171 lines
7.2 KiB
C
171 lines
7.2 KiB
C
/****************************************************************************
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* arch/arm/src/imxrt/imxrt_iomuxc.h
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_IMXRT_IMX_IOMUXC_H
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#define __ARCH_ARM_SRC_IMXRT_IMX_IOMUXC_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include "chip/imxrt_iomuxc.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* 16-bit Encoding:
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*
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* .... RRRR ODDD LSST
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*/
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/* Output Pull Up/Down:
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*
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* .... RRRR .... ....
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*/
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#define _IOMUX_PULLTYPE_SHIFT (8) /* Bits 8-9: Pull up/down type */
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#define _IOMUX_PULLTYPE_MASK (3 << _IOMUX_PULLTYPE_SHIFT)
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# define _IOMUX_PULL_NONE (0 << _IOMUX_PULLTYPE_SHIFT) /* Pull/keeper disabled */
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# define _IOMUX_PULL_KEEP (1 << _IOMUX_PULLTYPE_SHIFT) /* Output determined by keeper */
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# define _IOMUX_PULL_ENABLE (2 << _IOMUX_PULLTYPE_SHIFT) /* Output pulled up or down */
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#define _IOMUX_PULLDESC_SHIFT (10) /* Bits 10-11: Pull up/down description */
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#define _IOMUX_PULLDESC_MASK (3 << _IOMUX_PULLDESC_SHIFT)
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# define _IOMUX_PULL_UP_22K (PULL_UP_22K << _IOMUX_PULLDESC_SHIFT) /* Pull up with 22 KOhm resister */
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# define _IOMUX_PULL_UP_47K (PULL_UP_47K << _IOMUX_PULLDESC_SHIFT) /* Pull up with 47 KOhm resister */
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# define _IOMUX_PULL_UP_100K (PULL_UP_100K << _IOMUX_PULLDESC_SHIFT) /* Pull up with 100 KOhm resister */
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# define _IOMUX_PULL_DOWN_100K (PULL_DOWN_100K << _IOMUX_PULLDESC_SHIFT) /* Pull down with 100 KOhm resister */
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#define IOMUX_PULL_SHIFT (8) /* Bits 8-11: Pull up/down selection */
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#define IOMUX_PULL_MASK (15 << IOMUX_PULL_SHIFT)
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# define IOMUX_PULL_NONE _IOMUX_PULL_NONE
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# define IOMUX_PULL_KEEP _IOMUX_PULL_KEEP
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# define IOMUX_PULL_UP_22K (_IOMUX_PULL_ENABLE | _IOMUX_PULL_UP_22K)
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# define IOMUX_PULL_UP_47K (_IOMUX_PULL_ENABLE | _IOMUX_PULL_UP_47K)
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# define IOMUX_PULL_UP_100K (_IOMUX_PULL_ENABLE | _IOMUX_PULL_UP_100K)
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# define IOMUX_PULL_DOWN_100K (_IOMUX_PULL_ENABLE | _IOMUX_PULL_DOWN_100K)
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/* Open Drain Output:
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*
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* .... .... O... ....
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*/
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#define IOMUX_CMOS_OUTPUT (0) /* Bit 7: 0=CMOS output */
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#define IOMUX_OPENDRAIN (1 << 7) /* Bit 7: 1=Enable open-drain output */
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/* Output Drive Strength:
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*
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* .... .... .DDD ....
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*/
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#define IOMUX_DRIVE_SHIFT (4) /* Bits 4-6: Output Drive Strength */
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#define IOMUX_DRIVE_MASK (7 << IOMUX_DRIVE_SHIFT)
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# define IOMUX_DRIVE_HIZ (DRIVE_HIZ << IOMUX_DRIVE_SHIFT) /* HI-Z */
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# define IOMUX_DRIVE_260OHM (DRIVE_260OHM << IOMUX_DRIVE_SHIFT) /* 150 Ohm @3.3V, 260 Ohm @1.8V */
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# define IOMUX_DRIVE_130OHM (DRIVE_130OHM << IOMUX_DRIVE_SHIFT) /* 75 Ohm @3.3V, 130 Ohm @1.8V */
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# define IOMUX_DRIVE_90OHM (DRIVE_90OHM << IOMUX_DRIVE_SHIFT) /* 50 Ohm @3.3V, 90 Ohm @1.8V */
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# define IOMUX_DRIVE_60OHM (DRIVE_60OHM << IOMUX_DRIVE_SHIFT) /* 37 Ohm @3.3V, 60 Ohm @1.8V */
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# define IOMUX_DRIVE_50OHM (DRIVE_50OHM << IOMUX_DRIVE_SHIFT) /* 30 Ohm @3.3V, 50 Ohm @1.8V */
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# define IOMUX_DRIVE_40OHM (DRIVE_40OHM << IOMUX_DRIVE_SHIFT) /* 25 Ohm @3.3V, 40 Ohm @1.8V */
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# define IOMUX_DRIVE_33OHM (DRIVE_33OHM << IOMUX_DRIVE_SHIFT) /* 20 Ohm @3.3V, 33 Ohm @1.8V */
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/* Output Slew Rate:
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*
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* .... .... .... L...
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*/
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#define IOMUX_SLEW_SLOW (0) /* Bit 3: 0=Slow Slew Rate */
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#define IOMUX_SLEW_FAST (1 << 3) /* Bit 3: 1=Fast Slew Rate */
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/* Output Speed:
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*
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* .... .... .... .SS.
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*/
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#define IOMUX_SPEED_SHIFT (1) /* Bits 1-2: Speed */
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#define IOMUX_SPEED_MASK (3 << IOMUX_SPEED_SHIFT)
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# define IOMUX_SPEED_LOW (SPEED_LOW << IOMUX_SPEED_SHIFT) /* Low frequency (50 MHz) */
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# define IOMUX_SPEED_MEDIUM (SPEED_MEDIUM << IOMUX_SPEED_SHIFT) /* Medium frequency (100, 150 MHz) */
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# define IOMUX_SPEED_MAX (SPEED_MAX << IOMUX_SPEED_SHIFT) /* Maximum frequency (100, 150, 200 MHz) */
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/* Input Schmitt Trigger:
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*
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* .... .... .... ...T
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*/
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#define IOMUX_CMOS_INPUT (0) /* Bit 0: 0=CMOS input */
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#define IOMUX_SCHMITT_TRIGGER (1 << 0) /* Bit 0: 1=Enable Schmitt trigger if input */
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* The smallest integer type that can hold the IOMUX encoding */
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typedef uint16_t iomux_pinset_t;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: imxrt_padmux_map
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*
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* Description:
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* This function map a Pad Mux register index to the corresponding Pad
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* Control register index.
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*
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****************************************************************************/
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unsigned int imxrt_padmux_map(unsigned int padmux);
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/****************************************************************************
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* Name: imxrt_iomux_configure
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*
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* Description:
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* This function writes the encoded pad configuration to the Pad Control
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* register.
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*
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****************************************************************************/
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int imxrt_iomux_configure(uintptr_t padctl, iomux_pinset_t ioset);
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#endif /* __ARCH_ARM_SRC_IMXRT_IMX_IOMUXC_H */
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