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
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
|
/* $OpenBSD: ppi.c,v 1.15 2006/01/19 23:54:41 miod Exp $ */
/* $NetBSD: ppi.c,v 1.13 1997/04/02 22:37:33 scottr Exp $ */
/*
* Copyright (c) 1996, 1997 Jason R. Thorpe. All rights reserved.
* Copyright (c) 1982, 1990, 1993
* 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. 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.
*
* @(#)ppi.c 8.1 (Berkeley) 6/16/93
*/
/*
* Printer/Plotter HPIB interface
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/timeout.h>
#include <sys/uio.h>
#include <hp300/dev/hpibvar.h>
#include <hp300/dev/ppiioctl.h>
struct ppi_softc {
struct device sc_dev;
int sc_flags;
struct hpibqueue sc_hq; /* HP-IB job queue entry */
struct ppiparam sc_param;
#define sc_burst sc_param.burst
#define sc_timo sc_param.timo
#define sc_delay sc_param.delay
int sc_sec;
int sc_slave; /* HP-IB slave address */
struct timeout sc_to; /* ppitimo timeout */
struct timeout sc_start_to; /* ppistart timeout */
};
/* sc_flags values */
#define PPIF_ALIVE 0x01
#define PPIF_OPEN 0x02
#define PPIF_UIO 0x04
#define PPIF_TIMO 0x08
#define PPIF_DELAY 0x10
int ppimatch(struct device *, void *, void *);
void ppiattach(struct device *, struct device *, void *);
struct cfattach ppi_ca = {
sizeof(struct ppi_softc), ppimatch, ppiattach
};
struct cfdriver ppi_cd = {
NULL, "ppi", DV_DULL
};
void ppistart(void *);
void ppinoop(void *);
void ppitimo(void *);
int ppirw(dev_t, struct uio *);
int ppihztoms(int);
int ppimstohz(int);
bdev_decl(ppi);
cdev_decl(ppi);
#define UNIT(x) minor(x)
#ifdef DEBUG
int ppidebug = 0x80;
#define PDB_FOLLOW 0x01
#define PDB_IO 0x02
#define PDB_NOCHECK 0x80
#endif
int
ppimatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct cfdata *cf = match;
struct hpibbus_attach_args *ha = aux;
/*
* The printer/plotter doesn't return an ID tag.
* The check below prevents us from matching a CS80
* device by mistake.
*/
if (ha->ha_id & 0x200)
return (0);
/*
* To prevent matching all unused slots on the bus, we
* don't allow wildcarded locators.
*/
if (cf->hpibbuscf_slave == HPIBBUS_SLAVE_UNK ||
cf->hpibbuscf_punit == HPIBBUS_PUNIT_UNK)
return (0);
return (1);
}
void
ppiattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ppi_softc *sc = (struct ppi_softc *)self;
struct hpibbus_attach_args *ha = aux;
printf("\n");
sc->sc_slave = ha->ha_slave;
/* Initialize the hpib queue entry. */
sc->sc_hq.hq_softc = sc;
sc->sc_hq.hq_slave = sc->sc_slave;
sc->sc_hq.hq_start = ppistart;
sc->sc_hq.hq_go = ppinoop;
sc->sc_hq.hq_intr = ppinoop;
sc->sc_flags = PPIF_ALIVE;
/* Initialize timeout structures */
timeout_set(&sc->sc_to, ppitimo, sc);
timeout_set(&sc->sc_to, ppistart, sc);
}
void
ppinoop(arg)
void *arg;
{
/* Noop! */
}
int
ppiopen(dev, flags, fmt, p)
dev_t dev;
int flags, fmt;
struct proc *p;
{
int unit = UNIT(dev);
struct ppi_softc *sc;
if (unit >= ppi_cd.cd_ndevs ||
(sc = ppi_cd.cd_devs[unit]) == NULL ||
(sc->sc_flags & PPIF_ALIVE) == 0)
return (ENXIO);
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppiopen(%x, %x): flags %x\n",
dev, flags, sc->sc_flags);
#endif
if (sc->sc_flags & PPIF_OPEN)
return (EBUSY);
sc->sc_flags |= PPIF_OPEN;
sc->sc_burst = PPI_BURST;
sc->sc_timo = ppimstohz(PPI_TIMO);
sc->sc_delay = ppimstohz(PPI_DELAY);
sc->sc_sec = -1;
return(0);
}
int
ppiclose(dev, flags, fmt, p)
dev_t dev;
int flags, fmt;
struct proc *p;
{
int unit = UNIT(dev);
struct ppi_softc *sc = ppi_cd.cd_devs[unit];
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppiclose(%x, %x): flags %x\n",
dev, flags, sc->sc_flags);
#endif
sc->sc_flags &= ~PPIF_OPEN;
return(0);
}
void
ppistart(arg)
void *arg;
{
struct ppi_softc *sc = arg;
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppistart(%x)\n", sc->sc_dev.dv_unit);
#endif
sc->sc_flags &= ~PPIF_DELAY;
wakeup(sc);
}
void
ppitimo(arg)
void *arg;
{
struct ppi_softc *sc = arg;
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppitimo(%x)\n", sc->sc_dev.dv_unit);
#endif
sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO);
wakeup(sc);
}
int
ppiread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppiread(%x, %p)\n", dev, uio);
#endif
return (ppirw(dev, uio));
}
int
ppiwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppiwrite(%x, %p)\n", dev, uio);
#endif
return (ppirw(dev, uio));
}
int
ppirw(dev, uio)
dev_t dev;
struct uio *uio;
{
int unit = UNIT(dev);
struct ppi_softc *sc = ppi_cd.cd_devs[unit];
int s, len, cnt;
char *cp;
int error = 0, gotdata = 0;
int buflen, ctlr, slave;
char *buf;
if (uio->uio_resid == 0)
return(0);
ctlr = sc->sc_dev.dv_parent->dv_unit;
slave = sc->sc_slave;
#ifdef DEBUG
if (ppidebug & (PDB_FOLLOW|PDB_IO))
printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n",
dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W',
sc->sc_burst, sc->sc_timo, uio->uio_resid);
#endif
buflen = min(sc->sc_burst, uio->uio_resid);
buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK);
sc->sc_flags |= PPIF_UIO;
if (sc->sc_timo > 0) {
sc->sc_flags |= PPIF_TIMO;
timeout_add(&sc->sc_to, sc->sc_timo);
}
len = cnt = 0;
while (uio->uio_resid > 0) {
len = min(buflen, uio->uio_resid);
cp = buf;
if (uio->uio_rw == UIO_WRITE) {
error = uiomove(cp, len, uio);
if (error)
break;
}
again:
s = splbio();
if ((sc->sc_flags & PPIF_UIO) &&
hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq) == 0)
tsleep(sc, PRIBIO+1, "ppirw", 0);
/*
* Check if we timed out during sleep or uiomove
*/
if ((sc->sc_flags & PPIF_UIO) == 0) {
#ifdef DEBUG
if (ppidebug & PDB_IO)
printf("ppirw: uiomove/sleep timo, flags %x\n",
sc->sc_flags);
#endif
if (sc->sc_flags & PPIF_TIMO) {
timeout_del(&sc->sc_to);
sc->sc_flags &= ~PPIF_TIMO;
}
splx(s);
break;
}
/*
* Perform the operation
*/
if (uio->uio_rw == UIO_WRITE)
cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len);
else
cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len);
hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq);
#ifdef DEBUG
if (ppidebug & PDB_IO)
printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n",
uio->uio_rw == UIO_READ ? "recv" : "send",
ctlr, slave, sc->sc_sec, cp, len, cnt);
#endif
if (uio->uio_rw == UIO_READ) {
if (cnt) {
error = uiomove(cp, cnt, uio);
if (error) {
splx(s);
break;
}
gotdata++;
}
/*
* Didn't get anything this time, but did in the past.
* Consider us done.
*/
else if (gotdata) {
splx(s);
break;
}
}
/*
* Operation timeout (or non-blocking), quit now.
*/
if ((sc->sc_flags & PPIF_UIO) == 0) {
#ifdef DEBUG
if (ppidebug & PDB_IO)
printf("ppirw: timeout/done\n");
#endif
splx(s);
break;
}
/*
* Implement inter-read delay
*/
if (sc->sc_delay > 0) {
sc->sc_flags |= PPIF_DELAY;
timeout_add(&sc->sc_start_to, sc->sc_delay);
error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0);
if (error) {
splx(s);
break;
}
}
/*
* Must not call uiomove again til we've used all data
* that we already grabbed.
*/
if (uio->uio_rw == UIO_WRITE && cnt != len) {
cp += cnt;
len -= cnt;
cnt = 0;
splx(s);
goto again;
}
splx(s);
}
if (sc->sc_flags & PPIF_TIMO) {
timeout_del(&sc->sc_to);
sc->sc_flags &= ~PPIF_TIMO;
}
if (sc->sc_flags & PPIF_DELAY) {
timeout_del(&sc->sc_start_to);
sc->sc_flags &= ~PPIF_DELAY;
}
/*
* Adjust for those chars that we uiomove'ed but never wrote
*/
if (uio->uio_rw == UIO_WRITE && cnt != len) {
uio->uio_resid += (len - cnt);
#ifdef DEBUG
if (ppidebug & PDB_IO)
printf("ppirw: short write, adjust by %d\n",
len-cnt);
#endif
}
free(buf, M_DEVBUF);
#ifdef DEBUG
if (ppidebug & (PDB_FOLLOW|PDB_IO))
printf("ppirw: return %d, resid %d\n", error, uio->uio_resid);
#endif
return (error);
}
int
ppiioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct ppi_softc *sc = ppi_cd.cd_devs[UNIT(dev)];
struct ppiparam *pp, *upp;
int tmp;
int error = 0;
switch (cmd) {
case PPIIOCGPARAM:
pp = &sc->sc_param;
upp = (struct ppiparam *)data;
upp->burst = pp->burst;
upp->timo = ppihztoms(pp->timo);
upp->delay = ppihztoms(pp->delay);
break;
case PPIIOCSPARAM:
pp = &sc->sc_param;
upp = (struct ppiparam *)data;
if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX ||
upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX)
return(EINVAL);
pp->burst = upp->burst;
pp->timo = ppimstohz(upp->timo);
pp->delay = ppimstohz(upp->delay);
break;
case PPIIOCSSEC:
tmp = *(int *)data;
if (tmp == -1 || (tmp >= 0 && tmp <= 0x1f))
sc->sc_sec = tmp;
else
error = EINVAL;
break;
default:
return (ENOTTY);
}
return (error);
}
int
ppihztoms(h)
int h;
{
int m = h;
if (m > 0)
m = m * 1000 / hz;
return(m);
}
int
ppimstohz(m)
int m;
{
int h = m;
if (h > 0) {
h = h * hz / 1000;
if (h == 0)
h = 1000 / hz;
}
return(h);
}
|