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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 Sven Schnelle <svens@stackframe.org>
*
* 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 <console/console.h>
#include <device/device.h>
#include <arch/io.h>
#include <boot/tables.h>
#include <delay.h>
#include <arch/io.h>
#include "dock.h"
#include "superio/nsc/pc87384/pc87384.h"
#include "ec/acpi/ec.h"
#include "southbridge/intel/i82801gx/i82801gx.h"
static void dlpc_write_register(int reg, int value)
{
outb(reg, 0x164e);
outb(value, 0x164f);
}
static u8 dlpc_read_register(int reg)
{
outb(reg, 0x164e);
return inb(0x164f);
}
static void dock_write_register(int reg, int value)
{
outb(reg, 0x2e);
outb(value, 0x2f);
}
static u8 dock_read_register(int reg)
{
outb(reg, 0x2e);
return inb(0x2f);
}
static void dlpc_gpio_set_mode(int port, int mode)
{
dlpc_write_register(0xf0, port);
dlpc_write_register(0xf1, mode);
}
static void dock_gpio_set_mode(int port, int mode, int irq)
{
dock_write_register(0xf0, port);
dock_write_register(0xf1, mode);
dock_write_register(0xf2, irq);
}
static void dlpc_gpio_init(void)
{
/* Select GPIO module */
dlpc_write_register(0x07, 0x07);
/* GPIO Base Address 0x1680 */
dlpc_write_register(0x60, 0x16);
dlpc_write_register(0x61, 0x80);
/* Activate GPIO */
dlpc_write_register(0x30, 0x01);
dlpc_gpio_set_mode(0x00, 3);
dlpc_gpio_set_mode(0x01, 3);
dlpc_gpio_set_mode(0x02, 0);
dlpc_gpio_set_mode(0x03, 3);
dlpc_gpio_set_mode(0x04, 4);
dlpc_gpio_set_mode(0x20, 4);
dlpc_gpio_set_mode(0x21, 4);
dlpc_gpio_set_mode(0x23, 4);
}
int dlpc_init(void)
{
int timeout = 1000;
/* Enable 14.318MHz CLK on CLKIN */
dlpc_write_register(0x29, 0xa0);
while(!(dlpc_read_register(0x29) & 0x10) && timeout--)
udelay(1000);
if (!timeout)
return 1;
/* Select DLPC module */
dlpc_write_register(0x07, 0x19);
/* DLPC Base Address 0x164c */
dlpc_write_register(0x60, 0x16);
dlpc_write_register(0x61, 0x4c);
/* Activate DLPC */
dlpc_write_register(0x30, 0x01);
dlpc_gpio_init();
return 0;
}
static int dock_superio_init(void)
{
int timeout = 1000;
/* startup 14.318MHz Clock */
dock_write_register(0x29, 0xa0);
/* wait until clock is settled */
while(!(dock_read_register(0x29) & 0x10) && timeout--)
udelay(1000);
if (!timeout)
return 1;
/* set GPIO pins to Serial/Parallel Port
* functions
*/
dock_write_register(0x22, 0xeb);
dock_write_register(0x07, PC87384_GPIO);
dock_write_register(0x60, 0x16);
dock_write_register(0x61, 0x20);
dock_gpio_set_mode(0x00, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
dock_gpio_set_mode(0x01, PC87384_GPIO_PIN_TYPE_PUSH_PULL |
PC87384_GPIO_PIN_OE, 0x00);
dock_gpio_set_mode(0x02, PC87384_GPIO_PIN_TYPE_PUSH_PULL |
PC87384_GPIO_PIN_OE, 0x00);
dock_gpio_set_mode(0x03, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
dock_gpio_set_mode(0x04, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
dock_gpio_set_mode(0x05, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
dock_gpio_set_mode(0x06, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
dock_gpio_set_mode(0x07, PC87384_GPIO_PIN_DEBOUNCE |
PC87384_GPIO_PIN_PULLUP, 0x00);
outb(0xfd, 0x1620);
/* no GPIO events enabled for PORT0 */
outb(0x00, 0x1622);
/* clear GPIO events on PORT0 */
outb(0xff, 0x1623);
outb(0xff, 0x1624);
/* no GPIO events enabled for PORT1 */
outb(0x00, 0x1626);
/* clear GPIO events on PORT1*/
outb(0xff, 0x1627);
outb(0x1F, 0x1628);
/* enable GPIO */
dock_write_register(0x30, 0x01);
return 0;
}
int dock_connect(void)
{
int timeout = 1000;
outb(0x07, 0x164c);
timeout = 1000;
while(!(inb(0x164c) & 8) && timeout--)
udelay(1000);
if (!timeout) {
/* docking failed, disable DLPC switch */
outb(0x00, 0x164c);
dlpc_write_register(0x30, 0x00);
return 1;
}
/* Assert D_PLTRST# */
outb(0xfe, 0x1680);
udelay(1000);
/* Deassert D_PLTRST# */
outb(0xff, 0x1680);
udelay(10000);
return dock_superio_init();
}
void dock_disconnect(void)
{
/* disconnect LPC bus */
outb(0x00, 0x164c);
/* Assert PLTRST and DLPCPD */
outb(0xfc, 0x1680);
}
int dock_present(void)
{
outb(0x61, 0x15ec);
return inb(0x15ee) & 1;
}
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