1457b361b6
Split the SDL GPIO emulator driver in a top and bottom to enable using it with embedded libCs. Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 2022, Basalte bv
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#define DT_DRV_COMPAT zephyr_gpio_emul_sdl
|
|
|
|
#include <zephyr/drivers/gpio/gpio_emul.h>
|
|
#include <zephyr/kernel.h>
|
|
#include <zephyr/logging/log.h>
|
|
|
|
#include "gpio_emul_sdl_bottom.h"
|
|
|
|
LOG_MODULE_REGISTER(gpio_emul_sdl, CONFIG_GPIO_LOG_LEVEL);
|
|
|
|
struct gpio_sdl_config {
|
|
const struct device *emul;
|
|
|
|
const int *codes;
|
|
uint8_t num_codes;
|
|
struct gpio_sdl_data *data;
|
|
};
|
|
|
|
static int sdl_filter_top(struct gpio_sdl_data *bottom_data)
|
|
{
|
|
const struct device *port = bottom_data->dev;
|
|
const struct gpio_sdl_config *config = port->config;
|
|
int ret;
|
|
|
|
gpio_pin_t pin = 0;
|
|
|
|
/* Search for the corresponding scancode */
|
|
while (pin < config->num_codes) {
|
|
if (config->codes[pin] == bottom_data->event_scan_code) {
|
|
break;
|
|
}
|
|
pin++;
|
|
}
|
|
|
|
if (pin == config->num_codes) {
|
|
/* Not tracked */
|
|
return 1;
|
|
}
|
|
|
|
/* Lock the scheduler so we can't be preempted,
|
|
* as the gpio_emul driver keeps a mutex locked
|
|
* for as long as there are pending interrupts
|
|
*/
|
|
k_sched_lock();
|
|
|
|
/* Update the pin state */
|
|
ret = gpio_emul_input_set(config->emul, pin, bottom_data->key_down);
|
|
|
|
k_sched_unlock();
|
|
if (ret < 0) {
|
|
LOG_WRN("Failed to emulate input (%d)", ret);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_sdl_init(const struct device *dev)
|
|
{
|
|
const struct gpio_sdl_config *config = dev->config;
|
|
|
|
for (uint8_t pin = 0; pin < config->num_codes; ++pin) {
|
|
if (config->codes[pin] != GPIOEMULSDL_SCANCODE_UNKNOWN) {
|
|
LOG_INF("GPIO %s:%u = %u", dev->name, pin, config->codes[pin]);
|
|
}
|
|
}
|
|
|
|
config->data->dev = (void *)dev;
|
|
config->data->callback = sdl_filter_top;
|
|
gpio_sdl_init_bottom(config->data);
|
|
return 0;
|
|
}
|
|
|
|
#define GPIO_SDL_DEFINE(inst) \
|
|
BUILD_ASSERT(DT_NODE_HAS_COMPAT_STATUS(DT_INST_PARENT(inst), \
|
|
zephyr_gpio_emul, okay), \
|
|
"Enabled parent zephyr,gpio-emul node is required"); \
|
|
\
|
|
static const int gpio_sdl_##inst##_codes[] \
|
|
= DT_INST_PROP(inst, scancodes); \
|
|
\
|
|
static struct gpio_sdl_data data_##inst; \
|
|
\
|
|
static const struct gpio_sdl_config gpio_sdl_##inst##_config = { \
|
|
.emul = DEVICE_DT_GET(DT_INST_PARENT(inst)), \
|
|
.codes = gpio_sdl_##inst##_codes, \
|
|
.num_codes = DT_INST_PROP_LEN(inst, scancodes), \
|
|
.data = &data_##inst, \
|
|
}; \
|
|
\
|
|
DEVICE_DT_INST_DEFINE(inst, gpio_sdl_init, NULL, NULL, \
|
|
&gpio_sdl_##inst##_config, POST_KERNEL, \
|
|
CONFIG_GPIO_INIT_PRIORITY, NULL);
|
|
|
|
DT_INST_FOREACH_STATUS_OKAY(GPIO_SDL_DEFINE)
|