/* * This file is part of the coreboot 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. */ #include <console/console.h> #include <device/device.h> #include <arch/io.h> #include <delay.h> #include "ec.h" #ifdef __PRE_RAM__ static const int ec_cmd_reg = EC_SC; static const int ec_data_reg = EC_DATA; #else static int ec_cmd_reg = EC_SC; static int ec_data_reg = EC_DATA; #endif int send_ec_command(u8 command) { int timeout; timeout = 0x7ff; while ((inb(ec_cmd_reg) & EC_IBF) && --timeout) { udelay(10); if ((timeout & 0xff) == 0) printk(BIOS_SPEW, "."); } if (!timeout) { printk(BIOS_DEBUG, "Timeout while sending command 0x%02x to EC!\n", command); // return -1; } udelay(10); outb(command, ec_cmd_reg); return 0; } int send_ec_data(u8 data) { int timeout; timeout = 0x7ff; while ((inb(ec_cmd_reg) & EC_IBF) && --timeout) { // wait for IBF = 0 udelay(10); if ((timeout & 0xff) == 0) printk(BIOS_SPEW, "."); } if (!timeout) { printk(BIOS_DEBUG, "Timeout while sending data 0x%02x to EC!\n", data); // return -1; } udelay(10); outb(data, ec_data_reg); return 0; } int send_ec_data_nowait(u8 data) { outb(data, ec_data_reg); return 0; } u8 recv_ec_data(void) { int timeout; u8 data; timeout = 0x7fff; while (--timeout) { // Wait for OBF = 1 if (inb(ec_cmd_reg) & EC_OBF) { break; } udelay(10); if ((timeout & 0xff) == 0) printk(BIOS_SPEW, "."); } if (!timeout) { printk(BIOS_DEBUG, "\nTimeout while receiving data from EC!\n"); // return -1; } udelay(10); data = inb(ec_data_reg); printk(BIOS_SPEW, "recv_ec_data: 0x%02x\n", data); return data; } u8 ec_read(u8 addr) { send_ec_command(0x80); send_ec_data(addr); return recv_ec_data(); } int ec_write(u8 addr, u8 data) { send_ec_command(0x81); send_ec_data(addr); return send_ec_data(data); } u8 ec_query(void) { send_ec_command(0x84); return recv_ec_data(); } void ec_set_bit(u8 addr, u8 bit) { ec_write(addr, ec_read(addr) | (1 << bit)); } void ec_clr_bit(u8 addr, u8 bit) { ec_write(addr, ec_read(addr) & ~(1 << bit)); } #ifndef __PRE_RAM__ void ec_set_ports(u16 cmd_reg, u16 data_reg) { ec_cmd_reg = cmd_reg; ec_data_reg = data_reg; } #endif #if !defined(__SMM__) && !defined(__PRE_RAM__) struct chip_operations ec_acpi_ops = { CHIP_NAME("ACPI Embedded Controller") }; #endif