chromeos.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <bootmode.h>
#include <boot/coreboot_tables.h>
#include <device/mmio.h>
#include <gpio.h>
#include <soc/gpio.h>
#include <types.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
 
#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_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.
         * Configuring this GPIO as input so that there isn't any ambiguity
         * in the reading.
         */
#if ENV_ROMSTAGE
        if (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 (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),
};
DECLARE_CROS_GPIOS(cros_gpios);
 
int get_ec_is_trusted(void)
{
        /* Do not have a Chrome EC involved in entering recovery mode;
           Always return trusted. */
        return 1;
}