LXR uboot/common/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 <errno.h>
  11#include <watchdog.h>
  12
  13#ifndef CONFIG_BOOT_RETRY_MIN
  14#define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  15#endif
  16
  17static uint64_t endtime;  /* must be set, default is instant timeout */
  18static int      retry_time = -1; /* -1 so can call readline before main_loop */
  19
  20/***************************************************************************
  21 * initialize command line timeout
  22 */
  23void bootretry_init_cmd_timeout(void)
  24{
  25        char *s = env_get("bootretry");
  26
  27        if (s != NULL)
  28                retry_time = (int)simple_strtol(s, NULL, 10);
  29        else
  30                retry_time = CONFIG_BOOT_RETRY_TIME;
  31
  32        if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
  33                retry_time = CONFIG_BOOT_RETRY_MIN;
  34}
  35
  36/***************************************************************************
  37 * reset command line timeout to retry_time seconds
  38 */
  39void bootretry_reset_cmd_timeout(void)
  40{
  41        endtime = endtick(retry_time);
  42}
  43
  44int bootretry_tstc_timeout(void)
  45{
  46        while (!tstc()) {       /* while no incoming data */
  47                if (retry_time >= 0 && get_ticks() > endtime)
  48                        return -ETIMEDOUT;
  49                WATCHDOG_RESET();
  50        }
  51
  52        return 0;
  53}
  54
  55void bootretry_dont_retry(void)
  56{
  57        retry_time = -1;
  58}
  59