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nuttx/arch/arm/src/a1x/a1x_pio.h

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/************************************************************************************
* arch/arm/src/a1x/a1x_pio.h
*
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_A1X_A1X_PIO_H
#define __ARCH_ARM_SRC_A1X_A1X_PIO_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include "chip/a1x_pio.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Bit-encoded input to a1x_pio_config() ********************************************/
/* 32-bit Encoding:
*
* 3322 2222 2222 1111 1111 11
* 1098 7654 3210 9876 5432 1098 7654 3210
* ---- ---- ---- ---- ---- ---- ---- ----
* .... .... MMMM PPDD IIIV ...P PPPB BBBB
*/
/* Input/Output mode:
*
* 3322 2222 2222 1111 1111 11
* 1098 7654 3210 9876 5432 1098 7654 3210
* ---- ---- ---- ---- ---- ---- ---- ----
* .... .... MMMX .... .... .... .... ....
*/
#define PIO_MODE_SHIFT (21) /* Bits 21-23: PIO mode */
#define PIO_MODE_MASK (7 << PIO_MODE_SHIFT)
# define PIO_PERIPH0 (PIO_REG_CFG_INPUT << PIO_MODE_SHIFT)
# define PIO_PERIPH1 (PIO_REG_CFG_OUTPUT << PIO_MODE_SHIFT)
# define PIO_PERIPH2 (2 << PIO_MODE_SHIFT)
# define PIO_PERIPH3 (3 << PIO_MODE_SHIFT)
# define PIO_PERIPH4 (4 << PIO_MODE_SHIFT)
# define PIO_PERIPH5 (5 << PIO_MODE_SHIFT)
# define PIO_PERIPH6 (6 << PIO_MODE_SHIFT)
# define PIO_PERIPH7 (7 << PIO_MODE_SHIFT)
# define PIO_INPUT PIO_PERIPH0 /* Input */
# define PIO_OUTPUT PIO_PERIPH1 /* Output */
/* Bit 20 also specifies an external interrupt which must go with ID=6 */
#define PIO_EINT_BIT (1 << 20) /* Bit 20: External PIO interrupt */
#define PIO_EINT_SHIFT (20) /* Bits 20-23: Extended PIO mode */
#define PIO_EINT_MASK (15 << PIO_EINT_SHIFT)
# define PIO_EINT (PIO_EINT_BIT | PIO_PERIPH6)
/* These bits set the pull-up/down configuration of the pin:
*
* 3322 2222 2222 1111 1111 11
* 1098 7654 3210 9876 5432 1098 7654 3210
* ---- ---- ---- ---- ---- ---- ---- ----
* .... .... .... PP.. .... .... .... ....
*/
#define PIO_PULL_SHIFT (18) /* Bits 18-19: PIO configuration bits */
#define PIO_PULL_MASK (3 << PIO_PULL_SHIFT)
# define PIO_PULL_NONE (PIO_REG_PULL_NONE << PIO_PULL_SHIFT)
# define PIO_PULL_PULLUP (PIO_REG_PULL_UP << PIO_PULL_SHIFT)
# define PIO_PULL_PULLDOWN (PIO_REG_PULL_DOWN << PIO_PULL_SHIFT)
/* Drive (outputs only):
*
* 3322 2222 2222 1111 1111 11
* 1098 7654 3210 9876 5432 1098 7654 3210
* ---- ---- ---- ---- ---- ---- ---- ----
* .... .... .... ..DD .... .... .... ....
*/
#define PIO_DRIVE_SHIFT (16) /* Bits 16-17: Drive strength */
#define PIO_DRIVE_MASK (3 << PIO_DRIVE_SHIFT)
# define PIO_DRIVE_NONE (0 << PIO_DRIVE_SHIFT)
# define PIO_DRIVE_LOW (PIO_REG_DRV_LEVEL0 << PIO_DRIVE_SHIFT)
# define PIO_DRIVE_MEDLOW (PIO_REG_DRV_LEVEL1 << PIO_DRIVE_SHIFT)
# define PIO_DRIVE_MEDHIGH (PIO_REG_DRV_LEVEL2 << PIO_DRIVE_SHIFT)
# define PIO_DRIVE_HIGH (PIO_REG_DRV_LEVEL3 << PIO_DRIVE_SHIFT)
/* Interrupt modes (inputs only):
*
* 3322 2222 2222 1111 1111 11
* 1098 7654 3210 9876 5432 1098 7654 3210
* ---- ---- ---- ---- ---- ---- ---- ----
* .... .... ... .... III. .... .... ....
*/
#define PIO_INT_SHIFT (13) /* Bits 13-15: PIO interrupt bits */
#define PIO_INT_MASK (7 << PIO_INT_SHIFT)
# define PIO_INT_NONE (0 << PIO_INT_SHIFT)
# define PIO_INT_RISING (PIO_REG_INT_POSEDGE << PIO_INT_SHIFT)
# define PIO_INT_FALLING (PIO_REG_INT_NEGEDGE << PIO_INT_SHIFT)
# define PIO_INT_HIGHLEVEL (PIO_REG_INT_HILEVEL << PIO_INT_SHIFT)
# define PIO_INT_LOWLEVEL (PIO_REG_INT_LOWLEVEL << PIO_INT_SHIFT)
# define PIO_INT_BOTHEDGES (PIO_REG_INT_BOTHEDGES << PIO_INT_SHIFT)
/* If the pin is an PIO output, then this identifies the initial output value:
*
* 3322 2222 2222 1111 1111 11
* 1098 7654 3210 9876 5432 1098 7654 3210
* ---- ---- ---- ---- ---- ---- ---- ----
* .... .... .... .... ...V .... .... ....
* V
*/
#define PIO_OUTPUT_SET (1 << 12) /* Bit 12: Initial value of output */
#define PIO_OUTPUT_CLEAR (0)
/* This identifies the PIO port:
*
* 3322 2222 2222 1111 1111 11
* 1098 7654 3210 9876 5432 1098 7654 3210
* ---- ---- ---- ---- ---- ---- ---- ----
* .... .... .... .... .... ...P PPP. ....
* PPPP
*/
#define PIO_PORT_SHIFT (5) /* Bit 5-8: Port number */
#define PIO_PORT_MASK (15 << PIO_PORT_SHIFT)
# define PIO_PORT_PIOA (PIO_REG_PORTA << PIO_PORT_SHIFT)
# define PIO_PORT_PIOB (PIO_REG_PORTB << PIO_PORT_SHIFT)
# define PIO_PORT_PIOC (PIO_REG_PORTC << PIO_PORT_SHIFT)
# define PIO_PORT_PIOD (PIO_REG_PORTD << PIO_PORT_SHIFT)
# define PIO_PORT_PIOE (PIO_REG_PORTE << PIO_PORT_SHIFT)
# define PIO_PORT_PIOF (PIO_REG_PORTF << PIO_PORT_SHIFT)
# define PIO_PORT_PIOG (PIO_REG_PORTG << PIO_PORT_SHIFT)
# define PIO_PORT_PIOH (PIO_REG_PORTH << PIO_PORT_SHIFT)
# define PIO_PORT_PIOI (PIO_REG_PORTI << PIO_PORT_SHIFT)
/* This identifies the bit in the port:
*
* 3322 2222 2222 1111 1111 11
* 1098 7654 3210 9876 5432 1098 7654 3210
* ---- ---- ---- ---- ---- ---- ---- ----
* .... .... .... .... .... .... ...B BBBB
*/
#define PIO_PIN_SHIFT (0) /* Bits 0-4: PIO number: 0-31 */
#define PIO_PIN_MASK (31 << PIO_PIN_SHIFT)
#define PIO_PIN0 (0 << PIO_PIN_SHIFT)
#define PIO_PIN1 (1 << PIO_PIN_SHIFT)
#define PIO_PIN2 (2 << PIO_PIN_SHIFT)
#define PIO_PIN3 (3 << PIO_PIN_SHIFT)
#define PIO_PIN4 (4 << PIO_PIN_SHIFT)
#define PIO_PIN5 (5 << PIO_PIN_SHIFT)
#define PIO_PIN6 (6 << PIO_PIN_SHIFT)
#define PIO_PIN7 (7 << PIO_PIN_SHIFT)
#define PIO_PIN8 (8 << PIO_PIN_SHIFT)
#define PIO_PIN9 (9 << PIO_PIN_SHIFT)
#define PIO_PIN10 (10 << PIO_PIN_SHIFT)
#define PIO_PIN11 (11 << PIO_PIN_SHIFT)
#define PIO_PIN12 (12 << PIO_PIN_SHIFT)
#define PIO_PIN13 (13 << PIO_PIN_SHIFT)
#define PIO_PIN14 (14 << PIO_PIN_SHIFT)
#define PIO_PIN15 (15 << PIO_PIN_SHIFT)
#define PIO_PIN16 (16 << PIO_PIN_SHIFT)
#define PIO_PIN17 (17 << PIO_PIN_SHIFT)
#define PIO_PIN18 (18 << PIO_PIN_SHIFT)
#define PIO_PIN19 (19 << PIO_PIN_SHIFT)
#define PIO_PIN20 (20 << PIO_PIN_SHIFT)
#define PIO_PIN21 (21 << PIO_PIN_SHIFT)
#define PIO_PIN22 (22 << PIO_PIN_SHIFT)
#define PIO_PIN23 (23 << PIO_PIN_SHIFT)
#define PIO_PIN24 (24 << PIO_PIN_SHIFT)
#define PIO_PIN25 (25 << PIO_PIN_SHIFT)
#define PIO_PIN26 (26 << PIO_PIN_SHIFT)
#define PIO_PIN27 (27 << PIO_PIN_SHIFT)
#define PIO_PIN28 (28 << PIO_PIN_SHIFT)
#define PIO_PIN29 (29 << PIO_PIN_SHIFT)
#define PIO_PIN30 (30 << PIO_PIN_SHIFT)
#define PIO_PIN31 (31 << PIO_PIN_SHIFT)
/************************************************************************************
* Public Types
************************************************************************************/
/* Must be big enough to hold the 32-bit encoding */
typedef uint32_t pio_pinset_t;
/************************************************************************************
* Inline Functions
************************************************************************************/
#ifndef __ASSEMBLY__
/************************************************************************************
* Public Data
************************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/************************************************************************************
* Public Function Prototypes
************************************************************************************/
/************************************************************************************
* Name: a1x_pio_irqinitialize
*
* Description:
* Initialize logic to support a second level of interrupt decoding for PIO pins.
*
************************************************************************************/
#ifdef CONFIG_A1X_PIO_IRQ
void a1x_pio_irqinitialize(void);
#else
# define a1x_pio_irqinitialize()
#endif
/************************************************************************************
* Name: a1x_pio_config
*
* Description:
* Configure a PIO pin based on bit-encoded description of the pin.
*
************************************************************************************/
int a1x_pio_config(pio_pinset_t cfgset);
/************************************************************************************
* Name: a1x_pio_write
*
* Description:
* Write one or zero to the selected PIO pin
*
************************************************************************************/
void a1x_pio_write(pio_pinset_t pinset, bool value);
/************************************************************************************
* Name: a1x_pio_read
*
* Description:
* Read one or zero from the selected PIO pin
*
************************************************************************************/
bool a1x_pio_read(pio_pinset_t pinset);
/************************************************************************************
* Name: a1x_pio_irqenable
*
* Description:
* Enable the interrupt for specified PIO IRQ
*
************************************************************************************/
#ifdef CONFIG_A1X_PIO_IRQ
void a1x_pio_irqenable(int irq);
#else
# define a1x_pio_irqenable(irq)
#endif
/************************************************************************************
* Name: a1x_pio_irqdisable
*
* Description:
* Disable the interrupt for specified PIO IRQ
*
************************************************************************************/
#ifdef CONFIG_A1X_PIO_IRQ
void a1x_pio_irqdisable(int irq);
#else
# define a1x_pio_irqdisable(irq)
#endif
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_A1X_A1X_PIO_H */
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