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/* Copyright 2017 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.
*/
/* Recovery button override module. */
#include "common.h"
#include "console.h"
#include "extension.h"
#include "registers.h"
#include "util.h"
/*
* The recovery button, on some systems only, is wired to KEY0 in rbox. For
* testing, we need to be able override the value. We'll have a vendor command
* such that the AP can query the state of the recovery button. However, the
* reported state can only be overridden with a console command given sufficient
* privileges.
*/
static uint8_t rec_btn_force_pressed;
static uint8_t is_rec_btn_pressed(void)
{
if (rec_btn_force_pressed)
return 1;
/*
* If not force pressed, check the actual state of button. Note,
* the value is inverted because the button is active low.
*/
return !GREAD_FIELD(RBOX, CHECK_INPUT, KEY0_IN);
}
static int command_recbtnforce(int argc, char **argv)
{
int val;
if (argc > 2)
return EC_ERROR_PARAM_COUNT;
if (argc == 2) {
/* Make sure we're allowed to override the recovery button. */
if (console_is_restricted())
return EC_ERROR_ACCESS_DENIED;
if (!parse_bool(argv[1], &val))
return EC_ERROR_PARAM1;
rec_btn_force_pressed = val;
}
ccprintf("RecBtn: %s pressed\n",
rec_btn_force_pressed ? "forced" :
is_rec_btn_pressed() ? "" : "not");
return EC_SUCCESS;
}
DECLARE_SAFE_CONSOLE_COMMAND(recbtnforce, command_recbtnforce,
"[enable | disable]",
"Force enable the reported recbtn state.");
static enum vendor_cmd_rc vc_get_rec_btn(enum vendor_cmd_cc code,
void *buf,
size_t input_size,
size_t *response_size)
{
*(uint8_t *)buf = is_rec_btn_pressed();
*response_size = 1;
return VENDOR_RC_SUCCESS;
}
DECLARE_VENDOR_COMMAND(VENDOR_CC_GET_REC_BTN, vc_get_rec_btn);
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