src/mainboard/google/guado/chromeos.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2014 Google 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.
 */

#include <string.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <console/console.h>
#include <vendorcode/google/chromeos/chromeos.h>
#include <ec/google/chromeec/ec.h>
#include <soc/gpio.h>
#include <soc/sata.h>

#define GPIO_SPI_WP	58
#define GPIO_REC_MODE	12

#define FLAG_SPI_WP	0
#define FLAG_REC_MODE	1
#define FLAG_DEV_MODE	2

#ifndef __PRE_RAM__
#include <boot/coreboot_tables.h>

#define GPIO_COUNT	6

void fill_lb_gpios(struct lb_gpios *gpios)
{
	struct lb_gpio *gpio;

	gpios->size = sizeof(*gpios) + (GPIO_COUNT * sizeof(struct lb_gpio));
	gpios->count = GPIO_COUNT;

	gpio = gpios->gpios;
	fill_lb_gpio(gpio++, GPIO_SPI_WP, ACTIVE_HIGH, "write protect", 0);
	fill_lb_gpio(gpio++, GPIO_REC_MODE, ACTIVE_LOW, "recovery",
		     get_recovery_mode_switch());
	fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "developer",
		     get_developer_mode_switch());
	fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "lid", 1);
	fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "power", 0);
	fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "oprom", gfx_get_init_done());
}
#endif

int get_write_protect_state(void)
{
	device_t dev;
#ifdef __PRE_RAM__
	dev = PCI_DEV(0, 0x1f, 2);
#else
	dev = dev_find_slot(0, PCI_DEVFN(0x1f, 2));
#endif
	return (pci_read_config32(dev, SATA_SP) >> FLAG_SPI_WP) & 1;
}

int get_developer_mode_switch(void)
{
	return 0;
}

int get_recovery_mode_switch(void)
{
	device_t dev;
#ifdef __PRE_RAM__
	dev = PCI_DEV(0, 0x1f, 2);
#else
	dev = dev_find_slot(0, PCI_DEVFN(0x1f, 2));
#endif
	return (pci_read_config32(dev, SATA_SP) >> FLAG_REC_MODE) & 1;
}

#ifdef __PRE_RAM__
void save_chromeos_gpios(void)
{
	u32 flags = 0;

	/* Write Protect: GPIO58 = GPIO_SPI_WP, active high */
	if (get_gpio(GPIO_SPI_WP))
		flags |= (1 << FLAG_SPI_WP);

	/* Recovery: GPIO12 = RECOVERY_L, active low */
	if (!get_gpio(GPIO_REC_MODE))
		flags |= (1 << FLAG_REC_MODE);

	/* Developer: Virtual */

	pci_write_config32(PCI_DEV(0, 0x1f, 2), SATA_SP, flags);
}
#endif