text: /*
   * Copyright (c) 2006-2018, Synwit Technology Co.,Ltd.
   *
   * SPDX-License-Identifier: Apache-2.0
   *
   * Change Logs:
   * Date           Author       Notes
   * 2018-05-31     ZYH          first version
   * 2018-12-10     Zohar_Lee    format file
   * 2020-07-10     lik          format file
   */
  
  #include "drv_uart.h"
  
  #ifdef RT_USING_SERIAL
  #ifdef BSP_USING_UART
  
  //#define DRV_DEBUG
  #define LOG_TAG "drv.uart"
  #include <drv_log.h>
  
  #if !defined(BSP_USING_UART0) && !defined(BSP_USING_UART1) && !defined(BSP_USING_UART2) && \
      !defined(BSP_USING_UART3)
  #error "Please define at least one BSP_USING_UARTx"
  /* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
  #endif
  
  enum
  {
  #ifdef BSP_USING_UART0
      UART0_INDEX,
  #endif
  #ifdef BSP_USING_UART1
      UART1_INDEX,
  #endif
  #ifdef BSP_USING_UART2
      UART2_INDEX,
  #endif
  #ifdef BSP_USING_UART3
      UART3_INDEX,
  #endif
  };
  
  static struct swm_uart_cfg uart_cfg[] =
      {
  #ifdef BSP_USING_UART0
          UART0_CFG,
  #endif
  #ifdef BSP_USING_UART1
          UART1_CFG,
  #endif
  #ifdef BSP_USING_UART2
          UART2_CFG,
  #endif
  #ifdef BSP_USING_UART3
          UART3_CFG,
  #endif
  };
  
  static struct swm_uart uart_drv[sizeof(uart_cfg) / sizeof(uart_cfg[0])] = {0};
  
  static rt_err_t swm_uart_init(struct rt_serial_device *serial_device, struct serial_configure *configure)
  {
      struct swm_uart_cfg *cfg;
      RT_ASSERT(serial_device != RT_NULL);
      RT_ASSERT(configure != RT_NULL);
      cfg = serial_device->parent.user_data;
  
      cfg->uart_initstruct.Baudrate = configure->baud_rate;
      switch (configure->data_bits)
      {
      case DATA_BITS_8:
          cfg->uart_initstruct.DataBits = UART_DATA_8BIT;
          break;
      case DATA_BITS_9:
          cfg->uart_initstruct.DataBits = UART_DATA_9BIT;
          break;
      default:
          cfg->uart_initstruct.DataBits = UART_DATA_8BIT;
          break;
      }
      switch (configure->stop_bits)
      {
      case STOP_BITS_1:
          cfg->uart_initstruct.StopBits = UART_STOP_1BIT;
          break;
      case STOP_BITS_2:
          cfg->uart_initstruct.StopBits = UART_STOP_2BIT;
          break;
      default:
          cfg->uart_initstruct.StopBits = UART_STOP_1BIT;
          break;
      }
      switch (configure->parity)
      {
      case PARITY_NONE:
          cfg->uart_initstruct.Parity = UART_PARITY_NONE;
          break;
      case PARITY_ODD:
          cfg->uart_initstruct.Parity = UART_PARITY_ODD;
          break;
      case PARITY_EVEN:
          cfg->uart_initstruct.Parity = UART_PARITY_EVEN;
          break;
      default:
          cfg->uart_initstruct.Parity = UART_PARITY_NONE;
          break;
      }
      switch ((uint32_t)cfg->UARTx)
      {
      case ((uint32_t)UART0):
          PORT_Init(PORTA, PIN2, FUNMUX0_UART0_RXD, 1);
          PORT_Init(PORTA, PIN3, FUNMUX1_UART0_TXD, 0);
          break;
      case ((uint32_t)UART1):
          PORT_Init(PORTC, PIN2, FUNMUX0_UART1_RXD, 1);
          PORT_Init(PORTC, PIN3, FUNMUX1_UART1_TXD, 0);
          break;
      case ((uint32_t)UART2):
          PORT_Init(PORTC, PIN4, FUNMUX0_UART2_RXD, 1);
          PORT_Init(PORTC, PIN5, FUNMUX1_UART2_TXD, 0);
          break;
      case ((uint32_t)UART3):
          PORT_Init(PORTC, PIN6, FUNMUX0_UART3_RXD, 1);
          PORT_Init(PORTC, PIN7, FUNMUX1_UART3_TXD, 0);
          break;
      default:
          break;
      }
      UART_Init(cfg->UARTx, &(cfg->uart_initstruct));
      UART_Open(cfg->UARTx);
      return RT_EOK;
  }
  
  static rt_err_t swm_uart_control(struct rt_serial_device *serial_device, int cmd, void *arg)
  {
      struct swm_uart_cfg *cfg;
      RT_ASSERT(serial_device != RT_NULL);
      cfg = serial_device->parent.user_data;
  
      switch (cmd)
      {
      case RT_DEVICE_CTRL_CLR_INT:
          /* disable rx irq */
          NVIC_DisableIRQ(cfg->irq);
          break;
      case RT_DEVICE_CTRL_SET_INT:
          /* enable rx irq */
          NVIC_EnableIRQ(cfg->irq);
          break;
      }
      return RT_EOK;
  }
  
  static int swm_uart_putc(struct rt_serial_device *serial_device, char c)
  {
      struct swm_uart_cfg *cfg;
      RT_ASSERT(serial_device != RT_NULL);
      cfg = serial_device->parent.user_data;
  
      while (UART_IsTXFIFOFull(cfg->UARTx))
          ;
      UART_WriteByte(cfg->UARTx, c);
      while (UART_IsTXBusy(cfg->UARTx))
          ;
      return 1;
  }
  
  static int swm_uart_getc(struct rt_serial_device *serial_device)
  {
      int ch;
      struct swm_uart_cfg *cfg;
      RT_ASSERT(serial_device != RT_NULL);
      cfg = serial_device->parent.user_data;
  
      ch = -1;
      if (UART_IsRXFIFOEmpty(cfg->UARTx) == 0)
      {
          UART_ReadByte(cfg->UARTx, (uint32_t *)&ch);
      }
      return ch;
  }
  
  static const struct rt_uart_ops swm_uart_ops =
      {
          .configure = swm_uart_init,
          .control = swm_uart_control,
          .putc = swm_uart_putc,
          .getc = swm_uart_getc,
          .dma_transmit = RT_NULL};
  
  /**
   * Uart common interrupt process. This need add to uart ISR.
   *
   * @param serial serial device
   */
  static void rt_hw_uart_isr(struct rt_serial_device *serial_device)
  {
      struct swm_uart_cfg *cfg;
      RT_ASSERT(serial_device != RT_NULL);
      cfg = serial_device->parent.user_data;
  
      /* UART in mode Receiver -------------------------------------------------*/
      if (UART_INTRXThresholdStat(cfg->UARTx) || UART_INTTimeoutStat(cfg->UARTx))
      {
          rt_hw_serial_isr(serial_device, RT_SERIAL_EVENT_RX_IND);
      }
  }
  
  #if defined(BSP_USING_UART0)
  void UART0_Handler(void)
  {
      /* enter interrupt */
      rt_interrupt_enter();
  
      rt_hw_uart_isr(&(uart_drv[UART0_INDEX].serial_device));
  
      /* leave interrupt */
      rt_interrupt_leave();
  }
  #endif /* BSP_USING_UART0 */
  
  #if defined(BSP_USING_UART1)
  void UART1_Handler(void)
  {
      /* enter interrupt */
      rt_interrupt_enter();
  
      rt_hw_uart_isr(&(uart_drv[UART1_INDEX].serial_device));
  
      /* leave interrupt */
      rt_interrupt_leave();
  }
  #endif /* BSP_USING_UART1 */
  
  #if defined(BSP_USING_UART2)
  void UART2_Handler(void)
  {
      /* enter interrupt */
      rt_interrupt_enter();
  
      rt_hw_uart_isr(&(uart_drv[UART2_INDEX].serial_device));
  
      /* leave interrupt */
      rt_interrupt_leave();
  }
  #endif /* BSP_USING_UART2 */
  
  #if defined(BSP_USING_UART3)
  void UART3_Handler(void)
  {
      /* enter interrupt */
      rt_interrupt_enter();
  
      rt_hw_uart_isr(&(uart_drv[UART3_INDEX].serial_device));
  
      /* leave interrupt */
      rt_interrupt_leave();
  }
  #endif /* BSP_USING_UART3 */
  
  int rt_hw_uart_init(void)
  {
      struct serial_configure cfg = RT_SERIAL_CONFIG_DEFAULT;
      int i = 0;
      rt_err_t result = RT_EOK;
  
      for (i = 0; i < sizeof(uart_cfg) / sizeof(uart_cfg[0]); i++)
      {
          uart_drv[i].cfg = &uart_cfg[i];
          uart_drv[i].serial_device.ops = &swm_uart_ops;
          uart_drv[i].serial_device.config = cfg;
          /* register UART device */
          result = rt_hw_serial_register(&uart_drv[i].serial_device, uart_drv[i].cfg->name,
                                         RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart_drv[i].cfg);
          RT_ASSERT(result == RT_EOK);
      }
  
      return result;
  }
  INIT_BOARD_EXPORT(rt_hw_uart_init);
  
  #endif /* BSP_USING_UART */
  #endif /* RT_USING_SERIAL */
  