Device layer rollup commit.
[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 $
e4c9c0c8 35 * $DragonFly: src/sys/dev/video/gsc/gsc.c,v 1.9 2004/05/19 22:52:54 dillon Exp $
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36 *
37 */
38
1f2de5d4 39#include "use_gsc.h"
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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
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50#include <bus/isa/i386/isa.h>
51#include <bus/isa/i386/isa_device.h>
52#include "gscreg.h"
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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
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80#define TIMEOUT (hz*15) /* timeout while reading a buffer - default value */
81#define LONG (hz/60) /* timesteps while reading a buffer */
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82
83/***********************************************************************
84 *
85 * LAYOUT OF THE MINOR NUMBER
86 *
87 ***********************************************************************/
88
89#define UNIT_MASK 0xc0 /* unit gsc0 .. gsc3 */
90#define UNIT(x) (x >> 6)
91#define DBUG_MASK 0x20
92#define FRMT_MASK 0x18 /* output format */
93#define FRMT_RAW 0x00 /* output bits as read from scanner */
94#define FRMT_GRAY 0x10 /* output graymap (not implemented yet) */
95#define FRMT_PBM 0x08 /* output pbm format */
96#define FRMT_PGM 0x18
97
98/***********************************************************************
99 *
100 * THE GEMOMETRY TABLE
101 *
102 ***********************************************************************/
103
104#define GEOMTAB_SIZE 7
105
106static const struct gsc_geom {
107 int dpi; /* dots per inch */
108 int dpl; /* dots per line */
109 int g_res; /* get resolution value (status flag) */
110 int s_res; /* set resolution value (control register) */
111} geomtab[GEOMTAB_SIZE] = {
112 { 100, 424, GSC_RES_100, GSC_CNT_424},
113 { 200, 840, GSC_RES_200, GSC_CNT_840},
114 { 300, 1264, GSC_RES_300, GSC_CNT_1264},
115 { 400, 1648, GSC_RES_400, GSC_CNT_1648},
116 { -1, 1696, -1, GSC_CNT_1696},
117 { -2, 2644, -2, GSC_CNT_2544},
118 { -3, 3648, -3, GSC_CNT_3648},
119};
120
121#define NEW_GEOM { INVALID, INVALID, INVALID, INVALID }
122
123/***********************************************************************
124 *
125 * THE TABLE OF UNITS
126 *
127 ***********************************************************************/
128
129struct _sbuf {
130 size_t size;
131 size_t poi;
132 char *base;
133};
134
135struct gsc_unit {
136 int channel; /* DMA channel */
137 int data; /* - video port */
138 int stat; /* - status port */
139 int ctrl; /* - control port */
140 int clrp; /* - clear port */
141 int flags;
142#define ATTACHED 0x01
143#define OPEN 0x02
144#define READING 0x04
145#define EOF 0x08
146#define FLAG_DEBUG 0x10
147#define PBM_MODE 0x20
148 int geometry; /* resolution as geomtab index */
149 int blen; /* length of buffer in lines */
150 int btime; /* timeout of buffer in seconds/hz */
151 struct _sbuf sbuf;
152 char ctrl_byte; /* the byte actually written to ctrl port */
153 int height; /* height, for pnm modes */
154 size_t bcount; /* bytes to read, for pnm modes */
155 struct _sbuf hbuf; /* buffer for pnm header data */
156};
157
158static struct gsc_unit unittab[NGSC];
159
160/* I could not find a reasonable buffer size limit other than by
161 * experiments. MAXPHYS is obviously too much, while DEV_BSIZE and
162 * PAGE_SIZE are really too small. There must be something wrong
163 * with isa_dmastart/isa_dmarangecheck HELP!!!
164 */
165#define MAX_BUFSIZE 0x3000
166#define DEFAULT_BLEN 59
167
168/***********************************************************************
169 *
170 * THE PER-DRIVER RECORD FOR ISA.C
171 *
172 ***********************************************************************/
173
174static int gscprobe (struct isa_device *isdp);
175static int gscattach(struct isa_device *isdp);
176
177struct isa_driver gscdriver = { gscprobe, gscattach, "gsc" };
178
179static d_open_t gscopen;
180static d_close_t gscclose;
181static d_read_t gscread;
182static d_ioctl_t gscioctl;
183
184#define CDEV_MAJOR 47
185static struct cdevsw gsc_cdevsw = {
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186 /* name */ "gsc",
187 /* maj */ CDEV_MAJOR,
188 /* flags */ 0,
189 /* port */ NULL,
455fcd7e 190 /* clone */ NULL,
fabb8ceb 191
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192 /* open */ gscopen,
193 /* close */ gscclose,
194 /* read */ gscread,
195 /* write */ nowrite,
196 /* ioctl */ gscioctl,
197 /* poll */ nopoll,
198 /* mmap */ nommap,
199 /* strategy */ nostrategy,
984263bc 200 /* dump */ nodump,
fabb8ceb 201 /* psize */ nopsize
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202};
203
204
205/***********************************************************************
206 *
207 * LOCALLY USED SUBROUTINES
208 *
209 ***********************************************************************/
210
211/***********************************************************************
212 *
213 * lookup_geometry -- lookup a record in the geometry table by pattern
214 *
215 * The caller supplies a geometry record pattern, where INVALID
216 * matches anything. Returns the index in the table or INVALID if
217 * lookup fails.
218 */
219
220static int
221lookup_geometry(struct gsc_geom geom, const struct gsc_unit *scu)
222{
223 struct gsc_geom tab;
224 int i;
225
226 for(i=0; i<GEOMTAB_SIZE; i++)
227 {
228 tab = geomtab[i];
229
230 if ( ( ( geom.dpi != INVALID ) && ( tab.dpi == geom.dpi ) ) ||
231 ( ( geom.dpl != INVALID ) && ( tab.dpl == geom.dpl ) ) ||
232 ( ( geom.g_res != INVALID ) && ( tab.g_res == geom.g_res ) ) ||
233 ( ( geom.s_res != INVALID ) && ( tab.s_res == geom.s_res ) ) )
234 {
235 lprintf(("gsc.lookup_geometry: "
236 "geometry lookup found: %ddpi, %ddpl\n",
237 tab.dpi, tab.dpl));
238 return i;
239 }
240 }
241
242 lprintf(("gsc.lookup_geometry: "
243 "geometry lookup failed on {%d, %d, 0x%02x, 0x%02x}\n",
244 geom.dpi, geom.dpl, geom.g_res, geom.s_res));
245
246 return INVALID;
247}
248
249/***********************************************************************
250 *
251 * get_geometry -- read geometry from status port
252 *
253 * Returns the index into geometry table or INVALID if it fails to
254 * either read the status byte or lookup the record.
255 */
256
257static int
258get_geometry(const struct gsc_unit *scu)
259{
260 struct gsc_geom geom = NEW_GEOM;
261
262 lprintf(("gsc.get_geometry: get geometry at 0x%03x\n", scu->stat));
263
264 if ( ( geom.g_res = inb(scu->stat) ) == FAIL )
265 return INVALID;
266
267 geom.g_res &= GSC_RES_MASK;
268
269 return lookup_geometry(geom, scu);
270}
271
272/***********************************************************************
273 *
274 * buffer_allocate -- allocate/reallocate a buffer
275 * Now just checks that the preallocated buffer is large enough.
276 */
277
278static int
279buffer_allocate(struct gsc_unit *scu)
280{
281 size_t size;
282
283 size = scu->blen * geomtab[scu->geometry].dpl / 8;
284
285 lprintf(("gsc.buffer_allocate: need 0x%x bytes\n", size));
286
287 if ( size > MAX_BUFSIZE )
288 {
289 lprintf(("gsc.buffer_allocate: 0x%x bytes are too much\n", size));
290 return ENOMEM;
291 }
292
293 scu->sbuf.size = size;
294 scu->sbuf.poi = size;
295
296 lprintf(("gsc.buffer_allocate: ok\n"));
297
298 return SUCCESS;
299}
300
301/***********************************************************************
302 *
303 * buffer_read -- scan a buffer
304 */
305
306static int
307buffer_read(struct gsc_unit *scu)
308{
309 int stb;
310 int res = SUCCESS;
311 int chan_bit;
312 char *p;
313 int sps;
314 int delay;
315
316 lprintf(("gsc.buffer_read: begin\n"));
317
318 if (scu->ctrl_byte == INVALID)
319 {
320 lprintf(("gsc.buffer_read: invalid ctrl_byte\n"));
321 return EIO;
322 }
323
324 sps=splbio();
325
326 outb( scu->ctrl, scu->ctrl_byte | GSC_POWER_ON );
327 outb( scu->clrp, 0 );
328 stb = inb( scu->stat );
329
330 isa_dmastart(ISADMA_READ, scu->sbuf.base, scu->sbuf.size, scu->channel);
331
332 chan_bit = 0x01 << scu->channel;
333
334 for(delay=0; !(inb(DMA1_READY) & 0x01 << scu->channel); delay += LONG)
335 {
336 if(delay >= scu->btime)
337 {
338 splx(sps);
339 lprintf(("gsc.buffer_read: timeout\n"));
340 res = EWOULDBLOCK;
341 break;
342 }
377d4740 343 res = tsleep((caddr_t)scu, PCATCH, "gscread", LONG);
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344 if ( ( res == 0 ) || ( res == EWOULDBLOCK ) )
345 res = SUCCESS;
346 else
347 break;
348 }
349 splx(sps);
350 isa_dmadone(ISADMA_READ, scu->sbuf.base, scu->sbuf.size, scu->channel);
351 outb( scu->clrp, 0 );
352
353 if(res != SUCCESS)
354 {
355 lprintf(("gsc.buffer_read: aborted with %d\n", res));
356 return res;
357 }
358
359 lprintf(("gsc.buffer_read: invert buffer\n"));
360 for(p = scu->sbuf.base + scu->sbuf.size - 1; p >= scu->sbuf.base; p--)
361 *p = ~*p;
362
363 scu->sbuf.poi = 0;
364 lprintf(("gsc.buffer_read: ok\n"));
365 return SUCCESS;
366}
367
368/***********************************************************************
369 *
370 * the main functions
371 *
372 ***********************************************************************/
373
374/***********************************************************************
375 *
376 * gscprobe
377 *
378 * read status port and check for proper configuration:
379 * - if address group matches (status byte has reasonable value)
380 * - if DMA channel matches (status byte has correct value)
381 */
382
383static int
384gscprobe (struct isa_device *isdp)
385{
386 int unit = isdp->id_unit;
387 struct gsc_unit *scu = unittab + unit;
388 int stb;
389 struct gsc_geom geom = NEW_GEOM;
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390
391 scu->flags = FLAG_DEBUG;
392
393 lprintf(("gsc%d.probe "
394 "on iobase 0x%03x, irq %d, drq %d, addr %p, size %d\n",
395 unit,
396 isdp->id_iobase,
397 isdp->id_irq,
398 isdp->id_drq,
399 isdp->id_maddr,
400 isdp->id_msize));
401
402 if ( isdp->id_iobase < 0 )
403 {
404 lprintf(("gsc%d.probe: no iobase given\n", unit));
405 return PROBE_FAIL;
406 }
407
408 stb = inb( GSC_STAT(isdp->id_iobase) );
409 if (stb == FAIL)
410 {
411 lprintf(("gsc%d.probe: get status byte failed\n", unit));
412 return PROBE_FAIL;
413 }
414
415 scu->data = GSC_DATA(isdp->id_iobase);
416 scu->stat = GSC_STAT(isdp->id_iobase);
417 scu->ctrl = GSC_CTRL(isdp->id_iobase);
418 scu->clrp = GSC_CLRP(isdp->id_iobase);
419
420 outb(scu->clrp,stb);
421 stb = inb(scu->stat);
422
423 switch(stb & GSC_CNF_MASK) {
424 case GSC_CNF_DMA1:
425 lprintf(("gsc%d.probe: DMA 1\n", unit));
426 scu->channel = 1;
427 break;
428
429 case GSC_CNF_DMA3:
430 lprintf(("gsc%d.probe: DMA 3\n", unit));
431 scu->channel = 3;
432 break;
433
434 case GSC_CNF_IRQ3:
435 lprintf(("gsc%d.probe: IRQ 3\n", unit));
436 goto probe_noirq;
437 case GSC_CNF_IRQ5:
438 lprintf(("gsc%d.probe: IRQ 5\n", unit));
439 probe_noirq:
440 lprintf(("gsc%d.probe: sorry, can't use IRQ yet\n", unit));
441 return PROBE_FAIL;
442 default:
443 lprintf(("gsc%d.probe: invalid status byte 0x%02x\n", unit, (u_char) stb));
444 return PROBE_FAIL;
445 }
446
447 if (isdp->id_drq < 0)
448 isdp->id_drq = scu->channel;
449 if (scu->channel != isdp->id_drq)
450 {
451 lprintf(("gsc%d.probe: drq mismatch: config: %d; hardware: %d\n",
452 unit, isdp->id_drq, scu->channel));
453 return PROBE_FAIL;
454 }
455
456 geom.g_res = stb & GSC_RES_MASK;
457 scu->geometry = lookup_geometry(geom, scu);
458 if (scu->geometry == INVALID)
459 {
460 lprintf(("gsc%d.probe: geometry lookup failed\n", unit));
461 return PROBE_FAIL;
462 }
463 else
464 {
465 scu->ctrl_byte = geomtab[scu->geometry].s_res;
466 outb(scu->ctrl, scu->ctrl_byte | GSC_POWER_ON);
467
468 lprintf(("gsc%d.probe: status 0x%02x, %ddpi\n",
469 unit, stb, geomtab[scu->geometry].dpi));
470
471 outb(scu->ctrl, scu->ctrl_byte & ~GSC_POWER_ON);
472 }
473
474 lprintf(("gsc%d.probe: ok\n", unit));
475
476 scu->flags &= ~FLAG_DEBUG;
477
478 return PROBE_SUCCESS;
479}
480
481/***********************************************************************
482 *
483 * gscattach
484 *
485 * finish initialization of unit structure
486 * get geometry value
487 */
488
489static int
490gscattach(struct isa_device *isdp)
491{
492 int unit = isdp->id_unit;
493 struct gsc_unit *scu = unittab + unit;
494
495 scu->flags |= FLAG_DEBUG;
496
497 lprintf(("gsc%d.attach: "
498 "iobase 0x%03x, irq %d, drq %d, addr %p, size %d\n",
499 unit,
500 isdp->id_iobase,
501 isdp->id_irq,
502 isdp->id_drq,
503 isdp->id_maddr,
504 isdp->id_msize));
505
506 printf("gsc%d: GeniScan GS-4500 at %ddpi\n",
507 unit, geomtab[scu->geometry].dpi);
508
509 /*
510 * Initialize buffer structure.
511 * XXX this must be done early to give a good chance of getting a
512 * contiguous buffer. This wastes memory.
513 */
514 scu->sbuf.base = contigmalloc((unsigned long)MAX_BUFSIZE, M_DEVBUF, M_NOWAIT,
515 0ul, 0xfffffful, 1ul, 0x10000ul);
516 if ( scu->sbuf.base == NULL )
517 {
518 lprintf(("gsc%d.attach: buffer allocation failed\n", unit));
519 return ATTACH_FAIL; /* XXX attach must not fail */
520 }
521 scu->sbuf.size = INVALID;
522 scu->sbuf.poi = INVALID;
523
524 scu->blen = DEFAULT_BLEN;
525 scu->btime = TIMEOUT;
526
527 scu->flags |= ATTACHED;
528 lprintf(("gsc%d.attach: ok\n", unit));
529 scu->flags &= ~FLAG_DEBUG;
530#define GSC_UID 0
531#define GSC_GID 13
e4c9c0c8 532 cdevsw_add(&gsc_cdevsw, 0xc0, unit << 6);
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533 make_dev(&gsc_cdevsw, unit<<6, GSC_UID, GSC_GID, 0666, "gsc%d", unit);
534 make_dev(&gsc_cdevsw, ((unit<<6) + FRMT_PBM),
535 GSC_UID, GSC_GID, 0666, "gsc%dp", unit);
536 make_dev(&gsc_cdevsw, ((unit<<6) + DBUG_MASK),
537 GSC_UID, GSC_GID, 0666, "gsc%dd", unit);
538 make_dev(&gsc_cdevsw, ((unit<<6) + DBUG_MASK+FRMT_PBM),
539 GSC_UID, GSC_GID, 0666, "gsc%dpd", unit);
540
541 return ATTACH_SUCCESS;
542}
543
544/***********************************************************************
545 *
546 * gscopen
547 *
548 * set open flag
549 * set modes according to minor number
550 * don't switch scanner on, wait until first read ioctls go before
551 */
552
553static int
7b95be2a 554gscopen (dev_t dev, int flags, int fmt, struct thread *td)
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555{
556 struct gsc_unit *scu;
557 int unit;
558
559 unit = UNIT(minor(dev)) & UNIT_MASK;
560 if ( unit >= NGSC )
561 {
562#ifdef GSCDEBUG
563 /* XXX lprintf isn't valid here since there is no scu. */
564 printf("gsc%d.open: unconfigured unit number (max %d)\n", unit, NGSC);
565#endif
566 return ENXIO;
567 }
568 scu = unittab + unit;
569 if ( !( scu->flags & ATTACHED ) )
570 {
571 lprintf(("gsc%d.open: unit was not attached successfully 0x%04x\n",
572 unit, scu->flags));
573 return ENXIO;
574 }
575
576 if ( minor(dev) & DBUG_MASK )
577 scu->flags |= FLAG_DEBUG;
578 else
579 scu->flags &= ~FLAG_DEBUG;
580
581 switch(minor(dev) & FRMT_MASK) {
582 case FRMT_PBM:
583 scu->flags |= PBM_MODE;
584 lprintf(("gsc%d.open: pbm mode\n", unit));
585 break;
586 case FRMT_RAW:
587 lprintf(("gsc%d.open: raw mode\n", unit));
588 scu->flags &= ~PBM_MODE;
589 break;
590 default:
591 lprintf(("gsc%d.open: gray maps are not yet supported", unit));
592 return ENXIO;
593 }
594
595 lprintf(("gsc%d.open: minor %d\n",
596 unit, minor(dev)));
597
598 if ( scu->flags & OPEN )
599 {
600 lprintf(("gsc%d.open: already open", unit));
601 return EBUSY;
602 }
603
604 if (isa_dma_acquire(scu->channel))
605 return(EBUSY);
606
607 scu->flags |= OPEN;
608
609 return SUCCESS;
610}
611
612/***********************************************************************
613 *
614 * gscclose
615 *
616 * turn off scanner
617 * release the buffer
618 */
619
620static int
7b95be2a 621gscclose (dev_t dev, int flags, int fmt, struct thread *td)
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622{
623 int unit = UNIT(minor(dev));
624 struct gsc_unit *scu = unittab + unit;
625
626 lprintf(("gsc%d.close: minor %d\n",
627 unit, minor(dev)));
628
629 if ( unit >= NGSC || !( scu->flags & ATTACHED ) )
630 {
631 lprintf(("gsc%d.read: unit was not attached successfully 0x%04x\n",
632 unit, scu->flags));
633 return ENXIO;
634 }
635
636 outb(scu->ctrl, scu->ctrl_byte & ~GSC_POWER_ON);
637
638 scu->sbuf.size = INVALID;
639 scu->sbuf.poi = INVALID;
640
641 isa_dma_release(scu->channel);
642
643 scu->flags &= ~(FLAG_DEBUG | OPEN | READING);
644
645 return SUCCESS;
646}
647
648/***********************************************************************
649 *
650 * gscread
651 */
652
653static int
654gscread (dev_t dev, struct uio *uio, int ioflag)
655{
656 int unit = UNIT(minor(dev));
657 struct gsc_unit *scu = unittab + unit;
658 size_t nbytes;
659 int res;
660
661 lprintf(("gsc%d.read: minor %d\n", unit, minor(dev)));
662
663 if ( unit >= NGSC || !( scu->flags & ATTACHED ) )
664 {
665 lprintf(("gsc%d.read: unit was not attached successfully 0x%04x\n",
666 unit, scu->flags));
667 return ENXIO;
668 }
669
670 if ( !(scu->flags & READING) )
671 {
672 res = buffer_allocate(scu);
673 if ( res == SUCCESS )
674 scu->flags |= READING;
675 else
676 return res;
677
678 scu->ctrl_byte = geomtab[scu->geometry].s_res;
679
680 /* initialize for pbm mode */
681 if ( scu->flags & PBM_MODE )
682 {
683 char *p;
684 int width = geomtab[scu->geometry].dpl;
685
686 sprintf(scu->sbuf.base,"P4 %d %d\n", width, scu->height);
687 scu->bcount = scu->height * width / 8;
688
689 lprintf(("gsc%d.read: initializing pbm mode: `%s', bcount: 0x%x\n",
690 unit, scu->sbuf.base, scu->bcount));
691
692 /* move header to end of sbuf */
693 for(p=scu->sbuf.base; *p; p++);
694 while(--p >= scu->sbuf.base)
695 {
696 *(char *)(scu->sbuf.base + --scu->sbuf.poi) = *p;
697 scu->bcount++;
698 }
699 }
700 }
701
702 lprintf(("gsc%d.read(before buffer_read): "
703 "size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
704 unit, scu->sbuf.size, scu->sbuf.poi, scu->bcount));
705
706 if ( scu->sbuf.poi == scu->sbuf.size )
707 if ( (res = buffer_read(scu)) != SUCCESS )
708 return res;
709
710 lprintf(("gsc%d.read(after buffer_read): "
711 "size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
712 unit, scu->sbuf.size, scu->sbuf.poi, scu->bcount));
713
714 nbytes = MIN( uio->uio_resid, scu->sbuf.size - scu->sbuf.poi );
715
716 if ( (scu->flags & PBM_MODE) )
717 nbytes = MIN( nbytes, scu->bcount );
718
719 lprintf(("gsc%d.read: transferring 0x%x bytes", unit, nbytes));
720
721 res = uiomove(scu->sbuf.base + scu->sbuf.poi, nbytes, uio);
722 if ( res != SUCCESS )
723 {
724 lprintf(("gsc%d.read: uiomove failed %d", unit, res));
725 return res;
726 }
727
728 scu->sbuf.poi += nbytes;
729 if ( scu->flags & PBM_MODE ) scu->bcount -= nbytes;
730
731 lprintf(("gsc%d.read: size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
732 unit, scu->sbuf.size, scu->sbuf.poi, scu->bcount));
733
734 return SUCCESS;
735}
736
737/***********************************************************************
738 *
739 * gscioctl
740 *
741 */
742
743static int
7b95be2a 744gscioctl (dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
984263bc
MD
745{
746 int unit = UNIT(minor(dev));
747 struct gsc_unit *scu = unittab + unit;
748
749 lprintf(("gsc%d.ioctl: minor %d\n",
750 unit, minor(dev)));
751
752 if ( unit >= NGSC || !( scu->flags & ATTACHED ) )
753 {
754 lprintf(("gsc%d.ioctl: unit was not attached successfully 0x%04x\n",
755 unit, scu->flags));
756 return ENXIO;
757 }
758
759 switch(cmd) {
760 case GSC_SRESSW:
761 lprintf(("gsc%d.ioctl:GSC_SRESSW\n", unit));
762 if ( scu->flags & READING )
763 {
764 lprintf(("gsc%d:ioctl on already reading unit\n", unit));
765 return EBUSY;
766 }
767 scu->geometry = get_geometry(scu);
768 return SUCCESS;
769 case GSC_GRES:
770 *(int *)data=geomtab[scu->geometry].dpi;
771 lprintf(("gsc%d.ioctl:GSC_GRES %ddpi\n", unit, *(int *)data));
772 return SUCCESS;
773 case GSC_GWIDTH:
774 *(int *)data=geomtab[scu->geometry].dpl;
775 lprintf(("gsc%d.ioctl:GSC_GWIDTH %d\n", unit, *(int *)data));
776 return SUCCESS;
777 case GSC_SRES:
778 case GSC_SWIDTH:
779 lprintf(("gsc%d.ioctl:GSC_SRES or GSC_SWIDTH %d\n",
780 unit, *(int *)data));
781 { int g;
782 struct gsc_geom geom = NEW_GEOM;
783 if ( cmd == GSC_SRES )
784 geom.dpi = *(int *)data;
785 else
786 geom.dpl = *(int *)data;
787 if ( ( g = lookup_geometry(geom, scu) ) == INVALID )
788 return EINVAL;
789 scu->geometry = g;
790 return SUCCESS;
791 }
792 case GSC_GHEIGHT:
793 *(int *)data=scu->height;
794 lprintf(("gsc%d.ioctl:GSC_GHEIGHT %d\n", unit, *(int *)data));
795 return SUCCESS;
796 case GSC_SHEIGHT:
797 lprintf(("gsc%d.ioctl:GSC_SHEIGHT %d\n", unit, *(int *)data));
798 if ( scu->flags & READING )
799 {
800 lprintf(("gsc%d:ioctl on already reading unit\n", unit));
801 return EBUSY;
802 }
803 scu->height=*(int *)data;
804 return SUCCESS;
805 case GSC_GBLEN:
806 *(int *)data=scu->blen;
807 lprintf(("gsc%d.ioctl:GSC_GBLEN %d\n", unit, *(int *)data));
808 return SUCCESS;
809 case GSC_SBLEN:
810 lprintf(("gsc%d.ioctl:GSC_SBLEN %d\n", unit, *(int *)data));
811 if (*(int *)data * geomtab[scu->geometry].dpl / 8 > MAX_BUFSIZE)
812 {
813 lprintf(("gsc%d:ioctl buffer size too high\n", unit));
814 return ENOMEM;
815 }
816 scu->blen=*(int *)data;
817 return SUCCESS;
818 case GSC_GBTIME:
819 *(int *)data = scu->btime / hz;
820 lprintf(("gsc%d.ioctl:GSC_GBTIME %d\n", unit, *(int *)data));
821 return SUCCESS;
822 case GSC_SBTIME:
823 scu->btime = *(int *)data * hz;
824 lprintf(("gsc%d.ioctl:GSC_SBTIME %d\n", unit, *(int *)data));
825 return SUCCESS;
826 default: return ENOTTY;
827 }
828}