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A small utility to dump the RAM of a laptop's Embedded/Environmental 

Controller. Nothing fancy, does not know any laptops, EC types, or what
the values mean. It just dumps them. For the dump method, have a look at
the ACPI 3.0b spec.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4163 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer 2009-04-22 07:23:00 +00:00 committed by Stefan Reinauer
parent 7e16bf3a55
commit b5ab323a40
4 changed files with 306 additions and 0 deletions
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34
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#
# Makefile for ectool
#
# Copyright (C) 2009 by coresystems GmbH
# written by Stefan Reinauer <stepan@coresystems.de>
#
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
#
CC=gcc
CFLAGS=-O2 -Wall -W
all: ectool
ectool: ec.o ectool.o
$(CC) $(CFLAGS) -o $@ $^
clean:
rm *.o ectool
%.o: %.c
$(CC) $(CFLAGS) -c $^ -I. -o $@

119
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/*
* This file is part of the ectool project.
*
* Copyright (C) 2008-2009 coresystems GmbH
*
* 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., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/io.h>
#include "ec.h"
extern int verbose;
#define debug(x...) if (verbose) printf(x)
int send_ec_command(uint8_t command)
{
int timeout;
timeout = 0x7ff;
while ((inb(EC_SC) & EC_IBF) && --timeout) {
usleep(10);
if ((timeout & 0xff) == 0)
debug(".");
}
if (!timeout) {
printf("Timeout while sending command 0x%02x to EC!\n",
command);
// return -1;
}
outb(command, EC_SC);
return 0;
}
int send_ec_data(uint8_t data)
{
int timeout;
timeout = 0x7ff;
while ((inb(EC_SC) & EC_IBF) && --timeout) { // wait for IBF = 0
usleep(10);
if ((timeout & 0xff) == 0)
debug(".");
}
if (!timeout) {
printf("Timeout while sending data 0x%02x to EC!\n",
data);
// return -1;
}
outb(data, EC_DATA);
return 0;
}
int send_ec_data_nowait(uint8_t data)
{
outb(data, EC_DATA);
return 0;
}
uint8_t recv_ec_data(void)
{
int timeout;
uint8_t data;
timeout = 0x7fff;
while (--timeout) { // Wait for OBF = 1
if (inb(EC_SC) & EC_OBF) {
break;
}
usleep(10);
if ((timeout & 0xff) == 0)
debug(".");
}
if (!timeout) {
printf("\nTimeout while receiving data from EC!\n");
// return -1;
}
data = inb(EC_DATA);
debug("recv_ec_data: 0x%02x\n", data);
return data;
}
uint8_t ec_read(uint8_t addr)
{
send_ec_command(0x80);
send_ec_data(addr);
return recv_ec_data();
}
int ec_write(uint8_t addr, uint8_t data)
{
send_ec_command(0x81);
send_ec_data(addr);
return send_ec_data(data);
}

49
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/*
* This file is part of the ectool project.
*
* Copyright (C) 2008-2009 coresystems GmbH
*
* 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., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#ifndef _EC_H
#define _EC_H
#include <stdint.h>
#define EC_DATA 0x62
#define EC_SC 0x66
/* EC_SC input */
#define EC_SMI_EVT (1 << 6) // 1: SMI event pending
#define EC_SCI_EVT (1 << 5) // 1: SCI event pending
#define EC_BURST (1 << 4) // controller is in burst mode
#define EC_CMD (1 << 3) // 1: byte in data register is command
// 0: byte in data register is data
#define EC_IBF (1 << 1) // 1: input buffer full (data ready for ec)
#define EC_OBF (1 << 0) // 1: output buffer full (data ready for host)
/* EC_SC output */
#define RD_EC 0x80 // Read Embedded Controller
#define WR_EC 0x81 // Write Embedded Controller
#define BE_EC 0x82 // Burst Enable Embedded Controller
#define BD_EC 0x83 // Burst Disable Embedded Controller
#define QR_EC 0x84 // Query Embedded Controller
int send_ec_command(uint8_t command);
int send_ec_data(uint8_t data);
int send_ec_data_nowait(uint8_t data);
uint8_t recv_ec_data(void);
uint8_t ec_read(uint8_t addr);
#endif

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/*
* This file is part of the ectool project.
*
* Copyright (C) 2008-2009 coresystems GmbH
*
* 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., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <sys/io.h>
#include <ec.h>
#define ECTOOL_VERSION "0.1"
void print_version(void)
{
printf("ectool v%s -- ", ECTOOL_VERSION);
printf("Copyright (C) 2008-2009 coresystems GmbH\n\n");
printf(
"This program is free software: you can redistribute it and/or modify\n"
"it under the terms of the GNU General Public License as published by\n"
"the Free Software Foundation, version 2 of the License.\n\n"
"This program is distributed in the hope that it will be useful,\n"
"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
"GNU General Public License for more details.\n\n"
"You should have received a copy of the GNU General Public License\n"
"along with this program. If not, see <http://www.gnu.org/licenses/>.\n\n");
}
void print_usage(const char *name)
{
printf("usage: %s [-vh?V]\n", name);
printf("\n"
" -v | --version: print the version\n"
" -h | --help: print this help\n\n"
" -V | --verbose: print debug information\n"
"\n");
exit(1);
}
int verbose = 0;
int main(int argc, char *argv[])
{
int i, opt, option_index = 0;
static struct option long_options[] = {
{"version", 0, 0, 'v'},
{"help", 0, 0, 'h'},
{"verbose", 0, 0, 'V'},
{0, 0, 0, 0}
};
while ((opt = getopt_long(argc, argv, "vh?V",
long_options, &option_index)) != EOF) {
switch (opt) {
case 'v':
print_version();
exit(0);
break;
case 'V':
verbose = 1;
break;
case 'h':
case '?':
default:
print_usage(argv[0]);
exit(0);
break;
}
}
if (iopl(3)) {
printf("You need to be root.\n");
exit(1);
}
printf("EC RAM:\n");
for (i=0; i < 0x100; i++) {
if ((i % 0x10) == 0)
printf ("\n%02x: ", i);
printf("%02x ", ec_read(i));
}
printf("\n\n");
return 0;
}