blob: 4fd22d30ea845ed237ebf03d36f8707c49453e5d [file] [log] [blame] [edit]
/*
* Copyright (c) 2018 Justin Watson
* Copyright (c) 2020 ATL Electronics
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT cypress_psoc6_gpio
#include <errno.h>
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/init.h>
#include <soc.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/gpio/gpio_utils.h>
#include "cy_gpio.h"
#include "cy_sysint.h"
#define LOG_LEVEL CONFIG_GPIO_LOG_LEVEL
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(gpio_psoc6);
typedef void (*config_func_t)(const struct device *dev);
struct gpio_psoc6_config {
/* gpio_driver_config needs to be first */
struct gpio_driver_config common;
GPIO_PRT_Type *regs;
config_func_t config_func;
};
struct gpio_psoc6_runtime {
/* gpio_driver_data needs to be first */
struct gpio_driver_data common;
sys_slist_t cb;
};
static int gpio_psoc6_config(const struct device *dev,
gpio_pin_t pin,
gpio_flags_t flags)
{
const struct gpio_psoc6_config * const cfg = dev->config;
GPIO_PRT_Type * const port = cfg->regs;
uint32_t drv_mode;
uint32_t pin_val;
if (flags & GPIO_OUTPUT) {
if (flags & GPIO_SINGLE_ENDED) {
drv_mode = (flags & GPIO_LINE_OPEN_DRAIN) ?
CY_GPIO_DM_OD_DRIVESLOW_IN_OFF :
CY_GPIO_DM_OD_DRIVESHIGH_IN_OFF;
pin_val = (flags & GPIO_LINE_OPEN_DRAIN) ? 1 : 0;
} else {
drv_mode = CY_GPIO_DM_STRONG_IN_OFF;
pin_val = (flags & GPIO_OUTPUT_INIT_HIGH) ? 1 : 0;
}
} else {
if ((flags & GPIO_PULL_UP) && (flags & GPIO_PULL_DOWN)) {
drv_mode = CY_GPIO_DM_PULLUP_DOWN_IN_OFF;
} else if (flags & GPIO_PULL_UP) {
drv_mode = CY_GPIO_DM_PULLUP_IN_OFF;
} else if (flags & GPIO_PULL_DOWN) {
drv_mode = CY_GPIO_DM_PULLDOWN_IN_OFF;
} else {
drv_mode = CY_GPIO_DM_ANALOG;
}
pin_val = (flags & GPIO_PULL_UP) ? 1 : 0;
}
if (flags & GPIO_INPUT) {
/* enable input buffer */
drv_mode |= CY_GPIO_DM_HIGHZ;
}
Cy_GPIO_Pin_FastInit(port, pin, drv_mode, pin_val, HSIOM_SEL_GPIO);
Cy_GPIO_SetVtrip(port, pin, CY_GPIO_VTRIP_CMOS);
Cy_GPIO_SetSlewRate(port, pin, CY_GPIO_SLEW_FAST);
Cy_GPIO_SetDriveSel(port, pin, CY_GPIO_DRIVE_FULL);
LOG_DBG("P: 0x%08x, Pin: %d, Mode: 0x%08x, Val: 0x%02x",
(unsigned int) port, pin, drv_mode, pin_val);
return 0;
}
static int gpio_psoc6_port_get_raw(const struct device *dev,
uint32_t *value)
{
const struct gpio_psoc6_config * const cfg = dev->config;
GPIO_PRT_Type * const port = cfg->regs;
*value = GPIO_PRT_IN(port);
LOG_DBG("P: 0x%08x, V: 0x%08x", (unsigned int) port, *value);
return 0;
}
static int gpio_psoc6_port_set_masked_raw(const struct device *dev,
uint32_t mask,
uint32_t value)
{
const struct gpio_psoc6_config * const cfg = dev->config;
GPIO_PRT_Type * const port = cfg->regs;
GPIO_PRT_OUT(port) = (GPIO_PRT_IN(port) & ~mask) | (mask & value);
return 0;
}
static int gpio_psoc6_port_set_bits_raw(const struct device *dev,
uint32_t mask)
{
const struct gpio_psoc6_config * const cfg = dev->config;
GPIO_PRT_Type * const port = cfg->regs;
GPIO_PRT_OUT_SET(port) = mask;
return 0;
}
static int gpio_psoc6_port_clear_bits_raw(const struct device *dev,
uint32_t mask)
{
const struct gpio_psoc6_config * const cfg = dev->config;
GPIO_PRT_Type * const port = cfg->regs;
GPIO_PRT_OUT_CLR(port) = mask;
return 0;
}
static int gpio_psoc6_port_toggle_bits(const struct device *dev,
uint32_t mask)
{
const struct gpio_psoc6_config * const cfg = dev->config;
GPIO_PRT_Type * const port = cfg->regs;
GPIO_PRT_OUT_INV(port) = mask;
return 0;
}
static int gpio_psoc6_pin_interrupt_configure(const struct device *dev,
gpio_pin_t pin,
enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
const struct gpio_psoc6_config * const cfg = dev->config;
GPIO_PRT_Type * const port = cfg->regs;
uint32_t is_enabled = ((mode == GPIO_INT_MODE_DISABLED) ? 0 : 1);
uint32_t lv_trg = CY_GPIO_INTR_DISABLE;
if (mode == GPIO_INT_MODE_LEVEL) {
return -ENOTSUP;
}
if (is_enabled) {
switch (trig) {
case GPIO_INT_TRIG_BOTH:
lv_trg = CY_GPIO_INTR_BOTH;
break;
case GPIO_INT_TRIG_HIGH:
lv_trg = CY_GPIO_INTR_RISING;
break;
case GPIO_INT_TRIG_LOW:
lv_trg = CY_GPIO_INTR_FALLING;
break;
}
}
Cy_GPIO_ClearInterrupt(port, pin);
Cy_GPIO_SetInterruptEdge(port, pin, lv_trg);
Cy_GPIO_SetInterruptMask(port, pin, is_enabled);
/**
* The driver will set 50ns glitch free filter for any interrupt.
*/
Cy_GPIO_SetFilter(port, pin);
LOG_DBG("config: Pin: %d, Trg: %d", pin, lv_trg);
return 0;
}
static void gpio_psoc6_isr(const struct device *dev)
{
const struct gpio_psoc6_config * const cfg = dev->config;
GPIO_PRT_Type * const port = cfg->regs;
struct gpio_psoc6_runtime *context = dev->data;
uint32_t int_stat;
int_stat = GPIO_PRT_INTR_MASKED(port);
/* Any INTR MMIO registers AHB clearing must be preceded with an AHB
* read access. Taken from Cy_GPIO_ClearInterrupt()
*/
(void)GPIO_PRT_INTR(port);
GPIO_PRT_INTR(port) = int_stat;
/* This read ensures that the initial write has been flushed out to HW
*/
(void)GPIO_PRT_INTR(port);
gpio_fire_callbacks(&context->cb, dev, int_stat);
}
static int gpio_psoc6_manage_callback(const struct device *port,
struct gpio_callback *callback,
bool set)
{
struct gpio_psoc6_runtime *context = port->data;
return gpio_manage_callback(&context->cb, callback, set);
}
static uint32_t gpio_psoc6_get_pending_int(const struct device *dev)
{
const struct gpio_psoc6_config * const cfg = dev->config;
GPIO_PRT_Type * const port = cfg->regs;
LOG_DBG("Pending: 0x%08x", GPIO_PRT_INTR_MASKED(port));
return GPIO_PRT_INTR_MASKED(port);
}
static const struct gpio_driver_api gpio_psoc6_api = {
.pin_configure = gpio_psoc6_config,
.port_get_raw = gpio_psoc6_port_get_raw,
.port_set_masked_raw = gpio_psoc6_port_set_masked_raw,
.port_set_bits_raw = gpio_psoc6_port_set_bits_raw,
.port_clear_bits_raw = gpio_psoc6_port_clear_bits_raw,
.port_toggle_bits = gpio_psoc6_port_toggle_bits,
.pin_interrupt_configure = gpio_psoc6_pin_interrupt_configure,
.manage_callback = gpio_psoc6_manage_callback,
.get_pending_int = gpio_psoc6_get_pending_int,
};
int gpio_psoc6_init(const struct device *dev)
{
const struct gpio_psoc6_config * const cfg = dev->config;
cfg->config_func(dev);
return 0;
}
#define GPIO_PSOC6_INIT(n) \
static void port_##n##_psoc6_config_func(const struct device *dev); \
\
static const struct gpio_psoc6_config port_##n##_psoc6_config = { \
.common = { \
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n),\
}, \
.regs = (GPIO_PRT_Type *)DT_INST_REG_ADDR(n), \
.config_func = port_##n##_psoc6_config_func, \
}; \
\
static struct gpio_psoc6_runtime port_##n##_psoc6_runtime = { 0 }; \
\
DEVICE_DT_INST_DEFINE(n, gpio_psoc6_init, NULL, \
&port_##n##_psoc6_runtime, \
&port_##n##_psoc6_config, PRE_KERNEL_1, \
CONFIG_GPIO_INIT_PRIORITY, \
&gpio_psoc6_api); \
\
static void port_##n##_psoc6_config_func(const struct device *dev) \
{ \
CY_PSOC6_DT_INST_NVIC_INSTALL(n, gpio_psoc6_isr); \
};
DT_INST_FOREACH_STATUS_OKAY(GPIO_PSOC6_INIT)