sys/dev/serial/rc/rc.c

   1 /*
   2  * Copyright (C) 1995 by Pavel Antonov, Moscow, Russia.
   3  * Copyright (C) 1995 by Andrey A. Chernov, Moscow, Russia.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  * $FreeBSD: src/sys/i386/isa/rc.c,v 1.53.2.1 2001/02/26 04:23:10 jlemon Exp $
  28  * $DragonFly: src/sys/dev/serial/rc/rc.c,v 1.4 2003/07/19 21:14:34 dillon Exp $
  29  *
  30  */
  31
  32 /*
  33  * SDL Communications Riscom/8 (based on Cirrus Logic CL-CD180) driver
  34  *
  35  */
  36
  37 #include "rc.h"
  38
  39 /*#define RCDEBUG*/
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/tty.h>
  44 #include <sys/proc.h>
  45 #include <sys/conf.h>
  46 #include <sys/dkstat.h>
  47 #include <sys/fcntl.h>
  48 #include <sys/interrupt.h>
  49 #include <sys/kernel.h>
  50 #include <machine/clock.h>
  51 #include <machine/ipl.h>
  52
  53 #include <i386/isa/isa_device.h>
  54
  55 #include <i386/isa/ic/cd180.h>
  56 #include <i386/isa/rcreg.h>
  57
  58 /* Prototypes */
  59 static int     rcprobe         __P((struct isa_device *));
  60 static int     rcattach        __P((struct isa_device *));
  61
  62 #define rcin(port)      RC_IN  (nec, port)
  63 #define rcout(port,v)   RC_OUT (nec, port, v)
  64
  65 #define WAITFORCCR(u,c) rc_wait0(nec, (u), (c), __LINE__)
  66 #define CCRCMD(u,c,cmd) WAITFORCCR((u), (c)); rcout(CD180_CCR, (cmd))
  67
  68 #define RC_IBUFSIZE     256
  69 #define RB_I_HIGH_WATER (TTYHOG - 2 * RC_IBUFSIZE)
  70 #define RC_OBUFSIZE     512
  71 #define RC_IHIGHWATER   (3 * RC_IBUFSIZE / 4)
  72 #define INPUT_FLAGS_SHIFT (2 * RC_IBUFSIZE)
  73 #define LOTS_OF_EVENTS  64
  74
  75 #define RC_FAKEID       0x10
  76
  77 #define RC_PROBED 1
  78 #define RC_ATTACHED 2
  79
  80 #define GET_UNIT(dev)   (minor(dev) & 0x3F)
  81 #define CALLOUT(dev)    (minor(dev) & 0x80)
  82
  83 /* For isa routines */
  84 struct isa_driver rcdriver = {
  85         rcprobe, rcattach, "rc"
  86 };
  87
  88 static  d_open_t        rcopen;
  89 static  d_close_t       rcclose;
  90 static  d_ioctl_t       rcioctl;
  91
  92 #define CDEV_MAJOR      63
  93 static struct cdevsw rc_cdevsw = {
  94         /* open */      rcopen,
  95         /* close */     rcclose,
  96         /* read */      ttyread,
  97         /* write */     ttywrite,
  98         /* ioctl */     rcioctl,
  99         /* poll */      ttypoll,
 100         /* mmap */      nommap,
 101         /* strategy */  nostrategy,
 102         /* name */      "rc",
 103         /* maj */       CDEV_MAJOR,
 104         /* dump */      nodump,
 105         /* psize */     nopsize,
 106         /* flags */     D_TTY | D_KQFILTER,
 107         /* bmaj */      -1,
 108         /* kqfilter */  ttykqfilter,
 109 };
 110
 111 /* Per-board structure */
 112 static struct rc_softc {
 113         u_int           rcb_probed;     /* 1 - probed, 2 - attached */
 114         u_int           rcb_addr;       /* Base I/O addr        */
 115         u_int           rcb_unit;       /* unit #               */
 116         u_char          rcb_dtr;        /* DTR status           */
 117         struct rc_chans *rcb_baserc;    /* base rc ptr          */
 118 } rc_softc[NRC];
 119
 120 /* Per-channel structure */
 121 static struct rc_chans  {
 122         struct rc_softc *rc_rcb;                /* back ptr             */
 123         u_short          rc_flags;              /* Misc. flags          */
 124         int              rc_chan;               /* Channel #            */
 125         u_char           rc_ier;                /* intr. enable reg     */
 126         u_char           rc_msvr;               /* modem sig. status    */
 127         u_char           rc_cor2;               /* options reg          */
 128         u_char           rc_pendcmd;            /* special cmd pending  */
 129         u_int            rc_dtrwait;            /* dtr timeout          */
 130         u_int            rc_dcdwaits;           /* how many waits DCD in open */
 131         u_char           rc_hotchar;            /* end packed optimize */
 132         struct tty      *rc_tp;                 /* tty struct           */
 133         u_char          *rc_iptr;               /* Chars input buffer         */
 134         u_char          *rc_hiwat;              /* hi-water mark        */
 135         u_char          *rc_bufend;             /* end of buffer        */
 136         u_char          *rc_optr;               /* ptr in output buf    */
 137         u_char          *rc_obufend;            /* end of output buf    */
 138         u_char           rc_ibuf[4 * RC_IBUFSIZE];  /* input buffer         */
 139         u_char           rc_obuf[RC_OBUFSIZE];  /* output buffer        */
 140 } rc_chans[NRC * CD180_NCHAN];
 141
 142 static int rc_scheduled_event = 0;
 143
 144 /* for pstat -t */
 145 static struct tty rc_tty[NRC * CD180_NCHAN];
 146 static const int  nrc_tty = NRC * CD180_NCHAN;
 147
 148 /* Flags */
 149 #define RC_DTR_OFF      0x0001          /* DTR wait, for close/open     */
 150 #define RC_ACTOUT       0x0002          /* Dial-out port active         */
 151 #define RC_RTSFLOW      0x0004          /* RTS flow ctl enabled         */
 152 #define RC_CTSFLOW      0x0008          /* CTS flow ctl enabled         */
 153 #define RC_DORXFER      0x0010          /* RXFER event planned          */
 154 #define RC_DOXXFER      0x0020          /* XXFER event planned          */
 155 #define RC_MODCHG       0x0040          /* Modem status changed         */
 156 #define RC_OSUSP        0x0080          /* Output suspended             */
 157 #define RC_OSBUSY       0x0100          /* start() routine in progress  */
 158 #define RC_WAS_BUFOVFL  0x0200          /* low-level buffer ovferflow   */
 159 #define RC_WAS_SILOVFL  0x0400          /* silo buffer overflow         */
 160 #define RC_SEND_RDY     0x0800          /* ready to send */
 161
 162 /* Table for translation of RCSR status bits to internal form */
 163 static int rc_rcsrt[16] = {
 164         0,             TTY_OE,               TTY_FE,
 165         TTY_FE|TTY_OE, TTY_PE,               TTY_PE|TTY_OE,
 166         TTY_PE|TTY_FE, TTY_PE|TTY_FE|TTY_OE, TTY_BI,
 167         TTY_BI|TTY_OE, TTY_BI|TTY_FE,        TTY_BI|TTY_FE|TTY_OE,
 168         TTY_BI|TTY_PE, TTY_BI|TTY_PE|TTY_OE, TTY_BI|TTY_PE|TTY_FE,
 169         TTY_BI|TTY_PE|TTY_FE|TTY_OE
 170 };
 171
 172 /* Static prototypes */
 173 static ointhand2_t rcintr;
 174 static void rc_hwreset          __P((int, int, unsigned int));
 175 static int  rc_test             __P((int, int));
 176 static void rc_discard_output   __P((struct rc_chans *));
 177 static void rc_hardclose        __P((struct rc_chans *));
 178 static int  rc_modctl           __P((struct rc_chans *, int, int));
 179 static void rc_start            __P((struct tty *));
 180 static void rc_stop              __P((struct tty *, int rw));
 181 static int  rc_param            __P((struct tty *, struct termios *));
 182 static swihand_t rcpoll;
 183 static void rc_reinit           __P((struct rc_softc *));
 184 #ifdef RCDEBUG
 185 static void printrcflags();
 186 #endif
 187 static timeout_t rc_dtrwakeup;
 188 static timeout_t rc_wakeup;
 189 static void disc_optim          __P((struct tty *tp, struct termios *t, struct rc_chans *));
 190 static void rc_wait0            __P((int nec, int unit, int chan, int line));
 191
 192 /**********************************************/
 193
 194 /* Quick device probing */
 195 static int
 196 rcprobe(dvp)
 197         struct  isa_device      *dvp;
 198 {
 199         int             irq = ffs(dvp->id_irq) - 1;
 200         register int    nec = dvp->id_iobase;
 201
 202         if (dvp->id_unit > NRC)
 203                 return 0;
 204         if (!RC_VALIDADDR(nec)) {
 205                 printf("rc%d: illegal base address %x\n", dvp->id_unit, nec);
 206                 return 0;
 207         }
 208         if (!RC_VALIDIRQ(irq)) {
 209                 printf("rc%d: illegal IRQ value %d\n", dvp->id_unit, irq);
 210                 return 0;
 211         }
 212         rcout(CD180_PPRL, 0x22); /* Random values to Prescale reg. */
 213         rcout(CD180_PPRH, 0x11);
 214         if (rcin(CD180_PPRL) != 0x22 || rcin(CD180_PPRH) != 0x11)
 215                 return 0;
 216         /* Now, test the board more thoroughly, with diagnostic */
 217         if (rc_test(nec, dvp->id_unit))
 218                 return 0;
 219         rc_softc[dvp->id_unit].rcb_probed = RC_PROBED;
 220
 221         return 0xF;
 222 }
 223
 224 static int
 225 rcattach(dvp)
 226         struct  isa_device      *dvp;
 227 {
 228         register int            chan, nec = dvp->id_iobase;
 229         struct rc_softc         *rcb = &rc_softc[dvp->id_unit];
 230         struct rc_chans         *rc  = &rc_chans[dvp->id_unit * CD180_NCHAN];
 231         static int              rc_started = 0;
 232         struct tty              *tp;
 233
 234         dvp->id_ointr = rcintr;
 235
 236         /* Thorooughly test the device */
 237         if (rcb->rcb_probed != RC_PROBED)
 238                 return 0;
 239         rcb->rcb_addr   = nec;
 240         rcb->rcb_dtr    = 0;
 241         rcb->rcb_baserc = rc;
 242         rcb->rcb_unit   = dvp->id_unit;
 243         /*rcb->rcb_chipid = 0x10 + dvp->id_unit;*/
 244         printf("rc%d: %d chans, firmware rev. %c\n", rcb->rcb_unit,
 245                 CD180_NCHAN, (rcin(CD180_GFRCR) & 0xF) + 'A');
 246
 247         for (chan = 0; chan < CD180_NCHAN; chan++, rc++) {
 248                 rc->rc_rcb     = rcb;
 249                 rc->rc_chan    = chan;
 250                 rc->rc_iptr    = rc->rc_ibuf;
 251                 rc->rc_bufend  = &rc->rc_ibuf[RC_IBUFSIZE];
 252                 rc->rc_hiwat   = &rc->rc_ibuf[RC_IHIGHWATER];
 253                 rc->rc_flags   = rc->rc_ier = rc->rc_msvr = 0;
 254                 rc->rc_cor2    = rc->rc_pendcmd = 0;
 255                 rc->rc_optr    = rc->rc_obufend  = rc->rc_obuf;
 256                 rc->rc_dtrwait = 3 * hz;
 257                 rc->rc_dcdwaits= 0;
 258                 rc->rc_hotchar = 0;
 259                 tp = rc->rc_tp = &rc_tty[chan + (dvp->id_unit * CD180_NCHAN)];
 260                 ttychars(tp);
 261                 tp->t_lflag = tp->t_iflag = tp->t_oflag = 0;
 262                 tp->t_cflag = TTYDEF_CFLAG;
 263                 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
 264         }
 265         rcb->rcb_probed = RC_ATTACHED;
 266         if (!rc_started) {
 267                 cdevsw_add(&rc_cdevsw);
 268                 register_swi(SWI_TTY, rcpoll);
 269                 rc_wakeup((void *)NULL);
 270                 rc_started = 1;
 271         }
 272         return 1;
 273 }
 274
 275 /* RC interrupt handling */
 276 static void
 277 rcintr(unit)
 278         int             unit;
 279 {
 280         register struct rc_softc        *rcb = &rc_softc[unit];
 281         register struct rc_chans        *rc;
 282         register int                    nec, resid;
 283         register u_char                 val, iack, bsr, ucnt, *optr;
 284         int                             good_data, t_state;
 285
 286         if (rcb->rcb_probed != RC_ATTACHED) {
 287                 printf("rc%d: bogus interrupt\n", unit);
 288                 return;
 289         }
 290         nec = rcb->rcb_addr;
 291
 292         bsr = ~(rcin(RC_BSR));
 293
 294         if (!(bsr & (RC_BSR_TOUT|RC_BSR_RXINT|RC_BSR_TXINT|RC_BSR_MOINT))) {
 295                 printf("rc%d: extra interrupt\n", unit);
 296                 rcout(CD180_EOIR, 0);
 297                 return;
 298         }
 299
 300         while (bsr & (RC_BSR_TOUT|RC_BSR_RXINT|RC_BSR_TXINT|RC_BSR_MOINT)) {
 301 #ifdef RCDEBUG_DETAILED
 302                 printf("rc%d: intr (%02x) %s%s%s%s\n", unit, bsr,
 303                         (bsr & RC_BSR_TOUT)?"TOUT ":"",
 304                         (bsr & RC_BSR_RXINT)?"RXINT ":"",
 305                         (bsr & RC_BSR_TXINT)?"TXINT ":"",
 306                         (bsr & RC_BSR_MOINT)?"MOINT":"");
 307 #endif
 308                 if (bsr & RC_BSR_TOUT) {
 309                         printf("rc%d: hardware failure, reset board\n", unit);
 310                         rcout(RC_CTOUT, 0);
 311                         rc_reinit(rcb);
 312                         return;
 313                 }
 314                 if (bsr & RC_BSR_RXINT) {
 315                         iack = rcin(RC_PILR_RX);
 316                         good_data = (iack == (GIVR_IT_RGDI | RC_FAKEID));
 317                         if (!good_data && iack != (GIVR_IT_REI | RC_FAKEID)) {
 318                                 printf("rc%d: fake rxint: %02x\n", unit, iack);
 319                                 goto more_intrs;
 320                         }
 321                         rc = rcb->rcb_baserc + ((rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH);
 322                         t_state = rc->rc_tp->t_state;
 323                         /* Do RTS flow control stuff */
 324                         if (  (rc->rc_flags & RC_RTSFLOW)
 325                             || !(t_state & TS_ISOPEN)
 326                            ) {
 327                                 if (  (   !(t_state & TS_ISOPEN)
 328                                        || (t_state & TS_TBLOCK)
 329                                       )
 330                                     && (rc->rc_msvr & MSVR_RTS)
 331                                    )
 332                                         rcout(CD180_MSVR,
 333                                                 rc->rc_msvr &= ~MSVR_RTS);
 334                                 else if (!(rc->rc_msvr & MSVR_RTS))
 335                                         rcout(CD180_MSVR,
 336                                                 rc->rc_msvr |= MSVR_RTS);
 337                         }
 338                         ucnt  = rcin(CD180_RDCR) & 0xF;
 339                         resid = 0;
 340
 341                         if (t_state & TS_ISOPEN) {
 342                                 /* check for input buffer overflow */
 343                                 if ((rc->rc_iptr + ucnt) >= rc->rc_bufend) {
 344                                         resid  = ucnt;
 345                                         ucnt   = rc->rc_bufend - rc->rc_iptr;
 346                                         resid -= ucnt;
 347                                         if (!(rc->rc_flags & RC_WAS_BUFOVFL)) {
 348                                                 rc->rc_flags |= RC_WAS_BUFOVFL;
 349                                                 rc_scheduled_event++;
 350                                         }
 351                                 }
 352                                 optr = rc->rc_iptr;
 353                                 /* check foor good data */
 354                                 if (good_data) {
 355                                         while (ucnt-- > 0) {
 356                                                 val = rcin(CD180_RDR);
 357                                                 optr[0] = val;
 358                                                 optr[INPUT_FLAGS_SHIFT] = 0;
 359                                                 optr++;
 360                                                 rc_scheduled_event++;
 361                                                 if (val != 0 && val == rc->rc_hotchar)
 362                                                         setsofttty();
 363                                         }
 364                                 } else {
 365                                         /* Store also status data */
 366                                         while (ucnt-- > 0) {
 367                                                 iack = rcin(CD180_RCSR);
 368                                                 if (iack & RCSR_Timeout)
 369                                                         break;
 370                                                 if (   (iack & RCSR_OE)
 371                                                     && !(rc->rc_flags & RC_WAS_SILOVFL)) {
 372                                                         rc->rc_flags |= RC_WAS_SILOVFL;
 373                                                         rc_scheduled_event++;
 374                                                 }
 375                                                 val = rcin(CD180_RDR);
 376                                                 /*
 377                                                   Don't store PE if IGNPAR and BREAK if IGNBRK,
 378                                                   this hack allows "raw" tty optimization
 379                                                   works even if IGN* is set.
 380                                                 */
 381                                                 if (   !(iack & (RCSR_PE|RCSR_FE|RCSR_Break))
 382                                                     || ((!(iack & (RCSR_PE|RCSR_FE))
 383                                                     ||  !(rc->rc_tp->t_iflag & IGNPAR))
 384                                                     && (!(iack & RCSR_Break)
 385                                                     ||  !(rc->rc_tp->t_iflag & IGNBRK)))) {
 386                                                         if (   (iack & (RCSR_PE|RCSR_FE))
 387                                                             && (t_state & TS_CAN_BYPASS_L_RINT)
 388                                                             && ((iack & RCSR_FE)
 389                                                             ||  ((iack & RCSR_PE)
 390                                                             &&  (rc->rc_tp->t_iflag & INPCK))))
 391                                                                 val = 0;
 392                                                         else if (val != 0 && val == rc->rc_hotchar)
 393                                                                 setsofttty();
 394                                                         optr[0] = val;
 395                                                         optr[INPUT_FLAGS_SHIFT] = iack;
 396                                                         optr++;
 397                                                         rc_scheduled_event++;
 398                                                 }
 399                                         }
 400                                 }
 401                                 rc->rc_iptr = optr;
 402                                 rc->rc_flags |= RC_DORXFER;
 403                         } else
 404                                 resid = ucnt;
 405                         /* Clear FIFO if necessary */
 406                         while (resid-- > 0) {
 407                                 if (!good_data)
 408                                         iack = rcin(CD180_RCSR);
 409                                 else
 410                                         iack = 0;
 411                                 if (iack & RCSR_Timeout)
 412                                         break;
 413                                 (void) rcin(CD180_RDR);
 414                         }
 415                         goto more_intrs;
 416                 }
 417                 if (bsr & RC_BSR_MOINT) {
 418                         iack = rcin(RC_PILR_MODEM);
 419                         if (iack != (GIVR_IT_MSCI | RC_FAKEID)) {
 420                                 printf("rc%d: fake moint: %02x\n", unit, iack);
 421                                 goto more_intrs;
 422                         }
 423                         rc = rcb->rcb_baserc + ((rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH);
 424                         iack = rcin(CD180_MCR);
 425                         rc->rc_msvr = rcin(CD180_MSVR);
 426                         rcout(CD180_MCR, 0);
 427 #ifdef RCDEBUG
 428                         printrcflags(rc, "moint");
 429 #endif
 430                         if (rc->rc_flags & RC_CTSFLOW) {
 431                                 if (rc->rc_msvr & MSVR_CTS)
 432                                         rc->rc_flags |= RC_SEND_RDY;
 433                                 else
 434                                         rc->rc_flags &= ~RC_SEND_RDY;
 435                         } else
 436                                 rc->rc_flags |= RC_SEND_RDY;
 437                         if ((iack & MCR_CDchg) && !(rc->rc_flags & RC_MODCHG)) {
 438                                 rc_scheduled_event += LOTS_OF_EVENTS;
 439                                 rc->rc_flags |= RC_MODCHG;
 440                                 setsofttty();
 441                         }
 442                         goto more_intrs;
 443                 }
 444                 if (bsr & RC_BSR_TXINT) {
 445                         iack = rcin(RC_PILR_TX);
 446                         if (iack != (GIVR_IT_TDI | RC_FAKEID)) {
 447                                 printf("rc%d: fake txint: %02x\n", unit, iack);
 448                                 goto more_intrs;
 449                         }
 450                         rc = rcb->rcb_baserc + ((rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH);
 451                         if (    (rc->rc_flags & RC_OSUSP)
 452                             || !(rc->rc_flags & RC_SEND_RDY)
 453                            )
 454                                 goto more_intrs;
 455                         /* Handle breaks and other stuff */
 456                         if (rc->rc_pendcmd) {
 457                                 rcout(CD180_COR2, rc->rc_cor2 |= COR2_ETC);
 458                                 rcout(CD180_TDR,  CD180_C_ESC);
 459                                 rcout(CD180_TDR,  rc->rc_pendcmd);
 460                                 rcout(CD180_COR2, rc->rc_cor2 &= ~COR2_ETC);
 461                                 rc->rc_pendcmd = 0;
 462                                 goto more_intrs;
 463                         }
 464                         optr = rc->rc_optr;
 465                         resid = rc->rc_obufend - optr;
 466                         if (resid > CD180_NFIFO)
 467                                 resid = CD180_NFIFO;
 468                         while (resid-- > 0)
 469                                 rcout(CD180_TDR, *optr++);
 470                         rc->rc_optr = optr;
 471
 472                         /* output completed? */
 473                         if (optr >= rc->rc_obufend) {
 474                                 rcout(CD180_IER, rc->rc_ier &= ~IER_TxRdy);
 475 #ifdef RCDEBUG
 476                                 printf("rc%d/%d: output completed\n", unit, rc->rc_chan);
 477 #endif
 478                                 if (!(rc->rc_flags & RC_DOXXFER)) {
 479                                         rc_scheduled_event += LOTS_OF_EVENTS;
 480                                         rc->rc_flags |= RC_DOXXFER;
 481                                         setsofttty();
 482                                 }
 483                         }
 484                 }
 485         more_intrs:
 486                 rcout(CD180_EOIR, 0);   /* end of interrupt */
 487                 rcout(RC_CTOUT, 0);
 488                 bsr = ~(rcin(RC_BSR));
 489         }
 490 }
 491
 492 /* Feed characters to output buffer */
 493 static void rc_start(tp)
 494 register struct tty *tp;
 495 {
 496         register struct rc_chans       *rc = &rc_chans[GET_UNIT(tp->t_dev)];
 497         register int                    nec = rc->rc_rcb->rcb_addr, s;
 498
 499         if (rc->rc_flags & RC_OSBUSY)
 500                 return;
 501         s = spltty();
 502         rc->rc_flags |= RC_OSBUSY;
 503         disable_intr();
 504         if (tp->t_state & TS_TTSTOP)
 505                 rc->rc_flags |= RC_OSUSP;
 506         else
 507                 rc->rc_flags &= ~RC_OSUSP;
 508         /* Do RTS flow control stuff */
 509         if (   (rc->rc_flags & RC_RTSFLOW)
 510             && (tp->t_state & TS_TBLOCK)
 511             && (rc->rc_msvr & MSVR_RTS)
 512            ) {
 513                 rcout(CD180_CAR, rc->rc_chan);
 514                 rcout(CD180_MSVR, rc->rc_msvr &= ~MSVR_RTS);
 515         } else if (!(rc->rc_msvr & MSVR_RTS)) {
 516                 rcout(CD180_CAR, rc->rc_chan);
 517                 rcout(CD180_MSVR, rc->rc_msvr |= MSVR_RTS);
 518         }
 519         enable_intr();
 520         if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP))
 521                 goto out;
 522 #ifdef RCDEBUG
 523         printrcflags(rc, "rcstart");
 524 #endif
 525         ttwwakeup(tp);
 526 #ifdef RCDEBUG
 527         printf("rcstart: outq = %d obuf = %d\n",
 528                 tp->t_outq.c_cc, rc->rc_obufend - rc->rc_optr);
 529 #endif
 530         if (tp->t_state & TS_BUSY)
 531                 goto    out;    /* output still in progress ... */
 532
 533         if (tp->t_outq.c_cc > 0) {
 534                 u_int   ocnt;
 535
 536                 tp->t_state |= TS_BUSY;
 537                 ocnt = q_to_b(&tp->t_outq, rc->rc_obuf, sizeof rc->rc_obuf);
 538                 disable_intr();
 539                 rc->rc_optr = rc->rc_obuf;
 540                 rc->rc_obufend = rc->rc_optr + ocnt;
 541                 enable_intr();
 542                 if (!(rc->rc_ier & IER_TxRdy)) {
 543 #ifdef RCDEBUG
 544                         printf("rc%d/%d: rcstart enable txint\n", rc->rc_rcb->rcb_unit, rc->rc_chan);
 545 #endif
 546                         rcout(CD180_CAR, rc->rc_chan);
 547                         rcout(CD180_IER, rc->rc_ier |= IER_TxRdy);
 548                 }
 549         }
 550 out:
 551         rc->rc_flags &= ~RC_OSBUSY;
 552         (void) splx(s);
 553 }
 554
 555 /* Handle delayed events. */
 556 void rcpoll()
 557 {
 558         register struct rc_chans *rc;
 559         register struct rc_softc *rcb;
 560         register u_char        *tptr, *eptr;
 561         register struct tty    *tp;
 562         register int            chan, icnt, nec, unit;
 563
 564         if (rc_scheduled_event == 0)
 565                 return;
 566 repeat:
 567         for (unit = 0; unit < NRC; unit++) {
 568                 rcb = &rc_softc[unit];
 569                 rc = rcb->rcb_baserc;
 570                 nec = rc->rc_rcb->rcb_addr;
 571                 for (chan = 0; chan < CD180_NCHAN; rc++, chan++) {
 572                         tp = rc->rc_tp;
 573 #ifdef RCDEBUG
 574                         if (rc->rc_flags & (RC_DORXFER|RC_DOXXFER|RC_MODCHG|
 575                             RC_WAS_BUFOVFL|RC_WAS_SILOVFL))
 576                                 printrcflags(rc, "rcevent");
 577 #endif
 578                         if (rc->rc_flags & RC_WAS_BUFOVFL) {
 579                                 disable_intr();
 580                                 rc->rc_flags &= ~RC_WAS_BUFOVFL;
 581                                 rc_scheduled_event--;
 582                                 enable_intr();
 583                                 printf("rc%d/%d: interrupt-level buffer overflow\n",
 584                                         unit, chan);
 585                         }
 586                         if (rc->rc_flags & RC_WAS_SILOVFL) {
 587                                 disable_intr();
 588                                 rc->rc_flags &= ~RC_WAS_SILOVFL;
 589                                 rc_scheduled_event--;
 590                                 enable_intr();
 591                                 printf("rc%d/%d: silo overflow\n",
 592                                         unit, chan);
 593                         }
 594                         if (rc->rc_flags & RC_MODCHG) {
 595                                 disable_intr();
 596                                 rc->rc_flags &= ~RC_MODCHG;
 597                                 rc_scheduled_event -= LOTS_OF_EVENTS;
 598                                 enable_intr();
 599                                 (*linesw[tp->t_line].l_modem)(tp, !!(rc->rc_msvr & MSVR_CD));
 600                         }
 601                         if (rc->rc_flags & RC_DORXFER) {
 602                                 disable_intr();
 603                                 rc->rc_flags &= ~RC_DORXFER;
 604                                 eptr = rc->rc_iptr;
 605                                 if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE])
 606                                         tptr = &rc->rc_ibuf[RC_IBUFSIZE];
 607                                 else
 608                                         tptr = rc->rc_ibuf;
 609                                 icnt = eptr - tptr;
 610                                 if (icnt > 0) {
 611                                         if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE]) {
 612                                                 rc->rc_iptr   = rc->rc_ibuf;
 613                                                 rc->rc_bufend = &rc->rc_ibuf[RC_IBUFSIZE];
 614                                                 rc->rc_hiwat  = &rc->rc_ibuf[RC_IHIGHWATER];
 615                                         } else {
 616                                                 rc->rc_iptr   = &rc->rc_ibuf[RC_IBUFSIZE];
 617                                                 rc->rc_bufend = &rc->rc_ibuf[2 * RC_IBUFSIZE];
 618                                                 rc->rc_hiwat  =
 619                                                         &rc->rc_ibuf[RC_IBUFSIZE + RC_IHIGHWATER];
 620                                         }
 621                                         if (   (rc->rc_flags & RC_RTSFLOW)
 622                                             && (tp->t_state & TS_ISOPEN)
 623                                             && !(tp->t_state & TS_TBLOCK)
 624                                             && !(rc->rc_msvr & MSVR_RTS)
 625                                             ) {
 626                                                 rcout(CD180_CAR, chan);
 627                                                 rcout(CD180_MSVR,
 628                                                         rc->rc_msvr |= MSVR_RTS);
 629                                         }
 630                                         rc_scheduled_event -= icnt;
 631                                 }
 632                                 enable_intr();
 633
 634                                 if (icnt <= 0 || !(tp->t_state & TS_ISOPEN))
 635                                         goto done1;
 636
 637                                 if (   (tp->t_state & TS_CAN_BYPASS_L_RINT)
 638                                     && !(tp->t_state & TS_LOCAL)) {
 639                                         if ((tp->t_rawq.c_cc + icnt) >= RB_I_HIGH_WATER
 640                                             && ((rc->rc_flags & RC_RTSFLOW) || (tp->t_iflag & IXOFF))
 641                                             && !(tp->t_state & TS_TBLOCK))
 642                                                 ttyblock(tp);
 643                                         tk_nin += icnt;
 644                                         tk_rawcc += icnt;
 645                                         tp->t_rawcc += icnt;
 646                                         if (b_to_q(tptr, icnt, &tp->t_rawq))
 647                                                 printf("rc%d/%d: tty-level buffer overflow\n",
 648                                                         unit, chan);
 649                                         ttwakeup(tp);
 650                                         if ((tp->t_state & TS_TTSTOP) && ((tp->t_iflag & IXANY)
 651                                             || (tp->t_cc[VSTART] == tp->t_cc[VSTOP]))) {
 652                                                 tp->t_state &= ~TS_TTSTOP;
 653                                                 tp->t_lflag &= ~FLUSHO;
 654                                                 rc_start(tp);
 655                                         }
 656                                 } else {
 657                                         for (; tptr < eptr; tptr++)
 658                                                 (*linesw[tp->t_line].l_rint)
 659                                                     (tptr[0] |
 660                                                     rc_rcsrt[tptr[INPUT_FLAGS_SHIFT] & 0xF], tp);
 661                                 }
 662 done1: ;
 663                         }
 664                         if (rc->rc_flags & RC_DOXXFER) {
 665                                 disable_intr();
 666                                 rc_scheduled_event -= LOTS_OF_EVENTS;
 667                                 rc->rc_flags &= ~RC_DOXXFER;
 668                                 rc->rc_tp->t_state &= ~TS_BUSY;
 669                                 enable_intr();
 670                                 (*linesw[tp->t_line].l_start)(tp);
 671                         }
 672                 }
 673                 if (rc_scheduled_event == 0)
 674                         break;
 675         }
 676         if (rc_scheduled_event >= LOTS_OF_EVENTS)
 677                 goto repeat;
 678 }
 679
 680 static  void
 681 rc_stop(tp, rw)
 682         register struct tty     *tp;
 683         int                     rw;
 684 {
 685         register struct rc_chans        *rc = &rc_chans[GET_UNIT(tp->t_dev)];
 686         u_char *tptr, *eptr;
 687
 688 #ifdef RCDEBUG
 689         printf("rc%d/%d: rc_stop %s%s\n", rc->rc_rcb->rcb_unit, rc->rc_chan,
 690                 (rw & FWRITE)?"FWRITE ":"", (rw & FREAD)?"FREAD":"");
 691 #endif
 692         if (rw & FWRITE)
 693                 rc_discard_output(rc);
 694         disable_intr();
 695         if (rw & FREAD) {
 696                 rc->rc_flags &= ~RC_DORXFER;
 697                 eptr = rc->rc_iptr;
 698                 if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE]) {
 699                         tptr = &rc->rc_ibuf[RC_IBUFSIZE];
 700                         rc->rc_iptr = &rc->rc_ibuf[RC_IBUFSIZE];
 701                 } else {
 702                         tptr = rc->rc_ibuf;
 703                         rc->rc_iptr = rc->rc_ibuf;
 704                 }
 705                 rc_scheduled_event -= eptr - tptr;
 706         }
 707         if (tp->t_state & TS_TTSTOP)
 708                 rc->rc_flags |= RC_OSUSP;
 709         else
 710                 rc->rc_flags &= ~RC_OSUSP;
 711         enable_intr();
 712 }
 713
 714 static  int
 715 rcopen(dev, flag, mode, p)
 716         dev_t           dev;
 717         int             flag, mode;
 718         struct proc    *p;
 719 {
 720         register struct rc_chans *rc;
 721         register struct tty      *tp;
 722         int             unit, nec, s, error = 0;
 723
 724         unit = GET_UNIT(dev);
 725         if (unit >= NRC * CD180_NCHAN)
 726                 return ENXIO;
 727         if (rc_softc[unit / CD180_NCHAN].rcb_probed != RC_ATTACHED)
 728                 return ENXIO;
 729         rc  = &rc_chans[unit];
 730         tp  = rc->rc_tp;
 731         dev->si_tty = tp;
 732         nec = rc->rc_rcb->rcb_addr;
 733 #ifdef RCDEBUG
 734         printf("rc%d/%d: rcopen: dev %x\n", rc->rc_rcb->rcb_unit, unit, dev);
 735 #endif
 736         s = spltty();
 737
 738 again:
 739         while (rc->rc_flags & RC_DTR_OFF) {
 740                 error = tsleep(&(rc->rc_dtrwait), PCATCH, "rcdtr", 0);
 741                 if (error != 0)
 742                         goto out;
 743         }
 744         if (tp->t_state & TS_ISOPEN) {
 745                 if (CALLOUT(dev)) {
 746                         if (!(rc->rc_flags & RC_ACTOUT)) {
 747                                 error = EBUSY;
 748                                 goto out;
 749                         }
 750                 } else {
 751                         if (rc->rc_flags & RC_ACTOUT) {
 752                                 if (flag & O_NONBLOCK) {
 753                                         error = EBUSY;
 754                                         goto out;
 755                                 }
 756                                 error = tsleep(&rc->rc_rcb, PCATCH, "rcbi", 0);
 757                                 if (error)
 758                                         goto out;
 759                                 goto again;
 760                         }
 761                 }
 762                 if (tp->t_state & TS_XCLUDE &&
 763                     suser(td)) {
 764                         error = EBUSY;
 765                         goto out;
 766                 }
 767         } else {
 768                 tp->t_oproc   = rc_start;
 769                 tp->t_param   = rc_param;
 770                 tp->t_stop    = rc_stop;
 771                 tp->t_dev     = dev;
 772
 773                 if (CALLOUT(dev))
 774                         tp->t_cflag |= CLOCAL;
 775                 else
 776                         tp->t_cflag &= ~CLOCAL;
 777
 778                 error = rc_param(tp, &tp->t_termios);
 779                 if (error)
 780                         goto out;
 781                 (void) rc_modctl(rc, TIOCM_RTS|TIOCM_DTR, DMSET);
 782
 783                 if ((rc->rc_msvr & MSVR_CD) || CALLOUT(dev))
 784                         (*linesw[tp->t_line].l_modem)(tp, 1);
 785         }
 786         if (!(tp->t_state & TS_CARR_ON) && !CALLOUT(dev)
 787             && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) {
 788                 rc->rc_dcdwaits++;
 789                 error = tsleep(TSA_CARR_ON(tp), PCATCH, "rcdcd", 0);
 790                 rc->rc_dcdwaits--;
 791                 if (error != 0)
 792                         goto out;
 793                 goto again;
 794         }
 795         error = (*linesw[tp->t_line].l_open)(dev, tp);
 796         disc_optim(tp, &tp->t_termios, rc);
 797         if ((tp->t_state & TS_ISOPEN) && CALLOUT(dev))
 798                 rc->rc_flags |= RC_ACTOUT;
 799 out:
 800         (void) splx(s);
 801
 802         if(rc->rc_dcdwaits == 0 && !(tp->t_state & TS_ISOPEN))
 803                 rc_hardclose(rc);
 804
 805         return error;
 806 }
 807
 808 static  int
 809 rcclose(dev, flag, mode, p)
 810         dev_t           dev;
 811         int             flag, mode;
 812         struct proc    *p;
 813 {
 814         register struct rc_chans *rc;
 815         register struct tty      *tp;
 816         int  s, unit = GET_UNIT(dev);
 817
 818         if (unit >= NRC * CD180_NCHAN)
 819                 return ENXIO;
 820         rc  = &rc_chans[unit];
 821         tp  = rc->rc_tp;
 822 #ifdef RCDEBUG
 823         printf("rc%d/%d: rcclose dev %x\n", rc->rc_rcb->rcb_unit, unit, dev);
 824 #endif
 825         s = spltty();
 826         (*linesw[tp->t_line].l_close)(tp, flag);
 827         disc_optim(tp, &tp->t_termios, rc);
 828         rc_stop(tp, FREAD | FWRITE);
 829         rc_hardclose(rc);
 830         ttyclose(tp);
 831         splx(s);
 832         return 0;
 833 }
 834
 835 static void rc_hardclose(rc)
 836 register struct rc_chans *rc;
 837 {
 838         register int s, nec = rc->rc_rcb->rcb_addr;
 839         register struct tty *tp = rc->rc_tp;
 840
 841         s = spltty();
 842         rcout(CD180_CAR, rc->rc_chan);
 843
 844         /* Disable rx/tx intrs */
 845         rcout(CD180_IER, rc->rc_ier = 0);
 846         if (   (tp->t_cflag & HUPCL)
 847             || (!(rc->rc_flags & RC_ACTOUT)
 848                && !(rc->rc_msvr & MSVR_CD)
 849                && !(tp->t_cflag & CLOCAL))
 850             || !(tp->t_state & TS_ISOPEN)
 851            ) {
 852                 CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan, CCR_ResetChan);
 853                 WAITFORCCR(rc->rc_rcb->rcb_unit, rc->rc_chan);
 854                 (void) rc_modctl(rc, TIOCM_RTS, DMSET);
 855                 if (rc->rc_dtrwait) {
 856                         timeout(rc_dtrwakeup, rc, rc->rc_dtrwait);
 857                         rc->rc_flags |= RC_DTR_OFF;
 858                 }
 859         }
 860         rc->rc_flags &= ~RC_ACTOUT;
 861         wakeup((caddr_t) &rc->rc_rcb);  /* wake bi */
 862         wakeup(TSA_CARR_ON(tp));
 863         (void) splx(s);
 864 }
 865
 866 /* Reset the bastard */
 867 static void rc_hwreset(unit, nec, chipid)
 868         register int    unit, nec;
 869         unsigned int    chipid;
 870 {
 871         CCRCMD(unit, -1, CCR_HWRESET);            /* Hardware reset */
 872         DELAY(20000);
 873         WAITFORCCR(unit, -1);
 874
 875         rcout(RC_CTOUT, 0);             /* Clear timeout  */
 876         rcout(CD180_GIVR,  chipid);
 877         rcout(CD180_GICR,  0);
 878
 879         /* Set Prescaler Registers (1 msec) */
 880         rcout(CD180_PPRL, ((RC_OSCFREQ + 999) / 1000) & 0xFF);
 881         rcout(CD180_PPRH, ((RC_OSCFREQ + 999) / 1000) >> 8);
 882
 883         /* Initialize Priority Interrupt Level Registers */
 884         rcout(CD180_PILR1, RC_PILR_MODEM);
 885         rcout(CD180_PILR2, RC_PILR_TX);
 886         rcout(CD180_PILR3, RC_PILR_RX);
 887
 888         /* Reset DTR */
 889         rcout(RC_DTREG, ~0);
 890 }
 891
 892 /* Set channel parameters */
 893 static int rc_param(tp, ts)
 894         register struct  tty    *tp;
 895         struct termios          *ts;
 896 {
 897         register struct rc_chans *rc = &rc_chans[GET_UNIT(tp->t_dev)];
 898         register int    nec = rc->rc_rcb->rcb_addr;
 899         int      idivs, odivs, s, val, cflag, iflag, lflag, inpflow;
 900
 901         if (   ts->c_ospeed < 0 || ts->c_ospeed > 76800
 902             || ts->c_ispeed < 0 || ts->c_ispeed > 76800
 903            )
 904                 return (EINVAL);
 905         if (ts->c_ispeed == 0)
 906                 ts->c_ispeed = ts->c_ospeed;
 907         odivs = RC_BRD(ts->c_ospeed);
 908         idivs = RC_BRD(ts->c_ispeed);
 909
 910         s = spltty();
 911
 912         /* Select channel */
 913         rcout(CD180_CAR, rc->rc_chan);
 914
 915         /* If speed == 0, hangup line */
 916         if (ts->c_ospeed == 0) {
 917                 CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan, CCR_ResetChan);
 918                 WAITFORCCR(rc->rc_rcb->rcb_unit, rc->rc_chan);
 919                 (void) rc_modctl(rc, TIOCM_DTR, DMBIC);
 920         }
 921
 922         tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
 923         cflag = ts->c_cflag;
 924         iflag = ts->c_iflag;
 925         lflag = ts->c_lflag;
 926
 927         if (idivs > 0) {
 928                 rcout(CD180_RBPRL, idivs & 0xFF);
 929                 rcout(CD180_RBPRH, idivs >> 8);
 930         }
 931         if (odivs > 0) {
 932                 rcout(CD180_TBPRL, odivs & 0xFF);
 933                 rcout(CD180_TBPRH, odivs >> 8);
 934         }
 935
 936         /* set timeout value */
 937         if (ts->c_ispeed > 0) {
 938                 int itm = ts->c_ispeed > 2400 ? 5 : 10000 / ts->c_ispeed + 1;
 939
 940                 if (   !(lflag & ICANON)
 941                     && ts->c_cc[VMIN] != 0 && ts->c_cc[VTIME] != 0
 942                     && ts->c_cc[VTIME] * 10 > itm)
 943                         itm = ts->c_cc[VTIME] * 10;
 944
 945                 rcout(CD180_RTPR, itm <= 255 ? itm : 255);
 946         }
 947
 948         switch (cflag & CSIZE) {
 949                 case CS5:       val = COR1_5BITS;      break;
 950                 case CS6:       val = COR1_6BITS;      break;
 951                 case CS7:       val = COR1_7BITS;      break;
 952                 default:
 953                 case CS8:       val = COR1_8BITS;      break;
 954         }
 955         if (cflag & PARENB) {
 956                 val |= COR1_NORMPAR;
 957                 if (cflag & PARODD)
 958                         val |= COR1_ODDP;
 959                 if (!(cflag & INPCK))
 960                         val |= COR1_Ignore;
 961         } else
 962                 val |= COR1_Ignore;
 963         if (cflag & CSTOPB)
 964                 val |= COR1_2SB;
 965         rcout(CD180_COR1, val);
 966
 967         /* Set FIFO threshold */
 968         val = ts->c_ospeed <= 4800 ? 1 : CD180_NFIFO / 2;
 969         inpflow = 0;
 970         if (   (iflag & IXOFF)
 971             && (   ts->c_cc[VSTOP] != _POSIX_VDISABLE
 972                 && (   ts->c_cc[VSTART] != _POSIX_VDISABLE
 973                     || (iflag & IXANY)
 974                    )
 975                )
 976            ) {
 977                 inpflow = 1;
 978                 val |= COR3_SCDE|COR3_FCT;
 979         }
 980         rcout(CD180_COR3, val);
 981
 982         /* Initialize on-chip automatic flow control */
 983         val = 0;
 984         rc->rc_flags &= ~(RC_CTSFLOW|RC_SEND_RDY);
 985         if (cflag & CCTS_OFLOW) {
 986                 rc->rc_flags |= RC_CTSFLOW;
 987                 val |= COR2_CtsAE;
 988         } else
 989                 rc->rc_flags |= RC_SEND_RDY;
 990         if (tp->t_state & TS_TTSTOP)
 991                 rc->rc_flags |= RC_OSUSP;
 992         else
 993                 rc->rc_flags &= ~RC_OSUSP;
 994         if (cflag & CRTS_IFLOW)
 995                 rc->rc_flags |= RC_RTSFLOW;
 996         else
 997                 rc->rc_flags &= ~RC_RTSFLOW;
 998
 999         if (inpflow) {
1000                 if (ts->c_cc[VSTART] != _POSIX_VDISABLE)
1001                         rcout(CD180_SCHR1, ts->c_cc[VSTART]);
1002                 rcout(CD180_SCHR2, ts->c_cc[VSTOP]);
1003                 val |= COR2_TxIBE;
1004                 if (iflag & IXANY)
1005                         val |= COR2_IXM;
1006         }
1007
1008         rcout(CD180_COR2, rc->rc_cor2 = val);
1009
1010         CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan,
1011                 CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
1012
1013         disc_optim(tp, ts, rc);
1014
1015         /* modem ctl */
1016         val = cflag & CLOCAL ? 0 : MCOR1_CDzd;
1017         if (cflag & CCTS_OFLOW)
1018                 val |= MCOR1_CTSzd;
1019         rcout(CD180_MCOR1, val);
1020
1021         val = cflag & CLOCAL ? 0 : MCOR2_CDod;
1022         if (cflag & CCTS_OFLOW)
1023                 val |= MCOR2_CTSod;
1024         rcout(CD180_MCOR2, val);
1025
1026         /* enable i/o and interrupts */
1027         CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan,
1028                 CCR_XMTREN | ((cflag & CREAD) ? CCR_RCVREN : CCR_RCVRDIS));
1029         WAITFORCCR(rc->rc_rcb->rcb_unit, rc->rc_chan);
1030
1031         rc->rc_ier = cflag & CLOCAL ? 0 : IER_CD;
1032         if (cflag & CCTS_OFLOW)
1033                 rc->rc_ier |= IER_CTS;
1034         if (cflag & CREAD)
1035                 rc->rc_ier |= IER_RxData;
1036         if (tp->t_state & TS_BUSY)
1037                 rc->rc_ier |= IER_TxRdy;
1038         if (ts->c_ospeed != 0)
1039                 rc_modctl(rc, TIOCM_DTR, DMBIS);
1040         if ((cflag & CCTS_OFLOW) && (rc->rc_msvr & MSVR_CTS))
1041                 rc->rc_flags |= RC_SEND_RDY;
1042         rcout(CD180_IER, rc->rc_ier);
1043         (void) splx(s);
1044         return 0;
1045 }
1046
1047 /* Re-initialize board after bogus interrupts */
1048 static void rc_reinit(rcb)
1049 struct rc_softc         *rcb;
1050 {
1051         register struct rc_chans       *rc, *rce;
1052         register int                    nec;
1053
1054         nec = rcb->rcb_addr;
1055         rc_hwreset(rcb->rcb_unit, nec, RC_FAKEID);
1056         rc  = &rc_chans[rcb->rcb_unit * CD180_NCHAN];
1057         rce = rc + CD180_NCHAN;
1058         for (; rc < rce; rc++)
1059                 (void) rc_param(rc->rc_tp, &rc->rc_tp->t_termios);
1060 }
1061
1062 static  int
1063 rcioctl(dev, cmd, data, flag, p)
1064 dev_t           dev;
1065 u_long          cmd;
1066 int             flag;
1067 caddr_t         data;
1068 struct proc     *p;
1069 {
1070         register struct rc_chans       *rc = &rc_chans[GET_UNIT(dev)];
1071         register int                    s, error;
1072         struct tty                     *tp = rc->rc_tp;
1073
1074         error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
1075         if (error != ENOIOCTL)
1076                 return (error);
1077         error = ttioctl(tp, cmd, data, flag);
1078         disc_optim(tp, &tp->t_termios, rc);
1079         if (error != ENOIOCTL)
1080                 return (error);
1081         s = spltty();
1082
1083         switch (cmd) {
1084             case TIOCSBRK:
1085                 rc->rc_pendcmd = CD180_C_SBRK;
1086                 break;
1087
1088             case TIOCCBRK:
1089                 rc->rc_pendcmd = CD180_C_EBRK;
1090                 break;
1091
1092             case TIOCSDTR:
1093                 (void) rc_modctl(rc, TIOCM_DTR, DMBIS);
1094                 break;
1095
1096             case TIOCCDTR:
1097                 (void) rc_modctl(rc, TIOCM_DTR, DMBIC);
1098                 break;
1099
1100             case TIOCMGET:
1101                 *(int *) data = rc_modctl(rc, 0, DMGET);
1102                 break;
1103
1104             case TIOCMSET:
1105                 (void) rc_modctl(rc, *(int *) data, DMSET);
1106                 break;
1107
1108             case TIOCMBIC:
1109                 (void) rc_modctl(rc, *(int *) data, DMBIC);
1110                 break;
1111
1112             case TIOCMBIS:
1113                 (void) rc_modctl(rc, *(int *) data, DMBIS);
1114                 break;
1115
1116             case TIOCMSDTRWAIT:
1117                 error = suser(td);
1118                 if (error != 0) {
1119                         splx(s);
1120                         return (error);
1121                 }
1122                 rc->rc_dtrwait = *(int *)data * hz / 100;
1123                 break;
1124
1125             case TIOCMGDTRWAIT:
1126                 *(int *)data = rc->rc_dtrwait * 100 / hz;
1127                 break;
1128
1129             default:
1130                 (void) splx(s);
1131                 return ENOTTY;
1132         }
1133         (void) splx(s);
1134         return 0;
1135 }
1136
1137
1138 /* Modem control routines */
1139
1140 static int rc_modctl(rc, bits, cmd)
1141 register struct rc_chans       *rc;
1142 int                             bits, cmd;
1143 {
1144         register int    nec = rc->rc_rcb->rcb_addr;
1145         u_char         *dtr = &rc->rc_rcb->rcb_dtr, msvr;
1146
1147         rcout(CD180_CAR, rc->rc_chan);
1148
1149         switch (cmd) {
1150             case DMSET:
1151                 rcout(RC_DTREG, (bits & TIOCM_DTR) ?
1152                                 ~(*dtr |= 1 << rc->rc_chan) :
1153                                 ~(*dtr &= ~(1 << rc->rc_chan)));
1154                 msvr = rcin(CD180_MSVR);
1155                 if (bits & TIOCM_RTS)
1156                         msvr |= MSVR_RTS;
1157                 else
1158                         msvr &= ~MSVR_RTS;
1159                 if (bits & TIOCM_DTR)
1160                         msvr |= MSVR_DTR;
1161                 else
1162                         msvr &= ~MSVR_DTR;
1163                 rcout(CD180_MSVR, msvr);
1164                 break;
1165
1166             case DMBIS:
1167                 if (bits & TIOCM_DTR)
1168                         rcout(RC_DTREG, ~(*dtr |= 1 << rc->rc_chan));
1169                 msvr = rcin(CD180_MSVR);
1170                 if (bits & TIOCM_RTS)
1171                         msvr |= MSVR_RTS;
1172                 if (bits & TIOCM_DTR)
1173                         msvr |= MSVR_DTR;
1174                 rcout(CD180_MSVR, msvr);
1175                 break;
1176
1177             case DMGET:
1178                 bits = TIOCM_LE;
1179                 msvr = rc->rc_msvr = rcin(CD180_MSVR);
1180
1181                 if (msvr & MSVR_RTS)
1182                         bits |= TIOCM_RTS;
1183                 if (msvr & MSVR_CTS)
1184                         bits |= TIOCM_CTS;
1185                 if (msvr & MSVR_DSR)
1186                         bits |= TIOCM_DSR;
1187                 if (msvr & MSVR_DTR)
1188                         bits |= TIOCM_DTR;
1189                 if (msvr & MSVR_CD)
1190                         bits |= TIOCM_CD;
1191                 if (~rcin(RC_RIREG) & (1 << rc->rc_chan))
1192                         bits |= TIOCM_RI;
1193                 return bits;
1194
1195             case DMBIC:
1196                 if (bits & TIOCM_DTR)
1197                         rcout(RC_DTREG, ~(*dtr &= ~(1 << rc->rc_chan)));
1198                 msvr = rcin(CD180_MSVR);
1199                 if (bits & TIOCM_RTS)
1200                         msvr &= ~MSVR_RTS;
1201                 if (bits & TIOCM_DTR)
1202                         msvr &= ~MSVR_DTR;
1203                 rcout(CD180_MSVR, msvr);
1204                 break;
1205         }
1206         rc->rc_msvr = rcin(CD180_MSVR);
1207         return 0;
1208 }
1209
1210 /* Test the board. */
1211 int rc_test(nec, unit)
1212         register int    nec;
1213         int             unit;
1214 {
1215         int     chan = 0;
1216         int     i = 0, rcnt, old_level;
1217         unsigned int    iack, chipid;
1218         unsigned short  divs;
1219         static  u_char  ctest[] = "\377\125\252\045\244\0\377";
1220 #define CTLEN   8
1221 #define ERR(s)  { \
1222                 printf("rc%d: ", unit); printf s ; printf("\n"); \
1223                 (void) splx(old_level); return 1; }
1224
1225         struct rtest {
1226                 u_char  txbuf[CD180_NFIFO];     /* TX buffer  */
1227                 u_char  rxbuf[CD180_NFIFO];     /* RX buffer  */
1228                 int     rxptr;                  /* RX pointer */
1229                 int     txptr;                  /* TX pointer */
1230         } tchans[CD180_NCHAN];
1231
1232         old_level = spltty();
1233
1234         chipid = RC_FAKEID;
1235
1236         /* First, reset board to inital state */
1237         rc_hwreset(unit, nec, chipid);
1238
1239         divs = RC_BRD(19200);
1240
1241         /* Initialize channels */
1242         for (chan = 0; chan < CD180_NCHAN; chan++) {
1243
1244                 /* Select and reset channel */
1245                 rcout(CD180_CAR, chan);
1246                 CCRCMD(unit, chan, CCR_ResetChan);
1247                 WAITFORCCR(unit, chan);
1248
1249                 /* Set speed */
1250                 rcout(CD180_RBPRL, divs & 0xFF);
1251                 rcout(CD180_RBPRH, divs >> 8);
1252                 rcout(CD180_TBPRL, divs & 0xFF);
1253                 rcout(CD180_TBPRH, divs >> 8);
1254
1255                 /* set timeout value */
1256                 rcout(CD180_RTPR,  0);
1257
1258                 /* Establish local loopback */
1259                 rcout(CD180_COR1, COR1_NOPAR | COR1_8BITS | COR1_1SB);
1260                 rcout(CD180_COR2, COR2_LLM);
1261                 rcout(CD180_COR3, CD180_NFIFO);
1262                 CCRCMD(unit, chan, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
1263                 CCRCMD(unit, chan, CCR_RCVREN | CCR_XMTREN);
1264                 WAITFORCCR(unit, chan);
1265                 rcout(CD180_MSVR, MSVR_RTS);
1266
1267                 /* Fill TXBUF with test data */
1268                 for (i = 0; i < CD180_NFIFO; i++) {
1269                         tchans[chan].txbuf[i] = ctest[i];
1270                         tchans[chan].rxbuf[i] = 0;
1271                 }
1272                 tchans[chan].txptr = tchans[chan].rxptr = 0;
1273
1274                 /* Now, start transmit */
1275                 rcout(CD180_IER, IER_TxMpty|IER_RxData);
1276         }
1277         /* Pseudo-interrupt poll stuff */
1278         for (rcnt = 10000; rcnt-- > 0; rcnt--) {
1279                 i = ~(rcin(RC_BSR));
1280                 if (i & RC_BSR_TOUT)
1281                         ERR(("BSR timeout bit set\n"))
1282                 else if (i & RC_BSR_TXINT) {
1283                         iack = rcin(RC_PILR_TX);
1284                         if (iack != (GIVR_IT_TDI | chipid))
1285                                 ERR(("Bad TX intr ack (%02x != %02x)\n",
1286                                         iack, GIVR_IT_TDI | chipid));
1287                         chan = (rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH;
1288                         /* If no more data to transmit, disable TX intr */
1289                         if (tchans[chan].txptr >= CD180_NFIFO) {
1290                                 iack = rcin(CD180_IER);
1291                                 rcout(CD180_IER, iack & ~IER_TxMpty);
1292                         } else {
1293                                 for (iack = tchans[chan].txptr;
1294                                     iack < CD180_NFIFO; iack++)
1295                                         rcout(CD180_TDR,
1296                                             tchans[chan].txbuf[iack]);
1297                                 tchans[chan].txptr = iack;
1298                         }
1299                         rcout(CD180_EOIR, 0);
1300                 } else if (i & RC_BSR_RXINT) {
1301                         u_char ucnt;
1302
1303                         iack = rcin(RC_PILR_RX);
1304                         if (iack != (GIVR_IT_RGDI | chipid) &&
1305                             iack != (GIVR_IT_REI  | chipid))
1306                                 ERR(("Bad RX intr ack (%02x != %02x)\n",
1307                                         iack, GIVR_IT_RGDI | chipid))
1308                         chan = (rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH;
1309                         ucnt = rcin(CD180_RDCR) & 0xF;
1310                         while (ucnt-- > 0) {
1311                                 iack = rcin(CD180_RCSR);
1312                                 if (iack & RCSR_Timeout)
1313                                         break;
1314                                 if (iack & 0xF)
1315                                         ERR(("Bad char chan %d (RCSR = %02X)\n",
1316                                             chan, iack))
1317                                 if (tchans[chan].rxptr > CD180_NFIFO)
1318                                         ERR(("Got extra chars chan %d\n",
1319                                             chan))
1320                                 tchans[chan].rxbuf[tchans[chan].rxptr++] =
1321                                         rcin(CD180_RDR);
1322                         }
1323                         rcout(CD180_EOIR, 0);
1324                 }
1325                 rcout(RC_CTOUT, 0);
1326                 for (iack = chan = 0; chan < CD180_NCHAN; chan++)
1327                         if (tchans[chan].rxptr >= CD180_NFIFO)
1328                                 iack++;
1329                 if (iack == CD180_NCHAN)
1330                         break;
1331         }
1332         for (chan = 0; chan < CD180_NCHAN; chan++) {
1333                 /* Select and reset channel */
1334                 rcout(CD180_CAR, chan);
1335                 CCRCMD(unit, chan, CCR_ResetChan);
1336         }
1337
1338         if (!rcnt)
1339                 ERR(("looses characters during local loopback\n"))
1340         /* Now, check data */
1341         for (chan = 0; chan < CD180_NCHAN; chan++)
1342                 for (i = 0; i < CD180_NFIFO; i++)
1343                         if (ctest[i] != tchans[chan].rxbuf[i])
1344                                 ERR(("data mismatch chan %d ptr %d (%d != %d)\n",
1345                                     chan, i, ctest[i], tchans[chan].rxbuf[i]))
1346         (void) splx(old_level);
1347         return 0;
1348 }
1349
1350 #ifdef RCDEBUG
1351 static void printrcflags(rc, comment)
1352 struct rc_chans  *rc;
1353 char             *comment;
1354 {
1355         u_short f = rc->rc_flags;
1356         register int    nec = rc->rc_rcb->rcb_addr;
1357
1358         printf("rc%d/%d: %s flags: %s%s%s%s%s%s%s%s%s%s%s%s\n",
1359                 rc->rc_rcb->rcb_unit, rc->rc_chan, comment,
1360                 (f & RC_DTR_OFF)?"DTR_OFF " :"",
1361                 (f & RC_ACTOUT) ?"ACTOUT " :"",
1362                 (f & RC_RTSFLOW)?"RTSFLOW " :"",
1363                 (f & RC_CTSFLOW)?"CTSFLOW " :"",
1364                 (f & RC_DORXFER)?"DORXFER " :"",
1365                 (f & RC_DOXXFER)?"DOXXFER " :"",
1366                 (f & RC_MODCHG) ?"MODCHG "  :"",
1367                 (f & RC_OSUSP)  ?"OSUSP " :"",
1368                 (f & RC_OSBUSY) ?"OSBUSY " :"",
1369                 (f & RC_WAS_BUFOVFL) ?"BUFOVFL " :"",
1370                 (f & RC_WAS_SILOVFL) ?"SILOVFL " :"",
1371                 (f & RC_SEND_RDY) ?"SEND_RDY":"");
1372
1373         rcout(CD180_CAR, rc->rc_chan);
1374
1375         printf("rc%d/%d: msvr %02x ier %02x ccsr %02x\n",
1376                 rc->rc_rcb->rcb_unit, rc->rc_chan,
1377                 rcin(CD180_MSVR),
1378                 rcin(CD180_IER),
1379                 rcin(CD180_CCSR));
1380 }
1381 #endif /* RCDEBUG */
1382
1383 static void
1384 rc_dtrwakeup(chan)
1385         void    *chan;
1386 {
1387         struct rc_chans  *rc;
1388
1389         rc = (struct rc_chans *)chan;
1390         rc->rc_flags &= ~RC_DTR_OFF;
1391         wakeup(&rc->rc_dtrwait);
1392 }
1393
1394 static void
1395 rc_discard_output(rc)
1396         struct rc_chans  *rc;
1397 {
1398         disable_intr();
1399         if (rc->rc_flags & RC_DOXXFER) {
1400                 rc_scheduled_event -= LOTS_OF_EVENTS;
1401                 rc->rc_flags &= ~RC_DOXXFER;
1402         }
1403         rc->rc_optr = rc->rc_obufend;
1404         rc->rc_tp->t_state &= ~TS_BUSY;
1405         enable_intr();
1406         ttwwakeup(rc->rc_tp);
1407 }
1408
1409 static void
1410 rc_wakeup(chan)
1411         void    *chan;
1412 {
1413         timeout(rc_wakeup, (caddr_t)NULL, 1);
1414
1415         if (rc_scheduled_event != 0) {
1416                 int     s;
1417
1418                 s = splsofttty();
1419                 rcpoll();
1420                 splx(s);
1421         }
1422 }
1423
1424 static void
1425 disc_optim(tp, t, rc)
1426         struct tty      *tp;
1427         struct termios  *t;
1428         struct rc_chans *rc;
1429 {
1430
1431         if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
1432             && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
1433             && (!(t->c_iflag & PARMRK)
1434                 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
1435             && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
1436             && linesw[tp->t_line].l_rint == ttyinput)
1437                 tp->t_state |= TS_CAN_BYPASS_L_RINT;
1438         else
1439                 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
1440         rc->rc_hotchar = linesw[tp->t_line].l_hotchar;
1441 }
1442
1443 static void
1444 rc_wait0(nec, unit, chan, line)
1445         int     nec, unit, chan, line;
1446 {
1447         int rcnt;
1448
1449         for (rcnt = 50; rcnt && rcin(CD180_CCR); rcnt--)
1450                 DELAY(30);
1451         if (rcnt == 0)
1452                 printf("rc%d/%d: channel command timeout, rc.c line: %d\n",
1453                       unit, chan, line);
1454 }