LXR uboot/boot/bootretry.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2000
   4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5 */
   6
   7#include <common.h>
   8#include <bootretry.h>
   9#include <cli.h>
  10#include <env.h>
  11#include <errno.h>
  12#include <time.h>
  13#include <watchdog.h>
  14
  15#ifndef CONFIG_BOOT_RETRY_MIN
  16#define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  17#endif
  18
  19static uint64_t endtime;  /* must be set, default is instant timeout */
  20static int      retry_time = -1; /* -1 so can call readline before main_loop */
  21
  22/***************************************************************************
  23 * initialize command line timeout
  24 */
  25void bootretry_init_cmd_timeout(void)
  26{
  27        char *s = env_get("bootretry");
  28
  29        if (s != NULL)
  30                retry_time = (int)simple_strtol(s, NULL, 10);
  31        else
  32                retry_time = CONFIG_BOOT_RETRY_TIME;
  33
  34        if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
  35                retry_time = CONFIG_BOOT_RETRY_MIN;
  36}
  37
  38/***************************************************************************
  39 * reset command line timeout to retry_time seconds
  40 */
  41void bootretry_reset_cmd_timeout(void)
  42{
  43        endtime = endtick(retry_time);
  44}
  45
  46int bootretry_tstc_timeout(void)
  47{
  48        while (!tstc()) {       /* while no incoming data */
  49                if (retry_time >= 0 && get_ticks() > endtime)
  50                        return -ETIMEDOUT;
  51                WATCHDOG_RESET();
  52        }
  53
  54        return 0;
  55}
  56
  57void bootretry_dont_retry(void)
  58{
  59        retry_time = -1;
  60}
  61