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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);
}
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