LINT build test. Aggregated source code adjustments to bring most of the
[dragonfly.git] / sys / dev / video / gsc / gsc.c
CommitLineData
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1/* gsc.c - device driver for handy scanners
2 *
3 * Current version supports:
4 *
5 * - Genius GS-4500
6 *
7 * Copyright (c) 1995 Gunther Schadow. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Gunther Schadow.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 * $FreeBSD: src/sys/i386/isa/gsc.c,v 1.35.2.1 2000/08/08 19:49:53 peter Exp $
7b95be2a 35 * $DragonFly: src/sys/dev/video/gsc/gsc.c,v 1.5 2003/07/21 07:57:44 dillon Exp $
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36 *
37 */
38
39#include "gsc.h"
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/conf.h>
43#include <sys/buf.h>
44#include <sys/malloc.h>
45#include <sys/kernel.h>
46#include <sys/uio.h>
47
48#include <machine/gsc.h>
49
50#include <i386/isa/isa.h>
51#include <i386/isa/isa_device.h>
52#include <i386/isa/gscreg.h>
53
54/***********************************************************************
55 *
56 * CONSTANTS & DEFINES
57 *
58 ***********************************************************************/
59
60#define PROBE_FAIL 0
61#define PROBE_SUCCESS IO_GSCSIZE
62#define ATTACH_FAIL 0
63#define ATTACH_SUCCESS 1
64#define SUCCESS 0
65#define FAIL -1
66#define INVALID FAIL
67
68#define DMA1_READY 0x08
69
70#ifdef GSCDEBUG
71#define lprintf(args) \
72 do { \
73 if (scu->flags & FLAG_DEBUG) \
74 printf args; \
75 } while (0)
76#else
77#define lprintf(args)
78#endif
79
80#define MIN(a, b) (((a) < (b)) ? (a) : (b))
81
82#define TIMEOUT (hz*15) /* timeout while reading a buffer - default value */
83#define LONG (hz/60) /* timesteps while reading a buffer */
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84
85/***********************************************************************
86 *
87 * LAYOUT OF THE MINOR NUMBER
88 *
89 ***********************************************************************/
90
91#define UNIT_MASK 0xc0 /* unit gsc0 .. gsc3 */
92#define UNIT(x) (x >> 6)
93#define DBUG_MASK 0x20
94#define FRMT_MASK 0x18 /* output format */
95#define FRMT_RAW 0x00 /* output bits as read from scanner */
96#define FRMT_GRAY 0x10 /* output graymap (not implemented yet) */
97#define FRMT_PBM 0x08 /* output pbm format */
98#define FRMT_PGM 0x18
99
100/***********************************************************************
101 *
102 * THE GEMOMETRY TABLE
103 *
104 ***********************************************************************/
105
106#define GEOMTAB_SIZE 7
107
108static const struct gsc_geom {
109 int dpi; /* dots per inch */
110 int dpl; /* dots per line */
111 int g_res; /* get resolution value (status flag) */
112 int s_res; /* set resolution value (control register) */
113} geomtab[GEOMTAB_SIZE] = {
114 { 100, 424, GSC_RES_100, GSC_CNT_424},
115 { 200, 840, GSC_RES_200, GSC_CNT_840},
116 { 300, 1264, GSC_RES_300, GSC_CNT_1264},
117 { 400, 1648, GSC_RES_400, GSC_CNT_1648},
118 { -1, 1696, -1, GSC_CNT_1696},
119 { -2, 2644, -2, GSC_CNT_2544},
120 { -3, 3648, -3, GSC_CNT_3648},
121};
122
123#define NEW_GEOM { INVALID, INVALID, INVALID, INVALID }
124
125/***********************************************************************
126 *
127 * THE TABLE OF UNITS
128 *
129 ***********************************************************************/
130
131struct _sbuf {
132 size_t size;
133 size_t poi;
134 char *base;
135};
136
137struct gsc_unit {
138 int channel; /* DMA channel */
139 int data; /* - video port */
140 int stat; /* - status port */
141 int ctrl; /* - control port */
142 int clrp; /* - clear port */
143 int flags;
144#define ATTACHED 0x01
145#define OPEN 0x02
146#define READING 0x04
147#define EOF 0x08
148#define FLAG_DEBUG 0x10
149#define PBM_MODE 0x20
150 int geometry; /* resolution as geomtab index */
151 int blen; /* length of buffer in lines */
152 int btime; /* timeout of buffer in seconds/hz */
153 struct _sbuf sbuf;
154 char ctrl_byte; /* the byte actually written to ctrl port */
155 int height; /* height, for pnm modes */
156 size_t bcount; /* bytes to read, for pnm modes */
157 struct _sbuf hbuf; /* buffer for pnm header data */
158};
159
160static struct gsc_unit unittab[NGSC];
161
162/* I could not find a reasonable buffer size limit other than by
163 * experiments. MAXPHYS is obviously too much, while DEV_BSIZE and
164 * PAGE_SIZE are really too small. There must be something wrong
165 * with isa_dmastart/isa_dmarangecheck HELP!!!
166 */
167#define MAX_BUFSIZE 0x3000
168#define DEFAULT_BLEN 59
169
170/***********************************************************************
171 *
172 * THE PER-DRIVER RECORD FOR ISA.C
173 *
174 ***********************************************************************/
175
176static int gscprobe (struct isa_device *isdp);
177static int gscattach(struct isa_device *isdp);
178
179struct isa_driver gscdriver = { gscprobe, gscattach, "gsc" };
180
181static d_open_t gscopen;
182static d_close_t gscclose;
183static d_read_t gscread;
184static d_ioctl_t gscioctl;
185
186#define CDEV_MAJOR 47
187static struct cdevsw gsc_cdevsw = {
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188 /* name */ "gsc",
189 /* maj */ CDEV_MAJOR,
190 /* flags */ 0,
191 /* port */ NULL,
192 /* autoq */ 0,
193
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194 /* open */ gscopen,
195 /* close */ gscclose,
196 /* read */ gscread,
197 /* write */ nowrite,
198 /* ioctl */ gscioctl,
199 /* poll */ nopoll,
200 /* mmap */ nommap,
201 /* strategy */ nostrategy,
984263bc 202 /* dump */ nodump,
fabb8ceb 203 /* psize */ nopsize
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204};
205
206
207/***********************************************************************
208 *
209 * LOCALLY USED SUBROUTINES
210 *
211 ***********************************************************************/
212
213/***********************************************************************
214 *
215 * lookup_geometry -- lookup a record in the geometry table by pattern
216 *
217 * The caller supplies a geometry record pattern, where INVALID
218 * matches anything. Returns the index in the table or INVALID if
219 * lookup fails.
220 */
221
222static int
223lookup_geometry(struct gsc_geom geom, const struct gsc_unit *scu)
224{
225 struct gsc_geom tab;
226 int i;
227
228 for(i=0; i<GEOMTAB_SIZE; i++)
229 {
230 tab = geomtab[i];
231
232 if ( ( ( geom.dpi != INVALID ) && ( tab.dpi == geom.dpi ) ) ||
233 ( ( geom.dpl != INVALID ) && ( tab.dpl == geom.dpl ) ) ||
234 ( ( geom.g_res != INVALID ) && ( tab.g_res == geom.g_res ) ) ||
235 ( ( geom.s_res != INVALID ) && ( tab.s_res == geom.s_res ) ) )
236 {
237 lprintf(("gsc.lookup_geometry: "
238 "geometry lookup found: %ddpi, %ddpl\n",
239 tab.dpi, tab.dpl));
240 return i;
241 }
242 }
243
244 lprintf(("gsc.lookup_geometry: "
245 "geometry lookup failed on {%d, %d, 0x%02x, 0x%02x}\n",
246 geom.dpi, geom.dpl, geom.g_res, geom.s_res));
247
248 return INVALID;
249}
250
251/***********************************************************************
252 *
253 * get_geometry -- read geometry from status port
254 *
255 * Returns the index into geometry table or INVALID if it fails to
256 * either read the status byte or lookup the record.
257 */
258
259static int
260get_geometry(const struct gsc_unit *scu)
261{
262 struct gsc_geom geom = NEW_GEOM;
263
264 lprintf(("gsc.get_geometry: get geometry at 0x%03x\n", scu->stat));
265
266 if ( ( geom.g_res = inb(scu->stat) ) == FAIL )
267 return INVALID;
268
269 geom.g_res &= GSC_RES_MASK;
270
271 return lookup_geometry(geom, scu);
272}
273
274/***********************************************************************
275 *
276 * buffer_allocate -- allocate/reallocate a buffer
277 * Now just checks that the preallocated buffer is large enough.
278 */
279
280static int
281buffer_allocate(struct gsc_unit *scu)
282{
283 size_t size;
284
285 size = scu->blen * geomtab[scu->geometry].dpl / 8;
286
287 lprintf(("gsc.buffer_allocate: need 0x%x bytes\n", size));
288
289 if ( size > MAX_BUFSIZE )
290 {
291 lprintf(("gsc.buffer_allocate: 0x%x bytes are too much\n", size));
292 return ENOMEM;
293 }
294
295 scu->sbuf.size = size;
296 scu->sbuf.poi = size;
297
298 lprintf(("gsc.buffer_allocate: ok\n"));
299
300 return SUCCESS;
301}
302
303/***********************************************************************
304 *
305 * buffer_read -- scan a buffer
306 */
307
308static int
309buffer_read(struct gsc_unit *scu)
310{
311 int stb;
312 int res = SUCCESS;
313 int chan_bit;
314 char *p;
315 int sps;
316 int delay;
317
318 lprintf(("gsc.buffer_read: begin\n"));
319
320 if (scu->ctrl_byte == INVALID)
321 {
322 lprintf(("gsc.buffer_read: invalid ctrl_byte\n"));
323 return EIO;
324 }
325
326 sps=splbio();
327
328 outb( scu->ctrl, scu->ctrl_byte | GSC_POWER_ON );
329 outb( scu->clrp, 0 );
330 stb = inb( scu->stat );
331
332 isa_dmastart(ISADMA_READ, scu->sbuf.base, scu->sbuf.size, scu->channel);
333
334 chan_bit = 0x01 << scu->channel;
335
336 for(delay=0; !(inb(DMA1_READY) & 0x01 << scu->channel); delay += LONG)
337 {
338 if(delay >= scu->btime)
339 {
340 splx(sps);
341 lprintf(("gsc.buffer_read: timeout\n"));
342 res = EWOULDBLOCK;
343 break;
344 }
377d4740 345 res = tsleep((caddr_t)scu, PCATCH, "gscread", LONG);
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346 if ( ( res == 0 ) || ( res == EWOULDBLOCK ) )
347 res = SUCCESS;
348 else
349 break;
350 }
351 splx(sps);
352 isa_dmadone(ISADMA_READ, scu->sbuf.base, scu->sbuf.size, scu->channel);
353 outb( scu->clrp, 0 );
354
355 if(res != SUCCESS)
356 {
357 lprintf(("gsc.buffer_read: aborted with %d\n", res));
358 return res;
359 }
360
361 lprintf(("gsc.buffer_read: invert buffer\n"));
362 for(p = scu->sbuf.base + scu->sbuf.size - 1; p >= scu->sbuf.base; p--)
363 *p = ~*p;
364
365 scu->sbuf.poi = 0;
366 lprintf(("gsc.buffer_read: ok\n"));
367 return SUCCESS;
368}
369
370/***********************************************************************
371 *
372 * the main functions
373 *
374 ***********************************************************************/
375
376/***********************************************************************
377 *
378 * gscprobe
379 *
380 * read status port and check for proper configuration:
381 * - if address group matches (status byte has reasonable value)
382 * - if DMA channel matches (status byte has correct value)
383 */
384
385static int
386gscprobe (struct isa_device *isdp)
387{
388 int unit = isdp->id_unit;
389 struct gsc_unit *scu = unittab + unit;
390 int stb;
391 struct gsc_geom geom = NEW_GEOM;
392 static int once;
393
394 if (!once++)
395 cdevsw_add(&gsc_cdevsw);
396
397 scu->flags = FLAG_DEBUG;
398
399 lprintf(("gsc%d.probe "
400 "on iobase 0x%03x, irq %d, drq %d, addr %p, size %d\n",
401 unit,
402 isdp->id_iobase,
403 isdp->id_irq,
404 isdp->id_drq,
405 isdp->id_maddr,
406 isdp->id_msize));
407
408 if ( isdp->id_iobase < 0 )
409 {
410 lprintf(("gsc%d.probe: no iobase given\n", unit));
411 return PROBE_FAIL;
412 }
413
414 stb = inb( GSC_STAT(isdp->id_iobase) );
415 if (stb == FAIL)
416 {
417 lprintf(("gsc%d.probe: get status byte failed\n", unit));
418 return PROBE_FAIL;
419 }
420
421 scu->data = GSC_DATA(isdp->id_iobase);
422 scu->stat = GSC_STAT(isdp->id_iobase);
423 scu->ctrl = GSC_CTRL(isdp->id_iobase);
424 scu->clrp = GSC_CLRP(isdp->id_iobase);
425
426 outb(scu->clrp,stb);
427 stb = inb(scu->stat);
428
429 switch(stb & GSC_CNF_MASK) {
430 case GSC_CNF_DMA1:
431 lprintf(("gsc%d.probe: DMA 1\n", unit));
432 scu->channel = 1;
433 break;
434
435 case GSC_CNF_DMA3:
436 lprintf(("gsc%d.probe: DMA 3\n", unit));
437 scu->channel = 3;
438 break;
439
440 case GSC_CNF_IRQ3:
441 lprintf(("gsc%d.probe: IRQ 3\n", unit));
442 goto probe_noirq;
443 case GSC_CNF_IRQ5:
444 lprintf(("gsc%d.probe: IRQ 5\n", unit));
445 probe_noirq:
446 lprintf(("gsc%d.probe: sorry, can't use IRQ yet\n", unit));
447 return PROBE_FAIL;
448 default:
449 lprintf(("gsc%d.probe: invalid status byte 0x%02x\n", unit, (u_char) stb));
450 return PROBE_FAIL;
451 }
452
453 if (isdp->id_drq < 0)
454 isdp->id_drq = scu->channel;
455 if (scu->channel != isdp->id_drq)
456 {
457 lprintf(("gsc%d.probe: drq mismatch: config: %d; hardware: %d\n",
458 unit, isdp->id_drq, scu->channel));
459 return PROBE_FAIL;
460 }
461
462 geom.g_res = stb & GSC_RES_MASK;
463 scu->geometry = lookup_geometry(geom, scu);
464 if (scu->geometry == INVALID)
465 {
466 lprintf(("gsc%d.probe: geometry lookup failed\n", unit));
467 return PROBE_FAIL;
468 }
469 else
470 {
471 scu->ctrl_byte = geomtab[scu->geometry].s_res;
472 outb(scu->ctrl, scu->ctrl_byte | GSC_POWER_ON);
473
474 lprintf(("gsc%d.probe: status 0x%02x, %ddpi\n",
475 unit, stb, geomtab[scu->geometry].dpi));
476
477 outb(scu->ctrl, scu->ctrl_byte & ~GSC_POWER_ON);
478 }
479
480 lprintf(("gsc%d.probe: ok\n", unit));
481
482 scu->flags &= ~FLAG_DEBUG;
483
484 return PROBE_SUCCESS;
485}
486
487/***********************************************************************
488 *
489 * gscattach
490 *
491 * finish initialization of unit structure
492 * get geometry value
493 */
494
495static int
496gscattach(struct isa_device *isdp)
497{
498 int unit = isdp->id_unit;
499 struct gsc_unit *scu = unittab + unit;
500
501 scu->flags |= FLAG_DEBUG;
502
503 lprintf(("gsc%d.attach: "
504 "iobase 0x%03x, irq %d, drq %d, addr %p, size %d\n",
505 unit,
506 isdp->id_iobase,
507 isdp->id_irq,
508 isdp->id_drq,
509 isdp->id_maddr,
510 isdp->id_msize));
511
512 printf("gsc%d: GeniScan GS-4500 at %ddpi\n",
513 unit, geomtab[scu->geometry].dpi);
514
515 /*
516 * Initialize buffer structure.
517 * XXX this must be done early to give a good chance of getting a
518 * contiguous buffer. This wastes memory.
519 */
520 scu->sbuf.base = contigmalloc((unsigned long)MAX_BUFSIZE, M_DEVBUF, M_NOWAIT,
521 0ul, 0xfffffful, 1ul, 0x10000ul);
522 if ( scu->sbuf.base == NULL )
523 {
524 lprintf(("gsc%d.attach: buffer allocation failed\n", unit));
525 return ATTACH_FAIL; /* XXX attach must not fail */
526 }
527 scu->sbuf.size = INVALID;
528 scu->sbuf.poi = INVALID;
529
530 scu->blen = DEFAULT_BLEN;
531 scu->btime = TIMEOUT;
532
533 scu->flags |= ATTACHED;
534 lprintf(("gsc%d.attach: ok\n", unit));
535 scu->flags &= ~FLAG_DEBUG;
536#define GSC_UID 0
537#define GSC_GID 13
538 make_dev(&gsc_cdevsw, unit<<6, GSC_UID, GSC_GID, 0666, "gsc%d", unit);
539 make_dev(&gsc_cdevsw, ((unit<<6) + FRMT_PBM),
540 GSC_UID, GSC_GID, 0666, "gsc%dp", unit);
541 make_dev(&gsc_cdevsw, ((unit<<6) + DBUG_MASK),
542 GSC_UID, GSC_GID, 0666, "gsc%dd", unit);
543 make_dev(&gsc_cdevsw, ((unit<<6) + DBUG_MASK+FRMT_PBM),
544 GSC_UID, GSC_GID, 0666, "gsc%dpd", unit);
545
546 return ATTACH_SUCCESS;
547}
548
549/***********************************************************************
550 *
551 * gscopen
552 *
553 * set open flag
554 * set modes according to minor number
555 * don't switch scanner on, wait until first read ioctls go before
556 */
557
558static int
7b95be2a 559gscopen (dev_t dev, int flags, int fmt, struct thread *td)
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560{
561 struct gsc_unit *scu;
562 int unit;
563
564 unit = UNIT(minor(dev)) & UNIT_MASK;
565 if ( unit >= NGSC )
566 {
567#ifdef GSCDEBUG
568 /* XXX lprintf isn't valid here since there is no scu. */
569 printf("gsc%d.open: unconfigured unit number (max %d)\n", unit, NGSC);
570#endif
571 return ENXIO;
572 }
573 scu = unittab + unit;
574 if ( !( scu->flags & ATTACHED ) )
575 {
576 lprintf(("gsc%d.open: unit was not attached successfully 0x%04x\n",
577 unit, scu->flags));
578 return ENXIO;
579 }
580
581 if ( minor(dev) & DBUG_MASK )
582 scu->flags |= FLAG_DEBUG;
583 else
584 scu->flags &= ~FLAG_DEBUG;
585
586 switch(minor(dev) & FRMT_MASK) {
587 case FRMT_PBM:
588 scu->flags |= PBM_MODE;
589 lprintf(("gsc%d.open: pbm mode\n", unit));
590 break;
591 case FRMT_RAW:
592 lprintf(("gsc%d.open: raw mode\n", unit));
593 scu->flags &= ~PBM_MODE;
594 break;
595 default:
596 lprintf(("gsc%d.open: gray maps are not yet supported", unit));
597 return ENXIO;
598 }
599
600 lprintf(("gsc%d.open: minor %d\n",
601 unit, minor(dev)));
602
603 if ( scu->flags & OPEN )
604 {
605 lprintf(("gsc%d.open: already open", unit));
606 return EBUSY;
607 }
608
609 if (isa_dma_acquire(scu->channel))
610 return(EBUSY);
611
612 scu->flags |= OPEN;
613
614 return SUCCESS;
615}
616
617/***********************************************************************
618 *
619 * gscclose
620 *
621 * turn off scanner
622 * release the buffer
623 */
624
625static int
7b95be2a 626gscclose (dev_t dev, int flags, int fmt, struct thread *td)
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627{
628 int unit = UNIT(minor(dev));
629 struct gsc_unit *scu = unittab + unit;
630
631 lprintf(("gsc%d.close: minor %d\n",
632 unit, minor(dev)));
633
634 if ( unit >= NGSC || !( scu->flags & ATTACHED ) )
635 {
636 lprintf(("gsc%d.read: unit was not attached successfully 0x%04x\n",
637 unit, scu->flags));
638 return ENXIO;
639 }
640
641 outb(scu->ctrl, scu->ctrl_byte & ~GSC_POWER_ON);
642
643 scu->sbuf.size = INVALID;
644 scu->sbuf.poi = INVALID;
645
646 isa_dma_release(scu->channel);
647
648 scu->flags &= ~(FLAG_DEBUG | OPEN | READING);
649
650 return SUCCESS;
651}
652
653/***********************************************************************
654 *
655 * gscread
656 */
657
658static int
659gscread (dev_t dev, struct uio *uio, int ioflag)
660{
661 int unit = UNIT(minor(dev));
662 struct gsc_unit *scu = unittab + unit;
663 size_t nbytes;
664 int res;
665
666 lprintf(("gsc%d.read: minor %d\n", unit, minor(dev)));
667
668 if ( unit >= NGSC || !( scu->flags & ATTACHED ) )
669 {
670 lprintf(("gsc%d.read: unit was not attached successfully 0x%04x\n",
671 unit, scu->flags));
672 return ENXIO;
673 }
674
675 if ( !(scu->flags & READING) )
676 {
677 res = buffer_allocate(scu);
678 if ( res == SUCCESS )
679 scu->flags |= READING;
680 else
681 return res;
682
683 scu->ctrl_byte = geomtab[scu->geometry].s_res;
684
685 /* initialize for pbm mode */
686 if ( scu->flags & PBM_MODE )
687 {
688 char *p;
689 int width = geomtab[scu->geometry].dpl;
690
691 sprintf(scu->sbuf.base,"P4 %d %d\n", width, scu->height);
692 scu->bcount = scu->height * width / 8;
693
694 lprintf(("gsc%d.read: initializing pbm mode: `%s', bcount: 0x%x\n",
695 unit, scu->sbuf.base, scu->bcount));
696
697 /* move header to end of sbuf */
698 for(p=scu->sbuf.base; *p; p++);
699 while(--p >= scu->sbuf.base)
700 {
701 *(char *)(scu->sbuf.base + --scu->sbuf.poi) = *p;
702 scu->bcount++;
703 }
704 }
705 }
706
707 lprintf(("gsc%d.read(before buffer_read): "
708 "size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
709 unit, scu->sbuf.size, scu->sbuf.poi, scu->bcount));
710
711 if ( scu->sbuf.poi == scu->sbuf.size )
712 if ( (res = buffer_read(scu)) != SUCCESS )
713 return res;
714
715 lprintf(("gsc%d.read(after buffer_read): "
716 "size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
717 unit, scu->sbuf.size, scu->sbuf.poi, scu->bcount));
718
719 nbytes = MIN( uio->uio_resid, scu->sbuf.size - scu->sbuf.poi );
720
721 if ( (scu->flags & PBM_MODE) )
722 nbytes = MIN( nbytes, scu->bcount );
723
724 lprintf(("gsc%d.read: transferring 0x%x bytes", unit, nbytes));
725
726 res = uiomove(scu->sbuf.base + scu->sbuf.poi, nbytes, uio);
727 if ( res != SUCCESS )
728 {
729 lprintf(("gsc%d.read: uiomove failed %d", unit, res));
730 return res;
731 }
732
733 scu->sbuf.poi += nbytes;
734 if ( scu->flags & PBM_MODE ) scu->bcount -= nbytes;
735
736 lprintf(("gsc%d.read: size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
737 unit, scu->sbuf.size, scu->sbuf.poi, scu->bcount));
738
739 return SUCCESS;
740}
741
742/***********************************************************************
743 *
744 * gscioctl
745 *
746 */
747
748static int
7b95be2a 749gscioctl (dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
984263bc
MD
750{
751 int unit = UNIT(minor(dev));
752 struct gsc_unit *scu = unittab + unit;
753
754 lprintf(("gsc%d.ioctl: minor %d\n",
755 unit, minor(dev)));
756
757 if ( unit >= NGSC || !( scu->flags & ATTACHED ) )
758 {
759 lprintf(("gsc%d.ioctl: unit was not attached successfully 0x%04x\n",
760 unit, scu->flags));
761 return ENXIO;
762 }
763
764 switch(cmd) {
765 case GSC_SRESSW:
766 lprintf(("gsc%d.ioctl:GSC_SRESSW\n", unit));
767 if ( scu->flags & READING )
768 {
769 lprintf(("gsc%d:ioctl on already reading unit\n", unit));
770 return EBUSY;
771 }
772 scu->geometry = get_geometry(scu);
773 return SUCCESS;
774 case GSC_GRES:
775 *(int *)data=geomtab[scu->geometry].dpi;
776 lprintf(("gsc%d.ioctl:GSC_GRES %ddpi\n", unit, *(int *)data));
777 return SUCCESS;
778 case GSC_GWIDTH:
779 *(int *)data=geomtab[scu->geometry].dpl;
780 lprintf(("gsc%d.ioctl:GSC_GWIDTH %d\n", unit, *(int *)data));
781 return SUCCESS;
782 case GSC_SRES:
783 case GSC_SWIDTH:
784 lprintf(("gsc%d.ioctl:GSC_SRES or GSC_SWIDTH %d\n",
785 unit, *(int *)data));
786 { int g;
787 struct gsc_geom geom = NEW_GEOM;
788 if ( cmd == GSC_SRES )
789 geom.dpi = *(int *)data;
790 else
791 geom.dpl = *(int *)data;
792 if ( ( g = lookup_geometry(geom, scu) ) == INVALID )
793 return EINVAL;
794 scu->geometry = g;
795 return SUCCESS;
796 }
797 case GSC_GHEIGHT:
798 *(int *)data=scu->height;
799 lprintf(("gsc%d.ioctl:GSC_GHEIGHT %d\n", unit, *(int *)data));
800 return SUCCESS;
801 case GSC_SHEIGHT:
802 lprintf(("gsc%d.ioctl:GSC_SHEIGHT %d\n", unit, *(int *)data));
803 if ( scu->flags & READING )
804 {
805 lprintf(("gsc%d:ioctl on already reading unit\n", unit));
806 return EBUSY;
807 }
808 scu->height=*(int *)data;
809 return SUCCESS;
810 case GSC_GBLEN:
811 *(int *)data=scu->blen;
812 lprintf(("gsc%d.ioctl:GSC_GBLEN %d\n", unit, *(int *)data));
813 return SUCCESS;
814 case GSC_SBLEN:
815 lprintf(("gsc%d.ioctl:GSC_SBLEN %d\n", unit, *(int *)data));
816 if (*(int *)data * geomtab[scu->geometry].dpl / 8 > MAX_BUFSIZE)
817 {
818 lprintf(("gsc%d:ioctl buffer size too high\n", unit));
819 return ENOMEM;
820 }
821 scu->blen=*(int *)data;
822 return SUCCESS;
823 case GSC_GBTIME:
824 *(int *)data = scu->btime / hz;
825 lprintf(("gsc%d.ioctl:GSC_GBTIME %d\n", unit, *(int *)data));
826 return SUCCESS;
827 case GSC_SBTIME:
828 scu->btime = *(int *)data * hz;
829 lprintf(("gsc%d.ioctl:GSC_SBTIME %d\n", unit, *(int *)data));
830 return SUCCESS;
831 default: return ENOTTY;
832 }
833}