path: root/bsp/hpmicro/libraries/drivers/drv_uart_v2.c

/*
 * Copyright (c) 2022-2024 HPMicro
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Change Logs:
 * Date         Author      Notes
 * 2022-03-08   HPMicro     First version
 * 2022-07-28   HPMicro     Fix compiling warning if RT_SERIAL_USING_DMA was not defined
 * 2022-08-08   HPMicro     Integrate DMA Manager and support dynamic DMA resource assignment'
 * 2023-03-07   HPMicro     Fix the issue that the data_width was not initialized before setup dma handshake
 * 2024-06-10   HPMicro     Fix memory leakage issue
 *
 */
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include "drv_uart_v2.h"
#include "hpm_uart_drv.h"
#include "hpm_sysctl_drv.h"
#include "hpm_l1c_drv.h"
#include "hpm_dma_mgr.h"
#include "hpm_soc.h"

#include "hpm_clock_drv.h"

#ifdef RT_USING_SERIAL_V2

#ifdef RT_SERIAL_USING_DMA
#define BOARD_UART_DMAMUX  HPM_DMAMUX
#define UART_DMA_TRIGGER_LEVEL (1U)

typedef struct dma_channel {
    struct rt_serial_device *serial;
    dma_resource_t resource;
    void (*tranfer_done)(struct rt_serial_device *serial);
    void (*tranfer_abort)(struct rt_serial_device *serial);
    void (*tranfer_error)(struct rt_serial_device *serial);
    void *ringbuf_ptr;
} hpm_dma_channel_handle_t;

//static struct dma_channel dma_channels[DMA_SOC_CHANNEL_NUM];
static int hpm_uart_dma_config(struct rt_serial_device *serial, void *arg);
static void hpm_uart_receive_dma_next(struct rt_serial_device *serial);
#endif

#define UART_ROOT_CLK_FREQ BOARD_APP_UART_SRC_FREQ

struct hpm_uart {
    UART_Type *uart_base;
    rt_uint32_t irq_num;
    rt_uint8_t irq_priority;
    clock_name_t clk_name;
    struct rt_serial_device *serial;
    char *device_name;
#ifdef RT_SERIAL_USING_DMA
    uint32_t tx_dma_mux;
    uint32_t rx_dma_mux;
    uint32_t dma_flags;
    hpm_dma_channel_handle_t tx_chn_ctx;
    hpm_dma_channel_handle_t rx_chn_ctx;
    bool tx_resource_allocated;
    bool rx_resource_allocated;
#if defined(HPM_IP_FEATURE_UART_RX_IDLE_DETECT) && (HPM_IP_FEATURE_UART_RX_IDLE_DETECT == 1) && defined(RT_SERIAL_USING_DMA)
    ATTR_ALIGN(HPM_L1C_CACHELINE_SIZE) uint8_t rx_idle_tmp_buffer[1024];
#endif
#endif
};


extern void init_uart_pins(UART_Type *ptr);
static void hpm_uart_isr(struct rt_serial_device *serial);
static rt_err_t hpm_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg);
static rt_err_t hpm_uart_control(struct rt_serial_device *serial, int cmd, void *arg);
static int hpm_uart_putc(struct rt_serial_device *serial, char ch);
static int hpm_uart_getc(struct rt_serial_device *serial);

#ifdef RT_SERIAL_USING_DMA
int hpm_uart_dma_register_channel(struct rt_serial_device *serial,
                                                 bool is_tx,
                                                     void (*done)(struct rt_serial_device *serial),
                                                     void (*abort)(struct rt_serial_device *serial),
                                                     void (*error)(struct rt_serial_device *serial))
{

    struct hpm_uart *uart = (struct hpm_uart *)serial->parent.user_data;

    if (is_tx) {
        uart->tx_chn_ctx.serial = serial;
        uart->tx_chn_ctx.tranfer_done = done;
        uart->tx_chn_ctx.tranfer_abort = abort;
        uart->tx_chn_ctx.tranfer_error = error;
    } else {
        uart->rx_chn_ctx.serial = serial;
        uart->rx_chn_ctx.tranfer_done = done;
        uart->rx_chn_ctx.tranfer_abort = abort;
        uart->rx_chn_ctx.tranfer_error = error;
    }
    return RT_EOK;
}
#endif /* RT_SERIAL_USING_DMA */

#if defined(BSP_USING_UART0)
struct rt_serial_device serial0;
SDK_DECLARE_EXT_ISR_M(IRQn_UART0,uart0_isr)
void uart0_isr(void)
{
    hpm_uart_isr(&serial0);
}
#endif


#if defined(BSP_USING_UART1)
struct rt_serial_device serial1;
SDK_DECLARE_EXT_ISR_M(IRQn_UART1,uart1_isr)
void uart1_isr(void)
{
    hpm_uart_isr(&serial1);
}
#endif


#if defined(BSP_USING_UART2)
struct rt_serial_device serial2;
SDK_DECLARE_EXT_ISR_M(IRQn_UART2,uart2_isr)
void uart2_isr(void)
{
    hpm_uart_isr(&serial2);
}
#endif


#if defined(BSP_USING_UART3)
struct rt_serial_device serial3;
SDK_DECLARE_EXT_ISR_M(IRQn_UART3,uart3_isr)
void uart3_isr(void)
{
    hpm_uart_isr(&serial3);
}
#endif


#if defined(BSP_USING_UART4)
struct rt_serial_device serial4;
SDK_DECLARE_EXT_ISR_M(IRQn_UART4,uart4_isr)
void uart4_isr(void)
{
    hpm_uart_isr(&serial4);
}
#endif


#if defined(BSP_USING_UART5)
struct rt_serial_device serial5;
SDK_DECLARE_EXT_ISR_M(IRQn_UART5,uart5_isr)
void uart5_isr(void)
{
    hpm_uart_isr(&serial5);
}
#endif


#if defined(BSP_USING_UART6)
struct rt_serial_device serial6;
SDK_DECLARE_EXT_ISR_M(IRQn_UART6,uart6_isr)
void uart6_isr(void)
{
    hpm_uart_isr(&serial6);
}
#endif


#if defined(BSP_USING_UART7)
struct rt_serial_device serial7;
SDK_DECLARE_EXT_ISR_M(IRQn_UART7,uart7_isr)
void uart7_isr(void)
{
    hpm_uart_isr(&serial7);
}
#endif


#if defined(BSP_USING_UART8)
struct rt_serial_device serial8;
SDK_DECLARE_EXT_ISR_M(IRQn_UART8,uart8_isr)
void uart8_isr(void)
{
    hpm_uart_isr(&serial8);
}
#endif


#if defined(BSP_USING_UART9)
struct rt_serial_device serial9;
SDK_DECLARE_EXT_ISR_M(IRQn_UART9,uart9_isr)
void uart9_isr(void)
{
    hpm_uart_isr(&serial9);
}
#endif


#if defined(BSP_USING_UART10)
struct rt_serial_device serial10;
SDK_DECLARE_EXT_ISR_M(IRQn_UART10,uart10_isr)
void uart10_isr(void)
{
    hpm_uart_isr(&serial10);
}
#endif

#if defined(BSP_USING_UART11)
struct rt_serial_device serial11;
SDK_DECLARE_EXT_ISR_M(IRQn_UART11,uart11_isr)
void uart11_isr(void)
{
    hpm_uart_isr(&serial11);
}
#endif

#if defined(BSP_USING_UART12)
struct rt_serial_device serial12;
SDK_DECLARE_EXT_ISR_M(IRQn_UART12,uart12_isr)
void uart12_isr(void)
{
    hpm_uart_isr(&serial12);
}
#endif

#if defined(BSP_USING_UART13)
struct rt_serial_device serial13;
SDK_DECLARE_EXT_ISR_M(IRQn_UART13,uart13_isr)
void uart13_isr(void)
{
    hpm_uart_isr(&serial13);
}
#endif

#if defined(BSP_USING_UART14)
struct rt_serial_device serial14;
SDK_DECLARE_EXT_ISR_M(IRQn_UART14,uart14_isr)
void uart14_isr(void)
{
    hpm_uart_isr(&serial14);
}
#endif

#if defined(BSP_USING_UART15)
struct rt_serial_device serial15;
SDK_DECLARE_EXT_ISR_M(IRQn_UART15,uart15_isr)
void uart15_isr(void)
{
    hpm_uart_isr(&serial15);
}
#endif

static struct hpm_uart uarts[] =
{
#if defined(BSP_USING_UART0)
{
    HPM_UART0,
    IRQn_UART0,
#if defined(BSP_UART0_IRQ_PRIORITY)
    .irq_priority = BSP_UART0_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart0,
    &serial0,
    "uart0",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART0_TX,
    HPM_DMA_SRC_UART0_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART1)
{
    HPM_UART1,
    IRQn_UART1,
#if defined(BSP_UART1_IRQ_PRIORITY)
    .irq_priority = BSP_UART1_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart1,
    &serial1,
    "uart1",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART1_TX,
    HPM_DMA_SRC_UART1_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART2)
{
    HPM_UART2,
    IRQn_UART2,
#if defined(BSP_UART2_IRQ_PRIORITY)
    .irq_priority = BSP_UART2_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart2,
    &serial2,
    "uart2",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART2_TX,
    HPM_DMA_SRC_UART2_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART3)
{
    HPM_UART3,
    IRQn_UART3,
#if defined(BSP_UART3_IRQ_PRIORITY)
    .irq_priority = BSP_UART3_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart3,
    &serial3,
    "uart3",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART3_TX,
    HPM_DMA_SRC_UART3_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART4)
{
    HPM_UART4,
    IRQn_UART4,
#if defined(BSP_UART4_IRQ_PRIORITY)
    .irq_priority = BSP_UART4_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart4,
    &serial4,
    "uart4",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART4_TX,
    HPM_DMA_SRC_UART4_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART5)
{
    HPM_UART5,
    IRQn_UART5,
#if defined(BSP_UART5_IRQ_PRIORITY)
    .irq_priority = BSP_UART5_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart5,
    &serial5,
    "uart5",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART5_TX,
    HPM_DMA_SRC_UART5_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART6)
{
    HPM_UART6,
    IRQn_UART6,
#if defined(BSP_UART6_IRQ_PRIORITY)
    .irq_priority = BSP_UART6_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart6,
    &serial6,
    "uart6",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART6_TX,
    HPM_DMA_SRC_UART6_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART7)
{
    HPM_UART7,
    IRQn_UART7,
#if defined(BSP_UART7_IRQ_PRIORITY)
    .irq_priority = BSP_UART7_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart7,
    &serial7,
    "uart7",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART7_TX,
    HPM_DMA_SRC_UART7_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART8)
{
    HPM_UART8,
    IRQn_UART8,
#if defined(BSP_UART8_IRQ_PRIORITY)
    .irq_priority = BSP_UART8_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart8,
    &serial8,
    "uart8",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART8_TX,
    HPM_DMA_SRC_UART8_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART9)
{
    HPM_UART9,
    IRQn_UART9,
#if defined(BSP_UART9_IRQ_PRIORITY)
    .irq_priority = BSP_UART9_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart9,
    &serial9,
    "uart9",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART9_TX,
    HPM_DMA_SRC_UART9_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART10)
{
    HPM_UART10,
    IRQn_UART10,
#if defined(BSP_UART10_IRQ_PRIORITY)
    .irq_priority = BSP_UART10_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart10,
    &serial10,
    "uart10",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART10_TX,
    HPM_DMA_SRC_UART10_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART11)
{
    HPM_UART11,
    IRQn_UART11,
#if defined(BSP_UART11_IRQ_PRIORITY)
    .irq_priority = BSP_UART11_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart11,
    &serial11,
    "uart11",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART11_TX,
    HPM_DMA_SRC_UART11_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART12)
{
    HPM_UART12,
    IRQn_UART12,
#if defined(BSP_UART12_IRQ_PRIORITY)
    .irq_priority = BSP_UART12_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart12,
    &serial12,
    "uart12",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART12_TX,
    HPM_DMA_SRC_UART12_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART13)
{
    HPM_UART13,
    IRQn_UART13,
#if defined(BSP_UART13_IRQ_PRIORITY)
    .irq_priority = BSP_UART13_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart13,
    &serial13,
    "uart13",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART13_TX,
    HPM_DMA_SRC_UART13_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART14)
{
    HPM_UART14,
    IRQn_UART14,
#if defined(BSP_UART14_IRQ_PRIORITY)
    .irq_priority = BSP_UART14_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart14,
    &serial14,
    "uart14",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART14_TX,
    HPM_DMA_SRC_UART14_RX,
    0,
#endif
},
#endif

#if defined(BSP_USING_UART15)
{
    HPM_UART15,
    IRQn_UART15,
#if defined(BSP_UART15_IRQ_PRIORITY)
    .irq_priority = BSP_UART15_IRQ_PRIORITY,
#else
    .irq_priority = 1,
#endif
    clock_uart15,
    &serial15,
    "uart15",
#ifdef RT_SERIAL_USING_DMA
    HPM_DMA_SRC_UART15_TX,
    HPM_DMA_SRC_UART15_RX,
    0,
#endif
},
#endif

};

enum
{
#if defined(BSP_USING_UART0)
    HPM_UART0_INDEX,
#endif

#if defined(BSP_USING_UART1)
    HPM_UART1_INDEX,
#endif

#if defined(BSP_USING_UART2)
    HPM_UART2_INDEX,
#endif

#if defined(BSP_USING_UART3)
    HPM_UART3_INDEX,
#endif

#if defined(BSP_USING_UART4)
    HPM_UART4_INDEX,
#endif

#if defined(BSP_USING_UART5)
    HPM_UART5_INDEX,
#endif

#if defined(BSP_USING_UART6)
    HPM_UART6_INDEX,
#endif

#if defined(BSP_USING_UART7)
    HPM_UART7_INDEX,
#endif

#if defined(BSP_USING_UART8)
    HPM_UART8_INDEX,
#endif

#if defined(BSP_USING_UART9)
    HPM_UART9_INDEX,
#endif

#if defined(BSP_USING_UART10)
    HPM_UART10_INDEX,
#endif

#if defined(BSP_USING_UART11)
    HPM_UART11_INDEX,
#endif

#if defined(BSP_USING_UART12)
    HPM_UART12_INDEX,
#endif

#if defined(BSP_USING_UART13)
    HPM_UART13_INDEX,
#endif

#if defined(BSP_USING_UART14)
    HPM_UART14_INDEX,
#endif

#if defined(BSP_USING_UART15)
    HPM_UART15_INDEX,
#endif
};

#if defined(RT_SERIAL_USING_DMA)

static void uart_dma_tc_callback(DMA_Type *base, uint32_t channel, void *user_data)
{
    hpm_dma_channel_handle_t *dma_handle = (hpm_dma_channel_handle_t*)user_data;
    if ((dma_handle->resource.base != base) || (dma_handle->resource.channel != channel))
    {
        return;
    }
    dma_handle->tranfer_done(dma_handle->serial);
}

static void uart_dma_abort_callback(DMA_Type *base, uint32_t channel, void *user_data)
{
    hpm_dma_channel_handle_t *dma_handle = (hpm_dma_channel_handle_t*)user_data;
    if ((dma_handle->resource.base != base) || (dma_handle->resource.channel != channel))
    {
        return;
    }
    dma_handle->tranfer_abort(dma_handle->serial);
}

static void uart_dma_error_callback(DMA_Type *base, uint32_t channel, void *user_data)
{
    hpm_dma_channel_handle_t *dma_handle = (hpm_dma_channel_handle_t*)user_data;
    if ((dma_handle->resource.base != base) || (dma_handle->resource.channel != channel))
    {
        return;
    }
    dma_handle->tranfer_error(dma_handle->serial);
}

static void uart_tx_done(struct rt_serial_device *serial)
{
    rt_hw_serial_isr(serial, RT_SERIAL_EVENT_TX_DMADONE);
}

static void uart_rx_done(struct rt_serial_device *serial)
{
    struct rt_serial_rx_fifo *rx_fifo;
    rx_fifo = (struct rt_serial_rx_fifo *)serial->serial_rx;
 #if defined(HPM_IP_FEATURE_UART_RX_IDLE_DETECT) && (HPM_IP_FEATURE_UART_RX_IDLE_DETECT == 1) && defined(RT_SERIAL_USING_DMA)
    uint32_t uart_recv_data_count = 0;
    struct hpm_uart *uart = (struct hpm_uart *)serial->parent.user_data;
    uint32_t rx_idle_tmp_buffer_size = sizeof(uart->rx_idle_tmp_buffer);
    uart_recv_data_count = rx_idle_tmp_buffer_size - dma_get_remaining_transfer_size(uart->rx_chn_ctx.resource.base, uart->rx_chn_ctx.resource.channel);
    if (l1c_dc_is_enabled()) {
            uint32_t aligned_start = HPM_L1C_CACHELINE_ALIGN_DOWN((uint32_t)uart->rx_idle_tmp_buffer);
            uint32_t aligned_end = HPM_L1C_CACHELINE_ALIGN_UP((uint32_t)uart->rx_idle_tmp_buffer + rx_idle_tmp_buffer_size);
            uint32_t aligned_size = aligned_end - aligned_start;
            l1c_dc_invalidate(aligned_start, aligned_size);
    }
    /* if open uart again after closing uart, an idle interrupt may be triggered, but uart initialization is not performed at this time, and the program exits if the rxfifo is empty. */
    if (rx_fifo == RT_NULL) {
        return;
    }
    rt_ringbuffer_put(&(rx_fifo->rb), uart->rx_idle_tmp_buffer, uart_recv_data_count);
    rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_DMADONE);
#else
    if (l1c_dc_is_enabled()) {
        uint32_t aligned_start = HPM_L1C_CACHELINE_ALIGN_DOWN((uint32_t)rx_fifo->rb.buffer_ptr);
        uint32_t aligned_end = HPM_L1C_CACHELINE_ALIGN_UP((uint32_t)rx_fifo->rb.buffer_ptr + serial->config.rx_bufsz);
        uint32_t aligned_size = aligned_end - aligned_start;
        l1c_dc_invalidate(aligned_start, aligned_size);
    }
    rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_DMADONE | (serial->config.rx_bufsz << 8));
#endif
    /* prepare for next read */
    hpm_uart_receive_dma_next(serial);
}
#endif /* RT_SERIAL_USING_DMA */

/**
 * @brief UART common interrupt process. This
 *
 * @param serial Serial device
 */
static void hpm_uart_isr(struct rt_serial_device *serial)
{
    struct hpm_uart *uart;
    rt_uint32_t stat, enabled_irq;
    rt_uint8_t irq_id;
    rt_uint8_t count = 0;
    rt_uint8_t put_char = 0;

    RT_ASSERT(serial != RT_NULL);

    uart = (struct hpm_uart *)serial->parent.user_data;
    RT_ASSERT(uart != RT_NULL);

    struct rt_serial_rx_fifo *rx_fifo;
    rx_fifo = (struct rt_serial_rx_fifo *) serial->serial_rx;
    stat = uart_get_status(uart->uart_base);
    irq_id = uart_get_irq_id(uart->uart_base);

    if (irq_id == uart_intr_id_rx_data_avail) {
        while (uart_check_status(uart->uart_base, uart_stat_data_ready)) {
            count++;
            put_char = uart_read_byte(uart->uart_base);
            rt_ringbuffer_putchar(&(rx_fifo->rb), put_char);
            /*in order to ensure rx fifo there are remaining bytes*/
            if (count > 12) {
                break;
            }
        }
    }

    if (irq_id == uart_intr_id_rx_timeout) {
        while ((uart_check_status(uart->uart_base, uart_stat_data_ready)) || (uart_check_status(uart->uart_base, uart_stat_overrun_error))) {
            put_char= uart_read_byte(uart->uart_base);
            rt_ringbuffer_putchar(&(rx_fifo->rb), put_char);
        }
        rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
    }

    if ((irq_id & uart_intr_tx_slot_avail) && (stat & uart_stat_tx_slot_avail)) {
        /* UART in mode Transmitter */
        struct rt_serial_tx_fifo *tx_fifo;
        tx_fifo = (struct rt_serial_tx_fifo *) serial->serial_tx;
        RT_ASSERT(tx_fifo != RT_NULL);
        rt_uint8_t put_char = 0;
        uint32_t fifo_size = 0, ringbuffer_data_len = 0, tx_size = 0;
        uart_disable_irq(uart->uart_base, uart_intr_tx_slot_avail);
        fifo_size = uart_get_fifo_size(uart->uart_base);
        ringbuffer_data_len = rt_ringbuffer_data_len(&tx_fifo->rb);
        if (ringbuffer_data_len <= 0) {
            rt_hw_serial_isr(serial, RT_SERIAL_EVENT_TX_DONE);
        } else {
            tx_size = (ringbuffer_data_len > fifo_size) ? fifo_size : ringbuffer_data_len;
            for (uint32_t i = 0; i < tx_size; i++) {
                rt_ringbuffer_getchar(&tx_fifo->rb, &put_char);
                uart_write_byte(uart->uart_base, put_char);
            }
            uart_enable_irq(uart->uart_base, uart_intr_tx_slot_avail);
        }
    }
 #if defined(HPM_IP_FEATURE_UART_RX_IDLE_DETECT) && (HPM_IP_FEATURE_UART_RX_IDLE_DETECT == 1) && defined(RT_SERIAL_USING_DMA)
    if (uart_is_rxline_idle(uart->uart_base)) {
        if ((uart->rx_chn_ctx.resource.base != RT_NULL) && (dma_get_remaining_transfer_size(uart->rx_chn_ctx.resource.base, uart->rx_chn_ctx.resource.channel) > 0)) {
            /* if the rxline is idle, but the dma transfer is not finished, it means that the rxline idle interrupt is triggered before the dma transfer is finished */
            uart_rx_done(serial);
        }
        uart_clear_rxline_idle_flag(uart->uart_base);
        uart_flush(uart->uart_base);
    }
#endif
}


static rt_err_t hpm_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{

    RT_ASSERT(serial != RT_NULL);
    RT_ASSERT(cfg != RT_NULL);

    uart_config_t uart_config;
    struct hpm_uart *uart  = (struct hpm_uart *)serial->parent.user_data;

    init_uart_pins(uart->uart_base);
    uart_default_config(uart->uart_base, &uart_config);
    clock_add_to_group(uart->clk_name, BOARD_RUNNING_CORE & 0x1);
    uart_config.src_freq_in_hz = clock_get_frequency(uart->clk_name);
    uart_config.baudrate = cfg->baud_rate;
    uart_config.num_of_stop_bits = cfg->stop_bits;
    uart_config.parity = cfg->parity;
    uart_config.rx_fifo_level = uart_rx_fifo_trg_gt_three_quarters;
#ifdef RT_SERIAL_USING_DMA
    if (uart->dma_flags & (RT_DEVICE_FLAG_DMA_TX | RT_DEVICE_FLAG_DMA_RX)) {
        uart_config.fifo_enable = true;
        uart_config.dma_enable = true;
        if (uart->dma_flags & RT_DEVICE_FLAG_DMA_TX) {
            uart_config.tx_fifo_level = uart_tx_fifo_trg_not_full;
        }
        if (uart->dma_flags & RT_DEVICE_FLAG_DMA_RX) {
            uart_config.rx_fifo_level = uart_rx_fifo_trg_not_empty;
        }
#if defined(HPM_IP_FEATURE_UART_RX_IDLE_DETECT) && (HPM_IP_FEATURE_UART_RX_IDLE_DETECT == 1)
        uart_config.rxidle_config.detect_enable = true;
        uart_config.rxidle_config.detect_irq_enable = true;
        uart_config.rxidle_config.idle_cond = uart_rxline_idle_cond_rxline_logic_one;
        uart_config.rxidle_config.threshold = 16U; /* 10bit */
#endif
    }

#endif

    uart_config.word_length = cfg->data_bits - DATA_BITS_5;
    hpm_stat_t status = uart_init(uart->uart_base, &uart_config);
    return (status != status_success) ? -RT_ERROR : RT_EOK;
}

#ifdef RT_SERIAL_USING_DMA

hpm_stat_t hpm_uart_dma_rx_init(struct hpm_uart *uart_ctx)
{
    hpm_stat_t status = status_fail;
    if (!uart_ctx->rx_resource_allocated)
    {
        status = dma_mgr_request_resource(&uart_ctx->rx_chn_ctx.resource);
        if (status == status_success)
        {
            uart_ctx->dma_flags |= RT_DEVICE_FLAG_DMA_RX;
            uart_ctx->rx_resource_allocated = true;
            dma_mgr_install_chn_tc_callback(&uart_ctx->rx_chn_ctx.resource, uart_dma_tc_callback, &uart_ctx->rx_chn_ctx);
            dma_mgr_install_chn_abort_callback(&uart_ctx->rx_chn_ctx.resource, uart_dma_abort_callback, &uart_ctx->rx_chn_ctx);
            dma_mgr_install_chn_error_callback(&uart_ctx->rx_chn_ctx.resource, uart_dma_error_callback, &uart_ctx->rx_chn_ctx);
        }
    }
    return status;
}

hpm_stat_t hpm_uart_dma_tx_init(struct hpm_uart *uart_ctx)
{
    hpm_stat_t status = status_fail;
    if (!uart_ctx->tx_resource_allocated)
    {
        status = dma_mgr_request_resource(&uart_ctx->tx_chn_ctx.resource);
        if (status == status_success)
        {
            uart_ctx->dma_flags |= RT_DEVICE_FLAG_DMA_TX;
            uart_ctx->tx_resource_allocated = true;
            dma_mgr_install_chn_tc_callback(&uart_ctx->tx_chn_ctx.resource, uart_dma_tc_callback, &uart_ctx->tx_chn_ctx);
            dma_mgr_install_chn_abort_callback(&uart_ctx->tx_chn_ctx.resource, uart_dma_abort_callback, &uart_ctx->tx_chn_ctx);
            dma_mgr_install_chn_error_callback(&uart_ctx->tx_chn_ctx.resource, uart_dma_error_callback, &uart_ctx->tx_chn_ctx);
        }
    }
    return status;
}

static int hpm_uart_dma_config(struct rt_serial_device *serial, void *arg)
{
    rt_ubase_t ctrl_arg = (rt_ubase_t) arg;
    struct hpm_uart *uart = (struct hpm_uart *)serial->parent.user_data;
    struct rt_serial_rx_fifo *rx_fifo;
    dma_mgr_chn_conf_t chg_config;
    dma_mgr_get_default_chn_config(&chg_config);
    if (ctrl_arg == RT_DEVICE_FLAG_DMA_RX) {
        rx_fifo = (struct rt_serial_rx_fifo *)serial->serial_rx;
        chg_config.dst_addr_ctrl = DMA_MGR_ADDRESS_CONTROL_INCREMENT;
        chg_config.dst_mode = DMA_MGR_HANDSHAKE_MODE_NORMAL;
        chg_config.dst_width = DMA_TRANSFER_WIDTH_BYTE;
        chg_config.en_dmamux = true;
        chg_config.dmamux_src = uart->rx_dma_mux;
        chg_config.src_addr = (uint32_t)&(uart->uart_base->RBR);
        chg_config.src_addr_ctrl = DMA_MGR_ADDRESS_CONTROL_FIXED;
        chg_config.src_mode = DMA_HANDSHAKE_MODE_HANDSHAKE;
        chg_config.src_width = DMA_TRANSFER_WIDTH_BYTE;

#if defined(HPM_IP_FEATURE_UART_RX_IDLE_DETECT) && (HPM_IP_FEATURE_UART_RX_IDLE_DETECT == 1)
        chg_config.dst_addr = (uint32_t)uart->rx_idle_tmp_buffer;
        chg_config.size_in_byte = sizeof(uart->rx_idle_tmp_buffer);
#else
        chg_config.dst_addr = (uint32_t)rx_fifo->rb.buffer_ptr;
        chg_config.size_in_byte = serial->config.rx_bufsz;
#endif
        if (status_success != dma_mgr_setup_channel(&uart->rx_chn_ctx.resource, &chg_config)) {
            return -RT_ERROR;
        }
        dma_mgr_enable_channel(&uart->rx_chn_ctx.resource);
        dma_mgr_enable_chn_irq(&uart->rx_chn_ctx.resource, DMA_MGR_INTERRUPT_MASK_TC);
        dma_mgr_enable_dma_irq_with_priority(&uart->rx_chn_ctx.resource, 1);
        hpm_uart_dma_register_channel(serial, false, uart_rx_done, RT_NULL, RT_NULL);
#if defined(HPM_IP_FEATURE_UART_RX_IDLE_DETECT) && (HPM_IP_FEATURE_UART_RX_IDLE_DETECT == 1)
        intc_m_enable_irq_with_priority(uart->irq_num, uart->irq_priority);
#endif
    } else if (ctrl_arg == RT_DEVICE_FLAG_DMA_TX) {
        chg_config.src_addr_ctrl = DMA_MGR_ADDRESS_CONTROL_INCREMENT;
        chg_config.src_mode = DMA_MGR_HANDSHAKE_MODE_NORMAL;
        chg_config.src_width = DMA_TRANSFER_WIDTH_BYTE;
        chg_config.dst_addr = (uint32_t)&uart->uart_base->THR;
        chg_config.dst_addr_ctrl = DMA_MGR_ADDRESS_CONTROL_FIXED;
        chg_config.dst_mode = DMA_MGR_HANDSHAKE_MODE_HANDSHAKE;
        chg_config.dst_width = DMA_TRANSFER_WIDTH_BYTE;
        chg_config.en_dmamux = true;
        chg_config.dmamux_src = uart->tx_dma_mux;
        if (status_success != dma_mgr_setup_channel(&uart->tx_chn_ctx.resource, &chg_config)) {
            return -RT_ERROR;
        }
        dma_mgr_enable_chn_irq(&uart->tx_chn_ctx.resource, DMA_MGR_INTERRUPT_MASK_TC);
        dma_mgr_enable_dma_irq_with_priority(&uart->tx_chn_ctx.resource, 1);
    }
    return RT_EOK;
}

static void hpm_uart_receive_dma_next(struct rt_serial_device *serial)
{
    uint32_t buf_addr;
    uint32_t buf_size;
    struct hpm_uart *uart = (struct hpm_uart *)serial->parent.user_data;
    struct rt_serial_rx_fifo *rx_fifo = (struct rt_serial_rx_fifo *)serial->serial_rx;
#if defined(HPM_IP_FEATURE_UART_RX_IDLE_DETECT) && (HPM_IP_FEATURE_UART_RX_IDLE_DETECT == 1)
        buf_addr = (uint32_t)uart->rx_idle_tmp_buffer;
        buf_size = sizeof(uart->rx_idle_tmp_buffer);
#else
        buf_addr = (uint32_t)rx_fifo->rb.buffer_ptr;
        buf_size = serial->config.rx_bufsz;
#endif
    dma_mgr_set_chn_dst_addr(&uart->rx_chn_ctx.resource, buf_addr);
    dma_mgr_set_chn_transize(&uart->rx_chn_ctx.resource, buf_size);
    dma_mgr_enable_channel(&uart->rx_chn_ctx.resource);
}

static void hpm_uart_transmit_dma(struct rt_serial_device *serial, uint8_t *src, uint32_t size)
{
    struct hpm_uart *uart = (struct hpm_uart *)serial->parent.user_data;
    dma_mgr_set_chn_src_addr(&uart->tx_chn_ctx.resource, (uint32_t)src);
    dma_mgr_set_chn_transize(&uart->tx_chn_ctx.resource, size);
    dma_mgr_enable_channel(&uart->tx_chn_ctx.resource);
}

#endif /* RT_SERIAL_USING_DMA */

static rt_err_t hpm_uart_control(struct rt_serial_device *serial, int cmd, void *arg)
{
    RT_ASSERT(serial != RT_NULL);

    rt_ubase_t ctrl_arg = (rt_ubase_t) arg;
    uint8_t *tmp_buffer = NULL;
    struct rt_serial_rx_fifo *rx_fifo = (struct rt_serial_rx_fifo*)serial->serial_rx;
    struct rt_serial_tx_fifo *tx_fifo = (struct rt_serial_tx_fifo*)serial->serial_tx;
    struct hpm_uart *uart = (struct hpm_uart *)serial->parent.user_data;

    if(ctrl_arg & (RT_DEVICE_FLAG_RX_BLOCKING | RT_DEVICE_FLAG_RX_NON_BLOCKING))
    {
#ifdef RT_SERIAL_USING_DMA
        if (uart->dma_flags & RT_DEVICE_FLAG_DMA_RX)
        {
            ctrl_arg = RT_DEVICE_FLAG_DMA_RX;
        }
        else
#endif
        {
            ctrl_arg = RT_DEVICE_FLAG_INT_RX;
        }
    }
    else if(ctrl_arg & (RT_DEVICE_FLAG_TX_BLOCKING | RT_DEVICE_FLAG_TX_NON_BLOCKING))
    {
#ifdef RT_SERIAL_USING_DMA
        if (uart->dma_flags & RT_DEVICE_FLAG_DMA_TX)
        {
            ctrl_arg = RT_DEVICE_FLAG_DMA_TX;
        }
        else
#endif
        {
            ctrl_arg = RT_DEVICE_FLAG_INT_TX;
        }
    }

    switch (cmd) {
        case RT_DEVICE_CTRL_CLR_INT:
            if (ctrl_arg == RT_DEVICE_FLAG_INT_RX) {
                /* disable rx irq */
                uart_disable_irq(uart->uart_base, uart_intr_rx_data_avail_or_timeout);
                intc_m_disable_irq(uart->irq_num);
            }
            else if (ctrl_arg == RT_DEVICE_FLAG_INT_TX) {
                /* disable tx irq */
                uart_disable_irq(uart->uart_base, uart_intr_tx_slot_avail);
                intc_m_disable_irq(uart->irq_num);
            }
#ifdef RT_SERIAL_USING_DMA
            else if (ctrl_arg == RT_DEVICE_FLAG_DMA_TX) {
                dma_mgr_disable_chn_irq(&uart->tx_chn_ctx.resource, DMA_INTERRUPT_MASK_ALL);
                dma_abort_channel(uart->tx_chn_ctx.resource.base, uart->tx_chn_ctx.resource.channel);
                if (uart->tx_chn_ctx.ringbuf_ptr != RT_NULL) {
                    rt_free(uart->tx_chn_ctx.ringbuf_ptr);
                    uart->tx_chn_ctx.ringbuf_ptr = RT_NULL;
                }
            } else if (ctrl_arg == RT_DEVICE_FLAG_DMA_RX) {
                dma_mgr_disable_chn_irq(&uart->rx_chn_ctx.resource, DMA_INTERRUPT_MASK_ALL);
                dma_abort_channel(uart->rx_chn_ctx.resource.base, uart->rx_chn_ctx.resource.channel);
                if (uart->rx_chn_ctx.ringbuf_ptr != RT_NULL) {
                    rt_free(uart->rx_chn_ctx.ringbuf_ptr);
                    uart->rx_chn_ctx.ringbuf_ptr = RT_NULL;
                }
            }
#endif
            break;

        case RT_DEVICE_CTRL_SET_INT:
            if (ctrl_arg == RT_DEVICE_FLAG_INT_RX) {
                /* enable rx irq */
                uart_enable_irq(uart->uart_base, uart_intr_rx_data_avail_or_timeout);
                intc_m_enable_irq_with_priority(uart->irq_num, uart->irq_priority);
            } else if (ctrl_arg == RT_DEVICE_FLAG_INT_TX) {
                /* enable tx irq */
                uart_enable_irq(uart->uart_base, uart_intr_tx_slot_avail);
                intc_m_enable_irq_with_priority(uart->irq_num, uart->irq_priority);
            }
            break;

        case RT_DEVICE_CTRL_CONFIG:
#ifdef RT_SERIAL_USING_DMA
            if ((ctrl_arg == RT_DEVICE_FLAG_DMA_RX) || (ctrl_arg == RT_DEVICE_FLAG_INT_RX)) {
                    if ((rx_fifo) && (((rt_uint32_t)rx_fifo->rb.buffer_ptr % HPM_L1C_CACHELINE_SIZE) || (rx_fifo->rb.buffer_size % HPM_L1C_CACHELINE_SIZE))) {
                    rt_free(rx_fifo);
                    rx_fifo = RT_NULL;
                    rx_fifo = (struct rt_serial_rx_fifo *) rt_malloc(sizeof(struct rt_serial_rx_fifo));
                    RT_ASSERT(rx_fifo != RT_NULL);
                    tmp_buffer = rt_malloc(serial->config.rx_bufsz + HPM_L1C_CACHELINE_SIZE);
                    RT_ASSERT(tmp_buffer != RT_NULL);
                    if (uart->rx_chn_ctx.ringbuf_ptr != RT_NULL) {
                        rt_free(uart->rx_chn_ctx.ringbuf_ptr);
                    }
                    uart->rx_chn_ctx.ringbuf_ptr = (void *)tmp_buffer;
                    tmp_buffer += (HPM_L1C_CACHELINE_SIZE - ((rt_ubase_t) tmp_buffer % HPM_L1C_CACHELINE_SIZE));
                    rt_ringbuffer_init(&rx_fifo->rb, tmp_buffer, serial->config.rx_bufsz);
                    rt_ringbuffer_reset(&rx_fifo->rb);
                    serial->serial_rx = rx_fifo;
                }
            }

            if ((ctrl_arg == RT_DEVICE_FLAG_DMA_TX) || (ctrl_arg == RT_DEVICE_FLAG_INT_TX)) {
                    if ((tx_fifo) && (((rt_uint32_t)tx_fifo->rb.buffer_ptr % HPM_L1C_CACHELINE_SIZE) || (tx_fifo->rb.buffer_size % HPM_L1C_CACHELINE_SIZE))) {
                    rt_free(tx_fifo);
                    tx_fifo = RT_NULL;
                    tx_fifo = (struct rt_serial_tx_fifo *) rt_malloc(sizeof(struct rt_serial_tx_fifo));
                    RT_ASSERT(tx_fifo != RT_NULL);
                    tmp_buffer = rt_malloc(serial->config.tx_bufsz + HPM_L1C_CACHELINE_SIZE);
                    RT_ASSERT(tmp_buffer != RT_NULL);
                    if (uart->tx_chn_ctx.ringbuf_ptr != RT_NULL) {
                        rt_free(uart->tx_chn_ctx.ringbuf_ptr);
                    }
                    uart->tx_chn_ctx.ringbuf_ptr = (void *)tmp_buffer;
                    tmp_buffer += (HPM_L1C_CACHELINE_SIZE - ((rt_ubase_t) tmp_buffer % HPM_L1C_CACHELINE_SIZE));
                    rt_ringbuffer_init(&tx_fifo->rb, tmp_buffer, serial->config.tx_bufsz);
                    rt_ringbuffer_reset(&tx_fifo->rb);
                    tx_fifo->activated = RT_FALSE;
                    tx_fifo->put_size = 0;
                    serial->serial_tx = tx_fifo;
                }
            }

            if (ctrl_arg & (RT_DEVICE_FLAG_DMA_RX | RT_DEVICE_FLAG_DMA_TX)) {
                hpm_uart_dma_config(serial, (void *)ctrl_arg);
            } else
#endif
            {
                hpm_uart_control(serial, RT_DEVICE_CTRL_SET_INT, (void *)ctrl_arg);
            }
            break;
        case RT_DEVICE_CHECK_OPTMODE:
#ifdef RT_SERIAL_USING_DMA
            if ((ctrl_arg & RT_DEVICE_FLAG_DMA_TX)) {
                return RT_SERIAL_TX_BLOCKING_NO_BUFFER;
            } else
#endif
            {
                return RT_SERIAL_TX_BLOCKING_BUFFER;
            }
    }

    return RT_EOK;
}


static int hpm_uart_putc(struct rt_serial_device *serial, char ch)
{
    struct hpm_uart *uart  = (struct hpm_uart *)serial->parent.user_data;
    uart_send_byte(uart->uart_base, ch);
    uart_flush(uart->uart_base);
    return ch;
}

static int hpm_uart_getc(struct rt_serial_device *serial)
{
    int result = -1;
    struct hpm_uart *uart  = (struct hpm_uart *)serial->parent.user_data;

    if (uart_check_status(uart->uart_base, uart_stat_data_ready)) {
        uart_receive_byte(uart->uart_base, (uint8_t*)&result);
    }

    return result;
}

static rt_ssize_t hpm_uart_transmit(struct rt_serial_device *serial,
                                    rt_uint8_t *buf,
                                    rt_size_t size,
                                    rt_uint32_t tx_flag)
{
    RT_ASSERT(serial != RT_NULL);
    RT_ASSERT(buf != RT_NULL);
    RT_ASSERT(size);
    uint32_t fifo_size = 0, tx_size = 0;
    uint32_t ringbuffer_data_len = 0;
    struct hpm_uart *uart = (struct hpm_uart *)serial->parent.user_data;
    struct rt_serial_tx_fifo *tx_fifo;
    tx_fifo = (struct rt_serial_tx_fifo *) serial->serial_tx;
    uint8_t ch = 0;
    RT_ASSERT(tx_fifo != RT_NULL);
#ifdef RT_SERIAL_USING_DMA
    if (uart->dma_flags & RT_DEVICE_FLAG_DMA_TX) {
        hpm_uart_dma_register_channel(serial, true, uart_tx_done, RT_NULL, RT_NULL);
        intc_m_enable_irq(uart->tx_chn_ctx.resource.irq_num);
        if (l1c_dc_is_enabled()) {
            uint32_t aligned_start = HPM_L1C_CACHELINE_ALIGN_DOWN((uint32_t)buf);
            uint32_t aligned_end = HPM_L1C_CACHELINE_ALIGN_UP((uint32_t)buf + size);
            uint32_t aligned_size = aligned_end - aligned_start;
            l1c_dc_flush(aligned_start, aligned_size);
        }
        hpm_uart_transmit_dma(serial, buf, size);
        return size;
    } else {
#else
    {
#endif

        if (size > 0) {
            if (uart_check_status(uart->uart_base, uart_stat_tx_slot_avail)) {
                uart_disable_irq(uart->uart_base, uart_intr_tx_slot_avail);
                fifo_size = uart_get_fifo_size(uart->uart_base);
                ringbuffer_data_len = rt_ringbuffer_data_len(&tx_fifo->rb);
                tx_size = (ringbuffer_data_len > fifo_size) ? fifo_size : ringbuffer_data_len;
                for (uint32_t i = 0; i < tx_size; i++) {
                    rt_ringbuffer_getchar(&tx_fifo->rb, &ch);
                    uart_write_byte(uart->uart_base, ch);
                }
                uart_enable_irq(uart->uart_base, uart_intr_tx_slot_avail);
            }
        }
    }
    return size;
}

static const struct rt_uart_ops hpm_uart_ops = {
    hpm_uart_configure,
    hpm_uart_control,
    hpm_uart_putc,
    hpm_uart_getc,
    hpm_uart_transmit,
};



static int hpm_uart_config(void)
{
    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
    hpm_stat_t status = status_success;

#ifdef BSP_USING_UART0
    uarts[HPM_UART0_INDEX].serial->config = config;
    uarts[HPM_UART0_INDEX].serial->config.rx_bufsz = BSP_UART0_RX_BUFSIZE;
    uarts[HPM_UART0_INDEX].serial->config.tx_bufsz = BSP_UART0_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART0_INDEX].dma_flags = 0;
#ifdef BSP_UART0_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART0_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART0_RX_USING_DMA
#ifdef BSP_UART0_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART0_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART0_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART0

#ifdef BSP_USING_UART1
    uarts[HPM_UART1_INDEX].serial->config = config;
    uarts[HPM_UART1_INDEX].serial->config.rx_bufsz = BSP_UART1_RX_BUFSIZE;
    uarts[HPM_UART1_INDEX].serial->config.tx_bufsz = BSP_UART1_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART1_INDEX].dma_flags = 0;
#ifdef BSP_UART1_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART1_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART1_RX_USING_DMA
#ifdef BSP_UART1_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART1_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART1_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART1

#ifdef BSP_USING_UART2
    uarts[HPM_UART2_INDEX].serial->config = config;
    uarts[HPM_UART2_INDEX].serial->config.rx_bufsz = BSP_UART2_RX_BUFSIZE;
    uarts[HPM_UART2_INDEX].serial->config.tx_bufsz = BSP_UART2_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART2_INDEX].dma_flags = 0;
#ifdef BSP_UART2_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART2_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART2_RX_USING_DMA
#ifdef BSP_UART2_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART2_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART2_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART2

#ifdef BSP_USING_UART3
    uarts[HPM_UART3_INDEX].serial->config = config;
    uarts[HPM_UART3_INDEX].serial->config.rx_bufsz = BSP_UART3_RX_BUFSIZE;
    uarts[HPM_UART3_INDEX].serial->config.tx_bufsz = BSP_UART3_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART3_INDEX].dma_flags = 0;
#ifdef BSP_UART3_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART3_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART3_RX_USING_DMA
#ifdef BSP_UART3_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART3_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART3_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART3

#ifdef BSP_USING_UART4
    uarts[HPM_UART4_INDEX].serial->config = config;
    uarts[HPM_UART4_INDEX].serial->config.rx_bufsz = BSP_UART4_RX_BUFSIZE;
    uarts[HPM_UART4_INDEX].serial->config.tx_bufsz = BSP_UART4_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART4_INDEX].dma_flags = 0;
#ifdef BSP_UART4_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART4_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART4_RX_USING_DMA
#ifdef BSP_UART4_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART4_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART4_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART4

#ifdef BSP_USING_UART5
    uarts[HPM_UART5_INDEX].serial->config = config;
    uarts[HPM_UART5_INDEX].serial->config.rx_bufsz = BSP_UART5_RX_BUFSIZE;
    uarts[HPM_UART5_INDEX].serial->config.tx_bufsz = BSP_UART5_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART5_INDEX].dma_flags = 0;
#ifdef BSP_UART5_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART5_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART5_RX_USING_DMA
#ifdef BSP_UART5_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART5_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART5_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART5

#ifdef BSP_USING_UART6
    uarts[HPM_UART6_INDEX].serial->config = config;
    uarts[HPM_UART6_INDEX].serial->config.rx_bufsz = BSP_UART6_RX_BUFSIZE;
    uarts[HPM_UART6_INDEX].serial->config.tx_bufsz = BSP_UART6_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART6_INDEX].dma_flags = 0;
#ifdef BSP_UART6_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART6_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART6_RX_USING_DMA
#ifdef BSP_UART6_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART6_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART6_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART6

#ifdef BSP_USING_UART7
    uarts[HPM_UART7_INDEX].serial->config = config;
    uarts[HPM_UART7_INDEX].serial->config.rx_bufsz = BSP_UART7_RX_BUFSIZE;
    uarts[HPM_UART7_INDEX].serial->config.tx_bufsz = BSP_UART7_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART7_INDEX].dma_flags = 0;
#ifdef BSP_UART7_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART7_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART7_RX_USING_DMA
#ifdef BSP_UART7_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART7_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART7_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART7

#ifdef BSP_USING_UART8
    uarts[HPM_UART8_INDEX].serial->config = config;
    uarts[HPM_UART8_INDEX].serial->config.rx_bufsz = BSP_UART8_RX_BUFSIZE;
    uarts[HPM_UART8_INDEX].serial->config.tx_bufsz = BSP_UART8_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART8_INDEX].dma_flags = 0;
#ifdef BSP_UART8_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART8_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART8_RX_USING_DMA
#ifdef BSP_UART8_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART8_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART8_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART8

#ifdef BSP_USING_UART9
    uarts[HPM_UART9_INDEX].serial->config = config;
    uarts[HPM_UART9_INDEX].serial->config.rx_bufsz = BSP_UART9_RX_BUFSIZE;
    uarts[HPM_UART9_INDEX].serial->config.tx_bufsz = BSP_UART9_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART9_INDEX].dma_flags = 0;
#ifdef BSP_UART9_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART9_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART9_RX_USING_DMA
#ifdef BSP_UART9_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART9_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART9_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART9

#ifdef BSP_USING_UART10
    uarts[HPM_UART10_INDEX].serial->config = config;
    uarts[HPM_UART10_INDEX].serial->config.rx_bufsz = BSP_UART10_RX_BUFSIZE;
    uarts[HPM_UART10_INDEX].serial->config.tx_bufsz = BSP_UART10_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART10_INDEX].dma_flags = 0;
#ifdef BSP_UART10_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART10_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART10_RX_USING_DMA
#ifdef BSP_UART10_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART10_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART10_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART10

#ifdef BSP_USING_UART11
    uarts[HPM_UART11_INDEX].serial->config = config;
    uarts[HPM_UART11_INDEX].serial->config.rx_bufsz = BSP_UART11_RX_BUFSIZE;
    uarts[HPM_UART11_INDEX].serial->config.tx_bufsz = BSP_UART11_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART11_INDEX].dma_flags = 0;
#ifdef BSP_UART11_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART11_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART11_RX_USING_DMA
#ifdef BSP_UART11_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART11_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART11_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART11

#ifdef BSP_USING_UART12
    uarts[HPM_UART12_INDEX].serial->config = config;
    uarts[HPM_UART12_INDEX].serial->config.rx_bufsz = BSP_UART12_RX_BUFSIZE;
    uarts[HPM_UART12_INDEX].serial->config.tx_bufsz = BSP_UART12_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART12_INDEX].dma_flags = 0;
#ifdef BSP_UART12_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART12_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART12_RX_USING_DMA
#ifdef BSP_UART12_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART12_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART12_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART12

#ifdef BSP_USING_UART13
    uarts[HPM_UART13_INDEX].serial->config = config;
    uarts[HPM_UART13_INDEX].serial->config.rx_bufsz = BSP_UART13_RX_BUFSIZE;
    uarts[HPM_UART13_INDEX].serial->config.tx_bufsz = BSP_UART13_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART13_INDEX].dma_flags = 0;
#ifdef BSP_UART13_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART13_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART13_RX_USING_DMA
#ifdef BSP_UART13_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART13_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART13_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART13

#ifdef BSP_USING_UART14
    uarts[HPM_UART14_INDEX].serial->config = config;
    uarts[HPM_UART14_INDEX].serial->config.rx_bufsz = BSP_UART14_RX_BUFSIZE;
    uarts[HPM_UART14_INDEX].serial->config.tx_bufsz = BSP_UART14_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART14_INDEX].dma_flags = 0;
#ifdef BSP_UART14_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART14_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART14_RX_USING_DMA
#ifdef BSP_UART14_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART14_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART14_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART14

#ifdef BSP_USING_UART15
    uarts[HPM_UART15_INDEX].serial->config = config;
    uarts[HPM_UART15_INDEX].serial->config.rx_bufsz = BSP_UART15_RX_BUFSIZE;
    uarts[HPM_UART15_INDEX].serial->config.tx_bufsz = BSP_UART15_TX_BUFSIZE;
#ifdef RT_SERIAL_USING_DMA
    uarts[HPM_UART15_INDEX].dma_flags = 0;
#ifdef BSP_UART15_RX_USING_DMA
    status = hpm_uart_dma_rx_init(&uarts[HPM_UART15_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART15_RX_USING_DMA
#ifdef BSP_UART15_TX_USING_DMA
    status = hpm_uart_dma_tx_init(&uarts[HPM_UART15_INDEX]);
    if (status != status_success)
    {
        return -RT_ERROR;
    }
#endif //BSP_UART15_TX_USING_DMA
#endif // RT_SERIAL_USING_DMA
#endif //BSP_USING_UART15


    return RT_EOK;
}

int rt_hw_uart_init(void)
{
    /* Added bypass logic here since the rt_hw_uart_init function will be initialized twice, the 2nd initialization should be bypassed */
    static bool initialized;
    rt_err_t err = RT_EOK;
    if (initialized)
    {
        return err;
    }
    else
    {
        initialized = true;
    }

    if (RT_EOK != hpm_uart_config()) {
        return -RT_ERROR;
    }

    for (uint32_t i = 0; i < sizeof(uarts) / sizeof(uarts[0]); i++) {
        uarts[i].serial->ops = &hpm_uart_ops;

        /* register UART device */
        err = rt_hw_serial_register(uarts[i].serial,
                            uarts[i].device_name,
                            RT_DEVICE_FLAG_RDWR,
                            (void*)&uarts[i]);
    }

    return err;
}

INIT_BOARD_EXPORT(rt_hw_uart_init);

#endif /* RT_USING_SERIAL */