cmd/cls.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2018
   4  * DENX Software Engineering, Anatolij Gustschin <agust@denx.de>
   5  *
   6  * cls - clear screen command
   7  */
   8 #include <common.h>
   9 #include <command.h>
  10 #include <dm.h>
  11 #include <video_console.h>
  12
  13 #define CSI "\x1b["
  14
  15 static int do_video_clear(struct cmd_tbl *cmdtp, int flag, int argc,
  16                           char *const argv[])
  17 {
  18         __maybe_unused struct udevice *dev;
  19
  20         /*
  21          * Send clear screen and home
  22          *
  23          * FIXME(Heinrich Schuchardt <xypron.glpk@gmx.de>): This should go
  24          * through an API and only be written to serial terminals, not video
  25          * displays
  26          */
  27         printf(CSI "2J" CSI "1;1H");
  28         if (IS_ENABLED(CONFIG_VIDEO_ANSI))
  29                 return 0;
  30
  31         if (IS_ENABLED(CONFIG_VIDEO)) {
  32                 if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev))
  33                         return CMD_RET_FAILURE;
  34                 if (vidconsole_clear_and_reset(dev))
  35                         return CMD_RET_FAILURE;
  36         }
  37
  38         return CMD_RET_SUCCESS;
  39 }
  40
  41 U_BOOT_CMD(cls, 1, 1, do_video_clear, "clear screen", "");