gpi.hxx

// dawn/include/dawn/io/gpi.hxx
//
// SPDX-License-Identifier: Apache-2.0
//
 
#pragma once
 
#include "dawn/io/common.hxx"
#include "dawn/porting/config.hxx"
#include "dawn/porting/gpio.hxx"
 
namespace dawn
{
class CIOGpi : public CIOCommon
{
public:
  enum
  {
    IO_GPI_CFG_FIRST = 0,
    IO_GPI_CFG_LAST = 31
  };
 
  explicit CIOGpi(CDescObject &desc)
    : CIOCommon(desc)
    , path()
    , fd(-1)
  {
  }
 
  ~CIOGpi() override;
 
#ifdef CONFIG_DAWN_OBJECT_HAS_NAME
  const char *getClassNameStr() const override
  {
    return "gpi";
  }
#endif
 
  int configure() override;
  int init() override;
  int deinit() override;
  int getDataImpl(IODataCmn &data, size_t len) override;
 
#ifdef CONFIG_DAWN_IO_NOTIFY
  int getFd() const override;
#endif
 
  size_t getDataSize() const override;
  size_t getDataDim() const override;
 
  bool isRead() const override
  {
    return true;
  };
 
  bool isWrite() const override
  {
    return false;
  };
 
  bool isNotify() const override
  {
#ifdef CONFIG_DAWN_IO_NOTIFY
    // Determined at configure time: requires interrupt support from the
    // underlying GPIO device (GPIOC_REGISTER).
    return isNotifyIO;
#else
    return false;
#endif
  };
 
  bool isBatch() const override
  {
    return false;
  };
 
  using ObjectIdHelper = CIOCommon::IOObjectIdHelper<IO_CLASS_GPI_SINGLE, SObjectId::DTYPE_UINT32>;
 
  constexpr static SObjectId::ObjectId objectId(bool ts, uint16_t inst)
  {
    return ObjectIdHelper::create(ts, inst);
  }
 
private:
  char path[PATH_MAX]; 
  int fd;              
#ifdef CONFIG_DAWN_IO_NOTIFY
  bool isNotifyIO;     
#endif
 
  int configureDesc(const CDescObject &desc);
};
} // Namespace dawn