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Regsiter description for APCI UART found on HP 9000/400-series 

systems with a Frodo Utility Chip.  This is essientially an 8250 with
3 bytes of padding between each register.  From mike smith
<miff@spam.frisbee.net.au>.
This commit is contained in:
thorpej 1997-04-14 20:36:11 +00:00
parent 89a63d43fa
commit 4767ae8d9d
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sys/arch/hp300/dev/apcireg.h Normal file
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/* $NetBSD: apcireg.h,v 1.1 1997/04/14 20:36:11 thorpej Exp $ */
/*
* Copyright (c) 1997 Michael Smith. 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, 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <hp300/dev/iotypes.h>
struct apciregs {
vu_char ap_data;
u_char pad0[3];
vu_char ap_ier;
u_char pad1[3];
vu_char ap_iir;
#define ap_fifo ap_iir
u_char pad2[3];
vu_char ap_cfcr;
u_char pad3[3];
vu_char ap_mcr;
u_char pad4[3];
vu_char ap_lsr;
u_char pad5[3];
vu_char ap_msr;
u_char pad6[3];
vu_char ap_scratch;
};
/* max number of apci ports */
#define APCI_MAXPORT 4
/* Frodo interrupt number of lowest apci port */
#define APCI_INTR0 12
/*
* baudrate divisor calculations.
*
* The input clock frequency appears to be 8.0064MHz, giving a scale
* factor of 500400. (Using exactly 8MHz gives framing errors with
* the Apollo keyboard.)
*/
#define APCIBRD(x) (500000 / (x))