/*
 * Copyright (c) 2020-2021, Bluetrum Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author            Notes
 * 2020-11-18     greedyhao         first version
 */

#include <rthw.h>
#include "board.h"

int rt_hw_usart_init(void);
void my_printf(const char *format, ...);
void my_print_r(const void *buf, uint16_t cnt);
void timer0_cfg(uint32_t ticks);
void rt_soft_isr(int vector, void *param);
void cpu_irq_comm(void);
void set_cpu_irq_comm(void (*irq_hook)(void));
void load_cache();
void os_cache_init(void);
void sys_error_hook(uint8_t err_no);
void huart_timer_isr(void);

typedef void (*spiflash_init_func)(uint8_t sf_read, uint8_t dummy);

static struct rt_mutex mutex_spiflash = {0};
static struct rt_mutex mutex_cache = {0};
extern volatile rt_uint8_t rt_interrupt_nest;
extern uint32_t __heap_start, __heap_end;

#ifdef RT_USING_CONSOLE
void hal_printf(const char *fmt, ...)
{
    rt_device_t console = rt_console_get_device();

    va_list args;
    rt_size_t length;
    static char rt_log_buf[RT_CONSOLEBUF_SIZE];

    va_start(args, fmt);
    /* the return value of vsnprintf is the number of bytes that would be
     * written to buffer had if the size of the buffer been sufficiently
     * large excluding the terminating null byte. If the output string
     * would be larger than the rt_log_buf, we have to adjust the output
     * length. */
    length = rt_vsnprintf(rt_log_buf, sizeof(rt_log_buf) - 1, fmt, args);
    if (length > RT_CONSOLEBUF_SIZE - 1)
        length = RT_CONSOLEBUF_SIZE - 1;
#ifdef RT_USING_DEVICE
    if (console == RT_NULL)
    {
        rt_hw_console_output(rt_log_buf);
    }
    else
    {
        rt_uint16_t old_flag = console->open_flag;

        console->open_flag |= RT_DEVICE_FLAG_STREAM;
        rt_device_write(console, 0, rt_log_buf, length);
        console->open_flag = old_flag;
    }
#else
    rt_hw_console_output(rt_log_buf);
#endif
    va_end(args);
}
#endif

RT_SECTION(".irq")
void os_interrupt_enter(void)
{
    rt_interrupt_enter();
}

RT_SECTION(".irq")
void os_interrupt_leave(void)
{
    rt_interrupt_leave();
}

typedef void (*isr_t)(void);
RT_SECTION(".irq")
isr_t register_isr(int vector, isr_t isr)
{
    char buf[8] = {0};
    rt_snprintf(buf, sizeof(buf), "sys%d", vector);
    rt_isr_handler_t handle = (rt_isr_handler_t)isr;
    rt_hw_interrupt_install(vector, handle, RT_NULL, buf);
}

RT_SECTION(".irq.timer")
void timer0_isr(int vector, void *param)
{
    rt_interrupt_enter();
    TMR0CPND = BIT(9);
    rt_tick_increase();
#ifdef RT_USING_SERIAL
    huart_timer_isr();
#endif
    rt_interrupt_leave();
}

void timer0_init(void)
{
    TMR0CON =  BIT(7); //TIE
    TMR0CNT = 0;

    rt_hw_interrupt_install(IRQ_TMR0_VECTOR, timer0_isr, RT_NULL, "tick");
}

void timer0_cfg(uint32_t ticks)
{
    TMR0PR  = (uint32_t)(ticks - 1UL);       //1ms interrupt
    TMR0CON |= BIT(0); // EN
}

uint32_t hal_get_ticks(void)
{
    return rt_tick_get();
}

void hal_mdelay(uint32_t nms)
{
    rt_thread_mdelay(nms);
}

void hal_udelay(uint32_t nus)
{
    rt_hw_us_delay(nus);
}

/**
 * The time delay function.
 *
 * @param us microseconds.
 */
RT_SECTION(".com_text")
void rt_hw_us_delay(rt_uint32_t us)
{
    rt_uint32_t ticks;
    rt_uint32_t told, tnow, tcnt = 0;
    rt_uint32_t reload = TMR0PR;

    ticks = us * reload / (1000 / RT_TICK_PER_SECOND);
    told = TMR0CNT;
    while (1)
    {
        tnow = TMR0CNT;
        if (tnow != told)
        {
            if (tnow < told)
            {
                tcnt += told - tnow;
            }
            else
            {
                tcnt += reload - tnow + told;
            }
            told = tnow;
            if (tcnt >= ticks)
            {
                break;
            }
        }
    }
}

void rt_hw_systick_init(void)
{
    CLKCON2 &= 0x00ffffff;
    CLKCON2 |= (25 << 24);                                  //配置x26m_div_clk = 1M (timer, ir, fmam ...用到)
    CLKCON0 &= ~(7 << 23);
    CLKCON0 |= BIT(24);                                     //tmr_inc select x26m_div_clk = 1M

    set_sysclk(SYSCLK_48M);

    /* Setting software interrupt */
    set_cpu_irq_comm(cpu_irq_comm);
    rt_hw_interrupt_install(IRQ_SW_VECTOR, rt_soft_isr, RT_NULL, "sw_irq");

    timer0_init();
    hal_set_tick_hook(timer0_cfg);
    hal_set_ticks(get_sysclk_nhz() / RT_TICK_PER_SECOND);

    PICCON |= 0x10002;
}

void rt_hw_board_init(void)
{
    WDT_DIS();
    rt_hw_systick_init();

#ifdef RT_USING_HEAP
    rt_system_heap_init(&__heap_start, &__heap_end);
#endif

#ifdef RT_USING_PIN
    rt_hw_pin_init();
#endif // RT_USING_PIN

#ifdef RT_USING_SERIAL
    rt_hw_usart_init();
#endif // RT_USING_SERIAL

#if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif // RT_USING_CONSOLE

#ifdef RT_USING_COMPONENTS_INIT
    rt_components_board_init();
#endif
}

RT_SECTION(".irq.cache")
void cache_init(void)
{
    os_cache_init();
    rt_mutex_init(&mutex_spiflash, "flash_mutex", RT_IPC_FLAG_PRIO);
    rt_mutex_init(&mutex_cache, "cache_mutex", RT_IPC_FLAG_PRIO);
}

RT_SECTION(".irq.cache")
void os_spiflash_lock(void)
{
    if ((rt_thread_self() != RT_NULL) && (rt_interrupt_nest == 0))
    {
        rt_mutex_take(&mutex_spiflash, RT_WAITING_FOREVER);
    }
}

RT_SECTION(".irq.cache")
void os_spiflash_unlock(void)
{
    if ((rt_thread_self() != RT_NULL) && (rt_interrupt_nest == 0))
    {
        rt_mutex_release(&mutex_spiflash);
    }
}

RT_SECTION(".irq.cache")
void os_cache_lock(void)
{
    if ((rt_thread_self() != RT_NULL) && (rt_interrupt_nest == 0))
    {
        rt_mutex_take(&mutex_cache, RT_WAITING_FOREVER);
    }
}

RT_SECTION(".irq.cache")
void os_cache_unlock(void)
{
    if ((rt_thread_self() != RT_NULL) && (rt_interrupt_nest == 0))
    {
        rt_mutex_release(&mutex_cache);
    }
}

RT_SECTION(".irq.err.str")
static const char stack_info[] = "thread sp=0x%x name=%s";

void rt_hw_console_output(const char *str)
{
    my_printf(str);
}

/**
 * @brief print exception error
 * @note Every message needed to print, must put in .comm exction.
 * @note (IRQ in Flash: %x %x - %x %x\n, -, rt_interrupt_nest, PC, miss_addr)
 *       miss_addr: The address in map file minus 0x10000000
 */
RT_SECTION(".irq.err")
void exception_isr(void)
{
#if defined(RT_USING_FINSH) && defined(MSH_USING_BUILT_IN_COMMANDS)
    extern long list_thread(void);
#endif
    sys_error_hook(1);

#if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
    rt_console_set_device(RT_NULL);
    rt_kprintf(stack_info, rt_thread_self()->sp, rt_thread_self()->name);
#endif

    while (1);
}