urbasbytestream.h

USb in User space, a kernel module that use usb layer

/*
 * urbAsByteStream.h
 *
 * Author : Lionetti Salvatore <[e-mail]>
 * License: GPL
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

/* urbDataT:
 * =========
 * Take an already initialized urb and read/write bytes on it,
 * in only one solution: reading until avail, writing until space.
 * Urb parameter valid for any transfer type:
 * 
 *  urb->transfer_buffer_length is the bytes, used or !, of 
 *  urb->transfer_buffer.
 *  urb->status
 *
 * During read() we bypass status<0.
 *
 *  	 actual_length, for isoc ?*/
struct urbDataT {
	struct urb* urb;

	int curr;
	int curw;

	/* Needed only for isoc, when read/write: current frame.*/
	int cur_frame;
};

/* Read/Write until ret <=0 .*/
void 	initUrbD(struct urbDataT* ud, struct urb* urb);
int 	readUrbD(struct urbDataT* ud, char* buf, int len);
int 	writeUrbD(struct urbDataT* ud, char* buf, int len);
int 	emptyUrbD(struct urbDataT* ud);
void 	resetUrbD(struct urbDataT* ud);
int 	dumpUrbD(struct urbDataT* ud, char* buf, int len);
void 	testUrbD(void);

/* Util.*/
int pipe2addr(int pipe);