1 /* $OpenBSD: z8530sc.h,v 1.10 2003/06/02 23:28:02 millert Exp $ */
2 /* $NetBSD: z8530sc.h,v 1.4 1996/10/16 20:34:54 gwr Exp $ */
3
4 /*
5 * Copyright (c) 1994 Gordon W. Ross
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * This software was developed by the Computer Systems Engineering group
10 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
11 * contributed to Berkeley.
12 *
13 * All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Lawrence Berkeley Laboratory.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 3. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * SUCH DAMAGE.
41 *
42 * @(#)zsvar.h 8.1 (Berkeley) 6/11/93
43 */
44
45
46 /*
47 * Software state, per zs channel.
48 */
49 struct zs_chanstate {
50
51 /* Pointers to the device registers. */
52 volatile u_char *cs_reg_csr; /* ctrl, status, and reg. number. */
53 volatile u_char *cs_reg_data; /* data or numbered register */
54
55 int cs_channel; /* sub-unit number */
56 void *cs_private; /* sub-driver data pointer */
57 struct zsops *cs_ops;
58
59 int cs_brg_clk; /* BAUD Rate Generator clock
60 * (usually PCLK / 16) */
61 int cs_defspeed; /* default baud rate (from PROM) */
62
63 /*
64 * We must keep a copy of the write registers as they are
65 * mostly write-only and we sometimes need to set and clear
66 * individual bits (e.g., in WR3). Not all of these are
67 * needed but 16 bytes is cheap and this makes the addressing
68 * simpler. Unfortunately, we can only write to some registers
69 * when the chip is not actually transmitting, so whenever
70 * we are expecting a `transmit done' interrupt the preg array
71 * is allowed to `get ahead' of the current values. In a
72 * few places we must change the current value of a register,
73 * rather than (or in addition to) the pending value; for these
74 * cs_creg[] contains the current value.
75 */
76 u_char cs_creg[16]; /* current values */
77 u_char cs_preg[16]; /* pending values */
78
79 u_char cs_heldchange; /* change pending (creg != preg) */
80 u_char cs_rr0; /* last rr0 processed */
81 u_char cs_rr0_delta; /* rr0 changes at status intr. */
82
83 char cs_softreq; /* need soft interrupt call */
84 };
85
86 /*
87 * Function vector - per channel
88 */
89 struct zsops {
90 /* receive char available */
91 void (*zsop_rxint)(register struct zs_chanstate *);
92
93 /* external/status */
94 void (*zsop_stint)(register struct zs_chanstate *);
95
96 /* xmit buffer empty */
97 void (*zsop_txint)(register struct zs_chanstate *);
98
99 /* process software interrupt */
100 void (*zsop_softint)(struct zs_chanstate *);
101 };
102
103 extern struct zsops zsops_null;
104
105 struct zsc_attach_args {
106 int channel; /* two serial channels per zsc */
107 int hwflags;
108 };
109 #define ZS_HWFLAG_CONSOLE 1
110
111 int zsc_intr_hard(void *);
112 int zsc_intr_soft(void *);
113 void zs_break(struct zs_chanstate *, int);
114 int zs_getspeed(struct zs_chanstate *);
115 void zs_iflush(struct zs_chanstate *);
116 void zs_loadchannelregs(struct zs_chanstate *);