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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 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.
*/
#include <string.h>
#include <bootmode.h>
#include <boot/coreboot_tables.h>
#include <device/pci_ops.h>
#include <device/device.h>
#include <device/pci.h>
#include <southbridge/intel/bd82x6x/pch.h>
#include <southbridge/intel/common/gpio.h>
#include <vendorcode/google/chromeos/chromeos.h>
#define GPIO_SPI_WP 68
#define GPIO_REC_MODE 42
#define FLAG_SPI_WP 0
#define FLAG_REC_MODE 1
void fill_lb_gpios(struct lb_gpios *gpios)
{
pci_devfn_t dev = PCI_DEV(0, 0x1f, 0);
u16 gen_pmcon_1 = pci_s_read_config32(dev, GEN_PMCON_1);
struct lb_gpio chromeos_gpios[] = {
/* Write Protect: GPIO68 = CHP3_SPI_WP */
{GPIO_SPI_WP, ACTIVE_HIGH, get_write_protect_state(),
"write protect"},
/* Recovery: GPIO42 = CHP3_REC_MODE# */
{GPIO_REC_MODE, ACTIVE_LOW, !get_recovery_mode_switch(),
"presence"},
/* Hard code the lid switch GPIO to open. */
{100, ACTIVE_HIGH, 1, "lid"},
/* Power Button */
{101, ACTIVE_LOW, (gen_pmcon_1 >> 9) & 1, "power"},
/* Did we load the VGA Option ROM? */
/* -1 indicates that this is a pseudo GPIO */
{-1, ACTIVE_HIGH, gfx_get_init_done(), "oprom"},
};
lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
}
int get_write_protect_state(void)
{
pci_devfn_t dev = PCI_DEV(0, 0x1f, 2);
return (pci_s_read_config32(dev, SATA_SP) >> FLAG_SPI_WP) & 1;
}
int get_recovery_mode_switch(void)
{
pci_devfn_t dev = PCI_DEV(0, 0x1f, 2);
return (pci_s_read_config32(dev, SATA_SP) >> FLAG_REC_MODE) & 1;
}
void init_bootmode_straps(void)
{
u32 flags = 0;
pci_devfn_t dev = PCI_DEV(0, 0x1f, 2);
/* Write Protect: GPIO68 = CHP3_SPI_WP, active high */
if (get_gpio(GPIO_SPI_WP))
flags |= (1 << FLAG_SPI_WP);
/* Recovery: GPIO42 = CHP3_REC_MODE#, active low */
if (!get_gpio(GPIO_REC_MODE))
flags |= (1 << FLAG_REC_MODE);
pci_s_write_config32(dev, SATA_SP, flags);
}
static const struct cros_gpio cros_gpios[] = {
CROS_GPIO_REC_AL(GPIO_REC_MODE, CROS_GPIO_DEVICE_NAME),
CROS_GPIO_WP_AH(GPIO_SPI_WP, CROS_GPIO_DEVICE_NAME),
};
void mainboard_chromeos_acpi_generate(void)
{
chromeos_acpi_gpio_generate(cros_gpios, ARRAY_SIZE(cros_gpios));
}
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