arch/arm/mach-tegra/tegra30/funcmux.c

   1 /*
   2  * Copyright (c) 2010-2012, 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 /* Tegra30 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_UART1:
  30                 switch (config) {
  31                 case FUNCMUX_UART1_ULPI:
  32                         pinmux_set_func(PMUX_PINGRP_ULPI_DATA0_PO1,
  33                                         PMUX_FUNC_UARTA);
  34                         pinmux_set_func(PMUX_PINGRP_ULPI_DATA1_PO2,
  35                                         PMUX_FUNC_UARTA);
  36                         pinmux_set_func(PMUX_PINGRP_ULPI_DATA2_PO3,
  37                                         PMUX_FUNC_UARTA);
  38                         pinmux_set_func(PMUX_PINGRP_ULPI_DATA3_PO4,
  39                                         PMUX_FUNC_UARTA);
  40                         pinmux_tristate_disable(PMUX_PINGRP_ULPI_DATA0_PO1);
  41                         pinmux_tristate_disable(PMUX_PINGRP_ULPI_DATA1_PO2);
  42                         pinmux_tristate_disable(PMUX_PINGRP_ULPI_DATA2_PO3);
  43                         pinmux_tristate_disable(PMUX_PINGRP_ULPI_DATA3_PO4);
  44                         break;
  45                 }
  46                 break;
  47
  48         /* Add other periph IDs here as needed */
  49
  50         default:
  51                 debug("%s: invalid periph_id %d", __func__, id);
  52                 return -1;
  53         }
  54
  55         if (bad_config) {
  56                 debug("%s: invalid config %d for periph_id %d", __func__,
  57                       config, id);
  58                 return -1;
  59         }
  60         return 0;
  61 }