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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011-2012 The ChromiumOS Authors. All rights reserved.
*
* 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 <string.h>
#include <vendorcode/google/chromeos/chromeos.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <southbridge/intel/bd82x6x/pch.h>
#include <ec/quanta/ene_kb3940q/ec.h>
#include "ec.h"
#define ACTIVE_LOW 0
#define ACTIVE_HIGH 1
#define WP_GPIO 6
#define DEVMODE_GPIO 54
#define FORCE_RECOVERY_MODE 0
#define FORCE_DEVELOPER_MODE 0
int get_pch_gpio(unsigned char gpio_num);
#ifndef __PRE_RAM__
#include <boot/coreboot_tables.h>
#include <arch/coreboot_tables.h>
#define GPIO_COUNT 6
void fill_lb_gpios(struct lb_gpios *gpios)
{
device_t dev = dev_find_slot(0, PCI_DEVFN(0x1f,0));
u16 gpio_base = pci_read_config16(dev, GPIOBASE) & 0xfffe;
int lidswitch=0;
if (!gpio_base)
return;
gpios->size = sizeof(*gpios) + (GPIO_COUNT * sizeof(struct lb_gpio));
gpios->count = GPIO_COUNT;
/* Write Protect: GPIO active Low */
gpios->gpios[0].port = WP_GPIO;
gpios->gpios[0].polarity = ACTIVE_LOW;
gpios->gpios[0].value = get_pch_gpio(WP_GPIO);
strncpy((char *)gpios->gpios[0].name,"write protect",
GPIO_MAX_NAME_LENGTH);
/* Recovery: virtual GPIO active high */
gpios->gpios[1].port = -1;
gpios->gpios[1].polarity = ACTIVE_HIGH;
gpios->gpios[1].value = get_recovery_mode_switch();
strncpy((char *)gpios->gpios[1].name,"recovery", GPIO_MAX_NAME_LENGTH);
/* Developer: virtual GPIO active high */
gpios->gpios[2].port = -1;
gpios->gpios[2].polarity = ACTIVE_HIGH;
gpios->gpios[2].value = get_developer_mode_switch();
strncpy((char *)gpios->gpios[2].name,"developer",
GPIO_MAX_NAME_LENGTH);
/* lid switch value from EC */
lidswitch = (ec_mem_read(EC_HW_GPI_STATUS) >> EC_GPI_LID_STAT_BIT) & 1;
gpios->gpios[3].port = -1;
gpios->gpios[3].polarity = ACTIVE_HIGH;
gpios->gpios[3].value = lidswitch;
strncpy((char *)gpios->gpios[3].name,"lid", GPIO_MAX_NAME_LENGTH);
printk(BIOS_DEBUG,"LID SWITCH FROM EC: %x\n", lidswitch);
/* Power Button - Hardcode Low as power button may still be pressed
when read here.*/
gpios->gpios[4].port = -1;
gpios->gpios[4].polarity = ACTIVE_HIGH;
gpios->gpios[4].value = 0;
strncpy((char *)gpios->gpios[4].name,"power", GPIO_MAX_NAME_LENGTH);
/* Was VGA Option ROM loaded? */
gpios->gpios[5].port = -1; /* Indicate that this is a pseudo GPIO */
gpios->gpios[5].polarity = ACTIVE_HIGH;
gpios->gpios[5].value = oprom_is_loaded;
strncpy((char *)gpios->gpios[5].name,"oprom", GPIO_MAX_NAME_LENGTH);
}
#endif
int get_pch_gpio(unsigned char gpio_num)
{
device_t dev;
int retval = 0;
#ifdef __PRE_RAM__
dev = PCI_DEV(0, 0x1f, 0);
#else
dev = dev_find_slot(0, PCI_DEVFN(0x1f,0));
#endif
u16 gpio_base = pci_read_config16(dev, GPIOBASE) & 0xfffe;
if (!gpio_base)
return(0);
if (gpio_num > 64){
u32 gp_lvl3 = inl(gpio_base + GP_LVL3);
retval = ((gp_lvl3 >> (gpio_num - 64)) & 1);
} else if (gpio_num > 32){
u32 gp_lvl2 = inl(gpio_base + GP_LVL2);
retval = ((gp_lvl2 >> (gpio_num - 32)) & 1);
} else {
u32 gp_lvl = inl(gpio_base + GP_LVL);
retval = ((gp_lvl >> gpio_num) & 1);
}
return retval;
}
int get_developer_mode_switch(void)
{
int dev_mode = 0;
#if FORCE_DEVELOPER_MODE
printk(BIOS_DEBUG,"FORCING DEVELOPER MODE.\n");
return 1;
#endif
/* Servo GPIO is active low, reverse it for intial state (request) */
dev_mode = !get_pch_gpio(DEVMODE_GPIO);
printk(BIOS_DEBUG,"DEVELOPER MODE FROM GPIO %d: %x\n",DEVMODE_GPIO,
dev_mode);
return dev_mode;
}
int get_recovery_mode_switch(void)
{
int ec_rec_mode = 0;
#if FORCE_RECOVERY_MODE
printk(BIOS_DEBUG,"FORCING RECOVERY MODE.\n");
return 1;
#endif
#ifndef __PRE_RAM__
if (ec_mem_read(EC_CODE_STATE) == EC_COS_EC_RO) {
ec_rec_mode = 1;
}
printk(BIOS_DEBUG,"RECOVERY MODE FROM EC: %x\n", ec_rec_mode);
#endif
return ec_rec_mode;
}
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