/* SPDX-License-Identifier: GPL-2.0-only */ #include <bootmode.h> #include <boot/coreboot_tables.h> #include <gpio.h> #include <soc/gpio.h> #include <variant/gpio.h> #include <types.h> #include <vendorcode/google/chromeos/chromeos.h> #include <security/tpm/tss.h> #include <device/device.h> #include <intelblocks/pmclib.h> #include <soc/pmc.h> #include <soc/pci_devs.h> enum rec_mode_state { REC_MODE_UNINITIALIZED, REC_MODE_NOT_REQUESTED, REC_MODE_REQUESTED, }; 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"}, {-1, ACTIVE_HIGH, 0, "EC in RW"}, }; lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios)); } int get_write_protect_state(void) { return gpio_get(GPP_E15); } static bool raw_get_recovery_mode_switch(void) { return !gpio_get(GPP_E8); } int get_recovery_mode_switch(void) { static enum rec_mode_state saved_rec_mode = REC_MODE_UNINITIALIZED; enum rec_mode_state state = REC_MODE_NOT_REQUESTED; uint8_t cr50_state = 0; /* Check cached state, since TPM will only tell us the first time */ if (saved_rec_mode != REC_MODE_UNINITIALIZED) return saved_rec_mode == REC_MODE_REQUESTED; /* * Read one-time recovery request from cr50 in verstage only since * the TPM driver won't be set up in time for other stages like romstage * and the value from the TPM would be wrong anyway since the verstage * read would have cleared the value on the TPM. * * The TPM recovery request is passed between stages through vboot data * or cbmem depending on stage. */ if (ENV_SEPARATE_VERSTAGE && tlcl_cr50_get_recovery_button(&cr50_state) == TPM_SUCCESS && cr50_state) state = REC_MODE_REQUESTED; /* Read state from the GPIO controlled by servo. */ if (raw_get_recovery_mode_switch()) state = REC_MODE_REQUESTED; /* Store the state in case this is called again in verstage. */ saved_rec_mode = state; return state == REC_MODE_REQUESTED; } int get_lid_switch(void) { return 1; } void mainboard_prepare_cr50_reset(void) { #if ENV_RAMSTAGE /* Ensure system powers up after CR50 reset */ pmc_soc_set_afterg3_en(true); #endif } int get_ec_is_trusted(void) { /* Do not have a Chrome EC involved in entering recovery mode; Always return trusted. */ return 1; }