/* -*- 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 #include 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 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 d_free_list; std::list 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_ */