linux-imx

// SPDX-License-Identifier: GPL-2.0-or-later

/*      National Semiconductor NS87560UBD Super I/O controller used in

 *      HP [BCJ]x000 workstations.

 *

 *      This chip is a horrid piece of engineering, and National

 *      denies any knowledge of its existence. Thus no datasheet is

 *      available off www.national.com. 

 *

 *  (C) Copyright 2000 Linuxcare, Inc.

 *  (C) Copyright 2000 Linuxcare Canada, Inc.

 *  (C) Copyright 2000 Martin K. Petersen <mkp@linuxcare.com>

 *  (C) Copyright 2000 Alex deVries <alex@onefishtwo.ca>

 *      (C) Copyright 2001 John Marvin <jsm fc hp com>

 *      (C) Copyright 2003 Grant Grundler <grundler parisc-linux org>

 *  (C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org>

 *  (C) Copyright 2006 Helge Deller <deller@gmx.de>

 *

 *  The initial version of this is by Martin Peterson.  Alex deVries

 *  has spent a bit of time trying to coax it into working.

 *

 *      Major changes to get basic interrupt infrastructure working to

 *      hopefully be able to support all SuperIO devices. Currently

 *      works with serial. -- John Marvin <jsm@fc.hp.com>

 *

 *  Converted superio_init() to be a PCI_FIXUP_FINAL callee.

 *         -- Kyle McMartin <kyle@parisc-linux.org>

 */

​

​

/* NOTES:

 * 

 * Function 0 is an IDE controller. It is identical to a PC87415 IDE

 * controller (and identifies itself as such).

 *

 * Function 1 is a "Legacy I/O" controller. Under this function is a

 * whole mess of legacy I/O peripherals. Of course, HP hasn't enabled

 * all the functionality in hardware, but the following is available:

 *

 *      Two 16550A compatible serial controllers

 *      An IEEE 1284 compatible parallel port

 *      A floppy disk controller

 *

 * Function 2 is a USB controller.

 *

 * We must be incredibly careful during initialization.  Since all

 * interrupts are routed through function 1 (which is not allowed by

 * the PCI spec), we need to program the PICs on the legacy I/O port

 * *before* we attempt to set up IDE and USB.  @#$!&

 *

 * According to HP, devices are only enabled by firmware if they have

 * a physical device connected.

 *

 * Configuration register bits:

 *     0x5A: FDC, SP1, IDE1, SP2, IDE2, PAR, Reserved, P92

 *     0x5B: RTC, 8259, 8254, DMA1, DMA2, KBC, P61, APM

 *

 */

​

#include <linux/errno.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/types.h>

#include <linux/interrupt.h>