blob: 7db42b7791385f2bda8fe1a1c024a56da915ac12 [file] [log] [blame]
/*
* Copyright (c) 2022 Microchip Technology Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT microchip_mpfs_gpio
#include <errno.h>
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/sys/util.h>
#include <zephyr/irq.h>
#include <zephyr/drivers/gpio/gpio_utils.h>
#define MSS_GPIO_INPUT_MODE 0x02
#define MSS_GPIO_OUTPUT_MODE 0x05
#define MSS_GPIO_INOUT_MODE 0x03
#define MSS_GPIO_IRQ_LEVEL_HIGH 0x00
#define MSS_GPIO_IRQ_LEVEL_LOW 0x20
#define MSS_GPIO_IRQ_EDGE_POSITIVE 0x40
#define MSS_GPIO_IRQ_EDGE_NEGATIVE 0x60
#define MSS_GPIO_IRQ_EDGE_BOTH 0x80
#define MSS_GPIO_INT_ENABLE_MASK 0x08
#define MSS_OUTPUT_BUFFER_ENABLE_MASK 0x04
struct mss_gpio_t {
uint32_t gpio_cfg[32];
uint32_t gpio_irq;
const uint32_t gpio_in;
uint32_t gpio_out;
uint32_t gpio_cfg_all;
uint32_t gpio_cfg_byte[4];
uint32_t gpio_clr_bits;
uint32_t gpio_set_bits;
};
typedef void (*mss_gpio_cfg_func_t)(void);
struct mss_gpio_config {
/* gpio_driver_config needs to be first */
struct gpio_driver_config common;
uintptr_t gpio_base_addr;
uint32_t gpio_irq_base;
mss_gpio_cfg_func_t gpio_cfg_func;
};
struct mss_gpio_data {
/* gpio_driver_data needs to be first */
struct gpio_driver_data common;
/* list of callbacks */
sys_slist_t cb;
};
/* Helper Macros for GPIO */
#define DEV_GPIO_CFG(dev) \
((const struct mss_gpio_config * const)(dev)->config)
#define DEV_GPIO(dev) \
((volatile struct mss_gpio_t *)(DEV_GPIO_CFG(dev))->gpio_base_addr)
#define DEV_GPIO_DATA(dev) \
((struct mss_gpio_data *)(dev)->data)
static int mss_gpio_config(const struct device *dev,
gpio_pin_t pin,
gpio_flags_t flags)
{
volatile struct mss_gpio_t *gpio = DEV_GPIO(dev);
uint32_t io_flags = flags & (GPIO_INPUT | GPIO_OUTPUT);
if (io_flags == GPIO_DISCONNECTED) {
return -ENOTSUP;
}
if (flags & GPIO_OUTPUT) {
gpio->gpio_cfg[pin] |= MSS_GPIO_OUTPUT_MODE;
if (flags & GPIO_OUTPUT_INIT_HIGH) {
gpio->gpio_out |= BIT(pin);
} else if (flags & GPIO_OUTPUT_INIT_LOW) {
gpio->gpio_out &= ~BIT(pin);
}
} else if (flags & GPIO_INPUT) {
gpio->gpio_cfg[pin] |= MSS_GPIO_INPUT_MODE;
} else {
return -ENOTSUP;
}
return 0;
}
static int mss_gpio_port_toggle_bits(const struct device *dev,
gpio_port_pins_t mask)
{
volatile struct mss_gpio_t *gpio = DEV_GPIO(dev);
gpio->gpio_out ^= mask;
return 0;
}
static int mss_gpio_port_get_raw(const struct device *dev,
gpio_port_value_t *value)
{
volatile struct mss_gpio_t *gpio = DEV_GPIO(dev);
*value = gpio->gpio_in;
return 0;
}
static int mss_gpio_port_set_masked_raw(const struct device *dev,
gpio_port_pins_t mask,
gpio_port_value_t value)
{
volatile struct mss_gpio_t *gpio = DEV_GPIO(dev);
gpio->gpio_out = (gpio->gpio_out & ~mask) | (value & mask);
return 0;
}
static int mss_gpio_port_set_bits_raw(const struct device *dev,
gpio_port_pins_t mask)
{
volatile struct mss_gpio_t *gpio = DEV_GPIO(dev);
gpio->gpio_out |= mask;
return 0;
}
static int mss_gpio_port_clear_bits_raw(const struct device *dev,
gpio_port_pins_t mask)
{
volatile struct mss_gpio_t *gpio = DEV_GPIO(dev);
gpio->gpio_out &= ~mask;
return 0;
}
static int mss_gpio_pin_interrupt_configure(const struct device *dev,
gpio_pin_t pin,
enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
ARG_UNUSED(trig);
volatile struct mss_gpio_t *gpio = DEV_GPIO(dev);
gpio->gpio_cfg[pin] |= (MSS_GPIO_INT_ENABLE_MASK);
switch (mode | trig) {
case GPIO_INT_EDGE_BOTH:
gpio->gpio_cfg[pin] |= (MSS_GPIO_IRQ_EDGE_BOTH);
break;
case GPIO_INT_EDGE_RISING:
gpio->gpio_cfg[pin] |= (MSS_GPIO_IRQ_EDGE_POSITIVE);
break;
case GPIO_INT_EDGE_FALLING:
gpio->gpio_cfg[pin] |= (MSS_GPIO_IRQ_EDGE_NEGATIVE);
break;
case GPIO_INT_LEVEL_LOW:
gpio->gpio_cfg[pin] |= (MSS_GPIO_IRQ_LEVEL_LOW);
break;
case GPIO_INT_LEVEL_HIGH:
gpio->gpio_cfg[pin] |= (MSS_GPIO_IRQ_LEVEL_HIGH);
break;
default:
gpio->gpio_cfg[pin] &= ~MSS_GPIO_INT_ENABLE_MASK;
break;
}
return 0;
}
static int mss_gpio_manage_callback(const struct device *dev,
struct gpio_callback *callback,
bool set)
{
struct mss_gpio_data *data = dev->data;
return gpio_manage_callback(&data->cb, callback, set);
}
static const struct gpio_driver_api mss_gpio_driver = {
.pin_configure = mss_gpio_config,
.port_toggle_bits = mss_gpio_port_toggle_bits,
.port_get_raw = mss_gpio_port_get_raw,
.port_set_masked_raw = mss_gpio_port_set_masked_raw,
.port_set_bits_raw = mss_gpio_port_set_bits_raw,
.port_clear_bits_raw = mss_gpio_port_clear_bits_raw,
.pin_interrupt_configure = mss_gpio_pin_interrupt_configure,
.manage_callback = mss_gpio_manage_callback
};
static int mss_gpio_init(const struct device *dev)
{
volatile struct mss_gpio_t *gpio = DEV_GPIO(dev);
gpio->gpio_irq = 0xFFFFFFFFU;
const struct mss_gpio_config *cfg = DEV_GPIO_CFG(dev);
/* Configure GPIO device */
cfg->gpio_cfg_func();
return 0;
}
static void mss_gpio_irq_handler(const struct device *dev)
{
volatile struct mss_gpio_t *gpio = DEV_GPIO(dev);
uint32_t interrupt_status = gpio->gpio_irq;
gpio->gpio_irq = gpio->gpio_irq;
struct mss_gpio_data *data = dev->data;
gpio_fire_callbacks(&data->cb, dev, interrupt_status);
}
#define MSS_GPIO_INIT(n) \
static struct mss_gpio_data mss_gpio_data_##n; \
static void gpio_mss_gpio_cfg_func_##n(void); \
\
static const struct mss_gpio_config mss_gpio_config_##n = { \
.common = { \
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n), \
}, \
.gpio_base_addr = DT_INST_REG_ADDR(n), \
.gpio_irq_base = DT_INST_IRQN(n), \
.gpio_cfg_func = gpio_mss_gpio_cfg_func_##n \
}; \
\
DEVICE_DT_INST_DEFINE(n, \
mss_gpio_init, \
NULL, \
&mss_gpio_data_##n, &mss_gpio_config_##n, \
PRE_KERNEL_1, CONFIG_GPIO_INIT_PRIORITY, \
&mss_gpio_driver); \
\
static void gpio_mss_gpio_cfg_func_##n(void) \
{ \
IRQ_CONNECT(DT_INST_IRQN(n), \
DT_INST_IRQ(n, priority), \
mss_gpio_irq_handler, \
DEVICE_DT_INST_GET(n), \
0); \
irq_enable(DT_INST_IRQN(n)); \
} \
DT_INST_FOREACH_STATUS_OKAY(MSS_GPIO_INIT)