58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/*
|
|
* This file is part of the coreboot project.
|
|
*
|
|
*
|
|
* 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 <bootmode.h>
|
|
#include <boot/coreboot_tables.h>
|
|
#include <soc/gpio.h>
|
|
#include <vendorcode/google/chromeos/chromeos.h>
|
|
|
|
/* The WP status pin lives on GPIO_SSUS_6 which is pad 36 in the SUS well. */
|
|
#define WP_STATUS_PAD 36
|
|
|
|
void fill_lb_gpios(struct lb_gpios *gpios)
|
|
{
|
|
struct lb_gpio chromeos_gpios[] = {
|
|
{-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));
|
|
}
|
|
|
|
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. The
|
|
* hardware defaults to an input but there is a 20K pulldown. Externally
|
|
* there is a 10K pullup. Disable the internal pull in romstage so that
|
|
* there isn't any ambiguity in the reading.
|
|
*/
|
|
if (ENV_ROMSTAGE)
|
|
ssus_disable_internal_pull(WP_STATUS_PAD);
|
|
|
|
/* WP is enabled when the pin is reading high. */
|
|
return ssus_get_gpio(WP_STATUS_PAD);
|
|
}
|
|
|
|
static const struct cros_gpio cros_gpios[] = {
|
|
CROS_GPIO_REC_AL(CROS_GPIO_VIRTUAL, CROS_GPIO_DEVICE_NAME),
|
|
CROS_GPIO_WP_AH(0x2006, CROS_GPIO_DEVICE_NAME),
|
|
};
|
|
|
|
void mainboard_chromeos_acpi_generate(void)
|
|
{
|
|
chromeos_acpi_gpio_generate(cros_gpios, ARRAY_SIZE(cros_gpios));
|
|
}
|