arch/arm/mach-tegra/cmd_enterrcm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2012-2019, NVIDIA CORPORATION. All rights reserved.
   4  *
   5  * Derived from code (arch/arm/lib/reset.c) that is:
   6  *
   7  * (C) Copyright 2002
   8  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   9  * Marius Groeger <mgroeger@sysgo.de>
  10  *
  11  * (C) Copyright 2002
  12  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  13  * Alex Zuepke <azu@sysgo.de>
  14  *
  15  * (C) Copyright 2002
  16  * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
  17  *
  18  * (C) Copyright 2004
  19  * DAVE Srl
  20  * http://www.dave-tech.it
  21  * http://www.wawnet.biz
  22  * mailto:info@wawnet.biz
  23  *
  24  * (C) Copyright 2004 Texas Insturments
  25  */
  26
  27 #include <common.h>
  28 #include <command.h>
  29 #include <cpu_func.h>
  30 #include <irq_func.h>
  31 #include <asm/arch/tegra.h>
  32 #include <asm/arch-tegra/pmc.h>
  33
  34 static int do_enterrcm(struct cmd_tbl *cmdtp, int flag, int argc,
  35                        char *const argv[])
  36 {
  37         puts("Entering RCM...\n");
  38         udelay(50000);
  39
  40         tegra_pmc_writel(2, PMC_SCRATCH0);
  41         disable_interrupts();
  42         reset_cpu(0);
  43
  44         return 0;
  45 }
  46
  47 U_BOOT_CMD(
  48         enterrcm, 1, 0, do_enterrcm,
  49         "reset Tegra and enter USB Recovery Mode",
  50         ""
  51 );