sys/platform/pc32/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: 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 $
  39  */
  40
  41 #include "use_asc.h"
  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 #include <sys/selinfo.h>
  51 #include <sys/uio.h>
  52 #include <sys/thread2.h>
  53 #include <sys/bus.h>
  54
  55 #include <machine/asc_ioctl.h>
  56
  57 #include <bus/isa/isa.h>
  58 #include <bus/isa/isa_device.h>
  59 #include <bus/isa/isavar.h>
  60 #include "ascreg.h"
  61
  62 /***
  63  *** CONSTANTS & DEFINES
  64  ***
  65  ***/
  66
  67 #define PROBE_FAIL    0
  68 #define PROBE_SUCCESS IO_ASCSIZE
  69 #define ATTACH_FAIL   0
  70 #define ATTACH_SUCCESS 1
  71 #define SUCCESS       0
  72 #define FAIL         -1
  73 #define INVALID       FAIL
  74
  75 #define DMA1_READY  0x08
  76 #define ASCDEBUG
  77 #ifdef ASCDEBUG
  78 #       define lprintf if(scu->flags & FLAG_DEBUG) kprintf
  79 #else
  80 #       define lprintf (void)
  81 #endif
  82
  83 #define TIMEOUT (hz*15)  /* timeout while reading a buffer - default value */
  84
  85 /***
  86  *** LAYOUT OF THE MINOR NUMBER
  87  ***/
  88
  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 */
  96 #define FRMT_PGM  0x18
  97
  98 /***
  99  *** THE GEMOMETRY TABLE
 100  ***/
 101
 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) */
 108 } geomtab[] = {
 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 */
 120 };
 121
 122 /***
 123  *** THE TABLE OF UNITS
 124  ***/
 125
 126 struct _sbuf {
 127   size_t  size;
 128   size_t  rptr;
 129   size_t  wptr; /* only changed in ascintr */
 130   size_t  count;
 131   char   *base;
 132 };
 133
 134 struct asc_unit {
 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)*/
 142   char   portf_byte;
 143   int flags;
 144 #define ATTACHED        0x01
 145 #define OPEN            0x02
 146 #define READING         0x04
 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 */
 156   struct  _sbuf sbuf;
 157   long    icnt;         /* interrupt count XXX for debugging */
 158   struct selinfo selp;
 159   int     height;         /* height, for pnm modes */
 160   size_t  bcount;         /* bytes to read, for pnm modes */
 161 };
 162
 163 static struct asc_unit unittab[NASC];
 164
 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!!!
 169  ***
 170  *** Note, must be DEFAULT_BLEN * samples_per_line <= MAX_BUFSIZE
 171  ***/
 172 #define MAX_BUFSIZE 0xb000 /* XXX was 0x3000 */
 173 #define DEFAULT_BLEN 16
 174
 175 /***
 176  *** THE PER-DRIVER RECORD FOR ISA.C
 177  ***/
 178 static int ascprobe (struct isa_device *isdp);
 179 static int ascattach(struct isa_device *isdp);
 180 struct isa_driver ascdriver = { ascprobe, ascattach, "asc" };
 181
 182 static void             ascintr(void *);
 183
 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_poll_t         ascpoll;
 189
 190 #define CDEV_MAJOR 71
 191
 192 static struct dev_ops asc_ops = {
 193         { "asc", CDEV_MAJOR, 0 },
 194         .d_open =       ascopen,
 195         .d_close =      ascclose,
 196         .d_read =       ascread,
 197         .d_ioctl =      ascioctl,
 198         .d_poll =       ascpoll,
 199 };
 200
 201 #define STATIC static
 202
 203 /***
 204  *** LOCALLY USED SUBROUTINES
 205  ***
 206  ***/
 207
 208 /***
 209  *** get_resolution
 210  ***    read resolution from the scanner
 211  ***/
 212 static void
 213 get_resolution(struct asc_unit *scu)
 214 {
 215     int res, i, delay;
 216
 217     res=0;
 218     scu->cmd_byte = ASC_STANDBY;
 219     outb(ASC_CMD, scu->cmd_byte);
 220     tsleep((caddr_t)scu, PCATCH, "ascres", hz/10);
 221     for(delay= 100; (res=inb(ASC_STAT)) & ASC_RDY_FLAG; delay--)
 222     {
 223         i = tsleep((caddr_t)scu, PCATCH, "ascres0", 1);
 224         if ( ( i == 0 ) || ( i == EWOULDBLOCK ) )
 225             i = SUCCESS;
 226         else
 227             break;
 228     }
 229     if (delay==0) {
 230         lprintf("asc.get_resolution: timeout completing command\n");
 231         return /*  -1 */;
 232     }
 233     /* ... actual read resolution... */
 234     res &= ASC_RES_MASK;
 235     for (i=0; geomtab[i].dpi != INVALID; i++) {
 236         if (geomtab[i].g_res == res) break;
 237     }
 238     if (geomtab[i].dpi==INVALID) {
 239         scu->geometry= i; /* INVALID; */
 240         lprintf("asc.get_resolution: wrong resolution\n");
 241     } else {
 242         lprintf("asc.get_resolution: %d dpi\n",geomtab[i].dpi);
 243         scu->geometry = i;
 244     }
 245     scu->portf_byte=0; /* default */
 246     if (geomtab[scu->geometry].g_res==0 && !(scu->thedev&FRMT_GRAY)) {
 247         /* color scanner seems to require this */
 248         scu->portf_byte=2;
 249         /* scu->geometry++; */
 250     }
 251     scu->linesize = geomtab[scu->geometry].bpl;
 252     scu->height = geomtab[scu->geometry].dpl; /* default... */
 253 }
 254
 255 /***
 256  *** buffer_allocate
 257  ***    allocate/reallocate a buffer
 258  ***    Now just checks that the preallocated buffer is large enough.
 259  ***/
 260
 261 static int
 262 buffer_allocate(struct asc_unit *scu)
 263 {
 264   size_t size, size1;
 265
 266   size = scu->blen * scu->linesize;
 267
 268   lprintf("asc.buffer_allocate: need 0x%x bytes\n", size);
 269
 270   if ( size > MAX_BUFSIZE ) {
 271       size1=size;
 272       size= ( (MAX_BUFSIZE+scu->linesize-1) / scu->linesize)*scu->linesize;
 273       lprintf("asc.buffer_allocate: 0x%x bytes are too much, try 0x%x\n",
 274           size1, size);
 275       return ENOMEM;
 276   }
 277
 278   scu->sbuf.size = size;
 279   scu->sbuf.rptr  = 0;
 280   scu->sbuf.wptr  = 0;
 281   scu->sbuf.count  = 0; /* available data for reading */
 282
 283   lprintf("asc.buffer_allocate: ok\n");
 284
 285   return SUCCESS;
 286 }
 287
 288 /*** dma_restart
 289  ***    invoked locally to start dma. Must run in a critical section
 290  ***/
 291 static void
 292 dma_restart(struct asc_unit *scu)
 293 {
 294     unsigned char al=scu->cmd_byte;
 295
 296     if (geomtab[scu->geometry].g_res==0) {/* color */
 297         isa_dmastart(BUF_CMD_READ, scu->sbuf.base+scu->sbuf.wptr,
 298             scu->linesize + 90 /* XXX */ , scu->dma_num);
 299         /*
 300          * looks like we have to set and then clear this
 301          * bit to enable the scanner to send interrupts
 302          */
 303         outb( ASC_CMD, al |= 4 ); /* seems to disable interrupts */
 304 #if 0
 305         outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
 306 #endif
 307         outb( ASC_CMD, al &= 0xfb );
 308         scu->cmd_byte = al;
 309     } else {                                    /* normal */
 310     isa_dmastart(BUF_CMD_READ, scu->sbuf.base+scu->sbuf.wptr,
 311         scu->linesize, scu->dma_num);
 312     /*** this is done in sub_20, after dmastart ? ***/
 313 #if 0
 314     outb( ASC_CMD, al |= 4 );
 315     outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
 316     outb( ASC_CMD, al &= 0xfb );
 317     scu->cmd_byte = al;
 318 #else
 319     outb( ASC_CMD, ASC_OPERATE);
 320 #endif
 321     }
 322     scu->flags |= DMA_ACTIVE;
 323 }
 324
 325 /***
 326  *** the main functions
 327  ***/
 328
 329 /*** asc_reset
 330  ***    resets the scanner and the config bytes...
 331  ***/
 332 static void
 333 asc_reset(struct asc_unit *scu)
 334 {
 335   scu->cfg_byte = 0 ; /* clear... */
 336   scu->cmd_byte = 0 ; /* clear... */
 337
 338   outb(ASC_CFG,scu->cfg_byte);  /* for safety, do this here */
 339   outb(ASC_CMD,scu->cmd_byte);  /* probably not needed */
 340   tsleep((caddr_t)scu, PCATCH, "ascres", hz/10); /* sleep .1 sec */
 341
 342   scu->blen = DEFAULT_BLEN;
 343   scu->btime = TIMEOUT;
 344   scu->height = 0 ; /* don't know better... */
 345 }
 346 /**************************************************************************
 347  ***
 348  *** ascprobe
 349  ***    read status port and check for proper configuration:
 350  ***    - if address group matches (status byte has reasonable value)
 351  ***      cannot check interrupt/dma, only clear the config byte.
 352  ***/
 353 static int
 354 ascprobe (struct isa_device *isdp)
 355 {
 356   int unit = isdp->id_unit;
 357   struct asc_unit *scu = unittab + unit;
 358   int stb;
 359
 360   scu->base = isdp->id_iobase; /*** needed by the following macros ***/
 361   scu->flags = FLAG_DEBUG;
 362
 363   if ( isdp->id_iobase < 0 ) {
 364       lprintf("asc%d.probe: no iobase given\n", unit);
 365       return PROBE_FAIL;
 366   }
 367
 368   if ((stb=inb(ASC_PROBE)) != ASC_PROBE_VALUE) {
 369       lprintf("asc%d.probe: failed, got 0x%02x instead of 0x%02x\n",
 370           unit, stb, ASC_PROBE_VALUE);
 371       return PROBE_FAIL;
 372   }
 373
 374 /*
 375  * NOTE NOTE NOTE
 376  * the new AmiScan Color board uses int 10,11,12 instead of 3,5,10
 377  * respectively. This means that the driver must act accordingly.
 378  * Unfortunately there is no easy way of telling which board one has,
 379  * other than trying to get an interrupt and noticing that it is
 380  * missing. use "option ASC_NEW_BOARD" if you have a new board.
 381  *
 382  */
 383
 384 #if ASC_NEW_BOARD
 385 #define ASC_IRQ_A       10
 386 #define ASC_IRQ_B       11
 387 #define ASC_IRQ_C       12
 388 #else
 389 #define ASC_IRQ_A       3
 390 #define ASC_IRQ_B       5
 391 #define ASC_IRQ_C       10
 392 #endif
 393
 394   switch(ffs(isdp->id_irq) - 1) {
 395     case ASC_IRQ_A :
 396       scu->int_byte = ASC_CNF_IRQ3;
 397       break;
 398     case ASC_IRQ_B :
 399       scu->int_byte = ASC_CNF_IRQ5;
 400       break;
 401     case ASC_IRQ_C :
 402       scu->int_byte = ASC_CNF_IRQ10;
 403       break;
 404 #if 0
 405     case -1:
 406       scu->int_byte = 0;
 407       lprintf("asc%d.probe: warning - going interruptless\n", unit);
 408       break;
 409 #endif
 410     default:
 411       lprintf("asc%d.probe: unsupported INT %d (only 3, 5, 10)\n",
 412                 unit, ffs(isdp->id_irq) - 1 );
 413       return PROBE_FAIL;
 414   }
 415   scu->dma_num = isdp->id_drq;
 416   switch(scu->dma_num) {
 417     case 1:
 418       scu->dma_byte = ASC_CNF_DMA1;
 419       break;
 420     case 3:
 421       scu->dma_byte = ASC_CNF_DMA3;
 422       break;
 423     default:
 424       lprintf("asc%d.probe: unsupported DMA %d (only 1 or 3)\n",
 425                 unit, scu->dma_num);
 426       return PROBE_FAIL;
 427   }
 428   asc_reset(scu);
 429 /*  lprintf("asc%d.probe: ok\n", unit); */
 430
 431   scu->flags &= ~FLAG_DEBUG;
 432   scu->icnt = 0;
 433   return PROBE_SUCCESS;
 434 }
 435
 436 /**************************************************************************
 437  ***
 438  *** ascattach
 439  ***    finish initialization of unit structure, get geometry value (?)
 440  ***/
 441
 442 static int
 443 ascattach(struct isa_device *isdp)
 444 {
 445   int unit = isdp->id_unit;
 446   struct asc_unit *scu = unittab + unit;
 447
 448   isdp->id_intr = (inthand2_t *)ascintr;
 449   scu->flags |= FLAG_DEBUG;
 450   kprintf("asc%d: [GI1904/Trust Ami-Scan Grey/Color]\n", unit);
 451
 452   /*
 453    * Initialize buffer structure.
 454    * XXX this must be done early to give a good chance of getting a
 455    * contiguous buffer.  This wastes memory.
 456    */
 457   scu->sbuf.base = contigmalloc((unsigned long)MAX_BUFSIZE, M_DEVBUF, M_NOWAIT,
 458                                 0ul, 0xfffffful, 1ul, 0x10000ul);
 459   if ( scu->sbuf.base == NULL )
 460     {
 461       lprintf("asc%d.attach: buffer allocation failed\n", unit);
 462       return ATTACH_FAIL;       /* XXX attach must not fail */
 463     }
 464   scu->sbuf.size = INVALID;
 465   scu->sbuf.rptr  = INVALID;
 466
 467   scu->flags |= ATTACHED;
 468 /*  lprintf("asc%d.attach: ok\n", unit); */
 469   scu->flags &= ~FLAG_DEBUG;
 470
 471     scu->selp.si_flags=0;
 472     scu->selp.si_pid=(pid_t)0;
 473 #define ASC_UID 0
 474 #define ASC_GID 13
 475   make_dev(&asc_ops, unit<<6, ASC_UID, ASC_GID, 0666, "asc%d", unit);
 476   make_dev(&asc_ops, ((unit<<6) + FRMT_PBM),
 477            ASC_UID,  ASC_GID, 0666, "asc%dp", unit);
 478   make_dev(&asc_ops, ((unit<<6) + DBUG_MASK),
 479            ASC_UID,  ASC_GID, 0666, "asc%dd", unit);
 480   make_dev(&asc_ops, ((unit<<6) + DBUG_MASK+FRMT_PBM),
 481            ASC_UID, ASC_GID, 0666, "asc%dpd", unit);
 482   return ATTACH_SUCCESS;
 483 }
 484
 485 /**************************************************************************
 486  ***
 487  *** ascintr
 488  ***    the interrupt routine, at the end of DMA...
 489  ***/
 490 static void
 491 ascintr(void *arg)
 492 {
 493     int unit = (int)arg;
 494     struct asc_unit *scu = unittab + unit;
 495     int chan_bit = 0x01 << scu->dma_num;
 496
 497     scu->icnt++;
 498     /* ignore stray interrupts... */
 499     if ((scu->flags & (OPEN |READING)) != (OPEN | READING) ) {
 500         /* must be after closing... */
 501         scu->flags &= ~(OPEN | READING | DMA_ACTIVE | SLEEPING | SEL_COLL);
 502         return;
 503     }
 504     if ( (scu->flags & DMA_ACTIVE) && (inb(DMA1_READY) & chan_bit) != 0) {
 505         outb( ASC_CMD, ASC_STANDBY);
 506         scu->flags &= ~DMA_ACTIVE;
 507                 /* bounce buffers... */
 508         isa_dmadone(BUF_CMD_READ, scu->sbuf.base+scu->sbuf.wptr,
 509             scu->linesize, scu->dma_num);
 510         scu->sbuf.wptr += scu->linesize;
 511         if (scu->sbuf.wptr >= scu->sbuf.size) scu->sbuf.wptr=0;
 512         scu->sbuf.count += scu->linesize;
 513         if (scu->flags & SLEEPING) {
 514             scu->flags &= ~SLEEPING;
 515             wakeup((caddr_t)scu);
 516         }
 517         if (scu->sbuf.size - scu->sbuf.count >= scu->linesize) {
 518             dma_restart(scu);
 519         }
 520         if (scu->selp.si_pid) {
 521             selwakeup(&scu->selp);
 522             scu->selp.si_pid=(pid_t)0;
 523             scu->selp.si_flags = 0;
 524         }
 525     }
 526 }
 527
 528 /**************************************************************************
 529  ***
 530  *** ascopen
 531  ***    set open flag, set modes according to minor number
 532  ***    FOR RELEASE:
 533  ***    don't switch scanner on, wait until first read or ioctls go before
 534  ***/
 535
 536 STATIC int
 537 ascopen(struct dev_open_args *ap)
 538 {
 539   cdev_t dev = ap->a_head.a_dev;
 540   struct asc_unit *scu;
 541   int unit;
 542
 543   unit = UNIT(minor(dev)) & UNIT_MASK;
 544   if ( unit >= NASC )
 545     {
 546 #ifdef ASCDEBUG
 547       /* XXX lprintf isn't valid here since there is no scu. */
 548       kprintf("asc%d.open: unconfigured unit number (max %d)\n", unit, NASC);
 549 #endif
 550       return ENXIO;
 551     }
 552   scu = unittab + unit;
 553   if ( !( scu->flags & ATTACHED ) )
 554     {
 555       lprintf("asc%d.open: unit was not attached successfully 0x%04x\n",
 556              unit, scu->flags);
 557       return ENXIO;
 558     }
 559
 560   if ( minor(dev) & DBUG_MASK )
 561     scu->flags |= FLAG_DEBUG;
 562   else
 563     scu->flags &= ~FLAG_DEBUG;
 564
 565   switch(minor(dev) & FRMT_MASK) {
 566   case FRMT_PBM:
 567     scu->flags |= PBM_MODE;
 568     lprintf("asc%d.open: pbm mode\n", unit);
 569     break;
 570   case FRMT_RAW:
 571     lprintf("asc%d.open: raw mode\n", unit);
 572     scu->flags &= ~PBM_MODE;
 573     break;
 574   default:
 575     lprintf("asc%d.open: gray maps are not yet supported", unit);
 576     return ENXIO;
 577   }
 578
 579   lprintf("asc%d.open: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
 580
 581   if ( scu->flags & OPEN ) {
 582       lprintf("asc%d.open: already open", unit);
 583       return EBUSY;
 584   }
 585   if (isa_dma_acquire(scu->dma_num))
 586       return(EBUSY);
 587
 588   scu->flags = ATTACHED | OPEN;
 589
 590   asc_reset(scu);
 591   get_resolution(scu);
 592   return SUCCESS;
 593 }
 594
 595 static int
 596 asc_startread(struct asc_unit *scu)
 597 {
 598     /*** from here on, things can be delayed to the first read/ioctl ***/
 599     /*** this was done in sub_12... ***/
 600   scu->cfg_byte= scu->cmd_byte=0;       /* init scanner */
 601   outb(ASC_CMD, scu->cmd_byte);
 602     /*** this was done in sub_16, set scan len... ***/
 603   outb(ASC_BOH, scu->portf_byte );
 604   if (geomtab[scu->geometry].g_res==0) {                /* color */
 605         scu->cmd_byte = 0x00 ;
 606   } else {
 607   scu->cmd_byte = 0x90 ;
 608   }
 609   outb(ASC_CMD, scu->cmd_byte);
 610   outb(ASC_LEN_L, scu->linesize & 0xff /* len_low */);
 611   outb(ASC_LEN_H, (scu->linesize >>8) & 0xff /* len_high */);
 612     /*** this was done in sub_21, config DMA ... ***/
 613   scu->cfg_byte |= scu->dma_byte;
 614   outb(ASC_CFG, scu->cfg_byte);
 615     /*** sub_22: enable int on the scanner ***/
 616   scu->cfg_byte |= scu->int_byte;
 617   outb(ASC_CFG, scu->cfg_byte);
 618     /*** sub_28: light on etc...***/
 619   scu->cmd_byte = ASC_STANDBY;
 620   outb(ASC_CMD, scu->cmd_byte);
 621   tsleep((caddr_t)scu, PCATCH, "ascstrd", hz/10); /* sleep .1 sec */
 622   return SUCCESS;
 623 }
 624
 625 /**************************************************************************
 626  ***
 627  *** ascclose
 628  ***    turn off scanner, release the buffer
 629  ***    should probably terminate dma ops, release int and dma. lr 12mar95
 630  ***/
 631
 632 STATIC int
 633 ascclose(struct dev_close_args *ap)
 634 {
 635   cdev_t dev = ap->a_head.a_dev;
 636   int unit = UNIT(minor(dev));
 637   struct asc_unit *scu = unittab + unit;
 638
 639   lprintf("asc%d.close: minor %d\n",
 640          unit, minor(dev));
 641
 642   if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
 643       lprintf("asc%d.close: unit was not attached successfully 0x%04x\n",
 644              unit, scu->flags);
 645       return ENXIO;
 646   }
 647     /* all this is in sub_29... */
 648   /* cli(); */
 649   outb(ASC_CFG, 0 ); /* don't save in CFG byte!!! */
 650   scu->cmd_byte &= ~ASC_LIGHT_ON;
 651   outb(ASC_CMD, scu->cmd_byte);/* light off */
 652   tsleep((caddr_t)scu, PCATCH, "ascclo", hz/2); /* sleep 1/2 sec */
 653   scu->cfg_byte &= ~ scu->dma_byte ; /* disable scanner dma */
 654   scu->cfg_byte &= ~ scu->int_byte ; /* disable scanner int */
 655   outb(ASC_CFG, scu->cfg_byte);
 656     /* --- disable dma controller ? --- */
 657   isa_dma_release(scu->dma_num);
 658     /* --- disable interrupts on the controller (sub_24) --- */
 659
 660   scu->sbuf.size = INVALID;
 661   scu->sbuf.rptr  = INVALID;
 662
 663   scu->flags &= ~(FLAG_DEBUG | OPEN | READING);
 664
 665   return SUCCESS;
 666 }
 667
 668 static void
 669 pbm_init(struct asc_unit *scu)
 670 {
 671     int width = geomtab[scu->geometry].dpl;
 672     int l= ksprintf(scu->sbuf.base,"P4 %d %d\n", width, scu->height);
 673     char *p;
 674
 675     scu->bcount = scu->height * width / 8 + l;
 676
 677       /* move header to end of sbuf */
 678     scu->sbuf.rptr=scu->sbuf.size-l;
 679     bcopy(scu->sbuf.base, scu->sbuf.base+scu->sbuf.rptr,l);
 680     scu->sbuf.count = l;
 681     if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
 682     for(p = scu->sbuf.base + scu->sbuf.rptr; l; p++, l--)
 683         *p = ~*p;
 684 }
 685 }
 686 /**************************************************************************
 687  ***
 688  *** ascread
 689  ***/
 690
 691 STATIC int
 692 ascread(struct dev_read_args *ap)
 693 {
 694   cdev_t dev = ap->a_head.a_dev;
 695   struct uio *uio = ap->a_uio;
 696   int unit = UNIT(minor(dev));
 697   struct asc_unit *scu = unittab + unit;
 698   size_t nbytes;
 699   int res;
 700   unsigned char *p;
 701
 702   lprintf("asc%d.read: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
 703
 704   if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
 705       lprintf("asc%d.read: unit was not attached successfully 0x%04x\n",
 706              unit, scu->flags);
 707       return ENXIO;
 708   }
 709
 710   if ( !(scu->flags & READING) ) { /*** first read... ***/
 711         /* allocate a buffer for reading data and init things */
 712       if ( (res = buffer_allocate(scu)) == SUCCESS ) scu->flags |= READING;
 713       else return res;
 714       asc_startread(scu);
 715       if ( scu->flags & PBM_MODE ) { /* initialize for pbm mode */
 716           pbm_init(scu);
 717       }
 718   }
 719
 720   lprintf("asc%d.read(before): "
 721       "sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
 722           unit, scu->sbuf.size, scu->sbuf.rptr,
 723           scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,
 724           scu->icnt);
 725
 726   crit_enter();
 727   if ( scu->sbuf.count == 0 ) { /* no data avail., must wait */
 728       if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
 729       scu->flags |= SLEEPING;
 730       res = tsleep((caddr_t)scu, PCATCH, "ascread", 0);
 731       scu->flags &= ~SLEEPING;
 732       if ( res == 0 ) res = SUCCESS;
 733   }
 734   crit_exit();
 735   if (scu->flags & FLAG_DEBUG)
 736       tsleep((caddr_t)scu, PCATCH, "ascdly",hz);
 737   lprintf("asc%d.read(after): "
 738       "sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
 739           unit, scu->sbuf.size, scu->sbuf.rptr,
 740           scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,scu->icnt);
 741
 742         /* first, not more than available... */
 743   nbytes = szmin(uio->uio_resid, scu->sbuf.count);
 744         /* second, contiguous data... */
 745   nbytes = szmin( nbytes, (scu->sbuf.size - scu->sbuf.rptr) );
 746         /* third, one line (will remove this later, XXX) */
 747   nbytes = szmin( nbytes, scu->linesize );
 748   if ( (scu->flags & PBM_MODE) )
 749       nbytes = szmin( nbytes, scu->bcount );
 750   lprintf("asc%d.read: transferring 0x%x bytes\n", unit, nbytes);
 751   if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
 752   lprintf("asc%d.read: invert buffer\n",unit);
 753   for(p = scu->sbuf.base + scu->sbuf.rptr, res=nbytes; res; p++, res--)
 754         *p = ~*p;
 755   }
 756   res = uiomove(scu->sbuf.base + scu->sbuf.rptr, nbytes, uio);
 757   if ( res != SUCCESS ) {
 758       lprintf("asc%d.read: uiomove failed %d", unit, res);
 759       return res;
 760   }
 761
 762   crit_enter();
 763   scu->sbuf.rptr += nbytes;
 764   if (scu->sbuf.rptr >= scu->sbuf.size) scu->sbuf.rptr=0;
 765   scu->sbuf.count -= nbytes;
 766         /* having moved some data, can read mode */
 767   if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
 768   crit_exit();
 769   if ( scu->flags & PBM_MODE ) scu->bcount -= nbytes;
 770
 771   lprintf("asc%d.read: size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
 772           unit, scu->sbuf.size, scu->sbuf.rptr, scu->bcount);
 773
 774   return SUCCESS;
 775 }
 776
 777 /**************************************************************************
 778  ***
 779  *** ascioctl
 780  ***/
 781
 782 STATIC int
 783 ascioctl(struct dev_ioctl_args *ap)
 784 {
 785   cdev_t dev = ap->a_head.a_dev;
 786   caddr_t data = ap->a_data;
 787   int unit = UNIT(minor(dev));
 788   struct asc_unit *scu = unittab + unit;
 789
 790   lprintf("asc%d.ioctl: minor %d\n",
 791          unit, minor(dev));
 792
 793   if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
 794       lprintf("asc%d.ioctl: unit was not attached successfully 0x%04x\n",
 795              unit, scu->flags);
 796       return ENXIO;
 797   }
 798   switch(ap->a_cmd) {
 799   case ASC_GRES:
 800     asc_reset(scu);
 801     get_resolution(scu);
 802     *(int *)data=geomtab[scu->geometry].dpi;
 803     lprintf("asc%d.ioctl:ASC_GRES %ddpi\n", unit, *(int *)data);
 804     return SUCCESS;
 805   case ASC_GWIDTH:
 806     *(int *)data=geomtab[scu->geometry].dpl;
 807     lprintf("asc%d.ioctl:ASC_GWIDTH %d\n", unit, *(int *)data);
 808     return SUCCESS;
 809   case ASC_GHEIGHT:
 810     *(int *)data=scu->height;
 811     lprintf("asc%d.ioctl:ASC_GHEIGHT %d\n", unit, *(int *)data);
 812     return SUCCESS;
 813   case ASC_SHEIGHT:
 814     lprintf("asc%d.ioctl:ASC_SHEIGHT %d\n", unit, *(int *)data);
 815     if ( scu->flags & READING ) {
 816         lprintf("asc%d:ioctl on already reading unit\n", unit);
 817         return EBUSY;
 818     }
 819     scu->height=*(int *)data;
 820     return SUCCESS;
 821 #if 0
 822   case ASC_GBLEN:
 823     *(int *)data=scu->blen;
 824     lprintf("asc%d.ioctl:ASC_GBLEN %d\n", unit, *(int *)data);
 825     return SUCCESS;
 826   case ASC_SBLEN:
 827     lprintf("asc%d.ioctl:ASC_SBLEN %d\n", unit, *(int *)data);
 828     if (*(int *)data * geomtab[scu->geometry].dpl / 8 > MAX_BUFSIZE)
 829       {
 830         lprintf("asc%d:ioctl buffer size too high\n", unit);
 831         return ENOMEM;
 832       }
 833     scu->blen=*(int *)data;
 834     return SUCCESS;
 835   case ASC_GBTIME:
 836     *(int *)data = scu->btime / hz;
 837     lprintf("asc%d.ioctl:ASC_GBTIME %d\n", unit, *(int *)data);
 838     return SUCCESS;
 839   case ASC_SBTIME:
 840     scu->btime = *(int *)data * hz;
 841     lprintf("asc%d.ioctl:ASC_SBTIME %d\n", unit, *(int *)data);
 842     return SUCCESS;
 843 #endif
 844   default: return ENOTTY;
 845   }
 846   return SUCCESS;
 847 }
 848
 849 STATIC int
 850 ascpoll(struct dev_poll_args *ap)
 851 {
 852     cdev_t dev = ap->a_head.a_dev;
 853     int unit = UNIT(minor(dev));
 854     struct asc_unit *scu = unittab + unit;
 855     int revents = 0;
 856
 857     crit_enter();
 858
 859     if (ap->a_events & (POLLIN | POLLRDNORM)) {
 860         if (scu->sbuf.count >0)
 861             revents |= ap->a_events & (POLLIN | POLLRDNORM);
 862         else {
 863             if (!(scu->flags & DMA_ACTIVE))
 864                 dma_restart(scu);
 865
 866             selrecord(curthread, &scu->selp);
 867         }
 868     }
 869     crit_exit();
 870     ap->a_events = revents;
 871     return (0);
 872 }