241 lines
9.0 KiB
C
241 lines
9.0 KiB
C
/********************************************************************************************
|
|
* drivers/ioexpander/tca64.h
|
|
*
|
|
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
|
|
* Author: Sebastien Lorquet <sebastien@lorquet.fr>
|
|
*
|
|
* References:
|
|
* "16-bit I2C-bus and SMBus I/O port with interrupt product datasheet",
|
|
* Rev. 08 - 22 October 2009, NXP
|
|
*
|
|
* 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 __DRIVERS_IOEXPANDER_TCA64XX_H
|
|
#define __DRIVERS_IOEXPANDER_TCA64XX_H
|
|
|
|
/********************************************************************************************
|
|
* Included Files
|
|
********************************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <nuttx/wdog.h>
|
|
#include <nuttx/clock.h>
|
|
#include <nuttx/semaphore.h>
|
|
#include <nuttx/wqueue.h>
|
|
#include <nuttx/ioexpander/ioexpander.h>
|
|
#include <nuttx/ioexpander/tca64xx.h>
|
|
|
|
#include <nuttx/i2c/i2c_master.h>
|
|
#include <nuttx/irq.h>
|
|
|
|
#if defined(CONFIG_IOEXPANDER) && defined(CONFIG_IOEXPANDER_TCA64XX)
|
|
|
|
/********************************************************************************************
|
|
* Pre-processor Definitions
|
|
********************************************************************************************/
|
|
|
|
/* Configuration ****************************************************************************/
|
|
/* Prerequisites:
|
|
* CONFIG_I2C
|
|
* I2C support is required
|
|
* CONFIG_IOEXPANDER
|
|
* Enables I/O expander support
|
|
*
|
|
* CONFIG_IOEXPANDER_TCA64XX
|
|
* Enables support for the TCA64XX driver (Needs CONFIG_INPUT)
|
|
* CONFIG_TCA64XX_MULTIPLE
|
|
* Can be defined to support multiple TCA64XX devices on board.
|
|
* CONFIG_TCA64XX_INT_NCALLBACKS
|
|
* Maximum number of supported pin interrupt callbacks.
|
|
* CONFIG_TCA64XX_INT_POLL
|
|
* Enables a poll for missed interrupts
|
|
* CONFIG_TCA64XX_INT_POLLDELAY
|
|
* If CONFIG_TCA64XX_INT_POLL=y, then this is the delay in microseconds
|
|
* between polls for missed interrupts.
|
|
*/
|
|
|
|
#ifndef CONFIG_I2C
|
|
# error "CONFIG_I2C is required by TCA64XX"
|
|
#endif
|
|
|
|
#ifdef CONFIG_IOEXPANDER_INT_ENABLE
|
|
# ifndef CONFIG_TCA64XX_INT_NCALLBACKS
|
|
# define CONFIG_TCA64XX_INT_NCALLBACKS 4
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_IOEXPANDER_INT_ENABLE
|
|
# ifndef CONFIG_SCHED_WORKQUEUE
|
|
# error Work queue support required. CONFIG_SCHED_WORKQUEUE must be selected.
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef CONFIG_TCA64XX_INT_POLLDELAY
|
|
# define CONFIG_TCA64XX_INT_POLLDELAY 500000
|
|
#endif
|
|
|
|
/* TCA64XX Definitions **********************************************************************/
|
|
|
|
/* I2C frequency */
|
|
|
|
#define TCA64XX_I2C_MAXFREQUENCY 400000 /* 400KHz */
|
|
|
|
/* TCA64XX Parts ****************************************************************************/
|
|
|
|
#define TCA6408_INPUT_REG 0x00
|
|
#define TCA6408_OUTPUT_REG 0x01
|
|
#define TCA6408_POLARITY_REG 0x02
|
|
#define TCA6408_CONFIG_REG 0x03
|
|
|
|
#define TCA6408_NR_GPIOS 8
|
|
|
|
#define TCA6416_INPUT0_REG 0x00
|
|
#define TCA6416_INPUT1_REG 0x01
|
|
#define TCA6416_OUTPUT0_REG 0x02
|
|
#define TCA6416_OUTPUT1_REG 0x03
|
|
#define TCA6416_POLARITY0_REG 0x04
|
|
#define TCA6416_POLARITY1_REG 0x05
|
|
#define TCA6416_CONFIG0_REG 0x06
|
|
#define TCA6416_CONFIG1_REG 0x07
|
|
|
|
#define TCA6416_NR_GPIOS 16
|
|
|
|
#define TCA6424_INPUT0_REG 0x00
|
|
#define TCA6424_INPUT1_REG 0x01
|
|
#define TCA6424_INPUT2_REG 0x02
|
|
#define TCA6424_OUTPUT0_REG 0x04
|
|
#define TCA6424_OUTPUT1_REG 0x05
|
|
#define TCA6424_OUTPUT2_REG 0x06
|
|
#define TCA6424_POLARITY0_REG 0x08
|
|
#define TCA6424_POLARITY1_REG 0x09
|
|
#define TCA6424_POLARITY2_REG 0x0A
|
|
#define TCA6424_CONFIG0_REG 0x0C
|
|
#define TCA6424_CONFIG1_REG 0x0D
|
|
#define TCA6424_CONFIG2_REG 0x0E
|
|
|
|
#define TCA6424_NR_GPIOS 24
|
|
|
|
#define TCA64XX_NR_GPIO_MAX TCA6424_NR_GPIOS
|
|
|
|
/* 1us (datasheet: reset pulse duration (Tw) is 4ns */
|
|
|
|
#define TCA64XX_TW 1
|
|
|
|
/* 1us (datasheet: time to reset (Treset) is 600ns */
|
|
|
|
#define TCA64XX_TRESET 1
|
|
|
|
#define TCA64XX_IRQ_TYPE_EDGE_BOTH 0x00000000
|
|
#define TCA64XX_IRQ_TYPE_EDGE_RISING 0x00000001
|
|
#define TCA64XX_IRQ_TYPE_EDGE_FALLING 0x00000002
|
|
#define TCA64XX_IRQ_TYPE_LEVEL_HIGH 0x00000001
|
|
#define TCA64XX_IRQ_TYPE_LEVEL_LOW 0x00000002
|
|
|
|
#define TCA64XX_IRQ_TYPE_EDGE 0x00000000
|
|
#define TCA64XX_IRQ_TYPE_LEVEL 0x00000001
|
|
|
|
#define TCA64XX_POLLDELAY (CONFIG_TCA64XX_INT_POLLDELAY / USEC_PER_TICK)
|
|
|
|
#define TCA64_LEVEL_SENSITIVE(d,p) \
|
|
(((d)->trigger & ((ioe_pinset_t)1 << (p))) == 0)
|
|
#define TCA64_LEVEL_HIGH(d,p) \
|
|
(((d)->level[0] & ((ioe_pinset_t)1 << (p))) != 0)
|
|
#define TCA64_LEVEL_LOW(d,p) \
|
|
(((d)->level[1] & ((ioe_pinset_t)1 << (p))) != 0)
|
|
|
|
#define TCA64_EDGE_SENSITIVE(d,p) \
|
|
(((d)->trigger & ((ioe_pinset_t)1 << (p))) != 0)
|
|
#define TCA64_EDGE_RISING(d,p) \
|
|
(((d)->level[0] & ((ioe_pinset_t)1 << (p))) != 0)
|
|
#define TCA64_EDGE_FALLING(d,p) \
|
|
(((d)->level[1] & ((ioe_pinset_t)1 << (p))) != 0)
|
|
#define TCA64_EDGE_BOTH(d,p) \
|
|
(TCA64_LEVEL_RISING(d,p) && TCA64_LEVEL_FALLING(d,p))
|
|
|
|
/********************************************************************************************
|
|
* Public Types
|
|
********************************************************************************************/
|
|
|
|
/* This structure represents the configuration of one part */
|
|
|
|
struct tca64_part_s
|
|
{
|
|
uint8_t tp_id; /* Part ID (see enum tca64xx_part_e) */
|
|
uint8_t tp_ngpios; /* Number of supported GPIOs */
|
|
uint8_t tp_input; /* Address of first input register */
|
|
uint8_t tp_output; /* Address of first output register */
|
|
uint8_t tp_polarity; /* Address of first polarity register */
|
|
uint8_t tp_config; /* Address of first configuration register */
|
|
};
|
|
|
|
#ifdef CONFIG_IOEXPANDER_INT_ENABLE
|
|
/* This type represents on registered pin interrupt callback */
|
|
|
|
struct tca64_callback_s
|
|
{
|
|
ioe_pinset_t pinset; /* Set of pin interrupts that will generate
|
|
* the callback. */
|
|
ioe_callback_t cbfunc; /* The saved callback function pointer */
|
|
FAR void *cbarg; /* Callback argument */
|
|
};
|
|
#endif
|
|
|
|
/* This structure represents the state of the TCA64XX driver */
|
|
|
|
struct tca64_dev_s
|
|
{
|
|
struct ioexpander_dev_s dev; /* Nested structure to allow casting as public gpio
|
|
* expander. */
|
|
FAR struct tca64_config_s *config; /* Board configuration data */
|
|
FAR struct i2c_master_s *i2c; /* Saved I2C driver instance */
|
|
uint8_t part; /* TCA64xx part ID (see enum tca64xx_part_e) */
|
|
sem_t exclsem; /* Mutual exclusion */
|
|
|
|
#ifdef CONFIG_IOEXPANDER_INT_ENABLE
|
|
#ifdef CONFIG_TCA64XX_INT_POLL
|
|
WDOG_ID wdog; /* Timer used to poll for missed interrupts */
|
|
#endif
|
|
|
|
ioe_pinset_t input; /* Last input registeres */
|
|
ioe_pinset_t intstat; /* Pending interrupts */
|
|
ioe_pinset_t trigger; /* Bit encoded: 0=level 1=edge */
|
|
ioe_pinset_t level[2]; /* Bit encoded: 01=high/rising, 10 low/falling, 11 both */
|
|
struct work_s work; /* Supports the interrupt handling "bottom half" */
|
|
|
|
/* Saved callback information for each I/O expander client */
|
|
|
|
struct tca64_callback_s cb[CONFIG_TCA64XX_INT_NCALLBACKS];
|
|
#endif
|
|
};
|
|
|
|
#endif /* CONFIG_IOEXPANDER && CONFIG_IOEXPANDER_TCA64XX */
|
|
#endif /* __DRIVERS_IOEXPANDER_TCA64XX_H */
|