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/* $OpenBSD: z8530sc.h,v 1.10 2003/06/02 23:28:02 millert Exp $ */
/* $NetBSD: z8530sc.h,v 1.4 1996/10/16 20:34:54 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. 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
*/
/*
* 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_brg_clk; /* BAUD Rate Generator clock
* (usually 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 */
u_char cs_rr0_delta; /* rr0 changes at status intr. */
char cs_softreq; /* need soft interrupt call */
};
/*
* Function vector - per channel
*/
struct zsops {
/* receive char available */
void (*zsop_rxint)(register struct zs_chanstate *);
/* external/status */
void (*zsop_stint)(register struct zs_chanstate *);
/* xmit buffer empty */
void (*zsop_txint)(register struct zs_chanstate *);
/* process software interrupt */
void (*zsop_softint)(struct zs_chanstate *);
};
extern struct zsops zsops_null;
struct zsc_attach_args {
int channel; /* two serial channels per zsc */
int hwflags;
};
#define ZS_HWFLAG_CONSOLE 1
int zsc_intr_hard(void *);
int zsc_intr_soft(void *);
void zs_break(struct zs_chanstate *, int);
int zs_getspeed(struct zs_chanstate *);
void zs_iflush(struct zs_chanstate *);
void zs_loadchannelregs(struct zs_chanstate *);
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