120 lines
2.2 KiB
C
120 lines
2.2 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);
|
||
|
|
}
|
||
|
|
|