FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/asc.c
1 /* asc.c - device driver for hand scanners
2 *
3 * Current version supports:
4 *
5 * - AmiScan (Mustek) Color and BW hand scanners (GI1904 chipset)
6 *
7 * Copyright (c) 1995 Gunther Schadow. All rights reserved.
8 * Copyright (c) 1995,1996,1997 Luigi Rizzo. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by Gunther Schadow
21 * and Luigi Rizzo.
22 * 4. The name of the author may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36 /*
37 * $FreeBSD$
38 */
39
40 #include "asc.h"
41 #if NASC > 0
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/conf.h>
45 #include <sys/proc.h>
46 #include <sys/buf.h>
47 #include <sys/malloc.h>
48 #include <sys/kernel.h>
49 #include <sys/poll.h>
50
51 #include "opt_devfs.h"
52
53 #ifdef DEVFS
54 #include <sys/devfsext.h>
55 #endif /*DEVFS*/
56 #include <sys/uio.h>
57
58 #include <machine/asc_ioctl.h>
59
60 #include <i386/isa/isa.h>
61 #include <i386/isa/isa_device.h>
62 #include <i386/isa/ascreg.h>
63
64 /***
65 *** CONSTANTS & DEFINES
66 ***
67 ***/
68
69 #define PROBE_FAIL 0
70 #define PROBE_SUCCESS IO_ASCSIZE
71 #define ATTACH_FAIL 0
72 #define ATTACH_SUCCESS 1
73 #define SUCCESS 0
74 #define FAIL -1
75 #define INVALID FAIL
76
77 #define DMA1_READY 0x08
78 #define ASCDEBUG
79 #ifdef ASCDEBUG
80 # define lprintf if(scu->flags & FLAG_DEBUG) printf
81 #else
82 # define lprintf (void)
83 #endif
84
85 #define TIMEOUT (hz*15) /* timeout while reading a buffer - default value */
86 #define ASCPRI PRIBIO /* priority while reading a buffer */
87
88 /***
89 *** LAYOUT OF THE MINOR NUMBER
90 ***/
91
92 #define UNIT_MASK 0xc0 /* unit asc0 .. asc3 */
93 #define UNIT(x) (x >> 6)
94 #define DBUG_MASK 0x20
95 #define FRMT_MASK 0x18 /* output format */
96 #define FRMT_RAW 0x00 /* output bits as read from scanner */
97 #define FRMT_GRAY 0x1 /* output gray mode for color scanner */
98 #define FRMT_PBM 0x08 /* output pbm format */
99 #define FRMT_PGM 0x18
100
101 /***
102 *** THE GEMOMETRY TABLE
103 ***/
104
105 #define GREY_LINE 826 /* 825, or 826 , or 550 ??? */
106 static const struct asc_geom {
107 int dpi; /* dots per inch */
108 int dpl; /* dots per line */
109 int bpl; /* bytes per line */
110 int g_res; /* get resolution value (ASC_STAT) */
111 } geomtab[] = {
112 { 800, 3312, 414, ASC_RES_800},
113 { 700, 2896, 362, ASC_RES_700},
114 { 600, 2480, 310, ASC_RES_600},
115 { 500, 1656, 258, ASC_RES_500},
116 { 400, 1656, 207, ASC_RES_400},
117 { 300, 1240, 155, ASC_RES_300},
118 { 200, 832, 104, ASC_RES_200},
119 { 100, 416, 52, ASC_RES_100},
120 { 200, 3*GREY_LINE, 3*GREY_LINE, 0 /* returned by color scanner */},
121 { 200, GREY_LINE, GREY_LINE, 0 /* color scanner, grey mode */},
122 { INVALID, 416, 52, INVALID } /* terminator */
123 };
124
125 /***
126 *** THE TABLE OF UNITS
127 ***/
128
129 struct _sbuf {
130 size_t size;
131 size_t rptr;
132 size_t wptr; /* only changed in ascintr */
133 size_t count;
134 char *base;
135 };
136
137 struct asc_unit {
138 long thedev; /* XXX */
139 int base; /* base address */
140 int dma_num; /* dma number */
141 char dma_byte; /* mask of byte for setting DMA value */
142 char int_byte; /* mask of byte for setting int value */
143 char cfg_byte; /* mirror of byte written to config reg (ASC_CFG). */
144 char cmd_byte; /* mirror of byte written to cmd port (ASC_CMD)*/
145 char portf_byte;
146 int flags;
147 #define ATTACHED 0x01
148 #define OPEN 0x02
149 #define READING 0x04
150 #define DMA_ACTIVE 0x08
151 #define SLEEPING 0x10
152 #define SEL_COLL 0x20
153 #define PBM_MODE 0x40
154 #define FLAG_DEBUG 0x80
155 int geometry; /* resolution as geomtab index */
156 int linesize; /* length of one scan line (from geom.table) */
157 int blen; /* length of buffer in lines */
158 int btime; /* timeout of buffer in seconds/hz */
159 struct _sbuf sbuf;
160 long icnt; /* interrupt count XXX for debugging */
161 struct selinfo selp;
162 int height; /* height, for pnm modes */
163 size_t bcount; /* bytes to read, for pnm modes */
164 #ifdef DEVFS
165 void *devfs_asc; /* storage for devfs tokens (handles) */
166 void *devfs_ascp;
167 void *devfs_ascd;
168 void *devfs_ascpd;
169 #endif
170 };
171
172 static struct asc_unit unittab[NASC];
173
174 /*** I could not find a reasonable buffer size limit other than by
175 *** experiments. MAXPHYS is obviously too much, while DEV_BSIZE and
176 *** PAGE_SIZE are really too small. There must be something wrong
177 *** with isa_dmastart/isa_dmarangecheck HELP!!!
178 ***
179 *** Note, must be DEFAULT_BLEN * samples_per_line <= MAX_BUFSIZE
180 ***/
181 #define MAX_BUFSIZE 0xb000 /* XXX was 0x3000 */
182 #define DEFAULT_BLEN 16
183
184 /***
185 *** THE PER-DRIVER RECORD FOR ISA.C
186 ***/
187 static int ascprobe (struct isa_device *isdp);
188 static int ascattach(struct isa_device *isdp);
189 struct isa_driver ascdriver = { ascprobe, ascattach, "asc" };
190
191 static ointhand2_t ascintr;
192
193 static d_open_t ascopen;
194 static d_close_t ascclose;
195 static d_read_t ascread;
196 static d_ioctl_t ascioctl;
197 static d_poll_t ascpoll;
198
199 #define CDEV_MAJOR 71
200
201 static struct cdevsw asc_cdevsw =
202 { ascopen, ascclose, ascread, nowrite, /*71*/
203 ascioctl, nostop, nullreset, nodevtotty, /* asc */
204 ascpoll, nommap, NULL, "asc", NULL, -1 };
205
206 #define STATIC static
207
208 /***
209 *** LOCALLY USED SUBROUTINES
210 ***
211 ***/
212
213 /***
214 *** get_resolution
215 *** read resolution from the scanner
216 ***/
217 static void
218 get_resolution(struct asc_unit *scu)
219 {
220 int res, i, delay;
221
222 res=0;
223 scu->cmd_byte = ASC_STANDBY;
224 outb(ASC_CMD, scu->cmd_byte);
225 tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascres", hz/10);
226 for(delay= 100; (res=inb(ASC_STAT)) & ASC_RDY_FLAG; delay--)
227 {
228 i = tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascres0", 1);
229 if ( ( i == 0 ) || ( i == EWOULDBLOCK ) )
230 i = SUCCESS;
231 else
232 break;
233 }
234 if (delay==0) {
235 lprintf("asc.get_resolution: timeout completing command\n");
236 return /* -1 */;
237 }
238 /* ... actual read resolution... */
239 res &= ASC_RES_MASK;
240 for (i=0; geomtab[i].dpi != INVALID; i++) {
241 if (geomtab[i].g_res == res) break;
242 }
243 if (geomtab[i].dpi==INVALID) {
244 scu->geometry= i; /* INVALID; */
245 lprintf("asc.get_resolution: wrong resolution\n");
246 } else {
247 lprintf("asc.get_resolution: %d dpi\n",geomtab[i].dpi);
248 scu->geometry = i;
249 }
250 scu->portf_byte=0; /* default */
251 if (geomtab[scu->geometry].g_res==0 && !(scu->thedev&FRMT_GRAY)) {
252 /* color scanner seems to require this */
253 scu->portf_byte=2;
254 /* scu->geometry++; */
255 }
256 scu->linesize = geomtab[scu->geometry].bpl;
257 scu->height = geomtab[scu->geometry].dpl; /* default... */
258 }
259
260 /***
261 *** buffer_allocate
262 *** allocate/reallocate a buffer
263 *** Now just checks that the preallocated buffer is large enough.
264 ***/
265
266 static int
267 buffer_allocate(struct asc_unit *scu)
268 {
269 size_t size, size1;
270
271 size = scu->blen * scu->linesize;
272
273 lprintf("asc.buffer_allocate: need 0x%x bytes\n", size);
274
275 if ( size > MAX_BUFSIZE ) {
276 size1=size;
277 size= ( (MAX_BUFSIZE+scu->linesize-1) / scu->linesize)*scu->linesize;
278 lprintf("asc.buffer_allocate: 0x%x bytes are too much, try 0x%x\n",
279 size1, size);
280 return ENOMEM;
281 }
282
283 scu->sbuf.size = size;
284 scu->sbuf.rptr = 0;
285 scu->sbuf.wptr = 0;
286 scu->sbuf.count = 0; /* available data for reading */
287
288 lprintf("asc.buffer_allocate: ok\n");
289
290 return SUCCESS;
291 }
292
293 /*** dma_restart
294 *** invoked locally to start dma. Must run in a critical section
295 ***/
296 static void
297 dma_restart(struct asc_unit *scu)
298 {
299 unsigned char al=scu->cmd_byte;
300
301 if (geomtab[scu->geometry].g_res==0) {/* color */
302 isa_dmastart(B_READ, scu->sbuf.base+scu->sbuf.wptr,
303 scu->linesize + 90 /* XXX */ , scu->dma_num);
304 /*
305 * looks like we have to set and then clear this
306 * bit to enable the scanner to send interrupts
307 */
308 outb( ASC_CMD, al |= 4 ); /* seems to disable interrupts */
309 #if 0
310 outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
311 #endif
312 outb( ASC_CMD, al &= 0xfb );
313 scu->cmd_byte = al;
314 } else { /* normal */
315 isa_dmastart(B_READ, scu->sbuf.base+scu->sbuf.wptr,
316 scu->linesize, scu->dma_num);
317 /*** this is done in sub_20, after dmastart ? ***/
318 #if 0
319 outb( ASC_CMD, al |= 4 );
320 outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
321 outb( ASC_CMD, al &= 0xfb );
322 scu->cmd_byte = al;
323 #else
324 outb( ASC_CMD, ASC_OPERATE);
325 #endif
326 }
327 scu->flags |= DMA_ACTIVE;
328 }
329
330 /***
331 *** the main functions
332 ***/
333
334 /*** asc_reset
335 *** resets the scanner and the config bytes...
336 ***/
337 static void
338 asc_reset(struct asc_unit *scu)
339 {
340 scu->cfg_byte = 0 ; /* clear... */
341 scu->cmd_byte = 0 ; /* clear... */
342
343 outb(ASC_CFG,scu->cfg_byte); /* for safety, do this here */
344 outb(ASC_CMD,scu->cmd_byte); /* probably not needed */
345 tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascres", hz/10); /* sleep .1 sec */
346
347 scu->blen = DEFAULT_BLEN;
348 scu->btime = TIMEOUT;
349 scu->height = 0 ; /* don't know better... */
350 }
351 /**************************************************************************
352 ***
353 *** ascprobe
354 *** read status port and check for proper configuration:
355 *** - if address group matches (status byte has reasonable value)
356 *** cannot check interrupt/dma, only clear the config byte.
357 ***/
358 static int
359 ascprobe (struct isa_device *isdp)
360 {
361 int unit = isdp->id_unit;
362 struct asc_unit *scu = unittab + unit;
363 int stb;
364
365 scu->base = isdp->id_iobase; /*** needed by the following macros ***/
366 scu->flags = FLAG_DEBUG;
367
368 if ( isdp->id_iobase < 0 ) {
369 lprintf("asc%d.probe: no iobase given\n", unit);
370 return PROBE_FAIL;
371 }
372
373 if ((stb=inb(ASC_PROBE)) != ASC_PROBE_VALUE) {
374 lprintf("asc%d.probe: failed, got 0x%02x instead of 0x%02x\n",
375 unit, stb, ASC_PROBE_VALUE);
376 return PROBE_FAIL;
377 }
378
379 /*
380 * NOTE NOTE NOTE
381 * the new AmiScan Color board uses int 10,11,12 instead of 3,5,10
382 * respectively. This means that the driver must act accordingly.
383 * Unfortunately there is no easy way of telling which board one has,
384 * other than trying to get an interrupt and noticing that it is
385 * missing. use "option ASC_NEW_BOARD" if you have a new board.
386 *
387 */
388
389 #if ASC_NEW_BOARD
390 #define ASC_IRQ_A 10
391 #define ASC_IRQ_B 11
392 #define ASC_IRQ_C 12
393 #else
394 #define ASC_IRQ_A 3
395 #define ASC_IRQ_B 5
396 #define ASC_IRQ_C 10
397 #endif
398
399 switch(ffs(isdp->id_irq) - 1) {
400 case ASC_IRQ_A :
401 scu->int_byte = ASC_CNF_IRQ3;
402 break;
403 case ASC_IRQ_B :
404 scu->int_byte = ASC_CNF_IRQ5;
405 break;
406 case ASC_IRQ_C :
407 scu->int_byte = ASC_CNF_IRQ10;
408 break;
409 #if 0
410 case -1:
411 scu->int_byte = 0;
412 lprintf("asc%d.probe: warning - going interruptless\n", unit);
413 break;
414 #endif
415 default:
416 lprintf("asc%d.probe: unsupported INT %d (only 3, 5, 10)\n",
417 unit, ffs(isdp->id_irq) - 1 );
418 return PROBE_FAIL;
419 }
420 scu->dma_num = isdp->id_drq;
421 switch(scu->dma_num) {
422 case 1:
423 scu->dma_byte = ASC_CNF_DMA1;
424 break;
425 case 3:
426 scu->dma_byte = ASC_CNF_DMA3;
427 break;
428 default:
429 lprintf("asc%d.probe: unsupported DMA %d (only 1 or 3)\n",
430 unit, scu->dma_num);
431 return PROBE_FAIL;
432 }
433 asc_reset(scu);
434 /* lprintf("asc%d.probe: ok\n", unit); */
435
436 scu->flags &= ~FLAG_DEBUG;
437 scu->icnt = 0;
438 return PROBE_SUCCESS;
439 }
440
441 /**************************************************************************
442 ***
443 *** ascattach
444 *** finish initialization of unit structure, get geometry value (?)
445 ***/
446
447 static int
448 ascattach(struct isa_device *isdp)
449 {
450 int unit = isdp->id_unit;
451 struct asc_unit *scu = unittab + unit;
452
453 isdp->id_ointr = ascintr;
454 scu->flags |= FLAG_DEBUG;
455 printf("asc%d: [GI1904/Trust Ami-Scan Grey/Color]\n", unit);
456
457 /*
458 * Initialize buffer structure.
459 * XXX this must be done early to give a good chance of getting a
460 * contiguous buffer. This wastes memory.
461 */
462 scu->sbuf.base = contigmalloc((unsigned long)MAX_BUFSIZE, M_DEVBUF, M_NOWAIT,
463 0ul, 0xfffffful, 1ul, 0x10000ul);
464 if ( scu->sbuf.base == NULL )
465 {
466 lprintf("asc%d.attach: buffer allocation failed\n", unit);
467 return ATTACH_FAIL; /* XXX attach must not fail */
468 }
469 scu->sbuf.size = INVALID;
470 scu->sbuf.rptr = INVALID;
471
472 scu->flags |= ATTACHED;
473 /* lprintf("asc%d.attach: ok\n", unit); */
474 scu->flags &= ~FLAG_DEBUG;
475
476 scu->selp.si_flags=0;
477 scu->selp.si_pid=(pid_t)0;
478 #ifdef DEVFS
479 #define ASC_UID 0
480 #define ASC_GID 13
481 scu->devfs_asc =
482 devfs_add_devswf(&asc_cdevsw, unit<<6, DV_CHR, ASC_UID,
483 ASC_GID, 0666, "asc%d", unit);
484 scu->devfs_ascp =
485 devfs_add_devswf(&asc_cdevsw, ((unit<<6) + FRMT_PBM), DV_CHR,
486 ASC_UID, ASC_GID, 0666, "asc%dp", unit);
487 scu->devfs_ascd =
488 devfs_add_devswf(&asc_cdevsw, ((unit<<6) + DBUG_MASK), DV_CHR,
489 ASC_UID, ASC_GID, 0666, "asc%dd", unit);
490 scu->devfs_ascpd =
491 devfs_add_devswf(&asc_cdevsw, ((unit<<6) + DBUG_MASK+FRMT_PBM),
492 DV_CHR, ASC_UID, ASC_GID, 0666, "asc%dpd",
493 unit);
494 #endif /*DEVFS*/
495 return ATTACH_SUCCESS;
496 }
497
498 /**************************************************************************
499 ***
500 *** ascintr
501 *** the interrupt routine, at the end of DMA...
502 ***/
503 static void
504 ascintr(int unit)
505 {
506 struct asc_unit *scu = unittab + unit;
507 int chan_bit = 0x01 << scu->dma_num;
508
509 scu->icnt++;
510 /* ignore stray interrupts... */
511 if ( scu->flags & (OPEN |READING) != (OPEN | READING) ) {
512 /* must be after closing... */
513 scu->flags &= ~(OPEN | READING | DMA_ACTIVE | SLEEPING | SEL_COLL);
514 return;
515 }
516 if ( (scu->flags & DMA_ACTIVE) && (inb(DMA1_READY) & chan_bit) != 0) {
517 outb( ASC_CMD, ASC_STANDBY);
518 scu->flags &= ~DMA_ACTIVE;
519 /* bounce buffers... */
520 isa_dmadone(B_READ, scu->sbuf.base+scu->sbuf.wptr,
521 scu->linesize, scu->dma_num);
522 scu->sbuf.wptr += scu->linesize;
523 if (scu->sbuf.wptr >= scu->sbuf.size) scu->sbuf.wptr=0;
524 scu->sbuf.count += scu->linesize;
525 if (scu->flags & SLEEPING) {
526 scu->flags &= ~SLEEPING;
527 wakeup((caddr_t)scu);
528 }
529 if (scu->sbuf.size - scu->sbuf.count >= scu->linesize) {
530 dma_restart(scu);
531 }
532 if (scu->selp.si_pid) {
533 selwakeup(&scu->selp);
534 scu->selp.si_pid=(pid_t)0;
535 scu->selp.si_flags = 0;
536 }
537 }
538 }
539
540 /**************************************************************************
541 ***
542 *** ascopen
543 *** set open flag, set modes according to minor number
544 *** FOR RELEASE:
545 *** don't switch scanner on, wait until first read or ioctls go before
546 ***/
547
548 STATIC int
549 ascopen(dev_t dev, int flags, int fmt, struct proc *p)
550 {
551 struct asc_unit *scu;
552 int unit;
553
554 unit = UNIT(minor(dev)) & UNIT_MASK;
555 if ( unit >= NASC )
556 {
557 #ifdef ASCDEBUG
558 /* XXX lprintf isn't valid here since there is no scu. */
559 printf("asc%d.open: unconfigured unit number (max %d)\n", unit, NASC);
560 #endif
561 return ENXIO;
562 }
563 scu = unittab + unit;
564 if ( !( scu->flags & ATTACHED ) )
565 {
566 lprintf("asc%d.open: unit was not attached successfully 0x%04x\n",
567 unit, scu->flags);
568 return ENXIO;
569 }
570
571 if ( minor(dev) & DBUG_MASK )
572 scu->flags |= FLAG_DEBUG;
573 else
574 scu->flags &= ~FLAG_DEBUG;
575
576 switch(minor(dev) & FRMT_MASK) {
577 case FRMT_PBM:
578 scu->flags |= PBM_MODE;
579 lprintf("asc%d.open: pbm mode\n", unit);
580 break;
581 case FRMT_RAW:
582 lprintf("asc%d.open: raw mode\n", unit);
583 scu->flags &= ~PBM_MODE;
584 break;
585 default:
586 lprintf("asc%d.open: gray maps are not yet supported", unit);
587 return ENXIO;
588 }
589
590 lprintf("asc%d.open: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
591
592 if ( scu->flags & OPEN ) {
593 lprintf("asc%d.open: already open", unit);
594 return EBUSY;
595 }
596 if (isa_dma_acquire(scu->dma_num))
597 return(EBUSY);
598
599 scu->flags = ATTACHED | OPEN;
600
601 asc_reset(scu);
602 get_resolution(scu);
603 return SUCCESS;
604 }
605
606 static int
607 asc_startread(struct asc_unit *scu)
608 {
609 /*** from here on, things can be delayed to the first read/ioctl ***/
610 /*** this was done in sub_12... ***/
611 scu->cfg_byte= scu->cmd_byte=0; /* init scanner */
612 outb(ASC_CMD, scu->cmd_byte);
613 /*** this was done in sub_16, set scan len... ***/
614 outb(ASC_BOH, scu->portf_byte );
615 if (geomtab[scu->geometry].g_res==0) { /* color */
616 scu->cmd_byte = 0x00 ;
617 } else {
618 scu->cmd_byte = 0x90 ;
619 }
620 outb(ASC_CMD, scu->cmd_byte);
621 outb(ASC_LEN_L, scu->linesize & 0xff /* len_low */);
622 outb(ASC_LEN_H, (scu->linesize >>8) & 0xff /* len_high */);
623 /*** this was done in sub_21, config DMA ... ***/
624 scu->cfg_byte |= scu->dma_byte;
625 outb(ASC_CFG, scu->cfg_byte);
626 /*** sub_22: enable int on the scanner ***/
627 scu->cfg_byte |= scu->int_byte;
628 outb(ASC_CFG, scu->cfg_byte);
629 /*** sub_28: light on etc...***/
630 scu->cmd_byte = ASC_STANDBY;
631 outb(ASC_CMD, scu->cmd_byte);
632 tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascstrd", hz/10); /* sleep .1 sec */
633 return SUCCESS;
634 }
635
636 /**************************************************************************
637 ***
638 *** ascclose
639 *** turn off scanner, release the buffer
640 *** should probably terminate dma ops, release int and dma. lr 12mar95
641 ***/
642
643 STATIC int
644 ascclose(dev_t dev, int flags, int fmt, struct proc *p)
645 {
646 int unit = UNIT(minor(dev));
647 struct asc_unit *scu = unittab + unit;
648
649 lprintf("asc%d.close: minor %d\n",
650 unit, minor(dev));
651
652 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
653 lprintf("asc%d.close: unit was not attached successfully 0x%04x\n",
654 unit, scu->flags);
655 return ENXIO;
656 }
657 /* all this is in sub_29... */
658 /* cli(); */
659 outb(ASC_CFG, 0 ); /* don't save in CFG byte!!! */
660 scu->cmd_byte &= ~ASC_LIGHT_ON;
661 outb(ASC_CMD, scu->cmd_byte);/* light off */
662 tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascclo", hz/2); /* sleep 1/2 sec */
663 scu->cfg_byte &= ~ scu->dma_byte ; /* disable scanner dma */
664 scu->cfg_byte &= ~ scu->int_byte ; /* disable scanner int */
665 outb(ASC_CFG, scu->cfg_byte);
666 /* --- disable dma controller ? --- */
667 isa_dma_release(scu->dma_num);
668 /* --- disable interrupts on the controller (sub_24) --- */
669
670 scu->sbuf.size = INVALID;
671 scu->sbuf.rptr = INVALID;
672
673 scu->flags &= ~(FLAG_DEBUG | OPEN | READING);
674
675 return SUCCESS;
676 }
677
678 static void
679 pbm_init(struct asc_unit *scu)
680 {
681 int width = geomtab[scu->geometry].dpl;
682 int l= sprintf(scu->sbuf.base,"P4 %d %d\n", width, scu->height);
683 char *p;
684
685 scu->bcount = scu->height * width / 8 + l;
686
687 /* move header to end of sbuf */
688 scu->sbuf.rptr=scu->sbuf.size-l;
689 bcopy(scu->sbuf.base, scu->sbuf.base+scu->sbuf.rptr,l);
690 scu->sbuf.count = l;
691 if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
692 for(p = scu->sbuf.base + scu->sbuf.rptr; l; p++, l--)
693 *p = ~*p;
694 }
695 }
696 /**************************************************************************
697 ***
698 *** ascread
699 ***/
700
701 STATIC int
702 ascread(dev_t dev, struct uio *uio, int ioflag)
703 {
704 int unit = UNIT(minor(dev));
705 struct asc_unit *scu = unittab + unit;
706 size_t nbytes;
707 int sps, res;
708 unsigned char *p;
709
710 lprintf("asc%d.read: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
711
712 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
713 lprintf("asc%d.read: unit was not attached successfully 0x%04x\n",
714 unit, scu->flags);
715 return ENXIO;
716 }
717
718 if ( !(scu->flags & READING) ) { /*** first read... ***/
719 /* allocate a buffer for reading data and init things */
720 if ( (res = buffer_allocate(scu)) == SUCCESS ) scu->flags |= READING;
721 else return res;
722 asc_startread(scu);
723 if ( scu->flags & PBM_MODE ) { /* initialize for pbm mode */
724 pbm_init(scu);
725 }
726 }
727
728 lprintf("asc%d.read(before): "
729 "sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
730 unit, scu->sbuf.size, scu->sbuf.rptr,
731 scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,
732 scu->icnt);
733
734 sps=spltty();
735 if ( scu->sbuf.count == 0 ) { /* no data avail., must wait */
736 if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
737 scu->flags |= SLEEPING;
738 res = tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascread", 0);
739 scu->flags &= ~SLEEPING;
740 if ( res == 0 ) res = SUCCESS;
741 }
742 splx(sps); /* lower priority... */
743 if (scu->flags & FLAG_DEBUG)
744 tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascdly",hz);
745 lprintf("asc%d.read(after): "
746 "sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
747 unit, scu->sbuf.size, scu->sbuf.rptr,
748 scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,scu->icnt);
749
750 /* first, not more than available... */
751 nbytes = min( uio->uio_resid, scu->sbuf.count );
752 /* second, contiguous data... */
753 nbytes = min( nbytes, (scu->sbuf.size - scu->sbuf.rptr) );
754 /* third, one line (will remove this later, XXX) */
755 nbytes = min( nbytes, scu->linesize );
756 if ( (scu->flags & PBM_MODE) )
757 nbytes = min( nbytes, scu->bcount );
758 lprintf("asc%d.read: transferring 0x%x bytes\n", unit, nbytes);
759 if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
760 lprintf("asc%d.read: invert buffer\n",unit);
761 for(p = scu->sbuf.base + scu->sbuf.rptr, res=nbytes; res; p++, res--)
762 *p = ~*p;
763 }
764 res = uiomove(scu->sbuf.base + scu->sbuf.rptr, nbytes, uio);
765 if ( res != SUCCESS ) {
766 lprintf("asc%d.read: uiomove failed %d", unit, res);
767 return res;
768 }
769
770 sps=spltty();
771 scu->sbuf.rptr += nbytes;
772 if (scu->sbuf.rptr >= scu->sbuf.size) scu->sbuf.rptr=0;
773 scu->sbuf.count -= nbytes;
774 /* having moved some data, can read mode */
775 if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
776 splx(sps); /* lower priority... */
777 if ( scu->flags & PBM_MODE ) scu->bcount -= nbytes;
778
779 lprintf("asc%d.read: size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
780 unit, scu->sbuf.size, scu->sbuf.rptr, scu->bcount);
781
782 return SUCCESS;
783 }
784
785 /**************************************************************************
786 ***
787 *** ascioctl
788 ***/
789
790 STATIC int
791 ascioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p)
792 {
793 int unit = UNIT(minor(dev));
794 struct asc_unit *scu = unittab + unit;
795
796 lprintf("asc%d.ioctl: minor %d\n",
797 unit, minor(dev));
798
799 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
800 lprintf("asc%d.ioctl: unit was not attached successfully 0x%04x\n",
801 unit, scu->flags);
802 return ENXIO;
803 }
804 switch(cmd) {
805 case ASC_GRES:
806 asc_reset(scu);
807 get_resolution(scu);
808 *(int *)data=geomtab[scu->geometry].dpi;
809 lprintf("asc%d.ioctl:ASC_GRES %ddpi\n", unit, *(int *)data);
810 return SUCCESS;
811 case ASC_GWIDTH:
812 *(int *)data=geomtab[scu->geometry].dpl;
813 lprintf("asc%d.ioctl:ASC_GWIDTH %d\n", unit, *(int *)data);
814 return SUCCESS;
815 case ASC_GHEIGHT:
816 *(int *)data=scu->height;
817 lprintf("asc%d.ioctl:ASC_GHEIGHT %d\n", unit, *(int *)data);
818 return SUCCESS;
819 case ASC_SHEIGHT:
820 lprintf("asc%d.ioctl:ASC_SHEIGHT %d\n", unit, *(int *)data);
821 if ( scu->flags & READING ) {
822 lprintf("asc%d:ioctl on already reading unit\n", unit);
823 return EBUSY;
824 }
825 scu->height=*(int *)data;
826 return SUCCESS;
827 #if 0
828 case ASC_GBLEN:
829 *(int *)data=scu->blen;
830 lprintf("asc%d.ioctl:ASC_GBLEN %d\n", unit, *(int *)data);
831 return SUCCESS;
832 case ASC_SBLEN:
833 lprintf("asc%d.ioctl:ASC_SBLEN %d\n", unit, *(int *)data);
834 if (*(int *)data * geomtab[scu->geometry].dpl / 8 > MAX_BUFSIZE)
835 {
836 lprintf("asc%d:ioctl buffer size too high\n", unit);
837 return ENOMEM;
838 }
839 scu->blen=*(int *)data;
840 return SUCCESS;
841 case ASC_GBTIME:
842 *(int *)data = scu->btime / hz;
843 lprintf("asc%d.ioctl:ASC_GBTIME %d\n", unit, *(int *)data);
844 return SUCCESS;
845 case ASC_SBTIME:
846 scu->btime = *(int *)data * hz;
847 lprintf("asc%d.ioctl:ASC_SBTIME %d\n", unit, *(int *)data);
848 return SUCCESS;
849 #endif
850 default: return ENOTTY;
851 }
852 return SUCCESS;
853 }
854
855 STATIC int
856 ascpoll(dev_t dev, int events, struct proc *p)
857 {
858 int unit = UNIT(minor(dev));
859 struct asc_unit *scu = unittab + unit;
860 int sps;
861 struct proc *p1;
862 int revents = 0;
863
864 sps=spltty();
865
866 if (events & (POLLIN | POLLRDNORM))
867 if (scu->sbuf.count >0)
868 revents |= events & (POLLIN | POLLRDNORM);
869 else {
870 if (!(scu->flags & DMA_ACTIVE))
871 dma_restart(scu);
872
873 if (scu->selp.si_pid && (p1=pfind(scu->selp.si_pid))
874 && p1->p_wchan == (caddr_t)&selwait)
875 scu->selp.si_flags = SI_COLL;
876 else
877 scu->selp.si_pid = p->p_pid;
878 }
879
880 splx(sps);
881 return 0;
882 }
883
884
885 static asc_devsw_installed = 0;
886
887 static void
888 asc_drvinit(void *unused)
889 {
890 dev_t dev;
891
892 if( ! asc_devsw_installed ) {
893 dev = makedev(CDEV_MAJOR,0);
894 cdevsw_add(&dev,&asc_cdevsw,NULL);
895 asc_devsw_installed = 1;
896 }
897 }
898
899 SYSINIT(ascdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,asc_drvinit,NULL)
900
901
902 #endif /* NASC > 0 */
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