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/* Copyright (c) 2013 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 routines for vboot
*/
#include "2sysincludes.h"
#include "2common.h"
#include "2misc.h"
#include "2nvstorage.h"
#include "sysincludes.h"
#include "ec_sync.h"
#include "vboot_api.h"
#include "vboot_common.h"
#include "vboot_display.h"
#include "vboot_kernel.h"
VbError_t ec_sync_all(struct vb2_context *ctx, struct VbCommonParams *cparams)
{
VbSharedDataHeader *shared =
(VbSharedDataHeader *)cparams->shared_data_blob;
VbAuxFwUpdateSeverity_t fw_update;
VbError_t rv;
rv = ec_sync_check_aux_fw(ctx, cparams, &fw_update);
if (rv)
return rv;
/* Do EC sync phase 1; this determines if we need an update */
VbError_t phase1_rv = ec_sync_phase1(ctx, cparams);
int need_wait_screen = ec_will_update_slowly(ctx, cparams) ||
(fw_update == VB_AUX_FW_SLOW_UPDATE);
/*
* Check if we need to reboot to load the VGA Option ROM before we can
* display the WAIT screen.
*
* Do this before we check if ec_sync_phase1() requires a reboot for
* some other reason, since there's no reason to reboot twice.
*/
int reboot_for_oprom = (need_wait_screen &&
shared->flags & VBSD_OPROM_MATTERS &&
!(shared->flags & VBSD_OPROM_LOADED));
if (reboot_for_oprom) {
VB2_DEBUG("%s: Reboot to load VGA Option ROM\n", __func__);
vb2_nv_set(ctx, VB2_NV_OPROM_NEEDED, 1);
}
/* Reboot if phase 1 needed it, or if we need to load VGA Option ROM */
if (phase1_rv)
return VBERROR_EC_REBOOT_TO_RO_REQUIRED;
if (reboot_for_oprom)
return VBERROR_VGA_OPROM_MISMATCH;
/* Display the wait screen if we need it */
if (need_wait_screen) {
VB2_DEBUG("%s: EC is slow. Show WAIT screen.\n", __func__);
VbDisplayScreen(ctx, cparams, VB_SCREEN_WAIT, 0);
}
/*
* Do EC sync phase 2; this applies the update and/or jumps to the
* correct EC image.
*/
rv = ec_sync_phase2(ctx, cparams);
if (rv)
return rv;
/*
* Do software sync for devices tunneled throught the EC.
*/
if (fw_update != VB_AUX_FW_NO_UPDATE) {
rv = VbExUpdateAuxFw();
if (rv)
return rv;
}
/*
* Reboot to unload VGA Option ROM if:
* - we displayed the wait screen
* - the system has slow EC update flag set
* - the VGA Option ROM was needed and loaded
* - the system is NOT in developer mode (that'll also need the ROM)
*/
if (need_wait_screen &&
(shared->flags & VBSD_OPROM_MATTERS) &&
(shared->flags & VBSD_OPROM_LOADED) &&
!(shared->flags & VBSD_BOOT_DEV_SWITCH_ON)) {
VB2_DEBUG("%s: Reboot to unload VGA Option ROM\n", __func__);
vb2_nv_set(ctx, VB2_NV_OPROM_NEEDED, 0);
return VBERROR_VGA_OPROM_MISMATCH;
}
/* Do EC sync phase 3; this completes sync and handles battery cutoff */
rv = ec_sync_phase3(ctx, cparams);
if (rv)
return rv;
return VBERROR_SUCCESS;
}
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