135 lines
5.4 KiB
C
135 lines
5.4 KiB
C
/* $NetBSD: z8530var.h,v 1.6 2002/03/17 19:40:44 atatat Exp $ */
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/*
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* Copyright (c) 1994 Gordon W. Ross
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)zsvar.h 8.1 (Berkeley) 6/11/93
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*/
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#include <dev/ic/z8530sc.h>
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/*
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* Clock source info structure, added here so xzs_chanstate works
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*/
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struct zsclksrc {
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long clk; /* clock rate, in MHz, present on signal line */
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int flags; /* Specifies how this source can be used
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(RTxC divided, RTxC BRG, PCLK BRG, TRxC divided)
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and also if the source is "external" and if it
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is changeable (by an ioctl ex.). The
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source usage flags are used by the tty
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child. The other bits tell zsloadchannelregs
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if it should call an md signal source
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changing routine. ZSC_VARIABLE says if
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an ioctl should be able to cahnge the
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clock rate.*/
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};
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#define ZSC_PCLK 0x01
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#define ZSC_RTXBRG 0x02
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#define ZSC_RTXDIV 0x04
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#define ZSC_TRXDIV 0x08
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#define ZSC_VARIABLE 0x40
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#define ZSC_EXTERN 0x80
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#define ZSC_BRG 0x03
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#define ZSC_DIV 0x0c
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/*
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* These are the machine-dependent (extended) variants of
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* struct zs_chanstate and struct zsc_softc
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*/
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struct xzs_chanstate {
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/* machine-independent part (First!)*/
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struct zs_chanstate xzs_cs;
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/* machine-dependent extensions */
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int cs_hwflags;
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int cs_chip; /* type of chip */
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/* Clock source info... */
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int cs_clock_count; /* how many signal sources available */
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struct zsclksrc cs_clocks[4]; /* info on available signal sources */
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long cs_cclk_flag; /* flag for current clock source */
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long cs_pclk_flag; /* flag for pending clock source */
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int cs_csource; /* current source # */
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int cs_psource; /* pending source # */
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};
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struct zsc_softc {
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struct device zsc_dev; /* required first: base device */
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struct zs_chanstate *zsc_cs[2]; /* channel A and B soft state */
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/* Machine-dependent part follows... */
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struct xzs_chanstate xzsc_xcs_store[2];
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};
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/*
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* Functions to read and write individual registers in a channel.
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* The ZS chip requires a 1.6 uSec. recovery time between accesses,
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* and the Sun3 hardware does NOT take care of this for you.
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* MacII hardware DOES dake care of the delay for us. :-)
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* XXX - Then these should be inline functions! -gwr
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* Some clock-chirped macs loose serial ports. It could be that the
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* hardware delay is tied to the CPU speed, and that the minimum delay
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* no longer's respected. For them, ZS_DELAY might help.
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* XXX - no one seems to want to try and check this -wrs
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*/
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u_char zs_read_reg __P((struct zs_chanstate *cs, u_char reg));
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u_char zs_read_csr __P((struct zs_chanstate *cs));
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u_char zs_read_data __P((struct zs_chanstate *cs));
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void zs_write_reg __P((struct zs_chanstate *cs, u_char reg, u_char val));
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void zs_write_csr __P((struct zs_chanstate *cs, u_char val));
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void zs_write_data __P((struct zs_chanstate *cs, u_char val));
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/* XXX - Could define splzs() here instead of in psl.h */
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/* Hook for MD ioctl support */
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int zsmdioctl __P((struct zs_chanstate *cs, u_long cmd, caddr_t data));
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/* XXX - This is a bit gross... */
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#define ZS_MD_IOCTL(cs, cmd, data) zsmdioctl(cs, cmd, data)
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/* Callback for "external" clock sources */
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void zsmd_setclock __P((struct zs_chanstate *cs));
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#define ZS_MD_SETCLK(cs) zsmd_setclock(cs)
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