1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
/* $OpenBSD: sshdma.c,v 1.6 2001/09/23 02:50:25 miod Exp $ */
/*
* Copyright (c) 1996 Nivas Madhur
* Copyright (c) 1995 Theo de Raadt
* Copyright (c) 1994 Michael L. Hitch
* Copyright (c) 1982, 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)dma.c
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <uvm/uvm_extern.h>
#include <machine/autoconf.h>
#include <machine/board.h>
#include <machine/mmu.h>
#include <machine/pmap.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <mvme88k/dev/sshreg.h>
#include <mvme88k/dev/sshvar.h>
#include "pcctwo.h"
#if NPCCTWO > 0
#include <mvme88k/dev/pcctwofunc.h>
#include <mvme88k/dev/pcctworeg.h>
#endif
int afscmatch __P((struct device *, void *, void *));
void afscattach __P((struct device *, struct device *, void *));
int afscprint __P((void *auxp, char *));
int sshintr __P((struct ssh_softc *));
int afsc_dmaintr __P((void *));
void sshinitialize __P((struct ssh_softc *));
struct scsi_adapter afsc_scsiswitch = {
ssh_scsicmd,
ssh_minphys,
0, /* no lun support */
0, /* no lun support */
};
struct scsi_device afsc_scsidev = {
NULL, /* use default error handler */
NULL, /* do not have a start function */
NULL, /* have no async handler */
NULL, /* Use default done routine */
};
struct cfattach ssh_ca = {
sizeof(struct ssh_softc), afscmatch, afscattach,
};
struct cfdriver ssh_cd = {
NULL, "ssh", DV_DULL, 0
};
int
afscmatch(pdp, vcf, args)
struct device *pdp;
void *vcf, *args;
{
struct confargs *ca = args;
int ret;
if ((ret = badvaddr((vm_offset_t)IIOV(ca->ca_vaddr), 4)) <=0){
printf("==> ssh: failed address check returning %ld.\n", ret);
return(0);
}
return (1);
}
void
afscattach(parent, self, auxp)
struct device *parent, *self;
void *auxp;
{
struct ssh_softc *sc = (struct ssh_softc *)self;
struct confargs *ca = auxp;
ssh_regmap_p rp;
int tmp;
extern int cpuspeed;
sc->sc_sshp = rp = ca->ca_vaddr;
/*
* ssh uses sc_clock_freq to define the dcntl & ctest7 reg values
* (was 0x0221, but i added SSH_CTEST7_SC0 for snooping control)
* XXX does the clock frequency change for the 33MHz processors?
*/
sc->sc_clock_freq = cpuspeed * 2;
sc->sc_dcntl = SSH_DCNTL_EA;
/*X*/ if (sc->sc_clock_freq <= 25)
/*X*/ sc->sc_dcntl |= (2 << 6);
/*X*/ else if (sc->sc_clock_freq <= 37)
/*X*/ sc->sc_dcntl |= (1 << 6);
/*X*/ else if (sc->sc_clock_freq <= 50)
/*X*/ sc->sc_dcntl |= (0 << 6);
/*X*/ else
/*X*/ sc->sc_dcntl |= (3 << 6);
sc->sc_ctest0 = SSH_CTEST0_BTD | SSH_CTEST0_EAN;
/*
* MVME187 doesn't implement snooping...
*/
sc->sc_ctest7 = SSH_CTEST7_TT1;
sc->sc_link.adapter_softc = sc;
sc->sc_link.adapter_target = 7; /* XXXX should ask ROM */
sc->sc_link.adapter = &afsc_scsiswitch;
sc->sc_link.device = &afsc_scsidev;
sc->sc_link.openings = 1;
sc->sc_ih.ih_fn = afsc_dmaintr;
sc->sc_ih.ih_arg = sc;
sc->sc_ih.ih_wantframe = 0;
sc->sc_ih.ih_ipl = ca->ca_ipl;
sshinitialize(sc);
switch (ca->ca_bustype) {
#if NPCCTWO > 0
case BUS_PCCTWO:
{
/*
* Disable caching for the softc. Actually, I want
* to disable cache for acb structures, but they are
* part of softc, and I am disabling the entire softc
* just in case.
*/
struct pcctworeg *pcc2 = (struct pcctworeg *)ca->ca_master;
pmap_cache_ctrl(pmap_kernel(), trunc_page((vm_offset_t)sc),
round_page((vm_offset_t)sc + sizeof(*sc)),
CACHE_INH);
pcctwointr_establish(PCC2V_NCR, &sc->sc_ih);
/* intr_establish(PCC2_VECT + SCSIIRQ, &sc->sc_ih);*/
/* enable interrupts at ca_ipl */
pcc2->pcc2_ncrirq = ca->ca_ipl | PCC2_IRQ_IEN;
/* pcc2->pcc2_scsiirq = ca->ca_ipl | PCC2_SCSIIRQ_IEN;*/
break;
}
#endif
}
evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt);
/*
* attach all scsi units on us, watching for boot device
* (see dk_establish).
*/
tmp = bootpart;
if (ca->ca_paddr != bootaddr)
bootpart = -1; /* invalid flag to dk_establish */
config_found(self, &sc->sc_link, scsiprint);
bootpart = tmp; /* restore old value */
}
/*
* print diag if pnp is NULL else just extra
*/
int
afscprint(auxp, pnp)
void *auxp;
char *pnp;
{
if (pnp == NULL)
return (UNCONF);
return (QUIET);
}
int
afsc_dmaintr(arg)
void *arg;
{
struct ssh_softc *sc = arg;
ssh_regmap_p rp;
u_char istat;
rp = sc->sc_sshp;
istat = rp->ssh_istat;
if ((istat & (SSH_ISTAT_SIP | SSH_ISTAT_DIP)) == 0)
return (0);
if ((rp->ssh_sien | rp->ssh_dien) == 0)
return (0); /* no interrupts enabled */
/*
* 53c710 manual recommends reading dstat and sstat0 at least
* 12 clk cycles apart if reading as bytes (which is what
* pcc2 permits). Stick in a 1us delay between accessing dstat and
* sstat0 below.
*
* save interrupt status, DMA status, and SCSI status 0
* (may need to deal with stacked interrupts?)
*/
sc->sc_istat = istat;
if (istat & SSH_ISTAT_SIP) {
sc->sc_sstat0 = rp->ssh_sstat0;
}
if (istat & SSH_ISTAT_DIP) {
delay(3);
sc->sc_dstat = rp->ssh_dstat;
}
sshintr(sc);
sc->sc_intrcnt.ev_count++;
return (1);
}
#ifdef XXX_CD_DEBUG /* XXXsmurph What is afsccd ?? */
void
afsc_dump()
{
int i;
for (i = 0; i < afsccd.cd_ndevs; ++i)
if (afsccd.cd_devs[i])
ssh_dump(afsccd.cd_devs[i]);
}
#endif
|
