/*
 * Copyright (c) 2023 ARM Limited. All rights reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the License); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "Driver_GPIO.h"

// Pin mapping
#define GPIO_MAX_PINS           64U
#define PIN_IS_AVAILABLE(n)     ((n) < GPIO_MAX_PINS)


// Setup GPIO Interface
static int32_t GPIO_Setup (ARM_GPIO_Pin_t pin, ARM_GPIO_SignalEvent_t cb_event) {
  int32_t result = ARM_DRIVER_OK;

  if (PIN_IS_AVAILABLE(pin)) {
  } else {
    result = ARM_GPIO_ERROR_PIN;
  }

  return result;
}

// Set GPIO Direction
static int32_t GPIO_SetDirection (ARM_GPIO_Pin_t pin, ARM_GPIO_DIRECTION direction) {
  int32_t result = ARM_DRIVER_OK;

  if (PIN_IS_AVAILABLE(pin)) {
    switch (direction) {
      case ARM_GPIO_INPUT:
        break;
      case ARM_GPIO_OUTPUT:
        break;
      default:
        result = ARM_DRIVER_ERROR_PARAMETER;
        break;
    }
  } else {
    result = ARM_GPIO_ERROR_PIN;
  }

  return result;
}

// Set GPIO Output Mode
static int32_t GPIO_SetOutputMode (ARM_GPIO_Pin_t pin, ARM_GPIO_OUTPUT_MODE mode) {
  int32_t result = ARM_DRIVER_OK;

  if (PIN_IS_AVAILABLE(pin)) {
    switch (mode) {
      case ARM_GPIO_PUSH_PULL:
        break;
      case ARM_GPIO_OPEN_DRAIN:
        break;
      default:
        result = ARM_DRIVER_ERROR_PARAMETER;
        break;
    }
  } else {
    result = ARM_GPIO_ERROR_PIN;
  }

  return result;
}

// Set GPIO Pull Resistor
static int32_t GPIO_SetPullResistor (ARM_GPIO_Pin_t pin, ARM_GPIO_PULL_RESISTOR resistor) {
  int32_t result = ARM_DRIVER_OK;

  if (PIN_IS_AVAILABLE(pin)) {
    switch (resistor) {
      case ARM_GPIO_PULL_NONE:
        break;
      case ARM_GPIO_PULL_UP:
        break;
      case ARM_GPIO_PULL_DOWN:
        break;
      default:
        result = ARM_DRIVER_ERROR_PARAMETER;
        break;
    }
  } else {
    result = ARM_GPIO_ERROR_PIN;
  }

  return result;
}

// Set GPIO Event Trigger
static int32_t GPIO_SetEventTrigger (ARM_GPIO_Pin_t pin, ARM_GPIO_EVENT_TRIGGER trigger) {
  int32_t result = ARM_DRIVER_OK;

  if (PIN_IS_AVAILABLE(pin)) {
    switch (trigger) {
      case ARM_GPIO_TRIGGER_NONE:
        break;
      case ARM_GPIO_TRIGGER_RISING_EDGE:
        break;
      case ARM_GPIO_TRIGGER_FALLING_EDGE:
        break;
      case ARM_GPIO_TRIGGER_EITHER_EDGE:
        break;
      default:
        result = ARM_DRIVER_ERROR_PARAMETER;
        break;
    }
  } else {
    result = ARM_GPIO_ERROR_PIN;
  }

  return result;
}

// Set GPIO Output Level
static void GPIO_SetOutput (ARM_GPIO_Pin_t pin, uint32_t val) {

  if (PIN_IS_AVAILABLE(pin)) {
  }
}

// Get GPIO Input Level
static uint32_t GPIO_GetInput (ARM_GPIO_Pin_t pin) {
  uint32_t val = 0U;

  if (PIN_IS_AVAILABLE(pin)) {
  }
  return val;
}


// GPIO Driver access structure
ARM_DRIVER_GPIO Driver_GPIO0 = {
  GPIO_Setup,
  GPIO_SetDirection,
  GPIO_SetOutputMode,
  GPIO_SetPullResistor,
  GPIO_SetEventTrigger,
  GPIO_SetOutput,
  GPIO_GetInput
};