// SPDX-License-Identifier: GPL-2.0+
  /*
   * The 'conitrace' command prints the codes received from the console input as
   * hexadecimal numbers.
   *
   * Copyright (c) 2018, Heinrich Schuchardt <xypron.glpk@gmx.de>
   */
  #include <common.h>
  #include <command.h>
  
  static int do_conitrace(cmd_tbl_t *cmdtp, int flag, int argc,
  			char * const argv[])
  {
  	bool first = true;
  
  	printf("Waiting for your input
  ");
  	printf("To terminate type 'x'
  ");
  
  	/* Empty input buffer */
  	while (tstc())
  		getc();
  
  	for (;;) {
  		int c = getc();
  
  		if (first && (c == 'x' || c == 'X'))
  			break;
  
  		printf("%02x ", c);
  		first = false;
  
  		/* 1 ms delay - serves to detect separate keystrokes */
  		udelay(1000);
  		if (!tstc()) {
  			printf("
  ");
  			first = true;
  		}
  	}
  
  	return CMD_RET_SUCCESS;
  }
  
  #ifdef CONFIG_SYS_LONGHELP
  static char conitrace_help_text[] = "";
  #endif
  
  U_BOOT_CMD_COMPLETE(
  	conitrace, 2, 0, do_conitrace,
  	"trace console input",
  	conitrace_help_text, NULL
  );