afsc.c revision 1.6 
1/*	$NetBSD: afsc.c,v 1.6 1995/02/12 19:19:00 chopps Exp $	*/
2
3/*
4 * Copyright (c) 1994 Michael L. Hitch
5 * Copyright (c) 1982, 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	@(#)dma.c
37 */
38
39#include <sys/param.h>
40#include <sys/systm.h>
41#include <sys/kernel.h>
42#include <sys/device.h>
43#include <scsi/scsi_all.h>
44#include <scsi/scsiconf.h>
45#include <amiga/amiga/custom.h>
46#include <amiga/amiga/cc.h>
47#include <amiga/amiga/device.h>
48#include <amiga/amiga/isr.h>
49#include <amiga/dev/siopreg.h>
50#include <amiga/dev/siopvar.h>
51#include <amiga/dev/zbusvar.h>
52
53int afscprint __P((void *auxp, char *));
54void afscattach __P((struct device *, struct device *, void *));
55int afscmatch __P((struct device *, struct cfdata *, void *));
56int siopintr __P((struct siop_softc *));
57int afsc_dmaintr __P((struct siop_softc *));
58
59struct scsi_adapter afsc_scsiswitch = {
60	siop_scsicmd,
61	siop_minphys,
62	0,			/* no lun support */
63	0,			/* no lun support */
64};
65
66struct scsi_device afsc_scsidev = {
67	NULL,		/* use default error handler */
68	NULL,		/* do not have a start functio */
69	NULL,		/* have no async handler */
70	NULL,		/* Use default done routine */
71};
72
73
74#ifdef DEBUG
75#endif
76
77struct cfdriver afsccd = {
78	NULL, "afsc", (cfmatch_t)afscmatch, afscattach,
79	DV_DULL, sizeof(struct siop_softc), NULL, 0 };
80
81/*
82 * if we are a Commodore Amiga A4091
83 */
84int
85afscmatch(pdp, cdp, auxp)
86	struct device *pdp;
87	struct cfdata *cdp;
88	void *auxp;
89{
90	struct zbus_args *zap;
91
92	zap = auxp;
93	if (zap->manid == 514 && zap->prodid == 84)
94		return(1);
95	return(0);
96}
97
98void
99afscattach(pdp, dp, auxp)
100	struct device *pdp, *dp;
101	void *auxp;
102{
103	struct siop_softc *sc;
104	struct zbus_args *zap;
105	siop_regmap_p rp;
106
107	printf("\n");
108
109	zap = auxp;
110
111	sc = (struct siop_softc *)dp;
112	sc->sc_siopp = rp = zap->va + 0x00800000;
113
114	/*
115	 * DCNTL = 37.51->50MHZ / SCLK/2
116	 * CTEST7 = 80 [disable burst]
117	 */
118	sc->sc_clock_freq = 0x8000;
119
120
121	siopinitialize(sc);
122
123	sc->sc_link.adapter_softc = sc;
124	sc->sc_link.adapter_target = 7;
125	sc->sc_link.adapter = &afsc_scsiswitch;
126	sc->sc_link.device = &afsc_scsidev;
127	sc->sc_link.openings = 1;
128	TAILQ_INIT(&sc->sc_xslist);
129
130	sc->sc_isr.isr_intr = afsc_dmaintr;
131	sc->sc_isr.isr_arg = sc;
132	sc->sc_isr.isr_ipl = 2;
133	add_isr (&sc->sc_isr);
134
135	/*
136	 * attach all scsi units on us
137	 */
138	config_found(dp, &sc->sc_link, afscprint);
139}
140
141/*
142 * print diag if pnp is NULL else just extra
143 */
144int
145afscprint(auxp, pnp)
146	void *auxp;
147	char *pnp;
148{
149	if (pnp == NULL)
150		return(UNCONF);
151	return(QUIET);
152}
153
154int
155afsc_dmaintr(sc)
156	struct siop_softc *sc;
157{
158	siop_regmap_p rp;
159	u_char istat;
160
161	rp = sc->sc_siopp;
162	istat = rp->siop_istat;
163	if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
164		return(0);
165	if ((rp->siop_sien | rp->siop_dien) == 0)
166		return(0);	/* no interrupts enabled */
167	/*
168	 * save interrupt status, DMA status, and SCSI status 0
169	 * (may need to deal with stacked interrupts?)
170	 */
171	sc->sc_istat = istat;
172	sc->sc_dstat = rp->siop_dstat;
173	sc->sc_sstat0 = rp->siop_sstat0;
174	siopintr(sc);
175	return(1);
176}
177