1 /* asc.c - device driver for hand scanners
3 * Current version supports:
5 * - AmiScan (Mustek) Color and BW hand scanners (GI1904 chipset)
7 * Copyright (c) 1995 Gunther Schadow. All rights reserved.
8 * Copyright (c) 1995,1996,1997 Luigi Rizzo. All rights reserved.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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
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.
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.
37 * $FreeBSD: src/sys/i386/isa/asc.c,v 1.42.2.2 2001/03/01 03:22:39 jlemon Exp $
38 * $DragonFly: src/sys/platform/pc32/isa/asc.c,v 1.21 2008/08/02 01:14:43 dillon Exp $
42 #include <sys/param.h>
43 #include <sys/systm.h>
47 #include <sys/malloc.h>
48 #include <sys/kernel.h>
49 #include <sys/event.h>
50 #include <sys/selinfo.h>
52 #include <sys/thread2.h>
55 #include <machine/asc_ioctl.h>
57 #include <bus/isa/isa.h>
58 #include <bus/isa/isa_device.h>
59 #include <bus/isa/isavar.h>
63 *** CONSTANTS & DEFINES
68 #define PROBE_SUCCESS IO_ASCSIZE
70 #define ATTACH_SUCCESS 1
75 #define DMA1_READY 0x08
78 # define lprintf if(scu->flags & FLAG_DEBUG) kprintf
80 # define lprintf (void)
83 #define TIMEOUT (hz*15) /* timeout while reading a buffer - default value */
86 *** LAYOUT OF THE MINOR NUMBER
89 #define UNIT_MASK 0xc0 /* unit asc0 .. asc3 */
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 0x1 /* output gray mode for color scanner */
95 #define FRMT_PBM 0x08 /* output pbm format */
99 *** THE GEMOMETRY TABLE
102 #define GREY_LINE 826 /* 825, or 826 , or 550 ??? */
103 static const struct asc_geom {
104 int dpi; /* dots per inch */
105 int dpl; /* dots per line */
106 int bpl; /* bytes per line */
107 int g_res; /* get resolution value (ASC_STAT) */
109 { 800, 3312, 414, ASC_RES_800},
110 { 700, 2896, 362, ASC_RES_700},
111 { 600, 2480, 310, ASC_RES_600},
112 { 500, 1656, 258, ASC_RES_500},
113 { 400, 1656, 207, ASC_RES_400},
114 { 300, 1240, 155, ASC_RES_300},
115 { 200, 832, 104, ASC_RES_200},
116 { 100, 416, 52, ASC_RES_100},
117 { 200, 3*GREY_LINE, 3*GREY_LINE, 0 /* returned by color scanner */},
118 { 200, GREY_LINE, GREY_LINE, 0 /* color scanner, grey mode */},
119 { INVALID, 416, 52, INVALID } /* terminator */
123 *** THE TABLE OF UNITS
129 size_t wptr; /* only changed in ascintr */
135 long thedev; /* XXX */
136 int base; /* base address */
137 int dma_num; /* dma number */
138 char dma_byte; /* mask of byte for setting DMA value */
139 char int_byte; /* mask of byte for setting int value */
140 char cfg_byte; /* mirror of byte written to config reg (ASC_CFG). */
141 char cmd_byte; /* mirror of byte written to cmd port (ASC_CMD)*/
144 #define ATTACHED 0x01
147 #define DMA_ACTIVE 0x08
148 #define SLEEPING 0x10
149 #define SEL_COLL 0x20
150 #define PBM_MODE 0x40
151 #define FLAG_DEBUG 0x80
152 int geometry; /* resolution as geomtab index */
153 int linesize; /* length of one scan line (from geom.table) */
154 int blen; /* length of buffer in lines */
155 int btime; /* timeout of buffer in seconds/hz */
157 long icnt; /* interrupt count XXX for debugging */
159 int height; /* height, for pnm modes */
160 size_t bcount; /* bytes to read, for pnm modes */
163 static struct asc_unit unittab[NASC];
165 /*** I could not find a reasonable buffer size limit other than by
166 *** experiments. MAXPHYS is obviously too much, while DEV_BSIZE and
167 *** PAGE_SIZE are really too small. There must be something wrong
168 *** with isa_dmastart/isa_dmarangecheck HELP!!!
170 *** Note, must be DEFAULT_BLEN * samples_per_line <= MAX_BUFSIZE
172 #define MAX_BUFSIZE 0xb000 /* XXX was 0x3000 */
173 #define DEFAULT_BLEN 16
176 *** THE PER-DRIVER RECORD FOR ISA.C
178 static int ascprobe (struct isa_device *isdp);
179 static int ascattach(struct isa_device *isdp);
180 struct isa_driver ascdriver = { ascprobe, ascattach, "asc" };
182 static void ascintr(void *);
184 static d_open_t ascopen;
185 static d_close_t ascclose;
186 static d_read_t ascread;
187 static d_ioctl_t ascioctl;
188 static d_kqfilter_t asckqfilter;
190 static void ascfilter_detach(struct knote *kn);
191 static int ascfilter(struct knote *kn, long hint);
193 #define CDEV_MAJOR 71
195 static struct dev_ops asc_ops = {
196 { "asc", CDEV_MAJOR, D_KQFILTER },
201 .d_kqfilter = asckqfilter
204 #define STATIC static
207 *** LOCALLY USED SUBROUTINES
213 *** read resolution from the scanner
216 get_resolution(struct asc_unit *scu)
221 scu->cmd_byte = ASC_STANDBY;
222 outb(ASC_CMD, scu->cmd_byte);
223 tsleep((caddr_t)scu, PCATCH, "ascres", hz/10);
224 for(delay= 100; (res=inb(ASC_STAT)) & ASC_RDY_FLAG; delay--)
226 i = tsleep((caddr_t)scu, PCATCH, "ascres0", 1);
227 if ( ( i == 0 ) || ( i == EWOULDBLOCK ) )
233 lprintf("asc.get_resolution: timeout completing command\n");
236 /* ... actual read resolution... */
238 for (i=0; geomtab[i].dpi != INVALID; i++) {
239 if (geomtab[i].g_res == res) break;
241 if (geomtab[i].dpi==INVALID) {
242 scu->geometry= i; /* INVALID; */
243 lprintf("asc.get_resolution: wrong resolution\n");
245 lprintf("asc.get_resolution: %d dpi\n",geomtab[i].dpi);
248 scu->portf_byte=0; /* default */
249 if (geomtab[scu->geometry].g_res==0 && !(scu->thedev&FRMT_GRAY)) {
250 /* color scanner seems to require this */
252 /* scu->geometry++; */
254 scu->linesize = geomtab[scu->geometry].bpl;
255 scu->height = geomtab[scu->geometry].dpl; /* default... */
260 *** allocate/reallocate a buffer
261 *** Now just checks that the preallocated buffer is large enough.
265 buffer_allocate(struct asc_unit *scu)
269 size = scu->blen * scu->linesize;
271 lprintf("asc.buffer_allocate: need 0x%x bytes\n", size);
273 if ( size > MAX_BUFSIZE ) {
275 size= ( (MAX_BUFSIZE+scu->linesize-1) / scu->linesize)*scu->linesize;
276 lprintf("asc.buffer_allocate: 0x%x bytes are too much, try 0x%x\n",
281 scu->sbuf.size = size;
284 scu->sbuf.count = 0; /* available data for reading */
286 lprintf("asc.buffer_allocate: ok\n");
292 *** invoked locally to start dma. Must run in a critical section
295 dma_restart(struct asc_unit *scu)
297 unsigned char al=scu->cmd_byte;
299 if (geomtab[scu->geometry].g_res==0) {/* color */
300 isa_dmastart(BUF_CMD_READ, scu->sbuf.base+scu->sbuf.wptr,
301 scu->linesize + 90 /* XXX */ , scu->dma_num);
303 * looks like we have to set and then clear this
304 * bit to enable the scanner to send interrupts
306 outb( ASC_CMD, al |= 4 ); /* seems to disable interrupts */
308 outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
310 outb( ASC_CMD, al &= 0xfb );
312 } else { /* normal */
313 isa_dmastart(BUF_CMD_READ, scu->sbuf.base+scu->sbuf.wptr,
314 scu->linesize, scu->dma_num);
315 /*** this is done in sub_20, after dmastart ? ***/
317 outb( ASC_CMD, al |= 4 );
318 outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
319 outb( ASC_CMD, al &= 0xfb );
322 outb( ASC_CMD, ASC_OPERATE);
325 scu->flags |= DMA_ACTIVE;
329 *** the main functions
333 *** resets the scanner and the config bytes...
336 asc_reset(struct asc_unit *scu)
338 scu->cfg_byte = 0 ; /* clear... */
339 scu->cmd_byte = 0 ; /* clear... */
341 outb(ASC_CFG,scu->cfg_byte); /* for safety, do this here */
342 outb(ASC_CMD,scu->cmd_byte); /* probably not needed */
343 tsleep((caddr_t)scu, PCATCH, "ascres", hz/10); /* sleep .1 sec */
345 scu->blen = DEFAULT_BLEN;
346 scu->btime = TIMEOUT;
347 scu->height = 0 ; /* don't know better... */
349 /**************************************************************************
352 *** read status port and check for proper configuration:
353 *** - if address group matches (status byte has reasonable value)
354 *** cannot check interrupt/dma, only clear the config byte.
357 ascprobe (struct isa_device *isdp)
359 int unit = isdp->id_unit;
360 struct asc_unit *scu = unittab + unit;
363 scu->base = isdp->id_iobase; /*** needed by the following macros ***/
364 scu->flags = FLAG_DEBUG;
366 if ( isdp->id_iobase < 0 ) {
367 lprintf("asc%d.probe: no iobase given\n", unit);
371 if ((stb=inb(ASC_PROBE)) != ASC_PROBE_VALUE) {
372 lprintf("asc%d.probe: failed, got 0x%02x instead of 0x%02x\n",
373 unit, stb, ASC_PROBE_VALUE);
379 * the new AmiScan Color board uses int 10,11,12 instead of 3,5,10
380 * respectively. This means that the driver must act accordingly.
381 * Unfortunately there is no easy way of telling which board one has,
382 * other than trying to get an interrupt and noticing that it is
383 * missing. use "option ASC_NEW_BOARD" if you have a new board.
397 switch(ffs(isdp->id_irq) - 1) {
399 scu->int_byte = ASC_CNF_IRQ3;
402 scu->int_byte = ASC_CNF_IRQ5;
405 scu->int_byte = ASC_CNF_IRQ10;
410 lprintf("asc%d.probe: warning - going interruptless\n", unit);
414 lprintf("asc%d.probe: unsupported INT %d (only 3, 5, 10)\n",
415 unit, ffs(isdp->id_irq) - 1 );
418 scu->dma_num = isdp->id_drq;
419 switch(scu->dma_num) {
421 scu->dma_byte = ASC_CNF_DMA1;
424 scu->dma_byte = ASC_CNF_DMA3;
427 lprintf("asc%d.probe: unsupported DMA %d (only 1 or 3)\n",
432 /* lprintf("asc%d.probe: ok\n", unit); */
434 scu->flags &= ~FLAG_DEBUG;
436 return PROBE_SUCCESS;
439 /**************************************************************************
442 *** finish initialization of unit structure, get geometry value (?)
446 ascattach(struct isa_device *isdp)
448 int unit = isdp->id_unit;
449 struct asc_unit *scu = unittab + unit;
451 isdp->id_intr = (inthand2_t *)ascintr;
452 scu->flags |= FLAG_DEBUG;
453 kprintf("asc%d: [GI1904/Trust Ami-Scan Grey/Color]\n", unit);
456 * Initialize buffer structure.
457 * XXX this must be done early to give a good chance of getting a
458 * contiguous buffer. This wastes memory.
460 scu->sbuf.base = contigmalloc((unsigned long)MAX_BUFSIZE, M_DEVBUF, M_NOWAIT,
461 0ul, 0xfffffful, 1ul, 0x10000ul);
462 if ( scu->sbuf.base == NULL )
464 lprintf("asc%d.attach: buffer allocation failed\n", unit);
465 return ATTACH_FAIL; /* XXX attach must not fail */
467 scu->sbuf.size = INVALID;
468 scu->sbuf.rptr = INVALID;
470 scu->flags |= ATTACHED;
471 /* lprintf("asc%d.attach: ok\n", unit); */
472 scu->flags &= ~FLAG_DEBUG;
474 scu->selp.si_flags=0;
475 scu->selp.si_pid=(pid_t)0;
478 make_dev(&asc_ops, unit<<6, ASC_UID, ASC_GID, 0666, "asc%d", unit);
479 make_dev(&asc_ops, ((unit<<6) + FRMT_PBM),
480 ASC_UID, ASC_GID, 0666, "asc%dp", unit);
481 make_dev(&asc_ops, ((unit<<6) + DBUG_MASK),
482 ASC_UID, ASC_GID, 0666, "asc%dd", unit);
483 make_dev(&asc_ops, ((unit<<6) + DBUG_MASK+FRMT_PBM),
484 ASC_UID, ASC_GID, 0666, "asc%dpd", unit);
485 return ATTACH_SUCCESS;
488 /**************************************************************************
491 *** the interrupt routine, at the end of DMA...
497 struct asc_unit *scu = unittab + unit;
498 int chan_bit = 0x01 << scu->dma_num;
501 /* ignore stray interrupts... */
502 if ((scu->flags & (OPEN |READING)) != (OPEN | READING) ) {
503 /* must be after closing... */
504 scu->flags &= ~(OPEN | READING | DMA_ACTIVE | SLEEPING | SEL_COLL);
507 if ( (scu->flags & DMA_ACTIVE) && (inb(DMA1_READY) & chan_bit) != 0) {
508 outb( ASC_CMD, ASC_STANDBY);
509 scu->flags &= ~DMA_ACTIVE;
510 /* bounce buffers... */
511 isa_dmadone(BUF_CMD_READ, scu->sbuf.base+scu->sbuf.wptr,
512 scu->linesize, scu->dma_num);
513 scu->sbuf.wptr += scu->linesize;
514 if (scu->sbuf.wptr >= scu->sbuf.size) scu->sbuf.wptr=0;
515 scu->sbuf.count += scu->linesize;
516 if (scu->flags & SLEEPING) {
517 scu->flags &= ~SLEEPING;
518 wakeup((caddr_t)scu);
520 if (scu->sbuf.size - scu->sbuf.count >= scu->linesize) {
523 if (scu->selp.si_pid) {
524 selwakeup(&scu->selp);
525 scu->selp.si_pid=(pid_t)0;
526 scu->selp.si_flags = 0;
531 /**************************************************************************
534 *** set open flag, set modes according to minor number
536 *** don't switch scanner on, wait until first read or ioctls go before
540 ascopen(struct dev_open_args *ap)
542 cdev_t dev = ap->a_head.a_dev;
543 struct asc_unit *scu;
546 unit = UNIT(minor(dev)) & UNIT_MASK;
550 /* XXX lprintf isn't valid here since there is no scu. */
551 kprintf("asc%d.open: unconfigured unit number (max %d)\n", unit, NASC);
555 scu = unittab + unit;
556 if ( !( scu->flags & ATTACHED ) )
558 lprintf("asc%d.open: unit was not attached successfully 0x%04x\n",
563 if ( minor(dev) & DBUG_MASK )
564 scu->flags |= FLAG_DEBUG;
566 scu->flags &= ~FLAG_DEBUG;
568 switch(minor(dev) & FRMT_MASK) {
570 scu->flags |= PBM_MODE;
571 lprintf("asc%d.open: pbm mode\n", unit);
574 lprintf("asc%d.open: raw mode\n", unit);
575 scu->flags &= ~PBM_MODE;
578 lprintf("asc%d.open: gray maps are not yet supported", unit);
582 lprintf("asc%d.open: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
584 if ( scu->flags & OPEN ) {
585 lprintf("asc%d.open: already open", unit);
588 if (isa_dma_acquire(scu->dma_num))
591 scu->flags = ATTACHED | OPEN;
599 asc_startread(struct asc_unit *scu)
601 /*** from here on, things can be delayed to the first read/ioctl ***/
602 /*** this was done in sub_12... ***/
603 scu->cfg_byte= scu->cmd_byte=0; /* init scanner */
604 outb(ASC_CMD, scu->cmd_byte);
605 /*** this was done in sub_16, set scan len... ***/
606 outb(ASC_BOH, scu->portf_byte );
607 if (geomtab[scu->geometry].g_res==0) { /* color */
608 scu->cmd_byte = 0x00 ;
610 scu->cmd_byte = 0x90 ;
612 outb(ASC_CMD, scu->cmd_byte);
613 outb(ASC_LEN_L, scu->linesize & 0xff /* len_low */);
614 outb(ASC_LEN_H, (scu->linesize >>8) & 0xff /* len_high */);
615 /*** this was done in sub_21, config DMA ... ***/
616 scu->cfg_byte |= scu->dma_byte;
617 outb(ASC_CFG, scu->cfg_byte);
618 /*** sub_22: enable int on the scanner ***/
619 scu->cfg_byte |= scu->int_byte;
620 outb(ASC_CFG, scu->cfg_byte);
621 /*** sub_28: light on etc...***/
622 scu->cmd_byte = ASC_STANDBY;
623 outb(ASC_CMD, scu->cmd_byte);
624 tsleep((caddr_t)scu, PCATCH, "ascstrd", hz/10); /* sleep .1 sec */
628 /**************************************************************************
631 *** turn off scanner, release the buffer
632 *** should probably terminate dma ops, release int and dma. lr 12mar95
636 ascclose(struct dev_close_args *ap)
638 cdev_t dev = ap->a_head.a_dev;
639 int unit = UNIT(minor(dev));
640 struct asc_unit *scu = unittab + unit;
642 lprintf("asc%d.close: minor %d\n",
645 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
646 lprintf("asc%d.close: unit was not attached successfully 0x%04x\n",
650 /* all this is in sub_29... */
652 outb(ASC_CFG, 0 ); /* don't save in CFG byte!!! */
653 scu->cmd_byte &= ~ASC_LIGHT_ON;
654 outb(ASC_CMD, scu->cmd_byte);/* light off */
655 tsleep((caddr_t)scu, PCATCH, "ascclo", hz/2); /* sleep 1/2 sec */
656 scu->cfg_byte &= ~ scu->dma_byte ; /* disable scanner dma */
657 scu->cfg_byte &= ~ scu->int_byte ; /* disable scanner int */
658 outb(ASC_CFG, scu->cfg_byte);
659 /* --- disable dma controller ? --- */
660 isa_dma_release(scu->dma_num);
661 /* --- disable interrupts on the controller (sub_24) --- */
663 scu->sbuf.size = INVALID;
664 scu->sbuf.rptr = INVALID;
666 scu->flags &= ~(FLAG_DEBUG | OPEN | READING);
672 pbm_init(struct asc_unit *scu)
674 int width = geomtab[scu->geometry].dpl;
675 int l= ksprintf(scu->sbuf.base,"P4 %d %d\n", width, scu->height);
678 scu->bcount = scu->height * width / 8 + l;
680 /* move header to end of sbuf */
681 scu->sbuf.rptr=scu->sbuf.size-l;
682 bcopy(scu->sbuf.base, scu->sbuf.base+scu->sbuf.rptr,l);
684 if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
685 for(p = scu->sbuf.base + scu->sbuf.rptr; l; p++, l--)
689 /**************************************************************************
695 ascread(struct dev_read_args *ap)
697 cdev_t dev = ap->a_head.a_dev;
698 struct uio *uio = ap->a_uio;
699 int unit = UNIT(minor(dev));
700 struct asc_unit *scu = unittab + unit;
705 lprintf("asc%d.read: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
707 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
708 lprintf("asc%d.read: unit was not attached successfully 0x%04x\n",
713 if ( !(scu->flags & READING) ) { /*** first read... ***/
714 /* allocate a buffer for reading data and init things */
715 if ( (res = buffer_allocate(scu)) == SUCCESS ) scu->flags |= READING;
718 if ( scu->flags & PBM_MODE ) { /* initialize for pbm mode */
723 lprintf("asc%d.read(before): "
724 "sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
725 unit, scu->sbuf.size, scu->sbuf.rptr,
726 scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,
730 if ( scu->sbuf.count == 0 ) { /* no data avail., must wait */
731 if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
732 scu->flags |= SLEEPING;
733 res = tsleep((caddr_t)scu, PCATCH, "ascread", 0);
734 scu->flags &= ~SLEEPING;
735 if ( res == 0 ) res = SUCCESS;
738 if (scu->flags & FLAG_DEBUG)
739 tsleep((caddr_t)scu, PCATCH, "ascdly",hz);
740 lprintf("asc%d.read(after): "
741 "sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
742 unit, scu->sbuf.size, scu->sbuf.rptr,
743 scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,scu->icnt);
745 /* first, not more than available... */
746 nbytes = szmin(uio->uio_resid, scu->sbuf.count);
747 /* second, contiguous data... */
748 nbytes = szmin( nbytes, (scu->sbuf.size - scu->sbuf.rptr) );
749 /* third, one line (will remove this later, XXX) */
750 nbytes = szmin( nbytes, scu->linesize );
751 if ( (scu->flags & PBM_MODE) )
752 nbytes = szmin( nbytes, scu->bcount );
753 lprintf("asc%d.read: transferring 0x%x bytes\n", unit, nbytes);
754 if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
755 lprintf("asc%d.read: invert buffer\n",unit);
756 for(p = scu->sbuf.base + scu->sbuf.rptr, res=nbytes; res; p++, res--)
759 res = uiomove(scu->sbuf.base + scu->sbuf.rptr, nbytes, uio);
760 if ( res != SUCCESS ) {
761 lprintf("asc%d.read: uiomove failed %d", unit, res);
766 scu->sbuf.rptr += nbytes;
767 if (scu->sbuf.rptr >= scu->sbuf.size) scu->sbuf.rptr=0;
768 scu->sbuf.count -= nbytes;
769 /* having moved some data, can read mode */
770 if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
772 if ( scu->flags & PBM_MODE ) scu->bcount -= nbytes;
774 lprintf("asc%d.read: size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
775 unit, scu->sbuf.size, scu->sbuf.rptr, scu->bcount);
780 /**************************************************************************
786 ascioctl(struct dev_ioctl_args *ap)
788 cdev_t dev = ap->a_head.a_dev;
789 caddr_t data = ap->a_data;
790 int unit = UNIT(minor(dev));
791 struct asc_unit *scu = unittab + unit;
793 lprintf("asc%d.ioctl: minor %d\n",
796 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
797 lprintf("asc%d.ioctl: unit was not attached successfully 0x%04x\n",
805 *(int *)data=geomtab[scu->geometry].dpi;
806 lprintf("asc%d.ioctl:ASC_GRES %ddpi\n", unit, *(int *)data);
809 *(int *)data=geomtab[scu->geometry].dpl;
810 lprintf("asc%d.ioctl:ASC_GWIDTH %d\n", unit, *(int *)data);
813 *(int *)data=scu->height;
814 lprintf("asc%d.ioctl:ASC_GHEIGHT %d\n", unit, *(int *)data);
817 lprintf("asc%d.ioctl:ASC_SHEIGHT %d\n", unit, *(int *)data);
818 if ( scu->flags & READING ) {
819 lprintf("asc%d:ioctl on already reading unit\n", unit);
822 scu->height=*(int *)data;
826 *(int *)data=scu->blen;
827 lprintf("asc%d.ioctl:ASC_GBLEN %d\n", unit, *(int *)data);
830 lprintf("asc%d.ioctl:ASC_SBLEN %d\n", unit, *(int *)data);
831 if (*(int *)data * geomtab[scu->geometry].dpl / 8 > MAX_BUFSIZE)
833 lprintf("asc%d:ioctl buffer size too high\n", unit);
836 scu->blen=*(int *)data;
839 *(int *)data = scu->btime / hz;
840 lprintf("asc%d.ioctl:ASC_GBTIME %d\n", unit, *(int *)data);
843 scu->btime = *(int *)data * hz;
844 lprintf("asc%d.ioctl:ASC_SBTIME %d\n", unit, *(int *)data);
847 default: return ENOTTY;
852 static struct filterops ascfiltops =
853 { 1, NULL, ascfilter_detach, ascfilter };
856 asckqfilter(struct dev_kqfilter_args *ap)
858 cdev_t dev = ap->a_head.a_dev;
859 int unit = UNIT(minor(dev));
860 struct asc_unit *scu = unittab + unit;
861 struct knote *kn = ap->a_kn;
866 switch (kn->kn_filter) {
868 kn->kn_fop = &ascfiltops;
869 kn->kn_hook = (caddr_t)scu;
872 ap->a_result = EOPNOTSUPP;
877 klist = &scu->selp.si_note;
878 SLIST_INSERT_HEAD(klist, kn, kn_selnext);
885 ascfilter_detach(struct knote *kn)
887 struct asc_unit *scu = (struct asc_unit *)kn->kn_hook;
891 klist = &scu->selp.si_note;
892 SLIST_REMOVE(klist, kn, knote, kn_selnext);
897 ascfilter(struct knote *kn, long hint)
899 struct asc_unit *scu = (struct asc_unit *)kn->kn_hook;
903 if (scu->sbuf.count >0)
906 if (!(scu->flags & DMA_ACTIVE))