nuttx/boards/risc-v/espressif/esp32h2-generic/src/esp32h2_gpio.c

513 lines
14 KiB
C

/****************************************************************************
* boards/risc-v/espressif/esp32h2-generic/src/esp32h2_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
****************************************************************************/
/* Config */
#include <nuttx/config.h>
/* Libc */
#include <sys/types.h>
#include <syslog.h>
#include <assert.h>
#include <debug.h>
/* NuttX */
#include <arch/irq.h>
#include <nuttx/irq.h>
#include <nuttx/ioexpander/gpio.h>
/* Arch */
#include "esp_gpio.h"
/* Board */
#include "esp32h2-generic.h"
#include <arch/board/board.h>
/* HAL */
#include <arch/chip/gpio_sig_map.h>
#if defined(CONFIG_DEV_GPIO) && !defined(CONFIG_GPIO_LOWER_HALF)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Pin 1 and 2 are used for this example as GPIO outputs. */
#define GPIO_OUT1 1
#define GPIO_OUT2 2
#if !defined(CONFIG_ESPRESSIF_GPIO_IRQ) && BOARD_NGPIOINT > 0
# error "NGPIOINT is > 0 and GPIO interrupts aren't enabled"
#endif
/* Interrupt pins. GPIO9 is used as an example, any other inputs could be
* used.
*/
#define GPIO_IRQPIN 9
/****************************************************************************
* Private Types
****************************************************************************/
struct espgpio_dev_s
{
struct gpio_dev_s gpio;
uint8_t id;
};
struct espgpint_dev_s
{
struct espgpio_dev_s espgpio;
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);
static int gpout_setpintype(struct gpio_dev_s *dev,
enum gpio_pintype_e pintype);
#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);
static int gpint_setpintype(struct gpio_dev_s *dev,
enum gpio_pintype_e pintype);
#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,
.go_setpintype = gpout_setpintype,
};
/* This array maps the GPIO pins used as OUTPUT */
static const uint32_t g_gpiooutputs[BOARD_NGPIOOUT] =
{
GPIO_OUT1, GPIO_OUT2
};
static struct espgpio_dev_s g_gpout[BOARD_NGPIOOUT];
#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,
.go_setpintype = gpint_setpintype,
};
/* This array maps the GPIO pins used as INTERRUPT INPUTS */
static const uint32_t g_gpiointinputs[BOARD_NGPIOINT] =
{
GPIO_IRQPIN,
};
static struct espgpint_dev_s g_gpint[BOARD_NGPIOINT];
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: gpout_read
*
* Description:
* Read a digital output pin.
*
* Parameters:
* dev - A pointer to the gpio driver struct.
* value - A pointer to store the state of the pin.
*
* Returned Value:
* Zero (OK).
*
****************************************************************************/
#if BOARD_NGPIOOUT > 0
static int gpout_read(struct gpio_dev_s *dev, bool *value)
{
struct espgpio_dev_s *espgpio = (struct espgpio_dev_s *)dev;
DEBUGASSERT(espgpio != NULL && value != NULL);
DEBUGASSERT(espgpio->id < BOARD_NGPIOOUT);
gpioinfo("Reading...\n");
*value = esp_gpioread(g_gpiooutputs[espgpio->id]);
return OK;
}
/****************************************************************************
* Name: gpout_write
*
* Description:
* Write to a digital output pin.
*
* Parameters:
* dev - A pointer to the gpio driver struct.
* value - The value to be written.
*
* Returned Value:
* Zero (OK).
*
****************************************************************************/
static int gpout_write(struct gpio_dev_s *dev, bool value)
{
struct espgpio_dev_s *espgpio = (struct espgpio_dev_s *)dev;
DEBUGASSERT(espgpio != NULL);
DEBUGASSERT(espgpio->id < BOARD_NGPIOOUT);
gpioinfo("Writing %d\n", (int)value);
esp_gpiowrite(g_gpiooutputs[espgpio->id], value);
return OK;
}
/****************************************************************************
* Name: gpout_setpintype
*
* Description:
* Set digital output pin type.
*
* Parameters:
* dev - A pointer to the gpio driver struct.
* pintype - The pin type. See nuttx/ioexpander/gpio.h.
*
* Returned Value:
* Zero (OK) on success; -1 (ERROR) otherwise.
*
****************************************************************************/
static int gpout_setpintype(struct gpio_dev_s *dev,
enum gpio_pintype_e pintype)
{
struct espgpio_dev_s *espgpio = (struct espgpio_dev_s *)dev;
DEBUGASSERT(espgpio != NULL);
DEBUGASSERT(espgpio->id < BOARD_NGPIOOUT);
gpioinfo("Setting pintype: %d\n", (int)pintype);
esp_gpio_matrix_out(g_gpiooutputs[espgpio->id],
SIG_GPIO_OUT_IDX, 0, 0);
switch (pintype)
{
case GPIO_INPUT_PIN:
esp_configgpio(g_gpiooutputs[espgpio->id], INPUT);
break;
case GPIO_INPUT_PIN_PULLUP:
esp_configgpio(g_gpiooutputs[espgpio->id], INPUT_PULLUP);
break;
case GPIO_INPUT_PIN_PULLDOWN:
esp_configgpio(g_gpiooutputs[espgpio->id], INPUT_PULLDOWN);
break;
case GPIO_OUTPUT_PIN:
esp_configgpio(g_gpiooutputs[espgpio->id], INPUT | OUTPUT);
break;
case GPIO_OUTPUT_PIN_OPENDRAIN:
esp_configgpio(g_gpiooutputs[espgpio->id],
INPUT | OUTPUT_OPEN_DRAIN);
break;
default:
return ERROR;
break;
}
return OK;
}
#endif
/****************************************************************************
* Name: espgpio_interrupt
*
* Description:
* Digital input interrupt handler.
*
* Input Parameters:
* irq - Identifier of the interrupt request.
* context - Context data from the ISR.
* arg - Opaque pointer to the internal driver state structure.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned
* on failure.
*
****************************************************************************/
#if BOARD_NGPIOINT > 0
static int espgpio_interrupt(int irq, void *context, void *arg)
{
struct espgpint_dev_s *espgpint = (struct espgpint_dev_s *)arg;
DEBUGASSERT(espgpint != NULL && espgpint->callback != NULL);
gpioinfo("Interrupt! callback=%p\n", espgpint->callback);
espgpint->callback(&espgpint->espgpio.gpio, espgpint->espgpio.id);
return OK;
}
/****************************************************************************
* Name: gpint_read
*
* Description:
* Read a digital input pin.
*
* Parameters:
* dev - A pointer to the gpio driver struct.
* value - A pointer to store the state of the pin.
*
* Returned Value:
* Zero (OK).
*
****************************************************************************/
static int gpint_read(struct gpio_dev_s *dev, bool *value)
{
struct espgpint_dev_s *espgpint =
(struct espgpint_dev_s *)dev;
DEBUGASSERT(espgpint != NULL && value != NULL);
DEBUGASSERT(espgpint->espgpio.id < BOARD_NGPIOINT);
gpioinfo("Reading int pin...\n");
*value = esp_gpioread(g_gpiointinputs[espgpint->espgpio.id]);
return OK;
}
/****************************************************************************
* Name: gpint_attach
*
* Description:
* Attach the ISR to IRQ and register the callback. But it still doesn't
* enable interrupt yet.
*
* Parameters:
* dev - A pointer to the gpio driver struct.
* callback - User callback function.
*
* Returned Value:
* Zero (OK) is returned on success; A negated errno value is returned
* to indicate the nature of any failure.
*
****************************************************************************/
static int gpint_attach(struct gpio_dev_s *dev,
pin_interrupt_t callback)
{
struct espgpint_dev_s *espgpint =
(struct espgpint_dev_s *)dev;
int irq = ESP_PIN2IRQ(g_gpiointinputs[espgpint->espgpio.id]);
int ret;
gpioinfo("Attaching the callback\n");
/* Make sure the interrupt is disabled */
esp_gpioirqdisable(irq);
ret = irq_attach(irq,
espgpio_interrupt,
&g_gpint[espgpint->espgpio.id]);
if (ret < 0)
{
syslog(LOG_ERR, "ERROR: gpint_attach() failed: %d\n", ret);
return ret;
}
gpioinfo("Attach %p\n", callback);
espgpint->callback = callback;
return OK;
}
/****************************************************************************
* Name: gpint_enable
*
* Description:
* Enable/Disable interrupt.
*
* Parameters:
* dev - A pointer to the gpio driver struct.
* enable - True to enable, false to disable.
*
* Returned Value:
* Zero (OK).
*
****************************************************************************/
static int gpint_enable(struct gpio_dev_s *dev, bool enable)
{
struct espgpint_dev_s *espgpint = (struct espgpint_dev_s *)dev;
int irq = ESP_PIN2IRQ(g_gpiointinputs[espgpint->espgpio.id]);
if (enable)
{
if (espgpint->callback != NULL)
{
gpioinfo("Enabling the interrupt\n");
/* Configure the interrupt for rising edge */
esp_gpioirqenable(irq, RISING);
}
}
else
{
gpioinfo("Disable the interrupt\n");
esp_gpioirqdisable(irq);
}
return OK;
}
/****************************************************************************
* Name: gpint_setpintype
*
* Description:
* Set digital interrupt pin type.
*
* Parameters:
* dev - A pointer to the gpio driver struct.
* pintype - The pin type. See nuttx/ioexpander/gpio.h.
*
* Returned Value:
* Zero (OK) on success; -1 (ERROR) otherwise.
*
****************************************************************************/
static int gpint_setpintype(struct gpio_dev_s *dev,
enum gpio_pintype_e pintype)
{
struct espgpint_dev_s *espgpint = (struct espgpint_dev_s *)dev;
DEBUGASSERT(espgpint != NULL);
DEBUGASSERT(espgpint->espgpio.id < BOARD_NGPIOINT);
gpioinfo("Setting pintype: %d\n", (int)pintype);
switch (pintype)
{
case GPIO_INTERRUPT_HIGH_PIN:
esp_configgpio(g_gpiointinputs[espgpint->espgpio.id],
INPUT_PULLUP);
break;
case GPIO_INTERRUPT_LOW_PIN:
esp_configgpio(g_gpiointinputs[espgpint->espgpio.id],
INPUT_PULLDOWN);
break;
default:
return ERROR;
break;
}
return OK;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: esp_gpio_init
*
* Description:
* Configure the GPIO driver.
*
* Returned Value:
* Zero (OK).
*
****************************************************************************/
int esp_gpio_init(void)
{
int pincount = 0;
int i;
#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, pincount);
/* Configure the pins that will be used as output */
esp_gpio_matrix_out(g_gpiooutputs[i], SIG_GPIO_OUT_IDX, 0, 0);
esp_configgpio(g_gpiooutputs[i], OUTPUT_FUNCTION_1 | INPUT_FUNCTION_1);
esp_gpiowrite(g_gpiooutputs[i], 0);
pincount++;
}
#endif
#if BOARD_NGPIOINT > 0
for (i = 0; i < BOARD_NGPIOINT; i++)
{
/* Setup and register the GPIO pin */
g_gpint[i].espgpio.gpio.gp_pintype = GPIO_INTERRUPT_PIN;
g_gpint[i].espgpio.gpio.gp_ops = &gpint_ops;
g_gpint[i].espgpio.id = i;
gpio_pin_register(&g_gpint[i].espgpio.gpio, pincount);
/* Configure the pins that will be used as interrupt input */
esp_configgpio(g_gpiointinputs[i], INPUT_FUNCTION_1 | PULLDOWN);
pincount++;
}
#endif
return OK;
}
#endif /* CONFIG_DEV_GPIO && !CONFIG_GPIO_LOWER_HALF */