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