LXR uboot/arch/arm/include/asm/arch-mx5/iomux.h

   1/*
   2 * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
   3 *
   4 * See file CREDITS for list of people who contributed to this
   5 * project.
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License as
   9 * published by the Free Software Foundation; either version 2 of
  10 * the License, or (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20 * MA 02111-1307 USA
  21 */
  22
  23#ifndef __MACH_MX5_IOMUX_H__
  24#define __MACH_MX5_IOMUX_H__
  25
  26#include <common.h>
  27#include <asm/io.h>
  28#include <asm/arch/imx-regs.h>
  29#include <asm/arch/mx5x_pins.h>
  30
  31typedef unsigned int iomux_pin_name_t;
  32
  33/* various IOMUX output functions */
  34typedef enum iomux_config {
  35        IOMUX_CONFIG_ALT0,      /*!< used as alternate function 0 */
  36        IOMUX_CONFIG_ALT1,      /*!< used as alternate function 1 */
  37        IOMUX_CONFIG_ALT2,      /*!< used as alternate function 2 */
  38        IOMUX_CONFIG_ALT3,      /*!< used as alternate function 3 */
  39        IOMUX_CONFIG_ALT4,      /*!< used as alternate function 4 */
  40        IOMUX_CONFIG_ALT5,      /*!< used as alternate function 5 */
  41        IOMUX_CONFIG_ALT6,      /*!< used as alternate function 6 */
  42        IOMUX_CONFIG_ALT7,      /*!< used as alternate function 7 */
  43        IOMUX_CONFIG_GPIO,      /*!< added to help user use GPIO mode */
  44        IOMUX_CONFIG_SION = 0x1 << 4,   /*!< used as LOOPBACK:MUX SION bit */
  45} iomux_pin_cfg_t;
  46
  47/* various IOMUX pad functions */
  48typedef enum iomux_pad_config {
  49        PAD_CTL_SRE_SLOW = 0x0 << 0,    /* Slow slew rate */
  50        PAD_CTL_SRE_FAST = 0x1 << 0,    /* Fast slew rate */
  51        PAD_CTL_DRV_LOW = 0x0 << 1,     /* Low drive strength */
  52        PAD_CTL_DRV_MEDIUM = 0x1 << 1,  /* Medium drive strength */
  53        PAD_CTL_DRV_HIGH = 0x2 << 1,    /* High drive strength */
  54        PAD_CTL_DRV_MAX = 0x3 << 1,     /* Max drive strength */
  55        PAD_CTL_ODE_OPENDRAIN_NONE = 0x0 << 3,  /* Opendrain disable */
  56        PAD_CTL_ODE_OPENDRAIN_ENABLE = 0x1 << 3,/* Opendrain enable */
  57        PAD_CTL_100K_PD = 0x0 << 4,     /* 100Kohm pulldown */
  58        PAD_CTL_47K_PU = 0x1 << 4,      /* 47Kohm pullup */
  59        PAD_CTL_100K_PU = 0x2 << 4,     /* 100Kohm pullup */
  60        PAD_CTL_22K_PU = 0x3 << 4,      /* 22Kohm pullup */
  61        PAD_CTL_PUE_KEEPER = 0x0 << 6,  /* enable pulldown */
  62        PAD_CTL_PUE_PULL = 0x1 << 6,    /* enable pullup */
  63        PAD_CTL_PKE_NONE = 0x0 << 7,    /* Disable pullup/pulldown */
  64        PAD_CTL_PKE_ENABLE = 0x1 << 7,  /* Enable pullup/pulldown */
  65        PAD_CTL_HYS_NONE = 0x0 << 8,    /* Hysteresis disabled */
  66        PAD_CTL_HYS_ENABLE = 0x1 << 8,  /* Hysteresis enabled */
  67        PAD_CTL_DDR_INPUT_CMOS = 0x0 << 9,/* DDR input CMOS */
  68        PAD_CTL_DDR_INPUT_DDR = 0x1 << 9,/* DDR input DDR */
  69        PAD_CTL_DRV_VOT_LOW = 0x1 << 13, /* Low voltage mode */
  70        PAD_CTL_DRV_VOT_HIGH = 0x0 << 13,/* High voltage mode */
  71} iomux_pad_config_t;
  72
  73/* various IOMUX input functions */
  74typedef enum iomux_input_config {
  75        INPUT_CTL_PATH0 = 0x0,
  76        INPUT_CTL_PATH1,
  77        INPUT_CTL_PATH2,
  78        INPUT_CTL_PATH3,
  79        INPUT_CTL_PATH4,
  80        INPUT_CTL_PATH5,
  81        INPUT_CTL_PATH6,
  82        INPUT_CTL_PATH7,
  83} iomux_input_config_t;
  84
  85void mxc_request_iomux(iomux_pin_name_t pin, iomux_pin_cfg_t config);
  86void mxc_free_iomux(iomux_pin_name_t pin, iomux_pin_cfg_t config);
  87void mxc_iomux_set_pad(iomux_pin_name_t pin, u32 config);
  88unsigned int mxc_iomux_get_pad(iomux_pin_name_t pin);
  89void mxc_iomux_set_input(iomux_input_select_t input, u32 config);
  90
  91#endif                          /*  __MACH_MX5_IOMUX_H__ */
  92