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
|
/* $OpenBSD: pcc.c,v 1.18 2010/06/26 23:24:43 guenther Exp $ */
/*
* Copyright (c) 1995 Theo de Raadt
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* VME147 peripheral channel controller
*/
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <sys/uio.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/fcntl.h>
#include <sys/device.h>
#include <machine/cpu.h>
#include <machine/autoconf.h>
#include <dev/cons.h>
#include <mvme68k/dev/pccreg.h>
struct pccsoftc {
struct device sc_dev;
vaddr_t sc_vaddr;
paddr_t sc_paddr;
struct pccreg *sc_pcc;
struct intrhand sc_nmiih;
};
void pccattach(struct device *, struct device *, void *);
int pccmatch(struct device *, void *, void *);
int pccabort(void *);
int pcc_print(void *, const char *);
int pcc_scan(struct device *, void *, void *);
struct cfattach pcc_ca = {
sizeof(struct pccsoftc), pccmatch, pccattach
};
struct cfdriver pcc_cd = {
NULL, "pcc", DV_DULL
};
struct pccreg *sys_pcc = NULL;
int
pccmatch(parent, vcf, args)
struct device *parent;
void *vcf, *args;
{
struct confargs *ca = args;
/* the pcc only exist on vme147's */
if (cputyp != CPU_147)
return (0);
return (!badvaddr(IIOV(ca->ca_paddr) + PCCSPACE_PCCCHIP_OFF, 1));
}
int
pcc_print(args, bus)
void *args;
const char *bus;
{
struct confargs *ca = args;
if (ca->ca_offset != -1)
printf(" offset 0x%x", ca->ca_offset);
if (ca->ca_ipl > 0)
printf(" ipl %d", ca->ca_ipl);
return (UNCONF);
}
int
pcc_scan(parent, child, args)
struct device *parent;
void *child, *args;
{
struct cfdata *cf = child;
struct pccsoftc *sc = (struct pccsoftc *)parent;
struct confargs *ca = args;
struct confargs oca;
bzero(&oca, sizeof oca);
oca.ca_iot = ca->ca_iot;
oca.ca_dmat = ca->ca_dmat;
oca.ca_offset = cf->cf_loc[0];
oca.ca_ipl = cf->cf_loc[1];
if (oca.ca_offset != -1) {
oca.ca_vaddr = sc->sc_vaddr + oca.ca_offset;
oca.ca_paddr = sc->sc_paddr + oca.ca_offset;
} else {
oca.ca_vaddr = (vaddr_t)-1;
oca.ca_paddr = (paddr_t)-1;
}
oca.ca_bustype = BUS_PCC;
oca.ca_name = cf->cf_driver->cd_name;
if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0)
return (0);
config_attach(parent, cf, &oca, pcc_print);
return (1);
}
void
pccattach(parent, self, args)
struct device *parent, *self;
void *args;
{
struct confargs *ca = args;
struct pccsoftc *sc = (struct pccsoftc *)self;
if (sys_pcc)
panic("pcc already attached!");
/*
* since we know ourself to land in intiobase land,
* we must adjust our address
*/
sc->sc_paddr = ca->ca_paddr;
sc->sc_vaddr = IIOV(sc->sc_paddr);
sc->sc_pcc = (struct pccreg *)(sc->sc_vaddr + PCCSPACE_PCCCHIP_OFF);
sys_pcc = sc->sc_pcc;
printf(": rev %d\n", sc->sc_pcc->pcc_chiprev);
sc->sc_nmiih.ih_fn = pccabort;
sc->sc_nmiih.ih_ipl = 7;
sc->sc_nmiih.ih_wantframe = 1;
pccintr_establish(PCCV_ABORT, &sc->sc_nmiih, self->dv_xname);
sc->sc_pcc->pcc_vecbase = PCC_VECBASE;
sc->sc_pcc->pcc_abortirq = PCC_ABORT_IEN | PCC_ABORT_ACK;
sc->sc_pcc->pcc_genctl |= PCC_GENCTL_IEN;
/* XXX further init of PCC chip? */
config_search(pcc_scan, self, args);
}
/*
* PCC interrupts land in a PCC_NVEC sized hole starting at PCC_VECBASE
*/
int
pccintr_establish(vec, ih, name)
int vec;
struct intrhand *ih;
const char *name;
{
#ifdef DIAGNOSTIC
if (vec < 0 || vec >= PCC_NVEC)
panic("pccintr_establish: illegal vector for %s: 0x%x",
name, vec);
#endif
return intr_establish(PCC_VECBASE + vec, ih, name);
}
int
pccabort(frame)
void *frame;
{
#if 0
/* XXX wait for it to debounce -- there is something wrong here */
while (sys_pcc->pcc_abortirq & PCC_ABORT_ABS)
;
delay(2);
#endif
sys_pcc->pcc_abortirq = PCC_ABORT_IEN | PCC_ABORT_ACK;
nmihand(frame);
return (1);
}
int
pccspeed(pcc)
struct pccreg *pcc;
{
volatile u_short lim = pcc_timer_us2lim(400);
volatile u_short tmp;
volatile int cnt;
int speed;
pcc->pcc_t1irq = 0; /* just in case */
pcc->pcc_t1pload = 0;
pcc->pcc_t1ctl = PCC_TIMERCLEAR;
pcc->pcc_t1ctl = PCC_TIMERSTART;
cnt = 0;
for (;;) {
tmp = pcc->pcc_t1count;
if (tmp > lim)
break;
tmp = lim;
cnt++;
}
pcc->pcc_t1ctl = PCC_TIMERCLEAR;
printf("pccspeed cnt=%d\n", cnt);
/*
* Empirically determined. Unfortunately, because of various
* memory board effects and such, it is rather unlikely that
* we will find a nice formula.
*/
if (cnt > 280000)
speed = 50;
else if (cnt > 210000)
speed = 33;
else if (cnt > 190000)
speed = 25;
else if (cnt > 170000) /* 171163, 170335 */
speed = 20;
else
speed = 16;
return (speed);
}
|
