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/* -*- c++ -*- */
/*
* Copyright 2003 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
// Fast USB interface
#ifndef _FUSB_LINUX_H_
#define _FUSB_LINUX_H_
#include <fusb.h>
#include <list>
struct usbdevfs_urb;
class fusb_ephandle_linux;
/*!
* \brief linux specific implementation of fusb_devhandle using usbdevice_fs
*/
class fusb_devhandle_linux : public fusb_devhandle {
private:
std::list<usbdevfs_urb*> d_pending_rqsts;
void pending_add (usbdevfs_urb *urb);
bool pending_remove (usbdevfs_urb *urb);
usbdevfs_urb * pending_get ();
public:
// CREATORS
fusb_devhandle_linux (usb_dev_handle *udh);
virtual ~fusb_devhandle_linux ();
// MANIPULATORS
virtual fusb_ephandle *make_ephandle (int endpoint, bool input_p,
int block_size = 0, int nblocks = 0);
// internal use only
bool _submit_urb (usbdevfs_urb *urb);
bool _cancel_urb (usbdevfs_urb *urb);
void _cancel_pending_rqsts (fusb_ephandle_linux *eph);
bool _reap (bool ok_to_block_p);
void _wait_for_completion ();
};
/*!
* \brief linux specific implementation of fusb_ephandle using usbdevice_fs
*/
class fusb_ephandle_linux : public fusb_ephandle {
private:
fusb_devhandle_linux *d_devhandle;
std::list<usbdevfs_urb*> d_free_list;
std::list<usbdevfs_urb*> d_completed_list;
usbdevfs_urb *d_write_work_in_progress;
unsigned char *d_write_buffer;
usbdevfs_urb *d_read_work_in_progress;
unsigned char *d_read_buffer;
unsigned char *d_read_buffer_end;
usbdevfs_urb *get_write_work_in_progress ();
void reap_complete_writes ();
bool reload_read_buffer ();
bool submit_urb (usbdevfs_urb *urb);
public:
fusb_ephandle_linux (fusb_devhandle_linux *dh, int endpoint, bool input_p,
int block_size = 0, int nblocks = 0);
virtual ~fusb_ephandle_linux ();
virtual bool start (); //!< begin streaming i/o
virtual bool stop (); //!< stop streaming i/o
/*!
* \returns \p nbytes if write was successfully enqueued, else -1.
* Will block if no free buffers available.
*/
virtual int write (const void *buffer, int nbytes);
/*!
* \returns number of bytes read or -1 if error.
* number of bytes read will be <= nbytes.
* Will block if no input available.
*/
virtual int read (void *buffer, int nbytes);
/*
* block until all outstanding writes have completed
*/
virtual void wait_for_completion ();
// internal use only
void free_list_add (usbdevfs_urb *urb);
void completed_list_add (usbdevfs_urb *urb);
usbdevfs_urb *free_list_get (); // pop and return head of list or 0
usbdevfs_urb *completed_list_get (); // pop and return head of list or 0
};
#endif /* _FUSB_LINUX_H_ */
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