112 lines
4.2 KiB
C
112 lines
4.2 KiB
C
/* $NetBSD: z8530sc.h,v 1.1 1996/01/24 01:07:24 gwr Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1994 Gordon W. Ross
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This software was developed by the Computer Systems Engineering group
|
|
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
|
|
* contributed to Berkeley.
|
|
*
|
|
* All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Lawrence Berkeley Laboratory.
|
|
*
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*
|
|
* @(#)zsvar.h 8.1 (Berkeley) 6/11/93
|
|
*/
|
|
|
|
|
|
/*
|
|
* Function vector - per channel
|
|
*/
|
|
struct zsops {
|
|
int (*zsop_rxint)(); /* receive char available */
|
|
int (*zsop_stint)(); /* external/status */
|
|
int (*zsop_txint)(); /* xmit buffer empty */
|
|
int (*zsop_softint)(); /* process software interrupt */
|
|
};
|
|
|
|
extern struct zsops zsops_null;
|
|
|
|
|
|
/*
|
|
* Software state, per zs channel.
|
|
*/
|
|
struct zs_chanstate {
|
|
|
|
/* Pointers to the device registers. */
|
|
volatile u_char *cs_reg_csr; /* ctrl, status, and reg. number. */
|
|
volatile u_char *cs_reg_data; /* data or numbered register */
|
|
|
|
int cs_channel; /* sub-unit number */
|
|
void *cs_private; /* sub-driver data pointer */
|
|
struct zsops *cs_ops;
|
|
|
|
int cs_pclk_div16; /* PCLK / 16 */
|
|
int cs_defspeed; /* default baud rate (from PROM) */
|
|
|
|
/*
|
|
* We must keep a copy of the write registers as they are
|
|
* mostly write-only and we sometimes need to set and clear
|
|
* individual bits (e.g., in WR3). Not all of these are
|
|
* needed but 16 bytes is cheap and this makes the addressing
|
|
* simpler. Unfortunately, we can only write to some registers
|
|
* when the chip is not actually transmitting, so whenever
|
|
* we are expecting a `transmit done' interrupt the preg array
|
|
* is allowed to `get ahead' of the current values. In a
|
|
* few places we must change the current value of a register,
|
|
* rather than (or in addition to) the pending value; for these
|
|
* cs_creg[] contains the current value.
|
|
*/
|
|
u_char cs_creg[16]; /* current values */
|
|
u_char cs_preg[16]; /* pending values */
|
|
|
|
u_char cs_heldchange; /* change pending (creg != preg) */
|
|
u_char cs_rr0; /* last rr0 processed */
|
|
|
|
char cs_softreq; /* need soft interrupt call */
|
|
char cs__spare;
|
|
};
|
|
|
|
struct zsc_softc {
|
|
struct device zsc_dev; /* required first: base device */
|
|
struct zs_chanstate zsc_cs[2]; /* channel A and B soft state */
|
|
};
|
|
|
|
struct zsc_attach_args {
|
|
int channel; /* two serial channels per zsc */
|
|
int hwflags;
|
|
};
|
|
#define ZS_HWFLAG_CONSOLE 1
|
|
|