sys/i386/gnu/isa/dgb.c

   1 /*-
   2  *  dgb.c $FreeBSD: src/sys/gnu/i386/isa/dgb.c,v 1.56.2.1 2001/02/26 04:23:09 jlemon Exp $
   3  *  dgb.c $DragonFly: src/sys/i386/gnu/isa/Attic/dgb.c,v 1.12 2004/06/02 13:49:46 joerg Exp $
   4  *
   5  *  Digiboard driver.
   6  *
   7  *  Stage 1. "Better than nothing".
   8  *  Stage 2. "Gee, it works!".
   9  *
  10  *  Based on sio driver by Bruce Evans and on Linux driver by Troy
  11  *  De Jongh <troyd@digibd.com> or <troyd@skypoint.com>
  12  *  which is under GNU General Public License version 2 so this driver
  13  *  is forced to be under GPL 2 too.
  14  *
  15  *  Written by Serge Babkin,
  16  *      Joint Stock Commercial Bank "Chelindbank"
  17  *      (Chelyabinsk, Russia)
  18  *      babkin@hq.icb.chel.su
  19  *
  20  *  Assorted hacks to make it more functional and working under 3.0-current.
  21  *  Fixed broken routines to prevent processes hanging on closed (thanks
  22  *  to Bruce for his patience and assistance). Thanks also to Maxim Bolotin
  23  *  <max@run.net> for his patches which did most of the work to get this
  24  *  running under 2.2/3.0-current.
  25  *  Implemented ioctls: TIOCMSDTRWAIT, TIOCMGDTRWAIT, TIOCTIMESTAMP &
  26  *  TIOCDCDTIMESTAMP.
  27  *  Sysctl debug flag is now a bitflag, to filter noise during debugging.
  28  *      David L. Nugent <davidn@blaze.net.au>
  29  */
  30
  31 #include "opt_compat.h"
  32 #include "opt_dgb.h"
  33
  34 #include "use_dgb.h"
  35
  36 /* Helg: i.e.25 times per sec board will be polled */
  37 #define POLLSPERSEC 25
  38 /* How many charactes can we write to input tty rawq */
  39 #define DGB_IBUFSIZE (TTYHOG-100)
  40
  41 /* the overall number of ports controlled by this driver */
  42
  43 #ifndef NDGBPORTS
  44 #       define NDGBPORTS (NDGB*16)
  45 #endif
  46
  47 #include <sys/param.h>
  48 #include <sys/systm.h>
  49 #include <sys/tty.h>
  50 #include <sys/proc.h>
  51 #include <sys/conf.h>
  52 #include <sys/dkstat.h>
  53 #include <sys/fcntl.h>
  54 #include <sys/kernel.h>
  55 #include <sys/sysctl.h>
  56
  57 #include <machine/clock.h>
  58
  59 #include <vm/vm.h>
  60 #include <vm/pmap.h>
  61
  62 #include <bus/isa/i386/isa_device.h>
  63
  64 #include "dgbios.h"
  65 #include "dgfep.h"
  66
  67 #define DGB_DEBUG               /* Enable debugging info via sysctl */
  68 #include "dgreg.h"
  69
  70 #define CALLOUT_MASK            0x80
  71 #define CONTROL_MASK            0x60
  72 #define CONTROL_INIT_STATE      0x20
  73 #define CONTROL_LOCK_STATE      0x40
  74 #define UNIT_MASK                       0x30000
  75 #define PORT_MASK                       0x1F
  76 #define DEV_TO_UNIT(dev)        (MINOR_TO_UNIT(minor(dev)))
  77 #define MINOR_MAGIC_MASK        (CALLOUT_MASK | CONTROL_MASK)
  78 #define MINOR_TO_UNIT(mynor)    (((mynor) & UNIT_MASK)>>16)
  79 #define MINOR_TO_PORT(mynor)    ((mynor) & PORT_MASK)
  80
  81 /* types.  XXX - should be elsewhere */
  82 typedef u_char  bool_t;         /* boolean */
  83
  84 /* digiboard port structure */
  85 struct dgb_p {
  86         bool_t  status;
  87
  88         u_char unit;           /* board unit number */
  89         u_char pnum;           /* port number */
  90         u_char omodem;         /* FEP output modem status     */
  91         u_char imodem;         /* FEP input modem status      */
  92         u_char modemfake;      /* Modem values to be forced   */
  93         u_char modem;          /* Force values                */
  94         u_char hflow;
  95         u_char dsr;
  96         u_char dcd;
  97         u_char stopc;
  98         u_char startc;
  99         u_char stopca;
 100         u_char startca;
 101         u_char fepstopc;
 102         u_char fepstartc;
 103         u_char fepstopca;
 104         u_char fepstartca;
 105         u_char txwin;
 106         u_char rxwin;
 107         ushort fepiflag;
 108         ushort fepcflag;
 109         ushort fepoflag;
 110         ushort txbufhead;
 111         ushort txbufsize;
 112         ushort rxbufhead;
 113         ushort rxbufsize;
 114         int close_delay;
 115         int count;
 116         int blocked_open;
 117         int event;
 118         int asyncflags;
 119         u_long statusflags;
 120         volatile u_char *txptr;
 121         volatile u_char *rxptr;
 122         volatile struct board_chan *brdchan;
 123         struct tty *tty;
 124
 125         bool_t  active_out;     /* nonzero if the callout device is open */
 126         u_int   wopeners;       /* # processes waiting for DCD in open() */
 127
 128         /* Initial state. */
 129         struct termios  it_in;  /* should be in struct tty */
 130         struct termios  it_out;
 131
 132         /* Lock state. */
 133         struct termios  lt_in;  /* should be in struct tty */
 134         struct termios  lt_out;
 135
 136         bool_t  do_timestamp;
 137         bool_t  do_dcd_timestamp;
 138         struct timeval  timestamp;
 139         struct timeval  dcd_timestamp;
 140
 141         /* flags of state, are used in sleep() too */
 142         u_char closing; /* port is being closed now */
 143         u_char draining; /* port is being drained now */
 144         u_char used;    /* port is being used now */
 145         u_char mustdrain; /* data must be waited to drain in dgbparam() */
 146 };
 147
 148 /* Digiboard per-board structure */
 149 struct dgb_softc {
 150         /* struct board_info */
 151         u_char status;  /* status: DISABLED/ENABLED */
 152         u_char unit;    /* unit number */
 153         u_char type;    /* type of card: PCXE, PCXI, PCXEVE */
 154         u_char altpin;  /* do we need alternate pin setting ? */
 155         int numports;   /* number of ports on card */
 156         int port;       /* I/O port */
 157         u_char *vmem; /* virtual memory address */
 158         long pmem; /* physical memory address */
 159         int mem_seg;  /* internal memory segment */
 160         struct dgb_p *ports;    /* pointer to array of port descriptors */
 161         struct tty *ttys;       /* pointer to array of TTY structures */
 162         volatile struct global_data *mailbox;
 163         };
 164
 165
 166 static struct dgb_softc dgb_softc[NDGB];
 167 static struct dgb_p dgb_ports[NDGBPORTS];
 168 static struct tty dgb_tty[NDGBPORTS];
 169
 170 /*
 171  * The public functions in the com module ought to be declared in a com-driver
 172  * system header.
 173  */
 174
 175 /* Interrupt handling entry points. */
 176 static void     dgbpoll         (void *unit_c);
 177
 178 /* Device switch entry points. */
 179 #define dgbreset        noreset
 180 #define dgbmmap         nommap
 181 #define dgbstrategy     nostrategy
 182
 183 static  int     dgbattach       (struct isa_device *dev);
 184 static  int     dgbprobe        (struct isa_device *dev);
 185
 186 static void fepcmd(struct dgb_p *port, unsigned cmd, unsigned op1, unsigned op2,
 187         unsigned ncmds, unsigned bytecmd);
 188
 189 static  void    dgbstart        (struct tty *tp);
 190 static  void    dgbstop         (struct tty *tp, int rw);
 191 static  int     dgbparam        (struct tty *tp, struct termios *t);
 192 static  void    dgbhardclose    (struct dgb_p *port);
 193 static  void    dgb_drain_or_flush      (struct dgb_p *port);
 194 static  int     dgbdrain        (struct dgb_p *port);
 195 static  void    dgb_pause       (void *chan);
 196 static  void    wakeflush       (void *p);
 197 static  void    disc_optim      (struct tty     *tp, struct termios *t);
 198
 199
 200 struct isa_driver       dgbdriver = {
 201         dgbprobe, dgbattach, "dgb",0
 202 };
 203
 204 static  d_open_t        dgbopen;
 205 static  d_close_t       dgbclose;
 206 static  d_ioctl_t       dgbioctl;
 207
 208 #define CDEV_MAJOR      58
 209 static struct cdevsw dgb_cdevsw = {
 210         /* name */      "dgb",
 211         /* maj */       CDEV_MAJOR,
 212         /* flags */     D_TTY | D_KQFILTER,
 213         /* port */      NULL,
 214         /* clone */     NULL,
 215
 216         /* open */      dgbopen,
 217         /* close */     dgbclose,
 218         /* read */      ttyread,
 219         /* write */     ttywrite,
 220         /* ioctl */     dgbioctl,
 221         /* poll */      ttypoll,
 222         /* mmap */      nommap,
 223         /* strategy */  nostrategy,
 224         /* dump */      nodump,
 225         /* psize */     nopsize,
 226         /* kqfilter */  ttykqfilter
 227 };
 228
 229 static  speed_t dgbdefaultrate = TTYDEF_SPEED;
 230
 231 static  struct speedtab dgbspeedtab[] = {
 232         { 0,            FEP_B0 }, /* old (sysV-like) Bx codes */
 233         { 50,           FEP_B50 },
 234         { 75,           FEP_B75 },
 235         { 110,          FEP_B110 },
 236         { 134,          FEP_B134 },
 237         { 150,          FEP_B150 },
 238         { 200,          FEP_B200 },
 239         { 300,          FEP_B300 },
 240         { 600,          FEP_B600 },
 241         { 1200,         FEP_B1200 },
 242         { 1800,         FEP_B1800 },
 243         { 2400,         FEP_B2400 },
 244         { 4800,         FEP_B4800 },
 245         { 9600,         FEP_B9600 },
 246         { 19200,        FEP_B19200 },
 247         { 38400,        FEP_B38400 },
 248         { 57600,        (FEP_FASTBAUD|FEP_B50) }, /* B50 & fast baud table */
 249         { 115200, (FEP_FASTBAUD|FEP_B110) }, /* B100 & fast baud table */
 250         { -1,   -1 }
 251 };
 252
 253 static struct dbgflagtbl
 254 {
 255   tcflag_t in_mask;
 256   tcflag_t in_val;
 257   tcflag_t out_val;
 258 } dgb_cflags[] =
 259 {
 260   { PARODD,   PARODD,     FEP_PARODD  },
 261   { PARENB,   PARENB,     FEP_PARENB  },
 262   { CSTOPB,   CSTOPB,     FEP_CSTOPB  },
 263   { CSIZE,    CS5,        FEP_CS6     },
 264   { CSIZE,    CS6,        FEP_CS6     },
 265   { CSIZE,    CS7,        FEP_CS7     },
 266   { CSIZE,    CS8,        FEP_CS8     },
 267   { CLOCAL,   CLOCAL,     FEP_CLOCAL  },
 268   { (tcflag_t)-1 }
 269 }, dgb_iflags[] =
 270 {
 271   { IGNBRK,   IGNBRK,     FEP_IGNBRK  },
 272   { BRKINT,   BRKINT,     FEP_BRKINT  },
 273   { IGNPAR,   IGNPAR,     FEP_IGNPAR  },
 274   { PARMRK,   PARMRK,     FEP_PARMRK  },
 275   { INPCK,    INPCK,      FEP_INPCK   },
 276   { ISTRIP,   ISTRIP,     FEP_ISTRIP  },
 277   { IXON,     IXON,       FEP_IXON    },
 278   { IXOFF,    IXOFF,      FEP_IXOFF   },
 279   { IXANY,    IXANY,      FEP_IXANY   },
 280   { (tcflag_t)-1 }
 281 }, dgb_flow[] =
 282 {
 283   { CRTSCTS,  CRTSCTS,    CTS|RTS     },
 284   { CRTSCTS,  CCTS_OFLOW, CTS         },
 285   { CRTSCTS,  CRTS_IFLOW, RTS         },
 286   { (tcflag_t)-1 }
 287 };
 288
 289 /* xlat bsd termios flags to dgb sys-v style */
 290 static tcflag_t
 291 dgbflags(struct dbgflagtbl *tbl, tcflag_t input)
 292 {
 293   tcflag_t output = 0;
 294   int i;
 295
 296   for (i=0; tbl[i].in_mask != (tcflag_t)-1; i++)
 297   {
 298     if ((input & tbl[i].in_mask) == tbl[i].in_val)
 299       output |= tbl[i].out_val;
 300   }
 301   return output;
 302 }
 303
 304 #ifdef DGB_DEBUG
 305 static int dgbdebug=0;
 306 SYSCTL_INT(_debug, OID_AUTO, dgb_debug, CTLFLAG_RW, &dgbdebug, 0, "");
 307 #endif
 308
 309 static __inline int setwin (struct dgb_softc *sc, unsigned addr);
 310 static __inline int setinitwin (struct dgb_softc *sc, unsigned addr);
 311 static __inline void hidewin (struct dgb_softc *sc);
 312 static __inline void towin (struct dgb_softc *sc, int win);
 313
 314 /*Helg: to allow recursive dgb...() calls */
 315 typedef struct
 316   {                 /* If we were called and don't want to disturb we need: */
 317         int port;               /* write to this port */
 318         u_char data;            /* this data on exit */
 319                           /* or DATA_WINOFF  to close memory window on entry */
 320   } BoardMemWinState; /* so several channels and even boards can coexist */
 321 #define DATA_WINOFF 0
 322 static BoardMemWinState bmws;
 323
 324 /* return current memory window state and close window */
 325 static BoardMemWinState
 326 bmws_get(void)
 327 {
 328         BoardMemWinState bmwsRet=bmws;
 329         if(bmws.data!=DATA_WINOFF)
 330                 outb(bmws.port, bmws.data=DATA_WINOFF);
 331         return bmwsRet;
 332 }
 333
 334 /* restore memory window state */
 335 static void
 336 bmws_set(BoardMemWinState ws)
 337 {
 338         if(ws.data != bmws.data || ws.port!=bmws.port ) {
 339                 if(bmws.data!=DATA_WINOFF)
 340                         outb(bmws.port,DATA_WINOFF);
 341                 if(ws.data!=DATA_WINOFF)
 342                         outb(ws.port, ws.data);
 343                 bmws=ws;
 344         }
 345 }
 346
 347 static __inline int
 348 setwin(sc,addr)
 349         struct dgb_softc *sc;
 350         unsigned int addr;
 351 {
 352         if(sc->type==PCXEVE) {
 353                 outb(bmws.port=sc->port+1, bmws.data=FEPWIN|(addr>>13));
 354                 DPRINT3(DB_WIN,"dgb%d: switched to window 0x%x\n",sc->unit,addr>>13);
 355                 return (addr & 0x1FFF);
 356         } else {
 357                 outb(bmws.port=sc->port,bmws.data=FEPMEM);
 358                 return addr;
 359         }
 360 }
 361
 362 static __inline int
 363 setinitwin(sc,addr)
 364         struct dgb_softc *sc;
 365         unsigned int addr;
 366 {
 367         if(sc->type==PCXEVE) {
 368                 outb(bmws.port=sc->port+1, bmws.data=FEPWIN|(addr>>13));
 369                 DPRINT3(DB_WIN,"dgb%d: switched to window 0x%x\n",sc->unit,addr>>13);
 370                 return (addr & 0x1FFF);
 371         } else {
 372                 outb(bmws.port=sc->port,bmws.data=inb(sc->port)|FEPMEM);
 373                 return addr;
 374         }
 375 }
 376
 377 static __inline void
 378 hidewin(sc)
 379         struct dgb_softc *sc;
 380 {
 381         bmws.data=0;
 382         if(sc->type==PCXEVE)
 383                 outb(bmws.port=sc->port+1, bmws.data);
 384         else
 385                 outb(bmws.port=sc->port, bmws.data);
 386 }
 387
 388 static __inline void
 389 towin(sc,win)
 390         struct dgb_softc *sc;
 391         int win;
 392 {
 393         if(sc->type==PCXEVE) {
 394                 outb(bmws.port=sc->port+1, bmws.data=win);
 395         } else {
 396                 outb(bmws.port=sc->port,bmws.data=FEPMEM);
 397         }
 398 }
 399
 400 static int
 401 dgbprobe(dev)
 402         struct isa_device       *dev;
 403 {
 404         struct dgb_softc *sc= &dgb_softc[dev->id_unit];
 405         int i, v;
 406         u_long win_size;  /* size of vizible memory window */
 407         int unit=dev->id_unit;
 408
 409         sc->unit=dev->id_unit;
 410         sc->port=dev->id_iobase;
 411
 412         if(dev->id_flags & DGBFLAG_ALTPIN)
 413                 sc->altpin=1;
 414         else
 415                 sc->altpin=0;
 416
 417         /* left 24 bits only (ISA address) */
 418         sc->pmem=((intptr_t)(void *)dev->id_maddr & 0xFFFFFF);
 419
 420         DPRINT4(DB_INFO,"dgb%d: port 0x%x mem 0x%lx\n",unit,sc->port,sc->pmem);
 421
 422         outb(sc->port, FEPRST);
 423         sc->status=DISABLED;
 424
 425         for(i=0; i< 1000; i++) {
 426                 DELAY(1);
 427                 if( (inb(sc->port) & FEPMASK) == FEPRST ) {
 428                         sc->status=ENABLED;
 429                         DPRINT3(DB_EXCEPT,"dgb%d: got reset after %d us\n",unit,i);
 430                         break;
 431                 }
 432         }
 433
 434         if(sc->status!=ENABLED) {
 435                 DPRINT2(DB_EXCEPT,"dgb%d: failed to respond\n",dev->id_unit);
 436                 return 0;
 437         }
 438
 439         /* check type of card and get internal memory characteristics */
 440
 441         v=inb(sc->port);
 442
 443         if( v & 0x1 ) {
 444                 switch( v&0x30 ) {
 445                 case 0:
 446                         sc->mem_seg=0xF000;
 447                         win_size=0x10000;
 448                         printf("dgb%d: PC/Xi 64K\n",dev->id_unit);
 449                         break;
 450                 case 0x10:
 451                         sc->mem_seg=0xE000;
 452                         win_size=0x20000;
 453                         printf("dgb%d: PC/Xi 128K\n",dev->id_unit);
 454                         break;
 455                 case 0x20:
 456                         sc->mem_seg=0xC000;
 457                         win_size=0x40000;
 458                         printf("dgb%d: PC/Xi 256K\n",dev->id_unit);
 459                         break;
 460                 default: /* case 0x30: */
 461                         sc->mem_seg=0x8000;
 462                         win_size=0x80000;
 463                         printf("dgb%d: PC/Xi 512K\n",dev->id_unit);
 464                         break;
 465                 }
 466                 sc->type=PCXI;
 467         } else {
 468                 outb(sc->port, 1);
 469                 v=inb(sc->port);
 470
 471                 if( v & 0x1 ) {
 472                         printf("dgb%d: PC/Xm isn't supported\n",dev->id_unit);
 473                         sc->status=DISABLED;
 474                         return 0;
 475                         }
 476
 477                 sc->mem_seg=0xF000;
 478
 479                 if(dev->id_flags==DGBFLAG_NOWIN || ( v&0xC0 )==0) {
 480                         win_size=0x10000;
 481                         printf("dgb%d: PC/Xe 64K\n",dev->id_unit);
 482                         sc->type=PCXE;
 483                 } else {
 484                         win_size=0x2000;
 485                         printf("dgb%d: PC/Xe 64/8K (windowed)\n",dev->id_unit);
 486                         sc->type=PCXEVE;
 487                         if((u_long)sc->pmem & ~0xFFE000) {
 488                                 printf("dgb%d: warning: address 0x%lx truncated to 0x%lx\n",
 489                                         dev->id_unit, sc->pmem,
 490                                         sc->pmem & 0xFFE000);
 491
 492                                 dev->id_maddr= (u_char *)(void *)(intptr_t)( sc->pmem & 0xFFE000 );
 493                         }
 494                 }
 495         }
 496
 497         /* save size of vizible memory segment */
 498         dev->id_msize=win_size;
 499
 500         /* map memory */
 501         dev->id_maddr=sc->vmem=pmap_mapdev(sc->pmem,dev->id_msize);
 502
 503         outb(sc->port, FEPCLR); /* drop RESET */
 504         hidewin(sc); /* Helg: to set initial bmws state */
 505
 506         return 4; /* we need I/O space of 4 ports */
 507 }
 508
 509 static int
 510 dgbattach(dev)
 511         struct isa_device       *dev;
 512 {
 513         int unit=dev->id_unit;
 514         struct dgb_softc *sc= &dgb_softc[dev->id_unit];
 515         int i, t;
 516         u_char volatile *mem;
 517         u_char volatile *ptr;
 518         int addr;
 519         struct dgb_p *port;
 520         volatile struct board_chan *bc;
 521         int shrinkmem;
 522         int nfails;
 523         const volatile ushort *pstat;
 524         int lowwater;
 525         static int nports=0;
 526         char suffix;
 527
 528         if(sc->status!=ENABLED) {
 529                 DPRINT2(DB_EXCEPT,"dbg%d: try to attach a disabled card\n",unit);
 530                 return 0;
 531                 }
 532
 533         mem=sc->vmem;
 534
 535         DPRINT3(DB_INFO,"dgb%d: internal memory segment 0x%x\n",unit,sc->mem_seg);
 536
 537         outb(sc->port, FEPRST); DELAY(1);
 538
 539         for(i=0; (inb(sc->port) & FEPMASK) != FEPRST ; i++) {
 540                 if(i>10000) {
 541                         printf("dgb%d: 1st reset failed\n",dev->id_unit);
 542                         sc->status=DISABLED;
 543                         hidewin(sc);
 544                         return 0;
 545                 }
 546                 DELAY(1);
 547         }
 548
 549         DPRINT3(DB_INFO,"dgb%d: got reset after %d us\n",unit,i);
 550
 551         /* for PCXEVE set up interrupt and base address */
 552
 553         if(sc->type==PCXEVE) {
 554                 t=(((u_long)sc->pmem>>8) & 0xFFE0) | 0x10 /* enable windowing */;
 555                 /* IRQ isn't used */
 556                 outb(sc->port+2,t & 0xFF);
 557                 outb(sc->port+3,t>>8);
 558         } else if(sc->type==PCXE) {
 559                 t=(((u_long)sc->pmem>>8) & 0xFFE0) /* disable windowing */;
 560                 outb(sc->port+2,t & 0xFF);
 561                 outb(sc->port+3,t>>8);
 562         }
 563
 564
 565         if(sc->type==PCXI || sc->type==PCXE) {
 566                 outb(sc->port, FEPRST|FEPMEM); DELAY(1);
 567
 568                 for(i=0; (inb(sc->port) & FEPMASK) != (FEPRST|FEPMEM) ; i++) {
 569                         if(i>10000) {
 570                                 printf("dgb%d: 2nd reset failed\n",dev->id_unit);
 571                                 sc->status=DISABLED;
 572                                 hidewin(sc);
 573                                 return 0;
 574                         }
 575                         DELAY(1);
 576                 }
 577
 578                 DPRINT3(DB_INFO,"dgb%d: got memory after %d us\n",unit,i);
 579         }
 580
 581         mem=sc->vmem;
 582
 583         /* very short memory test */
 584
 585         addr=setinitwin(sc,BOTWIN);
 586         *(u_long volatile *)(mem+addr) = 0xA55A3CC3;
 587         if(*(u_long volatile *)(mem+addr)!=0xA55A3CC3) {
 588                 printf("dgb%d: 1st memory test failed\n",dev->id_unit);
 589                 sc->status=DISABLED;
 590                 hidewin(sc);
 591                 return 0;
 592         }
 593
 594         addr=setinitwin(sc,TOPWIN);
 595         *(u_long volatile *)(mem+addr) = 0x5AA5C33C;
 596         if(*(u_long volatile *)(mem+addr)!=0x5AA5C33C) {
 597                 printf("dgb%d: 2nd memory test failed\n",dev->id_unit);
 598                 sc->status=DISABLED;
 599                 hidewin(sc);
 600                 return 0;
 601         }
 602
 603         addr=setinitwin(sc,BIOSCODE+((0xF000-sc->mem_seg)<<4));
 604         *(u_long volatile *)(mem+addr) = 0x5AA5C33C;
 605         if(*(u_long volatile *)(mem+addr)!=0x5AA5C33C) {
 606                 printf("dgb%d: 3rd (BIOS) memory test failed\n",dev->id_unit);
 607         }
 608
 609         addr=setinitwin(sc,MISCGLOBAL);
 610         for(i=0; i<16; i++) {
 611                 mem[addr+i]=0;
 612         }
 613
 614         if(sc->type==PCXI || sc->type==PCXE) {
 615
 616                 addr=BIOSCODE+((0xF000-sc->mem_seg)<<4);
 617
 618                 DPRINT3(DB_INFO,"dgb%d: BIOS local address=0x%x\n",unit,addr);
 619
 620                 ptr= mem+addr;
 621
 622                 for(i=0; i<pcxx_nbios; i++, ptr++)
 623                         *ptr = pcxx_bios[i];
 624
 625                 ptr= mem+addr;
 626
 627                 nfails=0;
 628                 for(i=0; i<pcxx_nbios; i++, ptr++)
 629                         if( *ptr != pcxx_bios[i] ) {
 630                                 DPRINT5(DB_EXCEPT,"dgb%d: wrong code in BIOS at addr 0x%x : \
 631 0x%x instead of 0x%x\n", unit, ptr-(mem+addr), *ptr, pcxx_bios[i] );
 632
 633                                 if(++nfails>=5) {
 634                                         printf("dgb%d: 4th memory test (BIOS load) fails\n",unit);
 635                                         break;
 636                                         }
 637                                 }
 638
 639                 outb(sc->port,FEPMEM);
 640
 641                 for(i=0; (inb(sc->port) & FEPMASK) != FEPMEM ; i++) {
 642                         if(i>10000) {
 643                                 printf("dgb%d: BIOS start failed\n",dev->id_unit);
 644                                 sc->status=DISABLED;
 645                                 hidewin(sc);
 646                                 return 0;
 647                         }
 648                         DELAY(1);
 649                 }
 650
 651                 DPRINT3(DB_INFO,"dgb%d: reset dropped after %d us\n",unit,i);
 652
 653                 for(i=0; i<200000; i++) {
 654                         if( *((ushort volatile *)(mem+MISCGLOBAL)) == *((ushort *)"GD") )
 655                                 goto load_fep;
 656                         DELAY(1);
 657                 }
 658                 printf("dgb%d: BIOS download failed\n",dev->id_unit);
 659                 DPRINT4(DB_EXCEPT,"dgb%d: code=0x%x must be 0x%x\n",
 660                         dev->id_unit,
 661                         *((ushort volatile *)(mem+MISCGLOBAL)),
 662                         *((ushort *)"GD"));
 663
 664                 sc->status=DISABLED;
 665                 hidewin(sc);
 666                 return 0;
 667         }
 668
 669         if(sc->type==PCXEVE) {
 670                 /* set window 7 */
 671                 outb(sc->port+1,0xFF);
 672
 673                 ptr= mem+(BIOSCODE & 0x1FFF);
 674
 675                 for(i=0; i<pcxx_nbios; i++)
 676                         *ptr++ = pcxx_bios[i];
 677
 678                 ptr= mem+(BIOSCODE & 0x1FFF);
 679
 680                 nfails=0;
 681                 for(i=0; i<pcxx_nbios; i++, ptr++)
 682                         if( *ptr != pcxx_bios[i] ) {
 683                                 DPRINT5(DB_EXCEPT,"dgb%d: wrong code in BIOS at addr 0x%x : \
 684 0x%x instead of 0x%x\n", unit, ptr-(mem+addr), *ptr, pcxx_bios[i] );
 685
 686                                 if(++nfails>=5) {
 687                                         printf("dgb%d: 4th memory test (BIOS load) fails\n",unit);
 688                                         break;
 689                                         }
 690                                 }
 691
 692                 outb(sc->port,FEPCLR);
 693
 694                 setwin(sc,0);
 695
 696                 for(i=0; (inb(sc->port) & FEPMASK) != FEPCLR ; i++) {
 697                         if(i>10000) {
 698                                 printf("dgb%d: BIOS start failed\n",dev->id_unit);
 699                                 sc->status=DISABLED;
 700                                 hidewin(sc);
 701                                 return 0;
 702                         }
 703                         DELAY(1);
 704                 }
 705
 706                 DPRINT3(DB_INFO,"dgb%d: reset dropped after %d us\n",unit,i);
 707
 708                 addr=setwin(sc,MISCGLOBAL);
 709
 710                 for(i=0; i<200000; i++) {
 711                         if(*(ushort volatile *)(mem+addr)== *(ushort *)"GD")
 712                                 goto load_fep;
 713                         DELAY(1);
 714                 }
 715                 printf("dgb%d: BIOS download failed\n",dev->id_unit);
 716                 DPRINT5(DB_EXCEPT,"dgb%d: Error#(0x%x,0x%x) code=0x%x\n",
 717                         dev->id_unit,
 718                         *(ushort volatile *)(mem+0xC12),
 719                         *(ushort volatile *)(mem+0xC14),
 720                         *(ushort volatile *)(mem+MISCGLOBAL));
 721
 722                 sc->status=DISABLED;
 723                 hidewin(sc);
 724                 return 0;
 725         }
 726
 727 load_fep:
 728         DPRINT2(DB_INFO,"dgb%d: BIOS loaded\n",dev->id_unit);
 729
 730         addr=setwin(sc,FEPCODE);
 731
 732         ptr= mem+addr;
 733
 734         for(i=0; i<pcxx_ncook; i++)
 735                 *ptr++ = pcxx_cook[i];
 736
 737         addr=setwin(sc,MBOX);
 738         *(ushort volatile *)(mem+addr+ 0)=2;
 739         *(ushort volatile *)(mem+addr+ 2)=sc->mem_seg+FEPCODESEG;
 740         *(ushort volatile *)(mem+addr+ 4)=0;
 741         *(ushort volatile *)(mem+addr+ 6)=FEPCODESEG;
 742         *(ushort volatile *)(mem+addr+ 8)=0;
 743         *(ushort volatile *)(mem+addr+10)=pcxx_ncook;
 744
 745         outb(sc->port,FEPMEM|FEPINT); /* send interrupt to BIOS */
 746         outb(sc->port,FEPMEM);
 747
 748         for(i=0; *(ushort volatile *)(mem+addr)!=0; i++) {
 749                 if(i>200000) {
 750                         printf("dgb%d: FEP code download failed\n",unit);
 751                         DPRINT3(DB_EXCEPT,"dgb%d: code=0x%x must be 0\n", unit,
 752                                 *(ushort volatile *)(mem+addr));
 753                         sc->status=DISABLED;
 754                         hidewin(sc);
 755                         return 0;
 756                 }
 757         }
 758
 759         DPRINT2(DB_INFO,"dgb%d: FEP code loaded\n",unit);
 760
 761         *(ushort volatile *)(mem+setwin(sc,FEPSTAT))=0;
 762         addr=setwin(sc,MBOX);
 763         *(ushort volatile *)(mem+addr+0)=1;
 764         *(ushort volatile *)(mem+addr+2)=FEPCODESEG;
 765         *(ushort volatile *)(mem+addr+4)=0x4;
 766
 767         outb(sc->port,FEPINT); /* send interrupt to BIOS */
 768         outb(sc->port,FEPCLR);
 769
 770         addr=setwin(sc,FEPSTAT);
 771         for(i=0; *(ushort volatile *)(mem+addr)!= *(ushort *)"OS"; i++) {
 772                 if(i>200000) {
 773                         printf("dgb%d: FEP/OS start failed\n",dev->id_unit);
 774                         sc->status=DISABLED;
 775                         hidewin(sc);
 776                         return 0;
 777                 }
 778         }
 779
 780         DPRINT2(DB_INFO,"dgb%d: FEP/OS started\n",dev->id_unit);
 781
 782         sc->numports= *(ushort volatile *)(mem+setwin(sc,NPORT));
 783
 784         printf("dgb%d: %d ports\n",unit,sc->numports);
 785
 786         if(sc->numports > MAX_DGB_PORTS) {
 787                 printf("dgb%d: too many ports\n",unit);
 788                 sc->status=DISABLED;
 789                 hidewin(sc);
 790                 return 0;
 791         }
 792
 793         if(nports+sc->numports>NDGBPORTS) {
 794                 printf("dgb%d: only %d ports are usable\n", unit, NDGBPORTS-nports);
 795                 sc->numports=NDGBPORTS-nports;
 796         }
 797
 798         /* allocate port and tty structures */
 799         sc->ports=&dgb_ports[nports];
 800         sc->ttys=&dgb_tty[nports];
 801         nports+=sc->numports;
 802
 803         addr=setwin(sc,PORTBASE);
 804         pstat=(const ushort volatile *)(mem+addr);
 805
 806         for(i=0; i<sc->numports && pstat[i]; i++)
 807                 if(pstat[i])
 808                         sc->ports[i].status=ENABLED;
 809                 else {
 810                         sc->ports[i].status=DISABLED;
 811                         printf("dgb%d: port%d is broken\n", unit, i);
 812                 }
 813
 814         /* We should now init per-port structures */
 815         bc=(volatile struct board_chan *)(mem + CHANSTRUCT);
 816         sc->mailbox=(volatile struct global_data *)(mem + FEP_GLOBAL);
 817
 818         if(sc->numports<3)
 819                 shrinkmem=1;
 820         else
 821                 shrinkmem=0;
 822
 823         for(i=0; i<sc->numports; i++, bc++) {
 824                 port= &sc->ports[i];
 825
 826                 port->tty=&sc->ttys[i];
 827                 port->unit=unit;
 828
 829                 port->brdchan=bc;
 830
 831                 if(sc->altpin) {
 832                         port->dsr=CD;
 833                         port->dcd=DSR;
 834                 } else {
 835                         port->dcd=CD;
 836                         port->dsr=DSR;
 837                 }
 838
 839                 port->pnum=i;
 840
 841                 if(shrinkmem) {
 842                         DPRINT2(DB_INFO,"dgb%d: shrinking memory\n",unit);
 843                         fepcmd(port, SETBUFFER, 32, 0, 0, 0);
 844                         shrinkmem=0;
 845                         }
 846
 847                 if(sc->type!=PCXEVE) {
 848                         port->txptr=mem+((bc->tseg-sc->mem_seg)<<4);
 849                         port->rxptr=mem+((bc->rseg-sc->mem_seg)<<4);
 850                         port->txwin=port->rxwin=0;
 851                 } else {
 852                         port->txptr=mem+( ((bc->tseg-sc->mem_seg)<<4) & 0x1FFF );
 853                         port->rxptr=mem+( ((bc->rseg-sc->mem_seg)<<4) & 0x1FFF );
 854                         port->txwin=FEPWIN | ((bc->tseg-sc->mem_seg)>>9);
 855                         port->rxwin=FEPWIN | ((bc->rseg-sc->mem_seg)>>9);
 856                 }
 857
 858                 port->txbufhead=0;
 859                 port->rxbufhead=0;
 860                 port->txbufsize=bc->tmax+1;
 861                 port->rxbufsize=bc->rmax+1;
 862
 863                 lowwater= (port->txbufsize>=2000) ? 1024 : (port->txbufsize/2);
 864                 setwin(sc,0);
 865                 fepcmd(port, STXLWATER, lowwater, 0, 10, 0);
 866                 fepcmd(port, SRXLWATER, port->rxbufsize/4, 0, 10, 0);
 867                 fepcmd(port, SRXHWATER, 3*port->rxbufsize/4, 0, 10, 0);
 868
 869                 bc->edelay=100;
 870                 bc->idata=1;
 871
 872                 port->startc=bc->startc;
 873                 port->startca=bc->startca;
 874                 port->stopc=bc->stopc;
 875                 port->stopca=bc->stopca;
 876
 877                 /*port->close_delay=50;*/
 878                 port->close_delay=3 * hz;
 879                 port->do_timestamp=0;
 880                 port->do_dcd_timestamp=0;
 881
 882                 /*
 883                  * We don't use all the flags from <sys/ttydefaults.h> since they
 884                  * are only relevant for logins.  It's important to have echo off
 885                  * initially so that the line doesn't start blathering before the
 886                  * echo flag can be turned off.
 887                  */
 888                 port->it_in.c_iflag = TTYDEF_IFLAG;
 889                 port->it_in.c_oflag = TTYDEF_OFLAG;
 890                 port->it_in.c_cflag = TTYDEF_CFLAG;
 891                 port->it_in.c_lflag = TTYDEF_LFLAG;
 892                 termioschars(&port->it_in);
 893                 port->it_in.c_ispeed = port->it_in.c_ospeed = dgbdefaultrate;
 894                 port->it_out = port->it_in;
 895                 /* MAX_DGB_PORTS is 32 => [0-9a-v] */
 896                 suffix = i < 10 ? '0' + i : 'a' + i - 10;
 897                 cdevsw_add(&dgb_cdevsw, 0xffff0000, unit << 16);
 898                 make_dev(&dgb_cdevsw, (unit<<16)+i,
 899                     UID_ROOT, GID_WHEEL, 0600, "ttyD%d%c", unit, suffix);
 900
 901                 make_dev(&dgb_cdevsw, (unit<<16)+i+32,
 902                     UID_ROOT, GID_WHEEL, 0600, "ttyiD%d%c", unit, suffix);
 903
 904                 make_dev(&dgb_cdevsw, (unit<<16)+i+64,
 905                     UID_ROOT, GID_WHEEL, 0600, "ttylD%d%c", unit, suffix);
 906
 907                 make_dev(&dgb_cdevsw, (unit<<16)+i+128,
 908                     UID_UUCP, GID_DIALER, 0660, "cuaD%d%c", unit, suffix);
 909
 910                 make_dev(&dgb_cdevsw, (unit<<16)+i+160,
 911                     UID_UUCP, GID_DIALER, 0660, "cuaiD%d%c", unit, suffix);
 912
 913                 make_dev(&dgb_cdevsw, (unit<<16)+i+192,
 914                     UID_UUCP, GID_DIALER, 0660, "cualD%d%c", unit, suffix);
 915         }
 916
 917         hidewin(sc);
 918
 919         /* register the polling function */
 920         timeout(dgbpoll, (void *)unit, hz/POLLSPERSEC);
 921
 922         return 1;
 923 }
 924
 925 /* ARGSUSED */
 926 static  int
 927 dgbopen(dev_t dev, int flag, int mode, struct thread *td)
 928 {
 929         struct dgb_softc *sc;
 930         struct tty *tp;
 931         int unit;
 932         int mynor;
 933         int pnum;
 934         struct dgb_p *port;
 935         int s,cs;
 936         int error;
 937         volatile struct board_chan *bc;
 938
 939         error=0;
 940
 941         mynor=minor(dev);
 942         unit=MINOR_TO_UNIT(mynor);
 943         pnum=MINOR_TO_PORT(mynor);
 944
 945         if(unit >= NDGB) {
 946                 DPRINT2(DB_EXCEPT,"dgb%d: try to open a nonexisting card\n",unit);
 947                 return ENXIO;
 948         }
 949
 950         sc=&dgb_softc[unit];
 951
 952         if(sc->status!=ENABLED) {
 953                 DPRINT2(DB_EXCEPT,"dgb%d: try to open a disabled card\n",unit);
 954                 return ENXIO;
 955         }
 956
 957         if(pnum>=sc->numports) {
 958                 DPRINT3(DB_EXCEPT,"dgb%d: try to open non-existing port %d\n",unit,pnum);
 959                 return ENXIO;
 960         }
 961
 962         if(mynor & CONTROL_MASK)
 963                 return 0;
 964
 965         tp=&sc->ttys[pnum];
 966         dev->si_tty = tp;
 967         port=&sc->ports[pnum];
 968         bc=port->brdchan;
 969
 970 open_top:
 971
 972         s=spltty();
 973
 974         while(port->closing) {
 975                 error=tsleep(&port->closing, PCATCH, "dgocl", 0);
 976
 977                 if(error) {
 978                         DPRINT4(DB_OPEN,"dgb%d: port%d: tsleep(dgocl) error=%d\n",unit,pnum,error);
 979                         goto out;
 980                 }
 981         }
 982
 983         if (tp->t_state & TS_ISOPEN) {
 984                 /*
 985                  * The device is open, so everything has been initialized.
 986                  * Handle conflicts.
 987                  */
 988                 if (mynor & CALLOUT_MASK) {
 989                         if (!port->active_out) {
 990                                 error = EBUSY;
 991                                 DPRINT4(DB_OPEN,"dgb%d: port%d: BUSY error=%d\n",unit,pnum,error);
 992                                 goto out;
 993                         }
 994                 } else {
 995                         if (port->active_out) {
 996                                 if (flag & O_NONBLOCK) {
 997                                         error = EBUSY;
 998                                         DPRINT4(DB_OPEN,"dgb%d: port%d: BUSY error=%d\n",unit,pnum,error);
 999                                         goto out;
1000                                 }
1001                                 error = tsleep(&port->active_out,
1002                                                PCATCH, "dgbi", 0);
1003                                 if (error != 0) {
1004                                         DPRINT4(DB_OPEN,"dgb%d: port%d: tsleep(dgbi) error=%d\n",
1005                                                 unit,pnum,error);
1006                                         goto out;
1007                                 }
1008                                 splx(s);
1009                                 goto open_top;
1010                         }
1011                 }
1012                 if (tp->t_state & TS_XCLUDE && suser(td)) {
1013                         error = EBUSY;
1014                         goto out;
1015                 }
1016         } else {
1017                 /*
1018                  * The device isn't open, so there are no conflicts.
1019                  * Initialize it.  Initialization is done twice in many
1020                  * cases: to preempt sleeping callin opens if we are
1021                  * callout, and to complete a callin open after DCD rises.
1022                  */
1023                 tp->t_oproc=dgbstart;
1024                 tp->t_param=dgbparam;
1025                 tp->t_stop=dgbstop;
1026                 tp->t_dev=dev;
1027                 tp->t_termios= (mynor & CALLOUT_MASK) ?
1028                                                         port->it_out :
1029                                                         port->it_in;
1030
1031                 cs=splclock();
1032                 setwin(sc,0);
1033                 port->imodem=bc->mstat;
1034                 bc->rout=bc->rin; /* clear input queue */
1035                 bc->idata=1;
1036 #ifdef PRINT_BUFSIZE
1037                 printf("dgb buffers tx=%x:%x rx=%x:%x\n",bc->tseg,bc->tmax,bc->rseg,bc->rmax);
1038 #endif
1039
1040                 hidewin(sc);
1041                 splx(cs);
1042
1043                 port->wopeners++;
1044                 error=dgbparam(tp, &tp->t_termios);
1045                 port->wopeners--;
1046
1047                 if(error!=0) {
1048                         DPRINT4(DB_OPEN,"dgb%d: port%d: dgbparam error=%d\n",unit,pnum,error);
1049                         goto out;
1050                 }
1051
1052                 /* handle fake DCD for callout devices */
1053                 /* and initial DCD */
1054
1055                 if( (port->imodem & port->dcd) || mynor & CALLOUT_MASK )
1056                         linesw[tp->t_line].l_modem(tp,1);
1057
1058         }
1059
1060         /*
1061          * Wait for DCD if necessary.
1062          */
1063         if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK)
1064             && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) {
1065                 ++port->wopeners;
1066                 error = tsleep(TSA_CARR_ON(tp), PCATCH, "dgdcd", 0);
1067                 --port->wopeners;
1068                 if (error != 0) {
1069                         DPRINT4(DB_OPEN,"dgb%d: port%d: tsleep(dgdcd) error=%d\n",unit,pnum,error);
1070                         goto out;
1071                 }
1072                 splx(s);
1073                 goto open_top;
1074         }
1075         error = linesw[tp->t_line].l_open(dev, tp);
1076         disc_optim(tp,&tp->t_termios);
1077         DPRINT4(DB_OPEN,"dgb%d: port%d: l_open error=%d\n",unit,pnum,error);
1078
1079         if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK)
1080                 port->active_out = TRUE;
1081
1082         port->used=1;
1083
1084         /* If any port is open (i.e. the open() call is completed for it)
1085          * the device is busy
1086          */
1087
1088 out:
1089         disc_optim(tp,&tp->t_termios);
1090         splx(s);
1091
1092         if( !(tp->t_state & TS_ISOPEN) && port->wopeners==0 )
1093                 dgbhardclose(port);
1094
1095         DPRINT4(DB_OPEN,"dgb%d: port%d: open() returns %d\n",unit,pnum,error);
1096
1097         return error;
1098 }
1099
1100 /*ARGSUSED*/
1101 static  int
1102 dgbclose(dev_t dev, int flag, int mode, struct thread *td)
1103 {
1104         struct tty *tp;
1105         int unit, pnum;
1106         struct dgb_softc *sc;
1107         struct dgb_p *port;
1108         int mynor;
1109         int s;
1110         int i;
1111
1112         mynor=minor(dev);
1113         if(mynor & CONTROL_MASK)
1114                 return 0;
1115         unit=MINOR_TO_UNIT(mynor);
1116         pnum=MINOR_TO_PORT(mynor);
1117
1118         sc=&dgb_softc[unit];
1119         tp=&sc->ttys[pnum];
1120         port=sc->ports+pnum;
1121
1122         DPRINT3(DB_CLOSE,"dgb%d: port%d: closing\n",unit,pnum);
1123
1124         DPRINT3(DB_CLOSE,"dgb%d: port%d: draining port\n",unit,pnum);
1125         dgb_drain_or_flush(port);
1126
1127         s=spltty();
1128
1129         port->closing=1;
1130         DPRINT3(DB_CLOSE,"dgb%d: port%d: closing line disc\n",unit,pnum);
1131         linesw[tp->t_line].l_close(tp,flag);
1132         disc_optim(tp,&tp->t_termios);
1133
1134         DPRINT3(DB_CLOSE,"dgb%d: port%d: hard closing\n",unit,pnum);
1135         dgbhardclose(port);
1136         DPRINT3(DB_CLOSE,"dgb%d: port%d: closing tty\n",unit,pnum);
1137         ttyclose(tp);
1138         port->closing=0;
1139         wakeup(&port->closing);
1140         port->used=0;
1141
1142         /* mark the card idle when all ports are closed */
1143
1144         for(i=0; i<sc->numports; i++)
1145                 if(sc->ports[i].used)
1146                         break;
1147
1148         splx(s);
1149
1150         DPRINT3(DB_CLOSE,"dgb%d: port%d: closed\n",unit,pnum);
1151
1152         wakeup(TSA_CARR_ON(tp));
1153         wakeup(&port->active_out);
1154         port->active_out=0;
1155
1156         DPRINT3(DB_CLOSE,"dgb%d: port%d: close exit\n",unit,pnum);
1157
1158         return 0;
1159 }
1160
1161 static void
1162 dgbhardclose(port)
1163         struct dgb_p *port;
1164 {
1165         struct dgb_softc *sc=&dgb_softc[port->unit];
1166         volatile struct board_chan *bc=port->brdchan;
1167         int cs;
1168
1169         cs=splclock();
1170         port->do_timestamp = 0;
1171         setwin(sc,0);
1172
1173         bc->idata=0; bc->iempty=0; bc->ilow=0;
1174         if(port->tty->t_cflag & HUPCL) {
1175                 port->omodem &= ~(RTS|DTR);
1176                 fepcmd(port, SETMODEM, 0, DTR|RTS, 0, 1);
1177         }
1178
1179         hidewin(sc);
1180         splx(cs);
1181
1182         timeout(dgb_pause, &port->brdchan, hz/2);
1183         tsleep(&port->brdchan, PCATCH, "dgclo", 0);
1184 }
1185
1186 static void
1187 dgb_pause(chan)
1188         void *chan;
1189 {
1190         wakeup((caddr_t)chan);
1191 }
1192
1193 static void
1194 dgbpoll(unit_c)
1195         void *unit_c;
1196 {
1197         int unit=(int)unit_c;
1198         int pnum;
1199         struct dgb_p *port;
1200         struct dgb_softc *sc=&dgb_softc[unit];
1201         int head, tail;
1202         u_char *eventbuf;
1203         int event, mstat, lstat;
1204         volatile struct board_chan *bc;
1205         struct tty *tp;
1206         int rhead, rtail;
1207         int whead, wtail;
1208         int size;
1209         u_char *ptr;
1210         int ocount;
1211         int ibuf_full,obuf_full;
1212
1213         BoardMemWinState ws=bmws_get();
1214
1215         if(sc->status==DISABLED) {
1216                 printf("dgb%d: polling of disabled board stopped\n",unit);
1217                 return;
1218         }
1219
1220         setwin(sc,0);
1221
1222         head=sc->mailbox->ein;
1223         tail=sc->mailbox->eout;
1224
1225         while(head!=tail) {
1226                 if(head >= FEP_IMAX-FEP_ISTART
1227                 || tail >= FEP_IMAX-FEP_ISTART
1228                 || (head|tail) & 03 ) {
1229                         printf("dgb%d: event queue's head or tail is wrong! hd=%d,tl=%d\n", unit,head,tail);
1230                         break;
1231                 }
1232
1233                 eventbuf=sc->vmem+tail+FEP_ISTART;
1234                 pnum=eventbuf[0];
1235                 event=eventbuf[1];
1236                 mstat=eventbuf[2];
1237                 lstat=eventbuf[3];
1238
1239                 port=&sc->ports[pnum];
1240                 bc=port->brdchan;
1241                 tp=&sc->ttys[pnum];
1242
1243                 if(pnum>=sc->numports || port->status==DISABLED) {
1244                         printf("dgb%d: port%d: got event on nonexisting port\n",unit,pnum);
1245                 } else if(port->used || port->wopeners>0 ) {
1246
1247                         int wrapmask=port->rxbufsize-1;
1248
1249                         if( !(event & ALL_IND) )
1250                                 printf("dgb%d: port%d: ? event 0x%x mstat 0x%x lstat 0x%x\n",
1251                                         unit, pnum, event, mstat, lstat);
1252
1253                         if(event & DATA_IND) {
1254                                 DPRINT3(DB_DATA,"dgb%d: port%d: DATA_IND\n",unit,pnum);
1255
1256                                 rhead=bc->rin & wrapmask;
1257                                 rtail=bc->rout & wrapmask;
1258
1259                                 if( !(tp->t_cflag & CREAD) || !port->used ) {
1260                                         bc->rout=rhead;
1261                                         goto end_of_data;
1262                                 }
1263
1264                                 if(bc->orun) {
1265                                         printf("dgb%d: port%d: overrun\n", unit, pnum);
1266                                         bc->orun=0;
1267                                 }
1268
1269                                 if(!(tp->t_state & TS_ISOPEN))
1270                                         goto end_of_data;
1271
1272                                 for(ibuf_full=FALSE;rhead!=rtail && !ibuf_full;) {
1273                                         DPRINT5(DB_RXDATA,"dgb%d: port%d: p rx head=%d tail=%d\n",
1274                                                 unit,pnum,rhead,rtail);
1275
1276                                         if(rhead>rtail)
1277                                                 size=rhead-rtail;
1278                                         else
1279                                                 size=port->rxbufsize-rtail;
1280
1281                                         ptr=__DEVOLATILE(u_char *, port->rxptr+rtail);
1282
1283 /* Helg: */
1284                                         if( tp->t_rawq.c_cc + size > DGB_IBUFSIZE ) {
1285                                                 size=DGB_IBUFSIZE-tp->t_rawq.c_cc;
1286                                                 DPRINT1(DB_RXDATA,"*");
1287                                                 ibuf_full=TRUE;
1288                                         }
1289
1290                                         if(size) {
1291                                                 if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
1292                                                         DPRINT1(DB_RXDATA,"!");
1293                                                         towin(sc,port->rxwin);
1294                                                         tk_nin += size;
1295                                                         tk_rawcc += size;
1296                                                         tp->t_rawcc += size;
1297                                                         b_to_q(ptr,size,&tp->t_rawq);
1298                                                         setwin(sc,0);
1299                                                 } else {
1300                                                         int i=size;
1301                                                         unsigned char chr;
1302                                                         do {
1303                                                                 towin(sc,port->rxwin);
1304                                                                 chr= *ptr++;
1305                                                                 hidewin(sc);
1306                                                                (*linesw[tp->t_line].l_rint)(chr, tp);
1307                                                         } while (--i > 0 );
1308                                                         setwin(sc,0);
1309                                                 }
1310                                         }
1311                                         rtail= (rtail + size) & wrapmask;
1312                                         bc->rout=rtail;
1313                                         rhead=bc->rin & wrapmask;
1314                                         hidewin(sc);
1315                                         ttwakeup(tp);
1316                                         setwin(sc,0);
1317                                 }
1318                         end_of_data: ;
1319                         }
1320
1321                         if(event & MODEMCHG_IND) {
1322                                 DPRINT3(DB_MODEM,"dgb%d: port%d: MODEMCHG_IND\n",unit,pnum);
1323                                 port->imodem=mstat;
1324                                 if(mstat & port->dcd) {
1325                                         hidewin(sc);
1326                                         linesw[tp->t_line].l_modem(tp,1);
1327                                         setwin(sc,0);
1328                                         wakeup(TSA_CARR_ON(tp));
1329                                 } else {
1330                                         hidewin(sc);
1331                                         linesw[tp->t_line].l_modem(tp,0);
1332                                         setwin(sc,0);
1333                                         if( port->draining) {
1334                                                 port->draining=0;
1335                                                 wakeup(&port->draining);
1336                                         }
1337                                 }
1338                         }
1339
1340                         if(event & BREAK_IND) {
1341                                 if((tp->t_state & TS_ISOPEN) && (tp->t_iflag & IGNBRK)) {
1342                                         DPRINT3(DB_BREAK,"dgb%d: port%d: BREAK_IND\n",unit,pnum);
1343                                         hidewin(sc);
1344                                         linesw[tp->t_line].l_rint(TTY_BI, tp);
1345                                         setwin(sc,0);
1346                                 }
1347                         }
1348
1349 /* Helg: with output flow control */
1350
1351                         if(event & (LOWTX_IND | EMPTYTX_IND) ) {
1352                                 DPRINT3(DB_TXDATA,"dgb%d: port%d: LOWTX_IND or EMPTYTX_IND\n",unit,pnum);
1353
1354                                 if( (event & EMPTYTX_IND ) && tp->t_outq.c_cc==0
1355                                 && port->draining) {
1356                                         port->draining=0;
1357                                         wakeup(&port->draining);
1358                                         bc->ilow=0; bc->iempty=0;
1359                                 } else {
1360
1361                                         int wrapmask=port->txbufsize-1;
1362
1363                                         for(obuf_full=FALSE; tp->t_outq.c_cc!=0 && !obuf_full; ) {
1364                                                 int s;
1365                                                 /* add "last-minute" data to write buffer */
1366                                                 if(!(tp->t_state & TS_BUSY)) {
1367                                                         hidewin(sc);
1368 #ifndef TS_ASLEEP       /* post 2.0.5 FreeBSD */
1369                                                         ttwwakeup(tp);
1370 #else
1371                                                         if(tp->t_outq.c_cc <= tp->t_lowat) {
1372                                                                 if(tp->t_state & TS_ASLEEP) {
1373                                                                         tp->t_state &= ~TS_ASLEEP;
1374                                                                         wakeup(TSA_OLOWAT(tp));
1375                                                                 }
1376                                                                 /* selwakeup(&tp->t_wsel); */
1377                                                         }
1378 #endif
1379                                                         setwin(sc,0);
1380                                                 }
1381                                                 s=spltty();
1382
1383                                         whead=bc->tin & wrapmask;
1384                                         wtail=bc->tout & wrapmask;
1385
1386                                         if(whead<wtail)
1387                                                 size=wtail-whead-1;
1388                                         else {
1389                                                 size=port->txbufsize-whead;
1390                                                 if(wtail==0)
1391                                                         size--;
1392                                         }
1393
1394                                         if(size==0) {
1395                                                 DPRINT5(DB_WR,"dgb: head=%d tail=%d size=%d full=%d\n",
1396                                                         whead,wtail,size,obuf_full);
1397                                                 bc->iempty=1; bc->ilow=1;
1398                                                 obuf_full=TRUE;
1399                                                 splx(s);
1400                                                 break;
1401                                         }
1402
1403                                         towin(sc,port->txwin);
1404
1405                                         ocount=q_to_b(&tp->t_outq, __DEVOLATILE(u_char *, port->txptr+whead), size);
1406                                         whead+=ocount;
1407
1408                                         setwin(sc,0);
1409                                         bc->tin=whead;
1410                                         bc->tin=whead & wrapmask;
1411                                         splx(s);
1412                                 }
1413
1414                                 if(obuf_full) {
1415                                         DPRINT1(DB_WR," +BUSY\n");
1416                                         tp->t_state|=TS_BUSY;
1417                                 } else {
1418                                         DPRINT1(DB_WR," -BUSY\n");
1419                                         hidewin(sc);
1420 #ifndef TS_ASLEEP       /* post 2.0.5 FreeBSD */
1421                                         /* should clear TS_BUSY before ttwwakeup */
1422                                         if(tp->t_state & TS_BUSY)       {
1423                                                 tp->t_state &= ~TS_BUSY;
1424                                                 linesw[tp->t_line].l_start(tp);
1425                                                 ttwwakeup(tp);
1426                                         }
1427 #else
1428                                 if(tp->t_state & TS_ASLEEP) {
1429                                         tp->t_state &= ~TS_ASLEEP;
1430                                         wakeup(TSA_OLOWAT(tp));
1431                                 }
1432                                 tp->t_state &= ~TS_BUSY;
1433 #endif
1434                                         setwin(sc,0);
1435                                         }
1436                                 }
1437                         }
1438                         bc->idata=1;   /* require event on incoming data */
1439
1440                 } else {
1441                         bc=port->brdchan;
1442                         DPRINT4(DB_EXCEPT,"dgb%d: port%d: got event 0x%x on closed port\n",
1443                                 unit,pnum,event);
1444                         bc->rout=bc->rin;
1445                         bc->idata=bc->iempty=bc->ilow=0;
1446                 }
1447
1448                 tail= (tail+4) & (FEP_IMAX-FEP_ISTART-4);
1449         }
1450
1451         sc->mailbox->eout=tail;
1452         bmws_set(ws);
1453
1454         timeout(dgbpoll, unit_c, hz/POLLSPERSEC);
1455 }
1456
1457 static  int
1458 dgbioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1459 {
1460         struct dgb_softc *sc;
1461         int unit, pnum;
1462         struct dgb_p *port;
1463         int mynor;
1464         struct tty *tp;
1465         volatile struct board_chan *bc;
1466         int error;
1467         int s,cs;
1468         int tiocm_xxx;
1469
1470 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
1471         u_long          oldcmd;
1472         struct termios  term;
1473 #endif
1474
1475         BoardMemWinState ws=bmws_get();
1476
1477         mynor=minor(dev);
1478         unit=MINOR_TO_UNIT(mynor);
1479         pnum=MINOR_TO_PORT(mynor);
1480
1481         sc=&dgb_softc[unit];
1482         port=&sc->ports[pnum];
1483         tp=&sc->ttys[pnum];
1484         bc=port->brdchan;
1485
1486         if (mynor & CONTROL_MASK) {
1487                 struct termios *ct;
1488
1489                 switch (mynor & CONTROL_MASK) {
1490                 case CONTROL_INIT_STATE:
1491                         ct = mynor & CALLOUT_MASK ? &port->it_out : &port->it_in;
1492                         break;
1493                 case CONTROL_LOCK_STATE:
1494                         ct = mynor & CALLOUT_MASK ? &port->lt_out : &port->lt_in;
1495                         break;
1496                 default:
1497                         return (ENODEV);        /* /dev/nodev */
1498                 }
1499                 switch (cmd) {
1500                 case TIOCSETA:
1501                         error = suser(td);
1502                         if (error != 0)
1503                                 return (error);
1504                         *ct = *(struct termios *)data;
1505                         return (0);
1506                 case TIOCGETA:
1507                         *(struct termios *)data = *ct;
1508                         return (0);
1509                 case TIOCGETD:
1510                         *(int *)data = TTYDISC;
1511                         return (0);
1512                 case TIOCGWINSZ:
1513                         bzero(data, sizeof(struct winsize));
1514                         return (0);
1515                 default:
1516                         return (ENOTTY);
1517                 }
1518         }
1519
1520 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
1521         term = tp->t_termios;
1522         if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
1523           DPRINT6(DB_PARAM,"dgb%d: port%d: dgbioctl-ISNOW c=0x%x i=0x%x l=0x%x\n",unit,pnum,term.c_cflag,term.c_iflag,term.c_lflag);
1524         }
1525         oldcmd = cmd;
1526         error = ttsetcompat(tp, &cmd, data, &term);
1527         if (error != 0)
1528                 return (error);
1529         if (cmd != oldcmd)
1530                 data = (caddr_t)&term;
1531 #endif
1532
1533         if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
1534                 int     cc;
1535                 struct termios *dt = (struct termios *)data;
1536                 struct termios *lt = mynor & CALLOUT_MASK
1537                                      ? &port->lt_out : &port->lt_in;
1538
1539                 DPRINT6(DB_PARAM,"dgb%d: port%d: dgbioctl-TOSET c=0x%x i=0x%x l=0x%x\n",unit,pnum,dt->c_cflag,dt->c_iflag,dt->c_lflag);
1540                 dt->c_iflag = (tp->t_iflag & lt->c_iflag)
1541                               | (dt->c_iflag & ~lt->c_iflag);
1542                 dt->c_oflag = (tp->t_oflag & lt->c_oflag)
1543                               | (dt->c_oflag & ~lt->c_oflag);
1544                 dt->c_cflag = (tp->t_cflag & lt->c_cflag)
1545                               | (dt->c_cflag & ~lt->c_cflag);
1546                 dt->c_lflag = (tp->t_lflag & lt->c_lflag)
1547                               | (dt->c_lflag & ~lt->c_lflag);
1548                 for (cc = 0; cc < NCCS; ++cc)
1549                         if (lt->c_cc[cc] != 0)
1550                                 dt->c_cc[cc] = tp->t_cc[cc];
1551                 if (lt->c_ispeed != 0)
1552                         dt->c_ispeed = tp->t_ispeed;
1553                 if (lt->c_ospeed != 0)
1554                         dt->c_ospeed = tp->t_ospeed;
1555         }
1556
1557         if(cmd==TIOCSTOP) {
1558                 cs=splclock();
1559                 setwin(sc,0);
1560                 fepcmd(port, PAUSETX, 0, 0, 0, 0);
1561                 bmws_set(ws);
1562                 splx(cs);
1563                 return 0;
1564         } else if(cmd==TIOCSTART) {
1565                 cs=splclock();
1566                 setwin(sc,0);
1567                 fepcmd(port, RESUMETX, 0, 0, 0, 0);
1568                 bmws_set(ws);
1569                 splx(cs);
1570                 return 0;
1571         }
1572
1573         if(cmd==TIOCSETAW || cmd==TIOCSETAF)
1574                 port->mustdrain=1;
1575
1576         error = linesw[tp->t_line].l_ioctl(tp, cmd, data, flag, td);
1577         if (error != ENOIOCTL)
1578                 return error;
1579         s = spltty();
1580         error = ttioctl(tp, cmd, data, flag);
1581         disc_optim(tp,&tp->t_termios);
1582         port->mustdrain=0;
1583         if (error != ENOIOCTL) {
1584                 splx(s);
1585                 if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
1586                         DPRINT6(DB_PARAM,"dgb%d: port%d: dgbioctl-RES c=0x%x i=0x%x l=0x%x\n",unit,pnum,tp->t_cflag,tp->t_iflag,tp->t_lflag);
1587                 }
1588                 return error;
1589         }
1590
1591         switch (cmd) {
1592         case TIOCSBRK:
1593 /* Helg: commented */
1594 /*              error=dgbdrain(port);*/
1595
1596                 if(error!=0) {
1597                         splx(s);
1598                         return error;
1599                 }
1600
1601                 cs=splclock();
1602                 setwin(sc,0);
1603
1604                 /* now it sends 250 millisecond break because I don't know */
1605                 /* how to send an infinite break */
1606
1607                 fepcmd(port, SENDBREAK, 250, 0, 10, 0);
1608                 hidewin(sc);
1609                 splx(cs);
1610                 break;
1611         case TIOCCBRK:
1612                 /* now it's empty */
1613                 break;
1614         case TIOCSDTR:
1615                 DPRINT3(DB_MODEM,"dgb%d: port%d: set DTR\n",unit,pnum);
1616                 port->omodem |= DTR;
1617                 cs=splclock();
1618                 setwin(sc,0);
1619                 fepcmd(port, SETMODEM, port->omodem, RTS, 0, 1);
1620
1621                 if( !(bc->mstat & DTR) ) {
1622                         DPRINT3(DB_MODEM,"dgb%d: port%d: DTR is off\n",unit,pnum);
1623                 }
1624
1625                 hidewin(sc);
1626                 splx(cs);
1627                 break;
1628         case TIOCCDTR:
1629                 DPRINT3(DB_MODEM,"dgb%d: port%d: reset DTR\n",unit,pnum);
1630                 port->omodem &= ~DTR;
1631                 cs=splclock();
1632                 setwin(sc,0);
1633                 fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
1634
1635                 if( bc->mstat & DTR ) {
1636                         DPRINT3(DB_MODEM,"dgb%d: port%d: DTR is on\n",unit,pnum);
1637                 }
1638
1639                 hidewin(sc);
1640                 splx(cs);
1641                 break;
1642         case TIOCMSET:
1643                 if(*(int *)data & TIOCM_DTR)
1644                         port->omodem |=DTR;
1645                 else
1646                         port->omodem &=~DTR;
1647
1648                 if(*(int *)data & TIOCM_RTS)
1649                         port->omodem |=RTS;
1650                 else
1651                         port->omodem &=~RTS;
1652
1653                 cs=splclock();
1654                 setwin(sc,0);
1655                 fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
1656                 hidewin(sc);
1657                 splx(cs);
1658                 break;
1659         case TIOCMBIS:
1660                 if(*(int *)data & TIOCM_DTR)
1661                         port->omodem |=DTR;
1662
1663                 if(*(int *)data & TIOCM_RTS)
1664                         port->omodem |=RTS;
1665
1666                 cs=splclock();
1667                 setwin(sc,0);
1668                 fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
1669                 hidewin(sc);
1670                 splx(cs);
1671                 break;
1672         case TIOCMBIC:
1673                 if(*(int *)data & TIOCM_DTR)
1674                         port->omodem &=~DTR;
1675
1676                 if(*(int *)data & TIOCM_RTS)
1677                         port->omodem &=~RTS;
1678
1679                 cs=splclock();
1680                 setwin(sc,0);
1681                 fepcmd(port, SETMODEM, port->omodem, RTS|DTR, 0, 1);
1682                 hidewin(sc);
1683                 splx(cs);
1684                 break;
1685         case TIOCMGET:
1686                 setwin(sc,0);
1687                 port->imodem=bc->mstat;
1688                 hidewin(sc);
1689
1690                 tiocm_xxx = TIOCM_LE;   /* XXX - always enabled while open */
1691
1692                 DPRINT3(DB_MODEM,"dgb%d: port%d: modem stat -- ",unit,pnum);
1693
1694                 if (port->imodem & DTR) {
1695                         DPRINT1(DB_MODEM,"DTR ");
1696                         tiocm_xxx |= TIOCM_DTR;
1697                 }
1698                 if (port->imodem & RTS) {
1699                         DPRINT1(DB_MODEM,"RTS ");
1700                         tiocm_xxx |= TIOCM_RTS;
1701                 }
1702                 if (port->imodem & CTS) {
1703                         DPRINT1(DB_MODEM,"CTS ");
1704                         tiocm_xxx |= TIOCM_CTS;
1705                 }
1706                 if (port->imodem & port->dcd) {
1707                         DPRINT1(DB_MODEM,"DCD ");
1708                         tiocm_xxx |= TIOCM_CD;
1709                 }
1710                 if (port->imodem & port->dsr) {
1711                         DPRINT1(DB_MODEM,"DSR ");
1712                         tiocm_xxx |= TIOCM_DSR;
1713                 }
1714                 if (port->imodem & RI) {
1715                         DPRINT1(DB_MODEM,"RI ");
1716                         tiocm_xxx |= TIOCM_RI;
1717                 }
1718                 *(int *)data = tiocm_xxx;
1719                 DPRINT1(DB_MODEM,"--\n");
1720                 break;
1721         case TIOCMSDTRWAIT:
1722                 /* must be root since the wait applies to following logins */
1723                 error = suser(td);
1724                 if (error != 0) {
1725                         splx(s);
1726                         return (error);
1727                 }
1728                 port->close_delay = *(int *)data * hz / 100;
1729                 break;
1730         case TIOCMGDTRWAIT:
1731                 *(int *)data = port->close_delay * 100 / hz;
1732                 break;
1733         case TIOCTIMESTAMP:
1734                 port->do_timestamp = TRUE;
1735                 *(struct timeval *)data = port->timestamp;
1736                 break;
1737         case TIOCDCDTIMESTAMP:
1738                 port->do_dcd_timestamp = TRUE;
1739                 *(struct timeval *)data = port->dcd_timestamp;
1740                 break;
1741         default:
1742                 bmws_set(ws);
1743                 splx(s);
1744                 return ENOTTY;
1745         }
1746         bmws_set(ws);
1747         splx(s);
1748
1749         return 0;
1750 }
1751
1752 static void
1753 wakeflush(p)
1754         void *p;
1755 {
1756         struct dgb_p *port=p;
1757
1758         wakeup(&port->draining);
1759 }
1760
1761 /* wait for the output to drain */
1762
1763 static int
1764 dgbdrain(port)
1765         struct dgb_p    *port;
1766 {
1767         struct dgb_softc *sc=&dgb_softc[port->unit];
1768         volatile struct board_chan *bc=port->brdchan;
1769         int error;
1770         int head, tail;
1771
1772         BoardMemWinState ws=bmws_get();
1773
1774         setwin(sc,0);
1775
1776         bc->iempty=1;
1777         tail=bc->tout;
1778         head=bc->tin;
1779
1780         while(tail!=head) {
1781                 DPRINT5(DB_WR,"dgb%d: port%d: drain: head=%d tail=%d\n",
1782                         port->unit, port->pnum, head, tail);
1783
1784                 hidewin(sc);
1785                 port->draining=1;
1786                 timeout(wakeflush,port, hz);
1787                 error=tsleep(&port->draining, PCATCH, "dgdrn", 0);
1788                 port->draining=0;
1789                 setwin(sc,0);
1790
1791                 if (error != 0) {
1792                         DPRINT4(DB_WR,"dgb%d: port%d: tsleep(dgdrn) error=%d\n",
1793                                 port->unit,port->pnum,error);
1794
1795                         bc->iempty=0;
1796                         bmws_set(ws);
1797                         return error;
1798                 }
1799
1800                 tail=bc->tout;
1801                 head=bc->tin;
1802         }
1803         DPRINT5(DB_WR,"dgb%d: port%d: drain: head=%d tail=%d\n",
1804                 port->unit, port->pnum, head, tail);
1805         bmws_set(ws);
1806         return 0;
1807 }
1808
1809 /* wait for the output to drain */
1810 /* or simply clear the buffer it it's stopped */
1811
1812 static void
1813 dgb_drain_or_flush(port)
1814         struct dgb_p    *port;
1815 {
1816         struct tty *tp=port->tty;
1817         struct dgb_softc *sc=&dgb_softc[port->unit];
1818         volatile struct board_chan *bc=port->brdchan;
1819         int error;
1820         int lasttail;
1821         int head, tail;
1822
1823         setwin(sc,0);
1824
1825         lasttail=-1;
1826         bc->iempty=1;
1827         tail=bc->tout;
1828         head=bc->tin;
1829
1830         while(tail!=head /* && tail!=lasttail */ ) {
1831                 DPRINT5(DB_WR,"dgb%d: port%d: flush: head=%d tail=%d\n",
1832                         port->unit, port->pnum, head, tail);
1833
1834                 /* if there is no carrier simply clean the buffer */
1835                 if( !(tp->t_state & TS_CARR_ON) ) {
1836                         bc->tout=bc->tin=0;
1837                         bc->iempty=0;
1838                         hidewin(sc);
1839                         return;
1840                 }
1841
1842                 hidewin(sc);
1843                 port->draining=1;
1844                 timeout(wakeflush,port, hz);
1845                 error=tsleep(&port->draining, PCATCH, "dgfls", 0);
1846                 port->draining=0;
1847                 setwin(sc,0);
1848
1849                 if (error != 0) {
1850                         DPRINT4(DB_WR,"dgb%d: port%d: tsleep(dgfls) error=%d\n",
1851                                 port->unit,port->pnum,error);
1852
1853                         /* silently clean the buffer */
1854
1855                         bc->tout=bc->tin=0;
1856                         bc->iempty=0;
1857                         hidewin(sc);
1858                         return;
1859                 }
1860
1861                 lasttail=tail;
1862                 tail=bc->tout;
1863                 head=bc->tin;
1864         }
1865         hidewin(sc);
1866         DPRINT5(DB_WR,"dgb%d: port%d: flush: head=%d tail=%d\n",
1867                         port->unit, port->pnum, head, tail);
1868 }
1869
1870 static int
1871 dgbparam(tp, t)
1872         struct tty      *tp;
1873         struct termios  *t;
1874 {
1875         int unit=MINOR_TO_UNIT(minor(tp->t_dev));
1876         int pnum=MINOR_TO_PORT(minor(tp->t_dev));
1877         struct dgb_softc *sc=&dgb_softc[unit];
1878         struct dgb_p *port=&sc->ports[pnum];
1879         volatile struct board_chan *bc=port->brdchan;
1880         int cflag;
1881         int head;
1882         int mval;
1883         int iflag;
1884         int hflow;
1885         int cs;
1886
1887         BoardMemWinState ws=bmws_get();
1888
1889         DPRINT6(DB_PARAM,"dgb%d: port%d: dgbparm c=0x%x i=0x%x l=0x%x\n",unit,pnum,t->c_cflag,t->c_iflag,t->c_lflag);
1890
1891         if(port->mustdrain) {
1892                 DPRINT3(DB_PARAM,"dgb%d: port%d: must call dgbdrain()\n",unit,pnum);
1893                 dgbdrain(port);
1894         }
1895
1896         cflag=ttspeedtab(t->c_ospeed, dgbspeedtab);
1897
1898         if (t->c_ispeed == 0)
1899                 t->c_ispeed = t->c_ospeed;
1900
1901         if (cflag < 0 /* || cflag > 0 && t->c_ispeed != t->c_ospeed */) {
1902                 DPRINT4(DB_PARAM,"dgb%d: port%d: invalid cflag=0%o\n",unit,pnum,cflag);
1903                 return (EINVAL);
1904         }
1905
1906         cs=splclock();
1907         setwin(sc,0);
1908
1909         if(cflag==0) { /* hangup */
1910                 DPRINT3(DB_PARAM,"dgb%d: port%d: hangup\n",unit,pnum);
1911                 head=bc->rin;
1912                 bc->rout=head;
1913                 head=bc->tin;
1914                 fepcmd(port, STOUT, (unsigned)head, 0, 0, 0);
1915                 mval= port->omodem & ~(DTR|RTS);
1916         } else {
1917                 cflag |= dgbflags(dgb_cflags, t->c_cflag);
1918
1919                 if(cflag!=port->fepcflag) {
1920                         port->fepcflag=cflag;
1921                         DPRINT5(DB_PARAM,"dgb%d: port%d: set cflag=0x%x c=0x%x\n",
1922                                         unit,pnum,cflag,t->c_cflag&~CRTSCTS);
1923                         fepcmd(port, SETCTRLFLAGS, (unsigned)cflag, 0, 0, 0);
1924                 }
1925                 mval= port->omodem | (DTR|RTS);
1926         }
1927
1928         iflag=dgbflags(dgb_iflags, t->c_iflag);
1929         if(iflag!=port->fepiflag) {
1930                 port->fepiflag=iflag;
1931                 DPRINT5(DB_PARAM,"dgb%d: port%d: set iflag=0x%x c=0x%x\n",unit,pnum,iflag,t->c_iflag);
1932                 fepcmd(port, SETIFLAGS, (unsigned)iflag, 0, 0, 0);
1933         }
1934
1935         bc->mint=port->dcd;
1936
1937         hflow=dgbflags(dgb_flow, t->c_cflag);
1938         if(hflow!=port->hflow) {
1939                 port->hflow=hflow;
1940                 DPRINT5(DB_PARAM,"dgb%d: port%d: set hflow=0x%x f=0x%x\n",unit,pnum,hflow,t->c_cflag&CRTSCTS);
1941                 fepcmd(port, SETHFLOW, (unsigned)hflow, 0xff, 0, 1);
1942         }
1943
1944         if(port->omodem != mval) {
1945                 DPRINT5(DB_PARAM,"dgb%d: port%d: setting modem parameters 0x%x was 0x%x\n",
1946                         unit,pnum,mval,port->omodem);
1947                 port->omodem=mval;
1948                 fepcmd(port, SETMODEM, (unsigned)mval, RTS|DTR, 0, 1);
1949         }
1950
1951         if(port->fepstartc!=t->c_cc[VSTART] || port->fepstopc!=t->c_cc[VSTOP]) {
1952                 DPRINT5(DB_PARAM,"dgb%d: port%d: set startc=%d, stopc=%d\n",unit,pnum,t->c_cc[VSTART],t->c_cc[VSTOP]);
1953                 port->fepstartc=t->c_cc[VSTART];
1954                 port->fepstopc=t->c_cc[VSTOP];
1955                 fepcmd(port, SONOFFC, port->fepstartc, port->fepstopc, 0, 1);
1956         }
1957
1958         bmws_set(ws);
1959         splx(cs);
1960
1961         return 0;
1962
1963 }
1964
1965 static void
1966 dgbstart(tp)
1967         struct tty      *tp;
1968 {
1969         int unit;
1970         int pnum;
1971         struct dgb_p *port;
1972         struct dgb_softc *sc;
1973         volatile struct board_chan *bc;
1974         int head, tail;
1975         int size, ocount;
1976         int s;
1977         int wmask;
1978
1979         BoardMemWinState ws=bmws_get();
1980
1981         unit=MINOR_TO_UNIT(minor(tp->t_dev));
1982         pnum=MINOR_TO_PORT(minor(tp->t_dev));
1983         sc=&dgb_softc[unit];
1984         port=&sc->ports[pnum];
1985         bc=port->brdchan;
1986
1987         wmask=port->txbufsize-1;
1988
1989         s=spltty();
1990
1991         while( tp->t_outq.c_cc!=0 ) {
1992                 int cs;
1993 #ifndef TS_ASLEEP       /* post 2.0.5 FreeBSD */
1994                 ttwwakeup(tp);
1995 #else
1996                 if(tp->t_outq.c_cc <= tp->t_lowat) {
1997                         if(tp->t_state & TS_ASLEEP) {
1998                                 tp->t_state &= ~TS_ASLEEP;
1999                                 wakeup(TSA_OLOWAT(tp));
2000                         }
2001                         /*selwakeup(&tp->t_wsel);*/
2002                 }
2003 #endif
2004                 cs=splclock();
2005                 setwin(sc,0);
2006
2007                 head=bc->tin & wmask;
2008
2009                 do { tail=bc->tout; } while (tail != bc->tout);
2010                 tail=bc->tout & wmask;
2011
2012                 DPRINT5(DB_WR,"dgb%d: port%d: s tx head=%d tail=%d\n",unit,pnum,head,tail);
2013
2014 #ifdef LEAVE_FREE_CHARS
2015                 if(tail>head) {
2016                         size=tail-head-LEAVE_FREE_CHARS;
2017                         if (size <0)
2018                                 size=0;
2019                         } else {
2020                                 size=port->txbufsize-head;
2021                                 if(tail+port->txbufsize < head)
2022                                         size=0;
2023                         }
2024                 }
2025 #else
2026                 if(tail>head)
2027                         size=tail-head-1;
2028                 else {
2029                         size=port->txbufsize-head/*-1*/;
2030                         if(tail==0)
2031                                 size--;
2032                 }
2033 #endif
2034
2035                 if(size==0) {
2036                         bc->iempty=1; bc->ilow=1;
2037                         splx(cs);
2038                         bmws_set(ws);
2039                         tp->t_state|=TS_BUSY;
2040                         splx(s);
2041                         return;
2042                 }
2043
2044                 towin(sc,port->txwin);
2045
2046                 ocount=q_to_b(&tp->t_outq, __DEVOLATILE(u_char *, port->txptr+head), size);
2047                 head+=ocount;
2048                 if(head>=port->txbufsize)
2049                         head-=port->txbufsize;
2050
2051                 setwin(sc,0);
2052                 bc->tin=head;
2053
2054                 DPRINT5(DB_WR,"dgb%d: port%d: tx avail=%d count=%d\n",unit,pnum,size,ocount);
2055                 hidewin(sc);
2056                 splx(cs);
2057         }
2058
2059         bmws_set(ws);
2060         splx(s);
2061
2062 #ifndef TS_ASLEEP       /* post 2.0.5 FreeBSD */
2063         if(tp->t_state & TS_BUSY) {
2064                 tp->t_state&=~TS_BUSY;
2065                 linesw[tp->t_line].l_start(tp);
2066                 ttwwakeup(tp);
2067         }
2068 #else
2069         if(tp->t_state & TS_ASLEEP) {
2070                 tp->t_state &= ~TS_ASLEEP;
2071                 wakeup(TSA_OLOWAT(tp));
2072         }
2073         tp->t_state&=~TS_BUSY;
2074 #endif
2075 }
2076
2077 void
2078 dgbstop(tp, rw)
2079         struct tty      *tp;
2080         int             rw;
2081 {
2082         int unit;
2083         int pnum;
2084         struct dgb_p *port;
2085         struct dgb_softc *sc;
2086         volatile struct board_chan *bc;
2087         int s;
2088
2089         BoardMemWinState ws=bmws_get();
2090
2091         unit=MINOR_TO_UNIT(minor(tp->t_dev));
2092         pnum=MINOR_TO_PORT(minor(tp->t_dev));
2093
2094         sc=&dgb_softc[unit];
2095         port=&sc->ports[pnum];
2096         bc=port->brdchan;
2097
2098         DPRINT3(DB_WR,"dgb%d: port%d: stop\n",port->unit, port->pnum);
2099
2100         s = spltty();
2101         setwin(sc,0);
2102
2103         if (rw & FWRITE) {
2104                 /* clear output queue */
2105                 bc->tout=bc->tin=0;
2106                 bc->ilow=0;bc->iempty=0;
2107         }
2108         if (rw & FREAD) {
2109                 /* clear input queue */
2110                 bc->rout=bc->rin;
2111                 bc->idata=1;
2112         }
2113         hidewin(sc);
2114         bmws_set(ws);
2115         splx(s);
2116         dgbstart(tp);
2117 }
2118
2119 static void
2120 fepcmd(port, cmd, op1, op2, ncmds, bytecmd)
2121         struct dgb_p *port;
2122         unsigned cmd, op1, op2, ncmds, bytecmd;
2123 {
2124         struct dgb_softc *sc=&dgb_softc[port->unit];
2125         u_char *mem=sc->vmem;
2126         unsigned tail, head;
2127         int count, n;
2128
2129         if(port->status==DISABLED) {
2130                 printf("dgb%d: port%d: FEP command on disabled port\n",
2131                         port->unit, port->pnum);
2132                 return;
2133         }
2134
2135         /* setwin(sc,0); Require this to be set by caller */
2136         head=sc->mailbox->cin;
2137
2138         if(head>=(FEP_CMAX-FEP_CSTART) || (head & 3)) {
2139                 printf("dgb%d: port%d: wrong pointer head of command queue : 0x%x\n",
2140                         port->unit, port->pnum, head);
2141                 return;
2142         }
2143
2144         mem[head+FEP_CSTART+0]=cmd;
2145         mem[head+FEP_CSTART+1]=port->pnum;
2146         if(bytecmd) {
2147                 mem[head+FEP_CSTART+2]=op1;
2148                 mem[head+FEP_CSTART+3]=op2;
2149         } else {
2150                 mem[head+FEP_CSTART+2]=op1&0xff;
2151                 mem[head+FEP_CSTART+3]=(op1>>8)&0xff;
2152         }
2153
2154         DPRINT7(DB_FEP,"dgb%d: port%d: %s cmd=0x%x op1=0x%x op2=0x%x\n", port->unit, port->pnum,
2155                         (bytecmd)?"byte":"word", cmd, mem[head+FEP_CSTART+2], mem[head+FEP_CSTART+3]);
2156
2157         head=(head+4) & (FEP_CMAX-FEP_CSTART-4);
2158         sc->mailbox->cin=head;
2159
2160         count=FEPTIMEOUT;
2161
2162         while (count-- != 0) {
2163                 head=sc->mailbox->cin;
2164                 tail=sc->mailbox->cout;
2165
2166                 n = (head-tail) & (FEP_CMAX-FEP_CSTART-4);
2167                 if(n <= ncmds * (sizeof(ushort)*4))
2168                         return;
2169         }
2170         printf("dgb%d(%d): timeout on FEP cmd=0x%x\n", port->unit, port->pnum, cmd);
2171 }
2172
2173 static void
2174 disc_optim(tp, t)
2175         struct tty      *tp;
2176         struct termios  *t;
2177 {
2178         if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
2179             && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
2180             && (!(t->c_iflag & PARMRK)
2181                 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
2182             && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
2183             && linesw[tp->t_line].l_rint == ttyinput)
2184                 tp->t_state |= TS_CAN_BYPASS_L_RINT;
2185         else
2186                 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
2187 }