2dd1ded197
Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5861 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
150 lines
2.8 KiB
C
150 lines
2.8 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 <stdint.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) {
|
|
debug("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) {
|
|
debug("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) {
|
|
debug("\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(RD_EC);
|
|
send_ec_data(addr);
|
|
|
|
return recv_ec_data();
|
|
}
|
|
|
|
uint8_t ec_ext_read(uint16_t addr)
|
|
{
|
|
send_ec_command(WR_EC);
|
|
send_ec_data(0x02);
|
|
send_ec_data(addr & 0xff);
|
|
send_ec_command(RX_EC);
|
|
send_ec_data(addr >> 8);
|
|
|
|
return recv_ec_data();
|
|
}
|
|
|
|
int ec_ext_write(uint16_t addr, uint8_t data)
|
|
{
|
|
send_ec_command(WR_EC);
|
|
send_ec_data(0x02);
|
|
send_ec_data(addr & 0xff);
|
|
send_ec_command(WX_EC);
|
|
send_ec_data(addr >> 8);
|
|
|
|
return send_ec_data(data);
|
|
}
|
|
|
|
int ec_write(uint8_t addr, uint8_t data)
|
|
{
|
|
send_ec_command(WR_EC);
|
|
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);
|
|
}
|