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.
9 * Copyright (c) 2008 The DragonFly Project.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by Gunther Schadow
23 * 4. The name of the author may not be used to endorse or promote products
24 * derived from this software without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 * $FreeBSD: src/sys/i386/isa/asc.c,v 1.42.2.2 2001/03/01 03:22:39 jlemon Exp $
39 * $DragonFly: src/sys/platform/pc64/isa/asc.c,v 1.1 2008/08/29 17:07:19 dillon Exp $
43 #include <sys/param.h>
44 #include <sys/systm.h>
48 #include <sys/malloc.h>
49 #include <sys/kernel.h>
51 #include <sys/selinfo.h>
53 #include <sys/thread2.h>
55 #include <machine/asc_ioctl.h>
57 #include <bus/isa/isa.h>
58 #include <bus/isa/isa_device.h>
62 *** CONSTANTS & DEFINES
67 #define PROBE_SUCCESS IO_ASCSIZE
69 #define ATTACH_SUCCESS 1
74 #define DMA1_READY 0x08
77 # define lprintf if(scu->flags & FLAG_DEBUG) kprintf
79 # define lprintf (void)
82 #define TIMEOUT (hz*15) /* timeout while reading a buffer - default value */
85 *** LAYOUT OF THE MINOR NUMBER
88 #define UNIT_MASK 0xc0 /* unit asc0 .. asc3 */
89 #define UNIT(x) (x >> 6)
90 #define DBUG_MASK 0x20
91 #define FRMT_MASK 0x18 /* output format */
92 #define FRMT_RAW 0x00 /* output bits as read from scanner */
93 #define FRMT_GRAY 0x1 /* output gray mode for color scanner */
94 #define FRMT_PBM 0x08 /* output pbm format */
98 *** THE GEMOMETRY TABLE
101 #define GREY_LINE 826 /* 825, or 826 , or 550 ??? */
102 static const struct asc_geom {
103 int dpi; /* dots per inch */
104 int dpl; /* dots per line */
105 int bpl; /* bytes per line */
106 int g_res; /* get resolution value (ASC_STAT) */
108 { 800, 3312, 414, ASC_RES_800},
109 { 700, 2896, 362, ASC_RES_700},
110 { 600, 2480, 310, ASC_RES_600},
111 { 500, 1656, 258, ASC_RES_500},
112 { 400, 1656, 207, ASC_RES_400},
113 { 300, 1240, 155, ASC_RES_300},
114 { 200, 832, 104, ASC_RES_200},
115 { 100, 416, 52, ASC_RES_100},
116 { 200, 3*GREY_LINE, 3*GREY_LINE, 0 /* returned by color scanner */},
117 { 200, GREY_LINE, GREY_LINE, 0 /* color scanner, grey mode */},
118 { INVALID, 416, 52, INVALID } /* terminator */
122 *** THE TABLE OF UNITS
128 size_t wptr; /* only changed in ascintr */
134 long thedev; /* XXX */
135 int base; /* base address */
136 int dma_num; /* dma number */
137 char dma_byte; /* mask of byte for setting DMA value */
138 char int_byte; /* mask of byte for setting int value */
139 char cfg_byte; /* mirror of byte written to config reg (ASC_CFG). */
140 char cmd_byte; /* mirror of byte written to cmd port (ASC_CMD)*/
143 #define ATTACHED 0x01
146 #define DMA_ACTIVE 0x08
147 #define SLEEPING 0x10
148 #define SEL_COLL 0x20
149 #define PBM_MODE 0x40
150 #define FLAG_DEBUG 0x80
151 int geometry; /* resolution as geomtab index */
152 int linesize; /* length of one scan line (from geom.table) */
153 int blen; /* length of buffer in lines */
154 int btime; /* timeout of buffer in seconds/hz */
156 long icnt; /* interrupt count XXX for debugging */
158 int height; /* height, for pnm modes */
159 size_t bcount; /* bytes to read, for pnm modes */
162 static struct asc_unit unittab[NASC];
164 /*** I could not find a reasonable buffer size limit other than by
165 *** experiments. MAXPHYS is obviously too much, while DEV_BSIZE and
166 *** PAGE_SIZE are really too small. There must be something wrong
167 *** with isa_dmastart/isa_dmarangecheck HELP!!!
169 *** Note, must be DEFAULT_BLEN * samples_per_line <= MAX_BUFSIZE
171 #define MAX_BUFSIZE 0xb000 /* XXX was 0x3000 */
172 #define DEFAULT_BLEN 16
175 *** THE PER-DRIVER RECORD FOR ISA.C
177 static int ascprobe (struct isa_device *isdp);
178 static int ascattach(struct isa_device *isdp);
179 struct isa_driver ascdriver = { ascprobe, ascattach, "asc" };
181 static void ascintr(void *);
183 static d_open_t ascopen;
184 static d_close_t ascclose;
185 static d_read_t ascread;
186 static d_ioctl_t ascioctl;
187 static d_poll_t ascpoll;
189 #define CDEV_MAJOR 71
191 static struct dev_ops asc_ops = {
192 { "asc", CDEV_MAJOR, 0 },
200 #define STATIC static
203 *** LOCALLY USED SUBROUTINES
209 *** read resolution from the scanner
212 get_resolution(struct asc_unit *scu)
217 scu->cmd_byte = ASC_STANDBY;
218 outb(ASC_CMD, scu->cmd_byte);
219 tsleep((caddr_t)scu, PCATCH, "ascres", hz/10);
220 for(delay= 100; (res=inb(ASC_STAT)) & ASC_RDY_FLAG; delay--)
222 i = tsleep((caddr_t)scu, PCATCH, "ascres0", 1);
223 if ( ( i == 0 ) || ( i == EWOULDBLOCK ) )
229 lprintf("asc.get_resolution: timeout completing command\n");
232 /* ... actual read resolution... */
234 for (i=0; geomtab[i].dpi != INVALID; i++) {
235 if (geomtab[i].g_res == res) break;
237 if (geomtab[i].dpi==INVALID) {
238 scu->geometry= i; /* INVALID; */
239 lprintf("asc.get_resolution: wrong resolution\n");
241 lprintf("asc.get_resolution: %d dpi\n",geomtab[i].dpi);
244 scu->portf_byte=0; /* default */
245 if (geomtab[scu->geometry].g_res==0 && !(scu->thedev&FRMT_GRAY)) {
246 /* color scanner seems to require this */
248 /* scu->geometry++; */
250 scu->linesize = geomtab[scu->geometry].bpl;
251 scu->height = geomtab[scu->geometry].dpl; /* default... */
256 *** allocate/reallocate a buffer
257 *** Now just checks that the preallocated buffer is large enough.
261 buffer_allocate(struct asc_unit *scu)
265 size = scu->blen * scu->linesize;
267 lprintf("asc.buffer_allocate: need 0x%x bytes\n", size);
269 if ( size > MAX_BUFSIZE ) {
271 size= ( (MAX_BUFSIZE+scu->linesize-1) / scu->linesize)*scu->linesize;
272 lprintf("asc.buffer_allocate: 0x%x bytes are too much, try 0x%x\n",
277 scu->sbuf.size = size;
280 scu->sbuf.count = 0; /* available data for reading */
282 lprintf("asc.buffer_allocate: ok\n");
288 *** invoked locally to start dma. Must run in a critical section
291 dma_restart(struct asc_unit *scu)
293 unsigned char al=scu->cmd_byte;
295 if (geomtab[scu->geometry].g_res==0) {/* color */
296 isa_dmastart(BUF_CMD_READ, 0, scu->sbuf.base+scu->sbuf.wptr,
297 scu->linesize + 90 /* XXX */ , scu->dma_num);
299 * looks like we have to set and then clear this
300 * bit to enable the scanner to send interrupts
302 outb( ASC_CMD, al |= 4 ); /* seems to disable interrupts */
304 outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
306 outb( ASC_CMD, al &= 0xfb );
308 } else { /* normal */
309 isa_dmastart(BUF_CMD_READ, 0, scu->sbuf.base+scu->sbuf.wptr,
310 scu->linesize, scu->dma_num);
311 /*** this is done in sub_20, after dmastart ? ***/
313 outb( ASC_CMD, al |= 4 );
314 outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
315 outb( ASC_CMD, al &= 0xfb );
318 outb( ASC_CMD, ASC_OPERATE);
321 scu->flags |= DMA_ACTIVE;
325 *** the main functions
329 *** resets the scanner and the config bytes...
332 asc_reset(struct asc_unit *scu)
334 scu->cfg_byte = 0 ; /* clear... */
335 scu->cmd_byte = 0 ; /* clear... */
337 outb(ASC_CFG,scu->cfg_byte); /* for safety, do this here */
338 outb(ASC_CMD,scu->cmd_byte); /* probably not needed */
339 tsleep((caddr_t)scu, PCATCH, "ascres", hz/10); /* sleep .1 sec */
341 scu->blen = DEFAULT_BLEN;
342 scu->btime = TIMEOUT;
343 scu->height = 0 ; /* don't know better... */
345 /**************************************************************************
348 *** read status port and check for proper configuration:
349 *** - if address group matches (status byte has reasonable value)
350 *** cannot check interrupt/dma, only clear the config byte.
353 ascprobe (struct isa_device *isdp)
355 int unit = isdp->id_unit;
356 struct asc_unit *scu = unittab + unit;
359 scu->base = isdp->id_iobase; /*** needed by the following macros ***/
360 scu->flags = FLAG_DEBUG;
362 if ( isdp->id_iobase < 0 ) {
363 lprintf("asc%d.probe: no iobase given\n", unit);
367 if ((stb=inb(ASC_PROBE)) != ASC_PROBE_VALUE) {
368 lprintf("asc%d.probe: failed, got 0x%02x instead of 0x%02x\n",
369 unit, stb, ASC_PROBE_VALUE);
375 * the new AmiScan Color board uses int 10,11,12 instead of 3,5,10
376 * respectively. This means that the driver must act accordingly.
377 * Unfortunately there is no easy way of telling which board one has,
378 * other than trying to get an interrupt and noticing that it is
379 * missing. use "option ASC_NEW_BOARD" if you have a new board.
393 switch(ffs(isdp->id_irq) - 1) {
395 scu->int_byte = ASC_CNF_IRQ3;
398 scu->int_byte = ASC_CNF_IRQ5;
401 scu->int_byte = ASC_CNF_IRQ10;
406 lprintf("asc%d.probe: warning - going interruptless\n", unit);
410 lprintf("asc%d.probe: unsupported INT %d (only 3, 5, 10)\n",
411 unit, ffs(isdp->id_irq) - 1 );
414 scu->dma_num = isdp->id_drq;
415 switch(scu->dma_num) {
417 scu->dma_byte = ASC_CNF_DMA1;
420 scu->dma_byte = ASC_CNF_DMA3;
423 lprintf("asc%d.probe: unsupported DMA %d (only 1 or 3)\n",
428 /* lprintf("asc%d.probe: ok\n", unit); */
430 scu->flags &= ~FLAG_DEBUG;
432 return PROBE_SUCCESS;
435 /**************************************************************************
438 *** finish initialization of unit structure, get geometry value (?)
442 ascattach(struct isa_device *isdp)
444 int unit = isdp->id_unit;
445 struct asc_unit *scu = unittab + unit;
447 isdp->id_intr = (inthand2_t *)ascintr;
448 scu->flags |= FLAG_DEBUG;
449 kprintf("asc%d: [GI1904/Trust Ami-Scan Grey/Color]\n", unit);
452 * Initialize buffer structure.
453 * XXX this must be done early to give a good chance of getting a
454 * contiguous buffer. This wastes memory.
456 scu->sbuf.base = contigmalloc((unsigned long)MAX_BUFSIZE, M_DEVBUF, M_NOWAIT,
457 0ul, 0xfffffful, 1ul, 0x10000ul);
458 if ( scu->sbuf.base == NULL )
460 lprintf("asc%d.attach: buffer allocation failed\n", unit);
461 return ATTACH_FAIL; /* XXX attach must not fail */
463 scu->sbuf.size = INVALID;
464 scu->sbuf.rptr = INVALID;
466 scu->flags |= ATTACHED;
467 /* lprintf("asc%d.attach: ok\n", unit); */
468 scu->flags &= ~FLAG_DEBUG;
470 scu->selp.si_flags=0;
471 scu->selp.si_pid=(pid_t)0;
474 make_dev(&asc_ops, unit<<6, ASC_UID, ASC_GID, 0666, "asc%d", unit);
475 make_dev(&asc_ops, ((unit<<6) + FRMT_PBM),
476 ASC_UID, ASC_GID, 0666, "asc%dp", unit);
477 make_dev(&asc_ops, ((unit<<6) + DBUG_MASK),
478 ASC_UID, ASC_GID, 0666, "asc%dd", unit);
479 make_dev(&asc_ops, ((unit<<6) + DBUG_MASK+FRMT_PBM),
480 ASC_UID, ASC_GID, 0666, "asc%dpd", unit);
481 return ATTACH_SUCCESS;
484 /**************************************************************************
487 *** the interrupt routine, at the end of DMA...
493 struct asc_unit *scu = unittab + unit;
494 int chan_bit = 0x01 << scu->dma_num;
497 /* ignore stray interrupts... */
498 if ((scu->flags & (OPEN |READING)) != (OPEN | READING) ) {
499 /* must be after closing... */
500 scu->flags &= ~(OPEN | READING | DMA_ACTIVE | SLEEPING | SEL_COLL);
503 if ( (scu->flags & DMA_ACTIVE) && (inb(DMA1_READY) & chan_bit) != 0) {
504 outb( ASC_CMD, ASC_STANDBY);
505 scu->flags &= ~DMA_ACTIVE;
506 /* bounce buffers... */
507 isa_dmadone(BUF_CMD_READ, 0, scu->sbuf.base+scu->sbuf.wptr,
508 scu->linesize, scu->dma_num);
509 scu->sbuf.wptr += scu->linesize;
510 if (scu->sbuf.wptr >= scu->sbuf.size) scu->sbuf.wptr=0;
511 scu->sbuf.count += scu->linesize;
512 if (scu->flags & SLEEPING) {
513 scu->flags &= ~SLEEPING;
514 wakeup((caddr_t)scu);
516 if (scu->sbuf.size - scu->sbuf.count >= scu->linesize) {
519 if (scu->selp.si_pid) {
520 selwakeup(&scu->selp);
521 scu->selp.si_pid=(pid_t)0;
522 scu->selp.si_flags = 0;
527 /**************************************************************************
530 *** set open flag, set modes according to minor number
532 *** don't switch scanner on, wait until first read or ioctls go before
536 ascopen(struct dev_open_args *ap)
538 cdev_t dev = ap->a_head.a_dev;
539 struct asc_unit *scu;
542 unit = UNIT(minor(dev)) & UNIT_MASK;
546 /* XXX lprintf isn't valid here since there is no scu. */
547 kprintf("asc%d.open: unconfigured unit number (max %d)\n", unit, NASC);
551 scu = unittab + unit;
552 if ( !( scu->flags & ATTACHED ) )
554 lprintf("asc%d.open: unit was not attached successfully 0x%04x\n",
559 if ( minor(dev) & DBUG_MASK )
560 scu->flags |= FLAG_DEBUG;
562 scu->flags &= ~FLAG_DEBUG;
564 switch(minor(dev) & FRMT_MASK) {
566 scu->flags |= PBM_MODE;
567 lprintf("asc%d.open: pbm mode\n", unit);
570 lprintf("asc%d.open: raw mode\n", unit);
571 scu->flags &= ~PBM_MODE;
574 lprintf("asc%d.open: gray maps are not yet supported", unit);
578 lprintf("asc%d.open: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
580 if ( scu->flags & OPEN ) {
581 lprintf("asc%d.open: already open", unit);
584 if (isa_dma_acquire(scu->dma_num))
587 scu->flags = ATTACHED | OPEN;
595 asc_startread(struct asc_unit *scu)
597 /*** from here on, things can be delayed to the first read/ioctl ***/
598 /*** this was done in sub_12... ***/
599 scu->cfg_byte= scu->cmd_byte=0; /* init scanner */
600 outb(ASC_CMD, scu->cmd_byte);
601 /*** this was done in sub_16, set scan len... ***/
602 outb(ASC_BOH, scu->portf_byte );
603 if (geomtab[scu->geometry].g_res==0) { /* color */
604 scu->cmd_byte = 0x00 ;
606 scu->cmd_byte = 0x90 ;
608 outb(ASC_CMD, scu->cmd_byte);
609 outb(ASC_LEN_L, scu->linesize & 0xff /* len_low */);
610 outb(ASC_LEN_H, (scu->linesize >>8) & 0xff /* len_high */);
611 /*** this was done in sub_21, config DMA ... ***/
612 scu->cfg_byte |= scu->dma_byte;
613 outb(ASC_CFG, scu->cfg_byte);
614 /*** sub_22: enable int on the scanner ***/
615 scu->cfg_byte |= scu->int_byte;
616 outb(ASC_CFG, scu->cfg_byte);
617 /*** sub_28: light on etc...***/
618 scu->cmd_byte = ASC_STANDBY;
619 outb(ASC_CMD, scu->cmd_byte);
620 tsleep((caddr_t)scu, PCATCH, "ascstrd", hz/10); /* sleep .1 sec */
624 /**************************************************************************
627 *** turn off scanner, release the buffer
628 *** should probably terminate dma ops, release int and dma. lr 12mar95
632 ascclose(struct dev_close_args *ap)
634 cdev_t dev = ap->a_head.a_dev;
635 int unit = UNIT(minor(dev));
636 struct asc_unit *scu = unittab + unit;
638 lprintf("asc%d.close: minor %d\n",
641 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
642 lprintf("asc%d.close: unit was not attached successfully 0x%04x\n",
646 /* all this is in sub_29... */
648 outb(ASC_CFG, 0 ); /* don't save in CFG byte!!! */
649 scu->cmd_byte &= ~ASC_LIGHT_ON;
650 outb(ASC_CMD, scu->cmd_byte);/* light off */
651 tsleep((caddr_t)scu, PCATCH, "ascclo", hz/2); /* sleep 1/2 sec */
652 scu->cfg_byte &= ~ scu->dma_byte ; /* disable scanner dma */
653 scu->cfg_byte &= ~ scu->int_byte ; /* disable scanner int */
654 outb(ASC_CFG, scu->cfg_byte);
655 /* --- disable dma controller ? --- */
656 isa_dma_release(scu->dma_num);
657 /* --- disable interrupts on the controller (sub_24) --- */
659 scu->sbuf.size = INVALID;
660 scu->sbuf.rptr = INVALID;
662 scu->flags &= ~(FLAG_DEBUG | OPEN | READING);
668 pbm_init(struct asc_unit *scu)
670 int width = geomtab[scu->geometry].dpl;
671 int l= ksprintf(scu->sbuf.base,"P4 %d %d\n", width, scu->height);
674 scu->bcount = scu->height * width / 8 + l;
676 /* move header to end of sbuf */
677 scu->sbuf.rptr=scu->sbuf.size-l;
678 bcopy(scu->sbuf.base, scu->sbuf.base+scu->sbuf.rptr,l);
680 if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
681 for(p = scu->sbuf.base + scu->sbuf.rptr; l; p++, l--)
685 /**************************************************************************
691 ascread(struct dev_read_args *ap)
693 cdev_t dev = ap->a_head.a_dev;
694 struct uio *uio = ap->a_uio;
695 int unit = UNIT(minor(dev));
696 struct asc_unit *scu = unittab + unit;
701 lprintf("asc%d.read: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
703 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
704 lprintf("asc%d.read: unit was not attached successfully 0x%04x\n",
709 if ( !(scu->flags & READING) ) { /*** first read... ***/
710 /* allocate a buffer for reading data and init things */
711 if ( (res = buffer_allocate(scu)) == SUCCESS ) scu->flags |= READING;
714 if ( scu->flags & PBM_MODE ) { /* initialize for pbm mode */
719 lprintf("asc%d.read(before): "
720 "sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
721 unit, scu->sbuf.size, scu->sbuf.rptr,
722 scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,
726 if ( scu->sbuf.count == 0 ) { /* no data avail., must wait */
727 if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
728 scu->flags |= SLEEPING;
729 res = tsleep((caddr_t)scu, PCATCH, "ascread", 0);
730 scu->flags &= ~SLEEPING;
731 if ( res == 0 ) res = SUCCESS;
734 if (scu->flags & FLAG_DEBUG)
735 tsleep((caddr_t)scu, PCATCH, "ascdly",hz);
736 lprintf("asc%d.read(after): "
737 "sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
738 unit, scu->sbuf.size, scu->sbuf.rptr,
739 scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,scu->icnt);
741 /* first, not more than available... */
742 nbytes = szmin(uio->uio_resid, scu->sbuf.count);
743 /* second, contiguous data... */
744 nbytes = szmin(nbytes, (scu->sbuf.size - scu->sbuf.rptr));
745 /* third, one line (will remove this later, XXX) */
746 nbytes = szmin(nbytes, scu->linesize);
747 if ( (scu->flags & PBM_MODE) )
748 nbytes = szmin(nbytes, scu->bcount);
749 lprintf("asc%d.read: transferring 0x%x bytes\n", unit, nbytes);
750 if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
751 lprintf("asc%d.read: invert buffer\n",unit);
752 for(p = scu->sbuf.base + scu->sbuf.rptr, res=nbytes; res; p++, res--)
755 res = uiomove(scu->sbuf.base + scu->sbuf.rptr, nbytes, uio);
756 if ( res != SUCCESS ) {
757 lprintf("asc%d.read: uiomove failed %d", unit, res);
762 scu->sbuf.rptr += nbytes;
763 if (scu->sbuf.rptr >= scu->sbuf.size) scu->sbuf.rptr=0;
764 scu->sbuf.count -= nbytes;
765 /* having moved some data, can read mode */
766 if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
768 if ( scu->flags & PBM_MODE ) scu->bcount -= nbytes;
770 lprintf("asc%d.read: size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
771 unit, scu->sbuf.size, scu->sbuf.rptr, scu->bcount);
776 /**************************************************************************
782 ascioctl(struct dev_ioctl_args *ap)
784 cdev_t dev = ap->a_head.a_dev;
785 caddr_t data = ap->a_data;
786 int unit = UNIT(minor(dev));
787 struct asc_unit *scu = unittab + unit;
789 lprintf("asc%d.ioctl: minor %d\n",
792 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
793 lprintf("asc%d.ioctl: unit was not attached successfully 0x%04x\n",
801 *(int *)data=geomtab[scu->geometry].dpi;
802 lprintf("asc%d.ioctl:ASC_GRES %ddpi\n", unit, *(int *)data);
805 *(int *)data=geomtab[scu->geometry].dpl;
806 lprintf("asc%d.ioctl:ASC_GWIDTH %d\n", unit, *(int *)data);
809 *(int *)data=scu->height;
810 lprintf("asc%d.ioctl:ASC_GHEIGHT %d\n", unit, *(int *)data);
813 lprintf("asc%d.ioctl:ASC_SHEIGHT %d\n", unit, *(int *)data);
814 if ( scu->flags & READING ) {
815 lprintf("asc%d:ioctl on already reading unit\n", unit);
818 scu->height=*(int *)data;
822 *(int *)data=scu->blen;
823 lprintf("asc%d.ioctl:ASC_GBLEN %d\n", unit, *(int *)data);
826 lprintf("asc%d.ioctl:ASC_SBLEN %d\n", unit, *(int *)data);
827 if (*(int *)data * geomtab[scu->geometry].dpl / 8 > MAX_BUFSIZE)
829 lprintf("asc%d:ioctl buffer size too high\n", unit);
832 scu->blen=*(int *)data;
835 *(int *)data = scu->btime / hz;
836 lprintf("asc%d.ioctl:ASC_GBTIME %d\n", unit, *(int *)data);
839 scu->btime = *(int *)data * hz;
840 lprintf("asc%d.ioctl:ASC_SBTIME %d\n", unit, *(int *)data);
843 default: return ENOTTY;
849 ascpoll(struct dev_poll_args *ap)
851 cdev_t dev = ap->a_head.a_dev;
852 int unit = UNIT(minor(dev));
853 struct asc_unit *scu = unittab + unit;
858 if (ap->a_events & (POLLIN | POLLRDNORM)) {
859 if (scu->sbuf.count >0)
860 revents |= ap->a_events & (POLLIN | POLLRDNORM);
862 if (!(scu->flags & DMA_ACTIVE))
865 selrecord(curthread, &scu->selp);
869 ap->a_events = revents;