1 /* $NetBSD: afsc.c,v 1.47 2023/08/27 08:15:13 andvar 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: afsc.c,v 1.47 2023/08/27 08:15:13 andvar 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 <machine/cpu.h>
72 #include <amiga/amiga/custom.h>
73 #include <amiga/amiga/cc.h>
74 #include <amiga/amiga/device.h>
75 #include <amiga/amiga/isr.h>
76 #include <amiga/dev/siopreg.h>
77 #include <amiga/dev/siopvar.h>
78 #include <amiga/dev/zbusvar.h>
79
80 #ifdef __powerpc__
81 #define badaddr(a) badaddr_read(a, 2, NULL)
82 #endif
83
84 void afscattach(device_t, device_t, void *);
85 int afscmatch(device_t, cfdata_t, void *);
86 int afsc_dmaintr(void *);
87 #ifdef DEBUG
88 void afsc_dump(void);
89 #endif
90
91 CFATTACH_DECL_NEW(afsc, sizeof(struct siop_softc),
92 afscmatch, afscattach, NULL, NULL);
93
94 CFATTACH_DECL_NEW(aftsc, sizeof(struct siop_softc),
95 afscmatch, afscattach, NULL, NULL);
96
97 /*
98 * if we are a Commodore Amiga A4091 or possibly an A4000T
99 */
100 int
afscmatch(device_t parent,cfdata_t cf,void * aux)101 afscmatch(device_t parent, cfdata_t cf, void *aux)
102 {
103 struct zbus_args *zap;
104 siop_regmap_p rp;
105 u_long temp, scratch;
106
107 zap = aux;
108 if (zap->manid == 514 && zap->prodid == 84)
109 return(1); /* It's an A4091 SCSI card */
110 if (!is_a4000() || !matchname("afsc", aux))
111 return(0); /* Not on an A4000 or not A4000T SCSI */
112 rp = ztwomap(0xdd0040);
113 if (badaddr((void *)__UNVOLATILE(&rp->siop_scratch)) ||
114 badaddr((void *)__UNVOLATILE(&rp->siop_temp))) {
115 return(0);
116 }
117 scratch = rp->siop_scratch;
118 temp = rp->siop_temp;
119 rp->siop_scratch = 0xdeadbeef;
120 rp->siop_temp = 0xaaaa5555;
121 if (rp->siop_scratch != 0xdeadbeef || rp->siop_temp != 0xaaaa5555)
122 return(0);
123 rp->siop_scratch = scratch;
124 rp->siop_temp = temp;
125 if (rp->siop_scratch != scratch || rp->siop_temp != temp)
126 return(0);
127 return(1);
128 }
129
130 void
afscattach(device_t parent,device_t self,void * aux)131 afscattach(device_t parent, device_t self, void *aux)
132 {
133 struct siop_softc *sc = device_private(self);
134 struct zbus_args *zap;
135 siop_regmap_p rp;
136 struct scsipi_adapter *adapt = &sc->sc_adapter;
137 struct scsipi_channel *chan = &sc->sc_channel;
138
139 printf("\n");
140
141 sc->sc_dev = self;
142 zap = aux;
143
144 if (zap->manid == 514 && zap->prodid == 84)
145 sc->sc_siopp = rp = (siop_regmap_p)((char *)zap->va +
146 0x00800000);
147 else
148 sc->sc_siopp = rp = ztwomap(0xdd0040);
149
150 /*
151 * CTEST7 = 80 [disable burst]
152 */
153 sc->sc_clock_freq = 50; /* Clock = 50 MHz */
154 sc->sc_ctest7 = SIOP_CTEST7_CDIS;
155 sc->sc_dcntl = SIOP_DCNTL_EA;
156
157 /*
158 * Fill in the scsipi_adapter.
159 */
160 memset(adapt, 0, sizeof(*adapt));
161 adapt->adapt_dev = self;
162 adapt->adapt_nchannels = 1;
163 adapt->adapt_openings = 7;
164 adapt->adapt_max_periph = 1;
165 adapt->adapt_request = siop_scsipi_request;
166 adapt->adapt_minphys = siop_minphys;
167
168 /*
169 * Fill in the scsipi_channel.
170 */
171 memset(chan, 0, sizeof(*chan));
172 chan->chan_adapter = adapt;
173 chan->chan_bustype = &scsi_bustype;
174 chan->chan_channel = 0;
175 chan->chan_ntargets = 8;
176 chan->chan_nluns = 8;
177 chan->chan_id = 7;
178
179 siopinitialize(sc);
180
181 sc->sc_isr.isr_intr = afsc_dmaintr;
182 sc->sc_isr.isr_arg = sc;
183 sc->sc_isr.isr_ipl = 2;
184 add_isr (&sc->sc_isr);
185
186 /*
187 * attach all scsi units on us
188 */
189 config_found(self, chan, scsiprint, CFARGS_NONE);
190 }
191
192 int
afsc_dmaintr(void * arg)193 afsc_dmaintr(void *arg)
194 {
195 struct siop_softc *sc = arg;
196 siop_regmap_p rp;
197 u_char istat;
198
199 if (sc->sc_flags & SIOP_INTSOFF)
200 return (0); /* interrupts are not active */
201 rp = sc->sc_siopp;
202 istat = rp->siop_istat;
203 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
204 return(0);
205 /*
206 * save interrupt status, DMA status, and SCSI status 0
207 * (may need to deal with stacked interrupts?)
208 */
209 sc->sc_sstat0 = rp->siop_sstat0;
210 sc->sc_istat = istat;
211 sc->sc_dstat = rp->siop_dstat;
212 siopintr(sc);
213 return(1);
214 }
215
216 #ifdef DEBUG
217 void
afsc_dump(void)218 afsc_dump(void)
219 {
220 extern struct cfdriver afsc_cd;
221 struct siop_softc *sc;
222 int i;
223
224 for (i = 0; i < afsc_cd.cd_ndevs; ++i) {
225 sc = device_lookup_private(&afsc_cd, i);
226 if (sc != NULL)
227 siop_dump(sc);
228 }
229 }
230 #endif
231