freebsd-nq/sys/i386/isa/wdc_p.h
Stefan Eßer e93e9e7392 Add support for the buggy CMD640B PCI EIDE controller chip, which
can't perform overlapping commands on both of its channels.

To enable the CMD640B work-around, the kernel must be compiled with
"options CMD640". Without that option there should be no difference
in the code produced compared to the previous revision of wd.c.

Submitted by:	Wolfgang Helbig <helbig@ba-stuttgart.de>
1997-03-11 23:17:28 +00:00

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C

/*
*
* Copyright (c) 1996 Wolfgang Helbig <helbig@ba-stuttgart.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice immediately at the beginning of the file, without modification,
* this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Absolutely no warranty of function or purpose is made by the author.
* 4. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id$
*/
#define Q_CMD640B 0x00000001 /* CMD640B quirk: serialize IDE channels */
void wdc_pci(int quirks);