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zephyr/drivers/gpio/gpio_mcux_lpc.c
Declan Snyder 17ab3d5deb drivers: gpio: mcux_lpc: Support MCI_IO_MUX 
Support MCI_IO_MUX pinctrl in LPC GPIO driver

Signed-off-by: Declan Snyder <declan.snyder@nxp.com>
Co-authored-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
2024-03-13 16:45:13 +00:00

483 lines
13 KiB
C
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/*
* Copyright 2017-2020,2022-2023 NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nxp_lpc_gpio
/** @file
* @brief GPIO driver for LPC54XXX family
*
* Note:
* - fsl_pint internally tries to manage interrupts, but this is not used (e.g.
* s_pintCallback), Zephyr's interrupt management system is used in place.
*/
#include <errno.h>
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/irq.h>
#include <soc.h>
#include <fsl_common.h>
#include <zephyr/drivers/gpio/gpio_utils.h>
#ifdef CONFIG_NXP_PINT
#include <zephyr/drivers/interrupt_controller/nxp_pint.h>
#endif
#include <fsl_gpio.h>
#include <fsl_device_registers.h>
#ifdef MCI_IO_MUX
#include <zephyr/drivers/pinctrl.h>
#endif
/* Interrupt sources, matching int-source enum in DTS binding definition */
#define INT_SOURCE_PINT 0
#define INT_SOURCE_INTA 1
#define INT_SOURCE_INTB 2
#define INT_SOURCE_NONE 3
struct gpio_mcux_lpc_config {
/* gpio_driver_config needs to be first */
struct gpio_driver_config common;
GPIO_Type *gpio_base;
uint8_t int_source;
#ifdef IOPCTL
IOPCTL_Type *pinmux_base;
#endif
#ifdef IOCON
IOCON_Type *pinmux_base;
#endif
#ifdef MCI_IO_MUX
MCI_IO_MUX_Type * pinmux_base;
#endif
uint32_t port_no;
};
struct gpio_mcux_lpc_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_lpc_configure(const struct device *dev, gpio_pin_t pin,
gpio_flags_t flags)
{
const struct gpio_mcux_lpc_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
uint32_t port = config->port_no;
if (((flags & GPIO_INPUT) != 0) && ((flags & GPIO_OUTPUT) != 0)) {
return -ENOTSUP;
}
#ifdef IOPCTL /* RT600 and RT500 series */
IOPCTL_Type *pinmux_base = config->pinmux_base;
volatile uint32_t *pinconfig = (volatile uint32_t *)&(pinmux_base->PIO[port][pin]);
/*
* Enable input buffer for both input and output pins, it costs
* nothing and allows values to be read back.
*/
*pinconfig |= IOPCTL_PIO_INBUF_EN;
if ((flags & GPIO_SINGLE_ENDED) != 0) {
*pinconfig |= IOPCTL_PIO_PSEDRAIN_EN;
} else {
*pinconfig &= ~IOPCTL_PIO_PSEDRAIN_EN;
}
/* Select GPIO mux for this pin (func 0 is always GPIO) */
*pinconfig &= ~(IOPCTL_PIO_FSEL_MASK);
#endif
#ifdef IOCON /* LPC SOCs */
volatile uint32_t *pinconfig;
IOCON_Type *pinmux_base;
pinmux_base = config->pinmux_base;
pinconfig = (volatile uint32_t *)&(pinmux_base->PIO[port][pin]);
if ((flags & GPIO_SINGLE_ENDED) != 0) {
/* Set ODE bit. */
*pinconfig |= IOCON_PIO_OD_MASK;
}
if ((flags & GPIO_INPUT) != 0) {
/* Set DIGIMODE bit */
*pinconfig |= IOCON_PIO_DIGIMODE_MASK;
}
/* Select GPIO mux for this pin (func 0 is always GPIO) */
*pinconfig &= ~(IOCON_PIO_FUNC_MASK);
#endif
#ifdef MCI_IO_MUX /* RW61x SOCs */
/* Construct a pin control state, and apply it directly. */
pinctrl_soc_pin_t pin_cfg;
if (config->port_no == 1) {
pin_cfg = IOMUX_GPIO_IDX(pin + 32) | IOMUX_TYPE(IOMUX_GPIO);
} else {
pin_cfg = IOMUX_GPIO_IDX(pin) | IOMUX_TYPE(IOMUX_GPIO);
}
/* Add pull up flags, if required */
if ((flags & GPIO_PULL_UP) != 0) {
pin_cfg |= IOMUX_PAD_PULL(0x1);
} else if ((flags & GPIO_PULL_DOWN) != 0) {
pin_cfg |= IOMUX_PAD_PULL(0x2);
}
pinctrl_configure_pins(&pin_cfg, 1, 0);
#endif
if (flags & (GPIO_PULL_UP | GPIO_PULL_DOWN)) {
#ifdef IOPCTL /* RT600 and RT500 series */
*pinconfig |= IOPCTL_PIO_PUPD_EN;
if ((flags & GPIO_PULL_UP) != 0) {
*pinconfig |= IOPCTL_PIO_PULLUP_EN;
} else if ((flags & GPIO_PULL_DOWN) != 0) {
*pinconfig &= ~(IOPCTL_PIO_PULLUP_EN);
}
#endif
#ifdef IOCON /* LPC SOCs */
*pinconfig &= ~(IOCON_PIO_MODE_PULLUP|IOCON_PIO_MODE_PULLDOWN);
if ((flags & GPIO_PULL_UP) != 0) {
*pinconfig |= IOCON_PIO_MODE_PULLUP;
} else if ((flags & GPIO_PULL_DOWN) != 0) {
*pinconfig |= IOCON_PIO_MODE_PULLDOWN;
}
#endif
} else {
#ifdef IOPCTL /* RT600 and RT500 series */
*pinconfig &= ~IOPCTL_PIO_PUPD_EN;
#endif
#ifdef IOCON /* LPC SOCs */
*pinconfig &= ~(IOCON_PIO_MODE_PULLUP|IOCON_PIO_MODE_PULLDOWN);
#endif
#ifdef MCI_IO_MUX
#endif
}
/* supports access by pin now,you can add access by port when needed */
if (flags & GPIO_OUTPUT_INIT_HIGH) {
gpio_base->SET[port] = BIT(pin);
}
if (flags & GPIO_OUTPUT_INIT_LOW) {
gpio_base->CLR[port] = BIT(pin);
}
/* input-0,output-1 */
WRITE_BIT(gpio_base->DIR[port], pin, flags & GPIO_OUTPUT);
return 0;
}
static int gpio_mcux_lpc_port_get_raw(const struct device *dev,
uint32_t *value)
{
const struct gpio_mcux_lpc_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
*value = gpio_base->PIN[config->port_no];
return 0;
}
static int gpio_mcux_lpc_port_set_masked_raw(const struct device *dev,
uint32_t mask,
uint32_t value)
{
const struct gpio_mcux_lpc_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
uint32_t port = config->port_no;
/* Writing 0 allows R+W, 1 disables the pin */
gpio_base->MASK[port] = ~mask;
gpio_base->MPIN[port] = value;
/* Enable back the pins, user won't assume pins remain masked*/
gpio_base->MASK[port] = 0U;
return 0;
}
static int gpio_mcux_lpc_port_set_bits_raw(const struct device *dev,
uint32_t mask)
{
const struct gpio_mcux_lpc_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
gpio_base->SET[config->port_no] = mask;
return 0;
}
static int gpio_mcux_lpc_port_clear_bits_raw(const struct device *dev,
uint32_t mask)
{
const struct gpio_mcux_lpc_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
gpio_base->CLR[config->port_no] = mask;
return 0;
}
static int gpio_mcux_lpc_port_toggle_bits(const struct device *dev,
uint32_t mask)
{
const struct gpio_mcux_lpc_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
gpio_base->NOT[config->port_no] = mask;
return 0;
}
#ifdef CONFIG_NXP_PINT
/* Called by PINT when pin interrupt fires */
static void gpio_mcux_lpc_pint_cb(uint8_t pin, void *user)
{
const struct device *dev = user;
const struct gpio_mcux_lpc_config *config = dev->config;
struct gpio_mcux_lpc_data *data = dev->data;
uint32_t gpio_pin;
/* Subtract port number times 32 from pin number to get GPIO API
* pin number.
*/
gpio_pin = pin - (config->port_no * 32);
gpio_fire_callbacks(&data->callbacks, dev, BIT(gpio_pin));
}
/* Installs interrupt handler using PINT interrupt controller. */
static int gpio_mcux_lpc_pint_interrupt_cfg(const struct device *dev,
gpio_pin_t pin,
enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
const struct gpio_mcux_lpc_config *config = dev->config;
enum nxp_pint_trigger interrupt_mode = NXP_PINT_NONE;
uint32_t port = config->port_no;
int ret;
switch (mode) {
case GPIO_INT_MODE_DISABLED:
nxp_pint_pin_disable((port * 32) + pin);
return 0;
case GPIO_INT_MODE_LEVEL:
if (trig == GPIO_INT_TRIG_HIGH) {
interrupt_mode = NXP_PINT_HIGH;
} else if (trig == GPIO_INT_TRIG_LOW) {
interrupt_mode = NXP_PINT_LOW;
} else {
return -ENOTSUP;
}
break;
case GPIO_INT_MODE_EDGE:
if (trig == GPIO_INT_TRIG_HIGH) {
interrupt_mode = NXP_PINT_RISING;
} else if (trig == GPIO_INT_TRIG_LOW) {
interrupt_mode = NXP_PINT_FALLING;
} else {
interrupt_mode = NXP_PINT_BOTH;
}
break;
default:
return -ENOTSUP;
}
/* PINT treats GPIO pins as continuous. Each port has 32 pins */
ret = nxp_pint_pin_enable((port * 32) + pin, interrupt_mode, (trig & GPIO_INT_WAKEUP));
if (ret < 0) {
return ret;
}
/* Install callback */
return nxp_pint_pin_set_callback((port * 32) + pin,
gpio_mcux_lpc_pint_cb,
(struct device *)dev);
}
#endif /* CONFIG_NXP_PINT */
#if (defined(FSL_FEATURE_GPIO_HAS_INTERRUPT) && FSL_FEATURE_GPIO_HAS_INTERRUPT)
static int gpio_mcux_lpc_module_interrupt_cfg(const struct device *dev,
gpio_pin_t pin,
enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
const struct gpio_mcux_lpc_config *config = dev->config;
gpio_interrupt_index_t int_idx;
gpio_interrupt_config_t pin_config;
if (config->int_source == INT_SOURCE_NONE) {
return -ENOTSUP;
}
/* Route interrupt to source A or B based on interrupt source */
int_idx = (config->int_source == INT_SOURCE_INTA) ?
kGPIO_InterruptA : kGPIO_InterruptB;
/* Disable interrupt if requested */
if (mode == GPIO_INT_MODE_DISABLED) {
GPIO_PinDisableInterrupt(config->gpio_base, config->port_no, pin, int_idx);
return 0;
}
/* Set pin interrupt level */
if (mode == GPIO_INT_MODE_LEVEL) {
pin_config.mode = kGPIO_PinIntEnableLevel;
} else if (mode == GPIO_INT_MODE_EDGE) {
pin_config.mode = kGPIO_PinIntEnableEdge;
} else {
return -ENOTSUP;
}
/* Set pin interrupt trigger */
if (trig == GPIO_INT_TRIG_HIGH) {
pin_config.polarity = kGPIO_PinIntEnableHighOrRise;
} else if (trig == GPIO_INT_TRIG_LOW) {
pin_config.polarity = kGPIO_PinIntEnableLowOrFall;
} else {
return -ENOTSUP;
}
/* Enable interrupt with new configuration */
GPIO_SetPinInterruptConfig(config->gpio_base, config->port_no, pin, &pin_config);
GPIO_PinEnableInterrupt(config->gpio_base, config->port_no, pin, int_idx);
return 0;
}
/* GPIO module interrupt handler */
void gpio_mcux_lpc_module_isr(const struct device *dev)
{
const struct gpio_mcux_lpc_config *config = dev->config;
struct gpio_mcux_lpc_data *data = dev->data;
uint32_t status;
status = GPIO_PortGetInterruptStatus(config->gpio_base,
config->port_no,
config->int_source == INT_SOURCE_INTA ?
kGPIO_InterruptA : kGPIO_InterruptB);
GPIO_PortClearInterruptFlags(config->gpio_base,
config->port_no,
config->int_source == INT_SOURCE_INTA ?
kGPIO_InterruptA : kGPIO_InterruptB,
status);
gpio_fire_callbacks(&data->callbacks, dev, status);
}
#endif /* FSL_FEATURE_GPIO_HAS_INTERRUPT */
static int gpio_mcux_lpc_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_lpc_config *config = dev->config;
GPIO_Type *gpio_base = config->gpio_base;
uint32_t port = config->port_no;
/* Ensure pin used as interrupt is set as input*/
if ((mode & GPIO_INT_ENABLE) &&
((gpio_base->DIR[port] & BIT(pin)) != 0)) {
return -ENOTSUP;
}
#if defined(CONFIG_NXP_PINT)
if (config->int_source == INT_SOURCE_PINT) {
return gpio_mcux_lpc_pint_interrupt_cfg(dev, pin, mode, trig);
}
#endif /* CONFIG_NXP_PINT */
#if (defined(FSL_FEATURE_GPIO_HAS_INTERRUPT) && FSL_FEATURE_GPIO_HAS_INTERRUPT)
return gpio_mcux_lpc_module_interrupt_cfg(dev, pin, mode, trig);
#else
return -ENOTSUP;
#endif
}
static int gpio_mcux_lpc_manage_cb(const struct device *port,
struct gpio_callback *callback, bool set)
{
struct gpio_mcux_lpc_data *data = port->data;
return gpio_manage_callback(&data->callbacks, callback, set);
}
static int gpio_mcux_lpc_init(const struct device *dev)
{
const struct gpio_mcux_lpc_config *config = dev->config;
GPIO_PortInit(config->gpio_base, config->port_no);
return 0;
}
static const struct gpio_driver_api gpio_mcux_lpc_driver_api = {
.pin_configure = gpio_mcux_lpc_configure,
.port_get_raw = gpio_mcux_lpc_port_get_raw,
.port_set_masked_raw = gpio_mcux_lpc_port_set_masked_raw,
.port_set_bits_raw = gpio_mcux_lpc_port_set_bits_raw,
.port_clear_bits_raw = gpio_mcux_lpc_port_clear_bits_raw,
.port_toggle_bits = gpio_mcux_lpc_port_toggle_bits,
.pin_interrupt_configure = gpio_mcux_lpc_pin_interrupt_configure,
.manage_callback = gpio_mcux_lpc_manage_cb,
};
#ifdef IOPCTL
#define PINMUX_BASE IOPCTL
#endif
#ifdef IOCON
#define PINMUX_BASE IOCON
#endif
#ifdef MCI_IO_MUX
#define PINMUX_BASE MCI_IO_MUX
#endif
#define GPIO_MCUX_LPC_MODULE_IRQ_CONNECT(inst) \
do { \
IRQ_CONNECT(DT_INST_IRQ(inst, irq), \
DT_INST_IRQ(inst, priority), \
gpio_mcux_lpc_module_isr, DEVICE_DT_INST_GET(inst), 0); \
irq_enable(DT_INST_IRQ(inst, irq)); \
} while (false)
#define GPIO_MCUX_LPC_MODULE_IRQ(inst) \
IF_ENABLED(DT_INST_IRQ_HAS_IDX(inst, 0), \
(GPIO_MCUX_LPC_MODULE_IRQ_CONNECT(inst)))
#define GPIO_MCUX_LPC(n) \
static int lpc_gpio_init_##n(const struct device *dev); \
\
static const struct gpio_mcux_lpc_config gpio_mcux_lpc_config_##n = { \
.common = { \
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n), \
}, \
.gpio_base = GPIO, \
.pinmux_base = PINMUX_BASE, \
.int_source = DT_INST_ENUM_IDX(n, int_source), \
.port_no = DT_INST_PROP(n, port) \
}; \
\
static struct gpio_mcux_lpc_data gpio_mcux_lpc_data_##n; \
\
DEVICE_DT_INST_DEFINE(n, lpc_gpio_init_##n, NULL, \
&gpio_mcux_lpc_data_##n, \
&gpio_mcux_lpc_config_##n, PRE_KERNEL_1, \
CONFIG_GPIO_INIT_PRIORITY, \
&gpio_mcux_lpc_driver_api); \
\
static int lpc_gpio_init_##n(const struct device *dev) \
{ \
gpio_mcux_lpc_init(dev); \
GPIO_MCUX_LPC_MODULE_IRQ(n); \
\
return 0; \
}
DT_INST_FOREACH_STATUS_OKAY(GPIO_MCUX_LPC)
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