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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Rockchip 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; 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.
*/
#include <boot/coreboot_tables.h>
#include <console/console.h>
#include <gpio.h>
#include <string.h>
#include <vendorcode/google/chromeos/chromeos.h>
#include "board.h"
#define GPIO_WP GPIO(7, A, 6)
#define GPIO_POWER GPIO(0, A, 5)
#define GPIO_RECOVERY_SERVO GPIO(0, B, 1)
#define GPIO_RECOVERY_PUSHKEY GPIO(7, B, 1)
#define GPIO_DEVELOPER_SWITCH GPIO(7, B, 2)
void setup_chromeos_gpios(void)
{
gpio_input(GPIO_WP);
gpio_input(GPIO_POWER);
gpio_input_pullup(GPIO_RECOVERY_SERVO);
gpio_input_pullup(GPIO_RECOVERY_PUSHKEY);
gpio_input(GPIO_DEVELOPER_SWITCH); // board has pull up/down resistor.
}
void fill_lb_gpios(struct lb_gpios *gpios)
{
int count = 0;
/* Write Protect: active low */
gpios->gpios[count].port = GPIO_WP.raw;
gpios->gpios[count].polarity = ACTIVE_LOW;
gpios->gpios[count].value = gpio_get(GPIO_WP);
strncpy((char *)gpios->gpios[count].name, "write protect",
GPIO_MAX_NAME_LENGTH);
count++;
/* Recovery: active low */
/* Note for early development, we want to support both servo and
* pushkey recovery buttons in firmware boot stages.
*/
gpios->gpios[count].port = GPIO_RECOVERY_PUSHKEY.raw;
gpios->gpios[count].polarity = ACTIVE_LOW;
gpios->gpios[count].value = !get_recovery_mode_switch();
strncpy((char *)gpios->gpios[count].name, "recovery",
GPIO_MAX_NAME_LENGTH);
count++;
/* Power Button: GPIO active low */
gpios->gpios[count].port = GPIO_POWER.raw;
gpios->gpios[count].polarity = ACTIVE_LOW;
gpios->gpios[count].value = -1;
strncpy((char *)gpios->gpios[count].name, "power",
GPIO_MAX_NAME_LENGTH);
count++;
/* Developer: GPIO active high */
gpios->gpios[count].port = GPIO_DEVELOPER_SWITCH.raw;
gpios->gpios[count].polarity = ACTIVE_HIGH;
gpios->gpios[count].value = get_developer_mode_switch();
strncpy((char *)gpios->gpios[count].name, "developer",
GPIO_MAX_NAME_LENGTH);
count++;
/* Reset: GPIO active high (output) */
gpios->gpios[count].port = GPIO_RESET.raw;
gpios->gpios[count].polarity = ACTIVE_HIGH;
gpios->gpios[count].value = -1;
strncpy((char *)gpios->gpios[count].name, "reset",
GPIO_MAX_NAME_LENGTH);
count++;
gpios->size = sizeof(*gpios) + (count * sizeof(struct lb_gpio));
gpios->count = count;
printk(BIOS_ERR, "Added %d GPIOS size %d\n", count, gpios->size);
}
int get_developer_mode_switch(void)
{
// GPIO_DEVELOPER_SWITCH is active high.
return gpio_get(GPIO_DEVELOPER_SWITCH);
}
int get_recovery_mode_switch(void)
{
// Both RECOVERY_SERVO and RECOVERY_PUSHKEY are low active.
return !(gpio_get(GPIO_RECOVERY_SERVO) &&
gpio_get(GPIO_RECOVERY_PUSHKEY));
}
int get_write_protect_state(void)
{
return !gpio_get(GPIO_WP);
}
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