/*
* pata-legacy.c - Legacy port PATA/SATA controller driver.
* Copyright 2005/2006 Red Hat <alan@redhat.com>, all rights reserved.
*
* 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, 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; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* An ATA driver for the legacy ATA ports.
*
* Data Sources:
* Opti 82C465/82C611 support: Data sheets at opti-inc.com
* HT6560 series:
* Promise 20230/20620:
* http://www.ryston.cz/petr/vlb/pdc20230b.html
* http://www.ryston.cz/petr/vlb/pdc20230c.html
* http://www.ryston.cz/petr/vlb/pdc20630.html
*
* Unsupported but docs exist:
* Appian/Adaptec AIC25VL01/Cirrus Logic PD7220
*
* This driver handles legacy (that is "ISA/VLB side") IDE ports found
* on PC class systems. There are three hybrid devices that are exceptio
