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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2006 Uwe Hermann <uwe@hermann-uwe.de>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 <arch/romcc_io.h>
#include "fdc37m60x.h"
/* The base address is 0x3f0 or 0x370, depending on the SYSOPT pin. */
#define SIO_BASE 0x3f0
#define SIO_INDEX SIO_BASE
#define SIO_DATA SIO_BASE+1
/* Global configuration registers. */
#define FDC37M60X_CONFIG_REG_CC 0x02 /* Configure Control. */
#define FDC37M60X_CONFIG_REG_LDN 0x07 /* Logical Device Number. */
#define FDC37M60X_CONFIG_POWER_CONTROL 0x22 /* Power Control. */
#define FDC37M60X_CONFIG_POWER_MGMT 0x23 /* Intelligent Power Mgmt. */
#define FDC37M60X_CONFIG_OSC 0x24 /* OSC. */
#define FDC37M60X_CONFIGURATION_PORT 0x3f0 /* Write-only. */
/* The content of FDC37M60X_CONFIG_REG_LDN (index 0x07) must be set to the
LDN the register belongs to, before you can access the register. */
static void fdc37m60x_sio_write(uint8_t ldn, uint8_t index, uint8_t value)
{
outb(FDC37M60X_CONFIG_REG_LDN, SIO_BASE);
outb(ldn, SIO_DATA);
outb(index, SIO_BASE);
outb(value, SIO_DATA);
}
/* Enable the peripheral devices on the FDC37M60X Super I/O chip. */
static void fdc37m60x_enable_serial(device_t dev, unsigned iobase)
{
/* (1) Enter the configuration state. */
outb(0x55, FDC37M60X_CONFIGURATION_PORT);
/* (2) Modify the data of configuration registers. */
/* Power on all devices by setting the respective bit.
Bits: 0 (FDC), 3 (PP), 4 (Com1), 5 (Com2). The rest is reserved. */
fdc37m60x_sio_write(0x00, FDC37M60X_CONFIG_POWER_CONTROL, 0x39);
/* Disable intelligent power management. */
fdc37m60x_sio_write(0x00, FDC37M60X_CONFIG_POWER_MGMT, 0x00);
/* Turn on OSC, turn on BRG clock. */
fdc37m60x_sio_write(0x00, FDC37M60X_CONFIG_OSC, 0x04);
/* Configure serial port 1. */
fdc37m60x_sio_write(FDC37M60X_SP1, 0x60, 0x03);
fdc37m60x_sio_write(FDC37M60X_SP1, 0x61, 0xf8); /* I/O 0x3f8 */
fdc37m60x_sio_write(FDC37M60X_SP1, 0x70, 0x04); /* IRQ 4 */
fdc37m60x_sio_write(FDC37M60X_SP1, 0xf0, 0x00); /* Normal */
/* Enable serial port 1. */
fdc37m60x_sio_write(FDC37M60X_SP1, 0x30, 0x01);
/* (3) Exit the configuration state. */
outb(0xaa, FDC37M60X_CONFIGURATION_PORT);
}
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