boards: rp2040: Add user gpio driver
Add user space gpio driver supporting gpout, gpin, gpint Signed-off-by: Matheus Castello <matheus@castello.eng.br>
This commit is contained in:
Matheus Castello
Alan Carvalho de Assis
parent
0b3c2c7603
commit
f81f973af3
@ -63,6 +63,9 @@
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/* GPIO definitions *********************************************************/
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#define BOARD_GPIO_LED_PIN 25
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#define BOARD_NGPIOOUT 1
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#define BOARD_NGPIOIN 1
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#define BOARD_NGPIOINT 1
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/****************************************************************************
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* Public Types
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@ -32,6 +32,10 @@ ifeq ($(CONFIG_SPI),y)
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CSRCS += rp2040_spi.c
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endif
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ifeq ($(CONFIG_DEV_GPIO),y)
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CSRCS += rp2040_gpio.c
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endif
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DEPPATH += --dep-path board
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VPATH += :board
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CFLAGS += $(shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)board)
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@ -142,5 +142,14 @@ int rp2040_bringup(void)
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}
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#endif
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#ifdef CONFIG_DEV_GPIO
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ret = rp2040_dev_gpio_init();
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if (ret < 0)
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{
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syslog(LOG_ERR, "Failed to initialize GPIO Driver: %d\n", ret);
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return ret;
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}
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#endif
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return ret;
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}
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391
boards/arm/rp2040/raspberrypi-pico/src/rp2040_gpio.c
Normal file
391
boards/arm/rp2040/raspberrypi-pico/src/rp2040_gpio.c
Normal file
@ -0,0 +1,391 @@
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/****************************************************************************
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* boards/arm/rp2040/raspberrypi-pico/src/rp2040_gpio.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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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 <sys/types.h>
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#include <syslog.h>
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#include <nuttx/irq.h>
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#include <arch/irq.h>
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#include <debug.h>
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#include <nuttx/ioexpander/gpio.h>
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#include <arch/board/board.h>
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#include "arm_arch.h"
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#include "chip.h"
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#include "rp2040_gpio.h"
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#if defined(CONFIG_DEV_GPIO) && !defined(CONFIG_GPIO_LOWER_HALF)
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/* Output pins. GPIO25 is onboard LED any other outputs could be used.
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*/
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#define GPIO_OUT1 25
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/* Input pins.
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*/
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#define GPIO_IN1 6
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/* Interrupt pins.
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*/
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#define GPIO_IRQPIN1 14
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct rp2040gpio_dev_s
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{
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struct gpio_dev_s gpio;
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uint8_t id;
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};
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struct rp2040gpint_dev_s
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{
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struct rp2040gpio_dev_s rp2040gpio;
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pin_interrupt_t callback;
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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#if BOARD_NGPIOOUT > 0
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static int gpout_read(FAR struct gpio_dev_s *dev, FAR bool *value);
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static int gpout_write(FAR struct gpio_dev_s *dev, bool value);
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#endif
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#if BOARD_NGPIOIN > 0
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static int gpin_read(FAR struct gpio_dev_s *dev, FAR bool *value);
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#endif
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#if BOARD_NGPIOINT > 0
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static int gpint_read(FAR struct gpio_dev_s *dev, FAR bool *value);
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static int gpint_attach(FAR struct gpio_dev_s *dev,
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pin_interrupt_t callback);
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static int gpint_enable(FAR struct gpio_dev_s *dev, bool enable);
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#if BOARD_NGPIOOUT > 0
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static const struct gpio_operations_s gpout_ops =
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{
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.go_read = gpout_read,
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.go_write = gpout_write,
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.go_attach = NULL,
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.go_enable = NULL,
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};
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/* This array maps the GPIO pins used as OUTPUT */
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static const uint32_t g_gpiooutputs[BOARD_NGPIOOUT] =
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{
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GPIO_OUT1
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};
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static struct rp2040gpio_dev_s g_gpout[BOARD_NGPIOOUT];
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#endif
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#if BOARD_NGPIOIN > 0
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static const struct gpio_operations_s gpin_ops =
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{
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.go_read = gpin_read,
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.go_write = NULL,
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.go_attach = NULL,
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.go_enable = NULL,
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};
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/* This array maps the GPIO pins used as INTERRUPT INPUTS */
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static const uint32_t g_gpioinputs[BOARD_NGPIOIN] =
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{
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GPIO_IN1
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};
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static struct rp2040gpio_dev_s g_gpin[BOARD_NGPIOIN];
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#endif
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#if BOARD_NGPIOINT > 0
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static const struct gpio_operations_s gpint_ops =
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{
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.go_read = gpint_read,
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.go_write = NULL,
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.go_attach = gpint_attach,
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.go_enable = gpint_enable,
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};
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/* This array maps the GPIO pins used as INTERRUPT INPUTS */
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static const uint32_t g_gpiointinputs[BOARD_NGPIOINT] =
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{
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GPIO_IRQPIN1,
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};
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static struct rp2040gpint_dev_s g_gpint[BOARD_NGPIOINT];
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: gpout_read
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****************************************************************************/
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#if BOARD_NGPIOOUT > 0
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static int gpout_read(FAR struct gpio_dev_s *dev, FAR bool *value)
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{
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FAR struct rp2040gpio_dev_s *rp2040gpio =
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(FAR struct rp2040gpio_dev_s *)dev;
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DEBUGASSERT(rp2040gpio != NULL && value != NULL);
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DEBUGASSERT(rp2040gpio->id < BOARD_NGPIOOUT);
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gpioinfo("Reading...\n");
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*value = rp2040_gpio_get(g_gpiooutputs[rp2040gpio->id]);
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return OK;
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}
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/****************************************************************************
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* Name: gpout_write
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****************************************************************************/
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static int gpout_write(FAR struct gpio_dev_s *dev, bool value)
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{
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FAR struct rp2040gpio_dev_s *rp2040gpio =
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(FAR struct rp2040gpio_dev_s *)dev;
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DEBUGASSERT(rp2040gpio != NULL);
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DEBUGASSERT(rp2040gpio->id < BOARD_NGPIOOUT);
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gpioinfo("Writing %d\n", (int)value);
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rp2040_gpio_put(g_gpiooutputs[rp2040gpio->id], value);
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return OK;
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}
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#endif
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/****************************************************************************
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* Name: gpin_read
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****************************************************************************/
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#if BOARD_NGPIOIN > 0
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static int gpin_read(FAR struct gpio_dev_s *dev, FAR bool *value)
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{
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FAR struct rp2040gpio_dev_s *rp2040gpio =
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(FAR struct rp2040gpio_dev_s *)dev;
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DEBUGASSERT(rp2040gpio != NULL && value != NULL);
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DEBUGASSERT(rp2040gpio->id < BOARD_NGPIOIN);
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gpioinfo("Reading... pin %d\n", (int)g_gpioinputs[rp2040gpio->id]);
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*value = rp2040_gpio_get(g_gpioinputs[rp2040gpio->id]);
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return OK;
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}
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#endif
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/****************************************************************************
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* Name: rp2040gpio_interrupt
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****************************************************************************/
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#if BOARD_NGPIOINT > 0
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static int rp2040gpio_interrupt(int irq, void *context, void *arg)
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{
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FAR struct rp2040gpint_dev_s *rp2040gpint =
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(FAR struct rp2040gpint_dev_s *)arg;
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DEBUGASSERT(rp2040gpint != NULL && rp2040gpint->callback != NULL);
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gpioinfo("Interrupt! callback=%p\n", rp2040gpint->callback);
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rp2040gpint->callback(&rp2040gpint->rp2040gpio.gpio,
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rp2040gpint->rp2040gpio.id);
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return OK;
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}
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/****************************************************************************
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* Name: gpint_read
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****************************************************************************/
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static int gpint_read(FAR struct gpio_dev_s *dev, FAR bool *value)
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{
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FAR struct rp2040gpint_dev_s *rp2040gpint =
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(FAR struct rp2040gpint_dev_s *)dev;
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DEBUGASSERT(rp2040gpint != NULL && value != NULL);
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DEBUGASSERT(rp2040gpint->rp2040gpio.id < BOARD_NGPIOINT);
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gpioinfo("Reading int pin...\n");
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*value = rp2040_gpio_get(g_gpiointinputs[rp2040gpint->rp2040gpio.id]);
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return OK;
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}
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/****************************************************************************
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* Name: gpint_attach
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****************************************************************************/
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static int gpint_attach(FAR struct gpio_dev_s *dev,
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pin_interrupt_t callback)
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{
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FAR struct rp2040gpint_dev_s *rp2040gpint =
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(FAR struct rp2040gpint_dev_s *)dev;
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int irq = g_gpiointinputs[rp2040gpint->rp2040gpio.id];
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int ret;
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gpioinfo("Attaching the callback\n");
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/* Make sure the interrupt is disabled */
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rp2040_gpio_disable_irq(irq);
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ret = rp2040_gpio_irq_attach(irq,
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RP2040_GPIO_INTR_EDGE_LOW,
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rp2040gpio_interrupt,
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&g_gpint[rp2040gpint->rp2040gpio.id]);
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: gpint_attach() failed: %d\n", ret);
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return ret;
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}
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gpioinfo("Attach %p\n", callback);
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rp2040gpint->callback = callback;
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return OK;
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}
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/****************************************************************************
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* Name: gpint_enable
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****************************************************************************/
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static int gpint_enable(FAR struct gpio_dev_s *dev, bool enable)
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{
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FAR struct rp2040gpint_dev_s *rp2040gpint =
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(FAR struct rp2040gpint_dev_s *)dev;
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int irq = g_gpiointinputs[rp2040gpint->rp2040gpio.id];
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if (enable)
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{
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if (rp2040gpint->callback != NULL)
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{
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gpioinfo("Enabling the interrupt\n");
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/* Configure the interrupt for rising edge */
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rp2040_gpio_enable_irq(irq);
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}
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}
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else
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{
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gpioinfo("Disable the interrupt\n");
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rp2040_gpio_disable_irq(irq);
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}
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return OK;
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: rp2040_dev_gpio_init
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****************************************************************************/
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int rp2040_dev_gpio_init(void)
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{
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int i;
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int pincount = 0;
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#if BOARD_NGPIOOUT > 0
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for (i = 0; i < BOARD_NGPIOOUT; i++)
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{
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/* Setup and register the GPIO pin */
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g_gpout[i].gpio.gp_pintype = GPIO_OUTPUT_PIN;
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g_gpout[i].gpio.gp_ops = &gpout_ops;
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g_gpout[i].id = i;
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gpio_pin_register(&g_gpout[i].gpio, g_gpiooutputs[i]);
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/* Configure the pins that will be used as output */
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rp2040_gpio_init(g_gpiooutputs[i]);
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rp2040_gpio_setdir(g_gpiooutputs[i], true);
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rp2040_gpio_put(g_gpiooutputs[i], false);
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pincount++;
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}
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#endif
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pincount = 0;
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#if BOARD_NGPIOIN > 0
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for (i = 0; i < BOARD_NGPIOIN; i++)
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{
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/* Setup and register the GPIO pin */
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g_gpin[i].gpio.gp_pintype = GPIO_INPUT_PIN;
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g_gpin[i].gpio.gp_ops = &gpin_ops;
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g_gpin[i].id = i;
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gpio_pin_register(&g_gpin[i].gpio, g_gpioinputs[i]);
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/* Configure the pins that will be used as INPUT */
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rp2040_gpio_init(g_gpioinputs[i]);
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pincount++;
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}
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#endif
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pincount = 0;
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#if BOARD_NGPIOINT > 0
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for (i = 0; i < BOARD_NGPIOINT; i++)
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{
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/* Setup and register the GPIO pin */
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g_gpint[i].rp2040gpio.gpio.gp_pintype = GPIO_INTERRUPT_PIN;
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g_gpint[i].rp2040gpio.gpio.gp_ops = &gpint_ops;
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g_gpint[i].rp2040gpio.id = i;
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gpio_pin_register(&g_gpint[i].rp2040gpio.gpio, g_gpiointinputs[i]);
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/* Configure the pins that will be used as interrupt input */
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rp2040_gpio_init(g_gpiointinputs[i]);
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/* pull-up = false : pull-down = true */
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rp2040_gpio_set_pulls(g_gpiointinputs[i], false, true);
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pincount++;
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}
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#endif
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return OK;
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}
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#endif /* CONFIG_DEV_GPIO && !CONFIG_GPIO_LOWER_HALF */
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@ -29,4 +29,8 @@
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int rp2040_bringup(void);
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#ifdef CONFIG_DEV_GPIO
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int rp2040_dev_gpio_init(void);
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#endif
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#endif /* __BOARDS_ARM_RP2040_RASPBERRYPI_PICO_SRC_RP2040_PICO_H */
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