mirror of https://gerrit.osmocom.org/libusrp
117 lines
3.4 KiB
C++
117 lines
3.4 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2003 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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// Fast USB interface
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#ifndef _FUSB_LINUX_H_
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#define _FUSB_LINUX_H_
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#include <fusb.h>
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#include <list>
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struct usbdevfs_urb;
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class fusb_ephandle_linux;
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/*!
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* \brief linux specific implementation of fusb_devhandle using usbdevice_fs
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*/
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class fusb_devhandle_linux : public fusb_devhandle {
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private:
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std::list<usbdevfs_urb*> d_pending_rqsts;
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void pending_add (usbdevfs_urb *urb);
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bool pending_remove (usbdevfs_urb *urb);
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usbdevfs_urb * pending_get ();
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public:
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// CREATORS
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fusb_devhandle_linux (usb_dev_handle *udh);
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virtual ~fusb_devhandle_linux ();
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// MANIPULATORS
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virtual fusb_ephandle *make_ephandle (int endpoint, bool input_p,
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int block_size = 0, int nblocks = 0);
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// internal use only
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bool _submit_urb (usbdevfs_urb *urb);
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bool _cancel_urb (usbdevfs_urb *urb);
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void _cancel_pending_rqsts (fusb_ephandle_linux *eph);
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bool _reap (bool ok_to_block_p);
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void _wait_for_completion ();
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};
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/*!
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* \brief linux specific implementation of fusb_ephandle using usbdevice_fs
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*/
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class fusb_ephandle_linux : public fusb_ephandle {
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private:
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fusb_devhandle_linux *d_devhandle;
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std::list<usbdevfs_urb*> d_free_list;
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std::list<usbdevfs_urb*> d_completed_list;
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usbdevfs_urb *d_write_work_in_progress;
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unsigned char *d_write_buffer;
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usbdevfs_urb *d_read_work_in_progress;
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unsigned char *d_read_buffer;
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unsigned char *d_read_buffer_end;
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usbdevfs_urb *get_write_work_in_progress ();
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void reap_complete_writes ();
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bool reload_read_buffer ();
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bool submit_urb (usbdevfs_urb *urb);
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public:
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fusb_ephandle_linux (fusb_devhandle_linux *dh, int endpoint, bool input_p,
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int block_size = 0, int nblocks = 0);
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virtual ~fusb_ephandle_linux ();
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virtual bool start (); //!< begin streaming i/o
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virtual bool stop (); //!< stop streaming i/o
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/*!
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* \returns \p nbytes if write was successfully enqueued, else -1.
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* Will block if no free buffers available.
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*/
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virtual int write (const void *buffer, int nbytes);
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/*!
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* \returns number of bytes read or -1 if error.
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* number of bytes read will be <= nbytes.
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* Will block if no input available.
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*/
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virtual int read (void *buffer, int nbytes);
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/*
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* block until all outstanding writes have completed
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*/
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virtual void wait_for_completion ();
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// internal use only
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void free_list_add (usbdevfs_urb *urb);
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void completed_list_add (usbdevfs_urb *urb);
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usbdevfs_urb *free_list_get (); // pop and return head of list or 0
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usbdevfs_urb *completed_list_get (); // pop and return head of list or 0
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};
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#endif /* _FUSB_LINUX_H_ */
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