| /* 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; |
| |
| /* 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("Reboot to load VGA Option ROM\n"); |
| 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("EC is slow. Show WAIT screen.\n"); |
| VbDisplayScreen(ctx, cparams, VB_SCREEN_WAIT, 0); |
| } |
| |
| /* Phase 2; Applies 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 through the EC. |
| */ |
| 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("Reboot to unload VGA Option ROM\n"); |
| vb2_nv_set(ctx, VB2_NV_OPROM_NEEDED, 0); |
| return VBERROR_VGA_OPROM_MISMATCH; |
| } |
| |
| /* Phase 3; Completes sync and handles battery cutoff */ |
| rv = ec_sync_phase3(ctx, cparams); |
| if (rv) |
| return rv; |
| |
| return VBERROR_SUCCESS; |
| } |