blob: dfca3ce7ec9aeb9ead720742470f6e51e1f92a7c [file] [log] [blame]
/*
* Copyright (c) 2017, Christian Taedcke
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT silabs_gecko_gpio_port
#include <errno.h>
#include <drivers/gpio.h>
#include <soc.h>
#include <em_gpio.h>
#include "gpio_utils.h"
/*
* Macros to set the GPIO MODE registers
*
* See https://www.silabs.com/documents/public/reference-manuals/EFM32WG-RM.pdf
* pages 972 and 982.
*/
/**
* @brief Create the value to set the GPIO MODEL register
* @param[in] pin The index of the pin. Valid values are 0..7.
* @param[in] mode The mode that should be set.
* @return The value that can be set into the GPIO MODEL register.
*/
#define GECKO_GPIO_MODEL(pin, mode) (mode << (pin * 4))
/**
* @brief Create the value to set the GPIO MODEH register
* @param[in] pin The index of the pin. Valid values are 8..15.
* @param[in] mode The mode that should be set.
* @return The value that can be set into the GPIO MODEH register.
*/
#define GECKO_GPIO_MODEH(pin, mode) (mode << ((pin - 8) * 4))
#define member_size(type, member) sizeof(((type *)0)->member)
#define NUMBER_OF_PORTS (member_size(GPIO_TypeDef, P) / \
member_size(GPIO_TypeDef, P[0]))
struct gpio_gecko_common_config {
};
struct gpio_gecko_common_data {
/* a list of all ports */
const struct device *ports[NUMBER_OF_PORTS];
size_t count;
};
struct gpio_gecko_config {
/* gpio_driver_config needs to be first */
struct gpio_driver_config common;
GPIO_Port_TypeDef gpio_index;
};
struct gpio_gecko_data {
/* gpio_driver_data needs to be first */
struct gpio_driver_data common;
/* port ISR callback routine address */
sys_slist_t callbacks;
/* mask of pins on which interrupt is enabled */
uint32_t int_enabled_mask;
};
static inline void gpio_gecko_add_port(struct gpio_gecko_common_data *data,
const struct device *dev)
{
__ASSERT(dev, "No port device!");
data->ports[data->count++] = dev;
}
static int gpio_gecko_configure(const struct device *dev,
gpio_pin_t pin,
gpio_flags_t flags)
{
const struct gpio_gecko_config *config = dev->config;
GPIO_Port_TypeDef gpio_index = config->gpio_index;
GPIO_Mode_TypeDef mode;
unsigned int out = 0U;
if (flags & GPIO_OUTPUT) {
/* Following modes enable both output and input */
if (flags & GPIO_SINGLE_ENDED) {
if (flags & GPIO_LINE_OPEN_DRAIN) {
mode = gpioModeWiredAnd;
} else {
mode = gpioModeWiredOr;
}
} else {
mode = gpioModePushPull;
}
if (flags & GPIO_OUTPUT_INIT_HIGH) {
out = 1U;
} else if (flags & GPIO_OUTPUT_INIT_LOW) {
out = 0U;
} else {
out = GPIO_PinOutGet(gpio_index, pin);
}
} else if (flags & GPIO_INPUT) {
if (flags & GPIO_PULL_UP) {
mode = gpioModeInputPull;
out = 1U; /* pull-up*/
} else if (flags & GPIO_PULL_DOWN) {
mode = gpioModeInputPull;
/* out = 0 means pull-down*/
} else {
mode = gpioModeInput;
}
} else {
/* Neither input nor output mode is selected */
mode = gpioModeDisabled;
}
/* 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
*/
GPIO_PinModeSet(gpio_index, pin, mode, out);
return 0;
}
static int gpio_gecko_port_get_raw(const struct device *dev, uint32_t *value)
{
const struct gpio_gecko_config *config = dev->config;
GPIO_Port_TypeDef gpio_index = config->gpio_index;
*value = GPIO_PortInGet(gpio_index);
return 0;
}
static int gpio_gecko_port_set_masked_raw(const struct device *dev,
uint32_t mask,
uint32_t value)
{
const struct gpio_gecko_config *config = dev->config;
GPIO_Port_TypeDef gpio_index = config->gpio_index;
GPIO_PortOutSetVal(gpio_index, value, mask);
return 0;
}
static int gpio_gecko_port_set_bits_raw(const struct device *dev,
uint32_t mask)
{
const struct gpio_gecko_config *config = dev->config;
GPIO_Port_TypeDef gpio_index = config->gpio_index;
GPIO_PortOutSet(gpio_index, mask);
return 0;
}
static int gpio_gecko_port_clear_bits_raw(const struct device *dev,
uint32_t mask)
{
const struct gpio_gecko_config *config = dev->config;
GPIO_Port_TypeDef gpio_index = config->gpio_index;
GPIO_PortOutClear(gpio_index, mask);
return 0;
}
static int gpio_gecko_port_toggle_bits(const struct device *dev,
uint32_t mask)
{
const struct gpio_gecko_config *config = dev->config;
GPIO_Port_TypeDef gpio_index = config->gpio_index;
GPIO_PortOutToggle(gpio_index, mask);
return 0;
}
static int gpio_gecko_pin_interrupt_configure(const struct device *dev,
gpio_pin_t pin,
enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
const struct gpio_gecko_config *config = dev->config;
struct gpio_gecko_data *data = dev->data;
/* Interrupt on static level is not supported by the hardware */
if (mode == GPIO_INT_MODE_LEVEL) {
return -ENOTSUP;
}
if (mode == GPIO_INT_MODE_DISABLED) {
GPIO_IntDisable(BIT(pin));
} else {
/* Interrupt line is already in use */
if ((GPIO->IEN & BIT(pin)) != 0) {
/* TODO: Return an error only if request is done for
* a pin from a different port.
*/
return -EBUSY;
}
bool rising_edge = true;
bool falling_edge = true;
if (trig == GPIO_INT_TRIG_LOW) {
rising_edge = false;
falling_edge = true;
} else if (trig == GPIO_INT_TRIG_HIGH) {
rising_edge = true;
falling_edge = false;
} /* default is GPIO_INT_TRIG_BOTH */
GPIO_IntConfig(config->gpio_index, pin,
rising_edge, falling_edge, true);
}
WRITE_BIT(data->int_enabled_mask, pin, mode != GPIO_INT_DISABLE);
return 0;
}
static int gpio_gecko_manage_callback(const struct device *dev,
struct gpio_callback *callback, bool set)
{
struct gpio_gecko_data *data = dev->data;
return gpio_manage_callback(&data->callbacks, callback, set);
}
/**
* Handler for both odd and even pin interrupts
*/
static void gpio_gecko_common_isr(const struct device *dev)
{
struct gpio_gecko_common_data *data = dev->data;
uint32_t enabled_int, int_status;
const struct device *port_dev;
struct gpio_gecko_data *port_data;
int_status = GPIO->IF;
for (unsigned int i = 0; int_status && (i < data->count); i++) {
port_dev = data->ports[i];
port_data = port_dev->data;
enabled_int = int_status & port_data->int_enabled_mask;
if (enabled_int != 0) {
int_status &= ~enabled_int;
#if defined(_SILICON_LABS_32B_SERIES_2)
GPIO->IF_CLR = enabled_int;
#else
GPIO->IFC = enabled_int;
#endif
gpio_fire_callbacks(&port_data->callbacks, port_dev,
enabled_int);
}
}
}
static const struct gpio_driver_api gpio_gecko_driver_api = {
.pin_configure = gpio_gecko_configure,
.port_get_raw = gpio_gecko_port_get_raw,
.port_set_masked_raw = gpio_gecko_port_set_masked_raw,
.port_set_bits_raw = gpio_gecko_port_set_bits_raw,
.port_clear_bits_raw = gpio_gecko_port_clear_bits_raw,
.port_toggle_bits = gpio_gecko_port_toggle_bits,
.pin_interrupt_configure = gpio_gecko_pin_interrupt_configure,
.manage_callback = gpio_gecko_manage_callback,
};
static const struct gpio_driver_api gpio_gecko_common_driver_api = {
.manage_callback = gpio_gecko_manage_callback,
};
static int gpio_gecko_common_init(const struct device *dev);
static const struct gpio_gecko_common_config gpio_gecko_common_config = {
};
static struct gpio_gecko_common_data gpio_gecko_common_data;
DEVICE_DT_DEFINE(DT_INST(0, silabs_gecko_gpio),
gpio_gecko_common_init,
NULL,
&gpio_gecko_common_data, &gpio_gecko_common_config,
POST_KERNEL, CONFIG_GPIO_GECKO_COMMON_INIT_PRIORITY,
&gpio_gecko_common_driver_api);
static int gpio_gecko_common_init(const struct device *dev)
{
gpio_gecko_common_data.count = 0;
IRQ_CONNECT(GPIO_EVEN_IRQn,
DT_IRQ_BY_NAME(DT_INST(0, silabs_gecko_gpio), gpio_even, priority),
gpio_gecko_common_isr,
DEVICE_DT_GET(DT_INST(0, silabs_gecko_gpio)), 0);
IRQ_CONNECT(GPIO_ODD_IRQn,
DT_IRQ_BY_NAME(DT_INST(0, silabs_gecko_gpio), gpio_odd, priority),
gpio_gecko_common_isr,
DEVICE_DT_GET(DT_INST(0, silabs_gecko_gpio)), 0);
irq_enable(GPIO_EVEN_IRQn);
irq_enable(GPIO_ODD_IRQn);
return 0;
}
#define GPIO_PORT_INIT(idx) \
static int gpio_gecko_port##idx##_init(const struct device *dev); \
\
static const struct gpio_gecko_config gpio_gecko_port##idx##_config = { \
.common = { \
.port_pin_mask = (gpio_port_pins_t)(-1), \
}, \
.gpio_index = DT_INST_PROP(idx, peripheral_id), \
}; \
\
static struct gpio_gecko_data gpio_gecko_port##idx##_data; \
\
DEVICE_DT_INST_DEFINE(idx, \
gpio_gecko_port##idx##_init, \
NULL, \
&gpio_gecko_port##idx##_data, \
&gpio_gecko_port##idx##_config, \
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT, \
&gpio_gecko_driver_api); \
\
static int gpio_gecko_port##idx##_init(const struct device *dev) \
{ \
gpio_gecko_add_port(&gpio_gecko_common_data, dev); \
return 0; \
}
DT_INST_FOREACH_STATUS_OKAY(GPIO_PORT_INIT)