io_api.h

MIPS下的boottloader yamon 的源代码

 *
 *  'OK'(=0)
 *  'ERROR_IO_ILLEGAL_MAJOR': Illegal major device number
 *  'ERROR_IO_NO_DRIVER':     Driver not installed
 *  'ERROR_IO_NO_FUNCTION':   Driver don't implement 'open'
 *
 *
 *  Note :
 *  ------
 *  The return values above are the IO-system specific values only.
 *  Errors, which are specific for the device driver, may be returned too.
 *
 ************************************************************************/
INT32 IO_open(
          UINT32 major,          /* IN: major device number             */
          UINT32 minor,          /* IN: minor device number             */
          void   *p_param ) ;    /* INOUT: device parameter block       */





/************************************************************************
 *
 *                          IO_close
 *  Description :
 *  -------------
 *
 *  This function looks up the 'close' function of the driver by use of
 *  the 'major' device number and calls the 'close' function with the
 *  supplied parameters, 'minor' and 'p_param'.
 *  
 *
 *  Parameters :
 *  ------------
 *
 *  'major',     IN,    major device number
 *  'minor',     IN,    minor device number for multi device drivers
 *  'p_param',   INOUT, device specific parameter block
 *
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)
 *  'ERROR_IO_ILLEGAL_MAJOR': Illegal major device number
 *  'ERROR_IO_NO_DRIVER':     Driver not installed
 *  'ERROR_IO_NO_FUNCTION':   Driver don't implement 'close'
 *
 *
 *  Note :
 *  ------
 *  The return values above are the IO-system specific values only.
 *  Errors, which are specific for the device driver, may be returned too.
 *
 ************************************************************************/
INT32 IO_close(
          UINT32 major,          /* IN: major device number             */
          UINT32 minor,          /* IN: minor device number             */
          void   *p_param ) ;    /* INOUT: device parameter block       */





/************************************************************************
 *
 *                          IO_read
 *  Description :
 *  -------------
 *
 *  This function looks up the 'read' function of the driver by use of
 *  the 'major' device number and calls the 'read' function with the
 *  supplied parameters, 'minor' and 'p_param'.
 *  
 *
 *  Parameters :
 *  ------------
 *
 *  'major',     IN,    major device number
 *  'minor',     IN,    minor device number for multi device drivers
 *  'p_param',   INOUT, device specific parameter block
 *
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)
 *  'ERROR_IO_ILLEGAL_MAJOR': Illegal major device number
 *  'ERROR_IO_NO_DRIVER':     Driver not installed
 *  'ERROR_IO_NO_FUNCTION':   Driver don't implement 'read'
 *
 *
 *  Note :
 *  ------
 *  The return values above are the IO-system specific values only.
 *  Errors, which are specific for the device driver, may be returned too.
 *
 ************************************************************************/
INT32 IO_read(
          UINT32 major,          /* IN: major device number             */
          UINT32 minor,          /* IN: minor device number             */
          void   *p_param ) ;    /* INOUT: device parameter block       */





/************************************************************************
 *
 *                          IO_write
 *  Description :
 *  -------------
 *
 *  This function looks up the 'write' function of the driver by use of
 *  the 'major' device number and calls the 'write' function with the
 *  supplied parameters, 'minor' and 'p_param'.
 *  
 *
 *  Parameters :
 *  ------------
 *
 *  'major',     IN,    major device number
 *  'minor',     IN,    minor device number for multi device drivers
 *  'p_param',   INOUT, device specific parameter block
 *
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)
 *  'ERROR_IO_ILLEGAL_MAJOR': Illegal major device number
 *  'ERROR_IO_NO_DRIVER':     Driver not installed
 *  'ERROR_IO_NO_FUNCTION':   Driver don't implement 'write'
 *
 *
 *  Note :
 *  ------
 *  The return values above are the IO-system specific values only.
 *  Errors, which are specific for the device driver, may be returned too.
 *
 ************************************************************************/
INT32 IO_write(
          UINT32 major,          /* IN: major device number             */
          UINT32 minor,          /* IN: minor device number             */
          void   *p_param ) ;    /* INOUT: device parameter block       */





/************************************************************************
 *
 *                          IO_ctrl
 *  Description :
 *  -------------
 *
 *  This function looks up the 'ctrl' function of the driver by use of
 *  the 'major' device number and calls the 'ctrl' function with the
 *  supplied parameters, 'minor' and 'p_param'.
 *  
 *
 *  Parameters :
 *  ------------
 *
 *  'major',     IN,    major device number
 *  'minor',     IN,    minor device number for multi device drivers
 *  'p_param',   INOUT, device specific parameter block
 *
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)
 *  'ERROR_IO_ILLEGAL_MAJOR': Illegal major device number
 *  'ERROR_IO_NO_DRIVER':     Driver not installed
 *  'ERROR_IO_NO_FUNCTION':   Driver don't implement 'ctrl'
 *
 *
 *  Note :
 *  ------
 *  The return values above are the IO-system specific values only.
 *  Errors, which are specific for the device driver, may be returned too.
 *
 ************************************************************************/
INT32 IO_ctrl(
          UINT32 major,          /* IN: major device number             */
          UINT32 minor,          /* IN: minor device number             */
          void   *p_param ) ;    /* INOUT: device parameter block       */


/************************************************************************
 *
 *                          IO_lookup
 *  Description :
 *  -------------
 *
 *  Lookup device driver data context pointer
 *  
 *  
 *  
 *
 *  Parameters :
 *  ------------
 *
 *  'major',     IN,    major device number
 *  'p_data',    OUT,   data context pointer
 *
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)
 *  'ERROR_IO_ILLEGAL_MAJOR': Illegal major device number
 *  'ERROR_IO_NO_DRIVER':     Driver not installed
 *
 ************************************************************************/
INT32 IO_lookup(  
          UINT32 major,          /* IN: major device number             */
          void   **p_data ) ;    /* OUT: device context data            */


/************************************************************************
 *
 *                          IO_save
 *  Description :
 *  -------------
 *
 *  Save device driver data context pointer
 *  
 *  
 *  
 *
 *  Parameters :
 *  ------------
 *
 *  'major',     IN,    major device number
 *  'p_data',    IN,    data context pointer
 *
 *
 *  Return values :
 *  ---------------
 *
 *  'OK'(=0)
 *  'ERROR_IO_ILLEGAL_MAJOR': Illegal major device number
 *  'ERROR_IO_NO_DRIVER':     Driver not installed
 *
 ************************************************************************/
INT32 IO_save(  
          UINT32 major,          /* IN: major device number             */
          void   *p_data ) ;     /* IN: device context data             */



#endif /* #ifndef IO_API_H */