88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
/* Copyright 2018 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* CCD factory enable */
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#include "ccd_config.h"
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#include "console.h"
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#include "extension.h"
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#include "hooks.h"
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#include "system.h"
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#include "tpm_registers.h"
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#include "tpm_vendor_cmds.h"
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#define CPRINTS(format, args...) cprints(CC_CCD, format, ## args)
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static uint8_t wait_for_factory_ccd_change;
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static uint8_t reset_required_;
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static void factory_config_saved(int saved)
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{
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wait_for_factory_ccd_change = 0;
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CPRINTS("%s: %s%s", __func__, saved ? "done" : "failed",
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reset_required_ ? ", rebooting" : "");
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if (!reset_required_)
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return;
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cflush();
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system_reset(SYSTEM_RESET_HARD);
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}
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static void ccd_config_changed(void)
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{
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if (!wait_for_factory_ccd_change)
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return;
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factory_config_saved(1);
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}
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DECLARE_HOOK(HOOK_CCD_CHANGE, ccd_config_changed, HOOK_PRIO_LAST);
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static void force_system_reset(void)
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{
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CPRINTS("%s: ccd hook didn't reset the system");
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factory_config_saved(0);
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}
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DECLARE_DEFERRED(force_system_reset);
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static void factory_enable_deferred(void)
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{
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int rv;
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if (board_wipe_tpm(reset_required_) != EC_SUCCESS)
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return;
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CPRINTS("%s: TPM reset done, enabling factory mode", __func__);
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wait_for_factory_ccd_change = 1;
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rv = ccd_reset_config(CCD_RESET_FACTORY);
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if (rv != EC_SUCCESS)
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factory_config_saved(0);
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if (reset_required_) {
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/*
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* Cr50 will reset once factory mode is enabled. If it hasn't in
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* TPM_RESET_TIME, declare factory enable failed and force the
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* reset.
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*/
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hook_call_deferred(&force_system_reset_data, TPM_RESET_TIME);
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}
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}
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DECLARE_DEFERRED(factory_enable_deferred);
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void enable_ccd_factory_mode(int reset_required)
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{
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/*
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* Wiping the TPM may take a while. Delay sleep long enough for the
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* factory enable process to finish.
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*/
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delay_sleep_by(DISABLE_SLEEP_TIME_TPM_WIPE);
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reset_required_ |= !!reset_required;
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hook_call_deferred(&factory_enable_deferred_data,
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TPM_PROCESSING_TIME);
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}
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