Ken Van Hoeylandt
72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
// SPDX-License-Identifier: Apache-2.0
|
|
#include <tactility/drivers/gpio_hog.h>
|
|
|
|
#include <tactility/device.h>
|
|
#include <tactility/driver.h>
|
|
#include <tactility/drivers/gpio_controller.h>
|
|
#include <tactility/error.h>
|
|
#include <tactility/log.h>
|
|
#include <tactility/module.h>
|
|
|
|
#define TAG "GpioHog"
|
|
#define GET_CONFIG(device) (static_cast<const GpioHogConfig*>((device)->config))
|
|
|
|
namespace {
|
|
const DeviceType GPIO_HOG_TYPE { .name = "gpio_hog" };
|
|
}
|
|
|
|
static error_t start(Device* device) {
|
|
const auto* config = GET_CONFIG(device);
|
|
|
|
gpio_flags_t flags = 0;
|
|
bool initial_high = false;
|
|
switch (config->mode) {
|
|
case GPIO_HOG_MODE_OUTPUT_HIGH:
|
|
flags = GPIO_FLAG_DIRECTION_OUTPUT;
|
|
initial_high = true;
|
|
break;
|
|
case GPIO_HOG_MODE_OUTPUT_LOW:
|
|
flags = GPIO_FLAG_DIRECTION_OUTPUT;
|
|
break;
|
|
case GPIO_HOG_MODE_INPUT:
|
|
flags = GPIO_FLAG_DIRECTION_INPUT;
|
|
break;
|
|
default:
|
|
return ERROR_RESOURCE;
|
|
}
|
|
|
|
auto* descriptor = gpio_descriptor_acquire(config->pin.gpio_controller, config->pin.pin, config->pin.flags | flags, GPIO_OWNER_HOG);
|
|
if (descriptor == nullptr) {
|
|
LOG_E(TAG, "Failed to acquire GPIO descriptor");
|
|
return ERROR_RESOURCE;
|
|
}
|
|
|
|
if (config->mode != GPIO_HOG_MODE_INPUT && gpio_descriptor_set_level(descriptor, initial_high) != ERROR_NONE) {
|
|
LOG_E(TAG, "Failed to set initial level to %d", (int)initial_high);
|
|
gpio_descriptor_release(descriptor);
|
|
return ERROR_RESOURCE;
|
|
}
|
|
|
|
device_set_driver_data(device, descriptor);
|
|
return ERROR_NONE;
|
|
}
|
|
|
|
static error_t stop(Device* device) {
|
|
auto* descriptor = static_cast<GpioDescriptor*>(device_get_driver_data(device));
|
|
gpio_descriptor_release(descriptor);
|
|
return ERROR_NONE;
|
|
}
|
|
|
|
extern Module root_module;
|
|
|
|
Driver gpio_hog_driver = {
|
|
.name = "gpio_hog",
|
|
.compatible = (const char*[]) { "gpio-hog", nullptr },
|
|
.start_device = start,
|
|
.stop_device = stop,
|
|
.api = nullptr,
|
|
.device_type = &GPIO_HOG_TYPE,
|
|
.owner = &root_module,
|
|
.internal = nullptr
|
|
};
|