arch/arm/mach-tegra/tegra114/funcmux.c

   1 /*
   2  * Copyright (c) 2010-2013, NVIDIA CORPORATION.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 /* Tegra114 high-level function multiplexing */
  18
  19 #include <common.h>
  20 #include <asm/arch/clock.h>
  21 #include <asm/arch/funcmux.h>
  22 #include <asm/arch/pinmux.h>
  23
  24 int funcmux_select(enum periph_id id, int config)
  25 {
  26         int bad_config = config != FUNCMUX_DEFAULT;
  27
  28         switch (id) {
  29         case PERIPH_ID_UART4:
  30                 switch (config) {
  31                 case FUNCMUX_UART4_GMI:
  32                         pinmux_set_func(PMUX_PINGRP_GMI_A16_PJ7,
  33                                         PMUX_FUNC_UARTD);
  34                         pinmux_set_func(PMUX_PINGRP_GMI_A17_PB0,
  35                                         PMUX_FUNC_UARTD);
  36                         pinmux_set_func(PMUX_PINGRP_GMI_A18_PB1,
  37                                         PMUX_FUNC_UARTD);
  38                         pinmux_set_func(PMUX_PINGRP_GMI_A19_PK7,
  39                                         PMUX_FUNC_UARTD);
  40
  41                         pinmux_set_io(PMUX_PINGRP_GMI_A16_PJ7, PMUX_PIN_OUTPUT);
  42                         pinmux_set_io(PMUX_PINGRP_GMI_A17_PB0, PMUX_PIN_INPUT);
  43                         pinmux_set_io(PMUX_PINGRP_GMI_A18_PB1, PMUX_PIN_INPUT);
  44                         pinmux_set_io(PMUX_PINGRP_GMI_A19_PK7, PMUX_PIN_OUTPUT);
  45
  46                         pinmux_tristate_disable(PMUX_PINGRP_GMI_A16_PJ7);
  47                         pinmux_tristate_disable(PMUX_PINGRP_GMI_A17_PB0);
  48                         pinmux_tristate_disable(PMUX_PINGRP_GMI_A18_PB1);
  49                         pinmux_tristate_disable(PMUX_PINGRP_GMI_A19_PK7);
  50                         break;
  51                 }
  52                 break;
  53
  54         /* Add other periph IDs here as needed */
  55
  56         default:
  57                 debug("%s: invalid periph_id %d", __func__, id);
  58                 return -1;
  59         }
  60
  61         if (bad_config) {
  62                 debug("%s: invalid config %d for periph_id %d", __func__,
  63                       config, id);
  64                 return -1;
  65         }
  66         return 0;
  67 }