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/*
* Copyright (c) 2016 Freescale Semiconductor, Inc.
* Copyright (c) 2017, NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nxp_kinetis_gpio
#include <errno.h>
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/dt-bindings/gpio/nxp-kinetis-gpio.h>
#include <soc.h>
#include <fsl_common.h>
#include <fsl_port.h>
#include "gpio_utils.h"
struct gpio_mcux_config {
/* gpio_driver_config needs to be first */
struct gpio_driver_config common;
GPIO_Type *gpio_base;
PORT_Type *port_base;
unsigned int flags;
};
struct gpio_mcux_data {
/* gpio_driver_data needs to be first */
struct gpio_driver_data common;
/* port ISR callback routine address */
sys_slist_t callbacks;
};
static int gpio_mcux_configure(const struct device *dev,
gpio_pin_t pin, gpio_flags_t flags)
{
const struct gpio_mcux_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
PORT_Type *port_base = config->port_base;
uint32_t mask = 0U;
uint32_t pcr = 0U;
/* Check for an invalid pin number */
if (pin >= ARRAY_SIZE(port_base->PCR)) {
return -EINVAL;
}
if (((flags & GPIO_INPUT) != 0) && ((flags & GPIO_OUTPUT) != 0)) {
return -ENOTSUP;
}
if ((flags & GPIO_SINGLE_ENDED) != 0) {
return -ENOTSUP;
}
/* The flags contain options that require touching registers in the
* GPIO module and the corresponding PORT module.
*
* Start with the GPIO module and set up the pin direction register.
* 0 - pin is input, 1 - pin is output
*/
switch (flags & GPIO_DIR_MASK) {
case GPIO_INPUT:
gpio_base->PDDR &= ~BIT(pin);
break;
case GPIO_OUTPUT:
if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0) {
gpio_base->PSOR = BIT(pin);
} else if ((flags & GPIO_OUTPUT_INIT_LOW) != 0) {
gpio_base->PCOR = BIT(pin);
}
gpio_base->PDDR |= BIT(pin);
break;
default:
return -ENOTSUP;
}
/* Set PCR mux to GPIO for the pin we are configuring */
mask |= PORT_PCR_MUX_MASK;
pcr |= PORT_PCR_MUX(kPORT_MuxAsGpio);
/* Now do the PORT module. Figure out the pullup/pulldown
* configuration, but don't write it to the PCR register yet.
*/
mask |= PORT_PCR_PE_MASK | PORT_PCR_PS_MASK;
if ((flags & GPIO_PULL_UP) != 0) {
/* Enable the pull and select the pullup resistor. */
pcr |= PORT_PCR_PE_MASK | PORT_PCR_PS_MASK;
} else if ((flags & GPIO_PULL_DOWN) != 0) {
/* Enable the pull and select the pulldown resistor (deselect
* the pullup resistor.
*/
pcr |= PORT_PCR_PE_MASK;
}
#if defined(FSL_FEATURE_PORT_HAS_DRIVE_STRENGTH) && FSL_FEATURE_PORT_HAS_DRIVE_STRENGTH
/* Determine the drive strength */
switch (flags & KINETIS_GPIO_DS_MASK) {
case KINETIS_GPIO_DS_DFLT:
/* Default is low drive strength */
mask |= PORT_PCR_DSE_MASK;
break;
case KINETIS_GPIO_DS_ALT:
/* Alternate is high drive strength */
pcr |= PORT_PCR_DSE_MASK;
break;
default:
return -ENOTSUP;
}
#endif /* defined(FSL_FEATURE_PORT_HAS_DRIVE_STRENGTH) && FSL_FEATURE_PORT_HAS_DRIVE_STRENGTH */
/* Accessing by pin, we only need to write one PCR register. */
port_base->PCR[pin] = (port_base->PCR[pin] & ~mask) | pcr;
return 0;
}
static int gpio_mcux_port_get_raw(const struct device *dev, uint32_t *value)
{
const struct gpio_mcux_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
*value = gpio_base->PDIR;
return 0;
}
static int gpio_mcux_port_set_masked_raw(const struct device *dev,
uint32_t mask,
uint32_t value)
{
const struct gpio_mcux_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
gpio_base->PDOR = (gpio_base->PDOR & ~mask) | (mask & value);
return 0;
}
static int gpio_mcux_port_set_bits_raw(const struct device *dev,
uint32_t mask)
{
const struct gpio_mcux_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
gpio_base->PSOR = mask;
return 0;
}
static int gpio_mcux_port_clear_bits_raw(const struct device *dev,
uint32_t mask)
{
const struct gpio_mcux_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
gpio_base->PCOR = mask;
return 0;
}
static int gpio_mcux_port_toggle_bits(const struct device *dev, uint32_t mask)
{
const struct gpio_mcux_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
gpio_base->PTOR = mask;
return 0;
}
static uint32_t get_port_pcr_irqc_value_from_flags(const struct device *dev,
uint32_t pin,
enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
port_interrupt_t port_interrupt = 0;
if (mode == GPIO_INT_MODE_DISABLED) {
port_interrupt = kPORT_InterruptOrDMADisabled;
} else {
if (mode == GPIO_INT_MODE_LEVEL) {
if (trig == GPIO_INT_TRIG_LOW) {
port_interrupt = kPORT_InterruptLogicZero;
} else {
port_interrupt = kPORT_InterruptLogicOne;
}
} else {
switch (trig) {
case GPIO_INT_TRIG_LOW:
port_interrupt = kPORT_InterruptFallingEdge;
break;
case GPIO_INT_TRIG_HIGH:
port_interrupt = kPORT_InterruptRisingEdge;
break;
case GPIO_INT_TRIG_BOTH:
port_interrupt = kPORT_InterruptEitherEdge;
break;
}
}
}
return PORT_PCR_IRQC(port_interrupt);
}
static int gpio_mcux_pin_interrupt_configure(const struct device *dev,
gpio_pin_t pin, enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
const struct gpio_mcux_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
PORT_Type *port_base = config->port_base;
/* Check for an invalid pin number */
if (pin >= ARRAY_SIZE(port_base->PCR)) {
return -EINVAL;
}
/* Check for an invalid pin configuration */
if ((mode != GPIO_INT_MODE_DISABLED) &&
((gpio_base->PDDR & BIT(pin)) != 0)) {
return -EINVAL;
}
/* Check if GPIO port supports interrupts */
if ((mode != GPIO_INT_MODE_DISABLED) &&
((config->flags & GPIO_INT_ENABLE) == 0U)) {
return -ENOTSUP;
}
uint32_t pcr = get_port_pcr_irqc_value_from_flags(dev, pin, mode, trig);
port_base->PCR[pin] = (port_base->PCR[pin] & ~PORT_PCR_IRQC_MASK) | pcr;
return 0;
}
static int gpio_mcux_manage_callback(const struct device *dev,
struct gpio_callback *callback, bool set)
{
struct gpio_mcux_data *data = dev->data;
return gpio_manage_callback(&data->callbacks, callback, set);
}
static void gpio_mcux_port_isr(const struct device *dev)
{
const struct gpio_mcux_config *config = dev->config;
struct gpio_mcux_data *data = dev->data;
uint32_t int_status;
int_status = config->port_base->ISFR;
/* Clear the port interrupts */
config->port_base->ISFR = int_status;
gpio_fire_callbacks(&data->callbacks, dev, int_status);
}
#ifdef CONFIG_GPIO_GET_DIRECTION
static int gpio_mcux_port_get_direction(const struct device *dev, gpio_port_pins_t map,
gpio_port_pins_t *inputs, gpio_port_pins_t *outputs)
{
const struct gpio_mcux_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
map &= config->common.port_pin_mask;
if (inputs != NULL) {
*inputs = map & (~gpio_base->PDDR);
}
if (outputs != NULL) {
*outputs = map & gpio_base->PDDR;
}
return 0;
}
#endif /* CONFIG_GPIO_GET_DIRECTION */
static const struct gpio_driver_api gpio_mcux_driver_api = {
.pin_configure = gpio_mcux_configure,
.port_get_raw = gpio_mcux_port_get_raw,
.port_set_masked_raw = gpio_mcux_port_set_masked_raw,
.port_set_bits_raw = gpio_mcux_port_set_bits_raw,
.port_clear_bits_raw = gpio_mcux_port_clear_bits_raw,
.port_toggle_bits = gpio_mcux_port_toggle_bits,
.pin_interrupt_configure = gpio_mcux_pin_interrupt_configure,
.manage_callback = gpio_mcux_manage_callback,
#ifdef CONFIG_GPIO_GET_DIRECTION
.port_get_direction = gpio_mcux_port_get_direction,
#endif /* CONFIG_GPIO_GET_DIRECTION */
};
#define GPIO_MCUX_IRQ_INIT(n) \
do { \
IRQ_CONNECT(DT_INST_IRQN(n), \
DT_INST_IRQ(n, priority), \
gpio_mcux_port_isr, \
DEVICE_DT_INST_GET(n), 0); \
\
irq_enable(DT_INST_IRQN(n)); \
} while (0)
#define GPIO_PORT_BASE_ADDR(n) DT_REG_ADDR(DT_INST_PHANDLE(n, nxp_kinetis_port))
#define GPIO_DEVICE_INIT_MCUX(n) \
static int gpio_mcux_port## n ## _init(const struct device *dev); \
\
static const struct gpio_mcux_config gpio_mcux_port## n ## _config = {\
.common = { \
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n),\
}, \
.gpio_base = (GPIO_Type *) DT_INST_REG_ADDR(n), \
.port_base = (PORT_Type *) GPIO_PORT_BASE_ADDR(n), \
.flags = UTIL_AND(DT_INST_IRQ_HAS_IDX(n, 0), GPIO_INT_ENABLE),\
}; \
\
static struct gpio_mcux_data gpio_mcux_port## n ##_data; \
\
DEVICE_DT_INST_DEFINE(n, \
gpio_mcux_port## n ##_init, \
NULL, \
&gpio_mcux_port## n ##_data, \
&gpio_mcux_port## n##_config, \
POST_KERNEL, \
CONFIG_GPIO_INIT_PRIORITY, \
&gpio_mcux_driver_api); \
\
static int gpio_mcux_port## n ##_init(const struct device *dev) \
{ \
IF_ENABLED(DT_INST_IRQ_HAS_IDX(n, 0), \
(GPIO_MCUX_IRQ_INIT(n);)) \
return 0; \
}
DT_INST_FOREACH_STATUS_OKAY(GPIO_DEVICE_INIT_MCUX)