/** \file gphoto2-port-library.h
 *
 * \author Copyright 2001 Lutz Mueller <lutz@users.sf.net>
 *
 * \par License
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * \par
 * This library is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details. 
 *
 * \par
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301  USA
 */

#ifndef __GPHOTO2_PORT_LIBRARY_H__
#define __GPHOTO2_PORT_LIBRARY_H__

#include <gphoto2/gphoto2-port-info-list.h>
#include <gphoto2/gphoto2-port.h>

/**
 * \brief The port operations
 * 
 * These operations are to be implemented and set by the port library,
 * which drives the lowlevel protocol (serial, usb, etc.).
 *
 * They are acessed using the accessor functions, like gp_port_open(),
 * gp_port_read() and gp_port_write().
 */
typedef struct _GPPortOperations {
        int (*init)     (GPPort *);
        int (*exit)     (GPPort *);
        int (*open)     (GPPort *);
        int (*close)    (GPPort *);
        int (*read)     (GPPort *,       char *, int);
        int (*check_int)(GPPort *,      char *, int, int);
        int (*write)    (GPPort *, const char *, int);
        int (*update)   (GPPort *);

        /* Pointers to devices. Please note these are stubbed so there is
         no need to #ifdef GP_PORT_* anymore. */

        /* for serial devices */
        int (*get_pin)   (GPPort *, GPPin, GPLevel*);
        int (*set_pin)   (GPPort *, GPPin, GPLevel);
        int (*send_break)(GPPort *, int);
        int (*flush)     (GPPort *, int);

        /* for USB devices */
        int (*find_device)(GPPort * dev, int idvendor, int idproduct);
        int (*find_device_by_class)(GPPort * dev, int class, int subclass, int protocol);
        int (*clear_halt) (GPPort * dev, int ep);
        int (*msg_write)  (GPPort * dev, int request, int value, int index,
                                char *bytes, int size);
        int (*msg_read)   (GPPort * dev, int request, int value, int index,
                                char *bytes, int size);
        int (*msg_interface_write)  (GPPort * dev, int request, 
                                int value, int index, char *bytes, int size);
        int (*msg_interface_read)  (GPPort * dev, int request, 
                                int value, int index, char *bytes, int size);
        int (*msg_class_write) (GPPort * dev, int request, 
                                int value, int index, char *bytes, int size);
        int (*msg_class_read) (GPPort * dev, int request, 
                                int value, int index, char *bytes, int size);

	/* For USB disk direct IO devices */
	int (*seek) (GPPort * dev, int offset, int whence);

	/* For USB Mass Storage raw SCSI ports */
	int (*send_scsi_cmd) (GPPort *port, int to_dev,
				char *cmd, int cmd_size,
				char *sense, int sense_size,
				char *data, int data_size);

        int (*reset)     (GPPort *);

} GPPortOperations;

typedef GPPortType (* GPPortLibraryType) (void);
typedef int (* GPPortLibraryList)       (GPPortInfoList *list);

typedef GPPortOperations *(* GPPortLibraryOperations) (void);

/*
 * If you want to write an io library, you need to implement the following
 * functions. Everything else in your io library should be declared static.
 */

GPPortType gp_port_library_type       (void);
int gp_port_library_list       (GPPortInfoList *list);

GPPortOperations *gp_port_library_operations (void);

#endif /* __GPHOTO2_PORT_LIBRARY_H__ */