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nuttx/arch/arm/src/tms570/tms570_gio.h
Gregory Nutt c58393cb4d TMS570: Add GIO drivrs and GIO interrupt support
2015-12-25 13:44:49 -06:00

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/************************************************************************************
* arch/arm/src/tms570/tms570_gio.h
*
* Copyright (C) 2015 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_TMS570_TMS570_GIO_H
#define __ARCH_ARM_SRC_TMS570_TMS570_GIO_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <assert.h>
#include "chip/tms570_gio.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Bit-encoded input to tms570_configgio() ********************************************/
/* 32-bit Encoding:
*
* .... .... .... .... M.CC IIOV PPP. .BBB
*/
/* Input/Output mode:
*
* .... .... .... .... M... .... .... ....
*/
#define GIO_MODE_SHIFT (15) /* Bit 15: GIO mode */
#define GIO_MODE_MASK (1 << GIO_MODE_SHIFT)
# define GIO_INPUT (0 << GIO_MODE_SHIFT) /* GIO Input */
# define GIO_OUTPUT (1 << GIO_MODE_SHIFT) /* GIO Output */
/* These bits set the configuration of the pin:
* NOTE: No definitions for parallel capture mode
*
* .... .... .... .... ..CC .... .... ....
*/
#define GIO_CFG_SHIFT (12) /* Bits 12-14: GIO configuration bits */
#define GIO_CFG_MASK (3 << GIO_CFG_SHIFT)
# define GIO_CFG_DEFAULT (0 << GIO_CFG_SHIFT) /* Default, no attribute */
# define GIO_CFG_PULLUP (1 << GIO_CFG_SHIFT) /* Bit 16: Internal pull-up */
# define GIO_CFG_PULLDOWN (2 << GIO_CFG_SHIFT) /* Bit 17: Internal pull-down */
/* Interrupt modes:
*
* .... .... .... .... .... II.. .... ....
*/
#define GIO_INT_SHIFT (10) /* Bits 10-11: GIO interrupt bits */
#define GIO_INT_MASK (3 << GIO_INT_SHIFT)
# define GIO_INT_NONE (0 << GIO_INT_SHIFT)
# define GIO_INT_RISING (1 << GIO_INT_SHIFT)
# define GIO_INT_FALLING (2 << GIO_INT_SHIFT)
# define GIO_INT_BOTHEDGES (3 << GIO_INT_SHIFT)
/* If the pin is an GIO output, then this selects the open drain output
*
* .... .... .... .... .... ..O. .... ....
*/
#define GIO_OPENDRAIN (1 << 9) /* Bit 9: Open drain mode */
/* If the pin is an GIO output, then this identifies the initial output value:
*
* .... .... .... .... .... ...V .... ....
*/
#define GIO_OUTPUT_SET (1 << 8) /* Bit 8: Initial value of output */
#define GIO_OUTPUT_CLEAR (0)
/* This identifies the GIO port:
*
* .... .... .... .... .... .... PPP. ....
*/
#define GIO_PORT_SHIFT (5) /* Bit 5-7: Port number */
#define GIO_PORT_MASK (7 << GIO_PORT_SHIFT)
# define GIO_PORT_GIOA (0 << GIO_PORT_SHIFT)
# define GIO_PORT_GIOB (1 << GIO_PORT_SHIFT)
# define GIO_PORT_GIOC (2 << GIO_PORT_SHIFT)
# define GIO_PORT_GIOD (3 << GIO_PORT_SHIFT)
# define GIO_PORT_GIOE (4 << GIO_PORT_SHIFT)
# define GIO_PORT_GIOF (5 << GIO_PORT_SHIFT)
# define GIO_PORT_GIOG (6 << GIO_PORT_SHIFT)
# define GIO_PORT_GIOH (7 << GIO_PORT_SHIFT)
/* This identifies the bit in the port:
*
* .... .... .... .... .... .... .... .BBB
*/
#define GIO_PIN_SHIFT (0) /* Bits 0-2: GIO number: 0-7 */
#define GIO_PIN_MASK (7 << GIO_PIN_SHIFT)
# define GIO_PIN0 (0 << GIO_PIN_SHIFT)
# define GIO_PIN1 (1 << GIO_PIN_SHIFT)
# define GIO_PIN2 (2 << GIO_PIN_SHIFT)
# define GIO_PIN3 (3 << GIO_PIN_SHIFT)
# define GIO_PIN4 (4 << GIO_PIN_SHIFT)
# define GIO_PIN5 (5 << GIO_PIN_SHIFT)
# define GIO_PIN6 (6 << GIO_PIN_SHIFT)
# define GIO_PIN7 (7 << GIO_PIN_SHIFT)
/************************************************************************************
* Public Types
************************************************************************************/
#ifndef __ASSEMBLY__
/* Must be big enough to hold the 32-bit encoding */
typedef uint16_t gio_pinset_t;
/************************************************************************************
* Public Data
************************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/************************************************************************************
* Inline Functions
************************************************************************************/
/****************************************************************************
* Name: tms570_gio_base
*
* Description:
* Return the base address of the GIO register set
*
****************************************************************************/
static inline uintptr_t tms570_gio_base(gio_pinset_t cfgset)
{
int port = (cfgset & GIO_PORT_MASK) >> GIO_PORT_SHIFT;
return TMS570_GIO_PORTBASE(port);
}
/****************************************************************************
* Name: tms570_gio_port
*
* Description:
* Return the GIO port number
*
****************************************************************************/
static inline int tms570_gio_port(gio_pinset_t cfgset)
{
return (cfgset & GIO_PORT_MASK) >> GIO_PORT_SHIFT;
}
/****************************************************************************
* Name: tms570_gio_pin
*
* Description:
* Return the GIO pin number
*
****************************************************************************/
static inline int tms570_gio_pin(gio_pinset_t cfgset)
{
return (cfgset & GIO_PIN_MASK) >> GIO_PIN_SHIFT;
}
/****************************************************************************
* Name: tms570_gio_pinmask
*
* Description:
* Return the GIO pin bit maskt
*
****************************************************************************/
static inline int tms570_gio_pinmask(gio_pinset_t cfgset)
{
return 1 << ((cfgset & GIO_PIN_MASK) >> GIO_PIN_SHIFT);
}
/************************************************************************************
* Public Function Prototypes
************************************************************************************/
/****************************************************************************
* Name: tms570_gio_initialize
*
* Description:
* Take the GIO block out of reset and assure that it is ready for use.
*
****************************************************************************/
int tms570_gio_initialize(void);
/************************************************************************************
* Name: tms570_gioirq_initialize
*
* Description:
* Initialize logic to support a second level of interrupt decoding for GIO pins.
*
************************************************************************************/
#ifdef CONFIG_TMS570_GIO_IRQ
void tms570_gioirq_initialize(void);
#else
# define tms570_gioirq_initialize()
#endif
/************************************************************************************
* Name: tms570_configgio
*
* Description:
* Configure a GIO pin based on bit-encoded description of the pin.
*
************************************************************************************/
int tms570_configgio(gio_pinset_t cfgset);
/************************************************************************************
* Name: tms570_giowrite
*
* Description:
* Write one or zero to the selected GIO pin
*
************************************************************************************/
void tms570_giowrite(gio_pinset_t pinset, bool value);
/************************************************************************************
* Name: tms570_gioread
*
* Description:
* Read one or zero from the selected GIO pin
*
************************************************************************************/
bool tms570_gioread(gio_pinset_t pinset);
/************************************************************************************
* Name: tms570_gioirq
*
* Description:
* Configure an interrupt for the specified GIO pin.
*
************************************************************************************/
#ifdef CONFIG_TMS570_GIO_IRQ
void tms570_gioirq(gio_pinset_t pinset);
#else
# define tms570_gioirq(pinset)
#endif
/************************************************************************************
* Name: tms570_gioirqenable
*
* Description:
* Enable the interrupt for specified GIO IRQ
*
************************************************************************************/
#ifdef CONFIG_TMS570_GIO_IRQ
void tms570_gioirqenable(int irq);
#else
# define tms570_gioirqenable(irq)
#endif
/************************************************************************************
* Name: tms570_gioirqdisable
*
* Description:
* Disable the interrupt for specified GIO IRQ
*
************************************************************************************/
#ifdef CONFIG_TMS570_GIO_IRQ
void tms570_gioirqdisable(int irq);
#else
# define tms570_gioirqdisable(irq)
#endif
/************************************************************************************
* Function: tms570_dumpgio
*
* Description:
* Dump all GIO registers associated with the base address of the provided pinset.
*
************************************************************************************/
#ifdef CONFIG_DEBUG_GPIO
int tms570_dumpgio(uint32_t pinset, const char *msg);
#else
# define tms570_dumpgio(p,m)
#endif
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_TMS570_TMS570_GIO_H */
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