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/* Copyright 2016 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* EC software sync for verified boot
*/
#ifndef VBOOT_REFERENCE_2EC_SYNC_H_
#define VBOOT_REFERENCE_2EC_SYNC_H_
#include "2api.h"
#include "vboot_api.h"
/**
* EC sync, phase 1
*
* This checks whether the EC is running the correct image to do EC sync, and
* whether any updates are necessary.
*
* @param ctx Vboot2 context
* @return VB2_SUCCESS, VBERROR_EC_REBOOT_TO_RO_REQUIRED if the EC must
* reboot back to its RO code to continue EC sync, or other non-zero error
* code.
*/
vb2_error_t ec_sync_phase1(struct vb2_context *ctx);
/**
* Returns non-zero if the EC will perform a slow update during phase 2.
*
* This is only valid after calling ec_sync_phase1(), before calling
* ec_sync_phase2().
*
* @param ctx Vboot2 context
* @return non-zero if a slow update will be done; zero if no update or a
* fast update.
*/
int ec_will_update_slowly(struct vb2_context *ctx);
/**
* Check if auxiliary firmware blobs need to be updated.
*
* @param ctx Vboot2 context
* @param severity VB_AUX_FW_{NO,FAST,SLOW}_UPDATE
* @return VB2_SUCCESS or non-zero error code.
*/
vb2_error_t ec_sync_check_aux_fw(struct vb2_context *ctx,
VbAuxFwUpdateSeverity_t *severity);
/**
* Update and protect auxiliary firmware.
*
* @param ctx Vboot2 context
* @return VB2_SUCCESS or non-zero error code.
*/
vb2_error_t ec_sync_update_aux_fw(struct vb2_context *ctx);
/**
* EC sync, phase 2
*
* This updates the EC if necessary, makes sure it has protected its image(s),
* and makes sure it has jumped to the correct image.
*
* If ec_will_update_slowly(), it is suggested that the caller display a
* warning screen before calling phase 2.
*
* @param ctx Vboot2 context
* @return VB2_SUCCESS, VBERROR_EC_REBOOT_TO_RO_REQUIRED if the EC must
* reboot back to its RO code to continue EC sync, or other non-zero error
* code.
*/
vb2_error_t ec_sync_phase2(struct vb2_context *ctx);
/**
* EC sync, phase 3
*
* This completes EC sync and handles battery cutoff if needed.
*
* @param ctx Vboot2 context
* @return VB2_SUCCESS or non-zero error code.
*/
vb2_error_t ec_sync_phase3(struct vb2_context *ctx);
/**
* Sync all EC devices to expected versions.
*
* This is a high-level function which calls the functions above.
*
* @param ctx Vboot context
* @return VB2_SUCCESS, or non-zero if error.
*/
vb2_error_t ec_sync_all(struct vb2_context *ctx);
#endif /* VBOOT_REFERENCE_2EC_SYNC_H_ */
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