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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.
*
* Delay/beep functions used in dev-mode kernel selection.
*/
#include "2sysincludes.h"
#include "2common.h"
#include "2misc.h"
#include "sysincludes.h"
#include "utility.h"
#include "vboot_api.h"
#include "vboot_audio.h"
#include "vboot_common.h"
int audio_open_count = 0; /* Times audio has been opened */
static int audio_use_short; /* Use short delay? */
static uint64_t open_time; /* Time of last open */
static int beep_count; /* Number of beeps so far */
/**
* Initialization function.
*/
void vb2_audio_start(struct vb2_context *ctx)
{
struct vb2_gbb_header *gbb = vb2_get_gbb(ctx);
open_time = VbExGetTimer(); /* "zero" starts now */
beep_count = 0;
/*
* Use a short developer screen delay on the first audio if indicated
* by GBB flags.
*/
if ((gbb->flags & VB2_GBB_FLAG_DEV_SCREEN_SHORT_DELAY) &&
(audio_open_count++ == 0)) {
VB2_DEBUG("vb2_audio_start() - using short dev screen delay\n");
audio_use_short = 1;
} else {
audio_use_short = 0;
}
}
/**
* Caller should loop without extra delay until this returns false.
*/
int vb2_audio_looping(void)
{
uint64_t now = VbExGetTimer() - open_time;
/* If we're using short delay, wait 2 seconds and don't beep */
if (audio_use_short)
return (now < 2 * VB_USEC_PER_SEC);
/* Otherwise, beep at 20 and 20.5 seconds */
if ((beep_count == 0 && now > 20000 * VB_MSEC_PER_SEC) ||
(beep_count == 1 && now > 20500 * VB_MSEC_PER_SEC)) {
VbExBeep(250, 400);
beep_count++;
}
/* Stop after 30 seconds */
return (now < 30 * VB_USEC_PER_SEC);
}
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