uart_s3c2410.h

/*
 * Copyright (C) 2009-2012 Technische Universität Dresden.
 * Copyright (C) 2023-2024 Kernkonzept GmbH.
 * Author(s): Adam Lackorzynski <adam@os.inf.tu-dresden.de>
 *
 * License: see LICENSE.spdx (in this directory or the directories above)
 */
#pragma once
 
#include "uart_base.h"
 
namespace L4 {
 
class Uart_s3c : public Uart
{
protected:
  enum Uart_type
  {
    Type_24xx, Type_64xx, Type_s5pv210,
  };
 
  Uart_type type() const { return _type; }
 
public:
  explicit Uart_s3c(Uart_type type) : _type(type) {}
  explicit Uart_s3c(Uart_type type, unsigned /*base_rate*/) : _type(type) {}
  bool startup(Io_register_block const *) override;
  void shutdown() override;
  bool change_mode(Transfer_mode m, Baud_rate r) override;
  int tx_avail() const;
  void wait_tx_done() const;
  inline void out_char(char c) const;
  int write(char const *s, unsigned long count,
            bool blocking = true) const override;
  void fifo_reset();
 
  int char_avail() const override;
  int get_char(bool blocking = true) const override;
 
protected:
  virtual void ack_rx_irq() const = 0;
  virtual void wait_for_empty_tx_fifo() const = 0;
  virtual unsigned is_rx_fifo_non_empty() const = 0;
  virtual unsigned is_tx_fifo_not_full() const = 0;
 
private:
  Uart_type _type;
};
 
class Uart_s3c2410 : public Uart_s3c
{
public:
  Uart_s3c2410() : Uart_s3c(Type_24xx) {}
  explicit Uart_s3c2410(unsigned base_rate) : Uart_s3c(Type_24xx, base_rate) {}
 
protected:
  void ack_rx_irq() const override {}
  void wait_for_empty_tx_fifo() const override;
  unsigned is_rx_fifo_non_empty() const override;
  unsigned is_tx_fifo_not_full() const override;
 
  void auto_flow_control(bool on);
};
 
class Uart_s3c64xx : public Uart_s3c
{
public:
  Uart_s3c64xx() : Uart_s3c(Type_64xx) {}
  explicit Uart_s3c64xx(unsigned base_rate) : Uart_s3c(Type_64xx, base_rate) {}
 
protected:
  void ack_rx_irq() const override;
  void wait_for_empty_tx_fifo() const override;
  unsigned is_rx_fifo_non_empty() const override;
  unsigned is_tx_fifo_not_full() const override;
};
 
class Uart_s5pv210 : public Uart_s3c
{
public:
  Uart_s5pv210() : Uart_s3c(Type_s5pv210) {}
  explicit Uart_s5pv210(unsigned base_rate) : Uart_s3c(Type_s5pv210, base_rate) {}
 
protected:
  void ack_rx_irq() const override;
  void wait_for_empty_tx_fifo() const override;
  unsigned is_rx_fifo_non_empty() const override;
  unsigned is_tx_fifo_not_full() const override;
};
 
} // namespace L4