bus number is given,
+# try them all.
+
+use strict;
+use Fcntl qw(:DEFAULT :seek);
+use vars qw(@standard_scales);
+
+@standard_scales = ([1, 1], [3, 4], [4, 5], [16, 9]);
+
+# Make sure the eeprom module is loaded.
+# For non-modular kernels, we can't help.
+if (-r '/proc/modules')
+{
+ my $found = 0;
+ open(MODULES, '/proc/modules');
+ while (!$found && defined ($_ = <MODULES>))
+ {
+ $found++ if m/^eeprom\s+/;
+ }
+ close(MODULES);
+
+ unless ($found)
+ {
+ print STDERR
+ "This script requires the eeprom module to be loaded.\n";
+ exit 1;
+ }
+}
+
+# Only used for sysfs
+sub rawread
+{
+ my $filename = shift;
+ my $length = shift;
+ my $offset = shift || 0;
+ my $bytes = '';
+
+ sysopen(FH, $filename, O_RDONLY)
+ or die "Can't open $filename";
+ if ($offset)
+ {
+ sysseek(FH, $offset, SEEK_SET)
+ or die "Can't seek in $filename";
+ }
+
+ $offset = 0;
+ while ($length)
+ {
+ my $r = sysread(FH, $bytes, $length, $offset);
+ die "Can't read $filename"
+ unless defined($r);
+ die "Unexpected EOF in $filename"
+ unless $r;
+ $offset += $r;
+ $length -= $r;
+ }
+ close(FH);
+
+ return $bytes;
+}
+
+sub get_edid_sysfs
+{
+ my ($bus, $addr) = @_;
+
+ my @bytes = unpack("C*", rawread("/sys/bus/i2c/devices/$bus-00$addr/eeprom", 128));
+
+ return \@bytes;
+}
+
+sub get_edid_procfs
+{
+ my ($bus, $addr) = @_;
+
+ my @bytes;
+
+ for (my $i = 0 ; $i < 0x80; $i += 0x10)
+ {
+ my $filename = sprintf("/proc/sys/dev/sensors/eeprom-i2c-\%s-\%s/\%02x",
+ $bus, $addr, $i);
+ open(EEDATA, $filename)
+ or die "Can't read $filename";
+ push @bytes, split(/\s+/, <EEDATA>);
+ close(EEDATA);
+ }
+
+ return \@bytes;
+}
+
+sub print_line
+{
+ my $label = shift;
+ my $pattern = shift;
+
+ printf("\%-24s$pattern\n", $label.':', @_);
+}
+
+sub extract_byte
+{
+ my ($bytes, $offset) = @_;
+
+ return $bytes->[$offset];
+}
+
+sub extract_word
+{
+ my ($bytes, $offset) = @_;
+
+ return ($bytes->[$offset]
+ | ($bytes->[$offset+1] << 8));
+}
+
+sub extract_manufacturer
+{
+ my ($bytes, $offset) = @_;
+ my $i = ($bytes->[$offset+1] | ($bytes->[$offset] << 8));
+
+ return sprintf('%c%c%c',
+ (($i >> 10) & 0x1f) + ord('A') - 1,
+ (($i >> 5) & 0x1f) + ord('A') - 1,
+ ($i & 0x1f) + ord('A') - 1);
+}
+
+sub extract_sesquiword
+{
+ my ($bytes, $offset) = @_;
+
+ return ($bytes->[$offset]
+ | ($bytes->[$offset+1] << 8)
+ | ($bytes->[$offset+2] << 16));
+}
+
+sub extract_dword
+{
+ my ($bytes, $offset) = @_;
+
+ return ($bytes->[$offset]
+ | ($bytes->[$offset+1] << 8)
+ | ($bytes->[$offset+2] << 16)
+ | ($bytes->[$offset+3] << 24));
+}
+
+sub extract_display_input
+{
+ my ($bytes, $offset) = @_;
+
+ my @voltage = ('0.700V/0.300V', '0.714V/0.286V',
+ '1.000V/0.400V', '0.700V/0.000V');
+
+ return 'Digital'
+ if ($bytes->[$offset] & 0x80);
+
+ return 'Analog ('.$voltage[($bytes->[$offset] & 0x60) >> 5].')';
+}
+
+sub extract_dpms
+{
+ my ($bytes, $offset) = @_;
+
+ my @supported;
+
+ push @supported, 'Active Off' if ($bytes->[$offset] & 0x20);
+ push @supported, 'Suspend' if ($bytes->[$offset] & 0x40);
+ push @supported, 'Standby' if ($bytes->[$offset] & 0x80);
+
+ return join(', ', @supported)
+ if (@supported);
+
+ return 'None supported';
+}
+
+sub extract_color_mode
+{
+ my ($bytes, $offset) = @_;
+
+ my @mode = ('Monochrome', 'RGB Multicolor', 'Non-RGB Multicolor');
+
+ return $mode[($bytes->[$offset] >> 3) & 0x03];
+}
+
+sub good_signature
+{
+ my $bytes = shift;
+
+ return $bytes->[0] == 0x00
+ && $bytes->[1] == 0xff
+ && $bytes->[2] == 0xff
+ && $bytes->[3] == 0xff
+ && $bytes->[4] == 0xff
+ && $bytes->[5] == 0xff
+ && $bytes->[6] == 0xff
+ && $bytes->[7] == 0x00;
+}
+
+sub verify_checksum
+{
+ my $bytes = shift;
+ my $cs;
+
+ for (my $i = 0, $cs = 0; $i < 0x80; $i++)
+ {
+ $cs += $bytes->[$i];
+ }
+
+ return (($cs & 0xff) == 0 ? 'OK' : 'Not OK');
+}
+
+sub add_timing
+{
+ my ($timings, $new) = @_;
+
+ my $mode = sprintf('%ux%u@%u%s', $new->[0], $new->[1],
+ $new->[2], defined ($new->[3]) &&
+ $new->[3] eq 'interlaced' ? 'i' : '');
+
+ $timings->{$mode} = $new;
+}
+
+sub add_standard_timing
+{
+ my ($timings, $byte0, $byte1) = @_;
+
+ # Unused slot
+ return if ($byte0 == $byte1)
+ && ($byte0 == 0x01 || $byte0 == 0x00 || $byte0 == 0x20);
+
+ my $width = ($byte0 + 31) * 8;
+ my $height = $width * $standard_scales[$byte1 >> 6]->[0]
+ / $standard_scales[$byte1 >> 6]->[1];
+ my $refresh = 60 + ($byte1 & 0x3f);
+
+ add_timing($timings, [$width, $height, $refresh]);
+}
+
+sub sort_timings
+{
+ # First order by width
+ return -1 if $a->[0] < $b->[0];
+ return 1 if $a->[0] > $b->[0];
+
+ # Second by height
+ return -1 if $a->[1] < $b->[1];
+ return 1 if $a->[1] > $b->[1];
+
+ # Third by frequency
+ # Interlaced modes count for half their frequency
+ my $freq_a = $a->[2];
+ my $freq_b = $b->[2];
+ $freq_a /= 2 if defined $a->[3] && $a->[3] eq 'interlaced';
+ $freq_b /= 2 if defined $b->[3] && $b->[3] eq 'interlaced';
+ return -1 if $freq_a < $freq_b;
+ return 1 if $freq_a > $freq_b;
+
+ return 0;
+}
+
+sub print_timings
+{
+ my ($bytes, $timings) = @_;
+
+ # Established Timings
+ my @established =
+ (
+ [720, 400, 70],
+ [720, 400, 88],
+ [640, 480, 60],
+ [640, 480, 67],
+ [640, 480, 72],
+ [640, 480, 75],
+ [800, 600, 56],
+ [800, 600, 60],
+ [800, 600, 72],
+ [800, 600, 75],
+ [832, 624, 75],
+ [1024, 768, 87, 'interlaced'],
+ [1024, 768, 60],
+ [1024, 768, 70],
+ [1024, 768, 75],
+ [1280, 1024, 75],
+ undef, undef, undef,
+ [1152, 870, 75],
+ );
+ my $temp = extract_sesquiword($bytes, 0x23);
+ for (my $i = 0; $i < 24; $i++)
+ {
+ next unless defined($established[$i]);
+ add_timing($timings, $established[$i])
+ if ($temp & (1 << $i));
+ }
+
+ # Standard Timings
+ for (my $i = 0x26; $i < 0x36; $i += 2)
+ {
+ add_standard_timing($timings, $bytes->[$i], $bytes->[$i+1]);
+ }
+
+ foreach my $v (sort sort_timings values(%{$timings}))
+ {
+ print_line("Timing", '%ux%u @ %u Hz%s',
+ $v->[0], $v->[1], $v->[2],
+ defined($v->[3]) ? ' ('.$v->[3].')' : '');
+ }
+}
+
+sub extract_string
+{
+ my ($bytes, $offset) = @_;
+ my $string = '';
+
+ for (my $i = 5; $i < 18; $i++)
+ {
+ last if $bytes->[$offset+$i] == 0x0a
+ || $bytes->[$offset+$i] == 0x00;
+ $string .= chr($bytes->[$offset+$i])
+ if ($bytes->[$offset+$i] >= 32
+ && $bytes->[$offset+$i] < 127);
+ }
+ $string =~ s/\s+$//;
+
+ return $string;
+}
+
+# Some blocks contain different information:
+# 0x00, 0x00, 0x00, 0xfa: Additional standard timings block
+# 0x00, 0x00, 0x00, 0xfc: Monitor block
+# 0x00, 0x00, 0x00, 0xfd: Limits block
+# 0x00, 0x00, 0x00, 0xfe: Ascii block
+# 0x00, 0x00, 0x00, 0xff: Serial block
+# Return a reference to a hash containing all information.
+sub extract_detailed_timings
+{
+ my ($bytes) = @_;
+
+ my %info = ('timings' => {});
+
+ for (my $offset = 0x36; $offset < 0x7e; $offset += 18)
+ {
+ if ($bytes->[$offset] == 0x00
+ && $bytes->[$offset+1] == 0x00
+ && $bytes->[$offset+2] == 0x00
+ && $bytes->[$offset+4] == 0x00)
+ {
+ if ($bytes->[$offset+3] == 0xfa)
+ {
+ for (my $i = $offset + 5; $i < $offset + 17; $i += 2)
+ {
+ add_standard_timing($info{'timings'},
+ $bytes->[$i],
+ $bytes->[$i+1]);
+ }
+ }
+
+ elsif ($bytes->[$offset+3] == 0xfc)
+ {
+ $info{'monitor'} .= extract_string($bytes, $offset);
+ }
+
+ elsif ($bytes->[$offset+3] == 0xfd)
+ {
+ $info{'limits'}{'vsync_min'} = $bytes->[$offset+5];
+ $info{'limits'}{'vsync_max'} = $bytes->[$offset+6];
+ $info{'limits'}{'hsync_min'} = $bytes->[$offset+7];
+ $info{'limits'}{'hsync_max'} = $bytes->[$offset+8];
+ $info{'limits'}{'clock_max'} = $bytes->[$offset+9];
+ }
+
+ elsif ($bytes->[$offset+3] == 0xfe)
+ {
+ $info{'ascii'} .= extract_string($bytes, $offset);
+ }
+
+ elsif ($bytes->[$offset+3] == 0xff)
+ {
+ $info{'serial'} .= extract_string($bytes, $offset);
+ }
+
+ next;
+ }
+
+ # Detailed Timing
+ my $width = $bytes->[$offset+2] + (($bytes->[$offset+4] & 0xf0) << 4);
+ my $height = $bytes->[$offset+5] + (($bytes->[$offset+7] & 0xf0) << 4);
+ my $clock = extract_word($bytes, $offset) * 10000;
+ my $hblank = $bytes->[$offset+3] + (($bytes->[$offset+4] & 0x0f) << 8);
+ my $vblank = $bytes->[$offset+6] + (($bytes->[$offset+7] & 0x0f) << 8);
+ my $area = ($width + $hblank) * ($height + $vblank);
+ next unless $area; # Should not happen, but...
+ my $refresh = ($clock + $area / 2) / $area; # Proper rounding
+ add_timing($info{'timings'}, [$width, $height, $refresh]);
+ }
+
+ return \%info;
+}
+
+sub print_edid
+{
+ my ($bus, $address) = @_;
+ my $bytes;
+
+ if (-r "/sys/bus/i2c/devices/$bus-00$address/eeprom")
+ {
+ $bytes = get_edid_sysfs($bus, $address);
+ }
+ elsif (-r "/proc/sys/dev/sensors/eeprom-i2c-$bus-$address/00")
+ {
+ $bytes = get_edid_procfs($bus, $address);
+ }
+
+ return 1 unless defined $bytes;
+ return 2 unless good_signature($bytes);
+
+ print_line('Checksum', '%s', verify_checksum($bytes));
+ my $edid_version = extract_byte($bytes, 0x12);
+ my $edid_revision = extract_byte($bytes, 0x13);
+ print_line('EDID Version', '%u.%u', $edid_version,
+ $edid_revision);
+ if ($edid_version > 1 || $edid_revision > 2)
+ {
+ $standard_scales[0][0] = 16;
+ $standard_scales[0][1] = 10;
+ }
+ else
+ {
+ $standard_scales[0][0] = 1;
+ $standard_scales[0][1] = 1;
+ }
+
+ my $info = extract_detailed_timings($bytes);
+
+ print_line('Manufacturer ID', '%s', extract_manufacturer($bytes, 0x08));
+ print_line('Model Number', '0x%04X', extract_word($bytes, 0x0A));
+ print_line('Model Name', '%s', $info->{'monitor'})
+ if defined $info->{'monitor'};
+
+ if ($info->{'serial'})
+ {
+ print_line('Serial Number', '%s', $info->{'serial'})
+ }
+ elsif ((my $temp = extract_dword($bytes, 0x0C)))
+ {
+ print_line('Serial Number', '%u', $temp)
+ }
+
+ print_line('Manufacture Time', '%u-W%02u',
+ 1990 + extract_byte($bytes, 0x11),
+ extract_byte($bytes, 0x10));
+ print_line('Display Input', '%s', extract_display_input($bytes, 0x14));
+ print_line('Monitor Size (cm)', '%ux%u', extract_byte($bytes, 0x15),
+ extract_byte($bytes, 0x16));
+ print_line('Gamma Factor', '%.2f',
+ 1 + extract_byte($bytes, 0x17) / 100.0);
+ print_line('DPMS Modes', '%s', extract_dpms($bytes, 0x18));
+ print_line('Color Mode', '%s', extract_color_mode($bytes, 0x18))
+ if (($bytes->[0x18] & 0x18) != 0x18);
+ print_line('Additional Info', '%s', $info->{'ascii'})
+ if $info->{'ascii'};
+
+ if (defined($info->{'limits'}))
+ {
+ print_line('Vertical Sync (Hz)', '%u-%u',
+ $info->{'limits'}{'vsync_min'},
+ $info->{'limits'}{'vsync_max'});
+ print_line('Horizontal Sync (kHz)', '%u-%u',
+ $info->{'limits'}{'hsync_min'},
+ $info->{'limits'}{'hsync_max'});
+ print_line('Max Pixel Clock (MHz)', '%u',
+ $info->{'limits'}{'clock_max'} * 10)
+ unless $info->{'limits'}{'clock_max'} == 0xff;
+ }
+
+ print_timings($bytes, $info->{'timings'});
+ print("\n");
+ return 0;
+}
+
+# Get the address. Default to 0x50 if not given.
+my $address;
+if (defined($ARGV[1]))
+{
+ $address = $ARGV[1];
+ # Convert to decimal, whatever the value.
+ $address = oct $address if $address =~ m/^0/;
+ # Convert to an hexadecimal string.
+ $address = sprintf '%02x', $address;
+}
+else
+{
+ $address = '50';
+}
+
+if (defined($ARGV[0]))
+{
+ my $error = print_edid($ARGV[0], $address);
+
+ if ($error == 1)
+ {
+ print STDERR
+ "No EEPROM found at 0x$address on bus $ARGV[0].\n";
+ exit 1;
+ }
+ elsif ($error == 2)
+ {
+ print STDERR
+ "EEPROM found at 0x$address on bus $ARGV[0], but is not an EDID EEPROM.\n";
+ exit 1;
+ }
+}
+# If no bus is given, try them all.
+else
+{
+ my $total = 0;
+
+ for (my $i = 0; $i < 16; $i++)
+ {
+ $total++ unless print_edid($i, $address);
+ }
+
+ unless ($total)
+ {
+ print STDERR
+ "No EDID EEPROM found.\n";
+ exit 1;
+ }
+}
--- /dev/null
+#!/usr/bin/perl -w
+#
+# EEPROM data decoder for SDRAM DIMM modules
+#
+# Copyright 1998, 1999 Philip Edelbrock <phil@netroedge.com>
+# modified by Christian Zuckschwerdt <zany@triq.net>
+# modified by Burkart Lingner <burkart@bollchen.de>
+# Copyright (C) 2005-2008 Jean Delvare <khali@linux-fr.org>
+#
+# 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301 USA.
+#
+#
+# The eeprom driver must be loaded (unless option -x is used). For kernels
+# older than 2.6.0, the eeprom driver can be found in the lm-sensors package.
+#
+# References:
+# PC SDRAM Serial Presence
+# Detect (SPD) Specification, Intel,
+# 1997,1999, Rev 1.2B
+#
+# Jedec Standards 4.1.x & 4.5.x
+# http://www.jedec.org
+#
+
+require 5.004;
+
+use strict;
+use POSIX qw(ceil);
+use Fcntl qw(:DEFAULT :seek);
+use vars qw($opt_html $opt_bodyonly $opt_igncheck $use_sysfs $use_hexdump
+ @vendors %decode_callback $revision @dimm_list %hexdump_cache);
+
+use constant LITTLEENDIAN => "little-endian";
+use constant BIGENDIAN => "big-endian";
+
+$revision = '$Revision: 5388 $ ($Date: 2008-11-18 18:15:09 +0100 (mar. 18 nov. 2008) $)';
+$revision =~ s/\$\w+: (.*?) \$/$1/g;
+$revision =~ s/ \([^()]*\)//;
+
+@vendors = (
+["AMD", "AMI", "Fairchild", "Fujitsu",
+ "GTE", "Harris", "Hitachi", "Inmos",
+ "Intel", "I.T.T.", "Intersil", "Monolithic Memories",
+ "Mostek", "Freescale (former Motorola)", "National", "NEC",
+ "RCA", "Raytheon", "Conexant (Rockwell)", "Seeq",
+ "NXP (former Signetics, Philips Semi.)", "Synertek", "Texas Instruments", "Toshiba",
+ "Xicor", "Zilog", "Eurotechnique", "Mitsubishi",
+ "Lucent (AT&T)", "Exel", "Atmel", "SGS/Thomson",
+ "Lattice Semi.", "NCR", "Wafer Scale Integration", "IBM",
+ "Tristar", "Visic", "Intl. CMOS Technology", "SSSI",
+ "MicrochipTechnology", "Ricoh Ltd.", "VLSI", "Micron Technology",
+ "Hyundai Electronics", "OKI Semiconductor", "ACTEL", "Sharp",
+ "Catalyst", "Panasonic", "IDT", "Cypress",
+ "DEC", "LSI Logic", "Zarlink (former Plessey)", "UTMC",
+ "Thinking Machine", "Thomson CSF", "Integrated CMOS (Vertex)", "Honeywell",
+ "Tektronix", "Sun Microsystems", "SST", "ProMos/Mosel Vitelic",
+ "Infineon (former Siemens)", "Macronix", "Xerox", "Plus Logic",
+ "SunDisk", "Elan Circuit Tech.", "European Silicon Str.", "Apple Computer",
+ "Xilinx", "Compaq", "Protocol Engines", "SCI",
+ "Seiko Instruments", "Samsung", "I3 Design System", "Klic",
+ "Crosspoint Solutions", "Alliance Semiconductor", "Tandem", "Hewlett-Packard",
+ "Intg. Silicon Solutions", "Brooktree", "New Media", "MHS Electronic",
+ "Performance Semi.", "Winbond Electronic", "Kawasaki Steel", "Bright Micro",
+ "TECMAR", "Exar", "PCMCIA", "LG Semi (former Goldstar)",
+ "Northern Telecom", "Sanyo", "Array Microsystems", "Crystal Semiconductor",
+ "Analog Devices", "PMC-Sierra", "Asparix", "Convex Computer",
+ "Quality Semiconductor", "Nimbus Technology", "Transwitch", "Micronas (ITT Intermetall)",
+ "Cannon", "Altera", "NEXCOM", "QUALCOMM",
+ "Sony", "Cray Research", "AMS(Austria Micro)", "Vitesse",
+ "Aster Electronics", "Bay Networks (Synoptic)", "Zentrum or ZMD", "TRW",
+ "Thesys", "Solbourne Computer", "Allied-Signal", "Dialog",
+ "Media Vision", "Level One Communication"],
+["Cirrus Logic", "National Instruments", "ILC Data Device", "Alcatel Mietec",
+ "Micro Linear", "Univ. of NC", "JTAG Technologies", "BAE Systems",
+ "Nchip", "Galileo Tech", "Bestlink Systems", "Graychip",
+ "GENNUM", "VideoLogic", "Robert Bosch", "Chip Express",
+ "DATARAM", "United Microelec Corp.", "TCSI", "Smart Modular",
+ "Hughes Aircraft", "Lanstar Semiconductor", "Qlogic", "Kingston",
+ "Music Semi", "Ericsson Components", "SpaSE", "Eon Silicon Devices",
+ "Programmable Micro Corp", "DoD", "Integ. Memories Tech.", "Corollary Inc.",
+ "Dallas Semiconductor", "Omnivision", "EIV(Switzerland)", "Novatel Wireless",
+ "Zarlink (former Mitel)", "Clearpoint", "Cabletron", "STEC (former Silicon Technology)",
+ "Vanguard", "Hagiwara Sys-Com", "Vantis", "Celestica",
+ "Century", "Hal Computers", "Rohm Company Ltd.", "Juniper Networks",
+ "Libit Signal Processing", "Mushkin Enhanced Memory", "Tundra Semiconductor", "Adaptec Inc.",
+ "LightSpeed Semi.", "ZSP Corp.", "AMIC Technology", "Adobe Systems",
+ "Dynachip", "PNY Electronics", "Newport Digital", "MMC Networks",
+ "T Square", "Seiko Epson", "Broadcom", "Viking Components",
+ "V3 Semiconductor", "Flextronics (former Orbit)", "Suwa Electronics", "Transmeta",
+ "Micron CMS", "American Computer & Digital Components Inc", "Enhance 3000 Inc", "Tower Semiconductor",
+ "CPU Design", "Price Point", "Maxim Integrated Product", "Tellabs",
+ "Centaur Technology", "Unigen Corporation", "Transcend Information", "Memory Card Technology",
+ "CKD Corporation Ltd.", "Capital Instruments, Inc.", "Aica Kogyo, Ltd.", "Linvex Technology",
+ "MSC Vertriebs GmbH", "AKM Company, Ltd.", "Dynamem, Inc.", "NERA ASA",
+ "GSI Technology", "Dane-Elec (C Memory)", "Acorn Computers", "Lara Technology",
+ "Oak Technology, Inc.", "Itec Memory", "Tanisys Technology", "Truevision",
+ "Wintec Industries", "Super PC Memory", "MGV Memory", "Galvantech",
+ "Gadzoox Nteworks", "Multi Dimensional Cons.", "GateField", "Integrated Memory System",
+ "Triscend", "XaQti", "Goldenram", "Clear Logic",
+ "Cimaron Communications", "Nippon Steel Semi. Corp.", "Advantage Memory", "AMCC",
+ "LeCroy", "Yamaha Corporation", "Digital Microwave", "NetLogic Microsystems",
+ "MIMOS Semiconductor", "Advanced Fibre", "BF Goodrich Data.", "Epigram",
+ "Acbel Polytech Inc.", "Apacer Technology", "Admor Memory", "FOXCONN",
+ "Quadratics Superconductor", "3COM"],
+["Camintonn Corporation", "ISOA Incorporated", "Agate Semiconductor", "ADMtek Incorporated",
+ "HYPERTEC", "Adhoc Technologies", "MOSAID Technologies", "Ardent Technologies",
+ "Switchcore", "Cisco Systems, Inc.", "Allayer Technologies", "WorkX AG",
+ "Oasis Semiconductor", "Novanet Semiconductor", "E-M Solutions", "Power General",
+ "Advanced Hardware Arch.", "Inova Semiconductors GmbH", "Telocity", "Delkin Devices",
+ "Symagery Microsystems", "C-Port Corporation", "SiberCore Technologies", "Southland Microsystems",
+ "Malleable Technologies", "Kendin Communications", "Great Technology Microcomputer", "Sanmina Corporation",
+ "HADCO Corporation", "Corsair", "Actrans System Inc.", "ALPHA Technologies",
+ "Silicon Laboratories, Inc. (Cygnal)", "Artesyn Technologies", "Align Manufacturing", "Peregrine Semiconductor",
+ "Chameleon Systems", "Aplus Flash Technology", "MIPS Technologies", "Chrysalis ITS",
+ "ADTEC Corporation", "Kentron Technologies", "Win Technologies", "Tachyon Semiconductor (former ASIC Designs Inc.)",
+ "Extreme Packet Devices", "RF Micro Devices", "Siemens AG", "Sarnoff Corporation",
+ "Itautec Philco SA", "Radiata Inc.", "Benchmark Elect. (AVEX)", "Legend",
+ "SpecTek Incorporated", "Hi/fn", "Enikia Incorporated", "SwitchOn Networks",
+ "AANetcom Incorporated", "Micro Memory Bank", "ESS Technology", "Virata Corporation",
+ "Excess Bandwidth", "West Bay Semiconductor", "DSP Group", "Newport Communications",
+ "Chip2Chip Incorporated", "Phobos Corporation", "Intellitech Corporation", "Nordic VLSI ASA",
+ "Ishoni Networks", "Silicon Spice", "Alchemy Semiconductor", "Agilent Technologies",
+ "Centillium Communications", "W.L. Gore", "HanBit Electronics", "GlobeSpan",
+ "Element 14", "Pycon", "Saifun Semiconductors", "Sibyte, Incorporated",
+ "MetaLink Technologies", "Feiya Technology", "I & C Technology", "Shikatronics",
+ "Elektrobit", "Megic", "Com-Tier", "Malaysia Micro Solutions",
+ "Hyperchip", "Gemstone Communications", "Anadigm (former Anadyne)", "3ParData",
+ "Mellanox Technologies", "Tenx Technologies", "Helix AG", "Domosys",
+ "Skyup Technology", "HiNT Corporation", "Chiaro", "MDT Technologies GmbH (former MCI Computer GMBH)",
+ "Exbit Technology A/S", "Integrated Technology Express", "AVED Memory", "Legerity",
+ "Jasmine Networks", "Caspian Networks", "nCUBE", "Silicon Access Networks",
+ "FDK Corporation", "High Bandwidth Access", "MultiLink Technology", "BRECIS",
+ "World Wide Packets", "APW", "Chicory Systems", "Xstream Logic",
+ "Fast-Chip", "Zucotto Wireless", "Realchip", "Galaxy Power",
+ "eSilicon", "Morphics Technology", "Accelerant Networks", "Silicon Wave",
+ "SandCraft", "Elpida"],
+["Solectron", "Optosys Technologies", "Buffalo (former Melco)", "TriMedia Technologies",
+ "Cyan Technologies", "Global Locate", "Optillion", "Terago Communications",
+ "Ikanos Communications", "Princeton Technology", "Nanya Technology", "Elite Flash Storage",
+ "Mysticom", "LightSand Communications", "ATI Technologies", "Agere Systems",
+ "NeoMagic", "AuroraNetics", "Golden Empire", "Mushkin",
+ "Tioga Technologies", "Netlist", "TeraLogic", "Cicada Semiconductor",
+ "Centon Electronics", "Tyco Electronics", "Magis Works", "Zettacom",
+ "Cogency Semiconductor", "Chipcon AS", "Aspex Technology", "F5 Networks",
+ "Programmable Silicon Solutions", "ChipWrights", "Acorn Networks", "Quicklogic",
+ "Kingmax Semiconductor", "BOPS", "Flasys", "BitBlitz Communications",
+ "eMemory Technology", "Procket Networks", "Purple Ray", "Trebia Networks",
+ "Delta Electronics", "Onex Communications", "Ample Communications", "Memory Experts Intl",
+ "Astute Networks", "Azanda Network Devices", "Dibcom", "Tekmos",
+ "API NetWorks", "Bay Microsystems", "Firecron Ltd", "Resonext Communications",
+ "Tachys Technologies", "Equator Technology", "Concept Computer", "SILCOM",
+ "3Dlabs", "c't Magazine", "Sanera Systems", "Silicon Packets",
+ "Viasystems Group", "Simtek", "Semicon Devices Singapore", "Satron Handelsges",
+ "Improv Systems", "INDUSYS GmbH", "Corrent", "Infrant Technologies",
+ "Ritek Corp", "empowerTel Networks", "Hypertec", "Cavium Networks",
+ "PLX Technology", "Massana Design", "Intrinsity", "Valence Semiconductor",
+ "Terawave Communications", "IceFyre Semiconductor", "Primarion", "Picochip Designs Ltd",
+ "Silverback Systems", "Jade Star Technologies", "Pijnenburg Securealink",
+ "TakeMS International AG", "Cambridge Silicon Radio",
+ "Swissbit", "Nazomi Communications", "eWave System",
+ "Rockwell Collins", "Picocel Co., Ltd.", "Alphamosaic Ltd", "Sandburst",
+ "SiCon Video", "NanoAmp Solutions", "Ericsson Technology", "PrairieComm",
+ "Mitac International", "Layer N Networks", "MtekVision", "Allegro Networks",
+ "Marvell Semiconductors", "Netergy Microelectronic", "NVIDIA", "Internet Machines",
+ "Peak Electronics", "Litchfield Communication", "Accton Technology", "Teradiant Networks",
+ "Europe Technologies", "Cortina Systems", "RAM Components", "Raqia Networks",
+ "ClearSpeed", "Matsushita Battery", "Xelerated", "SimpleTech",
+ "Utron Technology", "Astec International", "AVM gmbH", "Redux Communications",
+ "Dot Hill Systems", "TeraChip"],
+["T-RAM Incorporated", "Innovics Wireless", "Teknovus", "KeyEye Communications",
+ "Runcom Technologies", "RedSwitch", "Dotcast", "Silicon Mountain Memory",
+ "Signia Technologies", "Pixim", "Galazar Networks", "White Electronic Designs",
+ "Patriot Scientific", "Neoaxiom Corporation", "3Y Power Technology", "Europe Technologies",
+ "Potentia Power Systems", "C-guys Incorporated", "Digital Communications Technology Incorporated", "Silicon-Based Technology",
+ "Fulcrum Microsystems", "Positivo Informatica Ltd", "XIOtech Corporation", "PortalPlayer",
+ "Zhiying Software", "Direct2Data", "Phonex Broadband", "Skyworks Solutions",
+ "Entropic Communications", "Pacific Force Technology", "Zensys A/S", "Legend Silicon Corp.",
+ "sci-worx GmbH", "SMSC (former Oasis Silicon Systems)", "Renesas Technology", "Raza Microelectronics",
+ "Phyworks", "MediaTek", "Non-cents Productions", "US Modular",
+ "Wintegra Ltd", "Mathstar", "StarCore", "Oplus Technologies",
+ "Mindspeed", "Just Young Computer", "Radia Communications", "OCZ",
+ "Emuzed", "LOGIC Devices", "Inphi Corporation", "Quake Technologies",
+ "Vixel", "SolusTek", "Kongsberg Maritime", "Faraday Technology",
+ "Altium Ltd.", "Insyte", "ARM Ltd.", "DigiVision",
+ "Vativ Technologies", "Endicott Interconnect Technologies", "Pericom", "Bandspeed",
+ "LeWiz Communications", "CPU Technology", "Ramaxel Technology", "DSP Group",
+ "Axis Communications", "Legacy Electronics", "Chrontel", "Powerchip Semiconductor",
+ "MobilEye Technologies", "Excel Semiconductor", "A-DATA Technology", "VirtualDigm",
+ "G Skill Intl", "Quanta Computer", "Yield Microelectronics", "Afa Technologies",
+ "KINGBOX Technology Co. Ltd.", "Ceva", "iStor Networks", "Advance Modules",
+ "Microsoft", "Open-Silicon", "Goal Semiconductor", "ARC International",
+ "Simmtec", "Metanoia", "Key Stream", "Lowrance Electronics",
+ "Adimos", "SiGe Semiconductor", "Fodus Communications", "Credence Systems Corp.",
+ "Genesis Microchip Inc.", "Vihana, Inc.", "WIS Technologies", "GateChange Technologies",
+ "High Density Devices AS", "Synopsys", "Gigaram", "Enigma Semiconductor Inc.",
+ "Century Micro Inc.", "Icera Semiconductor", "Mediaworks Integrated Systems", "O'Neil Product Development",
+ "Supreme Top Technology Ltd.", "MicroDisplay Corporation", "Team Group Inc.", "Sinett Corporation",
+ "Toshiba Corporation", "Tensilica", "SiRF Technology", "Bacoc Inc.",
+ "SMaL Camera Technologies", "Thomson SC", "Airgo Networks", "Wisair Ltd.",
+ "SigmaTel", "Arkados", "Compete IT gmbH Co. KG", "Eudar Technology Inc.",
+ "Focus Enhancements", "Xyratex"],
+["Specular Networks", "Patriot Memory", "U-Chip Technology Corp.", "Silicon Optix",
+ "Greenfield Networks", "CompuRAM GmbH", "Stargen, Inc.", "NetCell Corporation",
+ "Excalibrus Technologies Ltd", "SCM Microsystems", "Xsigo Systems, Inc.", "CHIPS & Systems Inc",
+ "Tier 1 Multichip Solutions", "CWRL Labs", "Teradici", "Gigaram, Inc.",
+ "g2 Microsystems", "PowerFlash Semiconductor", "P.A. Semi, Inc.", "NovaTech Solutions, S.A.",
+ "c2 Microsystems, Inc.", "Level5 Networks", "COS Memory AG", "Innovasic Semiconductor",
+ "02IC Co. Ltd", "Tabula, Inc.", "Crucial Technology", "Chelsio Communications",
+ "Solarflare Communications", "Xambala Inc.", "EADS Astrium", "ATO Semicon Co. Ltd.",
+ "Imaging Works, Inc.", "Astute Networks, Inc.", "Tzero", "Emulex",
+ "Power-One", "Pulse~LINK Inc.", "Hon Hai Precision Industry", "White Rock Networks Inc.",
+ "Telegent Systems USA, Inc.", "Atrua Technologies, Inc.", "Acbel Polytech Inc.",
+ "eRide Inc.","ULi Electronics Inc.", "Magnum Semiconductor Inc.", "neoOne Technology, Inc.",
+ "Connex Technology, Inc.", "Stream Processors, Inc.", "Focus Enhancements", "Telecis Wireless, Inc.",
+ "uNav Microelectronics", "Tarari, Inc.", "Ambric, Inc.", "Newport Media, Inc.", "VMTS",
+ "Enuclia Semiconductor, Inc.", "Virtium Technology Inc.", "Solid State System Co., Ltd.", "Kian Tech LLC",
+ "Artimi", "Power Quotient International", "Avago Technologies", "ADTechnology", "Sigma Designs",
+ "SiCortex, Inc.", "Ventura Technology Group", "eASIC", "M.H.S. SAS", "Micro Star International",
+ "Rapport Inc.", "Makway International", "Broad Reach Engineering Co.",
+ "Semiconductor Mfg Intl Corp", "SiConnect", "FCI USA Inc.", "Validity Sensors",
+ "Coney Technology Co. Ltd.", "Spans Logic", "Neterion Inc.", "Qimonda",
+ "New Japan Radio Co. Ltd.", "Velogix", "Montalvo Systems", "iVivity Inc.", "Walton Chaintech",
+ "AENEON", "Lorom Industrial Co. Ltd.", "Radiospire Networks", "Sensio Technologies, Inc.",
+ "Nethra Imaging", "Hexon Technology Pte Ltd", "CompuStocx (CSX)", "Methode Electronics, Inc.",
+ "Connect One Ltd.", "Opulan Technologies", "Septentrio NV", "Goldenmars Technology Inc.",
+ "Kreton Corporation", "Cochlear Ltd.", "Altair Semiconductor", "NetEffect, Inc.",
+ "Spansion, Inc.", "Taiwan Semiconductor Mfg", "Emphany Systems Inc.",
+ "ApaceWave Technologies", "Mobilygen Corporation", "Tego", "Cswitch Corporation",
+ "Haier (Beijing) IC Design Co.", "MetaRAM", "Axel Electronics Co. Ltd.", "Tilera Corporation",
+ "Aquantia", "Vivace Semiconductor", "Redpine Signals", "Octalica", "InterDigital Communications",
+ "Avant Technology", "Asrock, Inc.", "Availink", "Quartics, Inc.", "Element CXI",
+ "Innovaciones Microelectronicas", "VeriSilicon Microelectronics", "W5 Networks"],
+["MOVEKING", "Mavrix Technology, Inc.", "CellGuide Ltd.", "Faraday Technology",
+ "Diablo Technologies, Inc.", "Jennic", "Octasic", "Molex Incorporated", "3Leaf Networks",
+ "Bright Micron Technology", "Netxen", "NextWave Broadband Inc.", "DisplayLink", "ZMOS Technology",
+ "Tec-Hill", "Multigig, Inc.", "Amimon", "Euphonic Technologies, Inc.", "BRN Phoenix",
+ "InSilica", "Ember Corporation", "Avexir Technologies Corporation", "Echelon Corporation",
+ "Edgewater Computer Systems", "XMOS Semiconductor Ltd.", "GENUSION, Inc.", "Memory Corp NV",
+ "SiliconBlue Technologies", "Rambus Inc."]);
+
+$use_sysfs = -d '/sys/bus';
+
+# We consider that no data was written to this area of the SPD EEPROM if
+# all bytes read 0x00 or all bytes read 0xff
+sub spd_written(@)
+{
+ my $all_00 = 1;
+ my $all_ff = 1;
+
+ foreach my $b (@_) {
+ $all_00 = 0 unless $b == 0x00;
+ $all_ff = 0 unless $b == 0xff;
+ return 1 unless $all_00 or $all_ff;
+ }
+
+ return 0;
+}
+
+sub parity($)
+{
+ my $n = shift;
+ my $parity = 0;
+
+ while ($n) {
+ $parity++ if ($n & 1);
+ $n >>= 1;
+ }
+
+ return ($parity & 1);
+}
+
+sub manufacturer(@)
+{
+ my @bytes = @_;
+ my $ai = 0;
+ my $first;
+
+ return ("Undefined", []) unless spd_written(@bytes);
+
+ while (defined($first = shift(@bytes)) && $first == 0x7F) {
+ $ai++;
+ }
+
+ return ("Invalid", []) unless defined $first;
+ return ("Invalid", [$first, @bytes]) if parity($first) != 1;
+ return ("Unknown", \@bytes) unless (($first & 0x7F) - 1 <= $vendors[$ai]);
+
+ return ($vendors[$ai][($first & 0x7F) - 1], \@bytes);
+}
+
+sub manufacturer_data(@)
+{
+ my $hex = "";
+ my $asc = "";
+
+ return unless spd_written(@_);
+
+ foreach my $byte (@_) {
+ $hex .= sprintf("\%02X ", $byte);
+ $asc .= ($byte >= 32 && $byte < 127) ? chr($byte) : '?';
+ }
+
+ return "$hex(\"$asc\")";
+}
+
+sub part_number(@)
+{
+ my $asc = "";
+ my $byte;
+
+ while (defined ($byte = shift) && $byte >= 32 && $byte < 127) {
+ $asc .= chr($byte);
+ }
+
+ return ($asc eq "") ? "Undefined" : $asc;
+}
+
+sub cas_latencies(@)
+{
+ return "None" unless @_;
+ return join ', ', map("${_}T", sort { $b <=> $a } @_);
+}
+
+sub printl($$) # print a line w/ label and value
+{
+ my ($label, $value) = @_;
+ if ($opt_html) {
+ $label =~ s/</\</sg;
+ $label =~ s/>/\>/sg;
+ $label =~ s/\n/<br>\n/sg;
+ $value =~ s/</\</sg;
+ $value =~ s/>/\>/sg;
+ $value =~ s/\n/<br>\n/sg;
+ print "<tr><td valign=top>$label</td><td>$value</td></tr>\n";
+ } else {
+ my @values = split /\n/, $value;
+ printf "%-47s %s\n", $label, shift @values;
+ printf "%-47s %s\n", "", $_ foreach (@values);
+ }
+}
+
+sub printl2($$) # print a line w/ label and value (outside a table)
+{
+ my ($label, $value) = @_;
+ if ($opt_html) {
+ $label =~ s/</\</sg;
+ $label =~ s/>/\>/sg;
+ $label =~ s/\n/<br>\n/sg;
+ $value =~ s/</\</sg;
+ $value =~ s/>/\>/sg;
+ $value =~ s/\n/<br>\n/sg;
+ }
+ print "$label: $value\n";
+}
+
+sub prints($) # print seperator w/ given text
+{
+ my ($label) = @_;
+ if ($opt_html) {
+ $label =~ s/</\</sg;
+ $label =~ s/>/\>/sg;
+ $label =~ s/\n/<br>\n/sg;
+ print "<tr><td align=center colspan=2><b>$label</b></td></tr>\n";
+ } else {
+ print "\n---=== $label ===---\n";
+ }
+}
+
+sub printh($$) # print header w/ given text
+{
+ my ($header, $sub) = @_;
+ if ($opt_html) {
+ $header =~ s/</\</sg;
+ $header =~ s/>/\>/sg;
+ $header =~ s/\n/<br>\n/sg;
+ $sub =~ s/</\</sg;
+ $sub =~ s/>/\>/sg;
+ $sub =~ s/\n/<br>\n/sg;
+ print "<h1>$header</h1>\n";
+ print "<p>$sub</p>\n";
+ } else {
+ print "\n$header\n$sub\n";
+ }
+}
+
+sub printc($) # print comment
+{
+ my ($comment) = @_;
+ if ($opt_html) {
+ $comment =~ s/</\</sg;
+ $comment =~ s/>/\>/sg;
+ $comment =~ s/\n/<br>\n/sg;
+ print "<!-- $comment -->\n";
+ } else {
+ print "# $comment\n";
+ }
+}
+
+sub tns($) # print a time in ns
+{
+ return sprintf("%3.2f ns", $_[0]);
+}
+
+# Parameter: bytes 0-63
+sub decode_sdr_sdram($)
+{
+ my $bytes = shift;
+ my ($l, $temp);
+
+# SPD revision
+ printl "SPD Revision", $bytes->[62];
+
+#size computation
+
+ prints "Memory Characteristics";
+
+ my $k = 0;
+ my $ii = 0;
+
+ $ii = ($bytes->[3] & 0x0f) + ($bytes->[4] & 0x0f) - 17;
+ if (($bytes->[5] <= 8) && ($bytes->[17] <= 8)) {
+ $k = $bytes->[5] * $bytes->[17];
+ }
+
+ if ($ii > 0 && $ii <= 12 && $k > 0) {
+ printl "Size", ((1 << $ii) * $k) . " MB";
+ } else {
+ printl "INVALID SIZE", $bytes->[3] . "," . $bytes->[4] . "," .
+ $bytes->[5] . "," . $bytes->[17];
+ }
+
+ my @cas;
+ for ($ii = 0; $ii < 7; $ii++) {
+ push(@cas, $ii + 1) if ($bytes->[18] & (1 << $ii));
+ }
+
+ my $trcd;
+ my $trp;
+ my $tras;
+ my $ctime = ($bytes->[9] >> 4) + ($bytes->[9] & 0xf) * 0.1;
+
+ $trcd = $bytes->[29];
+ $trp = $bytes->[27];;
+ $tras = $bytes->[30];
+
+ printl "tCL-tRCD-tRP-tRAS",
+ $cas[$#cas] . "-" .
+ ceil($trcd/$ctime) . "-" .
+ ceil($trp/$ctime) . "-" .
+ ceil($tras/$ctime);
+
+ $l = "Number of Row Address Bits";
+ if ($bytes->[3] == 0) { printl $l, "Undefined!"; }
+ elsif ($bytes->[3] == 1) { printl $l, "1/16"; }
+ elsif ($bytes->[3] == 2) { printl $l, "2/17"; }
+ elsif ($bytes->[3] == 3) { printl $l, "3/18"; }
+ else { printl $l, $bytes->[3]; }
+
+ $l = "Number of Col Address Bits";
+ if ($bytes->[4] == 0) { printl $l, "Undefined!"; }
+ elsif ($bytes->[4] == 1) { printl $l, "1/16"; }
+ elsif ($bytes->[4] == 2) { printl $l, "2/17"; }
+ elsif ($bytes->[4] == 3) { printl $l, "3/18"; }
+ else { printl $l, $bytes->[4]; }
+
+ $l = "Number of Module Rows";
+ if ($bytes->[5] == 0 ) { printl $l, "Undefined!"; }
+ else { printl $l, $bytes->[5]; }
+
+ $l = "Data Width";
+ if ($bytes->[7] > 1) {
+ printl $l, "Undefined!"
+ } else {
+ $temp = ($bytes->[7] * 256) + $bytes->[6];
+ printl $l, $temp;
+ }
+
+ $l = "Module Interface Signal Levels";
+ if ($bytes->[8] == 0) { printl $l, "5.0 Volt/TTL"; }
+ elsif ($bytes->[8] == 1) { printl $l, "LVTTL"; }
+ elsif ($bytes->[8] == 2) { printl $l, "HSTL 1.5"; }
+ elsif ($bytes->[8] == 3) { printl $l, "SSTL 3.3"; }
+ elsif ($bytes->[8] == 4) { printl $l, "SSTL 2.5"; }
+ elsif ($bytes->[8] == 255) { printl $l, "New Table"; }
+ else { printl $l, "Undefined!"; }
+
+ $l = "Module Configuration Type";
+ if ($bytes->[11] == 0) { printl $l, "No Parity"; }
+ elsif ($bytes->[11] == 1) { printl $l, "Parity"; }
+ elsif ($bytes->[11] == 2) { printl $l, "ECC"; }
+ else { printl $l, "Undefined!"; }
+
+ $l = "Refresh Type";
+ if ($bytes->[12] > 126) { printl $l, "Self Refreshing"; }
+ else { printl $l, "Not Self Refreshing"; }
+
+ $l = "Refresh Rate";
+ $temp = $bytes->[12] & 0x7f;
+ if ($temp == 0) { printl $l, "Normal (15.625 us)"; }
+ elsif ($temp == 1) { printl $l, "Reduced (3.9 us)"; }
+ elsif ($temp == 2) { printl $l, "Reduced (7.8 us)"; }
+ elsif ($temp == 3) { printl $l, "Extended (31.3 us)"; }
+ elsif ($temp == 4) { printl $l, "Extended (62.5 us)"; }
+ elsif ($temp == 5) { printl $l, "Extended (125 us)"; }
+ else { printl $l, "Undefined!"; }
+
+ $l = "Primary SDRAM Component Bank Config";
+ if ($bytes->[13] > 126) { printl $l, "Bank2 = 2 x Bank1"; }
+ else { printl $l, "No Bank2 OR Bank2 = Bank1 width"; }
+
+ $l = "Primary SDRAM Component Widths";
+ $temp = $bytes->[13] & 0x7f;
+ if ($temp == 0) { printl $l, "Undefined!\n"; }
+ else { printl $l, $temp; }
+
+ $l = "Error Checking SDRAM Component Bank Config";
+ if ($bytes->[14] > 126) { printl $l, "Bank2 = 2 x Bank1"; }
+ else { printl $l, "No Bank2 OR Bank2 = Bank1 width"; }
+
+ $l = "Error Checking SDRAM Component Widths";
+ $temp = $bytes->[14] & 0x7f;
+ if ($temp == 0) { printl $l, "Undefined!"; }
+ else { printl $l, $temp; }
+
+ $l = "Min Clock Delay for Back to Back Random Access";
+ if ($bytes->[15] == 0) { printl $l, "Undefined!"; }
+ else { printl $l, $bytes->[15]; }
+
+ $l = "Supported Burst Lengths";
+ my @array;
+ for ($ii = 0; $ii < 4; $ii++) {
+ push(@array, 1 << $ii) if ($bytes->[16] & (1 << $ii));
+ }
+ push(@array, "Page") if ($bytes->[16] & 128);
+ if (@array) { $temp = join ', ', @array; }
+ else { $temp = "None"; }
+ printl $l, $temp;
+
+ $l = "Number of Device Banks";
+ if ($bytes->[17] == 0) { printl $l, "Undefined/Reserved!"; }
+ else { printl $l, $bytes->[17]; }
+
+ $l = "Supported CAS Latencies";
+ printl $l, cas_latencies(@cas);
+
+ $l = "Supported CS Latencies";
+ @array = ();
+ for ($ii = 0; $ii < 7; $ii++) {
+ push(@array, $ii) if ($bytes->[19] & (1 << $ii));
+ }
+ if (@array) { $temp = join ', ', @array; }
+ else { $temp = "None"; }
+ printl $l, $temp;
+
+ $l = "Supported WE Latencies";
+ @array = ();
+ for ($ii = 0; $ii < 7; $ii++) {
+ push(@array, $ii) if ($bytes->[20] & (1 << $ii));
+ }
+ if (@array) { $temp = join ', ', @array; }
+ else { $temp = "None"; }
+ printl $l, $temp;
+
+ if (@cas >= 1) {
+ $l = "Cycle Time at CAS ".$cas[$#cas];
+ printl $l, "$ctime ns";
+
+ $l = "Access Time at CAS ".$cas[$#cas];
+ $temp = ($bytes->[10] >> 4) + ($bytes->[10] & 0xf) * 0.1;
+ printl $l, "$temp ns";
+ }
+
+ if (@cas >= 2 && spd_written(@$bytes[23..24])) {
+ $l = "Cycle Time at CAS ".$cas[$#cas-1];
+ $temp = $bytes->[23] >> 4;
+ if ($temp == 0) { printl $l, "Undefined!"; }
+ else {
+ if ($temp < 4 ) { $temp += 15; }
+ printl $l, $temp + (($bytes->[23] & 0xf) * 0.1) . " ns";
+ }
+
+ $l = "Access Time at CAS ".$cas[$#cas-1];
+ $temp = $bytes->[24] >> 4;
+ if ($temp == 0) { printl $l, "Undefined!"; }
+ else {
+ if ($temp < 4 ) { $temp += 15; }
+ printl $l, $temp + (($bytes->[24] & 0xf) * 0.1) . " ns";
+ }
+ }
+
+ if (@cas >= 3 && spd_written(@$bytes[25..26])) {
+ $l = "Cycle Time at CAS ".$cas[$#cas-2];
+ $temp = $bytes->[25] >> 2;
+ if ($temp == 0) { printl $l, "Undefined!"; }
+ else { printl $l, $temp + ($bytes->[25] & 0x3) * 0.25 . " ns"; }
+
+ $l = "Access Time at CAS ".$cas[$#cas-2];
+ $temp = $bytes->[26] >> 2;
+ if ($temp == 0) { printl $l, "Undefined!"; }
+ else { printl $l, $temp + ($bytes->[26] & 0x3) * 0.25 . " ns"; }
+ }
+
+ $l = "SDRAM Module Attributes";
+ $temp = "";
+ if ($bytes->[21] & 1) { $temp .= "Buffered Address/Control Inputs\n"; }
+ if ($bytes->[21] & 2) { $temp .= "Registered Address/Control Inputs\n"; }
+ if ($bytes->[21] & 4) { $temp .= "On card PLL (clock)\n"; }
+ if ($bytes->[21] & 8) { $temp .= "Buffered DQMB Inputs\n"; }
+ if ($bytes->[21] & 16) { $temp .= "Registered DQMB Inputs\n"; }
+ if ($bytes->[21] & 32) { $temp .= "Differential Clock Input\n"; }
+ if ($bytes->[21] & 64) { $temp .= "Redundant Row Address\n"; }
+ if ($bytes->[21] & 128) { $temp .= "Undefined (bit 7)\n"; }
+ if ($bytes->[21] == 0) { $temp .= "(None Reported)\n"; }
+ printl $l, $temp;
+
+ $l = "SDRAM Device Attributes (General)";
+ $temp = "";
+ if ($bytes->[22] & 1) { $temp .= "Supports Early RAS# Recharge\n"; }
+ if ($bytes->[22] & 2) { $temp .= "Supports Auto-Precharge\n"; }
+ if ($bytes->[22] & 4) { $temp .= "Supports Precharge All\n"; }
+ if ($bytes->[22] & 8) { $temp .= "Supports Write1/Read Burst\n"; }
+ if ($bytes->[22] & 16) { $temp .= "Lower VCC Tolerance: 5%\n"; }
+ else { $temp .= "Lower VCC Tolerance: 10%\n"; }
+ if ($bytes->[22] & 32) { $temp .= "Upper VCC Tolerance: 5%\n"; }
+ else { $temp .= "Upper VCC Tolerance: 10%\n"; }
+ if ($bytes->[22] & 64) { $temp .= "Undefined (bit 6)\n"; }
+ if ($bytes->[22] & 128) { $temp .= "Undefined (bit 7)\n"; }
+ printl $l, $temp;
+
+ $l = "Minimum Row Precharge Time";
+ if ($bytes->[27] == 0) { printl $l, "Undefined!"; }
+ else { printl $l, "$bytes->[27] ns"; }
+
+ $l = "Row Active to Row Active Min";
+ if ($bytes->[28] == 0) { printl $l, "Undefined!"; }
+ else { printl $l, "$bytes->[28] ns"; }
+
+ $l = "RAS to CAS Delay";
+ if ($bytes->[29] == 0) { printl $l, "Undefined!"; }
+ else { printl $l, "$bytes->[29] ns"; }
+
+ $l = "Min RAS Pulse Width";
+ if ($bytes->[30] == 0) { printl $l, "Undefined!"; }
+ else { printl $l, "$bytes->[30] ns"; }
+
+ $l = "Row Densities";
+ $temp = "";
+ if ($bytes->[31] & 1) { $temp .= "4 MByte\n"; }
+ if ($bytes->[31] & 2) { $temp .= "8 MByte\n"; }
+ if ($bytes->[31] & 4) { $temp .= "16 MByte\n"; }
+ if ($bytes->[31] & 8) { $temp .= "32 MByte\n"; }
+ if ($bytes->[31] & 16) { $temp .= "64 MByte\n"; }
+ if ($bytes->[31] & 32) { $temp .= "128 MByte\n"; }
+ if ($bytes->[31] & 64) { $temp .= "256 MByte\n"; }
+ if ($bytes->[31] & 128) { $temp .= "512 MByte\n"; }
+ if ($bytes->[31] == 0) { $temp .= "(Undefined! -- None Reported!)\n"; }
+ printl $l, $temp;
+
+ if (($bytes->[32] & 0xf) <= 9) {
+ $l = "Command and Address Signal Setup Time";
+ $temp = (($bytes->[32] & 0x7f) >> 4) + ($bytes->[32] & 0xf) * 0.1;
+ printl $l, (($bytes->[32] >> 7) ? -$temp : $temp) . " ns";
+ }
+
+ if (($bytes->[33] & 0xf) <= 9) {
+ $l = "Command and Address Signal Hold Time";
+ $temp = (($bytes->[33] & 0x7f) >> 4) + ($bytes->[33] & 0xf) * 0.1;
+ printl $l, (($bytes->[33] >> 7) ? -$temp : $temp) . " ns";
+ }
+
+ if (($bytes->[34] & 0xf) <= 9) {
+ $l = "Data Signal Setup Time";
+ $temp = (($bytes->[34] & 0x7f) >> 4) + ($bytes->[34] & 0xf) * 0.1;
+ printl $l, (($bytes->[34] >> 7) ? -$temp : $temp) . " ns";
+ }
+
+ if (($bytes->[35] & 0xf) <= 9) {
+ $l = "Data Signal Hold Time";
+ $temp = (($bytes->[35] & 0x7f) >> 4) + ($bytes->[35] & 0xf) * 0.1;
+ printl $l, (($bytes->[35] >> 7) ? -$temp : $temp) . " ns";
+ }
+}
+
+# Parameter: bytes 0-63
+sub decode_ddr_sdram($)
+{
+ my $bytes = shift;
+ my ($l, $temp);
+
+# SPD revision
+ if ($bytes->[62] != 0xff) {
+ printl "SPD Revision", ($bytes->[62] >> 4) . "." .
+ ($bytes->[62] & 0xf);
+ }
+
+# speed
+ prints "Memory Characteristics";
+
+ $l = "Maximum module speed";
+ $temp = ($bytes->[9] >> 4) + ($bytes->[9] & 0xf) * 0.1;
+ my $ddrclk = 2 * (1000 / $temp);
+ my $tbits = ($bytes->[7] * 256) + $bytes->[6];
+ if (($bytes->[11] == 2) || ($bytes->[11] == 1)) { $tbits = $tbits - 8; }
+ my $pcclk = int ($ddrclk * $tbits / 8);
+ $pcclk += 100 if ($pcclk % 100) >= 50; # Round properly
+ $pcclk = $pcclk - ($pcclk % 100);
+ $ddrclk = int ($ddrclk);
+ printl $l, "${ddrclk}MHz (PC${pcclk})";
+
+#size computation
+ my $k = 0;
+ my $ii = 0;
+
+ $ii = ($bytes->[3] & 0x0f) + ($bytes->[4] & 0x0f) - 17;
+ if (($bytes->[5] <= 8) && ($bytes->[17] <= 8)) {
+ $k = $bytes->[5] * $bytes->[17];
+ }
+
+ if ($ii > 0 && $ii <= 12 && $k > 0) {
+ printl "Size", ((1 << $ii) * $k) . " MB";
+ } else {
+ printl "INVALID SIZE", $bytes->[3] . ", " . $bytes->[4] . ", " .
+ $bytes->[5] . ", " . $bytes->[17];
+ }
+
+ my $highestCAS = 0;
+ my %cas;
+ for ($ii = 0; $ii < 7; $ii++) {
+ if ($bytes->[18] & (1 << $ii)) {
+ $highestCAS = 1+$ii*0.5;
+ $cas{$highestCAS}++;
+ }
+ }
+
+ my $trcd;
+ my $trp;
+ my $tras;
+ my $ctime = ($bytes->[9] >> 4) + ($bytes->[9] & 0xf) * 0.1;
+
+ $trcd = ($bytes->[29] >> 2) + (($bytes->[29] & 3) * 0.25);
+ $trp = ($bytes->[27] >> 2) + (($bytes->[27] & 3) * 0.25);
+ $tras = $bytes->[30];
+
+ printl "tCL-tRCD-tRP-tRAS",
+ $highestCAS . "-" .
+ ceil($trcd/$ctime) . "-" .
+ ceil($trp/$ctime) . "-" .
+ ceil($tras/$ctime);
+
+# latencies
+ printl "Supported CAS Latencies", cas_latencies(keys %cas);
+
+ my @array;
+ for ($ii = 0; $ii < 7; $ii++) {
+ push(@array, $ii) if ($bytes->[19] & (1 << $ii));
+ }
+ if (@array) { $temp = join ', ', @array; }
+ else { $temp = "None"; }
+ printl "Supported CS Latencies", $temp;
+
+ @array = ();
+ for ($ii = 0; $ii < 7; $ii++) {
+ push(@array, $ii) if ($bytes->[20] & (1 << $ii));
+ }
+ if (@array) { $temp = join ', ', @array; }
+ else { $temp = "None"; }
+ printl "Supported WE Latencies", $temp;
+
+# timings
+ if (exists $cas{$highestCAS}) {
+ printl "Minimum Cycle Time at CAS $highestCAS",
+ "$ctime ns";
+
+ printl "Maximum Access Time at CAS $highestCAS",
+ (($bytes->[10] >> 4) * 0.1 + ($bytes->[10] & 0xf) * 0.01) . " ns";
+ }
+
+ if (exists $cas{$highestCAS-0.5} && spd_written(@$bytes[23..24])) {
+ printl "Minimum Cycle Time at CAS ".($highestCAS-0.5),
+ (($bytes->[23] >> 4) + ($bytes->[23] & 0xf) * 0.1) . " ns";
+
+ printl "Maximum Access Time at CAS ".($highestCAS-0.5),
+ (($bytes->[24] >> 4) * 0.1 + ($bytes->[24] & 0xf) * 0.01) . " ns";
+ }
+
+ if (exists $cas{$highestCAS-1} && spd_written(@$bytes[25..26])) {
+ printl "Minimum Cycle Time at CAS ".($highestCAS-1),
+ (($bytes->[25] >> 4) + ($bytes->[25] & 0xf) * 0.1) . " ns";
+
+ printl "Maximum Access Time at CAS ".($highestCAS-1),
+ (($bytes->[26] >> 4) * 0.1 + ($bytes->[26] & 0xf) * 0.01) . " ns";
+ }
+
+# module attributes
+ if ($bytes->[47] & 0x03) {
+ if (($bytes->[47] & 0x03) == 0x01) { $temp = "1.125\" to 1.25\""; }
+ elsif (($bytes->[47] & 0x03) == 0x02) { $temp = "1.7\""; }
+ elsif (($bytes->[47] & 0x03) == 0x03) { $temp = "Other"; }
+ printl "Module Height", $temp;
+ }
+}
+
+sub ddr2_sdram_ctime($)
+{
+ my $byte = shift;
+ my $ctime;
+
+ $ctime = $byte >> 4;
+ if (($byte & 0xf) <= 9) { $ctime += ($byte & 0xf) * 0.1; }
+ elsif (($byte & 0xf) == 10) { $ctime += 0.25; }
+ elsif (($byte & 0xf) == 11) { $ctime += 0.33; }
+ elsif (($byte & 0xf) == 12) { $ctime += 0.66; }
+ elsif (($byte & 0xf) == 13) { $ctime += 0.75; }
+
+ return $ctime;
+}
+
+sub ddr2_sdram_atime($)
+{
+ my $byte = shift;
+ my $atime;
+
+ $atime = ($byte >> 4) * 0.1 + ($byte & 0xf) * 0.01;
+
+ return $atime;
+}
+
+# Base, high-bit, 3-bit fraction code
+sub ddr2_sdram_rtime($$$)
+{
+ my ($rtime, $msb, $ext) = @_;
+ my @table = (0, .25, .33, .50, .66, .75);
+
+ return $rtime + $msb * 256 + $table[$ext];
+}
+
+sub ddr2_module_types($)
+{
+ my $byte = shift;
+ my @types = qw(RDIMM UDIMM SO-DIMM Micro-DIMM Mini-RDIMM Mini-UDIMM);
+ my @widths = (133.35, 133.25, 67.6, 45.5, 82.0, 82.0);
+ my @suptypes;
+ local $_;
+
+ foreach (0..5) {
+ push @suptypes, "$types[$_] ($widths[$_] mm)"
+ if ($byte & (1 << $_));
+ }
+
+ return @suptypes;
+}
+
+sub ddr2_refresh_rate($)
+{
+ my $byte = shift;
+ my @refresh = qw(Normal Reduced Reduced Extended Extended Extended);
+ my @refresht = (15.625, 3.9, 7.8, 31.3, 62.5, 125);
+
+ return "$refresh[$byte & 0x7f] ($refresht[$byte & 0x7f] us)".
+ ($byte & 0x80 ? " - Self Refresh" : "");
+}
+
+# Parameter: bytes 0-63
+sub decode_ddr2_sdram($)
+{
+ my $bytes = shift;
+ my ($l, $temp);
+ my $ctime;
+
+# SPD revision
+ if ($bytes->[62] != 0xff) {
+ printl "SPD Revision", ($bytes->[62] >> 4) . "." .
+ ($bytes->[62] & 0xf);
+ }
+
+# speed
+ prints "Memory Characteristics";
+
+ $l = "Maximum module speed";
+ $ctime = ddr2_sdram_ctime($bytes->[9]);
+ my $ddrclk = 2 * (1000 / $ctime);
+ my $tbits = ($bytes->[7] * 256) + $bytes->[6];
+ if ($bytes->[11] & 0x03) { $tbits = $tbits - 8; }
+ my $pcclk = int ($ddrclk * $tbits / 8);
+ # Round down to comply with Jedec
+ $pcclk = $pcclk - ($pcclk % 100);
+ $ddrclk = int ($ddrclk);
+ printl $l, "${ddrclk}MHz (PC2-${pcclk})";
+
+#size computation
+ my $k = 0;
+ my $ii = 0;
+
+ $ii = ($bytes->[3] & 0x0f) + ($bytes->[4] & 0x0f) - 17;
+ $k = (($bytes->[5] & 0x7) + 1) * $bytes->[17];
+
+ if($ii > 0 && $ii <= 12 && $k > 0) {
+ printl "Size", ((1 << $ii) * $k) . " MB";
+ } else {
+ printl "INVALID SIZE", $bytes->[3] . "," . $bytes->[4] . "," .
+ $bytes->[5] . "," . $bytes->[17];
+ }
+
+ printl "Banks x Rows x Columns x Bits",
+ join(' x ', $bytes->[17], $bytes->[3], $bytes->[4], $bytes->[6]);
+ printl "Ranks", ($bytes->[5] & 7) + 1;
+
+ printl "SDRAM Device Width", $bytes->[13]." bits";
+
+ my @heights = ('< 25.4', '25.4', '25.4 - 30.0', '30.0', '30.5', '> 30.5');
+ printl "Module Height", $heights[$bytes->[5] >> 5]." mm";
+
+ my @suptypes = ddr2_module_types($bytes->[20]);
+ printl "Module Type".(@suptypes > 1 ? 's' : ''), join(', ', @suptypes);
+
+ printl "DRAM Package", $bytes->[5] & 0x10 ? "Stack" : "Planar";
+
+ my @volts = ("TTL (5V Tolerant)", "LVTTL", "HSTL 1.5V",
+ "SSTL 3.3V", "SSTL 2.5V", "SSTL 1.8V", "TBD");
+ printl "Voltage Interface Level", $volts[$bytes->[8]];
+
+ printl "Refresh Rate", ddr2_refresh_rate($bytes->[12]);
+
+ my @burst;
+ push @burst, 4 if ($bytes->[16] & 4);
+ push @burst, 8 if ($bytes->[16] & 8);
+ $burst[0] = 'None' if !@burst;
+ printl "Supported Burst Lengths", join(', ', @burst);
+
+ my $highestCAS = 0;
+ my %cas;
+ for ($ii = 2; $ii < 7; $ii++) {
+ if ($bytes->[18] & (1 << $ii)) {
+ $highestCAS = $ii;
+ $cas{$highestCAS}++;
+ }
+ }
+
+ my $trcd;
+ my $trp;
+ my $tras;
+
+ $trcd = ($bytes->[29] >> 2) + (($bytes->[29] & 3) * 0.25);
+ $trp = ($bytes->[27] >> 2) + (($bytes->[27] & 3) * 0.25);
+ $tras = $bytes->[30];
+
+ printl "tCL-tRCD-tRP-tRAS",
+ $highestCAS . "-" .
+ ceil($trcd/$ctime) . "-" .
+ ceil($trp/$ctime) . "-" .
+ ceil($tras/$ctime);
+
+# latencies
+ printl "Supported CAS Latencies (tCL)", cas_latencies(keys %cas);
+
+# timings
+ if (exists $cas{$highestCAS}) {
+ printl "Minimum Cycle Time at CAS $highestCAS (tCK min)",
+ tns($ctime);
+ printl "Maximum Access Time at CAS $highestCAS (tAC)",
+ tns(ddr2_sdram_atime($bytes->[10]));
+ }
+
+ if (exists $cas{$highestCAS-1} && spd_written(@$bytes[23..24])) {
+ printl "Minimum Cycle Time at CAS ".($highestCAS-1),
+ tns(ddr2_sdram_ctime($bytes->[23]));
+ printl "Maximum Access Time at CAS ".($highestCAS-1),
+ tns(ddr2_sdram_atime($bytes->[24]));
+ }
+
+ if (exists $cas{$highestCAS-2} && spd_written(@$bytes[25..26])) {
+ printl "Minimum Cycle Time at CAS ".($highestCAS-2),
+ tns(ddr2_sdram_ctime($bytes->[25]));
+ printl "Maximum Access Time at CAS ".($highestCAS-2),
+ tns(ddr2_sdram_atime($bytes->[26]));
+ }
+ printl "Maximum Cycle Time (tCK max)",
+ tns(ddr2_sdram_ctime($bytes->[43]));
+
+# more timing information
+ prints("Timing Parameters");
+ printl "Address/Command Setup Time Before Clock (tIS)",
+ tns(ddr2_sdram_atime($bytes->[32]));
+ printl "Address/Command Hold Time After Clock (tIH)",
+ tns(ddr2_sdram_atime($bytes->[33]));
+ printl "Data Input Setup Time Before Strobe (tDS)",
+ tns(ddr2_sdram_atime($bytes->[34]));
+ printl "Data Input Hold Time After Strobe (tDH)",
+ tns(ddr2_sdram_atime($bytes->[35]));
+ printl "Minimum Row Precharge Delay (tRP)", tns($trp);
+ printl "Minimum Row Active to Row Active Delay (tRRD)",
+ tns($bytes->[28]/4);
+ printl "Minimum RAS# to CAS# Delay (tRCD)", tns($trcd);
+ printl "Minimum RAS# Pulse Width (tRAS)", tns($tras);
+ printl "Write Recovery Time (tWR)", tns($bytes->[36]/4);
+ printl "Minimum Write to Read CMD Delay (tWTR)", tns($bytes->[37]/4);
+ printl "Minimum Read to Pre-charge CMD Delay (tRTP)", tns($bytes->[38]/4);
+ printl "Minimum Active to Auto-refresh Delay (tRC)",
+ tns(ddr2_sdram_rtime($bytes->[41], 0, ($bytes->[40] >> 4) & 7));
+ printl "Minimum Recovery Delay (tRFC)",
+ tns(ddr2_sdram_rtime($bytes->[42], $bytes->[40] & 1,
+ ($bytes->[40] >> 1) & 7));
+ printl "Maximum DQS to DQ Skew (tDQSQ)", tns($bytes->[44]/100);
+ printl "Maximum Read Data Hold Skew (tQHS)", tns($bytes->[45]/100);
+ printl "PLL Relock Time", $bytes->[46] . " us" if ($bytes->[46]);
+}
+
+# Parameter: bytes 0-63
+sub decode_direct_rambus($)
+{
+ my $bytes = shift;
+
+#size computation
+ prints "Memory Characteristics";
+
+ my $ii;
+
+ $ii = ($bytes->[4] & 0x0f) + ($bytes->[4] >> 4) + ($bytes->[5] & 0x07) - 13;
+
+ if ($ii > 0 && $ii < 16) {
+ printl "Size", (1 << $ii) . " MB";
+ } else {
+ printl "INVALID SIZE", sprintf("0x%02x, 0x%02x",
+ $bytes->[4], $bytes->[5]);
+ }
+}
+
+# Parameter: bytes 0-63
+sub decode_rambus($)
+{
+ my $bytes = shift;
+
+#size computation
+ prints "Memory Characteristics";
+
+ my $ii;
+
+ $ii = ($bytes->[3] & 0x0f) + ($bytes->[3] >> 4) + ($bytes->[5] & 0x07) - 13;
+
+ if ($ii > 0 && $ii < 16) {
+ printl "Size", (1 << $ii) . " MB";
+ } else {
+ printl "INVALID SIZE", sprintf("0x%02x, 0x%02x",
+ $bytes->[3], $bytes->[5]);
+ }
+}
+
+%decode_callback = (
+ "SDR SDRAM" => \&decode_sdr_sdram,
+ "DDR SDRAM" => \&decode_ddr_sdram,
+ "DDR2 SDRAM" => \&decode_ddr2_sdram,
+ "Direct Rambus" => \&decode_direct_rambus,
+ "Rambus" => \&decode_rambus,
+);
+
+# Parameter: bytes 64-127
+sub decode_intel_spec_freq($)
+{
+ my $bytes = shift;
+ my ($l, $temp);
+
+ prints "Intel Specification";
+
+ $l = "Frequency";
+ if ($bytes->[62] == 0x66) { $temp = "66MHz\n"; }
+ elsif ($bytes->[62] == 100) { $temp = "100MHz or 133MHz\n"; }
+ elsif ($bytes->[62] == 133) { $temp = "133MHz\n"; }
+ else { $temp = "Undefined!\n"; }
+ printl $l, $temp;
+
+ $l = "Details for 100MHz Support";
+ $temp = "";
+ if ($bytes->[63] & 1) { $temp .= "Intel Concurrent Auto-precharge\n"; }
+ if ($bytes->[63] & 2) { $temp .= "CAS Latency = 2\n"; }
+ if ($bytes->[63] & 4) { $temp .= "CAS Latency = 3\n"; }
+ if ($bytes->[63] & 8) { $temp .= "Junction Temp A (100 degrees C)\n"; }
+ else { $temp .= "Junction Temp B (90 degrees C)\n"; }
+ if ($bytes->[63] & 16) { $temp .= "CLK 3 Connected\n"; }
+ if ($bytes->[63] & 32) { $temp .= "CLK 2 Connected\n"; }
+ if ($bytes->[63] & 64) { $temp .= "CLK 1 Connected\n"; }
+ if ($bytes->[63] & 128) { $temp .= "CLK 0 Connected\n"; }
+ if (($bytes->[63] & 192) == 192) { $temp .= "Double-sided DIMM\n"; }
+ elsif (($bytes->[63] & 192) != 0) { $temp .= "Single-sided DIMM\n"; }
+ printl $l, $temp;
+}
+
+# Read various hex dump style formats: hexdump, hexdump -C, i2cdump, eeprog
+# note that normal 'hexdump' format on a little-endian system byte-swaps
+# words, using hexdump -C is better.
+sub read_hexdump($)
+{
+ my $addr = 0;
+ my $repstart = 0;
+ my @bytes;
+ my $header = 1;
+ my $word = 0;
+
+ # Look in the cache first
+ return @{$hexdump_cache{$_[0]}} if exists $hexdump_cache{$_[0]};
+
+ open F, '<', $_[0] or die "Unable to open: $_[0]";
+ while (<F>) {
+ chomp;
+ if (/^\*$/) {
+ $repstart = $addr;
+ next;
+ }
+ /^(?:0000 )?([a-f\d]{2,8}):?\s+((:?[a-f\d]{4}\s*){8}|(:?[a-f\d]{2}\s*){16})/i ||
+ /^(?:0000 )?([a-f\d]{2,8}):?\s*$/i;
+ next if (!defined $1 && $header); # skip leading unparsed lines
+
+ defined $1 or die "Unable to parse input";
+ $header = 0;
+
+ $addr = hex $1;
+ if ($repstart) {
+ @bytes[$repstart .. ($addr-1)] =
+ (@bytes[($repstart-16)..($repstart-1)]) x (($addr-$repstart)/16);
+ $repstart = 0;
+ }
+ last unless defined $2;
+ foreach (split(/\s+/, $2)) {
+ if (/^(..)(..)$/) {
+ $word |= 1;
+ if ($use_hexdump eq LITTLEENDIAN) {
+ $bytes[$addr++] = hex($2);
+ $bytes[$addr++] = hex($1);
+ } else {
+ $bytes[$addr++] = hex($1);
+ $bytes[$addr++] = hex($2);
+ }
+ } else {
+ $bytes[$addr++] = hex($_);
+ }
+ }
+ }
+ close F;
+ $header and die "Unable to parse any data from hexdump '$_[0]'";
+ $word and printc "Using $use_hexdump 16-bit hex dump";
+
+ # Cache the data for later use
+ $hexdump_cache{$_[0]} = \@bytes;
+ return @bytes;
+}
+
+sub readspd64($$) # reads 64 bytes from SPD-EEPROM
+{
+ my ($offset, $dimm_i) = @_;
+ my @bytes;
+ if ($use_hexdump) {
+ @bytes = read_hexdump($dimm_i);
+ return @bytes[$offset..($offset+63)];
+ } elsif ($use_sysfs) {
+ # Kernel 2.6 with sysfs
+ sysopen(HANDLE, "/sys/bus/i2c/drivers/eeprom/$dimm_i/eeprom", O_RDONLY)
+ or die "Cannot open /sys/bus/i2c/drivers/eeprom/$dimm_i/eeprom";
+ binmode HANDLE;
+ sysseek(HANDLE, $offset, SEEK_SET);
+ sysread(HANDLE, my $eeprom, 64);
+ close HANDLE;
+ @bytes = unpack("C64", $eeprom);
+ } else {
+ # Kernel 2.4 with procfs
+ for my $i (0 .. 3) {
+ my $hexoff = sprintf('%02x', $offset + $i * 16);
+ push @bytes, split(" ", `cat /proc/sys/dev/sensors/$dimm_i/$hexoff`);
+ }
+ }
+ return @bytes;
+}
+
+# Parse command-line
+foreach (@ARGV) {
+ if ($_ eq '-h' || $_ eq '--help') {
+ print "Usage: $0 [-c] [-f [-b]] [-x|-X file [files..]]\n",
+ " $0 -h\n\n",
+ " -f, --format Print nice html output\n",
+ " -b, --bodyonly Don't print html header\n",
+ " (useful for postprocessing the output)\n",
+ " -c, --checksum Decode completely even if checksum fails\n",
+ " -x, Read data from hexdump files\n",
+ " -X, Same as -x except treat multibyte hex\n",
+ " data as little endian\n",
+ " -h, --help Display this usage summary\n";
+ print <<"EOF";
+
+Hexdumps can be the output from hexdump, hexdump -C, i2cdump, eeprog and
+likely many other progams producing hex dumps of one kind or another. Note
+that the default output of "hexdump" will be byte-swapped on little-endian
+systems and you must use -X instead of -x, otherwise the dump will not be
+parsed correctly. It is better to use "hexdump -C", which is not ambiguous.
+EOF
+ exit;
+ }
+
+ if ($_ eq '-f' || $_ eq '--format') {
+ $opt_html = 1;
+ next;
+ }
+ if ($_ eq '-b' || $_ eq '--bodyonly') {
+ $opt_bodyonly = 1;
+ next;
+ }
+ if ($_ eq '-c' || $_ eq '--checksum') {
+ $opt_igncheck = 1;
+ next;
+ }
+ if ($_ eq '-x') {
+ $use_hexdump = BIGENDIAN;
+ next;
+ }
+ if ($_ eq '-X') {
+ $use_hexdump = LITTLEENDIAN;
+ next;
+ }
+
+ if (m/^-/) {
+ print STDERR "Unrecognized option $_\n";
+ exit;
+ }
+
+ push @dimm_list, $_ if $use_hexdump;
+}
+
+if ($opt_html && !$opt_bodyonly) {
+ print "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 3.2 Final//EN\">\n",
+ "<html><head>\n",
+ "\t<meta HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=iso-8859-1\">\n",
+ "\t<title>PC DIMM Serial Presence Detect Tester/Decoder Output</title>\n",
+ "</head><body>\n";
+}
+
+printc "decode-dimms version $revision";
+printh 'Memory Serial Presence Detect Decoder',
+'By Philip Edelbrock, Christian Zuckschwerdt, Burkart Lingner,
+Jean Delvare, Trent Piepho and others';
+
+
+my $dimm_count = 0;
+my $dir;
+if (!$use_hexdump) {
+ if ($use_sysfs) { $dir = '/sys/bus/i2c/drivers/eeprom'; }
+ else { $dir = '/proc/sys/dev/sensors'; }
+ if (-d $dir) {
+ @dimm_list = split(/\s+/, `ls $dir`);
+ } elsif (! -d '/sys/module/eeprom') {
+ print "No EEPROM found, are you sure the eeprom module is loaded?\n";
+ exit;
+ }
+}
+
+for my $i ( 0 .. $#dimm_list ) {
+ $_ = $dimm_list[$i];
+ if (($use_sysfs && /^\d+-\d+$/)
+ || (!$use_sysfs && /^eeprom-/)
+ || $use_hexdump) {
+ my @bytes = readspd64(0, $dimm_list[$i]);
+ my $dimm_checksum = 0;
+ $dimm_checksum += $bytes[$_] foreach (0 .. 62);
+ $dimm_checksum &= 0xff;
+
+ next unless $bytes[63] == $dimm_checksum || $opt_igncheck;
+ $dimm_count++;
+
+ print "<b><u>" if $opt_html;
+ printl2 "\n\nDecoding EEPROM",
+ $use_hexdump ? $dimm_list[$i] : ($use_sysfs ?
+ "/sys/bus/i2c/drivers/eeprom/$dimm_list[$i]" :
+ "/proc/sys/dev/sensors/$dimm_list[$i]");
+ print "</u></b>" if $opt_html;
+ print "<table border=1>\n" if $opt_html;
+ if (!$use_hexdump) {
+ if (($use_sysfs && /^[^-]+-([^-]+)$/)
+ || (!$use_sysfs && /^[^-]+-[^-]+-[^-]+-([^-]+)$/)) {
+ my $dimm_num = $1 - 49;
+ printl "Guessing DIMM is in", "bank $dimm_num";
+ }
+ }
+
+# Decode first 3 bytes (0-2)
+ prints "SPD EEPROM Information";
+
+ my $l = "EEPROM Checksum of bytes 0-62";
+ printl $l, ($bytes[63] == $dimm_checksum ?
+ sprintf("OK (0x%.2X)", $bytes[63]):
+ sprintf("Bad\n(found 0x%.2X, calculated 0x%.2X)\n",
+ $bytes[63], $dimm_checksum));
+
+ # Simple heuristic to detect Rambus
+ my $is_rambus = $bytes[0] < 4;
+ my $temp;
+ if ($is_rambus) {
+ if ($bytes[0] == 1) { $temp = "0.7"; }
+ elsif ($bytes[0] == 2) { $temp = "1.0"; }
+ elsif ($bytes[0] == 0 || $bytes[0] == 255) { $temp = "Invalid"; }
+ else { $temp = "Reserved"; }
+ printl "SPD Revision", $temp;
+ } else {
+ printl "# of bytes written to SDRAM EEPROM",
+ $bytes[0];
+ }
+
+ $l = "Total number of bytes in EEPROM";
+ if ($bytes[1] <= 14) {
+ printl $l, 2**$bytes[1];
+ } elsif ($bytes[1] == 0) {
+ printl $l, "RFU";
+ } else { printl $l, "ERROR!"; }
+
+ $l = "Fundamental Memory type";
+ my $type = "Unknown";
+ if ($is_rambus) {
+ if ($bytes[2] == 1) { $type = "Direct Rambus"; }
+ elsif ($bytes[2] == 17) { $type = "Rambus"; }
+ } else {
+ if ($bytes[2] == 1) { $type = "FPM DRAM"; }
+ elsif ($bytes[2] == 2) { $type = "EDO"; }
+ elsif ($bytes[2] == 3) { $type = "Pipelined Nibble"; }
+ elsif ($bytes[2] == 4) { $type = "SDR SDRAM"; }
+ elsif ($bytes[2] == 5) { $type = "Multiplexed ROM"; }
+ elsif ($bytes[2] == 6) { $type = "DDR SGRAM"; }
+ elsif ($bytes[2] == 7) { $type = "DDR SDRAM"; }
+ elsif ($bytes[2] == 8) { $type = "DDR2 SDRAM"; }
+ }
+ printl $l, $type;
+
+# Decode next 61 bytes (3-63, depend on memory type)
+ $decode_callback{$type}->(\@bytes)
+ if exists $decode_callback{$type};
+
+# Decode next 35 bytes (64-98, common to all memory types)
+ prints "Manufacturing Information";
+
+ @bytes = readspd64(64, $dimm_list[$i]);
+
+ $l = "Manufacturer";
+ # $extra is a reference to an array containing up to
+ # 7 extra bytes from the Manufacturer field. Sometimes
+ # these bytes are filled with interesting data.
+ ($temp, my $extra) = manufacturer(@bytes[0..7]);
+ printl $l, $temp;
+ $l = "Custom Manufacturer Data";
+ $temp = manufacturer_data(@{$extra});
+ printl $l, $temp if defined $temp;
+
+ if (spd_written($bytes[8])) {
+ # Try the location code as ASCII first, as earlier specifications
+ # suggested this. As newer specifications don't mention it anymore,
+ # we still fall back to binary.
+ $l = "Manufacturing Location Code";
+ $temp = (chr($bytes[8]) =~ m/^[\w\d]$/) ? chr($bytes[8])
+ : sprintf("0x%.2X", $bytes[8]);
+ printl $l, $temp;
+ }
+
+ $l = "Part Number";
+ $temp = part_number(@bytes[9..26]);
+ printl $l, $temp;
+
+ if (spd_written(@bytes[27..28])) {
+ $l = "Revision Code";
+ $temp = sprintf("0x%02X%02X\n", @bytes[27..28]);
+ printl $l, $temp;
+ }
+
+ if (spd_written(@bytes[29..30])) {
+ $l = "Manufacturing Date";
+ # In theory the year and week are in BCD format, but
+ # this is not always true in practice :(
+ if (($bytes[29] & 0xf0) <= 0x90
+ && ($bytes[29] & 0x0f) <= 0x09
+ && ($bytes[30] & 0xf0) <= 0x90
+ && ($bytes[30] & 0x0f) <= 0x09) {
+ # Note that this heuristic will break in year 2080
+ $temp = sprintf("%d%02X-W%02X\n",
+ $bytes[29] >= 0x80 ? 19 : 20,
+ @bytes[29..30]);
+ } else {
+ $temp = sprintf("0x%02X%02X\n",
+ @bytes[29..30]);
+ }
+ printl $l, $temp;
+ }
+
+ if (spd_written(@bytes[31..34])) {
+ $l = "Assembly Serial Number";
+ $temp = sprintf("0x%02X%02X%02X%02X\n",
+ @bytes[31..34]);
+ printl $l, $temp;
+ }
+
+# Next 27 bytes (99-125) are manufacturer specific, can't decode
+
+# Last 2 bytes (126-127) are reserved, Intel used them as an extension
+ if ($type eq "SDR SDRAM") {
+ decode_intel_spec_freq(\@bytes);
+ }
+
+ print "</table>\n" if $opt_html;
+ }
+}
+printl2 "\n\nNumber of SDRAM DIMMs detected and decoded", $dimm_count;
+
+print "</body></html>\n" if ($opt_html && !$opt_bodyonly);
--- /dev/null
+#!/usr/bin/perl -w
+#
+# Copyright (C) 2003-2006 Jean Delvare <khali@linux-fr.org>
+#
+# 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301 USA.
+#
+# Version 0.1 2003-07-17 Jean Delvare <khali@linux-fr.org>
+# Version 0.2 2003-07-22 Jean Delvare <khali@linux-fr.org>
+# Use print instead of syswrite.
+# Version 0.3 2003-08-24 Jean Delvare <khali@linux-fr.org>
+# Fix data block length (128 bytes instead of 256).
+# Version 1.0 2004-02-08 Jean Delvare <khali@linux-fr.org>
+# Added support for Linux 2.5/2.6 (i.e. sysfs).
+# Version 1.1 2006-09-01 Jean Delvare <khali@linux-fr.org>
+# Append /usr/sbin or /usr/local/sbin to $PATH if needed.
+#
+# EEPROM data decoding for EDID. EDID (Extended Display Identification
+# Data) is a VESA standard which allows storing (on manufacturer's side)
+# and retrieving (on user's side) of configuration information about
+# displays, such as manufacturer, serial number, physical dimensions and
+# allowed horizontal and vertical refresh rates.
+#
+# Using the eeprom kernel driver, you have two possibilities to
+# make use of these data:
+# 1* The ddcmon script.
+# 2* This script.
+# Both solutions will return a different kind of information. The first
+# method will report user-interesting information, such as the model number
+# or the year of manufacturing. The second method will report video-card-
+# interesting information, such as video modes and refresh rates.
+#
+# Note that this script does almost nothing by itself. It simply converts
+# what it finds in /proc to binary data to feed the parse-edid program.
+# The parse-edid program was written by John Fremlin and is available at
+# the following address:
+# http://john.fremlin.de/programs/linux/read-edid/
+
+use strict;
+use Fcntl qw(:DEFAULT :seek);
+use vars qw($bus $address);
+use constant PROCFS => 1;
+use constant SYSFS => 2;
+
+# parse-edid will typically be installed in /usr/sbin or /usr/local/sbin
+# even though regular users can run it
+$ENV{PATH} .= ':/usr/local/sbin'
+ if $ENV{PATH} !~ m,(^|:)/usr/local/sbin/?(:|$),
+ && -x '/usr/local/sbin/parse-edid';
+$ENV{PATH} .= ':/usr/sbin'
+ if $ENV{PATH} !~ m,(^|:)/usr/sbin/?(:|$),
+ && -x '/usr/sbin/parse-edid';
+
+sub edid_valid_procfs
+{
+ my ($bus, $addr) = @_;
+
+ open EEDATA, "/proc/sys/dev/sensors/eeprom-i2c-$bus-$addr/00";
+ my $line = <EEDATA>;
+ close EEDATA;
+ return 1
+ if $line =~ m/^0 255 255 255 255 255 255 0 /;
+ return 0;
+}
+
+# Only used for sysfs
+sub rawread
+{
+ my ($filename, $length, $offset) = @_;
+ my $bytes = '';
+
+ sysopen(FH, $filename, O_RDONLY)
+ or die "Can't open $filename";
+ if ($offset)
+ {
+ sysseek(FH, $offset, SEEK_SET)
+ or die "Can't seek in $filename";
+ }
+
+ $offset = 0;
+ while ($length)
+ {
+ my $r = sysread(FH, $bytes, $length, $offset);
+ die "Can't read $filename"
+ unless defined($r);
+ die "Unexpected EOF in $filename"
+ unless $r;
+ $offset += $r;
+ $length -= $r;
+ }
+ close(FH);
+
+ return $bytes;
+}
+
+sub edid_valid_sysfs
+{
+ my ($bus, $addr) = @_;
+ my $bytes = rawread("/sys/bus/i2c/devices/$bus-00$addr/eeprom", 8, 0);
+
+ return 1
+ if $bytes eq "\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00";
+ return 0;
+}
+
+sub bus_detect
+{
+ my $max = shift;
+
+ for (my $i=0; $i<$max; $i++)
+ {
+ if (-r "/proc/sys/dev/sensors/eeprom-i2c-$i-50/00")
+ {
+ if (edid_valid_procfs($i, '50'))
+ {
+ print STDERR
+ "decode-edid: using bus $i (autodetected)\n";
+ return $i;
+ }
+ }
+ elsif (-r "/sys/bus/i2c/devices/$i-0050/eeprom")
+ {
+ if (edid_valid_sysfs($i, '50'))
+ {
+ print STDERR
+ "decode-edid: using bus $i (autodetected)\n";
+ return $i;
+ }
+ }
+ }
+
+ return; # default
+}
+
+sub edid_decode
+{
+ my ($bus, $addr, $mode) = @_;
+
+ # Make sure it is an EDID EEPROM.
+
+ unless (($mode == PROCFS && edid_valid_procfs ($bus, $addr))
+ || ($mode == SYSFS && edid_valid_sysfs ($bus, $addr)))
+ {
+ print STDERR
+ "decode-edid: not an EDID EEPROM at $bus-$addr\n";
+ return;
+ }
+
+ $SIG{__WARN__} = sub { };
+ open PIPE, "| parse-edid"
+ or die "Can't open parse-edid. Please install read-edid.\n";
+ delete $SIG{__WARN__};
+ binmode PIPE;
+
+ if ($mode == PROCFS)
+ {
+ for (my $i=0; $i<=0x70; $i+=0x10)
+ {
+ my $file = sprintf '%02x', $i;
+ my $output = '';
+ open EEDATA, "/proc/sys/dev/sensors/eeprom-i2c-$bus-$addr/$file"
+ or die "Can't read /proc/sys/dev/sensors/eeprom-i2c-$bus-$addr/$file";
+ while(<EEDATA>)
+ {
+ foreach my $item (split)
+ {
+ $output .= pack "C", $item;
+ }
+ }
+ close EEDATA;
+ print PIPE $output;
+ }
+ }
+ elsif ($mode == SYSFS)
+ {
+ print PIPE rawread("/sys/bus/i2c/devices/$bus-00$address/eeprom", 128, 0);
+ }
+
+ close PIPE;
+}
+
+# Get the address. Default to 0x50 if not given.
+$address = $ARGV[1] || 0x50;
+# Convert to decimal, whatever the value.
+$address = oct $address if $address =~ m/^0/;
+# Convert to an hexadecimal string.
+$address = sprintf '%02x', $address;
+
+# Get the bus. Try to autodetect if not given.
+$bus = $ARGV[0] if defined $ARGV[0];
+$bus = bus_detect(8) unless defined $bus;
+
+if(defined $bus)
+{
+ print STDERR
+ "decode-edid: decode-edid version 1.1\n";
+ if (-r "/proc/sys/dev/sensors/eeprom-i2c-$bus-$address")
+ {
+ edid_decode ($bus, $address, PROCFS);
+ exit 0;
+ }
+ elsif (-r "/sys/bus/i2c/devices/$bus-00$address")
+ {
+ edid_decode ($bus, $address, SYSFS);
+ exit 0;
+ }
+}
+
+print STDERR
+ "EDID EEPROM not found. Please make sure that the eeprom module is loaded.\n";
+print STDERR
+ "Maybe your EDID EEPROM is on another bus. Try \"decode-edid ".($bus+1)."\".\n"
+ if defined $bus;
--- /dev/null
+#!/usr/bin/perl -w
+#
+# Copyright (C) 2002-2008 Jean Delvare <khali@linux-fr.org>
+#
+# 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301 USA.
+#
+# EEPROM data decoding for Sony Vaio laptops.
+#
+# The eeprom driver must be loaded. For kernels older than 2.6.0, the
+# eeprom driver can be found in the lm-sensors package.
+#
+# Please note that this is a guess-only work. Sony support refused to help
+# me, so if someone can provide information, please contact me.
+# My knowledge is summarized on this page:
+# http://khali.linux-fr.org/vaio/eeprom.html
+#
+# It seems that if present, the EEPROM is always at 0x57.
+#
+# Models tested so far:
+# PCG-F403 : No EEPROM
+# PCG-F707 : No EEPROM
+# PCG-GR114EK : OK
+# PCG-GR114SK : OK
+# PCG-GR214EP : OK
+# PCG-GRT955MP : OK
+# PCG-GRX316G : OK
+# PCG-GRX570 : OK
+# PCG-GRX600K : OK
+# PCG-U1 : OK
+# PCG-Z600LEK : No EEPROM
+# PCG-Z600NE : No EEPROM
+# VGN-S260 : OK
+# VGN-S4M/S : OK
+# VGN-TZ11MN/N : OK
+#
+# Thanks to Werner Heuser, Carsten Blume, Christian Gennerat, Joe Wreschnig,
+# Xavier Roche, Sebastien Lefevre, Lars Heer, Steve Dobson, Kent Hunt,
+# Timo Hoenig and others for their precious help.
+
+
+use strict;
+use Fcntl qw(:DEFAULT :seek);
+use vars qw($sysfs $found);
+
+use constant VERSION => "1.6";
+use constant ONLYROOT => "Readable only by root";
+
+sub print_item
+{
+ my ($label,$value) = @_;
+
+ printf("\%16s : \%s\n",$label,$value);
+}
+
+# Abstract reads so that other functions don't have to care wether
+# we need to use procfs or sysfs
+sub read_eeprom_bytes
+{
+ my ($bus, $addr, $offset, $length) = @_;
+ my $filename;
+
+ if ($sysfs)
+ {
+ $filename = "/sys/bus/i2c/devices/$bus-00$addr/eeprom";
+ sysopen(FH, $filename, O_RDONLY)
+ or die "Can't open $filename";
+ sysseek(FH, $offset, SEEK_SET)
+ or die "Can't seek in $filename";
+
+ my ($r, $bytes);
+ $bytes = '';
+ $offset = 0;
+ while($length)
+ {
+ $r = sysread(FH, $bytes, $length, $offset);
+ die "Can't read $filename"
+ unless defined($r);
+ die "Unexpected EOF in $filename"
+ unless $r;
+ $offset += $r;
+ $length -= $r;
+ }
+ close(FH);
+
+ return $bytes;
+ }
+ else
+ {
+ my $base = $offset & 0xf0;
+ $offset -= $base;
+ my $values = '';
+ my $remains = $length + $offset;
+
+ # Get all lines in a single string
+ while ($remains > 0)
+ {
+ $filename = "/proc/sys/dev/sensors/eeprom-i2c-$bus-$addr/"
+ . sprintf('%02x', $base);
+ open(FH, $filename)
+ or die "Can't open $filename";
+ $values .= <FH>;
+ close(FH);
+ $remains -= 16;
+ $base += 16;
+ }
+
+ # Store the useful part in an array
+ my @bytes = split(/[ \n]/, $values);
+ @bytes = @bytes[$offset..$offset+$length-1];
+
+ # Back to a binary string
+ return pack('C*', @bytes);
+ }
+}
+
+sub decode_string
+{
+ my ($bus, $addr, $offset, $length) = @_;
+
+ my $string = read_eeprom_bytes($bus, $addr, $offset, $length);
+ $string =~ s/\x00.*$//;
+
+ return($string);
+}
+
+sub decode_hexa
+{
+ my ($bus, $addr, $offset, $length) = @_;
+
+ my @bytes = unpack('C*', read_eeprom_bytes($bus, $addr, $offset, $length));
+ my $string='';
+
+ for(my $i=0;$i<$length;$i++)
+ {
+ $string.=sprintf('%02X', shift(@bytes));
+ }
+
+ return($string);
+}
+
+sub decode_uuid
+{
+ my ($bus,$addr,$base) = @_;
+
+ my @bytes = unpack('C16', read_eeprom_bytes($bus, $addr, $base, 16));
+ my $string='';
+
+ for(my $i=0;$i<16;$i++)
+ {
+ $string.=sprintf('%02x',shift(@bytes));
+ if(($i==3)||($i==5)||($i==7)||($i==9))
+ {
+ $string.='-';
+ }
+ }
+
+ if ($string eq '00000000-0000-0000-0000-000000000000')
+ {
+ return(ONLYROOT);
+ }
+ else
+ {
+ return($string);
+ }
+}
+
+sub vaio_decode
+{
+ my ($bus,$addr) = @_;
+
+ my $name = decode_string($bus, $addr, 128, 32);
+ # Simple heuristic to skip false positives
+ return 0 unless $name =~ m/^[A-Z-]{4}/;
+
+ print_item('Machine Name', $name);
+ my $serial = decode_string($bus, $addr, 192, 32);
+ print_item('Serial Number', $serial ? $serial : ONLYROOT);
+ print_item('UUID', decode_uuid($bus, $addr, 16));
+ my $revision = decode_string($bus, $addr, 160, 10);
+ print_item(length($revision) > 2 ? 'Service Tag' : 'Revision',
+ $revision);
+ print_item('Asset Tag', decode_string($bus, $addr, 170, 4).
+ decode_hexa($bus, $addr, 174, 12));
+ print_item('OEM Data', decode_string($bus, $addr, 32, 16));
+ print_item('Timestamp', decode_string($bus, $addr, 224, 18));
+ return 1;
+}
+
+BEGIN
+{
+ print("# Sony Vaio EEPROM Decoder version ".VERSION." by Jean Delvare\n\n");
+}
+
+END
+{
+ print("\n");
+}
+
+for (my $i = 0, $found=0; $i <= 4 && !$found; $i++)
+{
+ if (-r "/sys/bus/i2c/devices/$i-0057/eeprom")
+ {
+ $sysfs = 1;
+ $found += vaio_decode($i, '57');
+ }
+ elsif (-r "/proc/sys/dev/sensors/eeprom-i2c-$i-57")
+ {
+ if (-r "/proc/sys/dev/sensors/eeprom-i2c-$i-57/data0-15")
+ {
+ print("Deprecated old interface found. Please upgrade to lm_sensors 2.6.3 or greater.");
+ exit;
+ }
+ else
+ {
+ $sysfs = 0;
+ $found += vaio_decode($i, '57');
+ }
+ }
+}
+
+if (!$found)
+{
+ print("Vaio EEPROM not found. Please make sure that the eeprom module is loaded.\n");
+}
--- /dev/null
+#!/usr/bin/perl
+#
+# Copyright 1998, 1999 Philip Edelbrock <phil@netroedge.com>
+# and Mark Studebaker <mdsxyz123@yahoo.com>
+#
+# Version 0.1
+#
+#
+# ID ROM data decoding for Xeon processors.
+# Each Xeon processor contains two memories:
+# - A scratch EEPROM at an even location 0x50, 52, 54, or 56;
+# - An ID ROM at an odd location 0x51, 53, 55, or 57.
+# This program decodes the ID ROM's only.
+# The scratch EEPROMs have no prescribed format.
+# If the output of this program makes no sense for a particular device,
+# it is probably decoding a DIMM Serial Presence Detect (SPD) EEPROM.
+# See decode-dimms to decode those devices.
+#
+#
+# The eeprom driver must be loaded. For kernels older than 2.6.0, the
+# eeprom driver can be found in the lm-sensors package.
+#
+# To do:
+# Calculate and check checksums for each section
+# Decode flags in byte 0x7B (cartridge feature flags)
+#
+# References:
+# "Pentium II Xeon Processor at 400 and 450 MHz" Data Sheet
+# Intel
+#
+#
+#
+
+print "Xeon Processor Information ROM Decoder\n";
+print "Written by Philip Edelbrock and Mark Studebaker. Copyright 1998, 1999.\n";
+print "Version 2.6.3\n\n";
+
+$dimm_count=0;
+$_=`ls /proc/sys/dev/sensors/`;
+@dimm_list=split();
+
+for $i ( 0 .. $#dimm_list ) {
+ $_=$dimm_list[$i];
+ if ((/^eeprom-/) && (/-51$/ || /-53$/ || /-55$/ || /-57$/)) {
+ $dimm_count=$dimm_count + 1;
+
+ print "\nDecoding Xeon ROM: /proc/sys/dev/sensors/$dimm_list[$i]\n";
+ if (/^[^-]+-[^-]+-[^-]+-([^-]+)$/) {
+ $dimm_num=($1 - 49) / 2;
+ print "Guessing Xeon is number $dimm_num\n";
+ }
+# Decode first 16 bytes
+ print "\t\t----=== Xeon ROM Header Data ===----\n";
+
+ $_=`cat /proc/sys/dev/sensors/$dimm_list[$i]/00`;
+ @bytes=split(" ");
+
+ printf("\tData Format Revision: \t\t\t\t0x%.4X\n", $bytes[0]);
+
+ print "\tTotal number of bytes in EEPROM:\t\t";
+ print ($bytes[1] << 4) + $bytes[2];
+ print "\n";
+
+ printf("\tProcessor Data Address:\t\t\t\t0x%.2X\n", $bytes[3]);
+ printf("\tProcessor Core Data Address:\t\t\t0x%.2X\n", $bytes[4]);
+ printf("\tL2 Cache Data Address:\t\t\t\t0x%.2X\n", $bytes[5]);
+ printf("\tSEC Cartridge Data Address:\t\t\t0x%.2X\n", $bytes[6]);
+ printf("\tPart Number Data Address:\t\t\t0x%.2X\n", $bytes[7]);
+ printf("\tThermal Reference Data Address:\t\t\t0x%.2X\n", $bytes[8]);
+ printf("\tFeature Data Address:\t\t\t\t0x%.2X\n", $bytes[9]);
+ printf("\tOther Data Address:\t\t\t\t0x%.2X\n", $bytes[10]);
+
+ print "\t\t----=== Xeon ROM Processor Data ===----\n";
+
+# Decode next 16 bytes
+ $_=`cat /proc/sys/dev/sensors/$dimm_list[$i]/10`;
+ @bbytes=split(" ");
+ print "\tS-spec/QDF Number:\t\t\t\t\"";
+ print pack("cccccc",$bytes[14],$bytes[15],$bbytes[0],
+ $bbytes[1],$bbytes[2],$bbytes[3]);
+ print "\"\n";
+ $tmp = $bbytes[4] & 0xC0 >> 6;
+ printf("\tSample / Production:\t\t\t\t0x%.2X", $tmp);
+ if($tmp) {
+ print " (Production)\n";
+ } else {
+ print " (Sample)\n";
+ }
+
+ print "\t\t----=== Xeon ROM Core Data ===----\n";
+
+ printf("\tProcessor Core Type:\t\t\t\t0x%.2X\n",
+ ($bbytes[6] & 0xC0) >> 6);
+ printf("\tProcessor Core Family:\t\t\t\t0x%.2X\n",
+ ($bbytes[6] & 0x3C) >> 2);
+ printf("\tProcessor Core Model:\t\t\t\t0x%.2X\n",
+ (($bbytes[6] & 0x03) << 2) + (($bbytes[7] & 0xC0) >> 6));
+ printf("\tProcessor Core Stepping:\t\t\t0x%.2X\n",
+ ($bbytes[7] & 0x30) >> 4);
+ print "\tMaximum Core Frequency (Mhz):\t\t\t";
+ print ($bbytes[13] << 4) + $bbytes[14];
+ print "\n";
+
+# Decode next 16 bytes (32-47)
+ $_=`cat /proc/sys/dev/sensors/$dimm_list[$i]/20`;
+ @bytes=split(" ");
+ print "\tCore Voltage ID (mV):\t\t\t\t";
+ print ($bbytes[15] << 4) + $bytes[0];
+ print "\n";
+ print "\tCore Voltage Tolerance, High (mV):\t\t";
+ print $bytes[1];
+ print "\n";
+ print "\tCore Voltage Tolerance, Low (mV):\t\t";
+ print $bytes[2];
+ print "\n";
+
+ print "\t\t----=== Xeon ROM L2 Cache Data ===----\n";
+
+ print "\tL2 Cache Size (KB):\t\t\t\t";
+ print ($bytes[9] << 4) + $bytes[10];
+ print "\n";
+ printf("\tNumber of SRAM Components:\t\t\t%d\n",
+ ($bytes[11] & 0xF0) >> 4);
+ print "\tL2 Cache Voltage ID (mV):\t\t\t";
+ print ($bytes[12] << 4) + $bytes[13];
+ print "\n";
+ print "\tL2 Cache Voltage Tolerance, High (mV):\t\t";
+ print $bytes[14];
+ print "\n";
+ print "\tL2 Cache Voltage Tolerance, Low (mV):\t\t";
+ print $bytes[15];
+ print "\n";
+
+# Decode next 16 bytes (48-63)
+ $_=`cat /proc/sys/dev/sensors/$dimm_list[$i]/30`;
+ @bytes=split(" ");
+
+ printf("\tCache/Tag Stepping ID:\t\t\t\t0x%.2X\n",
+ ($bytes[0] & 0xF0) >> 4);
+
+ print "\t\t----=== Xeon ROM Cartridge Data ===----\n";
+
+ print "\tCartridge Revision:\t\t\t\t\"";
+ print pack("cccc",$bytes[2],$bytes[3],$bytes[4],$bytes[5]);
+ print "\"\n";
+ printf("\tSubstrate Rev. Software ID:\t\t\t0x%.2X\n",
+ ($bbytes[6] & 0xC0) >> 6);
+
+ print "\t\t----=== Xeon ROM Part Number Data ===----\n";
+
+ print "\tProcessor Part Number:\t\t\t\t\"";
+ print pack("ccccccc",$bytes[8],$bytes[9],$bytes[10],
+ $bytes[11],$bytes[12],$bytes[13],$bytes[14]);
+ print "\"\n";
+ $byte15=$byte[15];
+
+# Decode next 16 bytes (64-79)
+ $_=`cat /proc/sys/dev/sensors/$dimm_list[$i]/40`;
+ @bytes=split(" ");
+
+ print "\tProcessor BOM ID:\t\t\t\t\"";
+ print pack("cccccccccccccc",$byte15,$bytes[0],$bytes[1],
+ $bytes[2],$bytes[3],$bytes[4],$bytes[5],$bytes[6],
+ $bytes[7],$bytes[8],$bytes[9],$bytes[10],$bytes[11],
+ $bytes[12]);
+ print "\"\n";
+
+# Decode next 16 bytes (80-95)
+ $_=`cat /proc/sys/dev/sensors/$dimm_list[$i]/50`;
+ @bbytes=split(" ");
+ printf("\tProcessor Electronic Signature: \t\t0x%.2X%.2X%.2X%.2X%.2X%.2X%.2X%.2X\n",
+ $bytes[13],$bytes[14],$bytes[15],$bbytes[0],
+ $bbytes[1],$bbytes[2],$bbytes[3],$bbytes[4]);
+
+# Decode next 16 bytes (96-111)
+# Not used...
+
+# Decode next 16 bytes (112-127)
+ $_=`cat /proc/sys/dev/sensors/$dimm_list[$i]/70`;
+ @bytes=split(" ");
+
+ print "\t\t----=== Xeon Thermal Reference Data ===----\n";
+
+ printf("\tThermal Reference Byte: \t\t\t0x%.2X\n", $bytes[0]);
+
+ print "\t\t----=== Xeon ROM Feature Data ===----\n";
+
+ printf("\tProcessor Core Feature Flags: \t\t\t0x%.2X%.2X%.2X%.2X\n",
+ $bytes[4],$bytes[5],$bytes[6],$bytes[7]);
+ printf("\tCartridge Feature Flags: \t\t\t0x%.2X%.2X%.2X%.2X\n",
+ $bytes[8],$bytes[9],$bytes[10],$bytes[11]);
+ printf("\tNumber of Devices in TAP Chain:\t\t\t%d\n",
+ ($bytes[12] & 0xF0) >> 4);
+
+ }
+}
+print "\n\nNumber of Xeon ROMs detected and decoded: $dimm_count\n";
--- /dev/null
+/***************************************************************************
+ copyright : (C) by 2002-2003 Stefano Barbato
+ email : stefano@codesink.org
+
+ $Id: 24cXX.c 4230 2006-11-10 09:22:12Z khali $
+ ***************************************************************************/
+
+/***************************************************************************
+ * *
+ * 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; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ ***************************************************************************/
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <linux/fs.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <assert.h>
+#include <string.h>
+#include "24cXX.h"
+
+static int i2c_write_1b(struct eeprom *e, __u8 buf)
+{
+ int r;
+ // we must simulate a plain I2C byte write with SMBus functions
+ r = i2c_smbus_write_byte(e->fd, buf);
+ if(r < 0)
+ fprintf(stderr, "Error i2c_write_1b: %s\n", strerror(errno));
+ usleep(10);
+ return r;
+}
+
+static int i2c_write_2b(struct eeprom *e, __u8 buf[2])
+{
+ int r;
+ // we must simulate a plain I2C byte write with SMBus functions
+ r = i2c_smbus_write_byte_data(e->fd, buf[0], buf[1]);
+ if(r < 0)
+ fprintf(stderr, "Error i2c_write_2b: %s\n", strerror(errno));
+ usleep(10);
+ return r;
+}
+
+static int i2c_write_3b(struct eeprom *e, __u8 buf[3])
+{
+ int r;
+ // we must simulate a plain I2C byte write with SMBus functions
+ // the __u16 data field will be byte swapped by the SMBus protocol
+ r = i2c_smbus_write_word_data(e->fd, buf[0], buf[2] << 8 | buf[1]);
+ if(r < 0)
+ fprintf(stderr, "Error i2c_write_3b: %s\n", strerror(errno));
+ usleep(10);
+ return r;
+}
+
+
+#define CHECK_I2C_FUNC( var, label ) \
+ do { if(0 == (var & label)) { \
+ fprintf(stderr, "\nError: " \
+ #label " function is required. Program halted.\n\n"); \
+ exit(1); } \
+ } while(0);
+
+int eeprom_open(char *dev_fqn, int addr, int type, struct eeprom* e)
+{
+ int fd, r;
+ unsigned long funcs;
+ e->fd = e->addr = 0;
+ e->dev = 0;
+
+ fd = open(dev_fqn, O_RDWR);
+ if(fd <= 0)
+ return -1;
+
+ // get funcs list
+ if((r = ioctl(fd, I2C_FUNCS, &funcs) < 0))
+ return r;
+
+
+ // check for req funcs
+ CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_READ_BYTE );
+ CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_WRITE_BYTE );
+ CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_READ_BYTE_DATA );
+ CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_WRITE_BYTE_DATA );
+ CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_READ_WORD_DATA );
+ CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_WRITE_WORD_DATA );
+
+ // set working device
+ if( ( r = ioctl(fd, I2C_SLAVE, addr)) < 0)
+ return r;
+ e->fd = fd;
+ e->addr = addr;
+ e->dev = dev_fqn;
+ e->type = type;
+ return 0;
+}
+
+int eeprom_close(struct eeprom *e)
+{
+ close(e->fd);
+ e->fd = -1;
+ e->dev = 0;
+ e->type = EEPROM_TYPE_UNKNOWN;
+ return 0;
+}
+
+#if 0
+int eeprom_24c32_write_byte(struct eeprom *e, __u16 mem_addr, __u8 data)
+{
+ __u8 buf[3] = { (mem_addr >> 8) & 0x00ff, mem_addr & 0x00ff, data };
+ return i2c_write_3b(e, buf);
+}
+
+
+int eeprom_24c32_read_current_byte(struct eeprom* e)
+{
+ ioctl(e->fd, BLKFLSBUF); // clear kernel read buffer
+ return i2c_smbus_read_byte(e->fd);
+}
+
+int eeprom_24c32_read_byte(struct eeprom* e, __u16 mem_addr)
+{
+ int r;
+ ioctl(e->fd, BLKFLSBUF); // clear kernel read buffer
+ __u8 buf[2] = { (mem_addr >> 8) & 0x0ff, mem_addr & 0x0ff };
+ r = i2c_write_2b(e, buf);
+ if (r < 0)
+ return r;
+ r = i2c_smbus_read_byte(e->fd);
+ return r;
+}
+#endif
+
+
+int eeprom_read_current_byte(struct eeprom* e)
+{
+ ioctl(e->fd, BLKFLSBUF); // clear kernel read buffer
+ return i2c_smbus_read_byte(e->fd);
+}
+
+int eeprom_read_byte(struct eeprom* e, __u16 mem_addr)
+{
+ int r;
+ ioctl(e->fd, BLKFLSBUF); // clear kernel read buffer
+ if(e->type == EEPROM_TYPE_8BIT_ADDR)
+ {
+ __u8 buf = mem_addr & 0x0ff;
+ r = i2c_write_1b(e, buf);
+ } else if(e->type == EEPROM_TYPE_16BIT_ADDR) {
+ __u8 buf[2] = { (mem_addr >> 8) & 0x0ff, mem_addr & 0x0ff };
+ r = i2c_write_2b(e, buf);
+ } else {
+ fprintf(stderr, "ERR: unknown eeprom type\n");
+ return -1;
+ }
+ if (r < 0)
+ return r;
+ r = i2c_smbus_read_byte(e->fd);
+ return r;
+}
+
+int eeprom_write_byte(struct eeprom *e, __u16 mem_addr, __u8 data)
+{
+ if(e->type == EEPROM_TYPE_8BIT_ADDR) {
+ __u8 buf[2] = { mem_addr & 0x00ff, data };
+ return i2c_write_2b(e, buf);
+ } else if(e->type == EEPROM_TYPE_16BIT_ADDR) {
+ __u8 buf[3] =
+ { (mem_addr >> 8) & 0x00ff, mem_addr & 0x00ff, data };
+ return i2c_write_3b(e, buf);
+ } else {
+ fprintf(stderr, "ERR: unknown eeprom type\n");
+ return -1;
+ }
+}
+
--- /dev/null
+/***************************************************************************
+ copyright : (C) by 2002-2003 Stefano Barbato
+ email : stefano@codesink.org
+
+ $Id: 24cXX.h 4495 2007-06-27 12:57:50Z khali $
+ ***************************************************************************/
+
+/***************************************************************************
+ * *
+ * 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; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ ***************************************************************************/
+#ifndef _24CXX_H_
+#define _24CXX_H_
+#include <linux/i2c-dev.h>
+
+#define EEPROM_TYPE_UNKNOWN 0
+#define EEPROM_TYPE_8BIT_ADDR 1
+#define EEPROM_TYPE_16BIT_ADDR 2
+
+struct eeprom
+{
+ char *dev; // device file i.e. /dev/i2c-N
+ int addr; // i2c address
+ int fd; // file descriptor
+ int type; // eeprom type
+};
+
+/*
+ * opens the eeprom device at [dev_fqn] (i.e. /dev/i2c-N) whose address is
+ * [addr] and set the eeprom_24c32 [e]
+ */
+int eeprom_open(char *dev_fqn, int addr, int type, struct eeprom*);
+/*
+ * closees the eeprom device [e]
+ */
+int eeprom_close(struct eeprom *e);
+/*
+ * read and returns the eeprom byte at memory address [mem_addr]
+ * Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
+ */
+int eeprom_read_byte(struct eeprom* e, __u16 mem_addr);
+/*
+ * read the current byte
+ * Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
+ */
+int eeprom_read_current_byte(struct eeprom *e);
+/*
+ * writes [data] at memory address [mem_addr]
+ * Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
+ */
+int eeprom_write_byte(struct eeprom *e, __u16 mem_addr, __u8 data);
+
+#endif
+
--- /dev/null
+#eepromer Makefile
+
+CFLAGS = -O2 -I../include -Wall
+
+all: eepromer eeprom eeprog
+
+eepromer: eepromer.o
+
+eeprom: eeprom.o
+
+eeprog: eeprog.o 24cXX.o
+
+clean:
+ rm -rf *~ *.o eepromer eeprom eeprog
--- /dev/null
+These programs are used to read and write eeproms.
+
+Use eeprom for small eeproms with one-byte addresses:
+ 24C01, 24C01A, 24C02, 24C04, 24C08, and 24C16
+ It works only on true i2c bus adapters.
+ See README.eeprom for details.
+
+Use eepromer for large eeproms with two-byte addresses:
+ 24C32, 24C64, 24C128, 24C256, and 24C512
+ It works only on true i2c bus adapters.
+ See README.eepromer for details.
+
+Use eeprog for either small or large eeproms.
+ Use the -16 switch for large eeproms.
+ It works on both i2c and smbus bus adapters.
+ See README.eeprog for details.
+
+
+!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Warning !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+!!! !
+!!! These programs should only be used on external busses such as i2c-pport !
+!!! unless you REALLY know what you are doing. !
+!!! !
+!!! Your computer probably contains eeproms for saving data vital to its !
+!!! operation. If you are not careful you might overwrite this data with !
+!!! this program and your computer may no longer boot! !
+!!! !
+!!! An example are the EEPROMS on your SDRAM DIMMs, your computer may no !
+!!! longer detect the RAM module rendering it essentially USELESS! !
+!!! !
+!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Warning !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
--- /dev/null
+Important! See the README file for important warnings.
+
+eeprog reads and writes 24Cxx EEPROMs connected to I2C serial bus.
+
+It uses the SMBus protocol used by most of the recent chipsets. Don't forget to load
+your i2c chipset and the i2c-dev drivers.
+
+Use -16 switch for EEPROM larger then 24C16 (16 bit addressing mode).
+
+Again, it's really important that you read the README file.
+
+Type "make" to compile.
--- /dev/null
+You can use this program to read/write to i2c-eeproms
+like the popular 24C16, 24C08, 24C04,.. In contrast to eeprommer
+which supports 24C256-type eeproms 24C16ss use 1-byte addresses!
+
+!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Warning !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+!!! !
+!!! This program should only be used on external busses such as i2c-pport. !
+!!! !
+!!! Your computer may contain i2c-eeproms for saving data vital to its !
+!!! operation. If you are not careful you might overwrite this data with !
+!!! this program and your computer may no longer boot! !
+!!! !
+!!! An example are the EEPROMS on your SDRAM DIMMs, your computer may no !
+!!! longer detect the RAM module rendering it essentially USELESS! !
+!!! !
+!!! IBM Thinkpads are said to store their configuration data in a eeprom, !
+!!! if you manage to overwrite this eeprom you will have to send your !
+!!! computer to the manufacturer for a costly repair! !
+!!! !
+!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Warning !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+It has several options:
+
+ -d devicenode
+
+ set this to the device-node of the i2c-bus
+ you want to use like /dev/i2c-0.
+ Use /dev/i2c-1 for the second bus, i2c-2 for the third...
+
+ The default /dev/i2c-0 should work most of the time.
+
+ -a address
+
+ set this to the device-address of your
+ eeprom. For a 24C16 the address is hardcoded to
+ 0x50, which is -you guessed it- the default.
+
+ For a 24C08 and smaller types you can choose which
+ addresses they occupy by forcing the address-pins
+ of the chip to High or Low so here the address may differ.
+
+ -p number_of_pages
+
+ set this to the number of pages you want to read
+ from or write to the eeprom. The 24C16 maps it's
+ pages to consecutive addresses on the i2c-bus so
+ we will try to read 256 bytes from every i2c
+ address between 'address' (inclusive) and
+ 'address + number_of_pages' (exclusive)...
+
+ A 24C16 has 8 pages so that's the default for this
+ parameter.
+
+ -f filename
+
+ read data from this file (when writing to eeprom) or
+ write data to this file (when reading from eeprom).
+
+ When reading a file that's smaller than the
+ eeprom's storage size we will pad the eeprom
+ with zeroes.
+
+ If no file is given we will just read the
+ eeprom (while in read-mode) and test it's presence
+ this way. In write-mode we will just write zeroes
+ to the eeprom.
+
+ -w When '-w' is present we will *write* to the eeprom.
+ If you do not specify '-w' we will read the contents
+ of the eeprom.
+
+ -y This flag will suppress the warning when you write to the
+ eeprom. You will not be required to enter 'yes' so be careful
+ when using this switch!
+
+
+I wrote that program to clear a 24C16 eeprom that sit's in my crappy
+satellite receiver because sometimes its Z80 processor likes to
+write garbage to it and then crash....
+
+No further testing besides writing a long series of "The quick brown
+fox jumps over the lazy dog!" and reading it back has been done so
+of course this comes without any warranty.
+
+ Chris <chris@hedonism.cx>
--- /dev/null
+Simple program for storing data to I2C EEPROM.
+
+!!!!!!!!!!!!!!!!!!!!!!!!Warning!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+The EEPROM must be a large EEPROM which uses a 2-byte address
+field (24C32 or larger). It will NOT WORK on small EEPROMs
+(24C01 - 24C16) such as those used on SDRAM DIMMs.
+
+Tested only on 24C256.
+
+!!!!!!!!!!!!!!!!!!!!!!!!Warning!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+This program is intended for use on eeproms using external busses such as
+i2c-pport.
+Do not use this on your SDRAM DIMM EEPROMS, it won't work!!!!!!!!!
+Doing so will render your SDRAM USELESS and leave your system UNBOOTABLE!!!
+
+!!!!!!!!!!!!!!!!!!!!!!!!Warning!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+Options:
+ -r read
+ -w write
+ -e erase
+ -p print "super block of EEPROM" (date and size stored data)
+
+Daniel Smolik
+marvin@sitour.cz
--- /dev/null
+/***************************************************************************
+ copyright : (C) by 2002-2003 Stefano Barbato
+ email : stefano@codesink.org
+
+ $Id: eeprog.c 5122 2008-02-18 09:22:21Z khali $
+ ***************************************************************************/
+
+/***************************************************************************
+ * *
+ * 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; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ ***************************************************************************/
+#include <stdio.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "24cXX.h"
+
+#define VERSION "0.7.5"
+
+#define ENV_DEV "EEPROG_DEV"
+#define ENV_I2C_ADDR "EEPROG_I2C_ADDR"
+
+int g_quiet;
+
+#define usage_if(a) do { do_usage_if( a , __LINE__); } while(0);
+void do_usage_if(int b, int line)
+{
+ static const char *eeprog_usage =
+"eeprog " VERSION ", a 24Cxx EEPROM reader/writer\n"
+"Copyright (c) 2003 by Stefano Barbato - All rights reserved.\n"
+"Usage: eeprog [-fqxdh] [-16|-8] [ -r addr[:count] | -w addr ] /dev/i2c-N i2c-address\n"
+"\n"
+" Address modes:\n"
+" -8 Use 8bit address mode for 24c0x...24C16 [default]\n"
+" -16 Use 16bit address mode for 24c32...24C256\n"
+" Actions:\n"
+" -r addr[:count] Read [count] (1 if omitted) bytes from [addr]\n"
+" and print them to the standard output\n"
+" -w addr Write input (stdin) at address [addr] of the EEPROM\n"
+" -h Print this help\n"
+" Options:\n"
+" -x Set hex output mode\n"
+" -d Dummy mode, display what *would* have been done\n"
+" -f Disable warnings and don't ask confirmation\n"
+" -q Quiet mode\n"
+"\n"
+"The following environment variables could be set instead of the command\n"
+"line arguments:\n"
+" EEPROG_DEV device name(/dev/i2c-N)\n"
+" EEPROG_I2C_ADDR i2c-address\n"
+"\n"
+" Examples\n"
+" 1- read 64 bytes from the EEPROM at address 0x54 on bus 0 starting\n"
+" at address 123 (decimal)\n"
+" eeprog /dev/i2c-0 0x54 -r 123:64\n"
+" 2- prints the hex codes of the first 32 bytes read from bus 1\n"
+" at address 0x22\n"
+" eeprog /dev/i2c-1 0x51 -x -r 0x22:0x20\n"
+" 3- write the current timestamp at address 0x200 of the EEPROM on\n"
+" bus 0 at address 0x33\n"
+" date | eeprog /dev/i2c-0 0x33 -w 0x200\n";
+
+ if(!b)
+ return;
+ fprintf(stderr, "%s\n[line %d]\n", eeprog_usage, line);
+ exit(1);
+}
+
+
+#define die_if(a, msg) do { do_die_if( a , msg, __LINE__); } while(0);
+void do_die_if(int b, char* msg, int line)
+{
+ if(!b)
+ return;
+ fprintf(stderr, "Error at line %d: %s\n", line, msg);
+ //fprintf(stderr, " sysmsg: %s\n", strerror(errno));
+ exit(1);
+}
+
+#define print_info(args...) do { if(!g_quiet) fprintf(stderr, args); } while(0);
+
+void parse_arg(char *arg, int* paddr, int *psize)
+{
+ char *end;
+ *paddr = strtoul(arg, &end, 0);
+ if(*end == ':')
+ *psize = strtoul(++end, 0, 0);
+}
+
+int confirm_action()
+{
+ fprintf(stderr,
+ "\n"
+ "____________________________WARNING____________________________\n"
+ "Erroneously writing to a system EEPROM (like DIMM SPD modules)\n"
+ "can break your system. It will NOT boot anymore so you'll not\n"
+ "be able to fix it.\n"
+ "\n"
+ "Reading from 8bit EEPROMs (like that in your DIMM) without using\n"
+ "the -8 switch can also UNEXPECTEDLY write to them, so be sure to\n"
+ "use the -8 command param when required.\n"
+ "\n"
+ "Use -f to disable this warning message\n"
+ "\n"
+ "Press ENTER to continue or hit CTRL-C to exit\n"
+ "\n"
+ );
+ getchar();
+ return 1;
+}
+
+
+int read_from_eeprom(struct eeprom *e, int addr, int size, int hex)
+{
+
+ int ch, i;
+ // hex print out
+ die_if((ch = eeprom_read_byte(e, addr)) < 0, "read error");
+ i = 1;
+ if(hex)
+ printf("\n %.4x| %.2x ", addr, ch);
+ else
+ putchar(ch);
+ while(--size)
+ {
+ die_if((ch = eeprom_read_current_byte(e)) < 0, "read error");
+ if(hex)
+ {
+ addr++;
+ if( (i % 16) == 0 )
+ printf("\n %.4x| ", addr);
+ else if( (i % 8) == 0 )
+ printf(" ");
+ i++;
+ printf("%.2x ", ch);
+ } else {
+ putchar(ch);
+ }
+ }
+ if(hex)
+ printf("\n\n");
+ fflush(stdout);
+ return 0;
+}
+
+int write_to_eeprom(struct eeprom *e, int addr)
+{
+ int c;
+ while((c = getchar()) != EOF)
+ {
+ print_info(".");
+ fflush(stdout);
+ die_if(eeprom_write_byte(e, addr++, c), "write error");
+ }
+ print_info("\n\n");
+ return 0;
+}
+
+int main(int argc, char** argv)
+{
+ struct eeprom e;
+ int ret, op, i2c_addr, memaddr, size, want_hex, dummy, force, sixteen;
+ char *device, *arg = 0, *i2c_addr_s;
+ struct stat st;
+ int eeprom_type = 0;
+
+ op = want_hex = dummy = force = sixteen = 0;
+ g_quiet = 0;
+
+ while((ret = getopt(argc, argv, "1:8fr:qhw:xd")) != -1)
+ {
+ switch(ret)
+ {
+ case '1':
+ usage_if(*optarg != '6' || strlen(optarg) != 1);
+ die_if(eeprom_type, "EEPROM type switch (-8 or -16) used twice");
+ eeprom_type = EEPROM_TYPE_16BIT_ADDR;
+ break;
+ case 'x':
+ want_hex++;
+ break;
+ case 'd':
+ dummy++;
+ break;
+ case '8':
+ die_if(eeprom_type, "EEPROM type switch (-8 or -16) used twice");
+ eeprom_type = EEPROM_TYPE_8BIT_ADDR;
+ break;
+ case 'f':
+ force++;
+ break;
+ case 'q':
+ g_quiet++;
+ break;
+ case 'h':
+ usage_if(1);
+ break;
+ default:
+ die_if(op != 0, "Both read and write requested");
+ arg = optarg;
+ op = ret;
+ }
+ }
+ if(!eeprom_type)
+ eeprom_type = EEPROM_TYPE_8BIT_ADDR; // default
+
+ usage_if(op == 0); // no switches
+ // set device and i2c_addr reading from cmdline or env
+ device = i2c_addr_s = 0;
+ switch(argc - optind)
+ {
+ case 0:
+ device = getenv(ENV_DEV);
+ i2c_addr_s = getenv(ENV_I2C_ADDR);
+ break;
+ case 1:
+ if(stat(argv[optind], &st) != -1)
+ {
+ device = argv[optind];
+ i2c_addr_s = getenv(ENV_I2C_ADDR);
+ } else {
+ device = getenv(ENV_DEV);
+ i2c_addr_s = argv[optind];
+ }
+ break;
+ case 2:
+ device = argv[optind++];
+ i2c_addr_s = argv[optind];
+ break;
+ default:
+ usage_if(1);
+ }
+ usage_if(!device || !i2c_addr_s);
+ i2c_addr = strtoul(i2c_addr_s, 0, 0);
+
+ print_info("eeprog %s, a 24Cxx EEPROM reader/writer\n", VERSION);
+ print_info("Copyright (c) 2003 by Stefano Barbato - All rights reserved.\n");
+ print_info(" Bus: %s, Address: 0x%x, Mode: %dbit\n",
+ device, i2c_addr,
+ (eeprom_type == EEPROM_TYPE_8BIT_ADDR ? 8 : 16) );
+ if(dummy)
+ {
+ fprintf(stderr, "Dummy mode selected, nothing done.\n");
+ return 0;
+ }
+ die_if(eeprom_open(device, i2c_addr, eeprom_type, &e) < 0,
+ "unable to open eeprom device file (check that the file exists and that it's readable)");
+ switch(op)
+ {
+ case 'r':
+ if(force == 0)
+ confirm_action();
+ size = 1; // default
+ parse_arg(arg, &memaddr, &size);
+ print_info(" Reading %d bytes from 0x%x\n", size, memaddr);
+ read_from_eeprom(&e, memaddr, size, want_hex);
+ break;
+ case 'w':
+ if(force == 0)
+ confirm_action();
+ parse_arg(arg, &memaddr, &size);
+ print_info(" Writing stdin starting at address 0x%x\n",
+ memaddr);
+ write_to_eeprom(&e, memaddr);
+ break;
+ default:
+ usage_if(1);
+ exit(1);
+ }
+ eeprom_close(&e);
+
+ return 0;
+}
+
--- /dev/null
+/*
+This program is hereby placed into the public domain.
+Of course the program is provided without warranty of any kind.
+*/
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+#include <linux/i2c-dev.h>
+
+/*
+ this program can read 24C16 (and probably smaller ones, too)
+ I wrote it as a quick and dirty hack because my satellite receiver
+ hung again... so I had to reprogram the eeprom where is stores it's
+ settings.
+ */
+
+#define DEFAULT_I2C_BUS "/dev/i2c-0"
+#define DEFAULT_EEPROM_ADDR 0x50 /* the 24C16 sits on i2c address 0x50 */
+#define DEFAULT_NUM_PAGES 8 /* we default to a 24C16 eeprom which has 8 pages */
+#define BYTES_PER_PAGE 256 /* one eeprom page is 256 byte */
+#define MAX_BYTES 8 /* max number of bytes to write in one chunk */
+ /* ... note: 24C02 and 24C01 only allow 8 bytes to be written in one chunk. *
+ * if you are going to write 24C04,8,16 you can change this to 16 */
+
+/* write len bytes (stored in buf) to eeprom at address addr, page-offset offset */
+/* if len=0 (buf may be NULL in this case) you can reposition the eeprom's read-pointer */
+/* return 0 on success, -1 on failure */
+int eeprom_write(int fd,
+ unsigned int addr,
+ unsigned int offset,
+ unsigned char *buf,
+ unsigned char len
+){
+ struct i2c_rdwr_ioctl_data msg_rdwr;
+ struct i2c_msg i2cmsg;
+ int i;
+ char _buf[MAX_BYTES + 1];
+
+ if(len>MAX_BYTES){
+ fprintf(stderr,"I can only write MAX_BYTES bytes at a time!\n");
+ return -1;
+ }
+
+ if(len+offset >256){
+ fprintf(stderr,"Sorry, len(%d)+offset(%d) > 256 (page boundary)\n",
+ len,offset);
+ return -1;
+ }
+
+ _buf[0]=offset; /* _buf[0] is the offset into the eeprom page! */
+ for(i=0;i<len;i++) /* copy buf[0..n] -> _buf[1..n+1] */
+ _buf[1+i]=buf[i];
+
+ msg_rdwr.msgs = &i2cmsg;
+ msg_rdwr.nmsgs = 1;
+
+ i2cmsg.addr = addr;
+ i2cmsg.flags = 0;
+ i2cmsg.len = 1+len;
+ i2cmsg.buf = _buf;
+
+ if((i=ioctl(fd,I2C_RDWR,&msg_rdwr))<0){
+ perror("ioctl()");
+ fprintf(stderr,"ioctl returned %d\n",i);
+ return -1;
+ }
+
+ if(len>0)
+ fprintf(stderr,"Wrote %d bytes to eeprom at 0x%02x, offset %08x\n",
+ len,addr,offset);
+ else
+ fprintf(stderr,"Positioned pointer in eeprom at 0x%02x to offset %08x\n",
+ addr,offset);
+
+ return 0;
+}
+
+/* read len bytes stored in eeprom at address addr, offset offset in array buf */
+/* return -1 on error, 0 on success */
+int eeprom_read(int fd,
+ unsigned int addr,
+ unsigned int offset,
+ unsigned char *buf,
+ unsigned char len
+){
+ struct i2c_rdwr_ioctl_data msg_rdwr;
+ struct i2c_msg i2cmsg;
+ int i;
+
+ if(len>MAX_BYTES){
+ fprintf(stderr,"I can only write MAX_BYTES bytes at a time!\n");
+ return -1;
+ }
+
+ if(eeprom_write(fd,addr,offset,NULL,0)<0)
+ return -1;
+
+ msg_rdwr.msgs = &i2cmsg;
+ msg_rdwr.nmsgs = 1;
+
+ i2cmsg.addr = addr;
+ i2cmsg.flags = I2C_M_RD;
+ i2cmsg.len = len;
+ i2cmsg.buf = buf;
+
+ if((i=ioctl(fd,I2C_RDWR,&msg_rdwr))<0){
+ perror("ioctl()");
+ fprintf(stderr,"ioctl returned %d\n",i);
+ return -1;
+ }
+
+ fprintf(stderr,"Read %d bytes from eeprom at 0x%02x, offset %08x\n",
+ len,addr,offset);
+
+ return 0;
+}
+
+
+
+int main(int argc, char **argv){
+ int i,j;
+
+ /* filedescriptor and name of device */
+ int d;
+ char *dn=DEFAULT_I2C_BUS;
+
+ /* filedescriptor and name of data file */
+ int f=-1;
+ char *fn=NULL;
+
+ unsigned int addr=DEFAULT_EEPROM_ADDR;
+ int rwmode=0;
+ int pages=DEFAULT_NUM_PAGES;
+
+ int force=0; /* suppress warning on write! */
+
+ while((i=getopt(argc,argv,"d:a:p:wyf:h"))>=0){
+ switch(i){
+ case 'h':
+ fprintf(stderr,"%s [-d dev] [-a adr] [-p pgs] [-w] [-y] [-f file]\n",argv[0]);
+ fprintf(stderr,"\tdev: device, e.g. /dev/i2c-0 (def)\n");
+ fprintf(stderr,"\tadr: base address of eeprom, eg 0xA0 (def)\n");
+ fprintf(stderr,"\tpgs: number of pages to read, eg 8 (def)\n");
+ fprintf(stderr,"\t-w : write to eeprom (default is reading!)\n");
+ fprintf(stderr,"\t-y : suppress warning when writing (default is to warn!)\n");
+ fprintf(stderr,"\t-f file: copy eeprom contents to/from file\n");
+ fprintf(stderr,"\t (default for read is test only; for write is all zeros)\n");
+ fprintf(stderr,"Note on pages/addresses:\n");
+ fprintf(stderr,"\teeproms with more than 256 byte appear as if they\n");
+ fprintf(stderr,"\twere several eeproms with consecutive addresses on the bus\n");
+ fprintf(stderr,"\tso we might as well address several seperate eeproms with\n");
+ fprintf(stderr,"\tincreasing addresses....\n\n");
+ exit(1);
+ break;
+ case 'd':
+ dn=optarg;
+ break;
+ case 'a':
+ if(sscanf(optarg,"0x%x",&addr)!=1){
+ fprintf(stderr,"Cannot parse '%s' as addrs., example: 0xa0\n",
+ optarg);
+ exit(1);
+ }
+ break;
+ case 'p':
+ if(sscanf(optarg,"%d",&pages)!=1){
+ fprintf(stderr,"Cannot parse '%s' as number of pages, example: 8\n",
+ optarg);
+ exit(1);
+ }
+ break;
+ case 'w':
+ rwmode++;
+ break;
+ case 'f':
+ fn=optarg;
+ break;
+ case 'y':
+ force++;
+ break;
+ }
+
+ }
+
+ fprintf(stderr,"base-address of eeproms : 0x%02x\n",addr);
+ fprintf(stderr,"number of pages to read : %d (0x%02x .. 0x%02x)\n",
+ pages,addr,addr+pages-1);
+
+ if(fn){
+ if(!rwmode) /* if we are reading, *WRITE* to file */
+ f=open(fn,O_WRONLY|O_CREAT,0666);
+ else /* if we are writing to eeprom, *READ* from file */
+ f=open(fn,O_RDONLY);
+ if(f<0){
+ fprintf(stderr,"Could not open data-file %s for reading or writing\n",fn);
+ perror(fn);
+ exit(1);
+ }
+ fprintf(stderr,"file opened for %7s : %s\n",rwmode?"reading":"writing",fn);
+ fprintf(stderr," on filedescriptor : %d\n",f);
+ }
+
+ if((d=open(dn,O_RDWR))<0){
+ fprintf(stderr,"Could not open i2c at %s\n",dn);
+ perror(dn);
+ exit(1);
+ }
+
+ fprintf(stderr,"i2c-devicenode is : %s\n",dn);
+ fprintf(stderr," on filedescriptor : %d\n\n",d);
+
+ /***
+ *** I'm not the one to blame of you screw your computer!
+ ***/
+ if(rwmode && ! force){
+ unsigned char warnbuf[4];
+ fprintf(stderr,"**WARNING**\n");
+ fprintf(stderr," - \tYou have chosen to WRITE to this eeprom.\n");
+ fprintf(stderr,"\tMake sure that this tiny chip is *NOT* vital to the\n");
+ fprintf(stderr,"\toperation of your computer as you can easily corrupt\n");
+ fprintf(stderr,"\tthe configuration memory of your SDRAM-memory-module,\n");
+ fprintf(stderr,"\tyour IBM ThinkPad or whatnot...! Fixing these errors can be\n");
+ fprintf(stderr,"\ta time-consuming and very costly process!\n\n");
+ fprintf(stderr,"Things to consider:\n");
+ fprintf(stderr," - \tYou can have more than one i2c-bus, check in /proc/bus/i2c\n");
+ fprintf(stderr,"\tand specify the correct one with -d\n");
+ fprintf(stderr,"\tright now you have chosen to use '%s'\n",dn);
+ fprintf(stderr," - \tA eeprom can occupy several i2c-addresses (one per page)\n");
+ fprintf(stderr,"\tso please make sure that there is no vital eeprom in your computer\n");
+ fprintf(stderr,"\tsitting at addresses between 0x%02x and 0x%02x\n",addr,addr+pages-1);
+
+ fprintf(stderr,"Enter 'yes' to continue:");
+ fflush(stderr);
+ if(!fgets(warnbuf,sizeof(warnbuf),stdin)){
+ fprintf(stderr,"\nCould not read confirmation from stdin!\n");
+ exit(1);
+ }
+ if(strncmp(warnbuf,"yes",3)){
+ fprintf(stderr,"\n** ABORTING WRITE! **, you did not answer 'yes'\n");
+ exit(1);
+ }
+ }
+
+ for(i=0;i<pages;i++){
+ unsigned char buf[BYTES_PER_PAGE];
+
+ if(rwmode){
+
+ if(f>=0){
+ j=read(f,buf,sizeof(buf));
+ if(j<0){
+ fprintf(stderr,"Cannot read from file '%s'\n",fn);
+ perror(fn);
+ exit(1);
+ }
+ if(j!=sizeof(buf)){
+ fprintf(stderr,"File '%s' is too small, padding eeprom with zeroes\n",fn);
+ while(j<sizeof(buf))
+ buf[j++]=0;
+ }
+ } else {
+ for(j=0;j<sizeof(buf);j++)
+ buf[j]=0;
+ }
+ for(j=0;j<(BYTES_PER_PAGE/MAX_BYTES);j++)
+ if(eeprom_write(d,addr+i,j*MAX_BYTES,buf+(j*MAX_BYTES),MAX_BYTES)<0)
+ exit(1);
+ } else {
+ for(j=0;j<(BYTES_PER_PAGE/MAX_BYTES);j++)
+ if(eeprom_read(d,addr+i,j*MAX_BYTES,buf+(j*MAX_BYTES),MAX_BYTES)<0)
+ exit(1);
+ }
+
+
+ if(!rwmode && f>=0){
+ j=write(f,buf,sizeof(buf));
+ if(j!=sizeof(buf)){
+ fprintf(stderr,"Cannot write to file '%s'\n",fn);
+ perror(fn);
+ exit(1);
+ }
+ }
+
+ }
+
+ if(f>=0)
+ close(f);
+
+ close(d);
+
+ exit(0);
+
+}
--- /dev/null
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <time.h>
+#include <linux/i2c-dev.h>
+
+
+#define MAX_BLK_SIZE 64
+#define EEPROM_SIZE 32768
+#define READ 1
+#define WRITE 0
+#define ERASE 2
+#define PHEADER 3
+#define VER "eepromer v 0.4 (c) Daniel Smolik 2001\n"
+#define HEAD_SIZE sizeof(struct mini_inode)
+#define START_ADDR 0
+#define FORCE 1
+/*
+To disable startup warning #undef WARNINC
+
+
+*/
+
+#define WARNINC
+
+
+int block_write(int file,int dev_addr,int eeprom_addr,unsigned char *buf,int lenght);int block_write(int file,int dev_addr,int eeprom_addr,unsigned char *buf,int lenght);
+int block_read(int file,int dev_addr,int eeprom_addr,unsigned char *buf);
+
+/* block_read read block 64 bytes length and returns actual length of data*/
+void help(void);
+int init(char *device,int addr);
+int content_write(int file, int addr);
+int content_read(int file, int addr);
+int inode_write(int file, int dev_addr, int lenght);
+int inode_read(int file, int dev_addr, void *p_inode);
+void pheader(int file, int addr);
+void erase(int file,int addr,int eeprom_size);
+void made_address(int addr,unsigned char *buf);
+void warn(void);
+void bar(void);
+
+
+static int stav=0;
+
+
+
+static struct mini_inode {
+
+ time_t timestamp;
+ int data_len;
+ char data[56];
+
+ } m_ind,*p_ind;
+
+
+
+void help(void)
+{
+ FILE *fptr;
+ char s[100];
+
+ fprintf(stderr,"Syntax: eepromer [-r|-w|-e|-p] -f /dev/i2c-X ADDRESS \n\n");
+ fprintf(stderr," ADDRESS is address of i2c device eg. 0x51\n");
+
+ if((fptr = fopen("/proc/bus/i2c", "r"))) {
+ fprintf(stderr," Installed I2C busses:\n");
+ while(fgets(s, 100, fptr))
+ fprintf(stderr, " %s", s);
+ fclose(fptr);
+ }
+}
+
+
+
+
+
+int main(int argc, char *argv[]){
+
+ int i, file, addr;
+ int action; //in this variable will be (-r,-w,-e)
+ char device[45];
+ int force;
+
+ p_ind=&m_ind;
+ force=0;
+
+
+
+
+ for(i=1; i < argc;i++){
+
+
+ if(!strcmp("-r",argv[i])) {
+ action=READ;
+ break;
+ }
+ if(!strcmp("-e",argv[i])) {
+ action=ERASE;
+ break;
+ }
+ if(!strcmp("-w",argv[i])) {
+ action=WRITE;
+ break;
+ }
+ if(!strcmp("-p",argv[i])) {
+ action=PHEADER;
+ break;
+ }
+ if(!strcmp("-force",argv[i])) {
+ force=FORCE;
+ break;
+ }
+ if(!strcmp("-v",argv[i])) {
+ fprintf(stderr,VER);
+ exit(0);
+ break;
+ }
+ else {
+
+ fprintf(stderr,"Error: No action specified !\n");
+ help();
+ exit(1);
+ }
+
+ }
+
+
+#ifdef WARNINC
+
+ if(force!=FORCE) warn();
+
+#endif
+
+
+ if(argc < 5) {
+ fprintf(stderr,"Error: No i2c address specified !\n");
+ help();
+ exit(1);
+
+ }
+
+
+ for(i=1; i < argc;i++){
+
+
+ if(!strcmp("-f",argv[i])) {
+ strcpy(device,argv[i+1]);
+ break;
+ }
+
+ }
+
+ if(!strlen(device)) {
+
+ fprintf(stderr,"Error: No device specified !\n");
+ help();
+ exit(1);
+ }
+
+
+ if(! (addr=strtol(argv[4],NULL,16))) {
+
+ fprintf(stderr,"Error: Bad device address !\n");
+ help();
+ exit(1);
+ }
+
+ if(! (file=init(device,addr))){
+
+ fprintf(stderr,"Error: Init failed !\n");
+ exit(1);
+ }
+
+
+ switch(action){
+
+ case READ:
+ content_read(file,addr);
+ break;
+
+ case WRITE:
+ content_write(file,addr);
+ break;
+
+ case ERASE: erase(file,addr,EEPROM_SIZE);
+ break;
+ case PHEADER: pheader(file,addr);
+ break;
+
+ default:
+ fprintf(stderr,"Internal error!\n");
+ exit(1); break;
+
+ }
+
+
+ close(file);
+ exit(0);
+
+}
+
+
+
+/****************************************************************************/
+/* Low level function */
+/* */
+/****************************************************************************/
+
+
+
+
+
+int block_write(int file,int dev_addr,int eeprom_addr,unsigned char *buf,int lenght){
+
+ unsigned char buff[2];
+ struct i2c_msg msg[2];
+
+ struct i2c_ioctl_rdwr_data {
+
+ struct i2c_msg *msgs; /* ptr to array of simple messages */
+ int nmsgs; /* number of messages to exchange */
+ } msgst;
+
+
+
+ if ( lenght > (MAX_BLK_SIZE) ) {
+
+ fprintf(stderr,
+ "Error: Block too large:\n");
+
+ }
+
+
+ //bar();
+
+ made_address(eeprom_addr,buff);
+
+
+ msg[0].addr = dev_addr;
+ msg[0].flags = 0;
+ msg[0].len = 2;
+ msg[0].buf = buff;
+
+
+ msg[1].addr = dev_addr;
+ msg[1].flags = I2C_M_NOSTART;
+ msg[1].len = lenght;
+ msg[1].buf = buf;
+
+
+ msgst.msgs = msg;
+ msgst.nmsgs = 2;
+
+
+ if (ioctl(file,I2C_RDWR,&msgst) < 0){
+
+ fprintf(stderr,
+ "Error: Transaction failed: %s\n",
+ strerror(errno));
+
+ return 1;
+
+ }
+
+ return 0;
+
+}
+
+
+
+
+int block_read(int file,int dev_addr,int eeprom_addr,unsigned char *buf){
+
+ int ln;
+ char buff[2]; //={0x0,0x0};
+
+ struct i2c_msg msg[2];
+
+ struct i2c_ioctl_rdwr_data {
+
+ struct i2c_msg *msgs; /* ptr to array of simple messages */
+ int nmsgs; /* number of messages to exchange */
+ } msgst;
+
+
+
+ made_address(eeprom_addr,buff);
+ ln=0;
+ //bar();
+
+ msg[0].addr = dev_addr;
+ msg[0].flags = 0;
+ msg[0].len = 2;
+ msg[0].buf = buff;
+
+
+ msg[1].addr = dev_addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = MAX_BLK_SIZE;
+ msg[1].buf = buf;
+
+
+
+
+ msgst.msgs = msg;
+ msgst.nmsgs = 2;
+
+
+
+
+ if ((ln = ioctl(file, I2C_RDWR, &msgst)) < 0) {
+
+ fprintf(stderr,
+ "Error: Read error:%d\n",ln);
+ return ln;
+ }
+
+ return ln;
+
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+void made_address(int addr,unsigned char *buf){
+
+ int k;
+
+ //addr = addr & 0xFFFF; /*odstranim nepoterbne bity*/
+
+ k=addr;
+ buf[1]=(unsigned char) (k & 0xFF); //vyrobim druhy byte adresy
+ k=addr & 0xFF00 ;
+ buf[0]= ((unsigned char) (k >> 8)) & 0x7F;
+
+
+ return;
+}
+
+
+int init(char *device,int addr) {
+
+ int file;
+ unsigned long funcs;
+
+ if ((file = open(device,O_RDWR)) < 0) {
+
+ fprintf(stderr,"Error: Could not open file %s\n",
+ device);
+
+ return 0;
+ }
+
+
+ /* check adapter functionality */
+ if (ioctl(file,I2C_FUNCS,&funcs) < 0) {
+ fprintf(stderr,
+ "Error: Could not get the adapter functionality matrix: %s\n",
+ strerror(errno));
+ close(file);
+ return 0;
+ }
+
+ /* The I2C address */
+ if (ioctl(file,I2C_SLAVE,addr) < 0) {
+ /* ERROR HANDLING; you can check errno to see what went wrong */
+ fprintf(stderr,
+ "Error: Cannot communicate with slave: %s\n",
+ strerror(errno));
+
+ close(file);
+ return 0;
+ }
+
+ return file;
+}
+
+
+int content_write(int file, int addr){
+
+ unsigned char buf[MAX_BLK_SIZE];
+ unsigned char pom;
+ int i, j, k, delka, addr_cnt;
+
+ delka=0;
+ addr_cnt=HEAD_SIZE;
+ k=0;
+
+ for(j=0;j<=MAX_BLK_SIZE;j++)buf[j]=0;
+
+
+
+ i=0;
+
+ for(;;) {
+
+ delka=fread(&pom,1,1,stdin);
+
+ if( delka > 0 ){
+ buf[i]=pom;
+ }
+
+ if(i==(MAX_BLK_SIZE-1) || (delka < 1)) {
+
+
+
+ if(block_write(file,addr,addr_cnt,buf,delka<1?i:(i+1)) !=0) {
+
+ fprintf(stderr,"Block write failed\n");
+ return 1;
+
+ }
+ //printf("i:%d\n",i);
+ addr_cnt=addr_cnt + i + (delka==1?1:0); //+i
+
+ for(j=0;j<=MAX_BLK_SIZE;j++)buf[j]=0;
+
+ i=0;
+ if(delka<1) {
+
+ //pisu EOF
+
+
+ if(inode_write(file,addr,(addr_cnt-HEAD_SIZE)) !=0) {
+
+ fprintf(stderr,"Inode write failed\n");
+ return 1;
+
+ }
+ break;
+ }
+
+
+ } else i++;
+
+ }
+
+ return 0;
+
+}
+
+
+int content_read(int file, int addr){
+
+ unsigned char buf[MAX_BLK_SIZE];
+ int i, j, k, delka;
+
+ delka=0;
+ k=0;
+
+
+ inode_read(file,addr,p_ind );
+
+
+ for(i=HEAD_SIZE;i<= (HEAD_SIZE + p_ind->data_len);i=i+MAX_BLK_SIZE ) {
+
+
+ if(block_read(file,addr,i,buf) !=0) {
+
+ fprintf(stderr,"Block read failed\n");
+ return 1;
+
+ }
+
+ if( (HEAD_SIZE + p_ind->data_len - i) < MAX_BLK_SIZE ) {
+ k= HEAD_SIZE + p_ind->data_len - i;
+ }else {
+ k=MAX_BLK_SIZE;
+ }
+
+
+ for(j=0;j<k ;j++){
+
+ putc(buf[j],stdout);
+
+ }
+
+
+ }
+
+ return 0;
+
+}
+
+
+
+void erase(int file, int addr,int eeprom_size){
+
+ unsigned char buf[MAX_BLK_SIZE];
+ int i, j, k, delka;
+
+ delka=0;
+ k=0;
+
+ for(j=0;j<=MAX_BLK_SIZE;j++)buf[j]=0;
+
+
+
+
+
+ for(i=0;i<eeprom_size;i=i+MAX_BLK_SIZE) {
+
+
+ if(block_write(file,addr,i,buf,MAX_BLK_SIZE) !=0) {
+
+ fprintf(stderr,"Block write failed\n");
+ return;
+
+ }
+
+ }
+
+ return;
+
+}
+
+
+
+void bar(void){
+
+
+ if( stav > 70 ) stav=0;
+
+
+ switch(stav) {
+
+
+ case 10: fwrite("\\",1,1,stderr);
+ fflush(stderr);
+ rewind(stderr);
+ break;
+ case 20: fwrite("|",1,1,stderr);
+ fflush(stderr);
+ rewind(stderr);
+ break;
+ case 30: fwrite("/",1,1,stderr);
+ fflush(stderr);
+ rewind(stderr);
+ break;
+ case 40: fwrite("-",1,1,stderr);
+ fflush(stderr);
+ rewind(stderr);
+ break;
+ case 50: fwrite("\\",1,1,stderr);
+ fflush(stderr);
+ rewind(stderr);
+ break;
+ case 60: fwrite("|",1,1,stderr);
+ fflush(stderr);
+ rewind(stderr);
+ break;
+ case 70: fwrite("/",1,1,stderr);
+ fflush(stderr);
+ rewind(stderr);
+ break;
+ }
+ stav++;
+
+}
+
+
+
+
+
+int inode_write(int file,int dev_addr,int lenght){
+
+ unsigned char buff[2];
+ struct i2c_msg msg[2];
+
+ struct i2c_ioctl_rdwr_data {
+
+ struct i2c_msg *msgs; /* ptr to array of simple messages */
+ int nmsgs; /* number of messages to exchange */
+ } msgst;
+
+
+ m_ind.timestamp=time(NULL);
+ m_ind.data_len=lenght;
+
+
+
+
+
+ //bar();
+
+ made_address(START_ADDR,buff);
+
+
+ msg[0].addr = dev_addr;
+ msg[0].flags = 0;
+ msg[0].len = 2;
+ msg[0].buf = buff;
+
+
+ msg[1].addr = dev_addr;
+ msg[1].flags = I2C_M_NOSTART;
+ msg[1].len = sizeof(struct mini_inode);
+ msg[1].buf = (char *) &m_ind;
+
+
+
+ msgst.msgs = msg;
+ msgst.nmsgs = 2;
+
+
+ if (ioctl(file,I2C_RDWR,&msgst) < 0){
+
+ fprintf(stderr,
+ "Error: Transaction failed: %s\n",
+ strerror(errno));
+
+ return 1;
+
+ }
+
+ return 0;
+
+}
+
+
+
+int inode_read(int file,int dev_addr,void *p_inode ){
+
+
+ #define POK 32
+ int ln;
+ char buff[2]; //={0x0,0x0};
+
+ struct i2c_msg msg[2];
+
+ struct i2c_ioctl_rdwr_data {
+
+ struct i2c_msg *msgs; /* ptr to array of simple messages */
+ int nmsgs; /* number of messages to exchange */
+ } msgst;
+
+ made_address(START_ADDR,buff);
+
+ ln=0;
+ //bar();
+
+ msg[0].addr = dev_addr;
+ msg[0].flags = 0;
+ msg[0].len = 2;
+ msg[0].buf = buff;
+
+
+ msg[1].addr = dev_addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = sizeof(struct mini_inode);
+ msg[1].buf = p_inode;
+
+
+
+
+ msgst.msgs = msg;
+ msgst.nmsgs = 2;
+
+
+ if ((ln = ioctl(file, I2C_RDWR, &msgst)) < 0) {
+
+ fprintf(stderr,
+ "Error: Read error:%d\n",ln);
+ return ln;
+ }
+
+
+
+ return ln;
+
+}
+
+
+void pheader(int file,int dev_addr){
+
+ struct tm *p_tm;
+ char time_buf[15],*p_buf;
+
+ p_buf=time_buf;
+ inode_read(file,dev_addr,p_ind );
+ p_tm=localtime(&p_ind->timestamp);
+ strftime(p_buf,sizeof(time_buf),"%Y%m%d%H%M%S",p_tm);
+ printf("LEN=%d,TIME=%s\n",p_ind->data_len,p_buf);
+ return;
+}
+
+
+
+
+#ifdef WARNINC
+void warn(void)
+{
+
+ fprintf(stderr,"\n\n!!!!!!!!!!!!!!!!!!!!!WARNING!!!!!!!!!!!!!!!!!!!!!\n");
+ fprintf(stderr,"This program is intended for use on eeproms\nusing external busses such as i2c-pport.\n");
+ fprintf(stderr,"Do not use this on your SDRAM DIMM EEPROMS\nunless you REALLY REALLY know what you are\ndoing!!! Doing so will render your SDRAM\nUSELESS and leave your system UNBOOTABLE!!!\n");
+ fprintf(stderr,"To disable this warning use -force\n");
+ fprintf(stderr,"\n\nPress ENTER to continue or hit Control-C NOW !!!!\n\n\n");
+
+ getchar();
+}
+#endif
--- /dev/null
+# Linux I2C header files
+#
+# Copyright (C) 2007 Jean Delvare <khali@linux-fr.org>
+#
+# Licensed under the GNU General Public License.
+
+INCLUDE_DIR := include
+
+INCLUDE_TARGETS := linux/i2c-dev.h
+
+#
+# Commands
+#
+
+install-include: $(addprefix $(INCLUDE_DIR)/,$(INCLUDE_TARGETS))
+ $(INSTALL_DIR) $(DESTDIR)$(incdir)/linux
+ for file in $(INCLUDE_TARGETS) ; do \
+ $(INSTALL_DATA) $(INCLUDE_DIR)/$$file $(DESTDIR)$(incdir)/$$file ; done
+
+uninstall-include:
+ for file in $(INCLUDE_TARGETS) ; do \
+ $(RM) $(DESTDIR)$(incdir)/$$file ; done
+
+install: install-include
+
+uninstall: uninstall-include
--- /dev/null
+/*
+ i2c-dev.h - i2c-bus driver, char device interface
+
+ Copyright (C) 1995-97 Simon G. Vogl
+ Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
+
+ 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+ MA 02110-1301 USA.
+*/
+
+/* $Id: i2c-dev.h 5361 2008-10-19 09:47:02Z khali $ */
+
+#ifndef LIB_I2CDEV_H
+#define LIB_I2CDEV_H
+
+#include <linux/types.h>
+#include <sys/ioctl.h>
+
+
+/* -- i2c.h -- */
+
+
+/*
+ * I2C Message - used for pure i2c transaction, also from /dev interface
+ */
+struct i2c_msg {
+ __u16 addr; /* slave address */
+ unsigned short flags;
+#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
+#define I2C_M_RD 0x01
+#define I2C_M_NOSTART 0x4000
+#define I2C_M_REV_DIR_ADDR 0x2000
+#define I2C_M_IGNORE_NAK 0x1000
+#define I2C_M_NO_RD_ACK 0x0800
+ short len; /* msg length */
+ char *buf; /* pointer to msg data */
+};
+
+/* To determine what functionality is present */
+
+#define I2C_FUNC_I2C 0x00000001
+#define I2C_FUNC_10BIT_ADDR 0x00000002
+#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
+#define I2C_FUNC_SMBUS_PEC 0x00000008
+#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_QUICK 0x00010000
+#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
+#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
+#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
+#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
+#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
+#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
+#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
+#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
+#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
+#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
+#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
+
+#define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
+ I2C_FUNC_SMBUS_WRITE_BYTE)
+#define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
+ I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
+#define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
+ I2C_FUNC_SMBUS_WRITE_WORD_DATA)
+#define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
+ I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
+#define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
+ I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
+
+/* Old name, for compatibility */
+#define I2C_FUNC_SMBUS_HWPEC_CALC I2C_FUNC_SMBUS_PEC
+
+/*
+ * Data for SMBus Messages
+ */
+#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
+#define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
+union i2c_smbus_data {
+ __u8 byte;
+ __u16 word;
+ __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */
+ /* and one more for PEC */
+};
+
+/* smbus_access read or write markers */
+#define I2C_SMBUS_READ 1
+#define I2C_SMBUS_WRITE 0
+
+/* SMBus transaction types (size parameter in the above functions)
+ Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
+#define I2C_SMBUS_QUICK 0
+#define I2C_SMBUS_BYTE 1
+#define I2C_SMBUS_BYTE_DATA 2
+#define I2C_SMBUS_WORD_DATA 3
+#define I2C_SMBUS_PROC_CALL 4
+#define I2C_SMBUS_BLOCK_DATA 5
+#define I2C_SMBUS_I2C_BLOCK_BROKEN 6
+#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
+#define I2C_SMBUS_I2C_BLOCK_DATA 8
+
+
+/* ----- commands for the ioctl like i2c_command call:
+ * note that additional calls are defined in the algorithm and hw
+ * dependent layers - these can be listed here, or see the
+ * corresponding header files.
+ */
+ /* -> bit-adapter specific ioctls */
+#define I2C_RETRIES 0x0701 /* number of times a device address */
+ /* should be polled when not */
+ /* acknowledging */
+#define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
+
+
+/* this is for i2c-dev.c */
+#define I2C_SLAVE 0x0703 /* Change slave address */
+ /* Attn.: Slave address is 7 or 10 bits */
+#define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
+ /* Attn.: Slave address is 7 or 10 bits */
+ /* This changes the address, even if it */
+ /* is already taken! */
+#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
+
+#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
+#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
+#define I2C_PEC 0x0708 /* != 0 for SMBus PEC */
+
+#define I2C_SMBUS 0x0720 /* SMBus-level access */
+
+/* -- i2c.h -- */
+
+
+/* Note: 10-bit addresses are NOT supported! */
+
+/* This is the structure as used in the I2C_SMBUS ioctl call */
+struct i2c_smbus_ioctl_data {
+ char read_write;
+ __u8 command;
+ int size;
+ union i2c_smbus_data *data;
+};
+
+/* This is the structure as used in the I2C_RDWR ioctl call */
+struct i2c_rdwr_ioctl_data {
+ struct i2c_msg *msgs; /* pointers to i2c_msgs */
+ int nmsgs; /* number of i2c_msgs */
+};
+
+
+static inline __s32 i2c_smbus_access(int file, char read_write, __u8 command,
+ int size, union i2c_smbus_data *data)
+{
+ struct i2c_smbus_ioctl_data args;
+
+ args.read_write = read_write;
+ args.command = command;
+ args.size = size;
+ args.data = data;
+ return ioctl(file,I2C_SMBUS,&args);
+}
+
+
+static inline __s32 i2c_smbus_write_quick(int file, __u8 value)
+{
+ return i2c_smbus_access(file,value,0,I2C_SMBUS_QUICK,NULL);
+}
+
+static inline __s32 i2c_smbus_read_byte(int file)
+{
+ union i2c_smbus_data data;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,0,I2C_SMBUS_BYTE,&data))
+ return -1;
+ else
+ return 0x0FF & data.byte;
+}
+
+static inline __s32 i2c_smbus_write_byte(int file, __u8 value)
+{
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,value,
+ I2C_SMBUS_BYTE,NULL);
+}
+
+static inline __s32 i2c_smbus_read_byte_data(int file, __u8 command)
+{
+ union i2c_smbus_data data;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
+ I2C_SMBUS_BYTE_DATA,&data))
+ return -1;
+ else
+ return 0x0FF & data.byte;
+}
+
+static inline __s32 i2c_smbus_write_byte_data(int file, __u8 command,
+ __u8 value)
+{
+ union i2c_smbus_data data;
+ data.byte = value;
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_BYTE_DATA, &data);
+}
+
+static inline __s32 i2c_smbus_read_word_data(int file, __u8 command)
+{
+ union i2c_smbus_data data;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
+ I2C_SMBUS_WORD_DATA,&data))
+ return -1;
+ else
+ return 0x0FFFF & data.word;
+}
+
+static inline __s32 i2c_smbus_write_word_data(int file, __u8 command,
+ __u16 value)
+{
+ union i2c_smbus_data data;
+ data.word = value;
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_WORD_DATA, &data);
+}
+
+static inline __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value)
+{
+ union i2c_smbus_data data;
+ data.word = value;
+ if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_PROC_CALL,&data))
+ return -1;
+ else
+ return 0x0FFFF & data.word;
+}
+
+
+/* Returns the number of read bytes */
+static inline __s32 i2c_smbus_read_block_data(int file, __u8 command,
+ __u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
+ I2C_SMBUS_BLOCK_DATA,&data))
+ return -1;
+ else {
+ for (i = 1; i <= data.block[0]; i++)
+ values[i-1] = data.block[i];
+ return data.block[0];
+ }
+}
+
+static inline __s32 i2c_smbus_write_block_data(int file, __u8 command,
+ __u8 length, __u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+ if (length > 32)
+ length = 32;
+ for (i = 1; i <= length; i++)
+ data.block[i] = values[i-1];
+ data.block[0] = length;
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_BLOCK_DATA, &data);
+}
+
+/* Returns the number of read bytes */
+/* Until kernel 2.6.22, the length is hardcoded to 32 bytes. If you
+ ask for less than 32 bytes, your code will only work with kernels
+ 2.6.23 and later. */
+static inline __s32 i2c_smbus_read_i2c_block_data(int file, __u8 command,
+ __u8 length, __u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+
+ if (length > 32)
+ length = 32;
+ data.block[0] = length;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
+ length == 32 ? I2C_SMBUS_I2C_BLOCK_BROKEN :
+ I2C_SMBUS_I2C_BLOCK_DATA,&data))
+ return -1;
+ else {
+ for (i = 1; i <= data.block[0]; i++)
+ values[i-1] = data.block[i];
+ return data.block[0];
+ }
+}
+
+static inline __s32 i2c_smbus_write_i2c_block_data(int file, __u8 command,
+ __u8 length, __u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+ if (length > 32)
+ length = 32;
+ for (i = 1; i <= length; i++)
+ data.block[i] = values[i-1];
+ data.block[0] = length;
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_I2C_BLOCK_BROKEN, &data);
+}
+
+/* Returns the number of read bytes */
+static inline __s32 i2c_smbus_block_process_call(int file, __u8 command,
+ __u8 length, __u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+ if (length > 32)
+ length = 32;
+ for (i = 1; i <= length; i++)
+ data.block[i] = values[i-1];
+ data.block[0] = length;
+ if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_BLOCK_PROC_CALL,&data))
+ return -1;
+ else {
+ for (i = 1; i <= data.block[0]; i++)
+ values[i-1] = data.block[i];
+ return data.block[0];
+ }
+}
+
+
+#endif /* LIB_I2CDEV_H */
--- /dev/null
+* Mon Mar 22 2010 Marko Saukko <marko.saukko@gmail.com> - 3.0.2-1
+- Moved /usr/include/linux/i2c-dev.h to /usr/include/libi2c/i2c-dev.h
+ because of conflicts with kernel packages.
+
+* Mon Mar 22 2010 Marko Saukko <marko.saukko@gmail.com> - 3.0.2
+- Initial spec file.
--- /dev/null
+Name: i2c-tools
+Version: 3.0.2
+Release: 1
+Summary: Heterogeneous set of I2C tools for Linux
+Group: System/Libraries
+License: GPLv2+
+Source0: http://dl.lm-sensors.org/i2c-tools/releases/%{name}-%{version}.tar.bz2
+# Patches auto-generated by git-buildpackage:
+
+%description
+This package contains a heterogeneous set of I2C tools for Linux: a bus
+probing tool, a chip dumper, register-level access helpers, EEPROM
+decoding scripts, and more.
+
+%package -n libi2c-devel
+Summary: Userspace I2C programming library development files
+
+%description -n libi2c-devel
+I2C devices are usually controlled by a kernel driver. Using this
+library it is also possible to access all devices on an adapter
+from userspace and without the knowledge of Linux kernel internals.
+
+%prep
+%setup -q -n %{name}-%{version}
+
+%build
+make prefix=%{_prefix}
+
+%install
+make install DESTDIR=$RPM_BUILD_ROOT prefix=%{_prefix}
+
+# To avoid conflicts with kernel package lets move this header to
+# different directory.
+mkdir -p $RPM_BUILD_ROOT%{_includedir}/libi2c
+mv $RPM_BUILD_ROOT%{_includedir}/linux/i2c-dev.h $RPM_BUILD_ROOT%{_includedir}/libi2c/
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%files
+%defattr(-,root,root,-)
+%doc COPYING
+%{_bindir}/*
+%{_sbindir}/*
+%{_mandir}/man8/*
+
+%files -n libi2c-devel
+%defattr(-,root,root,-)
+%doc COPYING
+%{_includedir}/libi2c/i2c-dev.h
--- /dev/null
+
+README: py-smbus
+
+Prerequisites:
+Be sure to build and install the lm-sensors userspace first. This package
+requires one of the header files from that.
+
+To build:
+ $ python setup.py build
+
+To install (will also build if necessary):
+ $ python setup.py install
+
+For general build/install help:
+ $ python setup.py --help-commands
+
+Frequently Answered Question:
+
+Q: It's throwing exceptions, nothing works, what's wrong?
+
+ A1: You need write permissions to the i2c-dev devices. Try running as root.
+
+ A2: Addresses in Linux/I2C are the most-sig 7 bits, right-justified. E.g.
+ if your device uses address 0xc0 to write and 0xc1 to read, then use
+ address 0x60 with this module.
+
+ A3: Some other kernel driver has claimed that I2C address. Unload it first.
+
--- /dev/null
+#!/usr/bin/env python
+
+from distutils.core import setup, Extension
+
+setup( name="smbus",
+ version="1.1",
+ description="Python bindings for Linux SMBus access through i2c-dev",
+ author="Mark M. Hoffman",
+ author_email="mhoffman@lightlink.com",
+ maintainer="Mark M. Hoffman",
+ maintainer_email="lm-sensors@lm-sensors.org",
+ license="GPLv2",
+ url="http://lm-sensors.org/",
+ ext_modules=[Extension("smbus", ["smbusmodule.c"])])
--- /dev/null
+/*
+ * smbusmodule.c - Python bindings for Linux SMBus access through i2c-dev
+ * Copyright (C) 2005-2007 Mark M. Hoffman <mhoffman@lightlink.com>
+ *
+ * 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.
+ */
+
+#include <Python.h>
+#include "structmember.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <linux/i2c-dev.h>
+
+/*
+** These are required to build this module against Linux older than 2.6.23.
+*/
+#ifndef I2C_SMBUS_I2C_BLOCK_BROKEN
+#undef I2C_SMBUS_I2C_BLOCK_DATA
+#define I2C_SMBUS_I2C_BLOCK_BROKEN 6
+#define I2C_SMBUS_I2C_BLOCK_DATA 8
+#endif
+
+PyDoc_STRVAR(SMBus_module_doc,
+ "This module defines an object type that allows SMBus transactions\n"
+ "on Linux hosts. The host kernel must have I2C support, I2C device\n"
+ "interface support, and a bus adapter driver. All of these can be\n"
+ "either built-in to the kernel, or loaded from modules.\n"
+ "\n"
+ "Because the I2C device interface is opened R/W, users of this\n"
+ "module usually must have root permissions.\n");
+
+typedef struct {
+ PyObject_HEAD
+
+ int fd; /* open file descriptor: /dev/i2c-?, or -1 */
+ int addr; /* current client SMBus address */
+ int pec; /* !0 => Packet Error Codes enabled */
+} SMBus;
+
+static PyObject *
+SMBus_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+ SMBus *self;
+
+ if ((self = (SMBus *)type->tp_alloc(type, 0)) == NULL)
+ return NULL;
+
+ self->fd = -1;
+ self->addr = -1;
+ self->pec = 0;
+
+ return (PyObject *)self;
+}
+
+PyDoc_STRVAR(SMBus_close_doc,
+ "close()\n\n"
+ "Disconnects the object from the bus.\n");
+
+static PyObject *
+SMBus_close(SMBus *self)
+{
+ if ((self->fd != -1) && (close(self->fd) == -1)) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ self->fd = -1;
+ self->addr = -1;
+ self->pec = 0;
+
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+static void
+SMBus_dealloc(SMBus *self)
+{
+ PyObject *ref = SMBus_close(self);
+ Py_XDECREF(ref);
+
+ self->ob_type->tp_free((PyObject *)self);
+}
+
+#define MAXPATH 16
+
+PyDoc_STRVAR(SMBus_open_doc,
+ "open(bus)\n\n"
+ "Connects the object to the specified SMBus.\n");
+
+static PyObject *
+SMBus_open(SMBus *self, PyObject *args, PyObject *kwds)
+{
+ int bus;
+ char path[MAXPATH];
+
+ static char *kwlist[] = {"bus", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "i:open", kwlist, &bus))
+ return NULL;
+
+ if (snprintf(path, MAXPATH, "/dev/i2c-%d", bus) >= MAXPATH) {
+ PyErr_SetString(PyExc_OverflowError,
+ "Bus number is invalid.");
+ return NULL;
+ }
+
+ if ((self->fd = open(path, O_RDWR, 0)) == -1) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+static int
+SMBus_init(SMBus *self, PyObject *args, PyObject *kwds)
+{
+ int bus = -1;
+
+ static char *kwlist[] = {"bus", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "|i:__init__",
+ kwlist, &bus))
+ return -1;
+
+ if (bus >= 0) {
+ SMBus_open(self, args, kwds);
+ if (PyErr_Occurred())
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * private helper function, 0 => success, !0 => error
+ */
+static int
+SMBus_set_addr(SMBus *self, int addr)
+{
+ int ret = 0;
+
+ if (self->addr != addr) {
+ ret = ioctl(self->fd, I2C_SLAVE, addr);
+ self->addr = addr;
+ }
+
+ return ret;
+}
+
+#define SMBus_SET_ADDR(self, addr) do { \
+ if (SMBus_set_addr(self, addr)) { \
+ PyErr_SetFromErrno(PyExc_IOError); \
+ return NULL; \
+ } \
+} while(0)
+
+PyDoc_STRVAR(SMBus_write_quick_doc,
+ "write_quick(addr)\n\n"
+ "Perform SMBus Quick transaction.\n");
+
+static PyObject *
+SMBus_write_quick(SMBus *self, PyObject *args)
+{
+ int addr;
+ __s32 result;
+
+ if (!PyArg_ParseTuple(args, "i:write_quick", &addr))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ if ((result = i2c_smbus_write_quick(self->fd, I2C_SMBUS_WRITE))) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+PyDoc_STRVAR(SMBus_read_byte_doc,
+ "read_byte(addr) -> result\n\n"
+ "Perform SMBus Read Byte transaction.\n");
+
+static PyObject *
+SMBus_read_byte(SMBus *self, PyObject *args)
+{
+ int addr;
+ __s32 result;
+
+ if (!PyArg_ParseTuple(args, "i:read_byte", &addr))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ if ((result = i2c_smbus_read_byte(self->fd)) == -1) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ return Py_BuildValue("l", (long)result);
+}
+
+PyDoc_STRVAR(SMBus_write_byte_doc,
+ "write_byte(addr, val)\n\n"
+ "Perform SMBus Write Byte transaction.\n");
+
+static PyObject *
+SMBus_write_byte(SMBus *self, PyObject *args)
+{
+ int addr, val;
+ __s32 result;
+
+ if (!PyArg_ParseTuple(args, "ii:write_byte", &addr, &val))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ if ((result = i2c_smbus_write_byte(self->fd, (__u8)val)) == -1) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+PyDoc_STRVAR(SMBus_read_byte_data_doc,
+ "read_byte_data(addr, cmd) -> result\n\n"
+ "Perform SMBus Read Byte Data transaction.\n");
+
+static PyObject *
+SMBus_read_byte_data(SMBus *self, PyObject *args)
+{
+ int addr, cmd;
+ __s32 result;
+
+ if (!PyArg_ParseTuple(args, "ii:read_byte_data", &addr, &cmd))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ if ((result = i2c_smbus_read_byte_data(self->fd, (__u8)cmd)) == -1) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ return Py_BuildValue("l", (long)result);
+}
+
+PyDoc_STRVAR(SMBus_write_byte_data_doc,
+ "write_byte_data(addr, cmd, val)\n\n"
+ "Perform SMBus Write Byte Data transaction.\n");
+
+static PyObject *
+SMBus_write_byte_data(SMBus *self, PyObject *args)
+{
+ int addr, cmd, val;
+ __s32 result;
+
+ if (!PyArg_ParseTuple(args, "iii:write_byte_data", &addr, &cmd, &val))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ if ((result = i2c_smbus_write_byte_data(self->fd,
+ (__u8)cmd, (__u8)val)) == -1) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+PyDoc_STRVAR(SMBus_read_word_data_doc,
+ "read_word_data(addr, cmd) -> result\n\n"
+ "Perform SMBus Read Word Data transaction.\n");
+
+static PyObject *
+SMBus_read_word_data(SMBus *self, PyObject *args)
+{
+ int addr, cmd;
+ __s32 result;
+
+ if (!PyArg_ParseTuple(args, "ii:read_word_data", &addr, &cmd))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ if ((result = i2c_smbus_read_word_data(self->fd, (__u8)cmd)) == -1) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ return Py_BuildValue("l", (long)result);
+}
+
+PyDoc_STRVAR(SMBus_write_word_data_doc,
+ "write_word_data(addr, cmd, val)\n\n"
+ "Perform SMBus Write Word Data transaction.\n");
+
+static PyObject *
+SMBus_write_word_data(SMBus *self, PyObject *args)
+{
+ int addr, cmd, val;
+ __s32 result;
+
+ if (!PyArg_ParseTuple(args, "iii:write_word_data", &addr, &cmd, &val))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ if ((result = i2c_smbus_write_word_data(self->fd,
+ (__u8)cmd, (__u16)val)) == -1) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+PyDoc_STRVAR(SMBus_process_call_doc,
+ "process_call(addr, cmd, val)\n\n"
+ "Perform SMBus Process Call transaction.\n");
+
+static PyObject *
+SMBus_process_call(SMBus *self, PyObject *args)
+{
+ int addr, cmd, val;
+ __s32 result;
+
+ if (!PyArg_ParseTuple(args, "iii:process_call", &addr, &cmd, &val))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ if ((result = i2c_smbus_process_call(self->fd,
+ (__u8)cmd, (__u16)val)) == -1) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+/*
+ * private helper function; returns a new list of integers
+ */
+static PyObject *
+SMBus_buf_to_list(__u8 const *buf, int len)
+{
+ PyObject *list = PyList_New(len);
+ int ii;
+
+ if (list == NULL)
+ return NULL;
+
+ for (ii = 0; ii < len; ii++) {
+ PyObject *val = Py_BuildValue("l", (long)buf[ii]);
+ PyList_SET_ITEM(list, ii, val);
+ }
+ return list;
+}
+
+PyDoc_STRVAR(SMBus_read_block_data_doc,
+ "read_block_data(addr, cmd) -> results\n\n"
+ "Perform SMBus Read Block Data transaction.\n");
+
+static PyObject *
+SMBus_read_block_data(SMBus *self, PyObject *args)
+{
+ int addr, cmd;
+ union i2c_smbus_data data;
+
+ if (!PyArg_ParseTuple(args, "ii:read_block_data", &addr, &cmd))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ /* save a bit of code by calling the access function directly */
+ if (i2c_smbus_access(self->fd, I2C_SMBUS_READ, (__u8)cmd,
+ I2C_SMBUS_BLOCK_DATA, &data)) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ /* first byte of the block contains (remaining) data length */
+ return SMBus_buf_to_list(&data.block[1], data.block[0]);
+}
+
+/*
+ * private helper function: convert an integer list to union i2c_smbus_data
+ */
+static int
+SMBus_list_to_data(PyObject *list, union i2c_smbus_data *data)
+{
+ static char *msg = "Third argument must be a list of at least one, "
+ "but not more than 32 integers";
+ int ii, len;
+
+ if (!PyList_Check(list)) {
+ PyErr_SetString(PyExc_TypeError, msg);
+ return 0; /* fail */
+ }
+
+ if ((len = PyList_GET_SIZE(list)) > 32) {
+ PyErr_SetString(PyExc_OverflowError, msg);
+ return 0; /* fail */
+ }
+
+ /* first byte is the length */
+ data->block[0] = (__u8)len;
+
+ for (ii = 0; ii < len; ii++) {
+ PyObject *val = PyList_GET_ITEM(list, ii);
+ if (!PyInt_Check(val)) {
+ PyErr_SetString(PyExc_TypeError, msg);
+ return 0; /* fail */
+ }
+ data->block[ii+1] = (__u8)PyInt_AS_LONG(val);
+ }
+
+ return 1; /* success */
+}
+
+PyDoc_STRVAR(SMBus_write_block_data_doc,
+ "write_block_data(addr, cmd, [vals])\n\n"
+ "Perform SMBus Write Block Data transaction.\n");
+
+static PyObject *
+SMBus_write_block_data(SMBus *self, PyObject *args)
+{
+ int addr, cmd;
+ union i2c_smbus_data data;
+
+ if (!PyArg_ParseTuple(args, "iiO&:write_block_data", &addr, &cmd,
+ SMBus_list_to_data, &data))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ /* save a bit of code by calling the access function directly */
+ if (i2c_smbus_access(self->fd, I2C_SMBUS_WRITE, (__u8)cmd,
+ I2C_SMBUS_BLOCK_DATA, &data)) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+PyDoc_STRVAR(SMBus_block_process_call_doc,
+ "block_process_call(addr, cmd, [vals]) -> results\n\n"
+ "Perform SMBus Block Process Call transaction.\n");
+
+static PyObject *
+SMBus_block_process_call(SMBus *self, PyObject *args)
+{
+ int addr, cmd;
+ union i2c_smbus_data data;
+
+ if (!PyArg_ParseTuple(args, "iiO&:block_process_call", &addr, &cmd,
+ SMBus_list_to_data, &data))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ /* save a bit of code by calling the access function directly */
+ if (i2c_smbus_access(self->fd, I2C_SMBUS_WRITE, (__u8)cmd,
+ I2C_SMBUS_BLOCK_PROC_CALL, &data)) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ /* first byte of the block contains (remaining) data length */
+ return SMBus_buf_to_list(&data.block[1], data.block[0]);
+}
+
+PyDoc_STRVAR(SMBus_read_i2c_block_data_doc,
+ "read_i2c_block_data(addr, cmd, len=32) -> results\n\n"
+ "Perform I2C Block Read transaction.\n");
+
+static PyObject *
+SMBus_read_i2c_block_data(SMBus *self, PyObject *args)
+{
+ int addr, cmd, len=32;
+ union i2c_smbus_data data;
+
+ if (!PyArg_ParseTuple(args, "ii|i:read_i2c_block_data", &addr, &cmd,
+ &len))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ data.block[0] = len;
+ /* save a bit of code by calling the access function directly */
+ if (i2c_smbus_access(self->fd, I2C_SMBUS_READ, (__u8)cmd,
+ len == 32 ? I2C_SMBUS_I2C_BLOCK_BROKEN:
+ I2C_SMBUS_I2C_BLOCK_DATA, &data)) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ /* first byte of the block contains (remaining) data length */
+ return SMBus_buf_to_list(&data.block[1], data.block[0]);
+}
+
+PyDoc_STRVAR(SMBus_write_i2c_block_data_doc,
+ "write_i2c_block_data(addr, cmd, [vals])\n\n"
+ "Perform I2C Block Write transaction.\n");
+
+static PyObject *
+SMBus_write_i2c_block_data(SMBus *self, PyObject *args)
+{
+ int addr, cmd;
+ union i2c_smbus_data data;
+
+ if (!PyArg_ParseTuple(args, "iiO&:write_i2c_block_data", &addr, &cmd,
+ SMBus_list_to_data, &data))
+ return NULL;
+
+ SMBus_SET_ADDR(self, addr);
+
+ /* save a bit of code by calling the access function directly */
+ if (i2c_smbus_access(self->fd, I2C_SMBUS_WRITE, (__u8)cmd,
+ I2C_SMBUS_I2C_BLOCK_BROKEN, &data)) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return NULL;
+ }
+
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+PyDoc_STRVAR(SMBus_type_doc,
+ "SMBus([bus]) -> SMBus\n\n"
+ "Return a new SMBus object that is (optionally) connected to the\n"
+ "specified I2C device interface.\n");
+
+static PyMethodDef SMBus_methods[] = {
+ {"open", (PyCFunction)SMBus_open, METH_VARARGS | METH_KEYWORDS,
+ SMBus_open_doc},
+ {"close", (PyCFunction)SMBus_close, METH_NOARGS,
+ SMBus_close_doc},
+ {"write_quick", (PyCFunction)SMBus_write_quick, METH_VARARGS,
+ SMBus_write_quick_doc},
+ {"read_byte", (PyCFunction)SMBus_read_byte, METH_VARARGS,
+ SMBus_read_byte_doc},
+ {"write_byte", (PyCFunction)SMBus_write_byte, METH_VARARGS,
+ SMBus_write_byte_doc},
+ {"read_byte_data", (PyCFunction)SMBus_read_byte_data, METH_VARARGS,
+ SMBus_read_byte_data_doc},
+ {"write_byte_data", (PyCFunction)SMBus_write_byte_data, METH_VARARGS,
+ SMBus_write_byte_data_doc},
+ {"read_word_data", (PyCFunction)SMBus_read_word_data, METH_VARARGS,
+ SMBus_read_word_data_doc},
+ {"write_word_data", (PyCFunction)SMBus_write_word_data, METH_VARARGS,
+ SMBus_write_word_data_doc},
+ {"process_call", (PyCFunction)SMBus_process_call, METH_VARARGS,
+ SMBus_process_call_doc},
+ {"read_block_data", (PyCFunction)SMBus_read_block_data, METH_VARARGS,
+ SMBus_read_block_data_doc},
+ {"write_block_data", (PyCFunction)SMBus_write_block_data, METH_VARARGS,
+ SMBus_write_block_data_doc},
+ {"block_process_call", (PyCFunction)SMBus_block_process_call,
+ METH_VARARGS, SMBus_block_process_call_doc},
+ {"read_i2c_block_data", (PyCFunction)SMBus_read_i2c_block_data,
+ METH_VARARGS, SMBus_read_i2c_block_data_doc},
+ {"write_i2c_block_data", (PyCFunction)SMBus_write_i2c_block_data,
+ METH_VARARGS, SMBus_write_i2c_block_data_doc},
+ {NULL},
+};
+
+static PyObject *
+SMBus_get_pec(SMBus *self, void *closure)
+{
+ PyObject *result = self->pec ? Py_True : Py_False;
+ Py_INCREF(result);
+ return result;
+}
+
+static int
+SMBus_set_pec(SMBus *self, PyObject *val, void *closure)
+{
+ int pec;
+
+ pec = PyObject_IsTrue(val);
+
+ if (val == NULL) {
+ PyErr_SetString(PyExc_TypeError,
+ "Cannot delete attribute");
+ return -1;
+ }
+ else if (pec == -1) {
+ PyErr_SetString(PyExc_TypeError,
+ "The pec attribute must be a boolean.");
+ return -1;
+ }
+
+ if (self->pec != pec) {
+ if (ioctl(self->fd, I2C_PEC, pec)) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ return -1;
+ }
+ self->pec = pec;
+ }
+
+ return 0;
+}
+
+static PyGetSetDef SMBus_getset[] = {
+ {"pec", (getter)SMBus_get_pec, (setter)SMBus_set_pec,
+ "True if Packet Error Codes (PEC) are enabled"},
+ {NULL},
+};
+
+static PyTypeObject SMBus_type = {
+ PyObject_HEAD_INIT(NULL)
+ 0, /* ob_size */
+ "SMBus", /* tp_name */
+ sizeof(SMBus), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ (destructor)SMBus_dealloc, /* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_compare */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT, /* tp_flags */
+ SMBus_type_doc, /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ SMBus_methods, /* tp_methods */
+ 0, /* tp_members */
+ SMBus_getset, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ (initproc)SMBus_init, /* tp_init */
+ 0, /* tp_alloc */
+ SMBus_new, /* tp_new */
+};
+
+static PyMethodDef SMBus_module_methods[] = {
+ {NULL}
+};
+
+#ifndef PyMODINIT_FUNC /* declarations for DLL import/export */
+#define PyMODINIT_FUNC void
+#endif
+PyMODINIT_FUNC
+initsmbus(void)
+{
+ PyObject* m;
+
+ if (PyType_Ready(&SMBus_type) < 0)
+ return;
+
+ m = Py_InitModule3("smbus", SMBus_module_methods, SMBus_module_doc);
+
+ Py_INCREF(&SMBus_type);
+ PyModule_AddObject(m, "SMBus", (PyObject *)&SMBus_type);
+}
+
--- /dev/null
+# Helper for the Linux i2c-stub bus driver
+#
+# Copyright (C) 2007-2008 Jean Delvare <khali@linux-fr.org>
+#
+# Licensed under the GNU General Public License.
+
+STUB_DIR := stub
+
+#
+# Commands
+#
+
+install-stub: $(STUB_DIR)/i2c-stub-from-dump
+ $(INSTALL_DIR) $(DESTDIR)$(sbindir) $(DESTDIR)$(man8dir)
+ $(INSTALL_PROGRAM) $(STUB_DIR)/i2c-stub-from-dump $(DESTDIR)$(sbindir)
+ $(INSTALL_DATA) $(STUB_DIR)/i2c-stub-from-dump.8 $(DESTDIR)$(man8dir)
+
+uninstall-stub:
+ $(RM) $(DESTDIR)$(sbindir)/i2c-stub-from-dump
+ $(RM) $(DESTDIR)$(man8dir)/i2c-stub-from-dump.8
+
+install: install-stub
+
+uninstall: uninstall-stub
--- /dev/null
+#!/usr/bin/perl -w
+#
+# Copyright (C) 2007-2008 Jean Delvare <khali@linux-fr.org>
+#
+# 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301, USA
+#
+# This script feeds the i2c-stub driver with dump data from a real
+# I2C or SMBus chip. This can be useful when writing a driver for
+# a device you do not have access to, but of which you have a dump.
+
+use strict;
+use vars qw($bus_nr $addr $bytes $words $err);
+
+# Kernel version detection code by Mark M. Hoffman,
+# copied from sensors-detect.
+use vars qw(@kernel_version);
+
+sub initialize_kernel_version
+{
+ `uname -r` =~ /(\d+)\.(\d+)\.(\d+)(.*)/;
+ @kernel_version = ($1, $2, $3, $4);
+}
+
+sub kernel_version_at_least
+{
+ my ($vers, $plvl, $slvl) = @_;
+ return 1 if ($kernel_version[0] > $vers ||
+ ($kernel_version[0] == $vers &&
+ ($kernel_version[1] > $plvl ||
+ ($kernel_version[1] == $plvl &&
+ ($kernel_version[2] >= $slvl)))));
+ return 0;
+}
+
+# Find out the i2c bus number of i2c-stub
+sub get_i2c_stub_bus_number
+{
+ my $nr;
+
+ open(FH, "i2cdetect -l |") || die "Can't run i2cdetect";
+ while (<FH>) {
+ next unless m/^i2c-(\d+).*\tSMBus stub/;
+ $nr = $1;
+ last;
+ }
+ close(FH);
+
+ return $nr;
+}
+
+# Load the required kernel drivers if needed
+sub load_kernel_drivers
+{
+ local $_;
+ my $addr = oct shift;
+ my $nr;
+
+ # Maybe everything is already loaded
+ $nr = get_i2c_stub_bus_number();
+ if (defined $nr) {
+ if (kernel_version_at_least(2, 6, 19)) {
+ # Check if the chip address we need is there
+ open(CHIP_ADDR, "/sys/module/i2c_stub/parameters/chip_addr");
+ $_ = <CHIP_ADDR>;
+ chomp;
+ my @stub_addr = split ',';
+ close(CHIP_ADDR);
+
+ foreach (@stub_addr) {
+ return $nr if $addr == $_;
+ }
+ printf STDERR "i2c-stub already loaded without support for address 0x%02x\n", $addr;
+ exit 2;
+ }
+ return $nr;
+ }
+
+ system("/sbin/modprobe", "i2c-dev") == 0 || exit 1;
+ if (kernel_version_at_least(2, 6, 19)) {
+ system("/sbin/modprobe", "i2c-stub", "chip_addr=$addr") == 0 || exit 1;
+ } else {
+ system("/sbin/modprobe", "i2c-stub") == 0 || exit 1;
+ }
+ sleep(1); # udev may take some time to create the device node
+
+ $nr = get_i2c_stub_bus_number();
+ if (!defined($nr)) {
+ print STDERR "Please load i2c-stub first\n";
+ exit 2;
+ }
+
+ return $nr;
+}
+
+sub process_dump
+{
+ my $dump = shift;
+ my $err = 0;
+
+ open(DUMP, $dump) || die "Can't open $dump: $!\n";
+ OUTER_LOOP:
+ while (<DUMP>) {
+ if (m/^([0-9a-f]0):(( [0-9a-fX]{2}){16})/) {
+ # Byte dump
+ my $offset = hex($1);
+ my @values = split(/ /, $2);
+ shift(@values);
+ for (my $i = 0; $i < 16 && (my $val = shift(@values)); $i++) {
+ next if $val =~ m/X/;
+ if (system("i2cset", "-y", $bus_nr, $addr,
+ sprintf("0x\%02x", $offset+$i),
+ "0x$val", "b")) {
+ $err = 3;
+ last OUTER_LOOP;
+ }
+ $bytes++;
+ }
+ } elsif (m/^([0-9a-f][08]):(( [0-9a-fX]{4}){8})/) {
+ # Word dump
+ my $offset = hex($1);
+ my @values = split(/ /, $2);
+ shift(@values);
+ for (my $i = 0; $i < 8 && (my $val = shift(@values)); $i++) {
+ next if $val =~ m/X/;
+ if (system("i2cset", "-y", $bus_nr, $addr,
+ sprintf("0x\%02x", $offset+$i),
+ "0x$val", "w")) {
+ $err = 3;
+ last OUTER_LOOP;
+ }
+ $words++;
+ }
+ }
+ }
+ close(DUMP);
+
+ return $err;
+}
+
+if ($>) {
+ print "You must be root to use this script\n";
+ exit 1;
+}
+
+if (@ARGV != 2) {
+ print STDERR "Usage: i2c-stub-from-dump <addr> <dump file>\n";
+ exit 1;
+}
+
+# Check the parameters
+$addr = $ARGV[0];
+if ($addr !~ m/^0x[0-7][0-9a-f]$/i) {
+ print STDERR "Invalid address $addr\n";
+ exit 1;
+}
+
+initialize_kernel_version();
+
+$bus_nr = load_kernel_drivers($addr);
+$bytes = $words = 0;
+
+# We don't want to see the output of 256 i2cset
+open(SAVEOUT, ">&STDOUT");
+open(STDOUT, ">/dev/null");
+$err = process_dump($ARGV[1]);
+close(STDOUT);
+
+if ($bytes) {
+ printf SAVEOUT "$bytes byte values written to \%d-\%04x\n",
+ $bus_nr, oct($addr);
+}
+
+if ($words) {
+ printf SAVEOUT "$words word values written to \%d-\%04x\n",
+ $bus_nr, oct($addr);
+}
+
+if (!$err && ($bytes + $words == 0)) {
+ printf SAVEOUT "Only garbage found in dump file $ARGV[1]\n";
+ exit(1);
+}
+
+exit($err);
--- /dev/null
+.TH I2C-STUB-FROM-DUMP 8 "April 2008"
+.SH NAME
+i2c-stub-from-dump \- feed i2c-stub with a dump file
+
+.SH SYNOPSIS
+.B i2c-stub-from-dump
+.I address
+.I dump-file
+
+.SH DESCRIPTION
+i2c-stub-from-dump is a small helper script for the i2c-stub kernel driver.
+It lets you setup a fake I2C chip on the i2c-stub bus based on a dump of
+the chip you want to emulate.
+
+i2c-stub-from-dump requires i2cdetect and i2cset to be installed and
+reachable through the user's PATH. The former is used to find out the i2c-stub
+bus number, while the latter is used to write to the fake I2C chip.
+
+.SH EXAMPLE
+You have an I2C chip on system A. You would like to do some development on its
+driver on system B. Here are the few steps you have to follow.
+
+On system A, use i2cdump to capture a dump from the chip. Assuming that the
+chip in question lives at address 0x4c on I2C bus 0, you would run:
+
+ i2cdump -y 0 0x4c b > chip.dump
+
+Adjust the bus number and chip address for your case. i2cdetect can help
+you find out their values. If the device uses word (16-bit) register
+access instead of the traditional byte (8-bit) access, use mode \fBw\fR
+instead of \fBb\fR.
+
+Copy the dump file to system B.
+
+On system B, run:
+
+ i2c-stub-from-dump 0x4c chip.dump
+
+This will load the required i2c-dev and i2c-stub kernel drivers if needed,
+then write all the register values to the emulated I2C chip at address 0x4c.
+Again, adjust the address as needed.
+
+.SH LIMITATIONS
+There are some limitations to the kind of devices that can be handled:
+.IP \(bu
+Device must not have banks (as most Winbond devices do).
+
+.SH SEE ALSO
+i2cdump(8), i2cdetect(8), i2cset(8)
+
+.SH AUTHOR
+Jean Delvare
--- /dev/null
+# I2C tools for Linux
+#
+# Copyright (C) 2007 Jean Delvare <khali@linux-fr.org>
+#
+# Licensed under the GNU General Public License.
+
+TOOLS_DIR := tools
+
+TOOLS_CFLAGS := -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual \
+ -Wcast-align -Wwrite-strings -Wnested-externs -Winline \
+ -W -Wundef -Wmissing-prototypes -Iinclude
+
+TOOLS_TARGETS := i2cdetect i2cdump i2cset i2cget
+
+#
+# Programs
+#
+
+$(TOOLS_DIR)/i2cdetect: $(TOOLS_DIR)/i2cdetect.o $(TOOLS_DIR)/i2cbusses.o
+ $(CC) $(LDFLAGS) -o $@ $^
+
+$(TOOLS_DIR)/i2cdump: $(TOOLS_DIR)/i2cdump.o $(TOOLS_DIR)/i2cbusses.o $(TOOLS_DIR)/util.o
+ $(CC) $(LDFLAGS) -o $@ $^
+
+$(TOOLS_DIR)/i2cset: $(TOOLS_DIR)/i2cset.o $(TOOLS_DIR)/i2cbusses.o $(TOOLS_DIR)/util.o
+ $(CC) $(LDFLAGS) -o $@ $^
+
+$(TOOLS_DIR)/i2cget: $(TOOLS_DIR)/i2cget.o $(TOOLS_DIR)/i2cbusses.o $(TOOLS_DIR)/util.o
+ $(CC) $(LDFLAGS) -o $@ $^
+
+#
+# Objects
+#
+
+$(TOOLS_DIR)/i2cdetect.o: $(TOOLS_DIR)/i2cdetect.c $(TOOLS_DIR)/i2cbusses.h
+ $(CC) $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
+
+$(TOOLS_DIR)/i2cdump.o: $(TOOLS_DIR)/i2cdump.c $(TOOLS_DIR)/i2cbusses.h $(TOOLS_DIR)/util.h
+ $(CC) $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
+
+$(TOOLS_DIR)/i2cset.o: $(TOOLS_DIR)/i2cset.c $(TOOLS_DIR)/i2cbusses.h $(TOOLS_DIR)/util.h
+ $(CC) $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
+
+$(TOOLS_DIR)/i2cget.o: $(TOOLS_DIR)/i2cget.c $(TOOLS_DIR)/i2cbusses.h $(TOOLS_DIR)/util.h
+ $(CC) $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
+
+$(TOOLS_DIR)/i2cbusses.o: $(TOOLS_DIR)/i2cbusses.c $(TOOLS_DIR)/i2cbusses.h
+ $(CC) $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
+
+$(TOOLS_DIR)/util.o: $(TOOLS_DIR)/util.c $(TOOLS_DIR)/util.h
+ $(CC) $(CFLAGS) $(TOOLS_CFLAGS) -c $< -o $@
+
+#
+# Commands
+#
+
+all-tools: $(addprefix $(TOOLS_DIR)/,$(TOOLS_TARGETS))
+
+strip-tools: $(addprefix $(TOOLS_DIR)/,$(TOOLS_TARGETS))
+ strip $(addprefix $(TOOLS_DIR)/,$(TOOLS_TARGETS))
+
+clean-tools:
+ $(RM) $(addprefix $(TOOLS_DIR)/,*.o $(TOOLS_TARGETS))
+
+install-tools: $(addprefix $(TOOLS_DIR)/,$(TOOLS_TARGETS))
+ $(INSTALL_DIR) $(DESTDIR)$(sbindir) $(DESTDIR)$(man8dir)
+ for program in $(TOOLS_TARGETS) ; do \
+ $(INSTALL_PROGRAM) $(TOOLS_DIR)/$$program $(DESTDIR)$(sbindir) ; \
+ $(INSTALL_DATA) $(TOOLS_DIR)/$$program.8 $(DESTDIR)$(man8dir) ; done
+
+uninstall-tools:
+ for program in $(TOOLS_TARGETS) ; do \
+ $(RM) $(DESTDIR)$(sbindir)/$$program ; \
+ $(RM) $(DESTDIR)$(man8dir)/$$program.8 ; done
+
+all: all-tools
+
+strip: strip-tools
+
+clean: clean-tools
+
+install: install-tools
+
+uninstall: uninstall-tools
--- /dev/null
+/*
+ i2cbusses: Print the installed i2c busses for both 2.4 and 2.6 kernels.
+ Part of user-space programs to access for I2C
+ devices.
+ Copyright (c) 1999-2003 Frodo Looijaard <frodol@dds.nl> and
+ Mark D. Studebaker <mdsxyz123@yahoo.com>
+ Copyright (C) 2008 Jean Delvare <khali@linux-fr.org>
+
+ 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+ MA 02110-1301 USA.
+*/
+
+/* For strdup */
+#define _BSD_SOURCE 1
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h> /* for NAME_MAX */
+#include <string.h>
+#include <strings.h> /* for strcasecmp() */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "i2cbusses.h"
+#include <linux/i2c-dev.h>
+
+enum adt { adt_dummy, adt_isa, adt_i2c, adt_smbus, adt_unknown };
+
+struct adap_type {
+ const char *funcs;
+ const char* algo;
+};
+
+static struct adap_type adap_types[5] = {
+ { .funcs = "dummy",
+ .algo = "Dummy bus", },
+ { .funcs = "isa",
+ .algo = "ISA bus", },
+ { .funcs = "i2c",
+ .algo = "I2C adapter", },
+ { .funcs = "smbus",
+ .algo = "SMBus adapter", },
+ { .funcs = "unknown",
+ .algo = "N/A", },
+};
+
+static enum adt i2c_get_funcs(int i2cbus)
+{
+ unsigned long funcs;
+ int file;
+ char filename[20];
+ enum adt ret;
+
+ file = open_i2c_dev(i2cbus, filename, 1);
+ if (file < 0)
+ return adt_unknown;
+
+ if (ioctl(file, I2C_FUNCS, &funcs) < 0)
+ ret = adt_unknown;
+ else if (funcs & I2C_FUNC_I2C)
+ ret = adt_i2c;
+ else if (funcs & (I2C_FUNC_SMBUS_BYTE |
+ I2C_FUNC_SMBUS_BYTE_DATA |
+ I2C_FUNC_SMBUS_WORD_DATA))
+ ret = adt_smbus;
+ else
+ ret = adt_dummy;
+
+ close(file);
+ return ret;
+}
+
+/* Remove trailing spaces from a string
+ Return the new string length including the trailing NUL */
+static int rtrim(char *s)
+{
+ int i;
+
+ for (i = strlen(s) - 1; i >= 0 && (s[i] == ' ' || s[i] == '\n'); i--)
+ s[i] = '\0';
+ return i + 2;
+}
+
+void free_adapters(struct i2c_adap *adapters)
+{
+ int i;
+
+ for (i = 0; adapters[i].name; i++)
+ free(adapters[i].name);
+ free(adapters);
+}
+
+/* We allocate space for the adapters in bunches. The last item is a
+ terminator, so here we start with room for 7 adapters, which should
+ be enough in most cases. If not, we allocate more later as needed. */
+#define BUNCH 8
+
+/* n must match the size of adapters at calling time */
+static struct i2c_adap *more_adapters(struct i2c_adap *adapters, int n)
+{
+ struct i2c_adap *new_adapters;
+
+ new_adapters = realloc(adapters, (n + BUNCH) * sizeof(struct i2c_adap));
+ if (!new_adapters) {
+ free_adapters(adapters);
+ return NULL;
+ }
+ memset(new_adapters + n, 0, BUNCH * sizeof(struct i2c_adap));
+
+ return new_adapters;
+}
+
+struct i2c_adap *gather_i2c_busses(void)
+{
+ char s[120];
+ struct dirent *de, *dde;
+ DIR *dir, *ddir;
+ FILE *f;
+ char fstype[NAME_MAX], sysfs[NAME_MAX], n[NAME_MAX];
+ int foundsysfs = 0;
+ int count=0;
+ struct i2c_adap *adapters;
+
+ adapters = calloc(BUNCH, sizeof(struct i2c_adap));
+ if (!adapters)
+ return NULL;
+
+ /* look in /proc/bus/i2c */
+ if ((f = fopen("/proc/bus/i2c", "r"))) {
+ while (fgets(s, 120, f)) {
+ char *algo, *name, *type, *all;
+ int len_algo, len_name, len_type;
+ int i2cbus;
+
+ algo = strrchr(s, '\t');
+ *(algo++) = '\0';
+ len_algo = rtrim(algo);
+
+ name = strrchr(s, '\t');
+ *(name++) = '\0';
+ len_name = rtrim(name);
+
+ type = strrchr(s, '\t');
+ *(type++) = '\0';
+ len_type = rtrim(type);
+
+ sscanf(s, "i2c-%d", &i2cbus);
+
+ if ((count + 1) % BUNCH == 0) {
+ /* We need more space */
+ adapters = more_adapters(adapters, count + 1);
+ if (!adapters)
+ return NULL;
+ }
+
+ all = malloc(len_name + len_type + len_algo);
+ if (all == NULL) {
+ free_adapters(adapters);
+ return NULL;
+ }
+ adapters[count].nr = i2cbus;
+ adapters[count].name = strcpy(all, name);
+ adapters[count].funcs = strcpy(all + len_name, type);
+ adapters[count].algo = strcpy(all + len_name + len_type,
+ algo);
+ count++;
+ }
+ fclose(f);
+ goto done;
+ }
+
+ /* look in sysfs */
+ /* First figure out where sysfs was mounted */
+ if ((f = fopen("/proc/mounts", "r")) == NULL) {
+ goto done;
+ }
+ while (fgets(n, NAME_MAX, f)) {
+ sscanf(n, "%*[^ ] %[^ ] %[^ ] %*s\n", sysfs, fstype);
+ if (strcasecmp(fstype, "sysfs") == 0) {
+ foundsysfs++;
+ break;
+ }
+ }
+ fclose(f);
+ if (! foundsysfs) {
+ goto done;
+ }
+
+ /* Bus numbers in i2c-adapter don't necessarily match those in
+ i2c-dev and what we really care about are the i2c-dev numbers.
+ Unfortunately the names are harder to get in i2c-dev */
+ strcat(sysfs, "/class/i2c-dev");
+ if(!(dir = opendir(sysfs)))
+ goto done;
+ /* go through the busses */
+ while ((de = readdir(dir)) != NULL) {
+ if (!strcmp(de->d_name, "."))
+ continue;
+ if (!strcmp(de->d_name, ".."))
+ continue;
+
+ /* this should work for kernels 2.6.5 or higher and */
+ /* is preferred because is unambiguous */
+ sprintf(n, "%s/%s/name", sysfs, de->d_name);
+ f = fopen(n, "r");
+ /* this seems to work for ISA */
+ if(f == NULL) {
+ sprintf(n, "%s/%s/device/name", sysfs, de->d_name);
+ f = fopen(n, "r");
+ }
+ /* non-ISA is much harder */
+ /* and this won't find the correct bus name if a driver
+ has more than one bus */
+ if(f == NULL) {
+ sprintf(n, "%s/%s/device", sysfs, de->d_name);
+ if(!(ddir = opendir(n)))
+ continue;
+ while ((dde = readdir(ddir)) != NULL) {
+ if (!strcmp(dde->d_name, "."))
+ continue;
+ if (!strcmp(dde->d_name, ".."))
+ continue;
+ if ((!strncmp(dde->d_name, "i2c-", 4))) {
+ sprintf(n, "%s/%s/device/%s/name",
+ sysfs, de->d_name, dde->d_name);
+ if((f = fopen(n, "r")))
+ goto found;
+ }
+ }
+ }
+
+found:
+ if (f != NULL) {
+ int i2cbus;
+ enum adt type;
+ char *px;
+
+ px = fgets(s, 120, f);
+ fclose(f);
+ if (!px) {
+ fprintf(stderr, "%s: read error\n", n);
+ continue;
+ }
+ if ((px = strchr(s, '\n')) != NULL)
+ *px = 0;
+ if (!sscanf(de->d_name, "i2c-%d", &i2cbus))
+ continue;
+ if (!strncmp(s, "ISA ", 4)) {
+ type = adt_isa;
+ } else {
+ /* Attempt to probe for adapter capabilities */
+ type = i2c_get_funcs(i2cbus);
+ }
+
+ if ((count + 1) % BUNCH == 0) {
+ /* We need more space */
+ adapters = more_adapters(adapters, count + 1);
+ if (!adapters)
+ return NULL;
+ }
+
+ adapters[count].nr = i2cbus;
+ adapters[count].name = strdup(s);
+ if (adapters[count].name == NULL) {
+ free_adapters(adapters);
+ return NULL;
+ }
+ adapters[count].funcs = adap_types[type].funcs;
+ adapters[count].algo = adap_types[type].algo;
+ count++;
+ }
+ }
+ closedir(dir);
+
+done:
+ return adapters;
+}
+
+static int lookup_i2c_bus_by_name(const char *bus_name)
+{
+ struct i2c_adap *adapters;
+ int i, i2cbus = -1;
+
+ adapters = gather_i2c_busses();
+ if (adapters == NULL) {
+ fprintf(stderr, "Error: Out of memory!\n");
+ return -3;
+ }
+
+ /* Walk the list of i2c busses, looking for the one with the
+ right name */
+ for (i = 0; adapters[i].name; i++) {
+ if (strcmp(adapters[i].name, bus_name) == 0) {
+ if (i2cbus >= 0) {
+ fprintf(stderr,
+ "Error: I2C bus name is not unique!\n");
+ i2cbus = -4;
+ goto done;
+ }
+ i2cbus = adapters[i].nr;
+ }
+ }
+
+ if (i2cbus == -1)
+ fprintf(stderr, "Error: I2C bus name doesn't match any "
+ "bus present!\n");
+
+done:
+ free_adapters(adapters);
+ return i2cbus;
+}
+
+/*
+ * Parse an I2CBUS command line argument and return the corresponding
+ * bus number, or a negative value if the bus is invalid.
+ */
+int lookup_i2c_bus(const char *i2cbus_arg)
+{
+ long i2cbus;
+ char *end;
+
+ i2cbus = strtol(i2cbus_arg, &end, 0);
+ if (*end || !*i2cbus_arg) {
+ /* Not a number, maybe a name? */
+ return lookup_i2c_bus_by_name(i2cbus_arg);
+ }
+ if (i2cbus < 0 || i2cbus > 0xff) {
+ fprintf(stderr, "Error: I2C bus out of range (0-255)!\n");
+ return -2;
+ }
+
+ return i2cbus;
+}
+
+/*
+ * Parse a CHIP-ADDRESS command line argument and return the corresponding
+ * chip address, or a negative value if the address is invalid.
+ */
+int parse_i2c_address(const char *address_arg)
+{
+ long address;
+ char *end;
+
+ address = strtol(address_arg, &end, 0);
+ if (*end || !*address_arg) {
+ fprintf(stderr, "Error: Chip address is not a number!\n");
+ return -1;
+ }
+ if (address < 0x03 || address > 0x77) {
+ fprintf(stderr, "Error: Chip address out of range "
+ "(0x03-0x77)!\n");
+ return -2;
+ }
+
+ return address;
+}
+
+int open_i2c_dev(const int i2cbus, char *filename, const int quiet)
+{
+ int file;
+
+ sprintf(filename, "/dev/i2c/%d", i2cbus);
+ file = open(filename, O_RDWR);
+
+ if (file < 0 && errno == ENOENT) {
+ sprintf(filename, "/dev/i2c-%d", i2cbus);
+ file = open(filename, O_RDWR);
+ }
+
+ if (file < 0 && !quiet) {
+ if (errno == ENOENT) {
+ fprintf(stderr, "Error: Could not open file "
+ "`/dev/i2c-%d' or `/dev/i2c/%d': %s\n",
+ i2cbus, i2cbus, strerror(ENOENT));
+ } else {
+ fprintf(stderr, "Error: Could not open file "
+ "`%s': %s\n", filename, strerror(errno));
+ if (errno == EACCES)
+ fprintf(stderr, "Run as root?\n");
+ }
+ }
+
+ return file;
+}
+
+int set_slave_addr(int file, int address, int force)
+{
+ /* With force, let the user read from/write to the registers
+ even when a driver is also running */
+ if (ioctl(file, force ? I2C_SLAVE_FORCE : I2C_SLAVE, address) < 0) {
+ fprintf(stderr,
+ "Error: Could not set address to 0x%02x: %s\n",
+ address, strerror(errno));
+ return -errno;
+ }
+
+ return 0;
+}
--- /dev/null
+/*
+ i2cbusses.h - Part of the i2c-tools package
+
+ Copyright (C) 2004-2007 Jean Delvare <khali@linux-fr.org>
+
+ 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+ MA 02110-1301 USA.
+*/
+
+#ifndef _I2CBUSSES_H
+#define _I2CBUSSES_H
+
+struct i2c_adap {
+ int nr;
+ char *name;
+ const char *funcs;
+ const char *algo;
+};
+
+struct i2c_adap *gather_i2c_busses(void);
+void free_adapters(struct i2c_adap *adapters);
+
+int lookup_i2c_bus(const char *i2cbus_arg);
+int parse_i2c_address(const char *address_arg);
+int open_i2c_dev(const int i2cbus, char *filename, const int quiet);
+int set_slave_addr(int file, int address, int force);
+
+#define MISSING_FUNC_FMT "Error: Adapter does not have %s capability\n"
+
+#endif
--- /dev/null
+.TH I2CDETECT 8 "April 2008"
+.SH NAME
+i2cdetect \- detect I2C chips
+
+.SH SYNOPSIS
+.B i2cdetect
+.RI [ -y ]
+.RI [ -a ]
+.RI [ -q | -r ]
+.I i2cbus
+.RI [ "first last" ]
+.br
+.B i2cdetect
+.I -F
+.I i2cbus
+.br
+.B i2cdetect
+.I -V
+.br
+.B i2cdetect
+.I -l
+
+.SH DESCRIPTION
+i2cdetect is a userspace program to scan an I2C bus for devices. It
+outputs a table with the list of detected devices on the specified bus.
+\fIi2cbus\fR indicates the number or name of the I2C bus to be scanned, and
+should correspond to one of the busses listed by \fIi2cdetect -l\fR.
+The optional parameters \fIfirst\fR and \fIlast\fR restrict the scanning
+range (default: from 0x03 to 0x77).
+.PP
+i2cdetect can also be used to query the functionalities of an I2C bus
+(see option \fB-F\fP.)
+
+.SH WARNING
+This program can confuse your I2C bus, cause data loss and worse!
+
+.SH INTERPRETING THE OUTPUT
+Each cell in the output table will contain one of the following symbols:
+.IP \(bu "\w'\(bu'u+1n"
+"--". The address was probed but no chip answered.
+.IP \(bu
+"UU". Probing was skipped, because this address is currently in use by
+a driver. This strongly suggests that there is a chip at this address.
+.IP \(bu
+An address number in hexadecimal, e.g. "2d" or "4e". A chip
+was found at this address.
+
+.SH OPTIONS
+.TP
+.B "\-y"
+Disable interactive mode. By default, i2cdetect will wait for a confirmation
+from the user before messing with the I2C bus. When this flag is used, it
+will perform the operation directly. This is mainly meant to be used in
+scripts.
+.TP
+.B "\-a"
+Force scanning of non-regular addresses. Not recommended.
+.TP
+.B "\-q"
+Use SMBus "quick write" commands for probing (by default, the command
+used is the one believed to be the safest for each address).
+Not recommended. This is known to corrupt the Atmel AT24RF08 EEPROM
+found on many IBM Thinkpad laptops.
+.TP
+.B "\-r"
+Use SMBus "read byte" commands for probing (by default, the command
+used is the one believed to be the safest for each address).
+Not recommended. This is known to lock SMBus on various write-only
+chips (most notably clock chips at address 0x69).
+.TP
+.B "\-F"
+Display the list of functionalities implemented by the adapter and exit.
+.TP
+.B "\-V"
+Display the version and exit.
+.TP
+.B "\-l"
+Output a list of installed busses.
+
+.SH SEE ALSO
+i2cdump(8), sensors-detect(8)
+
+.SH AUTHOR
+Frodo Looijaard, Mark D. Studebaker and Jean Delvare
+
+This manual page was originally written by Aurelien Jarno
+<aurel32@debian.org>, for the Debian GNU/Linux system.
--- /dev/null
+/*
+ i2cdetect.c - a user-space program to scan for I2C devices
+ Copyright (C) 1999-2004 Frodo Looijaard <frodol@dds.nl>,
+ Mark D. Studebaker <mdsxyz123@yahoo.com> and
+ Jean Delvare <khali@linux-fr.org>
+
+ 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+ MA 02110-1301 USA.
+*/
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <linux/i2c-dev.h>
+#include "i2cbusses.h"
+#include "../version.h"
+
+#define MODE_AUTO 0
+#define MODE_QUICK 1
+#define MODE_READ 2
+#define MODE_FUNC 3
+
+static void help(void)
+{
+ fprintf(stderr,
+ "Usage: i2cdetect [-y] [-a] [-q|-r] I2CBUS [FIRST LAST]\n"
+ " i2cdetect -F I2CBUS\n"
+ " i2cdetect -l\n"
+ " I2CBUS is an integer or an I2C bus name\n"
+ " If provided, FIRST and LAST limit the probing range.\n");
+}
+
+static int scan_i2c_bus(int file, int mode, int first, int last)
+{
+ int i, j;
+ int res;
+
+ printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\n");
+
+ for (i = 0; i < 128; i += 16) {
+ printf("%02x: ", i);
+ for(j = 0; j < 16; j++) {
+ fflush(stdout);
+
+ /* Skip unwanted addresses */
+ if (i+j < first || i+j > last) {
+ printf(" ");
+ continue;
+ }
+
+ /* Set slave address */
+ if (ioctl(file, I2C_SLAVE, i+j) < 0) {
+ if (errno == EBUSY) {
+ printf("UU ");
+ continue;
+ } else {
+ fprintf(stderr, "Error: Could not set "
+ "address to 0x%02x: %s\n", i+j,
+ strerror(errno));
+ return -1;
+ }
+ }
+
+ /* Probe this address */
+ switch (mode) {
+ case MODE_QUICK:
+ /* This is known to corrupt the Atmel AT24RF08
+ EEPROM */
+ res = i2c_smbus_write_quick(file,
+ I2C_SMBUS_WRITE);
+ break;
+ case MODE_READ:
+ /* This is known to lock SMBus on various
+ write-only chips (mainly clock chips) */
+ res = i2c_smbus_read_byte(file);
+ break;
+ default:
+ if ((i+j >= 0x30 && i+j <= 0x37)
+ || (i+j >= 0x50 && i+j <= 0x5F))
+ res = i2c_smbus_read_byte(file);
+ else
+ res = i2c_smbus_write_quick(file,
+ I2C_SMBUS_WRITE);
+ }
+
+ if (res < 0)
+ printf("-- ");
+ else
+ printf("%02x ", i+j);
+ }
+ printf("\n");
+ }
+
+ return 0;
+}
+
+struct func
+{
+ long value;
+ const char* name;
+};
+
+static const struct func all_func[] = {
+ { .value = I2C_FUNC_I2C,
+ .name = "I2C" },
+ { .value = I2C_FUNC_SMBUS_QUICK,
+ .name = "SMBus Quick Command" },
+ { .value = I2C_FUNC_SMBUS_WRITE_BYTE,
+ .name = "SMBus Send Byte" },
+ { .value = I2C_FUNC_SMBUS_READ_BYTE,
+ .name = "SMBus Receive Byte" },
+ { .value = I2C_FUNC_SMBUS_WRITE_BYTE_DATA,
+ .name = "SMBus Write Byte" },
+ { .value = I2C_FUNC_SMBUS_READ_BYTE_DATA,
+ .name = "SMBus Read Byte" },
+ { .value = I2C_FUNC_SMBUS_WRITE_WORD_DATA,
+ .name = "SMBus Write Word" },
+ { .value = I2C_FUNC_SMBUS_READ_WORD_DATA,
+ .name = "SMBus Read Word" },
+ { .value = I2C_FUNC_SMBUS_PROC_CALL,
+ .name = "SMBus Process Call" },
+ { .value = I2C_FUNC_SMBUS_WRITE_BLOCK_DATA,
+ .name = "SMBus Block Write" },
+ { .value = I2C_FUNC_SMBUS_READ_BLOCK_DATA,
+ .name = "SMBus Block Read" },
+ { .value = I2C_FUNC_SMBUS_BLOCK_PROC_CALL,
+ .name = "SMBus Block Process Call" },
+ { .value = I2C_FUNC_SMBUS_PEC,
+ .name = "SMBus PEC" },
+ { .value = I2C_FUNC_SMBUS_WRITE_I2C_BLOCK,
+ .name = "I2C Block Write" },
+ { .value = I2C_FUNC_SMBUS_READ_I2C_BLOCK,
+ .name = "I2C Block Read" },
+ { .value = 0, .name = "" }
+};
+
+static void print_functionality(unsigned long funcs)
+{
+ int i;
+
+ for (i = 0; all_func[i].value; i++) {
+ printf("%-32s %s\n", all_func[i].name,
+ (funcs & all_func[i].value) ? "yes" : "no");
+ }
+}
+
+/*
+ * Print the installed i2c busses. The format is those of Linux 2.4's
+ * /proc/bus/i2c for historical compatibility reasons.
+ */
+static void print_i2c_busses(void)
+{
+ struct i2c_adap *adapters;
+ int count;
+
+ adapters = gather_i2c_busses();
+ if (adapters == NULL) {
+ fprintf(stderr, "Error: Out of memory!\n");
+ return;
+ }
+
+ for (count = 0; adapters[count].name; count++) {
+ printf("i2c-%d\t%-10s\t%-32s\t%s\n",
+ adapters[count].nr, adapters[count].funcs,
+ adapters[count].name, adapters[count].algo);
+ }
+
+ free_adapters(adapters);
+}
+
+int main(int argc, char *argv[])
+{
+ char *end;
+ int i2cbus, file, res;
+ char filename[20];
+ unsigned long funcs;
+ int mode = MODE_AUTO;
+ int first = 0x03, last = 0x77;
+ int flags = 0;
+ int yes = 0, version = 0, list = 0;
+
+ /* handle (optional) flags first */
+ while (1+flags < argc && argv[1+flags][0] == '-') {
+ switch (argv[1+flags][1]) {
+ case 'V': version = 1; break;
+ case 'y': yes = 1; break;
+ case 'l': list = 1; break;
+ case 'F':
+ if (mode != MODE_AUTO && mode != MODE_FUNC) {
+ fprintf(stderr, "Error: Different modes "
+ "specified!\n");
+ exit(1);
+ }
+ mode = MODE_FUNC;
+ break;
+ case 'r':
+ if (mode == MODE_QUICK) {
+ fprintf(stderr, "Error: Different modes "
+ "specified!\n");
+ exit(1);
+ }
+ mode = MODE_READ;
+ break;
+ case 'q':
+ if (mode == MODE_READ) {
+ fprintf(stderr, "Error: Different modes "
+ "specified!\n");
+ exit(1);
+ }
+ mode = MODE_QUICK;
+ break;
+ case 'a':
+ first = 0x00;
+ last = 0x7F;
+ break;
+ default:
+ fprintf(stderr, "Error: Unsupported option "
+ "\"%s\"!\n", argv[1+flags]);
+ help();
+ exit(1);
+ }
+ flags++;
+ }
+
+ if (version) {
+ fprintf(stderr, "i2cdetect version %s\n", VERSION);
+ exit(0);
+ }
+
+ if (list) {
+ print_i2c_busses();
+ exit(0);
+ }
+
+ if (argc < flags + 2) {
+ fprintf(stderr, "Error: No i2c-bus specified!\n");
+ help();
+ exit(1);
+ }
+ i2cbus = lookup_i2c_bus(argv[flags+1]);
+ if (i2cbus < 0) {
+ help();
+ exit(1);
+ }
+
+ /* read address range if present */
+ if (argc == flags + 4 && mode != MODE_FUNC) {
+ int tmp;
+
+ tmp = strtol(argv[flags+2], &end, 0);
+ if (*end) {
+ fprintf(stderr, "Error: FIRST argment not a "
+ "number!\n");
+ help();
+ exit(1);
+ }
+ if (tmp < first || tmp > last) {
+ fprintf(stderr, "Error: FIRST argument out of range "
+ "(0x%02x-0x%02x)!\n", first, last);
+ help();
+ exit(1);
+ }
+ first = tmp;
+
+ tmp = strtol(argv[flags+3], &end, 0);
+ if (*end) {
+ fprintf(stderr, "Error: LAST argment not a "
+ "number!\n");
+ help();
+ exit(1);
+ }
+ if (tmp < first || tmp > last) {
+ fprintf(stderr, "Error: LAST argument out of range "
+ "(0x%02x-0x%02x)!\n", first, last);
+ help();
+ exit(1);
+ }
+ last = tmp;
+ } else if (argc != flags + 2) {
+ help();
+ exit(1);
+ }
+
+ file = open_i2c_dev(i2cbus, filename, 0);
+ if (file < 0) {
+ exit(1);
+ }
+
+ if (ioctl(file, I2C_FUNCS, &funcs) < 0) {
+ fprintf(stderr, "Error: Could not get the adapter "
+ "functionality matrix: %s\n", strerror(errno));
+ close(file);
+ exit(1);
+ }
+
+ /* Special case, we only list the implemented functionalities */
+ if (mode == MODE_FUNC) {
+ close(file);
+ printf("Functionalities implemented by %s:\n", filename);
+ print_functionality(funcs);
+ exit(0);
+ }
+
+ if (mode != MODE_READ && !(funcs & I2C_FUNC_SMBUS_QUICK)) {
+ fprintf(stderr, "Error: Can't use SMBus Quick Write command "
+ "on this bus (ISA bus?)\n");
+ close(file);
+ exit(1);
+ }
+ if (mode != MODE_QUICK && !(funcs & I2C_FUNC_SMBUS_READ_BYTE)) {
+ fprintf(stderr, "Error: Can't use SMBus Read Byte command "
+ "on this bus (ISA bus?)\n");
+ close(file);
+ exit(1);
+ }
+
+ if (!yes) {
+ char s[2];
+
+ fprintf(stderr, "WARNING! This program can confuse your I2C "
+ "bus, cause data loss and worse!\n");
+
+ fprintf(stderr, "I will probe file %s%s.\n", filename,
+ mode==MODE_QUICK?" using quick write commands":
+ mode==MODE_READ?" using read byte commands":"");
+ fprintf(stderr, "I will probe address range 0x%02x-0x%02x.\n",
+ first, last);
+
+ fprintf(stderr, "Continue? [Y/n] ");
+ fflush(stderr);
+ if (!fgets(s, 2, stdin)
+ || (s[0] != '\n' && s[0] != 'y' && s[0] != 'Y')) {
+ fprintf(stderr, "Aborting on user request.\n");
+ exit(0);
+ }
+ }
+
+ res = scan_i2c_bus(file, mode, first, last);
+
+ close(file);
+
+ exit(res?1:0);
+}
--- /dev/null
+.TH I2CDUMP 8 "May 2008"
+.SH NAME
+i2cdump \- examine I2C registers
+
+.SH SYNOPSIS
+.B i2cdump
+.RB [ -f ]
+.RB [ "-r first-last" ]
+.RB [ -y ]
+.I i2cbus
+.I address
+.RI [ "mode " [ "bank " [ bankreg ]]]
+.br
+.B i2cdump
+.B -V
+
+.SH DESCRIPTION
+i2cdump is a small helper program to examine registers
+visible through the I2C bus.
+
+.SH OPTIONS
+.TP
+.B -V
+Display the version and exit.
+.TP
+.B -f
+Force access to the device even if it is already busy. By default, i2cdump
+will refuse to access a device which is already under the control of a
+kernel driver. Using this flag is dangerous, it can seriously confuse the
+kernel driver in question. It can also cause i2cdump to return invalid
+results. So use at your own risk and only if you know what you're doing.
+.TP
+.B -r first-last
+Limit the range of registers being accessed. This option is only available
+with modes \fBb\fP, \fBw\fP, \fBc\fP and \fBW\fP. For mode \fBW\fP,
+\fBfirst\fR must be even and \fBlast\fR must be odd.
+.TP
+.B -y
+Disable interactive mode. By default, i2cdump will wait for a confirmation
+from the user before messing with the I2C bus. When this flag is used, it
+will perform the operation directly. This is mainly meant to be used in
+scripts.
+.PP
+At least two options must be provided to i2cdump. \fIi2cbus\fR indicates the
+number or name of the I2C bus to be scanned. This number should correspond to one
+of the busses listed by \fIi2cdetect -l\fR. \fIaddress\fR indicates the
+address to be scanned on that bus, and is an integer between 0x03 and 0x77.
+.PP
+The \fImode\fR parameter, if specified, is one of the letters \fBb\fP, \fBw\fP,
+\fBs\fP, or \fBi\fP, corresponding to a read size of a single byte, a 16-bit
+word, an SMBus block, an I2C block, respectively. The \fBc\fP mode is a
+little different, it reads all bytes consecutively, and is useful for chips that
+have an address auto-increment feature, such as EEPROMs. The \fBW\fP mode is
+also special, it is similar to \fBw\fP except that a read command will only
+be issued on even register addresses; this is again mainly useful for EEPROMs.
+.PP
+A \fBp\fP can also be appended to the \fImode\fR parameter (except for
+\fBi\fP and \fBW\fP) to enable PEC. If the \fImode\fR parameter is omitted,
+i2cdump defaults to byte access without PEC.
+.PP
+The \fIbank\fR and \fIbankreg\fR parameters are useful on the W83781D and
+similar chips (at the time of writing, all Winbond and Asus chips).
+\fIbank\fR is an integer between 0 and 7, and \fIbankreg\fR is an integer
+between 0x00 and 0xFF (default value: 0x4E). The W83781D data sheet has more
+information on bank selection.
+
+.SH WARNING
+i2cdump can be dangerous if used improperly. Most notably, the \fBc\fP mode
+starts with WRITING a byte to the chip. On most chips it will be stored in the
+address pointer register, which is OK, but some chips with a single register
+or no (visible) register at all will most likely see this as a real WRITE,
+resulting in possible misbehavior or corruption. Do not use i2cdump
+on random addresses. Anyway, it is of little use unless you have good
+knowledge of the chip you're working with and an idea of what you are looking
+for.
+
+.SH SEE ALSO
+i2cset(8), i2cdetect(8), isadump(8)
+
+.SH AUTHOR
+Frodo Looijaard, Mark D. Studebaker and Jean Delvare
+
+This manual page was originally written by David Z Maze <dmaze@debian.org> for
+the Debian GNU/Linux system.
--- /dev/null
+/*
+ i2cdump.c - a user-space program to dump I2C registers
+ Copyright (C) 2002-2003 Frodo Looijaard <frodol@dds.nl>, and
+ Mark D. Studebaker <mdsxyz123@yahoo.com>
+ Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org>
+
+ 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+ MA 02110-1301 USA.
+*/
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <linux/i2c-dev.h>
+#include "i2cbusses.h"
+#include "util.h"
+#include "../version.h"
+
+static void help(void)
+{
+ fprintf(stderr,
+ "Usage: i2cdump [-f] [-y] [-r first-last] I2CBUS ADDRESS [MODE [BANK [BANKREG]]]\n"
+ " I2CBUS is an integer or an I2C bus name\n"
+ " ADDRESS is an integer (0x03 - 0x77)\n"
+ " MODE is one of:\n"
+ " b (byte, default)\n"
+ " w (word)\n"
+ " W (word on even register addresses)\n"
+ " s (SMBus block)\n"
+ " i (I2C block)\n"
+ " c (consecutive byte)\n"
+ " Append p for SMBus PEC\n");
+}
+
+static int check_funcs(int file, int size, int pec)
+{
+ unsigned long funcs;
+
+ /* check adapter functionality */
+ if (ioctl(file, I2C_FUNCS, &funcs) < 0) {
+ fprintf(stderr, "Error: Could not get the adapter "
+ "functionality matrix: %s\n", strerror(errno));
+ return -1;
+ }
+
+ switch(size) {
+ case I2C_SMBUS_BYTE:
+ if (!(funcs & I2C_FUNC_SMBUS_READ_BYTE)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus receive byte");
+ return -1;
+ }
+ if (!(funcs & I2C_FUNC_SMBUS_WRITE_BYTE)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus send byte");
+ return -1;
+ }
+ break;
+
+ case I2C_SMBUS_BYTE_DATA:
+ if (!(funcs & I2C_FUNC_SMBUS_READ_BYTE_DATA)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus read byte");
+ return -1;
+ }
+ break;
+
+ case I2C_SMBUS_WORD_DATA:
+ if (!(funcs & I2C_FUNC_SMBUS_READ_WORD_DATA)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus read word");
+ return -1;
+ }
+ break;
+
+ case I2C_SMBUS_BLOCK_DATA:
+ if (!(funcs & I2C_FUNC_SMBUS_READ_BLOCK_DATA)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus block read");
+ return -1;
+ }
+ break;
+
+ case I2C_SMBUS_I2C_BLOCK_DATA:
+ if (!(funcs & I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "I2C block read");
+ return -1;
+ }
+ break;
+ }
+
+ if (pec
+ && !(funcs & (I2C_FUNC_SMBUS_PEC | I2C_FUNC_I2C))) {
+ fprintf(stderr, "Warning: Adapter does "
+ "not seem to support PEC\n");
+ }
+
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ char *end;
+ int i, j, res, i2cbus, address, size, file;
+ int bank = 0, bankreg = 0x4E, old_bank = 0;
+ char filename[20];
+ int block[256], s_length = 0;
+ int pec = 0, even = 0;
+ int flags = 0;
+ int force = 0, yes = 0, version = 0;
+ const char *range = NULL;
+ int first = 0x00, last = 0xff;
+
+ /* handle (optional) flags first */
+ while (1+flags < argc && argv[1+flags][0] == '-') {
+ switch (argv[1+flags][1]) {
+ case 'V': version = 1; break;
+ case 'f': force = 1; break;
+ case 'r': range = argv[1+(++flags)]; break;
+ case 'y': yes = 1; break;
+ default:
+ fprintf(stderr, "Error: Unsupported option "
+ "\"%s\"!\n", argv[1+flags]);
+ help();
+ exit(1);
+ }
+ flags++;
+ }
+
+ if (version) {
+ fprintf(stderr, "i2cdump version %s\n", VERSION);
+ exit(0);
+ }
+
+ if (argc < flags + 2) {
+ fprintf(stderr, "Error: No i2c-bus specified!\n");
+ help();
+ exit(1);
+ }
+ i2cbus = lookup_i2c_bus(argv[flags+1]);
+ if (i2cbus < 0) {
+ help();
+ exit(1);
+ }
+
+ if (argc < flags + 3) {
+ fprintf(stderr, "Error: No address specified!\n");
+ help();
+ exit(1);
+ }
+ address = parse_i2c_address(argv[flags+2]);
+ if (address < 0) {
+ help();
+ exit(1);
+ }
+
+ if (argc < flags + 4) {
+ fprintf(stderr, "No size specified (using byte-data access)\n");
+ size = I2C_SMBUS_BYTE_DATA;
+ } else if (!strncmp(argv[flags+3], "b", 1)) {
+ size = I2C_SMBUS_BYTE_DATA;
+ pec = argv[flags+3][1] == 'p';
+ } else if (!strncmp(argv[flags+3], "w", 1)) {
+ size = I2C_SMBUS_WORD_DATA;
+ pec = argv[flags+3][1] == 'p';
+ } else if (!strncmp(argv[flags+3], "W", 1)) {
+ size = I2C_SMBUS_WORD_DATA;
+ even = 1;
+ } else if (!strncmp(argv[flags+3], "s", 1)) {
+ size = I2C_SMBUS_BLOCK_DATA;
+ pec = argv[flags+3][1] == 'p';
+ } else if (!strncmp(argv[flags+3], "c", 1)) {
+ size = I2C_SMBUS_BYTE;
+ pec = argv[flags+3][1] == 'p';
+ } else if (!strcmp(argv[flags+3], "i"))
+ size = I2C_SMBUS_I2C_BLOCK_DATA;
+ else {
+ fprintf(stderr, "Error: Invalid mode!\n");
+ help();
+ exit(1);
+ }
+
+ if (argc > flags + 4) {
+ bank = strtol(argv[flags+4], &end, 0);
+ if (*end || size == I2C_SMBUS_I2C_BLOCK_DATA) {
+ fprintf(stderr, "Error: Invalid bank number!\n");
+ help();
+ exit(1);
+ }
+ if ((size == I2C_SMBUS_BYTE_DATA || size == I2C_SMBUS_WORD_DATA)
+ && (bank < 0 || bank > 15)) {
+ fprintf(stderr, "Error: bank out of range!\n");
+ help();
+ exit(1);
+ }
+ if (size == I2C_SMBUS_BLOCK_DATA
+ && (bank < 0 || bank > 0xff)) {
+ fprintf(stderr, "Error: block command out of range!\n");
+ help();
+ exit(1);
+ }
+
+ if (argc > flags + 5) {
+ bankreg = strtol(argv[flags+5], &end, 0);
+ if (*end || size == I2C_SMBUS_BLOCK_DATA) {
+ fprintf(stderr, "Error: Invalid bank register "
+ "number!\n");
+ help();
+ exit(1);
+ }
+ if (bankreg < 0 || bankreg > 0xff) {
+ fprintf(stderr, "Error: bank out of range "
+ "(0-0xff)!\n");
+ help();
+ exit(1);
+ }
+ }
+ }
+
+ /* Parse optional range string */
+ if (range) {
+ char *dash;
+
+ first = strtol(range, &dash, 0);
+ if (dash == range || *dash != '-'
+ || first < 0 || first > 0xff) {
+ fprintf(stderr, "Error: Invalid range parameter!\n");
+ exit(1);
+ }
+ last = strtol(++dash, &end, 0);
+ if (end == dash || *end != '\0'
+ || last < first || last > 0xff) {
+ fprintf(stderr, "Error: Invalid range parameter!\n");
+ exit(1);
+ }
+
+ /* Check mode constraints */
+ switch (size) {
+ case I2C_SMBUS_BYTE:
+ case I2C_SMBUS_BYTE_DATA:
+ break;
+ case I2C_SMBUS_WORD_DATA:
+ if (!even || (!(first%2) && last%2))
+ break;
+ /* Fall through */
+ default:
+ fprintf(stderr,
+ "Error: Range parameter not compatible with selected mode!\n");
+ exit(1);
+ }
+ }
+
+ file = open_i2c_dev(i2cbus, filename, 0);
+ if (file < 0
+ || check_funcs(file, size, pec)
+ || set_slave_addr(file, address, force))
+ exit(1);
+
+ if (pec) {
+ if (ioctl(file, I2C_PEC, 1) < 0) {
+ fprintf(stderr, "Error: Could not set PEC: %s\n",
+ strerror(errno));
+ exit(1);
+ }
+ }
+
+ if (!yes) {
+ fprintf(stderr, "WARNING! This program can confuse your I2C "
+ "bus, cause data loss and worse!\n");
+
+ fprintf(stderr, "I will probe file %s, address 0x%x, mode "
+ "%s\n", filename, address,
+ size == I2C_SMBUS_BLOCK_DATA ? "smbus block" :
+ size == I2C_SMBUS_I2C_BLOCK_DATA ? "i2c block" :
+ size == I2C_SMBUS_BYTE ? "byte consecutive read" :
+ size == I2C_SMBUS_BYTE_DATA ? "byte" : "word");
+ if (pec)
+ fprintf(stderr, "PEC checking enabled.\n");
+ if (even)
+ fprintf(stderr, "Only probing even register "
+ "addresses.\n");
+ if (bank) {
+ if (size == I2C_SMBUS_BLOCK_DATA)
+ fprintf(stderr, "Using command 0x%02x.\n",
+ bank);
+ else
+ fprintf(stderr, "Probing bank %d using bank "
+ "register 0x%02x.\n", bank, bankreg);
+ }
+ if (range) {
+ fprintf(stderr,
+ "Probe range limited to 0x%02x-0x%02x.\n",
+ first, last);
+ }
+
+ fprintf(stderr, "Continue? [Y/n] ");
+ fflush(stderr);
+ if (!user_ack(1)) {
+ fprintf(stderr, "Aborting on user request.\n");
+ exit(0);
+ }
+ }
+
+ /* See Winbond w83781d data sheet for bank details */
+ if (bank && size != I2C_SMBUS_BLOCK_DATA) {
+ res = i2c_smbus_read_byte_data(file, bankreg);
+ if (res >= 0) {
+ old_bank = res;
+ res = i2c_smbus_write_byte_data(file, bankreg,
+ bank | (old_bank & 0xf0));
+ }
+ if (res < 0) {
+ fprintf(stderr, "Error: Bank switching failed\n");
+ exit(1);
+ }
+ }
+
+ /* handle all but word data */
+ if (size != I2C_SMBUS_WORD_DATA || even) {
+ /* do the block transaction */
+ if (size == I2C_SMBUS_BLOCK_DATA
+ || size == I2C_SMBUS_I2C_BLOCK_DATA) {
+ unsigned char cblock[288];
+
+ if (size == I2C_SMBUS_BLOCK_DATA) {
+ res = i2c_smbus_read_block_data(file, bank,
+ cblock);
+ /* Remember returned block length for a nicer
+ display later */
+ s_length = res;
+ } else {
+ for (res = 0; res < 256; res += i) {
+ i = i2c_smbus_read_i2c_block_data(file,
+ res, 32, cblock + res);
+ if (i <= 0) {
+ res = i;
+ break;
+ }
+ }
+ }
+ if (res <= 0) {
+ fprintf(stderr, "Error: Block read failed, "
+ "return code %d\n", res);
+ exit(1);
+ }
+ if (res >= 256)
+ res = 256;
+ for (i = 0; i < res; i++)
+ block[i] = cblock[i];
+ if (size != I2C_SMBUS_BLOCK_DATA)
+ for (i = res; i < 256; i++)
+ block[i] = -1;
+ }
+
+ if (size == I2C_SMBUS_BYTE) {
+ res = i2c_smbus_write_byte(file, first);
+ if(res != 0) {
+ fprintf(stderr, "Error: Write start address "
+ "failed, return code %d\n", res);
+ exit(1);
+ }
+ }
+
+ printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f"
+ " 0123456789abcdef\n");
+ for (i = 0; i < 256; i+=16) {
+ if (size == I2C_SMBUS_BLOCK_DATA && i >= s_length)
+ break;
+ if (i/16 < first/16)
+ continue;
+ if (i/16 > last/16)
+ break;
+
+ printf("%02x: ", i);
+ for (j = 0; j < 16; j++) {
+ fflush(stdout);
+ /* Skip unwanted registers */
+ if (i+j < first || i+j > last) {
+ printf(" ");
+ if (size == I2C_SMBUS_WORD_DATA) {
+ printf(" ");
+ j++;
+ }
+ continue;
+ }
+
+ if (size == I2C_SMBUS_BYTE_DATA) {
+ block[i+j] = res =
+ i2c_smbus_read_byte_data(file, i+j);
+ } else if (size == I2C_SMBUS_WORD_DATA) {
+ res = i2c_smbus_read_word_data(file,
+ i+j);
+ if (res < 0) {
+ block[i+j] = res;
+ block[i+j+1] = res;
+ } else {
+ block[i+j] = res & 0xff;
+ block[i+j+1] = res >> 8;
+ }
+ } else if (size == I2C_SMBUS_BYTE) {
+ block[i+j] = res =
+ i2c_smbus_read_byte(file);
+ } else
+ res = block[i+j];
+
+ if (size == I2C_SMBUS_BLOCK_DATA
+ && i+j >= s_length) {
+ printf(" ");
+ } else if (res < 0) {
+ printf("XX ");
+ if (size == I2C_SMBUS_WORD_DATA)
+ printf("XX ");
+ } else {
+ printf("%02x ", block[i+j]);
+ if (size == I2C_SMBUS_WORD_DATA)
+ printf("%02x ", block[i+j+1]);
+ }
+ if (size == I2C_SMBUS_WORD_DATA)
+ j++;
+ }
+ printf(" ");
+
+ for (j = 0; j < 16; j++) {
+ if (size == I2C_SMBUS_BLOCK_DATA
+ && i+j >= s_length)
+ break;
+ /* Skip unwanted registers */
+ if (i+j < first || i+j > last) {
+ printf(" ");
+ continue;
+ }
+
+ res = block[i+j];
+ if (res < 0)
+ printf("X");
+ else
+ if ((res & 0xff) == 0x00
+ || (res & 0xff) == 0xff)
+ printf(".");
+ else
+ if ((res & 0xff) < 32
+ || (res & 0xff) >= 127)
+ printf("?");
+ else
+ printf("%c", res & 0xff);
+ }
+ printf("\n");
+ }
+ } else {
+ printf(" 0,8 1,9 2,a 3,b 4,c 5,d 6,e 7,f\n");
+ for (i = 0; i < 256; i+=8) {
+ if (i/8 < first/8)
+ continue;
+ if (i/8 > last/8)
+ break;
+
+ printf("%02x: ", i);
+ for (j = 0; j < 8; j++) {
+ /* Skip unwanted registers */
+ if (i+j < first || i+j > last) {
+ printf(" ");
+ continue;
+ }
+
+ res = i2c_smbus_read_word_data(file, i+j);
+ if (res < 0)
+ printf("XXXX ");
+ else
+ printf("%04x ", res & 0xffff);
+ }
+ printf("\n");
+ }
+ }
+ if (bank && size != I2C_SMBUS_BLOCK_DATA) {
+ i2c_smbus_write_byte_data(file, bankreg, old_bank);
+ }
+ exit(0);
+}
--- /dev/null
+.TH I2CGET 8 "May 2008"
+.SH "NAME"
+i2cget \- read from I2C/SMBus chip registers
+
+.SH SYNOPSIS
+.B i2cget
+.RB [ -f ]
+.RB [ -y ]
+.I i2cbus
+.I chip-address
+.RI [ "data-address " [ mode ]]
+.br
+.B i2cget
+.B -V
+
+.SH DESCRIPTION
+i2cget is a small helper program to read registers visible through the I2C
+bus (or SMBus).
+
+.SH OPTIONS
+.TP
+.B -V
+Display the version and exit.
+.TP
+.B -f
+Force access to the device even if it is already busy. By default, i2cget
+will refuse to access a device which is already under the control of a
+kernel driver. Using this flag is dangerous, it can seriously confuse the
+kernel driver in question. It can also cause i2cget to return an invalid
+value. So use at your own risk and only if you know what you're doing.
+.TP
+.B -y
+Disable interactive mode. By default, i2cget will wait for a confirmation
+from the user before messing with the I2C bus. When this flag is used, it
+will perform the operation directly. This is mainly meant to be used in
+scripts. Use with caution.
+.PP
+There are two required options to i2cget. \fIi2cbus\fR indicates the number
+or name of the I2C bus to be scanned. This number should correspond to one of
+the busses listed by \fIi2cdetect -l\fR. \fIchip-address\fR specifies the
+address of the chip on that bus, and is an integer between 0x03 and 0x77.
+.PP
+\fIdata-address\fR specifies the address on that chip to read from, and is
+an integer between 0x00 and 0xFF. If omitted, the currently active register
+will be read (if that makes sense for the considered chip).
+.PP
+The \fImode\fR parameter, if specified, is one of the letters \fBb\fP,
+\fBw\fP or \fBc\fP, corresponding to a read byte data, a read word data or a
+write byte/read byte transaction, respectively. A \fBp\fP can also be appended
+to the \fImode\fR parameter to enable PEC. If the \fImode\fR parameter is omitted,
+i2cget defaults to a read byte data transaction, unless \fIdata-address\fR is
+also omitted, in which case the default (and only valid) transaction is a
+single read byte.
+
+.SH WARNING
+i2cget can be extremely dangerous if used improperly. I2C and SMBus are designed
+in such a way that an SMBus read transaction can be seen as a write transaction by
+certain chips. This is particularly true if setting \fImode\fR to \fBcp\fP (write byte/read
+byte with PEC). Be extremely careful using this program.
+
+.SH SEE ALSO
+i2cdump(8), i2cset(8)
+
+.SH AUTHOR
+Jean Delvare
+
+This manual page was strongly inspired from those written by David Z Maze
+for i2cset.
--- /dev/null
+/*
+ i2cget.c - A user-space program to read an I2C register.
+ Copyright (C) 2005-2008 Jean Delvare <khali@linux-fr.org>
+
+ Based on i2cset.c:
+ Copyright (C) 2001-2003 Frodo Looijaard <frodol@dds.nl>, and
+ Mark D. Studebaker <mdsxyz123@yahoo.com>
+ Copyright (C) 2004-2005 Jean Delvare <khali@linux-fr.org>
+
+ 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+ MA 02110-1301 USA.
+*/
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <linux/i2c-dev.h>
+#include "i2cbusses.h"
+#include "util.h"
+#include "../version.h"
+
+static void help(void) __attribute__ ((noreturn));
+
+static void help(void)
+{
+ fprintf(stderr,
+ "Usage: i2cget [-f] [-y] I2CBUS CHIP-ADDRESS [DATA-ADDRESS [MODE]]\n"
+ " I2CBUS is an integer or an I2C bus name\n"
+ " ADDRESS is an integer (0x03 - 0x77)\n"
+ " MODE is one of:\n"
+ " b (read byte data, default)\n"
+ " w (read word data)\n"
+ " c (write byte/read byte)\n"
+ " Append p for SMBus PEC\n");
+ exit(1);
+}
+
+static int check_funcs(int file, int size, int daddress, int pec)
+{
+ unsigned long funcs;
+
+ /* check adapter functionality */
+ if (ioctl(file, I2C_FUNCS, &funcs) < 0) {
+ fprintf(stderr, "Error: Could not get the adapter "
+ "functionality matrix: %s\n", strerror(errno));
+ return -1;
+ }
+
+ switch (size) {
+ case I2C_SMBUS_BYTE:
+ if (!(funcs & I2C_FUNC_SMBUS_READ_BYTE)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus receive byte");
+ return -1;
+ }
+ if (daddress >= 0
+ && !(funcs & I2C_FUNC_SMBUS_WRITE_BYTE)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus send byte");
+ return -1;
+ }
+ break;
+
+ case I2C_SMBUS_BYTE_DATA:
+ if (!(funcs & I2C_FUNC_SMBUS_READ_BYTE_DATA)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus read byte");
+ return -1;
+ }
+ break;
+
+ case I2C_SMBUS_WORD_DATA:
+ if (!(funcs & I2C_FUNC_SMBUS_READ_WORD_DATA)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus read word");
+ return -1;
+ }
+ break;
+ }
+
+ if (pec
+ && !(funcs & (I2C_FUNC_SMBUS_PEC | I2C_FUNC_I2C))) {
+ fprintf(stderr, "Warning: Adapter does "
+ "not seem to support PEC\n");
+ }
+
+ return 0;
+}
+
+static int confirm(const char *filename, int address, int size, int daddress,
+ int pec)
+{
+ int dont = 0;
+
+ fprintf(stderr, "WARNING! This program can confuse your I2C "
+ "bus, cause data loss and worse!\n");
+
+ /* Don't let the user break his/her EEPROMs */
+ if (address >= 0x50 && address <= 0x57 && pec) {
+ fprintf(stderr, "STOP! EEPROMs are I2C devices, not "
+ "SMBus devices. Using PEC\non I2C devices may "
+ "result in unexpected results, such as\n"
+ "trashing the contents of EEPROMs. We can't "
+ "let you do that, sorry.\n");
+ return 0;
+ }
+
+ if (size == I2C_SMBUS_BYTE && daddress >= 0 && pec) {
+ fprintf(stderr, "WARNING! All I2C chips and some SMBus chips "
+ "will interpret a write\nbyte command with PEC as a"
+ "write byte data command, effectively writing a\n"
+ "value into a register!\n");
+ dont++;
+ }
+
+ fprintf(stderr, "I will read from device file %s, chip "
+ "address 0x%02x, ", filename, address);
+ if (daddress < 0)
+ fprintf(stderr, "current data\naddress");
+ else
+ fprintf(stderr, "data address\n0x%02x", daddress);
+ fprintf(stderr, ", using %s.\n",
+ size == I2C_SMBUS_BYTE ? (daddress < 0 ?
+ "read byte" : "write byte/read byte") :
+ size == I2C_SMBUS_BYTE_DATA ? "read byte data" :
+ "read word data");
+ if (pec)
+ fprintf(stderr, "PEC checking enabled.\n");
+
+ fprintf(stderr, "Continue? [%s] ", dont ? "y/N" : "Y/n");
+ fflush(stderr);
+ if (!user_ack(!dont)) {
+ fprintf(stderr, "Aborting on user request.\n");
+ return 0;
+ }
+
+ return 1;
+}
+
+int main(int argc, char *argv[])
+{
+ char *end;
+ int res, i2cbus, address, size, file;
+ int daddress;
+ char filename[20];
+ int pec = 0;
+ int flags = 0;
+ int force = 0, yes = 0, version = 0;
+
+ /* handle (optional) flags first */
+ while (1+flags < argc && argv[1+flags][0] == '-') {
+ switch (argv[1+flags][1]) {
+ case 'V': version = 1; break;
+ case 'f': force = 1; break;
+ case 'y': yes = 1; break;
+ default:
+ fprintf(stderr, "Error: Unsupported option "
+ "\"%s\"!\n", argv[1+flags]);
+ help();
+ exit(1);
+ }
+ flags++;
+ }
+
+ if (version) {
+ fprintf(stderr, "i2cget version %s\n", VERSION);
+ exit(0);
+ }
+
+ if (argc < flags + 3)
+ help();
+
+ i2cbus = lookup_i2c_bus(argv[flags+1]);
+ if (i2cbus < 0)
+ help();
+
+ address = parse_i2c_address(argv[flags+2]);
+ if (address < 0)
+ help();
+
+ if (argc > flags + 3) {
+ size = I2C_SMBUS_BYTE_DATA;
+ daddress = strtol(argv[flags+3], &end, 0);
+ if (*end || daddress < 0 || daddress > 0xff) {
+ fprintf(stderr, "Error: Data address invalid!\n");
+ help();
+ }
+ } else {
+ size = I2C_SMBUS_BYTE;
+ daddress = -1;
+ }
+
+ if (argc > flags + 4) {
+ switch (argv[flags+4][0]) {
+ case 'b': size = I2C_SMBUS_BYTE_DATA; break;
+ case 'w': size = I2C_SMBUS_WORD_DATA; break;
+ case 'c': size = I2C_SMBUS_BYTE; break;
+ default:
+ fprintf(stderr, "Error: Invalid mode!\n");
+ help();
+ }
+ pec = argv[flags+4][1] == 'p';
+ }
+
+ file = open_i2c_dev(i2cbus, filename, 0);
+ if (file < 0
+ || check_funcs(file, size, daddress, pec)
+ || set_slave_addr(file, address, force))
+ exit(1);
+
+ if (!yes && !confirm(filename, address, size, daddress, pec))
+ exit(0);
+
+ if (pec && ioctl(file, I2C_PEC, 1) < 0) {
+ fprintf(stderr, "Error: Could not set PEC: %s\n",
+ strerror(errno));
+ close(file);
+ exit(1);
+ }
+
+ switch (size) {
+ case I2C_SMBUS_BYTE:
+ if (daddress >= 0) {
+ res = i2c_smbus_write_byte(file, daddress);
+ if (res < 0)
+ fprintf(stderr, "Warning - write failed\n");
+ }
+ res = i2c_smbus_read_byte(file);
+ break;
+ case I2C_SMBUS_WORD_DATA:
+ res = i2c_smbus_read_word_data(file, daddress);
+ break;
+ default: /* I2C_SMBUS_BYTE_DATA */
+ res = i2c_smbus_read_byte_data(file, daddress);
+ }
+ close(file);
+
+ if (res < 0) {
+ fprintf(stderr, "Error: Read failed\n");
+ exit(2);
+ }
+
+ printf("0x%0*x\n", size == I2C_SMBUS_WORD_DATA ? 4 : 2, res);
+
+ exit(0);
+}
--- /dev/null
+.TH I2CSET 8 "November 2008"
+.SH "NAME"
+i2cset \- set I2C registers
+
+.SH SYNOPSIS
+.B i2cset
+.RB [ -f ]
+.RB [ -y ]
+.RB [ "-m mask" ]
+.RB [ -r ]
+.I i2cbus
+.I chip-address
+.I data-address
+.RI [ "value " [ "mode" ]]
+.br
+.B i2cset
+.B -V
+
+.SH DESCRIPTION
+i2cset is a small helper program to set registers visible through the I2C
+bus.
+
+.SH OPTIONS
+.TP
+.B -V
+Display the version and exit.
+.TP
+.B -f
+Force access to the device even if it is already busy. By default, i2cset
+will refuse to access a device which is already under the control of a
+kernel driver. Using this flag is dangerous, it can seriously confuse the
+kernel driver in question. It can also cause i2cset to silently write to
+the wrong register. So use at your own risk and only if you know what
+you're doing.
+.TP
+.B -y
+Disable interactive mode. By default, i2cset will wait for a confirmation
+from the user before messing with the I2C bus. When this flag is used, it
+will perform the operation directly. This is mainly meant to be used in
+scripts.
+.TP
+.B -m mask
+The \fImask\fR parameter, if specified, describes which bits of \fIvalue\fR
+will be actually written to \fIdata-address\fR. Bits set to 1 in the mask
+are taken from \fIvalue\fR, while bits set to 0 will be read from
+\fIdata-address\fR and thus preserved by the operation. Please note that
+this parameter assumes that the read and write operations for the specified
+mode are symmetrical for the device you are accessing. This may or may not
+be the case, as neither I2C nor SMBus guarantees this.
+.TP
+.B -r
+Read back the value right after writing it, and compare the result with the
+value written. This used to be the default behavior. The same limitations
+apply as those of option \fB-m\fR.
+.PP
+There are three required options to i2cset. \fIi2cbus\fR indicates the number
+or name of the I2C bus to be scanned. This number should correspond to one of
+the busses listed by \fIi2cdetect -l\fR. \fIchip-address\fR specifies the
+address of the chip on that bus, and is an integer between 0x03 and 0x77.
+\fIdata-address\fR specifies the address on that chip to write to, and is an
+integer between 0x00 and 0xFF.
+.PP
+The \fIvalue\fR parameter, if specified, is the value to write to that
+location on the chip. If this parameter is omited, then a short write is
+issued. For most chips, it simply sets an internal pointer to the target
+location, but doesn't actually write to that location. For a few chips
+though, in particular simple ones with a single register, this short write
+is an actual write.
+.PP
+The \fImode\fR parameter, if specified, is one of the letters \fBb\fP or
+\fBw\fP, corresponding to a write size of a single byte or a 16-bit word,
+respectively. A \fBp\fP can also be appended to the \fImode\fR parameter to
+enable PEC. If the \fImode\fR parameter is omitted, i2cset defaults to byte
+mode without PEC. The \fIvalue\fR provided must be within range for the
+specified data type (0x00-0xFF for bytes, 0x0000-0xFFFF for words).
+
+.SH WARNING
+i2cset can be extremely dangerous if used improperly. It can confuse your
+I2C bus, cause data loss, or have more serious side effects. Writing to
+a serial EEPROM on a memory DIMM (chip addresses between 0x50 and 0x57) may
+DESTROY your memory, leaving your system unbootable! Be extremely careful
+using this program.
+
+.SH SEE ALSO
+i2cdump(8), isaset(8)
+
+.SH AUTHOR
+Frodo Looijaard, Mark D. Studebaker and Jean Delvare
+
+This manual page was originally written by David Z Maze <dmaze@debian.org> for
+the Debian GNU/Linux system.
--- /dev/null
+/*
+ i2cset.c - A user-space program to write an I2C register.
+ Copyright (C) 2001-2003 Frodo Looijaard <frodol@dds.nl>, and
+ Mark D. Studebaker <mdsxyz123@yahoo.com>
+ Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org>
+
+ 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; either version 2 of the License, 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 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., 51 Franklin Street, Fifth Floor, Boston,
+ MA 02110-1301 USA.
+*/
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <linux/i2c-dev.h>
+#include "i2cbusses.h"
+#include "util.h"
+#include "../version.h"
+
+static void help(void) __attribute__ ((noreturn));
+
+static void help(void)
+{
+ fprintf(stderr,
+ "Usage: i2cset [-f] [-y] [-m MASK] I2CBUS CHIP-ADDRESS DATA-ADDRESS [VALUE [MODE]]\n"
+ " I2CBUS is an integer or an I2C bus name\n"
+ " ADDRESS is an integer (0x03 - 0x77)\n"
+ " MODE is one of:\n"
+ " b (byte, default)\n"
+ " w (word)\n"
+ " Append p for SMBus PEC\n");
+ exit(1);
+}
+
+static int check_funcs(int file, int size, int pec)
+{
+ unsigned long funcs;
+
+ /* check adapter functionality */
+ if (ioctl(file, I2C_FUNCS, &funcs) < 0) {
+ fprintf(stderr, "Error: Could not get the adapter "
+ "functionality matrix: %s\n", strerror(errno));
+ return -1;
+ }
+
+ switch (size) {
+ case I2C_SMBUS_BYTE:
+ if (!(funcs & I2C_FUNC_SMBUS_WRITE_BYTE)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus send byte");
+ return -1;
+ }
+ break;
+
+ case I2C_SMBUS_BYTE_DATA:
+ if (!(funcs & I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus write byte");
+ return -1;
+ }
+ break;
+
+ case I2C_SMBUS_WORD_DATA:
+ if (!(funcs & I2C_FUNC_SMBUS_WRITE_WORD_DATA)) {
+ fprintf(stderr, MISSING_FUNC_FMT, "SMBus write word");
+ return -1;
+ }
+ break;
+ }
+
+ if (pec
+ && !(funcs & (I2C_FUNC_SMBUS_PEC | I2C_FUNC_I2C))) {
+ fprintf(stderr, "Warning: Adapter does "
+ "not seem to support PEC\n");
+ }
+
+ return 0;
+}
+
+static int confirm(const char *filename, int address, int size, int daddress,
+ int value, int vmask, int pec)
+{
+ int dont = 0;
+
+ fprintf(stderr, "WARNING! This program can confuse your I2C "
+ "bus, cause data loss and worse!\n");
+
+ if (address >= 0x50 && address <= 0x57) {
+ fprintf(stderr, "DANGEROUS! Writing to a serial "
+ "EEPROM on a memory DIMM\nmay render your "
+ "memory USELESS and make your system "
+ "UNBOOTABLE!\n");
+ dont++;
+ }
+
+ fprintf(stderr, "I will write to device file %s, chip address "
+ "0x%02x, data address\n0x%02x, ", filename, address, daddress);
+ if (size == I2C_SMBUS_BYTE)
+ fprintf(stderr, "no data.\n");
+ else
+ fprintf(stderr, "data 0x%02x%s, mode %s.\n", value,
+ vmask ? " (masked)" : "",
+ size == I2C_SMBUS_BYTE_DATA ? "byte" : "word");
+ if (pec)
+ fprintf(stderr, "PEC checking enabled.\n");
+
+ fprintf(stderr, "Continue? [%s] ", dont ? "y/N" : "Y/n");
+ fflush(stderr);
+ if (!user_ack(!dont)) {
+ fprintf(stderr, "Aborting on user request.\n");
+ return 0;
+ }
+
+ return 1;
+}
+
+int main(int argc, char *argv[])
+{
+ char *end;
+ const char *maskp = NULL;
+ int res, i2cbus, address, size, file;
+ int value, daddress, vmask = 0;
+ char filename[20];
+ int pec = 0;
+ int flags = 0;
+ int force = 0, yes = 0, version = 0, readback = 0;
+
+ /* handle (optional) flags first */
+ while (1+flags < argc && argv[1+flags][0] == '-') {
+ switch (argv[1+flags][1]) {
+ case 'V': version = 1; break;
+ case 'f': force = 1; break;
+ case 'y': yes = 1; break;
+ case 'm':
+ if (2+flags < argc)
+ maskp = argv[2+flags];
+ flags++;
+ break;
+ case 'r': readback = 1; break;
+ default:
+ fprintf(stderr, "Error: Unsupported option "
+ "\"%s\"!\n", argv[1+flags]);
+ help();
+ exit(1);
+ }
+ flags++;
+ }
+
+ if (version) {
+ fprintf(stderr, "i2cset version %s\n", VERSION);
+ exit(0);
+ }
+
+ if (argc < flags + 4)
+ help();
+
+ i2cbus = lookup_i2c_bus(argv[flags+1]);
+ if (i2cbus < 0)
+ help();
+
+ address = parse_i2c_address(argv[flags+2]);
+ if (address < 0)
+ help();
+
+ daddress = strtol(argv[flags+3], &end, 0);
+ if (*end || daddress < 0 || daddress > 0xff) {
+ fprintf(stderr, "Error: Data address invalid!\n");
+ help();
+ }
+
+ if (argc > flags + 4) {
+ size = I2C_SMBUS_BYTE_DATA;
+ value = strtol(argv[flags+4], &end, 0);
+ if (*end || value < 0) {
+ fprintf(stderr, "Error: Data value invalid!\n");
+ help();
+ }
+ } else {
+ size = I2C_SMBUS_BYTE;
+ value = -1;
+ }
+
+ if (argc > flags + 5) {
+ switch (argv[flags+5][0]) {
+ case 'b': size = I2C_SMBUS_BYTE_DATA; break;
+ case 'w': size = I2C_SMBUS_WORD_DATA; break;
+ default:
+ fprintf(stderr, "Error: Invalid mode!\n");
+ help();
+ }
+ pec = argv[flags+5][1] == 'p';
+ }
+
+ /* Old method to provide the value mask, deprecated and no longer
+ documented but still supported for compatibility */
+ if (argc > flags + 6) {
+ if (maskp) {
+ fprintf(stderr, "Error: Data value mask provided twice!\n");
+ help();
+ }
+ fprintf(stderr, "Warning: Using deprecated way to set the data value mask!\n");
+ fprintf(stderr, " Please switch to using -m.\n");
+ maskp = argv[flags+6];
+ }
+
+ if (maskp) {
+ vmask = strtol(maskp, &end, 0);
+ if (*end || vmask == 0) {
+ fprintf(stderr, "Error: Data value mask invalid!\n");
+ help();
+ }
+ }
+
+ if ((size == I2C_SMBUS_BYTE_DATA && value > 0xff)
+ || (size == I2C_SMBUS_WORD_DATA && value > 0xffff)) {
+ fprintf(stderr, "Error: Data value out of range!\n");
+ help();
+ }
+
+ file = open_i2c_dev(i2cbus, filename, 0);
+ if (file < 0
+ || check_funcs(file, size, pec)
+ || set_slave_addr(file, address, force))
+ exit(1);
+
+ if (!yes && !confirm(filename, address, size, daddress,
+ value, vmask, pec))
+ exit(0);
+
+ if (vmask) {
+ int oldvalue;
+
+ switch (size) {
+ case I2C_SMBUS_BYTE:
+ oldvalue = i2c_smbus_read_byte(file);
+ break;
+ case I2C_SMBUS_WORD_DATA:
+ oldvalue = i2c_smbus_read_word_data(file, daddress);
+ break;
+ default:
+ oldvalue = i2c_smbus_read_byte_data(file, daddress);
+ }
+
+ if (oldvalue < 0) {
+ fprintf(stderr, "Error: Failed to read old value\n");
+ exit(1);
+ }
+
+ value = (value & vmask) | (oldvalue & ~vmask);
+
+ if (!yes) {
+ fprintf(stderr, "Old value 0x%0*x, write mask "
+ "0x%0*x: Will write 0x%0*x to register "
+ "0x%02x\n",
+ size == I2C_SMBUS_WORD_DATA ? 4 : 2, oldvalue,
+ size == I2C_SMBUS_WORD_DATA ? 4 : 2, vmask,
+ size == I2C_SMBUS_WORD_DATA ? 4 : 2, value,
+ daddress);
+
+ fprintf(stderr, "Continue? [Y/n] ");
+ fflush(stderr);
+ if (!user_ack(1)) {
+ fprintf(stderr, "Aborting on user request.\n");
+ exit(0);
+ }
+ }
+ }
+
+ if (pec && ioctl(file, I2C_PEC, 1) < 0) {
+ fprintf(stderr, "Error: Could not set PEC: %s\n",
+ strerror(errno));
+ close(file);
+ exit(1);
+ }
+
+ switch (size) {
+ case I2C_SMBUS_BYTE:
+ res = i2c_smbus_write_byte(file, daddress);
+ break;
+ case I2C_SMBUS_WORD_DATA:
+ res = i2c_smbus_write_word_data(file, daddress, value);
+ break;
+ default: /* I2C_SMBUS_BYTE_DATA */
+ res = i2c_smbus_write_byte_data(file, daddress, value);
+ }
+ if (res < 0) {
+ fprintf(stderr, "Error: Write failed\n");
+ close(file);
+ exit(1);
+ }
+
+ if (pec) {
+ if (ioctl(file, I2C_PEC, 0) < 0) {
+ fprintf(stderr, "Error: Could not clear PEC: %s\n",
+ strerror(errno));
+ close(file);
+ exit(1);
+ }
+ }
+
+ if (!readback) { /* We're done */
+ close(file);
+ exit(0);
+ }
+
+ switch (size) {
+ case I2C_SMBUS_BYTE:
+ res = i2c_smbus_read_byte(file);
+ value = daddress;
+ break;
+ case I2C_SMBUS_WORD_DATA:
+ res = i2c_smbus_read_word_data(file, daddress);
+ break;
+ default: /* I2C_SMBUS_BYTE_DATA */
+ res = i2c_smbus_read_byte_data(file, daddress);
+ }
+ close(file);
+
+ if (res < 0) {
+ printf("Warning - readback failed\n");
+ } else
+ if (res != value) {
+ printf("Warning - data mismatch - wrote "
+ "0x%0*x, read back 0x%0*x\n",
+ size == I2C_SMBUS_WORD_DATA ? 4 : 2, value,
+ size == I2C_SMBUS_WORD_DATA ? 4 : 2, res);
+ } else {
+ printf("Value 0x%0*x written, readback matched\n",
+ size == I2C_SMBUS_WORD_DATA ? 4 : 2, value);
+ }
+
+ exit(0);
+}
--- /dev/null
+/*
+ util.c - helper functions
+ Copyright (C) 2006 Jean Delvare <khali@linux-fr.org>
+
+ 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; either version 2 of the License, or
+ (at your option) any later version.
+*/
+
+#include <stdio.h>
+#include "util.h"
+
+/* Return 1 if we should continue, 0 if we should abort */
+int user_ack(int def)
+{
+ char s[2];
+ int ret;
+
+ if (!fgets(s, 2, stdin))
+ return 0; /* Nack by default */
+
+ switch (s[0]) {
+ case 'y':
+ case 'Y':
+ ret = 1;
+ break;
+ case 'n':
+ case 'N':
+ ret = 0;
+ break;
+ default:
+ ret = def;
+ }
+
+ /* Flush extra characters */
+ while (s[0] != '\n') {
+ int c = fgetc(stdin);
+ if (c == EOF) {
+ ret = 0;
+ break;
+ }
+ s[0] = c;
+ }
+
+ return ret;
+}
+
--- /dev/null
+/*
+ util - helper functions
+ Copyright (C) 2006 Jean Delvare <khali@linux-fr.org>
+
+ 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; either version 2 of the License, or
+ (at your option) any later version.
+*/
+
+#ifndef _UTIL_H
+#define _UTIL_H
+
+extern int user_ack(int def);
+
+#endif /* _UTIL_H */
--- /dev/null
+#define VERSION "3.0.2"
projects / profile / extras / i2c-tools.git / commitdiff