'\" t
.\"     Title: ata_dev_classify
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: April 2019
.\"    Manual: libata Library
.\"    Source: Kernel Hackers Manual 4.9.168
.\"  Language: English
.\"
.TH "ATA_DEV_CLASSIFY" "9" "April 2019" "Kernel Hackers Manual 4\&.9\&." "libata Library"
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.SH "NAME"
ata_dev_classify \- determine device type based on ATA\-spec signature
.SH "SYNOPSIS"
.HP \w'unsigned\ int\ ata_dev_classify('u
.BI "unsigned int ata_dev_classify(const\ struct\ ata_taskfile\ *\ " "tf" ");"
.SH "ARGUMENTS"
.PP
\fItf\fR
.RS 4
ATA taskfile register set for device to be identified
.RE
.SH "DESCRIPTION"
.PP
Determine from taskfile register contents whether a device is ATA or ATAPI, as per
\(lqSignature and persistence\(rq
section of ATA/PI spec (volume 1, sect 5\&.14)\&.
.PP
LOCKING: None\&.
.SH "RETURN"
.PP
Device type,
\fBATA_DEV_ATA\fR,
\fBATA_DEV_ATAPI\fR,
\fBATA_DEV_PMP\fR,
\fBATA_DEV_ZAC\fR, or
\fBATA_DEV_UNKNOWN\fR
the event of failure\&.
.SH "AUTHOR"
.PP
\fBJeff Garzik\fR
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br