src/soc/nvidia/tegra/apbmisc.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright 2014 Google Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc.
  18  */
  19
  20 #include <arch/io.h>
  21 #include <soc/addressmap.h>
  22
  23 #include "apbmisc.h"
  24
  25 static struct apbmisc *misc = (struct apbmisc *)TEGRA_APB_MISC_BASE;
  26
  27 void enable_jtag(void)
  28 {
  29         write32(&misc->pp_config_ctl, PP_CONFIG_CTL_JTAG);
  30 }
  31
  32 void clamp_tristate_inputs(void)
  33 {
  34         write32(&misc->pp_pinmux_global, PP_PINMUX_CLAMP_INPUTS);
  35 }
  36
  37 void tegra_revision_info(struct tegra_revision *id)
  38 {
  39         uintptr_t gp_hidrev= (uintptr_t)TEGRA_APB_MISC_BASE + MISC_GP_HIDREV;
  40         uint32_t reg;
  41
  42         reg = read32((void *)(gp_hidrev));
  43
  44         id->hid_fam = (reg >> 0) & 0x0f;
  45         id->chip_id = (reg >> 8) & 0xff;
  46         id->major = (reg >> 4) & 0x0f;
  47         id->minor = (reg >> 16) & 0x07;
  48 }