/* * 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); } uint8_t ec_query(void) { send_ec_command(QR_EC); return recv_ec_data(); }