common/bootretry.c

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