1 /* $NetBSD: zssc.c,v 1.48 2021/08/07 16:18:42 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1982, 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)dma.c
32 */
33
34 /*
35 * Copyright (c) 1994 Michael L. Hitch
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
47 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
48 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
49 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
50 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
51 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
52 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
53 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
54 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
55 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 *
57 * @(#)dma.c
58 */
59
60 #include <sys/cdefs.h>
61 __KERNEL_RCSID(0, "$NetBSD: zssc.c,v 1.48 2021/08/07 16:18:42 thorpej Exp $");
62
63 #include <sys/param.h>
64 #include <sys/systm.h>
65 #include <sys/kernel.h>
66 #include <sys/device.h>
67
68 #include <dev/scsipi/scsi_all.h>
69 #include <dev/scsipi/scsipi_all.h>
70 #include <dev/scsipi/scsiconf.h>
71 #include <amiga/amiga/custom.h>
72 #include <amiga/amiga/cc.h>
73 #include <amiga/amiga/device.h>
74 #include <amiga/amiga/isr.h>
75 #include <amiga/dev/siopreg.h>
76 #include <amiga/dev/siopvar.h>
77 #include <amiga/dev/zbusvar.h>
78
79 void zsscattach(device_t, device_t, void *);
80 int zsscmatch(device_t, cfdata_t, void *);
81 int zssc_dmaintr(void *);
82 #ifdef DEBUG
83 void zssc_dump(void);
84 #endif
85
86 CFATTACH_DECL_NEW(zssc, sizeof(struct siop_softc),
87 zsscmatch, zsscattach, NULL, NULL);
88
89 /*
90 * if we are an PPI Zeus
91 */
92 int
zsscmatch(device_t parent,cfdata_t cf,void * aux)93 zsscmatch(device_t parent, cfdata_t cf, void *aux)
94 {
95 struct zbus_args *zap;
96
97 zap = aux;
98 if (zap->manid == 2026 && zap->prodid == 150)
99 return(1);
100 return(0);
101 }
102
103 void
zsscattach(device_t parent,device_t self,void * aux)104 zsscattach(device_t parent, device_t self, void *aux)
105 {
106 struct siop_softc *sc = device_private(self);
107 struct zbus_args *zap;
108 siop_regmap_p rp;
109
110 printf("\n");
111
112 sc->sc_dev = self;
113 zap = aux;
114
115 sc->sc_siopp = rp = (siop_regmap_p)((char *)zap->va + 0x4000);
116
117 /*
118 * CTEST7 = 00
119 */
120 sc->sc_clock_freq = 66; /* Clock = 66 MHz */
121 sc->sc_ctest7 = 0x00;
122 sc->sc_dcntl = 0x00;
123
124 sc->sc_siop_si = softint_establish(SOFTINT_BIO,
125 (void (*)(void *))siopintr, sc);
126
127 sc->sc_adapter.adapt_dev = self;
128 sc->sc_adapter.adapt_nchannels = 1;
129 sc->sc_adapter.adapt_openings = 7;
130 sc->sc_adapter.adapt_max_periph = 1;
131 sc->sc_adapter.adapt_ioctl = NULL;
132 sc->sc_adapter.adapt_minphys = siop_minphys;
133 sc->sc_adapter.adapt_request = siop_scsipi_request;
134
135 sc->sc_channel.chan_adapter = &sc->sc_adapter;
136 sc->sc_channel.chan_bustype = &scsi_bustype;
137 sc->sc_channel.chan_channel = 0;
138 sc->sc_channel.chan_ntargets = 8;
139 sc->sc_channel.chan_nluns = 8;
140 sc->sc_channel.chan_id = 7;
141
142 siopinitialize(sc);
143
144 sc->sc_isr.isr_intr = zssc_dmaintr;
145 sc->sc_isr.isr_arg = sc;
146 sc->sc_isr.isr_ipl = 6;
147 add_isr(&sc->sc_isr);
148
149 /*
150 * attach all scsi units on us
151 */
152 config_found(self, &sc->sc_channel, scsiprint, CFARGS_NONE);
153 }
154
155 /*
156 * Level 6 interrupt processing for the Progressive Peripherals Inc
157 * Zeus SCSI. Because the level 6 interrupt is above splbio, the
158 * interrupt status is saved and a softint scheduled. This way,
159 * the actual processing of the interrupt can be deferred until
160 * splbio is unblocked.
161 */
162
163 int
zssc_dmaintr(void * arg)164 zssc_dmaintr(void *arg)
165 {
166 struct siop_softc *sc = arg;
167 siop_regmap_p rp;
168 int istat;
169
170 if (sc->sc_flags & SIOP_INTSOFF)
171 return (0); /* interrupts are not active */
172 rp = sc->sc_siopp;
173 istat = rp->siop_istat;
174 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
175 return(0);
176 /*
177 * save interrupt status, DMA status, and SCSI status 0
178 * (may need to deal with stacked interrupts?)
179 */
180 sc->sc_sstat0 = rp->siop_sstat0;
181 sc->sc_istat = istat;
182 sc->sc_dstat = rp->siop_dstat;
183 /*
184 * disable interrupts until the callback can process this
185 * interrupt.
186 */
187 rp->siop_sien = 0;
188 rp->siop_dien = 0;
189 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF;
190 softint_schedule(sc->sc_siop_si);
191 return(1);
192 }
193
194 #ifdef DEBUG
195 void
zssc_dump(void)196 zssc_dump(void)
197 {
198 extern struct cfdriver zssc_cd;
199 struct siop_softc *sc;
200 int i;
201
202 for (i = 0; i < zssc_cd.cd_ndevs; ++i) {
203 sc = device_lookup_private(&zssc_cd, i);
204 if (sc != NULL)
205 siop_dump(sc);
206 }
207 }
208 #endif
209