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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2012 Advanced Micro Devices, Inc.
*
* 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.
*/
#include <arch/io.h>
#include <device/pnp_def.h>
#include <stdint.h>
#include "w83627dhg.h"
void pnp_enter_ext_func_mode(pnp_devfn_t dev)
{
u16 port = dev >> 8;
outb(0x87, port);
outb(0x87, port);
}
void pnp_exit_ext_func_mode(pnp_devfn_t dev)
{
u16 port = dev >> 8;
outb(0xaa, port);
}
/**
* Select Pin 89, Pin 90 function as I2C interface SDA, SCL.
* {Pin 89, Pin 90} function can be selected as {GP33, GP32}, or
* {RSTOUT3#, RSTOUT2#} or {SDA, SCL}
*/
void w83627dhg_enable_i2c(pnp_devfn_t dev)
{
u8 val;
pnp_enter_ext_func_mode(dev);
pnp_set_logical_device(dev);
val = pnp_read_config(dev, 0x2A);
val |= 1 << 1;
pnp_write_config(dev, 0x2A, val);
pnp_exit_ext_func_mode(dev);
}
void w83627dhg_set_clksel_48(pnp_devfn_t dev)
{
u8 reg8;
pnp_enter_ext_func_mode(dev);
reg8 = pnp_read_config(dev, 0x24);
reg8 |= (1 << 6); /* Set CLKSEL (clock input on pin 1) to 48MHz. */
pnp_write_config(dev, 0x24, reg8);
pnp_exit_ext_func_mode(dev);
}
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