152 lines
2.7 KiB
C
152 lines
2.7 KiB
C
/*
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* This file is part of the ectool project.
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*
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* Copyright (C) 2008-2009 coresystems GmbH
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/io.h>
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#include "ec.h"
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extern int verbose;
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#define debug(x...) if (verbose) printf(x)
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int send_ec_command(uint8_t command)
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{
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int timeout;
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timeout = 0x7ff;
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while ((inb(EC_SC) & EC_IBF) && --timeout) {
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usleep(10);
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if ((timeout & 0xff) == 0)
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debug(".");
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}
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if (!timeout) {
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debug("Timeout while sending command 0x%02x to EC!\n",
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command);
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// return -1;
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}
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outb(command, EC_SC);
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return 0;
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}
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int send_ec_data(uint8_t data)
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{
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int timeout;
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timeout = 0x7ff;
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while ((inb(EC_SC) & EC_IBF) && --timeout) { // wait for IBF = 0
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usleep(10);
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if ((timeout & 0xff) == 0)
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debug(".");
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}
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if (timeout) {
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debug("Timeout while sending data 0x%02x to EC!\n", data);
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// return -1;
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}
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outb(data, EC_DATA);
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return 0;
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}
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int send_ec_data_nowait(uint8_t data)
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{
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outb(data, EC_DATA);
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return 0;
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}
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uint8_t recv_ec_data(void)
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{
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int timeout;
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uint8_t data;
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timeout = 0x7fff;
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while (--timeout) { // Wait for OBF = 1
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if (inb(EC_SC) & EC_OBF) {
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break;
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}
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usleep(10);
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if ((timeout & 0xff) == 0)
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debug(".");
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}
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if (!timeout) {
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debug("\nTimeout while receiving data from EC!\n");
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// return -1;
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}
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data = inb(EC_DATA);
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debug("recv_ec_data: 0x%02x\n", data);
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return data;
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}
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uint8_t ec_read(uint8_t addr)
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{
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send_ec_command(RD_EC);
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send_ec_data(addr);
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return recv_ec_data();
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}
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uint8_t ec_ext_read(uint16_t addr)
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{
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send_ec_command(WR_EC);
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send_ec_data(0x02);
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send_ec_data(addr & 0xff);
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send_ec_command(RX_EC);
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send_ec_data(addr >> 8);
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return recv_ec_data();
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}
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int ec_ext_write(uint16_t addr, uint8_t data)
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{
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send_ec_command(WR_EC);
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send_ec_data(0x02);
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send_ec_data(addr & 0xff);
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send_ec_command(WX_EC);
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send_ec_data(addr >> 8);
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return send_ec_data(data);
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}
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int ec_write(uint8_t addr, uint8_t data)
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{
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send_ec_command(WR_EC);
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send_ec_data(addr);
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return send_ec_data(data);
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}
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uint8_t ec_idx_read(uint16_t addr)
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{
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uint16_t lpc_idx = 0x380;
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outb(addr & 0xff, lpc_idx + 2);
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outb(addr >> 8, lpc_idx + 1);
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return inb(lpc_idx + 3);
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}
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uint8_t ec_query(void)
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{
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send_ec_command(QR_EC);
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return recv_ec_data();
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}
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