Annotation of sys/dev/ic/z8530sc.h, Revision 1.1.1.1
1.1 nbrk 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 *);
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