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nuttx/boards/arm/rp2040/adafruit-kb2040/src/rp2040_gpio.c

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/****************************************************************************
* boards/arm/rp2040/adafruit-kb2040/src/rp2040_gpio.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <syslog.h>
#include <nuttx/irq.h>
#include <arch/irq.h>
#include <assert.h>
#include <debug.h>
#include <nuttx/ioexpander/gpio.h>
#include <arch/board/board.h>
#include "arm_internal.h"
#include "chip.h"
#include "rp2040_gpio.h"
#if defined(CONFIG_DEV_GPIO) && !defined(CONFIG_GPIO_LOWER_HALF)
/* Output pins. GPIO25 is onboard LED any other outputs could be used.
*/
#define GPIO_OUT1 25
/* Input pins.
*/
#define GPIO_IN1 6
/* Interrupt pins.
*/
#define GPIO_IRQPIN1 11
/****************************************************************************
* Private Types
****************************************************************************/
struct rp2040gpio_dev_s
{
struct gpio_dev_s gpio;
uint8_t id;
};
struct rp2040gpint_dev_s
{
struct rp2040gpio_dev_s rp2040gpio;
pin_interrupt_t callback;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
#if BOARD_NGPIOOUT > 0
static int gpout_read(struct gpio_dev_s *dev, bool *value);
static int gpout_write(struct gpio_dev_s *dev, bool value);
#endif
#if BOARD_NGPIOIN > 0
static int gpin_read(struct gpio_dev_s *dev, bool *value);
#endif
#if BOARD_NGPIOINT > 0
static int gpint_read(struct gpio_dev_s *dev, bool *value);
static int gpint_attach(struct gpio_dev_s *dev,
pin_interrupt_t callback);
static int gpint_enable(struct gpio_dev_s *dev, bool enable);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
#if BOARD_NGPIOOUT > 0
static const struct gpio_operations_s gpout_ops =
{
.go_read = gpout_read,
.go_write = gpout_write,
.go_attach = NULL,
.go_enable = NULL,
};
/* This array maps the GPIO pins used as OUTPUT */
static const uint32_t g_gpiooutputs[BOARD_NGPIOOUT] =
{
GPIO_OUT1
};
static struct rp2040gpio_dev_s g_gpout[BOARD_NGPIOOUT];
#endif
#if BOARD_NGPIOIN > 0
static const struct gpio_operations_s gpin_ops =
{
.go_read = gpin_read,
.go_write = NULL,
.go_attach = NULL,
.go_enable = NULL,
};
/* This array maps the GPIO pins used as INTERRUPT INPUTS */
static const uint32_t g_gpioinputs[BOARD_NGPIOIN] =
{
GPIO_IN1
};
static struct rp2040gpio_dev_s g_gpin[BOARD_NGPIOIN];
#endif
#if BOARD_NGPIOINT > 0
static const struct gpio_operations_s gpint_ops =
{
.go_read = gpint_read,
.go_write = NULL,
.go_attach = gpint_attach,
.go_enable = gpint_enable,
};
/* This array maps the GPIO pins used as INTERRUPT INPUTS */
static const uint32_t g_gpiointinputs[BOARD_NGPIOINT] =
{
GPIO_IRQPIN1,
};
static struct rp2040gpint_dev_s g_gpint[BOARD_NGPIOINT];
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: gpout_read
****************************************************************************/
#if BOARD_NGPIOOUT > 0
static int gpout_read(struct gpio_dev_s *dev, bool *value)
{
struct rp2040gpio_dev_s *rp2040gpio =
(struct rp2040gpio_dev_s *)dev;
DEBUGASSERT(rp2040gpio != NULL && value != NULL);
DEBUGASSERT(rp2040gpio->id < BOARD_NGPIOOUT);
gpioinfo("Reading...\n");
*value = rp2040_gpio_get(g_gpiooutputs[rp2040gpio->id]);
return OK;
}
/****************************************************************************
* Name: gpout_write
****************************************************************************/
static int gpout_write(struct gpio_dev_s *dev, bool value)
{
struct rp2040gpio_dev_s *rp2040gpio =
(struct rp2040gpio_dev_s *)dev;
DEBUGASSERT(rp2040gpio != NULL);
DEBUGASSERT(rp2040gpio->id < BOARD_NGPIOOUT);
gpioinfo("Writing %d\n", (int)value);
rp2040_gpio_put(g_gpiooutputs[rp2040gpio->id], value);
return OK;
}
#endif
/****************************************************************************
* Name: gpin_read
****************************************************************************/
#if BOARD_NGPIOIN > 0
static int gpin_read(struct gpio_dev_s *dev, bool *value)
{
struct rp2040gpio_dev_s *rp2040gpio =
(struct rp2040gpio_dev_s *)dev;
DEBUGASSERT(rp2040gpio != NULL && value != NULL);
DEBUGASSERT(rp2040gpio->id < BOARD_NGPIOIN);
gpioinfo("Reading... pin %d\n", (int)g_gpioinputs[rp2040gpio->id]);
*value = rp2040_gpio_get(g_gpioinputs[rp2040gpio->id]);
return OK;
}
#endif
/****************************************************************************
* Name: rp2040gpio_interrupt
****************************************************************************/
#if BOARD_NGPIOINT > 0
static int rp2040gpio_interrupt(int irq, void *context, void *arg)
{
struct rp2040gpint_dev_s *rp2040gpint =
(struct rp2040gpint_dev_s *)arg;
DEBUGASSERT(rp2040gpint != NULL && rp2040gpint->callback != NULL);
gpioinfo("Interrupt! callback=%p\n", rp2040gpint->callback);
rp2040gpint->callback(&rp2040gpint->rp2040gpio.gpio,
rp2040gpint->rp2040gpio.id);
return OK;
}
/****************************************************************************
* Name: gpint_read
****************************************************************************/
static int gpint_read(struct gpio_dev_s *dev, bool *value)
{
struct rp2040gpint_dev_s *rp2040gpint =
(struct rp2040gpint_dev_s *)dev;
DEBUGASSERT(rp2040gpint != NULL && value != NULL);
DEBUGASSERT(rp2040gpint->rp2040gpio.id < BOARD_NGPIOINT);
gpioinfo("Reading int pin...\n");
*value = rp2040_gpio_get(g_gpiointinputs[rp2040gpint->rp2040gpio.id]);
return OK;
}
/****************************************************************************
* Name: gpint_attach
****************************************************************************/
static int gpint_attach(struct gpio_dev_s *dev,
pin_interrupt_t callback)
{
struct rp2040gpint_dev_s *rp2040gpint =
(struct rp2040gpint_dev_s *)dev;
int irq = g_gpiointinputs[rp2040gpint->rp2040gpio.id];
int ret;
gpioinfo("Attaching the callback\n");
/* Make sure the interrupt is disabled */
rp2040_gpio_disable_irq(irq);
ret = rp2040_gpio_irq_attach(irq,
RP2040_GPIO_INTR_EDGE_LOW,
rp2040gpio_interrupt,
&g_gpint[rp2040gpint->rp2040gpio.id]);
if (ret < 0)
{
syslog(LOG_ERR, "ERROR: gpint_attach() failed: %d\n", ret);
return ret;
}
gpioinfo("Attach %p\n", callback);
rp2040gpint->callback = callback;
return OK;
}
/****************************************************************************
* Name: gpint_enable
****************************************************************************/
static int gpint_enable(struct gpio_dev_s *dev, bool enable)
{
struct rp2040gpint_dev_s *rp2040gpint =
(struct rp2040gpint_dev_s *)dev;
int irq = g_gpiointinputs[rp2040gpint->rp2040gpio.id];
if (enable)
{
if (rp2040gpint->callback != NULL)
{
gpioinfo("Enabling the interrupt\n");
/* Configure the interrupt for rising edge */
rp2040_gpio_enable_irq(irq);
}
}
else
{
gpioinfo("Disable the interrupt\n");
rp2040_gpio_disable_irq(irq);
}
return OK;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: rp2040_dev_gpio_init
****************************************************************************/
int rp2040_dev_gpio_init(void)
{
int i;
int pincount = 0;
#if BOARD_NGPIOOUT > 0
for (i = 0; i < BOARD_NGPIOOUT; i++)
{
/* Setup and register the GPIO pin */
g_gpout[i].gpio.gp_pintype = GPIO_OUTPUT_PIN;
g_gpout[i].gpio.gp_ops = &gpout_ops;
g_gpout[i].id = i;
gpio_pin_register(&g_gpout[i].gpio, g_gpiooutputs[i]);
/* Configure the pins that will be used as output */
rp2040_gpio_init(g_gpiooutputs[i]);
rp2040_gpio_setdir(g_gpiooutputs[i], true);
rp2040_gpio_put(g_gpiooutputs[i], false);
pincount++;
}
#endif
pincount = 0;
#if BOARD_NGPIOIN > 0
for (i = 0; i < BOARD_NGPIOIN; i++)
{
/* Setup and register the GPIO pin */
g_gpin[i].gpio.gp_pintype = GPIO_INPUT_PIN;
g_gpin[i].gpio.gp_ops = &gpin_ops;
g_gpin[i].id = i;
gpio_pin_register(&g_gpin[i].gpio, g_gpioinputs[i]);
/* Configure the pins that will be used as INPUT */
rp2040_gpio_init(g_gpioinputs[i]);
pincount++;
}
#endif
pincount = 0;
#if BOARD_NGPIOINT > 0
for (i = 0; i < BOARD_NGPIOINT; i++)
{
/* Setup and register the GPIO pin */
g_gpint[i].rp2040gpio.gpio.gp_pintype = GPIO_INTERRUPT_PIN;
g_gpint[i].rp2040gpio.gpio.gp_ops = &gpint_ops;
g_gpint[i].rp2040gpio.id = i;
gpio_pin_register(&g_gpint[i].rp2040gpio.gpio, g_gpiointinputs[i]);
/* Configure the pins that will be used as interrupt input */
rp2040_gpio_init(g_gpiointinputs[i]);
/* pull-up = false : pull-down = true */
rp2040_gpio_set_pulls(g_gpiointinputs[i], false, true);
pincount++;
}
#endif
return OK;
}
#endif /* CONFIG_DEV_GPIO && !CONFIG_GPIO_LOWER_HALF */
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