uart_sbi.h

/* SPDX-License-Identifier: GPL-2.0-only or License-Ref-kk-custom */
/*
 * Copyright (C) 2021 Kernkonzept GmbH.
 * Author(s): Georg Kotheimer <georg.kotheimer@kernkonzept.com>
 */
#pragma once
 
#include "uart_base.h"
 
namespace L4
{
  class Uart_sbi : public Uart
  {
  public:
    Uart_sbi();
    explicit Uart_sbi(unsigned /*base_rate*/) : Uart_sbi() {}
    bool startup(Io_register_block const *) override;
    void shutdown() override;
    bool change_mode(Transfer_mode m, Baud_rate r) override;
    int get_char(bool blocking = true) const override;
    int char_avail() const override;
    int tx_avail() const { return true; }
    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;
  private:
    mutable int _bufchar;
  };
};