coreboot-kgpe-d16/util/ectool/ec.c
Stefan Reinauer 14e2277962 Since some people disapprove of white space cleanups mixed in regular commits
while others dislike them being extra commits, let's clean them up once and
for all for the existing code. If it's ugly, let it only be ugly once :-)

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5507 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2010-04-27 06:56:47 +00:00

126 lines
2.4 KiB
C

/*
* 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);
}
uint8_t ec_idx_read(uint16_t addr)
{
uint16_t lpc_idx = 0x380;
outb(addr & 0xff, lpc_idx + 2);
outb(addr >> 8, lpc_idx + 1);
return inb(lpc_idx + 3);
}