/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *  http://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 <assert.h>

#include "os/mynewt.h"

#if MYNEWT_VAL(UART_0)
#include <uart/uart.h>
#include <uart_hal/uart_hal.h>
#endif

#include <hal/hal_bsp.h>
#include <hal/hal_gpio.h>
#include <hal/hal_flash_int.h>
#include <hal/hal_timer.h>

/*
 * Using SPI2 (spi1 in Mynewt parlance) because some SPI1 (spi0) pins are
 * connected to the onboard LCD.
 */
#if MYNEWT_VAL(SPI_1_MASTER) || MYNEWT_VAL(SPI_1_SLAVE)
#include <hal/hal_spi.h>
#endif

#include <stm32l152xc.h>
#include <stm32l1xx_hal_rcc.h>
#include <stm32l1xx_hal_pwr.h>
#include <stm32l1xx_hal_flash.h>
#include <stm32l1xx_hal_gpio_ex.h>
#include <mcu/stm32l1_bsp.h>
#include "mcu/stm32l1xx_mynewt_hal.h"
#include "mcu/stm32_hal.h"
#include "hal/hal_i2c.h"

#include "bsp/bsp.h"

#if MYNEWT_VAL(UART_0)
static struct uart_dev hal_uart0;

static const struct stm32_uart_cfg uart_cfg[UART_CNT] = {
    [0] = {
        .suc_uart = USART3,
        .suc_rcc_reg = &RCC->APB1ENR,
        .suc_rcc_dev = RCC_APB1ENR_USART3EN,
        .suc_pin_tx = MCU_GPIO_PORTB(10),
        .suc_pin_rx = MCU_GPIO_PORTB(11),
        .suc_pin_rts = -1,
        .suc_pin_cts = -1,
        .suc_pin_af = GPIO_AF7_USART3,
        .suc_irqn = USART3_IRQn
    }
};
#endif

#if MYNEWT_VAL(I2C_0)
static struct stm32_hal_i2c_cfg i2c_cfg0 = {
    .hic_i2c = I2C1,
    .hic_rcc_reg = &RCC->APB1ENR,
    .hic_rcc_dev = RCC_APB1ENR_I2C1EN,
    .hic_pin_sda = MCU_GPIO_PORTB(9),
    .hic_pin_scl = MCU_GPIO_PORTB(8),
    .hic_pin_af = GPIO_AF4_I2C1,
    .hic_10bit = 0,
    .hic_speed = 100000                     /* 100kHz */
};
#endif

#if MYNEWT_VAL(SPI_1_SLAVE) || MYNEWT_VAL(SPI_1_MASTER)
struct stm32_hal_spi_cfg spi1_cfg = {
    .ss_pin   = MCU_GPIO_PORTB(12),
    .sck_pin  = MCU_GPIO_PORTB(13),
    .miso_pin = MCU_GPIO_PORTB(14),
    .mosi_pin = MCU_GPIO_PORTB(15),
    .irq_prio = 2,
};
#endif

static const struct hal_bsp_mem_dump dump_cfg[] = {
    [0] = {
        .hbmd_start = &_ram_start,
        .hbmd_size = RAM_SIZE
    },
};

const struct hal_flash *
hal_bsp_flash_dev(uint8_t id)
{
    /*
     * Internal flash mapped to id 0.
     */
    if (id != 0) {
        return NULL;
    }
    return &stm32l1_flash_dev;
}

const struct hal_bsp_mem_dump *
hal_bsp_core_dump(int *area_cnt)
{
    *area_cnt = sizeof(dump_cfg) / sizeof(dump_cfg[0]);
    return dump_cfg;
}

static void
clock_config(void)
{
    RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0 };
    RCC_OscInitTypeDef RCC_OscInitStruct = { 0 };

    /* Enable HSI Oscillator and Activate PLL with HSI as source */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
    RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV3;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
        assert(0);
    }

    /* Set Voltage scale1 as MCU will run at 32MHz */
    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

    /* Poll VOSF bit of in PWR_CSR. Wait until it is reset to 0 */
    while (__HAL_PWR_GET_FLAG(PWR_FLAG_VOS) != RESET) ;

    /*
     * Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
     * clocks dividers
     */
    RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | \
                                   RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
        assert(0);
    }
}

void
hal_bsp_init(void)
{
    int rc;

    (void)rc;

    clock_config();

#if MYNEWT_VAL(UART_0)
    rc = os_dev_create((struct os_dev *) &hal_uart0, "uart0",
      OS_DEV_INIT_PRIMARY, 0, uart_hal_init, (void *)&uart_cfg[0]);
    assert(rc == 0);
#endif

#if MYNEWT_VAL(TIMER_0)
    hal_timer_init(0, TIM9);
#endif

#if MYNEWT_VAL(TIMER_1)
    hal_timer_init(1, TIM10);
#endif

#if MYNEWT_VAL(TIMER_2)
    hal_timer_init(2, TIM11);
#endif

#if MYNEWT_VAL(SPI_1_MASTER)
    rc = hal_spi_init(1, &spi1_cfg, HAL_SPI_TYPE_MASTER);
    assert(rc == 0);
#endif

#if MYNEWT_VAL(SPI_1_SLAVE)
    rc = hal_spi_init(1, &spi1_cfg, HAL_SPI_TYPE_SLAVE);
    assert(rc == 0);
#endif

#if MYNEWT_VAL(I2C_0)
    rc = hal_i2c_init(0, &i2c_cfg0);
    assert(rc == 0);
#endif
}

/**
 * Returns the configured priority for the given interrupt. If no priority
 * configured, return the priority passed in
 *
 * @param irq_num
 * @param pri
 *
 * @return uint32_t
 */
uint32_t
hal_bsp_get_nvic_priority(int irq_num, uint32_t pri)
{
    /* Add any interrupt priorities configured by the bsp here */
    return pri;
}