.\" This documentation was generated from the book titled "The Linux 2.4 Parallel Port Subsystem", which is part of the Linux kernel source. .\" .\" Documentation by: Tim Waugh (twaugh@redhat.com) .\" Documentation copyright: 1999-2000 Tim Waugh .\" This documentation comes with the following legal notice: .\" .\" Permission is granted to copy, distribute and/or modify this .\" document under the terms of the GNU Free Documentation License, .\" Version 1.1 or any later version published by the Free Software .\" Foundation; with no Invariant Sections, with no Front-Cover Texts, .\" and with no Back-Cover Texts. A copy of the license is included .\" in the section entitled "GNU Free Documentation License". .\" .\" For comments on the formatting of this manpage, please contact Michael Still .\" This manpage has been automatically generated by docbook2man .\" from a DocBook document. This tool can be found at: .\" .\" Please send any bug reports, improvements, comments, patches, .\" etc. to Steve Cheng . .TH "PARPORT_WRITE" "9" "06 August 2003" "" "" .SH NAME parport_write \- write a block of data to a parallel port .SH SYNOPSIS .sp \fB .sp ssize_t parport_write (struct parport * \fIport\fB, const void * \fIbuffer\fB, size_t \fIlen\fB); \fR .SH "ARGUMENTS" .TP \fB\fIport\fB\fR port to write to .TP \fB\fIbuffer\fB\fR data buffer (in kernel space) .TP \fB\fIlen\fB\fR number of bytes of data to transfer .SH "DESCRIPTION" .PP This will write up to \fIlen\fR bytes of \fIbuffer\fR to the port specified, using the IEEE 1284 transfer mode most recently negotiated to (using \fBparport_negotiate\fR), as long as that mode supports forward transfers (host to peripheral). .PP It is the caller's responsibility to ensure that the first \fIlen\fR bytes of \fIbuffer\fR are valid. .PP This function returns the number of bytes transferred (if zero or positive), or else an error code. .SH "ABOUT THIS DOCUMENT" .PP This documentation was generated with kernel version 2.6.0.