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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google Inc.
* Copyright (C) 2015 Intel Corp.
*
* 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 <arch/io.h>
#include <gpio.h>
#include <soc/gpio.h>
#include <string.h>
#include <vendorcode/google/chromeos/chromeos.h>
/* The WP status pin lives on MF_ISH_GPIO_4 */
#define WP_STATUS_PAD_CFG0 0x4838
#define WP_STATUS_PAD_CFG1 0x483C
#define WP_GPIO GP_E_22
#if ENV_RAMSTAGE
#include <boot/coreboot_tables.h>
#define ACTIVE_LOW 0
#define ACTIVE_HIGH 1
void fill_lb_gpios(struct lb_gpios *gpios)
{
struct lb_gpio chromeos_gpios[] = {
{-1, ACTIVE_HIGH, get_write_protect_state(), "write protect"},
{-1, ACTIVE_HIGH, vboot_recovery_mode_enabled(), "recovery"},
{-1, ACTIVE_HIGH, get_lid_switch(), "lid"},
{-1, ACTIVE_HIGH, 0, "power"},
{-1, ACTIVE_HIGH, gfx_get_init_done(), "oprom"},
};
lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
}
#endif /* ENV_RAMSTAGE */
int get_write_protect_state(void)
{
/*
* The vboot loader queries this function in romstage. The GPIOs have
* not been set up yet as that configuration is done in ramstage.
* Configuring this GPIO as input so that there isn't any ambiguity
* in the reading.
*/
#if ENV_ROMSTAGE
if (IS_ENABLED(CONFIG_BOARD_GOOGLE_CYAN)) {
write32((void *)(COMMUNITY_GPEAST_BASE + WP_STATUS_PAD_CFG0),
(PAD_PULL_UP_20K | PAD_GPIO_ENABLE | PAD_CONFIG0_GPI_DEFAULT));
write32((void *)(COMMUNITY_GPEAST_BASE + WP_STATUS_PAD_CFG1),
PAD_CONFIG1_DEFAULT0);
} else {
gpio_input_pullup(WP_GPIO);
}
#endif
/* WP is enabled when the pin is reading high. */
if (IS_ENABLED(CONFIG_BOARD_GOOGLE_CYAN)) {
return (read32((void *)(COMMUNITY_GPEAST_BASE + WP_STATUS_PAD_CFG0))
& PAD_VAL_HIGH);
} else {
return !!gpio_get(WP_GPIO);
}
}
static const struct cros_gpio cros_gpios[] = {
CROS_GPIO_REC_AL(CROS_GPIO_VIRTUAL, CROS_GPIO_DEVICE_NAME),
CROS_GPIO_WP_AH(0x10013, CROS_GPIO_DEVICE_NAME),
};
void mainboard_chromeos_acpi_generate(void)
{
chromeos_acpi_gpio_generate(cros_gpios, ARRAY_SIZE(cros_gpios));
}
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