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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 <arch/io.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 GPIO_DEV_MODE 17
#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)
{
device_t dev = dev_find_slot(0, PCI_DEVFN(0x1f,0));
u16 gen_pmcon_1 = pci_read_config32(dev, GEN_PMCON_1);
gpios->size = sizeof(*gpios) + (GPIO_COUNT * sizeof(struct lb_gpio));
gpios->count = GPIO_COUNT;
/* Write Protect: GPIO68 = CHP3_SPI_WP */
gpios->gpios[0].port = GPIO_SPI_WP;
gpios->gpios[0].polarity = ACTIVE_HIGH;
gpios->gpios[0].value = get_write_protect_state();
strncpy((char *)gpios->gpios[0].name,"write protect",
GPIO_MAX_NAME_LENGTH);
/* Recovery: GPIO42 = CHP3_REC_MODE# */
gpios->gpios[1].port = GPIO_REC_MODE;
gpios->gpios[1].polarity = ACTIVE_LOW;
gpios->gpios[1].value = !get_recovery_mode_switch();
strncpy((char *)gpios->gpios[1].name,"recovery", GPIO_MAX_NAME_LENGTH);
/* Developer: GPIO17 = KBC3_DVP_MODE */
gpios->gpios[2].port = GPIO_DEV_MODE;
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);
/* Hard code the lid switch GPIO to open. */
gpios->gpios[3].port = 100;
gpios->gpios[3].polarity = ACTIVE_HIGH;
gpios->gpios[3].value = 1;
strncpy((char *)gpios->gpios[3].name,"lid", GPIO_MAX_NAME_LENGTH);
/* Power Button */
gpios->gpios[4].port = 101;
gpios->gpios[4].polarity = ACTIVE_LOW;
gpios->gpios[4].value = (gen_pmcon_1 >> 9) & 1;
strncpy((char *)gpios->gpios[4].name,"power", GPIO_MAX_NAME_LENGTH);
/* Did we load the VGA Option ROM? */
gpios->gpios[5].port = -1; /* Indicate that this is a pseudo GPIO */
gpios->gpios[5].polarity = ACTIVE_HIGH;
gpios->gpios[5].value = gfx_get_init_done();
strncpy((char *)gpios->gpios[5].name,"oprom", GPIO_MAX_NAME_LENGTH);
}
#endif
int get_write_protect_state(void)
{
#ifdef __SIMPLE_DEVICE__
pci_devfn_t dev;
dev = PCI_DEV(0, 0x1f, 2);
#else
device_t dev;
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)
{
#ifdef __SIMPLE_DEVICE__
pci_devfn_t dev;
dev = PCI_DEV(0, 0x1f, 2);
#else
device_t dev;
dev = dev_find_slot(0, PCI_DEVFN(0x1f, 2));
#endif
return (pci_read_config32(dev, SATA_SP) >> FLAG_DEV_MODE) & 1;
}
int get_recovery_mode_switch(void)
{
#ifdef __SIMPLE_DEVICE__
pci_devfn_t dev;
dev = PCI_DEV(0, 0x1f, 2);
#else
device_t dev;
dev = dev_find_slot(0, PCI_DEVFN(0x1f, 2));
#endif
return (pci_read_config32(dev, SATA_SP) >> FLAG_REC_MODE) & 1;
}
void init_bootmode_straps(void)
{
#ifdef __PRE_RAM__
u32 flags = 0;
/* 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);
/* Developer: GPIO17 = KBC3_DVP_MODE, active high */
if (get_gpio(GPIO_DEV_MODE))
flags |= (1 << FLAG_DEV_MODE);
pci_write_config32(PCI_DEV(0, 0x1f, 2), SATA_SP, flags);
#endif
}
static const struct cros_gpio cros_gpios[] = {
CROS_GPIO_REC_AL(GPIO_REC_MODE, CROS_GPIO_DEVICE_NAME),
CROS_GPIO_DEV_AH(GPIO_DEV_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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