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 1.21 2006/11/07 18:50:06 dillon Exp $
  29  *
  30  */
  31
  32 /*
  33  * SDL Communications Riscom/8 (based on Cirrus Logic CL-CD180) driver
  34  *
  35  */
  36
  37 #include "use_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 <sys/thread2.h>
  51 #include <machine/clock.h>
  52
  53 #include <bus/isa/i386/isa_device.h>
  54
  55 #include <machine_base/isa/ic/cd180.h>
  56 #include "rcreg.h"
  57
  58 /* Prototypes */
  59 static int     rcprobe         (struct isa_device *);
  60 static int     rcattach        (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 dev_ops rc_ops = {
  94         { "rc", CDEV_MAJOR, D_TTY | D_KQFILTER },
  95         .d_open =       rcopen,
  96         .d_close =      rcclose,
  97         .d_read =       ttyread,
  98         .d_write =      ttywrite,
  99         .d_ioctl =      rcioctl,
 100         .d_poll =       ttypoll,
 101         .d_kqfilter =   ttykqfilter
 102 };
 103
 104 /* Per-board structure */
 105 static struct rc_softc {
 106         u_int           rcb_probed;     /* 1 - probed, 2 - attached */
 107         u_int           rcb_addr;       /* Base I/O addr        */
 108         u_int           rcb_unit;       /* unit #               */
 109         u_char          rcb_dtr;        /* DTR status           */
 110         struct rc_chans *rcb_baserc;    /* base rc ptr          */
 111 } rc_softc[NRC];
 112
 113 /* Per-channel structure */
 114 static struct rc_chans  {
 115         struct rc_softc *rc_rcb;                /* back ptr             */
 116         u_short          rc_flags;              /* Misc. flags          */
 117         int              rc_chan;               /* Channel #            */
 118         u_char           rc_ier;                /* intr. enable reg     */
 119         u_char           rc_msvr;               /* modem sig. status    */
 120         u_char           rc_cor2;               /* options reg          */
 121         u_char           rc_pendcmd;            /* special cmd pending  */
 122         u_int            rc_dtrwait;            /* dtr timeout          */
 123         u_int            rc_dcdwaits;           /* how many waits DCD in open */
 124         u_char           rc_hotchar;            /* end packed optimize */
 125         struct tty      *rc_tp;                 /* tty struct           */
 126         u_char          *rc_iptr;               /* Chars input buffer         */
 127         u_char          *rc_hiwat;              /* hi-water mark        */
 128         u_char          *rc_bufend;             /* end of buffer        */
 129         u_char          *rc_optr;               /* ptr in output buf    */
 130         u_char          *rc_obufend;            /* end of output buf    */
 131         struct callout   rc_dtr_ch;
 132         u_char           rc_ibuf[4 * RC_IBUFSIZE];  /* input buffer         */
 133         u_char           rc_obuf[RC_OBUFSIZE];  /* output buffer        */
 134 } rc_chans[NRC * CD180_NCHAN];
 135
 136 static int rc_scheduled_event = 0;
 137 static struct callout rc_wakeup_ch;
 138
 139 /* for pstat -t */
 140 static struct tty rc_tty[NRC * CD180_NCHAN];
 141 static const int  nrc_tty = NRC * CD180_NCHAN;
 142
 143 /* Flags */
 144 #define RC_DTR_OFF      0x0001          /* DTR wait, for close/open     */
 145 #define RC_ACTOUT       0x0002          /* Dial-out port active         */
 146 #define RC_RTSFLOW      0x0004          /* RTS flow ctl enabled         */
 147 #define RC_CTSFLOW      0x0008          /* CTS flow ctl enabled         */
 148 #define RC_DORXFER      0x0010          /* RXFER event planned          */
 149 #define RC_DOXXFER      0x0020          /* XXFER event planned          */
 150 #define RC_MODCHG       0x0040          /* Modem status changed         */
 151 #define RC_OSUSP        0x0080          /* Output suspended             */
 152 #define RC_OSBUSY       0x0100          /* start() routine in progress  */
 153 #define RC_WAS_BUFOVFL  0x0200          /* low-level buffer ovferflow   */
 154 #define RC_WAS_SILOVFL  0x0400          /* silo buffer overflow         */
 155 #define RC_SEND_RDY     0x0800          /* ready to send */
 156
 157 /* Table for translation of RCSR status bits to internal form */
 158 static int rc_rcsrt[16] = {
 159         0,             TTY_OE,               TTY_FE,
 160         TTY_FE|TTY_OE, TTY_PE,               TTY_PE|TTY_OE,
 161         TTY_PE|TTY_FE, TTY_PE|TTY_FE|TTY_OE, TTY_BI,
 162         TTY_BI|TTY_OE, TTY_BI|TTY_FE,        TTY_BI|TTY_FE|TTY_OE,
 163         TTY_BI|TTY_PE, TTY_BI|TTY_PE|TTY_OE, TTY_BI|TTY_PE|TTY_FE,
 164         TTY_BI|TTY_PE|TTY_FE|TTY_OE
 165 };
 166
 167 /* Static prototypes */
 168 static inthand2_t rcintr;
 169 static void rc_hwreset          (int, int, unsigned int);
 170 static int  rc_test             (int, int);
 171 static void rc_discard_output   (struct rc_chans *);
 172 static void rc_hardclose        (struct rc_chans *);
 173 static int  rc_modctl           (struct rc_chans *, int, int);
 174 static void rc_start            (struct tty *);
 175 static void rc_stop              (struct tty *, int rw);
 176 static int  rc_param            (struct tty *, struct termios *);
 177 static inthand2_t rcpoll;
 178 static void rc_reinit           (struct rc_softc *);
 179 #ifdef RCDEBUG
 180 static void printrcflags();
 181 #endif
 182 static timeout_t rc_dtrwakeup;
 183 static timeout_t rc_wakeup;
 184 static void disc_optim          (struct tty     *tp, struct termios *t, struct rc_chans *);
 185 static void rc_wait0            (int nec, int unit, int chan, int line);
 186
 187 /**********************************************/
 188
 189 /* Quick device probing */
 190 static int
 191 rcprobe(dvp)
 192         struct  isa_device      *dvp;
 193 {
 194         int             irq = ffs(dvp->id_irq) - 1;
 195         int    nec = dvp->id_iobase;
 196
 197         if (dvp->id_unit > NRC)
 198                 return 0;
 199         if (!RC_VALIDADDR(nec)) {
 200                 printf("rc%d: illegal base address %x\n", dvp->id_unit, nec);
 201                 return 0;
 202         }
 203         if (!RC_VALIDIRQ(irq)) {
 204                 printf("rc%d: illegal IRQ value %d\n", dvp->id_unit, irq);
 205                 return 0;
 206         }
 207         rcout(CD180_PPRL, 0x22); /* Random values to Prescale reg. */
 208         rcout(CD180_PPRH, 0x11);
 209         if (rcin(CD180_PPRL) != 0x22 || rcin(CD180_PPRH) != 0x11)
 210                 return 0;
 211         /* Now, test the board more thoroughly, with diagnostic */
 212         if (rc_test(nec, dvp->id_unit))
 213                 return 0;
 214         rc_softc[dvp->id_unit].rcb_probed = RC_PROBED;
 215
 216         return 0xF;
 217 }
 218
 219 static int
 220 rcattach(dvp)
 221         struct  isa_device      *dvp;
 222 {
 223         int            chan, nec = dvp->id_iobase;
 224         struct rc_softc         *rcb = &rc_softc[dvp->id_unit];
 225         struct rc_chans         *rc  = &rc_chans[dvp->id_unit * CD180_NCHAN];
 226         static int              rc_started = 0;
 227         struct tty              *tp;
 228
 229         dvp->id_intr = rcintr;
 230
 231         /* Thorooughly test the device */
 232         if (rcb->rcb_probed != RC_PROBED)
 233                 return 0;
 234         rcb->rcb_addr   = nec;
 235         rcb->rcb_dtr    = 0;
 236         rcb->rcb_baserc = rc;
 237         rcb->rcb_unit   = dvp->id_unit;
 238         /*rcb->rcb_chipid = 0x10 + dvp->id_unit;*/
 239         printf("rc%d: %d chans, firmware rev. %c\n", rcb->rcb_unit,
 240                 CD180_NCHAN, (rcin(CD180_GFRCR) & 0xF) + 'A');
 241
 242         for (chan = 0; chan < CD180_NCHAN; chan++, rc++) {
 243                 callout_init(&rc->rc_dtr_ch);
 244                 rc->rc_rcb     = rcb;
 245                 rc->rc_chan    = chan;
 246                 rc->rc_iptr    = rc->rc_ibuf;
 247                 rc->rc_bufend  = &rc->rc_ibuf[RC_IBUFSIZE];
 248                 rc->rc_hiwat   = &rc->rc_ibuf[RC_IHIGHWATER];
 249                 rc->rc_flags   = rc->rc_ier = rc->rc_msvr = 0;
 250                 rc->rc_cor2    = rc->rc_pendcmd = 0;
 251                 rc->rc_optr    = rc->rc_obufend  = rc->rc_obuf;
 252                 rc->rc_dtrwait = 3 * hz;
 253                 rc->rc_dcdwaits= 0;
 254                 rc->rc_hotchar = 0;
 255                 tp = rc->rc_tp = &rc_tty[chan + (dvp->id_unit * CD180_NCHAN)];
 256                 ttychars(tp);
 257                 tp->t_lflag = tp->t_iflag = tp->t_oflag = 0;
 258                 tp->t_cflag = TTYDEF_CFLAG;
 259                 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
 260         }
 261         rcb->rcb_probed = RC_ATTACHED;
 262         if (!rc_started) {
 263                 dev_ops_add(&rc_ops, -1, rcb->rcb_unit);
 264                 register_swi(SWI_TTY, rcpoll, NULL, "rcpoll", NULL);
 265                 callout_init(&rc_wakeup_ch);
 266                 rc_wakeup(NULL);
 267                 rc_started = 1;
 268         }
 269         return 1;
 270 }
 271
 272 /* RC interrupt handling */
 273 static void
 274 rcintr(void *arg, void *frame)
 275 {
 276         int unit = (int)arg;
 277         struct rc_softc        *rcb = &rc_softc[unit];
 278         struct rc_chans        *rc;
 279         int                    nec, resid;
 280         u_char                 val, iack, bsr, ucnt, *optr;
 281         int                             good_data, t_state;
 282
 283         if (rcb->rcb_probed != RC_ATTACHED) {
 284                 printf("rc%d: bogus interrupt\n", unit);
 285                 return;
 286         }
 287         nec = rcb->rcb_addr;
 288
 289         bsr = ~(rcin(RC_BSR));
 290
 291         if (!(bsr & (RC_BSR_TOUT|RC_BSR_RXINT|RC_BSR_TXINT|RC_BSR_MOINT))) {
 292                 printf("rc%d: extra interrupt\n", unit);
 293                 rcout(CD180_EOIR, 0);
 294                 return;
 295         }
 296
 297         while (bsr & (RC_BSR_TOUT|RC_BSR_RXINT|RC_BSR_TXINT|RC_BSR_MOINT)) {
 298 #ifdef RCDEBUG_DETAILED
 299                 printf("rc%d: intr (%02x) %s%s%s%s\n", unit, bsr,
 300                         (bsr & RC_BSR_TOUT)?"TOUT ":"",
 301                         (bsr & RC_BSR_RXINT)?"RXINT ":"",
 302                         (bsr & RC_BSR_TXINT)?"TXINT ":"",
 303                         (bsr & RC_BSR_MOINT)?"MOINT":"");
 304 #endif
 305                 if (bsr & RC_BSR_TOUT) {
 306                         printf("rc%d: hardware failure, reset board\n", unit);
 307                         rcout(RC_CTOUT, 0);
 308                         rc_reinit(rcb);
 309                         return;
 310                 }
 311                 if (bsr & RC_BSR_RXINT) {
 312                         iack = rcin(RC_PILR_RX);
 313                         good_data = (iack == (GIVR_IT_RGDI | RC_FAKEID));
 314                         if (!good_data && iack != (GIVR_IT_REI | RC_FAKEID)) {
 315                                 printf("rc%d: fake rxint: %02x\n", unit, iack);
 316                                 goto more_intrs;
 317                         }
 318                         rc = rcb->rcb_baserc + ((rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH);
 319                         t_state = rc->rc_tp->t_state;
 320                         /* Do RTS flow control stuff */
 321                         if (  (rc->rc_flags & RC_RTSFLOW)
 322                             || !(t_state & TS_ISOPEN)
 323                            ) {
 324                                 if (  (   !(t_state & TS_ISOPEN)
 325                                        || (t_state & TS_TBLOCK)
 326                                       )
 327                                     && (rc->rc_msvr & MSVR_RTS)
 328                                    )
 329                                         rcout(CD180_MSVR,
 330                                                 rc->rc_msvr &= ~MSVR_RTS);
 331                                 else if (!(rc->rc_msvr & MSVR_RTS))
 332                                         rcout(CD180_MSVR,
 333                                                 rc->rc_msvr |= MSVR_RTS);
 334                         }
 335                         ucnt  = rcin(CD180_RDCR) & 0xF;
 336                         resid = 0;
 337
 338                         if (t_state & TS_ISOPEN) {
 339                                 /* check for input buffer overflow */
 340                                 if ((rc->rc_iptr + ucnt) >= rc->rc_bufend) {
 341                                         resid  = ucnt;
 342                                         ucnt   = rc->rc_bufend - rc->rc_iptr;
 343                                         resid -= ucnt;
 344                                         if (!(rc->rc_flags & RC_WAS_BUFOVFL)) {
 345                                                 rc->rc_flags |= RC_WAS_BUFOVFL;
 346                                                 rc_scheduled_event++;
 347                                         }
 348                                 }
 349                                 optr = rc->rc_iptr;
 350                                 /* check foor good data */
 351                                 if (good_data) {
 352                                         while (ucnt-- > 0) {
 353                                                 val = rcin(CD180_RDR);
 354                                                 optr[0] = val;
 355                                                 optr[INPUT_FLAGS_SHIFT] = 0;
 356                                                 optr++;
 357                                                 rc_scheduled_event++;
 358                                                 if (val != 0 && val == rc->rc_hotchar)
 359                                                         setsofttty();
 360                                         }
 361                                 } else {
 362                                         /* Store also status data */
 363                                         while (ucnt-- > 0) {
 364                                                 iack = rcin(CD180_RCSR);
 365                                                 if (iack & RCSR_Timeout)
 366                                                         break;
 367                                                 if (   (iack & RCSR_OE)
 368                                                     && !(rc->rc_flags & RC_WAS_SILOVFL)) {
 369                                                         rc->rc_flags |= RC_WAS_SILOVFL;
 370                                                         rc_scheduled_event++;
 371                                                 }
 372                                                 val = rcin(CD180_RDR);
 373                                                 /*
 374                                                   Don't store PE if IGNPAR and BREAK if IGNBRK,
 375                                                   this hack allows "raw" tty optimization
 376                                                   works even if IGN* is set.
 377                                                 */
 378                                                 if (   !(iack & (RCSR_PE|RCSR_FE|RCSR_Break))
 379                                                     || ((!(iack & (RCSR_PE|RCSR_FE))
 380                                                     ||  !(rc->rc_tp->t_iflag & IGNPAR))
 381                                                     && (!(iack & RCSR_Break)
 382                                                     ||  !(rc->rc_tp->t_iflag & IGNBRK)))) {
 383                                                         if (   (iack & (RCSR_PE|RCSR_FE))
 384                                                             && (t_state & TS_CAN_BYPASS_L_RINT)
 385                                                             && ((iack & RCSR_FE)
 386                                                             ||  ((iack & RCSR_PE)
 387                                                             &&  (rc->rc_tp->t_iflag & INPCK))))
 388                                                                 val = 0;
 389                                                         else if (val != 0 && val == rc->rc_hotchar)
 390                                                                 setsofttty();
 391                                                         optr[0] = val;
 392                                                         optr[INPUT_FLAGS_SHIFT] = iack;
 393                                                         optr++;
 394                                                         rc_scheduled_event++;
 395                                                 }
 396                                         }
 397                                 }
 398                                 rc->rc_iptr = optr;
 399                                 rc->rc_flags |= RC_DORXFER;
 400                         } else
 401                                 resid = ucnt;
 402                         /* Clear FIFO if necessary */
 403                         while (resid-- > 0) {
 404                                 if (!good_data)
 405                                         iack = rcin(CD180_RCSR);
 406                                 else
 407                                         iack = 0;
 408                                 if (iack & RCSR_Timeout)
 409                                         break;
 410                                 (void) rcin(CD180_RDR);
 411                         }
 412                         goto more_intrs;
 413                 }
 414                 if (bsr & RC_BSR_MOINT) {
 415                         iack = rcin(RC_PILR_MODEM);
 416                         if (iack != (GIVR_IT_MSCI | RC_FAKEID)) {
 417                                 printf("rc%d: fake moint: %02x\n", unit, iack);
 418                                 goto more_intrs;
 419                         }
 420                         rc = rcb->rcb_baserc + ((rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH);
 421                         iack = rcin(CD180_MCR);
 422                         rc->rc_msvr = rcin(CD180_MSVR);
 423                         rcout(CD180_MCR, 0);
 424 #ifdef RCDEBUG
 425                         printrcflags(rc, "moint");
 426 #endif
 427                         if (rc->rc_flags & RC_CTSFLOW) {
 428                                 if (rc->rc_msvr & MSVR_CTS)
 429                                         rc->rc_flags |= RC_SEND_RDY;
 430                                 else
 431                                         rc->rc_flags &= ~RC_SEND_RDY;
 432                         } else
 433                                 rc->rc_flags |= RC_SEND_RDY;
 434                         if ((iack & MCR_CDchg) && !(rc->rc_flags & RC_MODCHG)) {
 435                                 rc_scheduled_event += LOTS_OF_EVENTS;
 436                                 rc->rc_flags |= RC_MODCHG;
 437                                 setsofttty();
 438                         }
 439                         goto more_intrs;
 440                 }
 441                 if (bsr & RC_BSR_TXINT) {
 442                         iack = rcin(RC_PILR_TX);
 443                         if (iack != (GIVR_IT_TDI | RC_FAKEID)) {
 444                                 printf("rc%d: fake txint: %02x\n", unit, iack);
 445                                 goto more_intrs;
 446                         }
 447                         rc = rcb->rcb_baserc + ((rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH);
 448                         if (    (rc->rc_flags & RC_OSUSP)
 449                             || !(rc->rc_flags & RC_SEND_RDY)
 450                            )
 451                                 goto more_intrs;
 452                         /* Handle breaks and other stuff */
 453                         if (rc->rc_pendcmd) {
 454                                 rcout(CD180_COR2, rc->rc_cor2 |= COR2_ETC);
 455                                 rcout(CD180_TDR,  CD180_C_ESC);
 456                                 rcout(CD180_TDR,  rc->rc_pendcmd);
 457                                 rcout(CD180_COR2, rc->rc_cor2 &= ~COR2_ETC);
 458                                 rc->rc_pendcmd = 0;
 459                                 goto more_intrs;
 460                         }
 461                         optr = rc->rc_optr;
 462                         resid = rc->rc_obufend - optr;
 463                         if (resid > CD180_NFIFO)
 464                                 resid = CD180_NFIFO;
 465                         while (resid-- > 0)
 466                                 rcout(CD180_TDR, *optr++);
 467                         rc->rc_optr = optr;
 468
 469                         /* output completed? */
 470                         if (optr >= rc->rc_obufend) {
 471                                 rcout(CD180_IER, rc->rc_ier &= ~IER_TxRdy);
 472 #ifdef RCDEBUG
 473                                 printf("rc%d/%d: output completed\n", unit, rc->rc_chan);
 474 #endif
 475                                 if (!(rc->rc_flags & RC_DOXXFER)) {
 476                                         rc_scheduled_event += LOTS_OF_EVENTS;
 477                                         rc->rc_flags |= RC_DOXXFER;
 478                                         setsofttty();
 479                                 }
 480                         }
 481                 }
 482         more_intrs:
 483                 rcout(CD180_EOIR, 0);   /* end of interrupt */
 484                 rcout(RC_CTOUT, 0);
 485                 bsr = ~(rcin(RC_BSR));
 486         }
 487 }
 488
 489 /* Feed characters to output buffer */
 490 static void rc_start(tp)
 491 struct tty *tp;
 492 {
 493         struct rc_chans       *rc = &rc_chans[GET_UNIT(tp->t_dev)];
 494         int                    nec = rc->rc_rcb->rcb_addr;
 495
 496         if (rc->rc_flags & RC_OSBUSY)
 497                 return;
 498         crit_enter();
 499         rc->rc_flags |= RC_OSBUSY;
 500         cpu_disable_intr();
 501         if (tp->t_state & TS_TTSTOP)
 502                 rc->rc_flags |= RC_OSUSP;
 503         else
 504                 rc->rc_flags &= ~RC_OSUSP;
 505         /* Do RTS flow control stuff */
 506         if (   (rc->rc_flags & RC_RTSFLOW)
 507             && (tp->t_state & TS_TBLOCK)
 508             && (rc->rc_msvr & MSVR_RTS)
 509            ) {
 510                 rcout(CD180_CAR, rc->rc_chan);
 511                 rcout(CD180_MSVR, rc->rc_msvr &= ~MSVR_RTS);
 512         } else if (!(rc->rc_msvr & MSVR_RTS)) {
 513                 rcout(CD180_CAR, rc->rc_chan);
 514                 rcout(CD180_MSVR, rc->rc_msvr |= MSVR_RTS);
 515         }
 516         cpu_enable_intr();
 517         if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP))
 518                 goto out;
 519 #ifdef RCDEBUG
 520         printrcflags(rc, "rcstart");
 521 #endif
 522         ttwwakeup(tp);
 523 #ifdef RCDEBUG
 524         printf("rcstart: outq = %d obuf = %d\n",
 525                 tp->t_outq.c_cc, rc->rc_obufend - rc->rc_optr);
 526 #endif
 527         if (tp->t_state & TS_BUSY)
 528                 goto    out;    /* output still in progress ... */
 529
 530         if (tp->t_outq.c_cc > 0) {
 531                 u_int   ocnt;
 532
 533                 tp->t_state |= TS_BUSY;
 534                 ocnt = q_to_b(&tp->t_outq, rc->rc_obuf, sizeof rc->rc_obuf);
 535                 cpu_disable_intr();
 536                 rc->rc_optr = rc->rc_obuf;
 537                 rc->rc_obufend = rc->rc_optr + ocnt;
 538                 cpu_enable_intr();
 539                 if (!(rc->rc_ier & IER_TxRdy)) {
 540 #ifdef RCDEBUG
 541                         printf("rc%d/%d: rcstart enable txint\n", rc->rc_rcb->rcb_unit, rc->rc_chan);
 542 #endif
 543                         rcout(CD180_CAR, rc->rc_chan);
 544                         rcout(CD180_IER, rc->rc_ier |= IER_TxRdy);
 545                 }
 546         }
 547 out:
 548         rc->rc_flags &= ~RC_OSBUSY;
 549         crit_exit();
 550 }
 551
 552 /* Handle delayed events. */
 553 void
 554 rcpoll(void *dummy, void *frame)
 555 {
 556         struct rc_chans *rc;
 557         struct rc_softc *rcb;
 558         u_char        *tptr, *eptr;
 559         struct tty    *tp;
 560         int            chan, icnt, nec, unit;
 561
 562         if (rc_scheduled_event == 0)
 563                 return;
 564 repeat:
 565         for (unit = 0; unit < NRC; unit++) {
 566                 rcb = &rc_softc[unit];
 567                 rc = rcb->rcb_baserc;
 568                 nec = rc->rc_rcb->rcb_addr;
 569                 for (chan = 0; chan < CD180_NCHAN; rc++, chan++) {
 570                         tp = rc->rc_tp;
 571 #ifdef RCDEBUG
 572                         if (rc->rc_flags & (RC_DORXFER|RC_DOXXFER|RC_MODCHG|
 573                             RC_WAS_BUFOVFL|RC_WAS_SILOVFL))
 574                                 printrcflags(rc, "rcevent");
 575 #endif
 576                         if (rc->rc_flags & RC_WAS_BUFOVFL) {
 577                                 cpu_disable_intr();
 578                                 rc->rc_flags &= ~RC_WAS_BUFOVFL;
 579                                 rc_scheduled_event--;
 580                                 cpu_enable_intr();
 581                                 printf("rc%d/%d: interrupt-level buffer overflow\n",
 582                                         unit, chan);
 583                         }
 584                         if (rc->rc_flags & RC_WAS_SILOVFL) {
 585                                 cpu_disable_intr();
 586                                 rc->rc_flags &= ~RC_WAS_SILOVFL;
 587                                 rc_scheduled_event--;
 588                                 cpu_enable_intr();
 589                                 printf("rc%d/%d: silo overflow\n",
 590                                         unit, chan);
 591                         }
 592                         if (rc->rc_flags & RC_MODCHG) {
 593                                 cpu_disable_intr();
 594                                 rc->rc_flags &= ~RC_MODCHG;
 595                                 rc_scheduled_event -= LOTS_OF_EVENTS;
 596                                 cpu_enable_intr();
 597                                 (*linesw[tp->t_line].l_modem)(tp, !!(rc->rc_msvr & MSVR_CD));
 598                         }
 599                         if (rc->rc_flags & RC_DORXFER) {
 600                                 cpu_disable_intr();
 601                                 rc->rc_flags &= ~RC_DORXFER;
 602                                 eptr = rc->rc_iptr;
 603                                 if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE])
 604                                         tptr = &rc->rc_ibuf[RC_IBUFSIZE];
 605                                 else
 606                                         tptr = rc->rc_ibuf;
 607                                 icnt = eptr - tptr;
 608                                 if (icnt > 0) {
 609                                         if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE]) {
 610                                                 rc->rc_iptr   = rc->rc_ibuf;
 611                                                 rc->rc_bufend = &rc->rc_ibuf[RC_IBUFSIZE];
 612                                                 rc->rc_hiwat  = &rc->rc_ibuf[RC_IHIGHWATER];
 613                                         } else {
 614                                                 rc->rc_iptr   = &rc->rc_ibuf[RC_IBUFSIZE];
 615                                                 rc->rc_bufend = &rc->rc_ibuf[2 * RC_IBUFSIZE];
 616                                                 rc->rc_hiwat  =
 617                                                         &rc->rc_ibuf[RC_IBUFSIZE + RC_IHIGHWATER];
 618                                         }
 619                                         if (   (rc->rc_flags & RC_RTSFLOW)
 620                                             && (tp->t_state & TS_ISOPEN)
 621                                             && !(tp->t_state & TS_TBLOCK)
 622                                             && !(rc->rc_msvr & MSVR_RTS)
 623                                             ) {
 624                                                 rcout(CD180_CAR, chan);
 625                                                 rcout(CD180_MSVR,
 626                                                         rc->rc_msvr |= MSVR_RTS);
 627                                         }
 628                                         rc_scheduled_event -= icnt;
 629                                 }
 630                                 cpu_enable_intr();
 631
 632                                 if (icnt <= 0 || !(tp->t_state & TS_ISOPEN))
 633                                         goto done1;
 634
 635                                 if (   (tp->t_state & TS_CAN_BYPASS_L_RINT)
 636                                     && !(tp->t_state & TS_LOCAL)) {
 637                                         if ((tp->t_rawq.c_cc + icnt) >= RB_I_HIGH_WATER
 638                                             && ((rc->rc_flags & RC_RTSFLOW) || (tp->t_iflag & IXOFF))
 639                                             && !(tp->t_state & TS_TBLOCK))
 640                                                 ttyblock(tp);
 641                                         tk_nin += icnt;
 642                                         tk_rawcc += icnt;
 643                                         tp->t_rawcc += icnt;
 644                                         if (b_to_q(tptr, icnt, &tp->t_rawq))
 645                                                 printf("rc%d/%d: tty-level buffer overflow\n",
 646                                                         unit, chan);
 647                                         ttwakeup(tp);
 648                                         if ((tp->t_state & TS_TTSTOP) && ((tp->t_iflag & IXANY)
 649                                             || (tp->t_cc[VSTART] == tp->t_cc[VSTOP]))) {
 650                                                 tp->t_state &= ~TS_TTSTOP;
 651                                                 tp->t_lflag &= ~FLUSHO;
 652                                                 rc_start(tp);
 653                                         }
 654                                 } else {
 655                                         for (; tptr < eptr; tptr++)
 656                                                 (*linesw[tp->t_line].l_rint)
 657                                                     (tptr[0] |
 658                                                     rc_rcsrt[tptr[INPUT_FLAGS_SHIFT] & 0xF], tp);
 659                                 }
 660 done1: ;
 661                         }
 662                         if (rc->rc_flags & RC_DOXXFER) {
 663                                 cpu_disable_intr();
 664                                 rc_scheduled_event -= LOTS_OF_EVENTS;
 665                                 rc->rc_flags &= ~RC_DOXXFER;
 666                                 rc->rc_tp->t_state &= ~TS_BUSY;
 667                                 cpu_enable_intr();
 668                                 (*linesw[tp->t_line].l_start)(tp);
 669                         }
 670                 }
 671                 if (rc_scheduled_event == 0)
 672                         break;
 673         }
 674         if (rc_scheduled_event >= LOTS_OF_EVENTS)
 675                 goto repeat;
 676 }
 677
 678 static  void
 679 rc_stop(tp, rw)
 680         struct tty     *tp;
 681         int                     rw;
 682 {
 683         struct rc_chans        *rc = &rc_chans[GET_UNIT(tp->t_dev)];
 684         u_char *tptr, *eptr;
 685
 686 #ifdef RCDEBUG
 687         printf("rc%d/%d: rc_stop %s%s\n", rc->rc_rcb->rcb_unit, rc->rc_chan,
 688                 (rw & FWRITE)?"FWRITE ":"", (rw & FREAD)?"FREAD":"");
 689 #endif
 690         if (rw & FWRITE)
 691                 rc_discard_output(rc);
 692         cpu_disable_intr();
 693         if (rw & FREAD) {
 694                 rc->rc_flags &= ~RC_DORXFER;
 695                 eptr = rc->rc_iptr;
 696                 if (rc->rc_bufend == &rc->rc_ibuf[2 * RC_IBUFSIZE]) {
 697                         tptr = &rc->rc_ibuf[RC_IBUFSIZE];
 698                         rc->rc_iptr = &rc->rc_ibuf[RC_IBUFSIZE];
 699                 } else {
 700                         tptr = rc->rc_ibuf;
 701                         rc->rc_iptr = rc->rc_ibuf;
 702                 }
 703                 rc_scheduled_event -= eptr - tptr;
 704         }
 705         if (tp->t_state & TS_TTSTOP)
 706                 rc->rc_flags |= RC_OSUSP;
 707         else
 708                 rc->rc_flags &= ~RC_OSUSP;
 709         cpu_enable_intr();
 710 }
 711
 712 static  int
 713 rcopen(struct dev_open_args *ap)
 714 {
 715         cdev_t dev = ap->a_head.a_dev;
 716         struct rc_chans *rc;
 717         struct tty      *tp;
 718         int             unit, nec, error = 0;
 719
 720         unit = GET_UNIT(dev);
 721         if (unit >= NRC * CD180_NCHAN)
 722                 return ENXIO;
 723         if (rc_softc[unit / CD180_NCHAN].rcb_probed != RC_ATTACHED)
 724                 return ENXIO;
 725         rc  = &rc_chans[unit];
 726         tp  = rc->rc_tp;
 727         dev->si_tty = tp;
 728         nec = rc->rc_rcb->rcb_addr;
 729 #ifdef RCDEBUG
 730         printf("rc%d/%d: rcopen: dev %x\n", rc->rc_rcb->rcb_unit, unit, dev);
 731 #endif
 732         crit_enter();
 733
 734 again:
 735         while (rc->rc_flags & RC_DTR_OFF) {
 736                 error = tsleep(&(rc->rc_dtrwait), PCATCH, "rcdtr", 0);
 737                 if (error != 0)
 738                         goto out;
 739         }
 740         if (tp->t_state & TS_ISOPEN) {
 741                 if (CALLOUT(dev)) {
 742                         if (!(rc->rc_flags & RC_ACTOUT)) {
 743                                 error = EBUSY;
 744                                 goto out;
 745                         }
 746                 } else {
 747                         if (rc->rc_flags & RC_ACTOUT) {
 748                                 if (ap->a_oflags & O_NONBLOCK) {
 749                                         error = EBUSY;
 750                                         goto out;
 751                                 }
 752                                 error = tsleep(&rc->rc_rcb, PCATCH, "rcbi", 0);
 753                                 if (error)
 754                                         goto out;
 755                                 goto again;
 756                         }
 757                 }
 758                 if (tp->t_state & TS_XCLUDE &&
 759                     suser_cred(ap->a_cred, 0)) {
 760                         error = EBUSY;
 761                         goto out;
 762                 }
 763         } else {
 764                 tp->t_oproc   = rc_start;
 765                 tp->t_param   = rc_param;
 766                 tp->t_stop    = rc_stop;
 767                 tp->t_dev     = dev;
 768
 769                 if (CALLOUT(dev))
 770                         tp->t_cflag |= CLOCAL;
 771                 else
 772                         tp->t_cflag &= ~CLOCAL;
 773
 774                 error = rc_param(tp, &tp->t_termios);
 775                 if (error)
 776                         goto out;
 777                 (void) rc_modctl(rc, TIOCM_RTS|TIOCM_DTR, DMSET);
 778
 779                 if ((rc->rc_msvr & MSVR_CD) || CALLOUT(dev))
 780                         (*linesw[tp->t_line].l_modem)(tp, 1);
 781         }
 782         if (!(tp->t_state & TS_CARR_ON) && !CALLOUT(dev)
 783             && !(tp->t_cflag & CLOCAL) && !(ap->a_oflags & O_NONBLOCK)) {
 784                 rc->rc_dcdwaits++;
 785                 error = tsleep(TSA_CARR_ON(tp), PCATCH, "rcdcd", 0);
 786                 rc->rc_dcdwaits--;
 787                 if (error != 0)
 788                         goto out;
 789                 goto again;
 790         }
 791         error = (*linesw[tp->t_line].l_open)(dev, tp);
 792         disc_optim(tp, &tp->t_termios, rc);
 793         if ((tp->t_state & TS_ISOPEN) && CALLOUT(dev))
 794                 rc->rc_flags |= RC_ACTOUT;
 795 out:
 796         crit_exit();
 797
 798         if(rc->rc_dcdwaits == 0 && !(tp->t_state & TS_ISOPEN))
 799                 rc_hardclose(rc);
 800
 801         return error;
 802 }
 803
 804 static  int
 805 rcclose(struct dev_close_args *ap)
 806 {
 807         cdev_t dev = ap->a_head.a_dev;
 808         struct rc_chans *rc;
 809         struct tty      *tp;
 810         int unit = GET_UNIT(dev);
 811
 812         if (unit >= NRC * CD180_NCHAN)
 813                 return ENXIO;
 814         rc  = &rc_chans[unit];
 815         tp  = rc->rc_tp;
 816 #ifdef RCDEBUG
 817         printf("rc%d/%d: rcclose dev %x\n", rc->rc_rcb->rcb_unit, unit, dev);
 818 #endif
 819         crit_enter();
 820         (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
 821         disc_optim(tp, &tp->t_termios, rc);
 822         rc_stop(tp, FREAD | FWRITE);
 823         rc_hardclose(rc);
 824         ttyclose(tp);
 825         crit_exit();
 826         return 0;
 827 }
 828
 829 static void rc_hardclose(rc)
 830 struct rc_chans *rc;
 831 {
 832         int nec = rc->rc_rcb->rcb_addr;
 833         struct tty *tp = rc->rc_tp;
 834
 835         crit_enter();
 836         rcout(CD180_CAR, rc->rc_chan);
 837
 838         /* Disable rx/tx intrs */
 839         rcout(CD180_IER, rc->rc_ier = 0);
 840         if (   (tp->t_cflag & HUPCL)
 841             || (!(rc->rc_flags & RC_ACTOUT)
 842                && !(rc->rc_msvr & MSVR_CD)
 843                && !(tp->t_cflag & CLOCAL))
 844             || !(tp->t_state & TS_ISOPEN)
 845            ) {
 846                 CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan, CCR_ResetChan);
 847                 WAITFORCCR(rc->rc_rcb->rcb_unit, rc->rc_chan);
 848                 (void) rc_modctl(rc, TIOCM_RTS, DMSET);
 849                 if (rc->rc_dtrwait) {
 850                         callout_reset(&rc->rc_dtr_ch, rc->rc_dtrwait,
 851                                 rc_dtrwakeup, rc);
 852                         rc->rc_flags |= RC_DTR_OFF;
 853                 }
 854         }
 855         rc->rc_flags &= ~RC_ACTOUT;
 856         wakeup((caddr_t) &rc->rc_rcb);  /* wake bi */
 857         wakeup(TSA_CARR_ON(tp));
 858         crit_exit();
 859 }
 860
 861 /* Reset the bastard */
 862 static void rc_hwreset(unit, nec, chipid)
 863         int    unit, nec;
 864         unsigned int    chipid;
 865 {
 866         CCRCMD(unit, -1, CCR_HWRESET);            /* Hardware reset */
 867         DELAY(20000);
 868         WAITFORCCR(unit, -1);
 869
 870         rcout(RC_CTOUT, 0);             /* Clear timeout  */
 871         rcout(CD180_GIVR,  chipid);
 872         rcout(CD180_GICR,  0);
 873
 874         /* Set Prescaler Registers (1 msec) */
 875         rcout(CD180_PPRL, ((RC_OSCFREQ + 999) / 1000) & 0xFF);
 876         rcout(CD180_PPRH, ((RC_OSCFREQ + 999) / 1000) >> 8);
 877
 878         /* Initialize Priority Interrupt Level Registers */
 879         rcout(CD180_PILR1, RC_PILR_MODEM);
 880         rcout(CD180_PILR2, RC_PILR_TX);
 881         rcout(CD180_PILR3, RC_PILR_RX);
 882
 883         /* Reset DTR */
 884         rcout(RC_DTREG, ~0);
 885 }
 886
 887 /* Set channel parameters */
 888 static int rc_param(tp, ts)
 889         struct  tty    *tp;
 890         struct termios          *ts;
 891 {
 892         struct rc_chans *rc = &rc_chans[GET_UNIT(tp->t_dev)];
 893         int    nec = rc->rc_rcb->rcb_addr;
 894         int      idivs, odivs, val, cflag, iflag, lflag, inpflow;
 895
 896         if (   ts->c_ospeed < 0 || ts->c_ospeed > 76800
 897             || ts->c_ispeed < 0 || ts->c_ispeed > 76800
 898            )
 899                 return (EINVAL);
 900         if (ts->c_ispeed == 0)
 901                 ts->c_ispeed = ts->c_ospeed;
 902         odivs = RC_BRD(ts->c_ospeed);
 903         idivs = RC_BRD(ts->c_ispeed);
 904
 905         crit_enter();
 906
 907         /* Select channel */
 908         rcout(CD180_CAR, rc->rc_chan);
 909
 910         /* If speed == 0, hangup line */
 911         if (ts->c_ospeed == 0) {
 912                 CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan, CCR_ResetChan);
 913                 WAITFORCCR(rc->rc_rcb->rcb_unit, rc->rc_chan);
 914                 (void) rc_modctl(rc, TIOCM_DTR, DMBIC);
 915         }
 916
 917         tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
 918         cflag = ts->c_cflag;
 919         iflag = ts->c_iflag;
 920         lflag = ts->c_lflag;
 921
 922         if (idivs > 0) {
 923                 rcout(CD180_RBPRL, idivs & 0xFF);
 924                 rcout(CD180_RBPRH, idivs >> 8);
 925         }
 926         if (odivs > 0) {
 927                 rcout(CD180_TBPRL, odivs & 0xFF);
 928                 rcout(CD180_TBPRH, odivs >> 8);
 929         }
 930
 931         /* set timeout value */
 932         if (ts->c_ispeed > 0) {
 933                 int itm = ts->c_ispeed > 2400 ? 5 : 10000 / ts->c_ispeed + 1;
 934
 935                 if (   !(lflag & ICANON)
 936                     && ts->c_cc[VMIN] != 0 && ts->c_cc[VTIME] != 0
 937                     && ts->c_cc[VTIME] * 10 > itm)
 938                         itm = ts->c_cc[VTIME] * 10;
 939
 940                 rcout(CD180_RTPR, itm <= 255 ? itm : 255);
 941         }
 942
 943         switch (cflag & CSIZE) {
 944                 case CS5:       val = COR1_5BITS;      break;
 945                 case CS6:       val = COR1_6BITS;      break;
 946                 case CS7:       val = COR1_7BITS;      break;
 947                 default:
 948                 case CS8:       val = COR1_8BITS;      break;
 949         }
 950         if (cflag & PARENB) {
 951                 val |= COR1_NORMPAR;
 952                 if (cflag & PARODD)
 953                         val |= COR1_ODDP;
 954                 if (!(cflag & INPCK))
 955                         val |= COR1_Ignore;
 956         } else
 957                 val |= COR1_Ignore;
 958         if (cflag & CSTOPB)
 959                 val |= COR1_2SB;
 960         rcout(CD180_COR1, val);
 961
 962         /* Set FIFO threshold */
 963         val = ts->c_ospeed <= 4800 ? 1 : CD180_NFIFO / 2;
 964         inpflow = 0;
 965         if (   (iflag & IXOFF)
 966             && (   ts->c_cc[VSTOP] != _POSIX_VDISABLE
 967                 && (   ts->c_cc[VSTART] != _POSIX_VDISABLE
 968                     || (iflag & IXANY)
 969                    )
 970                )
 971            ) {
 972                 inpflow = 1;
 973                 val |= COR3_SCDE|COR3_FCT;
 974         }
 975         rcout(CD180_COR3, val);
 976
 977         /* Initialize on-chip automatic flow control */
 978         val = 0;
 979         rc->rc_flags &= ~(RC_CTSFLOW|RC_SEND_RDY);
 980         if (cflag & CCTS_OFLOW) {
 981                 rc->rc_flags |= RC_CTSFLOW;
 982                 val |= COR2_CtsAE;
 983         } else
 984                 rc->rc_flags |= RC_SEND_RDY;
 985         if (tp->t_state & TS_TTSTOP)
 986                 rc->rc_flags |= RC_OSUSP;
 987         else
 988                 rc->rc_flags &= ~RC_OSUSP;
 989         if (cflag & CRTS_IFLOW)
 990                 rc->rc_flags |= RC_RTSFLOW;
 991         else
 992                 rc->rc_flags &= ~RC_RTSFLOW;
 993
 994         if (inpflow) {
 995                 if (ts->c_cc[VSTART] != _POSIX_VDISABLE)
 996                         rcout(CD180_SCHR1, ts->c_cc[VSTART]);
 997                 rcout(CD180_SCHR2, ts->c_cc[VSTOP]);
 998                 val |= COR2_TxIBE;
 999                 if (iflag & IXANY)
1000                         val |= COR2_IXM;
1001         }
1002
1003         rcout(CD180_COR2, rc->rc_cor2 = val);
1004
1005         CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan,
1006                 CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
1007
1008         disc_optim(tp, ts, rc);
1009
1010         /* modem ctl */
1011         val = cflag & CLOCAL ? 0 : MCOR1_CDzd;
1012         if (cflag & CCTS_OFLOW)
1013                 val |= MCOR1_CTSzd;
1014         rcout(CD180_MCOR1, val);
1015
1016         val = cflag & CLOCAL ? 0 : MCOR2_CDod;
1017         if (cflag & CCTS_OFLOW)
1018                 val |= MCOR2_CTSod;
1019         rcout(CD180_MCOR2, val);
1020
1021         /* enable i/o and interrupts */
1022         CCRCMD(rc->rc_rcb->rcb_unit, rc->rc_chan,
1023                 CCR_XMTREN | ((cflag & CREAD) ? CCR_RCVREN : CCR_RCVRDIS));
1024         WAITFORCCR(rc->rc_rcb->rcb_unit, rc->rc_chan);
1025
1026         rc->rc_ier = cflag & CLOCAL ? 0 : IER_CD;
1027         if (cflag & CCTS_OFLOW)
1028                 rc->rc_ier |= IER_CTS;
1029         if (cflag & CREAD)
1030                 rc->rc_ier |= IER_RxData;
1031         if (tp->t_state & TS_BUSY)
1032                 rc->rc_ier |= IER_TxRdy;
1033         if (ts->c_ospeed != 0)
1034                 rc_modctl(rc, TIOCM_DTR, DMBIS);
1035         if ((cflag & CCTS_OFLOW) && (rc->rc_msvr & MSVR_CTS))
1036                 rc->rc_flags |= RC_SEND_RDY;
1037         rcout(CD180_IER, rc->rc_ier);
1038         crit_exit();
1039         return 0;
1040 }
1041
1042 /* Re-initialize board after bogus interrupts */
1043 static void rc_reinit(rcb)
1044 struct rc_softc         *rcb;
1045 {
1046         struct rc_chans       *rc, *rce;
1047         int                    nec;
1048
1049         nec = rcb->rcb_addr;
1050         rc_hwreset(rcb->rcb_unit, nec, RC_FAKEID);
1051         rc  = &rc_chans[rcb->rcb_unit * CD180_NCHAN];
1052         rce = rc + CD180_NCHAN;
1053         for (; rc < rce; rc++)
1054                 (void) rc_param(rc->rc_tp, &rc->rc_tp->t_termios);
1055 }
1056
1057 static  int
1058 rcioctl(struct dev_ioctl_args *ap)
1059 {
1060         cdev_t dev = ap->a_head.a_dev;
1061         struct rc_chans       *rc = &rc_chans[GET_UNIT(dev)];
1062         int                   error;
1063         struct tty                     *tp = rc->rc_tp;
1064
1065         error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
1066                                               ap->a_fflag, ap->a_cred);
1067         if (error != ENOIOCTL)
1068                 return (error);
1069         error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
1070         disc_optim(tp, &tp->t_termios, rc);
1071         if (error != ENOIOCTL)
1072                 return (error);
1073         crit_enter();
1074
1075         switch (ap->a_cmd) {
1076             case TIOCSBRK:
1077                 rc->rc_pendcmd = CD180_C_SBRK;
1078                 break;
1079
1080             case TIOCCBRK:
1081                 rc->rc_pendcmd = CD180_C_EBRK;
1082                 break;
1083
1084             case TIOCSDTR:
1085                 (void) rc_modctl(rc, TIOCM_DTR, DMBIS);
1086                 break;
1087
1088             case TIOCCDTR:
1089                 (void) rc_modctl(rc, TIOCM_DTR, DMBIC);
1090                 break;
1091
1092             case TIOCMGET:
1093                 *(int *) ap->a_data = rc_modctl(rc, 0, DMGET);
1094                 break;
1095
1096             case TIOCMSET:
1097                 (void) rc_modctl(rc, *(int *) ap->a_data, DMSET);
1098                 break;
1099
1100             case TIOCMBIC:
1101                 (void) rc_modctl(rc, *(int *) ap->a_data, DMBIC);
1102                 break;
1103
1104             case TIOCMBIS:
1105                 (void) rc_modctl(rc, *(int *) ap->a_data, DMBIS);
1106                 break;
1107
1108             case TIOCMSDTRWAIT:
1109                 error = suser_cred(ap->a_cred, 0);
1110                 if (error != 0) {
1111                         crit_exit();
1112                         return (error);
1113                 }
1114                 rc->rc_dtrwait = *(int *)ap->a_data * hz / 100;
1115                 break;
1116
1117             case TIOCMGDTRWAIT:
1118                 *(int *)ap->a_data = rc->rc_dtrwait * 100 / hz;
1119                 break;
1120
1121             default:
1122                 crit_exit();
1123                 return ENOTTY;
1124         }
1125         crit_exit();
1126         return 0;
1127 }
1128
1129
1130 /* Modem control routines */
1131
1132 static int rc_modctl(rc, bits, cmd)
1133 struct rc_chans       *rc;
1134 int                             bits, cmd;
1135 {
1136         int    nec = rc->rc_rcb->rcb_addr;
1137         u_char         *dtr = &rc->rc_rcb->rcb_dtr, msvr;
1138
1139         rcout(CD180_CAR, rc->rc_chan);
1140
1141         switch (cmd) {
1142             case DMSET:
1143                 rcout(RC_DTREG, (bits & TIOCM_DTR) ?
1144                                 ~(*dtr |= 1 << rc->rc_chan) :
1145                                 ~(*dtr &= ~(1 << rc->rc_chan)));
1146                 msvr = rcin(CD180_MSVR);
1147                 if (bits & TIOCM_RTS)
1148                         msvr |= MSVR_RTS;
1149                 else
1150                         msvr &= ~MSVR_RTS;
1151                 if (bits & TIOCM_DTR)
1152                         msvr |= MSVR_DTR;
1153                 else
1154                         msvr &= ~MSVR_DTR;
1155                 rcout(CD180_MSVR, msvr);
1156                 break;
1157
1158             case DMBIS:
1159                 if (bits & TIOCM_DTR)
1160                         rcout(RC_DTREG, ~(*dtr |= 1 << rc->rc_chan));
1161                 msvr = rcin(CD180_MSVR);
1162                 if (bits & TIOCM_RTS)
1163                         msvr |= MSVR_RTS;
1164                 if (bits & TIOCM_DTR)
1165                         msvr |= MSVR_DTR;
1166                 rcout(CD180_MSVR, msvr);
1167                 break;
1168
1169             case DMGET:
1170                 bits = TIOCM_LE;
1171                 msvr = rc->rc_msvr = rcin(CD180_MSVR);
1172
1173                 if (msvr & MSVR_RTS)
1174                         bits |= TIOCM_RTS;
1175                 if (msvr & MSVR_CTS)
1176                         bits |= TIOCM_CTS;
1177                 if (msvr & MSVR_DSR)
1178                         bits |= TIOCM_DSR;
1179                 if (msvr & MSVR_DTR)
1180                         bits |= TIOCM_DTR;
1181                 if (msvr & MSVR_CD)
1182                         bits |= TIOCM_CD;
1183                 if (~rcin(RC_RIREG) & (1 << rc->rc_chan))
1184                         bits |= TIOCM_RI;
1185                 return bits;
1186
1187             case DMBIC:
1188                 if (bits & TIOCM_DTR)
1189                         rcout(RC_DTREG, ~(*dtr &= ~(1 << rc->rc_chan)));
1190                 msvr = rcin(CD180_MSVR);
1191                 if (bits & TIOCM_RTS)
1192                         msvr &= ~MSVR_RTS;
1193                 if (bits & TIOCM_DTR)
1194                         msvr &= ~MSVR_DTR;
1195                 rcout(CD180_MSVR, msvr);
1196                 break;
1197         }
1198         rc->rc_msvr = rcin(CD180_MSVR);
1199         return 0;
1200 }
1201
1202 /* Test the board. */
1203 int rc_test(nec, unit)
1204         int    nec;
1205         int             unit;
1206 {
1207         int     chan = 0;
1208         int     i = 0, rcnt;
1209         unsigned int    iack, chipid;
1210         unsigned short  divs;
1211         static  u_char  ctest[] = "\377\125\252\045\244\0\377";
1212 #define CTLEN   8
1213 #define ERR(s)  { \
1214                 printf("rc%d: ", unit); printf s ; printf("\n"); \
1215                 crit_exit(); return 1; }
1216
1217         struct rtest {
1218                 u_char  txbuf[CD180_NFIFO];     /* TX buffer  */
1219                 u_char  rxbuf[CD180_NFIFO];     /* RX buffer  */
1220                 int     rxptr;                  /* RX pointer */
1221                 int     txptr;                  /* TX pointer */
1222         } tchans[CD180_NCHAN];
1223
1224         crit_enter();
1225
1226         chipid = RC_FAKEID;
1227
1228         /* First, reset board to inital state */
1229         rc_hwreset(unit, nec, chipid);
1230
1231         divs = RC_BRD(19200);
1232
1233         /* Initialize channels */
1234         for (chan = 0; chan < CD180_NCHAN; chan++) {
1235
1236                 /* Select and reset channel */
1237                 rcout(CD180_CAR, chan);
1238                 CCRCMD(unit, chan, CCR_ResetChan);
1239                 WAITFORCCR(unit, chan);
1240
1241                 /* Set speed */
1242                 rcout(CD180_RBPRL, divs & 0xFF);
1243                 rcout(CD180_RBPRH, divs >> 8);
1244                 rcout(CD180_TBPRL, divs & 0xFF);
1245                 rcout(CD180_TBPRH, divs >> 8);
1246
1247                 /* set timeout value */
1248                 rcout(CD180_RTPR,  0);
1249
1250                 /* Establish local loopback */
1251                 rcout(CD180_COR1, COR1_NOPAR | COR1_8BITS | COR1_1SB);
1252                 rcout(CD180_COR2, COR2_LLM);
1253                 rcout(CD180_COR3, CD180_NFIFO);
1254                 CCRCMD(unit, chan, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
1255                 CCRCMD(unit, chan, CCR_RCVREN | CCR_XMTREN);
1256                 WAITFORCCR(unit, chan);
1257                 rcout(CD180_MSVR, MSVR_RTS);
1258
1259                 /* Fill TXBUF with test data */
1260                 for (i = 0; i < CD180_NFIFO; i++) {
1261                         tchans[chan].txbuf[i] = ctest[i];
1262                         tchans[chan].rxbuf[i] = 0;
1263                 }
1264                 tchans[chan].txptr = tchans[chan].rxptr = 0;
1265
1266                 /* Now, start transmit */
1267                 rcout(CD180_IER, IER_TxMpty|IER_RxData);
1268         }
1269         /* Pseudo-interrupt poll stuff */
1270         for (rcnt = 10000; rcnt-- > 0; rcnt--) {
1271                 i = ~(rcin(RC_BSR));
1272                 if (i & RC_BSR_TOUT)
1273                         ERR(("BSR timeout bit set\n"))
1274                 else if (i & RC_BSR_TXINT) {
1275                         iack = rcin(RC_PILR_TX);
1276                         if (iack != (GIVR_IT_TDI | chipid))
1277                                 ERR(("Bad TX intr ack (%02x != %02x)\n",
1278                                         iack, GIVR_IT_TDI | chipid));
1279                         chan = (rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH;
1280                         /* If no more data to transmit, disable TX intr */
1281                         if (tchans[chan].txptr >= CD180_NFIFO) {
1282                                 iack = rcin(CD180_IER);
1283                                 rcout(CD180_IER, iack & ~IER_TxMpty);
1284                         } else {
1285                                 for (iack = tchans[chan].txptr;
1286                                     iack < CD180_NFIFO; iack++)
1287                                         rcout(CD180_TDR,
1288                                             tchans[chan].txbuf[iack]);
1289                                 tchans[chan].txptr = iack;
1290                         }
1291                         rcout(CD180_EOIR, 0);
1292                 } else if (i & RC_BSR_RXINT) {
1293                         u_char ucnt;
1294
1295                         iack = rcin(RC_PILR_RX);
1296                         if (iack != (GIVR_IT_RGDI | chipid) &&
1297                             iack != (GIVR_IT_REI  | chipid))
1298                                 ERR(("Bad RX intr ack (%02x != %02x)\n",
1299                                         iack, GIVR_IT_RGDI | chipid))
1300                         chan = (rcin(CD180_GICR) & GICR_CHAN) >> GICR_LSH;
1301                         ucnt = rcin(CD180_RDCR) & 0xF;
1302                         while (ucnt-- > 0) {
1303                                 iack = rcin(CD180_RCSR);
1304                                 if (iack & RCSR_Timeout)
1305                                         break;
1306                                 if (iack & 0xF)
1307                                         ERR(("Bad char chan %d (RCSR = %02X)\n",
1308                                             chan, iack))
1309                                 if (tchans[chan].rxptr > CD180_NFIFO)
1310                                         ERR(("Got extra chars chan %d\n",
1311                                             chan))
1312                                 tchans[chan].rxbuf[tchans[chan].rxptr++] =
1313                                         rcin(CD180_RDR);
1314                         }
1315                         rcout(CD180_EOIR, 0);
1316                 }
1317                 rcout(RC_CTOUT, 0);
1318                 for (iack = chan = 0; chan < CD180_NCHAN; chan++)
1319                         if (tchans[chan].rxptr >= CD180_NFIFO)
1320                                 iack++;
1321                 if (iack == CD180_NCHAN)
1322                         break;
1323         }
1324         for (chan = 0; chan < CD180_NCHAN; chan++) {
1325                 /* Select and reset channel */
1326                 rcout(CD180_CAR, chan);
1327                 CCRCMD(unit, chan, CCR_ResetChan);
1328         }
1329
1330         if (!rcnt)
1331                 ERR(("looses characters during local loopback\n"))
1332         /* Now, check data */
1333         for (chan = 0; chan < CD180_NCHAN; chan++)
1334                 for (i = 0; i < CD180_NFIFO; i++)
1335                         if (ctest[i] != tchans[chan].rxbuf[i])
1336                                 ERR(("data mismatch chan %d ptr %d (%d != %d)\n",
1337                                     chan, i, ctest[i], tchans[chan].rxbuf[i]))
1338         crit_exit();
1339         return 0;
1340 }
1341
1342 #ifdef RCDEBUG
1343 static void printrcflags(rc, comment)
1344 struct rc_chans  *rc;
1345 char             *comment;
1346 {
1347         u_short f = rc->rc_flags;
1348         int    nec = rc->rc_rcb->rcb_addr;
1349
1350         printf("rc%d/%d: %s flags: %s%s%s%s%s%s%s%s%s%s%s%s\n",
1351                 rc->rc_rcb->rcb_unit, rc->rc_chan, comment,
1352                 (f & RC_DTR_OFF)?"DTR_OFF " :"",
1353                 (f & RC_ACTOUT) ?"ACTOUT " :"",
1354                 (f & RC_RTSFLOW)?"RTSFLOW " :"",
1355                 (f & RC_CTSFLOW)?"CTSFLOW " :"",
1356                 (f & RC_DORXFER)?"DORXFER " :"",
1357                 (f & RC_DOXXFER)?"DOXXFER " :"",
1358                 (f & RC_MODCHG) ?"MODCHG "  :"",
1359                 (f & RC_OSUSP)  ?"OSUSP " :"",
1360                 (f & RC_OSBUSY) ?"OSBUSY " :"",
1361                 (f & RC_WAS_BUFOVFL) ?"BUFOVFL " :"",
1362                 (f & RC_WAS_SILOVFL) ?"SILOVFL " :"",
1363                 (f & RC_SEND_RDY) ?"SEND_RDY":"");
1364
1365         rcout(CD180_CAR, rc->rc_chan);
1366
1367         printf("rc%d/%d: msvr %02x ier %02x ccsr %02x\n",
1368                 rc->rc_rcb->rcb_unit, rc->rc_chan,
1369                 rcin(CD180_MSVR),
1370                 rcin(CD180_IER),
1371                 rcin(CD180_CCSR));
1372 }
1373 #endif /* RCDEBUG */
1374
1375 static void
1376 rc_dtrwakeup(chan)
1377         void    *chan;
1378 {
1379         struct rc_chans  *rc;
1380
1381         rc = (struct rc_chans *)chan;
1382         rc->rc_flags &= ~RC_DTR_OFF;
1383         wakeup(&rc->rc_dtrwait);
1384 }
1385
1386 static void
1387 rc_discard_output(rc)
1388         struct rc_chans  *rc;
1389 {
1390         cpu_disable_intr();
1391         if (rc->rc_flags & RC_DOXXFER) {
1392                 rc_scheduled_event -= LOTS_OF_EVENTS;
1393                 rc->rc_flags &= ~RC_DOXXFER;
1394         }
1395         rc->rc_optr = rc->rc_obufend;
1396         rc->rc_tp->t_state &= ~TS_BUSY;
1397         cpu_enable_intr();
1398         ttwwakeup(rc->rc_tp);
1399 }
1400
1401 static void
1402 rc_wakeup(chan)
1403         void    *chan;
1404 {
1405         if (rc_scheduled_event != 0) {
1406                 crit_enter();
1407                 rcpoll(NULL, NULL);
1408                 crit_exit();
1409         }
1410         callout_reset(&rc_wakeup_ch, 1, rc_wakeup, NULL);
1411 }
1412
1413 static void
1414 disc_optim(tp, t, rc)
1415         struct tty      *tp;
1416         struct termios  *t;
1417         struct rc_chans *rc;
1418 {
1419
1420         if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
1421             && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
1422             && (!(t->c_iflag & PARMRK)
1423                 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
1424             && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
1425             && linesw[tp->t_line].l_rint == ttyinput)
1426                 tp->t_state |= TS_CAN_BYPASS_L_RINT;
1427         else
1428                 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
1429         rc->rc_hotchar = linesw[tp->t_line].l_hotchar;
1430 }
1431
1432 static void
1433 rc_wait0(nec, unit, chan, line)
1434         int     nec, unit, chan, line;
1435 {
1436         int rcnt;
1437
1438         for (rcnt = 50; rcnt && rcin(CD180_CCR); rcnt--)
1439                 DELAY(30);
1440         if (rcnt == 0)
1441                 printf("rc%d/%d: channel command timeout, rc.c line: %d\n",
1442                       unit, chan, line);
1443 }