sys/dev/si/si.c

   1 /*
   2  * Device driver for Specialix range (SI/XIO) of serial line multiplexors.
   3  *
   4  * Copyright (C) 1990, 1992, 1998 Specialix International,
   5  * Copyright (C) 1993, Andy Rutter <andy@acronym.co.uk>
   6  * Copyright (C) 2000, Peter Wemm <peter@netplex.com.au>
   7  *
   8  * Originally derived from:     SunOS 4.x version
   9  * Ported from BSDI version to FreeBSD by Peter Wemm.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notices, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notices, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by Andy Rutter of
  22  *      Advanced Methods and Tools Ltd. based on original information
  23  *      from Specialix International.
  24  * 4. Neither the name of Advanced Methods and Tools, nor Specialix
  25  *    International may be used to endorse or promote products derived from
  26  *    this software without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
  29  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  30  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
  31  * NO EVENT SHALL THE AUTHORS BE LIABLE.
  32  *
  33  * $FreeBSD$
  34  */
  35
  36 #ifndef lint
  37 static const char si_copyright1[] =  "@(#) Copyright (C) Specialix International, 1990,1992,1998",
  38                   si_copyright2[] =  "@(#) Copyright (C) Andy Rutter 1993",
  39                   si_copyright3[] =  "@(#) Copyright (C) Peter Wemm 2000";
  40 #endif  /* not lint */
  41
  42 #include "opt_compat.h"
  43 #include "opt_debug_si.h"
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
  48 #include <sys/ioctl_compat.h>
  49 #endif
  50 #include <sys/tty.h>
  51 #include <sys/conf.h>
  52 #include <sys/fcntl.h>
  53 #include <sys/dkstat.h>
  54 #include <sys/kernel.h>
  55 #include <sys/malloc.h>
  56 #include <sys/sysctl.h>
  57 #include <sys/bus.h>
  58 #include <machine/bus.h>
  59 #include <sys/rman.h>
  60 #include <machine/resource.h>
  61
  62
  63 #include <vm/vm.h>
  64 #include <vm/pmap.h>
  65
  66 #include <machine/stdarg.h>
  67
  68 #include <dev/si/sireg.h>
  69 #include <dev/si/sivar.h>
  70 #include <dev/si/si.h>
  71
  72 /*
  73  * This device driver is designed to interface the Specialix International
  74  * SI, XIO and SX range of serial multiplexor cards to FreeBSD on an ISA,
  75  * EISA or PCI bus machine.
  76  *
  77  * The controller is interfaced to the host via dual port RAM
  78  * and an interrupt.
  79  *
  80  * The code for the Host 1 (very old ISA cards) has not been tested.
  81  */
  82
  83 #define POLL            /* turn on poller to scan for lost interrupts */
  84 #define REALPOLL        /* on each poll, scan for work regardless */
  85 #define POLLHZ  (hz/10) /* 10 times per second */
  86 #define SI_I_HIGH_WATER (TTYHOG - 2 * SI_BUFFERSIZE)
  87 #define INT_COUNT 25000         /* max of 125 ints per second */
  88 #define JET_INT_COUNT 100       /* max of 100 ints per second */
  89 #define RXINT_COUNT 1   /* one rxint per 10 milliseconds */
  90
  91 enum si_mctl { GET, SET, BIS, BIC };
  92
  93 static void si_command(struct si_port *, int, int);
  94 static int si_modem(struct si_port *, enum si_mctl, int);
  95 static void si_write_enable(struct si_port *, int);
  96 static int si_Sioctl(dev_t, u_long, caddr_t, int, struct thread *);
  97 static void si_start(struct tty *);
  98 static void si_stop(struct tty *, int);
  99 static timeout_t si_lstart;
 100 static void si_disc_optim(struct tty *tp, struct termios *t,struct si_port *pp);
 101 static void sihardclose(struct si_port *pp);
 102 static void sidtrwakeup(void *chan);
 103
 104 #ifdef SI_DEBUG
 105 static char     *si_mctl2str(enum si_mctl cmd);
 106 #endif
 107
 108 static int      siparam(struct tty *, struct termios *);
 109
 110 static void     si_modem_state(struct si_port *pp, struct tty *tp, int hi_ip);
 111 static char *   si_modulename(int host_type, int uart_type);
 112
 113 static  d_open_t        siopen;
 114 static  d_close_t       siclose;
 115 static  d_write_t       siwrite;
 116 static  d_ioctl_t       siioctl;
 117
 118 #define CDEV_MAJOR      68
 119 static struct cdevsw si_cdevsw = {
 120         /* open */      siopen,
 121         /* close */     siclose,
 122         /* read */      ttyread,
 123         /* write */     siwrite,
 124         /* ioctl */     siioctl,
 125         /* poll */      ttypoll,
 126         /* mmap */      nommap,
 127         /* strategy */  nostrategy,
 128         /* name */      "si",
 129         /* maj */       CDEV_MAJOR,
 130         /* dump */      nodump,
 131         /* psize */     nopsize,
 132         /* flags */     D_TTY | D_KQFILTER,
 133         /* kqfilter */  ttykqfilter,
 134 };
 135
 136 static int si_Nports;
 137 static int si_Nmodules;
 138 static int si_debug = 0;        /* data, not bss, so it's patchable */
 139
 140 SYSCTL_INT(_machdep, OID_AUTO, si_debug, CTLFLAG_RW, &si_debug, 0, "");
 141 TUNABLE_INT("machdep.si_debug", &si_debug);
 142
 143 static int si_numunits;
 144
 145 devclass_t si_devclass;
 146
 147 #ifndef B2000   /* not standard, but the hardware knows it. */
 148 # define B2000 2000
 149 #endif
 150 static struct speedtab bdrates[] = {
 151         { B75,          CLK75, },       /* 0x0 */
 152         { B110,         CLK110, },      /* 0x1 */
 153         { B150,         CLK150, },      /* 0x3 */
 154         { B300,         CLK300, },      /* 0x4 */
 155         { B600,         CLK600, },      /* 0x5 */
 156         { B1200,        CLK1200, },     /* 0x6 */
 157         { B2000,        CLK2000, },     /* 0x7 */
 158         { B2400,        CLK2400, },     /* 0x8 */
 159         { B4800,        CLK4800, },     /* 0x9 */
 160         { B9600,        CLK9600, },     /* 0xb */
 161         { B19200,       CLK19200, },    /* 0xc */
 162         { B38400,       CLK38400, },    /* 0x2 (out of order!) */
 163         { B57600,       CLK57600, },    /* 0xd */
 164         { B115200,      CLK110, },      /* 0x1 (dupe!, 110 baud on "si") */
 165         { -1,           -1 },
 166 };
 167
 168
 169 /* populated with approx character/sec rates - translated at card
 170  * initialisation time to chars per tick of the clock */
 171 static int done_chartimes = 0;
 172 static struct speedtab chartimes[] = {
 173         { B75,          8, },
 174         { B110,         11, },
 175         { B150,         15, },
 176         { B300,         30, },
 177         { B600,         60, },
 178         { B1200,        120, },
 179         { B2000,        200, },
 180         { B2400,        240, },
 181         { B4800,        480, },
 182         { B9600,        960, },
 183         { B19200,       1920, },
 184         { B38400,       3840, },
 185         { B57600,       5760, },
 186         { B115200,      11520, },
 187         { -1,           -1 },
 188 };
 189 static volatile int in_intr = 0;        /* Inside interrupt handler? */
 190
 191 #ifdef POLL
 192 static int si_pollrate;                 /* in addition to irq */
 193 static int si_realpoll = 0;             /* poll HW on timer */
 194
 195 SYSCTL_INT(_machdep, OID_AUTO, si_pollrate, CTLFLAG_RW, &si_pollrate, 0, "");
 196 SYSCTL_INT(_machdep, OID_AUTO, si_realpoll, CTLFLAG_RW, &si_realpoll, 0, "");
 197
 198 static int init_finished = 0;
 199 static void si_poll(void *);
 200 #endif
 201
 202 /*
 203  * Array of adapter types and the corresponding RAM size. The order of
 204  * entries here MUST match the ordinal of the adapter type.
 205  */
 206 static char *si_type[] = {
 207         "EMPTY",
 208         "SIHOST",
 209         "SIMCA",                /* FreeBSD does not support Microchannel */
 210         "SIHOST2",
 211         "SIEISA",
 212         "SIPCI",
 213         "SXPCI",
 214         "SXISA",
 215 };
 216
 217 /*
 218  * We have to make an 8 bit version of bcopy, since some cards can't
 219  * deal with 32 bit I/O
 220  */
 221 static void __inline
 222 si_bcopy(const void *src, void *dst, size_t len)
 223 {
 224         while (len--)
 225                 *(((u_char *)dst)++) = *(((const u_char *)src)++);
 226 }
 227 static void __inline
 228 si_vbcopy(const volatile void *src, void *dst, size_t len)
 229 {
 230         while (len--)
 231                 *(((u_char *)dst)++) = *(((const volatile u_char *)src)++);
 232 }
 233 static void __inline
 234 si_bcopyv(const void *src, volatile void *dst, size_t len)
 235 {
 236         while (len--)
 237                 *(((volatile u_char *)dst)++) = *(((const u_char *)src)++);
 238 }
 239
 240
 241 /*
 242  * Attach the device.  Initialize the card.
 243  */
 244 int
 245 siattach(device_t dev)
 246 {
 247         int unit;
 248         struct si_softc *sc;
 249         struct si_port *pp;
 250         volatile struct si_channel *ccbp;
 251         volatile struct si_reg *regp;
 252         volatile caddr_t maddr;
 253         struct si_module *modp;
 254         struct speedtab *spt;
 255         int nmodule, nport, x, y;
 256         int uart_type;
 257
 258         sc = device_get_softc(dev);
 259         unit = device_get_unit(dev);
 260
 261         sc->sc_typename = si_type[sc->sc_type];
 262         if (si_numunits < unit + 1)
 263                 si_numunits = unit + 1;
 264
 265         DPRINT((0, DBG_AUTOBOOT, "si%d: siattach\n", unit));
 266
 267 #ifdef POLL
 268         if (si_pollrate == 0) {
 269                 si_pollrate = POLLHZ;           /* in addition to irq */
 270 #ifdef REALPOLL
 271                 si_realpoll = 1;                /* scan always */
 272 #endif
 273         }
 274 #endif
 275
 276         DPRINT((0, DBG_AUTOBOOT, "si%d: type: %s paddr: %x maddr: %x\n", unit,
 277                 sc->sc_typename, sc->sc_paddr, sc->sc_maddr));
 278
 279         sc->sc_ports = NULL;                    /* mark as uninitialised */
 280
 281         maddr = sc->sc_maddr;
 282
 283         /* Stop the CPU first so it won't stomp around while we load */
 284
 285         switch (sc->sc_type) {
 286                 case SIEISA:
 287                         outb(sc->sc_iobase + 2, sc->sc_irq << 4);
 288                 break;
 289                 case SIPCI:
 290                         *(maddr+SIPCIRESET) = 0;
 291                 break;
 292                 case SIJETPCI: /* fall through to JET ISA */
 293                 case SIJETISA:
 294                         *(maddr+SIJETCONFIG) = 0;
 295                 break;
 296                 case SIHOST2:
 297                         *(maddr+SIPLRESET) = 0;
 298                 break;
 299                 case SIHOST:
 300                         *(maddr+SIRESET) = 0;
 301                 break;
 302                 default: /* this should never happen */
 303                         printf("si%d: unsupported configuration\n", unit);
 304                         return EINVAL;
 305                 break;
 306         }
 307
 308         /* OK, now lets download the download code */
 309
 310         if (SI_ISJET(sc->sc_type)) {
 311                 DPRINT((0, DBG_DOWNLOAD, "si%d: jet_download: nbytes %d\n",
 312                         unit, si3_t225_dsize));
 313                 si_bcopy(si3_t225_download, maddr + si3_t225_downloadaddr,
 314                         si3_t225_dsize);
 315                 DPRINT((0, DBG_DOWNLOAD,
 316                         "si%d: jet_bootstrap: nbytes %d -> %x\n",
 317                         unit, si3_t225_bsize, si3_t225_bootloadaddr));
 318                 si_bcopy(si3_t225_bootstrap, maddr + si3_t225_bootloadaddr,
 319                         si3_t225_bsize);
 320         } else {
 321                 DPRINT((0, DBG_DOWNLOAD, "si%d: si_download: nbytes %d\n",
 322                         unit, si2_z280_dsize));
 323                 si_bcopy(si2_z280_download, maddr + si2_z280_downloadaddr,
 324                         si2_z280_dsize);
 325         }
 326
 327         /* Now start the CPU */
 328
 329         switch (sc->sc_type) {
 330         case SIEISA:
 331                 /* modify the download code to tell it that it's on an EISA */
 332                 *(maddr + 0x42) = 1;
 333                 outb(sc->sc_iobase + 2, (sc->sc_irq << 4) | 4);
 334                 (void)inb(sc->sc_iobase + 3); /* reset interrupt */
 335                 break;
 336         case SIPCI:
 337                 /* modify the download code to tell it that it's on a PCI */
 338                 *(maddr+0x42) = 1;
 339                 *(maddr+SIPCIRESET) = 1;
 340                 *(maddr+SIPCIINTCL) = 0;
 341                 break;
 342         case SIJETPCI:
 343                 *(maddr+SIJETRESET) = 0;
 344                 *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN;
 345                 break;
 346         case SIJETISA:
 347                 *(maddr+SIJETRESET) = 0;
 348                 switch (sc->sc_irq) {
 349                 case 9:
 350                         *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN|0x90;
 351                         break;
 352                 case 10:
 353                         *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN|0xa0;
 354                         break;
 355                 case 11:
 356                         *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN|0xb0;
 357                         break;
 358                 case 12:
 359                         *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN|0xc0;
 360                         break;
 361                 case 15:
 362                         *(maddr+SIJETCONFIG) = SIJETBUSEN|SIJETIRQEN|0xf0;
 363                         break;
 364                 }
 365                 break;
 366         case SIHOST:
 367                 *(maddr+SIRESET_CL) = 0;
 368                 *(maddr+SIINTCL_CL) = 0;
 369                 break;
 370         case SIHOST2:
 371                 *(maddr+SIPLRESET) = 0x10;
 372                 switch (sc->sc_irq) {
 373                 case 11:
 374                         *(maddr+SIPLIRQ11) = 0x10;
 375                         break;
 376                 case 12:
 377                         *(maddr+SIPLIRQ12) = 0x10;
 378                         break;
 379                 case 15:
 380                         *(maddr+SIPLIRQ15) = 0x10;
 381                         break;
 382                 }
 383                 *(maddr+SIPLIRQCLR) = 0x10;
 384                 break;
 385         default: /* this should _REALLY_ never happen */
 386                 printf("si%d: Uh, it was supported a second ago...\n", unit);
 387                 return EINVAL;
 388         }
 389
 390         DELAY(1000000);                 /* wait around for a second */
 391
 392         regp = (struct si_reg *)maddr;
 393         y = 0;
 394                                         /* wait max of 5 sec for init OK */
 395         while (regp->initstat == 0 && y++ < 10) {
 396                 DELAY(500000);
 397         }
 398         switch (regp->initstat) {
 399         case 0:
 400                 printf("si%d: startup timeout - aborting\n", unit);
 401                 sc->sc_type = SIEMPTY;
 402                 return EINVAL;
 403         case 1:
 404                 if (SI_ISJET(sc->sc_type)) {
 405                         /* set throttle to 100 times per second */
 406                         regp->int_count = JET_INT_COUNT;
 407                         /* rx_intr_count is a NOP in Jet */
 408                 } else {
 409                         /* set throttle to 125 times per second */
 410                         regp->int_count = INT_COUNT;
 411                         /* rx intr max of 25 times per second */
 412                         regp->rx_int_count = RXINT_COUNT;
 413                 }
 414                 regp->int_pending = 0;          /* no intr pending */
 415                 regp->int_scounter = 0; /* reset counter */
 416                 break;
 417         case 0xff:
 418                 /*
 419                  * No modules found, so give up on this one.
 420                  */
 421                 printf("si%d: %s - no ports found\n", unit,
 422                         si_type[sc->sc_type]);
 423                 return 0;
 424         default:
 425                 printf("si%d: download code version error - initstat %x\n",
 426                         unit, regp->initstat);
 427                 return EINVAL;
 428         }
 429
 430         /*
 431          * First time around the ports just count them in order
 432          * to allocate some memory.
 433          */
 434         nport = 0;
 435         modp = (struct si_module *)(maddr + 0x80);
 436         for (;;) {
 437                 DPRINT((0, DBG_DOWNLOAD, "si%d: ccb addr 0x%x\n", unit, modp));
 438                 switch (modp->sm_type) {
 439                 case TA4:
 440                         DPRINT((0, DBG_DOWNLOAD,
 441                                 "si%d: Found old TA4 module, 4 ports\n",
 442                                 unit));
 443                         x = 4;
 444                         break;
 445                 case TA8:
 446                         DPRINT((0, DBG_DOWNLOAD,
 447                                 "si%d: Found old TA8 module, 8 ports\n",
 448                                 unit));
 449                         x = 8;
 450                         break;
 451                 case TA4_ASIC:
 452                         DPRINT((0, DBG_DOWNLOAD,
 453                                 "si%d: Found ASIC TA4 module, 4 ports\n",
 454                                 unit));
 455                         x = 4;
 456                         break;
 457                 case TA8_ASIC:
 458                         DPRINT((0, DBG_DOWNLOAD,
 459                                 "si%d: Found ASIC TA8 module, 8 ports\n",
 460                                 unit));
 461                         x = 8;
 462                         break;
 463                 case MTA:
 464                         DPRINT((0, DBG_DOWNLOAD,
 465                                 "si%d: Found CD1400 module, 8 ports\n",
 466                                 unit));
 467                         x = 8;
 468                         break;
 469                 case SXDC:
 470                         DPRINT((0, DBG_DOWNLOAD,
 471                                 "si%d: Found SXDC module, 8 ports\n",
 472                                 unit));
 473                         x = 8;
 474                         break;
 475                 default:
 476                         printf("si%d: unknown module type %d\n",
 477                                 unit, modp->sm_type);
 478                         goto try_next;
 479                 }
 480
 481                 /* this was limited in firmware and is also a driver issue */
 482                 if ((nport + x) > SI_MAXPORTPERCARD) {
 483                         printf("si%d: extra ports ignored\n", unit);
 484                         goto try_next;
 485                 }
 486
 487                 nport += x;
 488                 si_Nports += x;
 489                 si_Nmodules++;
 490
 491 try_next:
 492                 if (modp->sm_next == 0)
 493                         break;
 494                 modp = (struct si_module *)
 495                         (maddr + (unsigned)(modp->sm_next & 0x7fff));
 496         }
 497         sc->sc_ports = (struct si_port *)malloc(sizeof(struct si_port) * nport,
 498                 M_DEVBUF, M_NOWAIT | M_ZERO);
 499         if (sc->sc_ports == 0) {
 500                 printf("si%d: fail to malloc memory for port structs\n",
 501                         unit);
 502                 return EINVAL;
 503         }
 504         sc->sc_nport = nport;
 505
 506         /*
 507          * Scan round the ports again, this time initialising.
 508          */
 509         pp = sc->sc_ports;
 510         nmodule = 0;
 511         modp = (struct si_module *)(maddr + 0x80);
 512         uart_type = 1000;       /* arbitary, > uchar_max */
 513         for (;;) {
 514                 switch (modp->sm_type) {
 515                 case TA4:
 516                         nport = 4;
 517                         break;
 518                 case TA8:
 519                         nport = 8;
 520                         break;
 521                 case TA4_ASIC:
 522                         nport = 4;
 523                         break;
 524                 case TA8_ASIC:
 525                         nport = 8;
 526                         break;
 527                 case MTA:
 528                         nport = 8;
 529                         break;
 530                 case SXDC:
 531                         nport = 8;
 532                         break;
 533                 default:
 534                         goto try_next2;
 535                 }
 536                 nmodule++;
 537                 ccbp = (struct si_channel *)((char *)modp + 0x100);
 538                 if (uart_type == 1000)
 539                         uart_type = ccbp->type;
 540                 else if (uart_type != ccbp->type)
 541                         printf("si%d: Warning: module %d mismatch! (%d%s != %d%s)\n",
 542                             unit, nmodule,
 543                             ccbp->type, si_modulename(sc->sc_type, ccbp->type),
 544                             uart_type, si_modulename(sc->sc_type, uart_type));
 545
 546                 for (x = 0; x < nport; x++, pp++, ccbp++) {
 547                         pp->sp_ccb = ccbp;      /* save the address */
 548                         pp->sp_tty = ttymalloc(NULL);
 549                         pp->sp_pend = IDLE_CLOSE;
 550                         pp->sp_state = 0;       /* internal flag */
 551                         pp->sp_dtr_wait = 3 * hz;
 552                         pp->sp_iin.c_iflag = TTYDEF_IFLAG;
 553                         pp->sp_iin.c_oflag = TTYDEF_OFLAG;
 554                         pp->sp_iin.c_cflag = TTYDEF_CFLAG;
 555                         pp->sp_iin.c_lflag = TTYDEF_LFLAG;
 556                         termioschars(&pp->sp_iin);
 557                         pp->sp_iin.c_ispeed = pp->sp_iin.c_ospeed =
 558                                 TTYDEF_SPEED;;
 559                         pp->sp_iout = pp->sp_iin;
 560                 }
 561 try_next2:
 562                 if (modp->sm_next == 0) {
 563                         printf("si%d: card: %s, ports: %d, modules: %d, type: %d%s\n",
 564                                 unit,
 565                                 sc->sc_typename,
 566                                 sc->sc_nport,
 567                                 nmodule,
 568                                 uart_type,
 569                                 si_modulename(sc->sc_type, uart_type));
 570                         break;
 571                 }
 572                 modp = (struct si_module *)
 573                         (maddr + (unsigned)(modp->sm_next & 0x7fff));
 574         }
 575         if (done_chartimes == 0) {
 576                 for (spt = chartimes ; spt->sp_speed != -1; spt++) {
 577                         if ((spt->sp_code /= hz) == 0)
 578                                 spt->sp_code = 1;
 579                 }
 580                 done_chartimes = 1;
 581         }
 582
 583 /*      path    name    devsw           minor   type   uid gid perm*/
 584         for (x = 0; x < sc->sc_nport; x++) {
 585                 /* sync with the manuals that start at 1 */
 586                 y = x + 1 + unit * (1 << SI_CARDSHIFT);
 587                 make_dev(&si_cdevsw, x, 0, 0, 0600, "ttyA%02d", y);
 588                 make_dev(&si_cdevsw, x + 0x00080, 0, 0, 0600, "cuaA%02d", y);
 589                 make_dev(&si_cdevsw, x + 0x10000, 0, 0, 0600, "ttyiA%02d", y);
 590                 make_dev(&si_cdevsw, x + 0x10080, 0, 0, 0600, "cuaiA%02d", y);
 591                 make_dev(&si_cdevsw, x + 0x20000, 0, 0, 0600, "ttylA%02d", y);
 592                 make_dev(&si_cdevsw, x + 0x20080, 0, 0, 0600, "cualA%02d", y);
 593         }
 594         make_dev(&si_cdevsw, 0x40000, 0, 0, 0600, "si_control");
 595         return (0);
 596 }
 597
 598 static  int
 599 siopen(dev_t dev, int flag, int mode, struct thread *td)
 600 {
 601         int oldspl, error;
 602         int card, port;
 603         struct si_softc *sc;
 604         struct tty *tp;
 605         volatile struct si_channel *ccbp;
 606         struct si_port *pp;
 607         int mynor = minor(dev);
 608
 609         /* quickly let in /dev/si_control */
 610         if (IS_CONTROLDEV(mynor)) {
 611                 if ((error = suser(td)))
 612                         return(error);
 613                 return(0);
 614         }
 615
 616         card = SI_CARD(mynor);
 617         sc = devclass_get_softc(si_devclass, card);
 618         if (sc == NULL)
 619                 return (ENXIO);
 620
 621         if (sc->sc_type == SIEMPTY) {
 622                 DPRINT((0, DBG_OPEN|DBG_FAIL, "si%d: type %s??\n",
 623                         card, sc->sc_typename));
 624                 return(ENXIO);
 625         }
 626
 627         port = SI_PORT(mynor);
 628         if (port >= sc->sc_nport) {
 629                 DPRINT((0, DBG_OPEN|DBG_FAIL, "si%d: nports %d\n",
 630                         card, sc->sc_nport));
 631                 return(ENXIO);
 632         }
 633
 634 #ifdef  POLL
 635         /*
 636          * We've now got a device, so start the poller.
 637          */
 638         if (init_finished == 0) {
 639                 timeout(si_poll, (caddr_t)0L, si_pollrate);
 640                 init_finished = 1;
 641         }
 642 #endif
 643
 644         /* initial/lock device */
 645         if (IS_STATE(mynor)) {
 646                 return(0);
 647         }
 648
 649         pp = sc->sc_ports + port;
 650         tp = pp->sp_tty;                        /* the "real" tty */
 651         dev->si_tty = tp;
 652         ccbp = pp->sp_ccb;                      /* Find control block */
 653         DPRINT((pp, DBG_ENTRY|DBG_OPEN, "siopen(%s,%x,%x,%x)\n",
 654                 devtoname(dev), flag, mode, td));
 655
 656         oldspl = spltty();                      /* Keep others out */
 657         error = 0;
 658
 659 open_top:
 660         while (pp->sp_state & SS_DTR_OFF) {
 661                 error = tsleep(&pp->sp_dtr_wait, TTIPRI|PCATCH, "sidtr", 0);
 662                 if (error != 0)
 663                         goto out;
 664         }
 665
 666         if (tp->t_state & TS_ISOPEN) {
 667                 /*
 668                  * The device is open, so everything has been initialised.
 669                  * handle conflicts.
 670                  */
 671                 if (IS_CALLOUT(mynor)) {
 672                         if (!pp->sp_active_out) {
 673                                 error = EBUSY;
 674                                 goto out;
 675                         }
 676                 } else {
 677                         if (pp->sp_active_out) {
 678                                 if (flag & O_NONBLOCK) {
 679                                         error = EBUSY;
 680                                         goto out;
 681                                 }
 682                                 error = tsleep(&pp->sp_active_out,
 683                                                 TTIPRI|PCATCH, "sibi", 0);
 684                                 if (error != 0)
 685                                         goto out;
 686                                 goto open_top;
 687                         }
 688                 }
 689                 if (tp->t_state & TS_XCLUDE &&
 690                     suser(td)) {
 691                         DPRINT((pp, DBG_OPEN|DBG_FAIL,
 692                                 "already open and EXCLUSIVE set\n"));
 693                         error = EBUSY;
 694                         goto out;
 695                 }
 696         } else {
 697                 /*
 698                  * The device isn't open, so there are no conflicts.
 699                  * Initialize it. Avoid sleep... :-)
 700                  */
 701                 DPRINT((pp, DBG_OPEN, "first open\n"));
 702                 tp->t_oproc = si_start;
 703                 tp->t_stop = si_stop;
 704                 tp->t_param = siparam;
 705                 tp->t_dev = dev;
 706                 tp->t_termios = mynor & SI_CALLOUT_MASK
 707                                 ? pp->sp_iout : pp->sp_iin;
 708
 709                 (void) si_modem(pp, SET, TIOCM_DTR|TIOCM_RTS);
 710
 711                 ++pp->sp_wopeners;      /* in case of sleep in siparam */
 712
 713                 error = siparam(tp, &tp->t_termios);
 714
 715                 --pp->sp_wopeners;
 716                 if (error != 0)
 717                         goto out;
 718                 /* XXX: we should goto_top if siparam slept */
 719
 720                 /* set initial DCD state */
 721                 pp->sp_last_hi_ip = ccbp->hi_ip;
 722                 if ((pp->sp_last_hi_ip & IP_DCD) || IS_CALLOUT(mynor)) {
 723                         (*linesw[tp->t_line].l_modem)(tp, 1);
 724                 }
 725         }
 726
 727         /* whoops! we beat the close! */
 728         if (pp->sp_state & SS_CLOSING) {
 729                 /* try and stop it from proceeding to bash the hardware */
 730                 pp->sp_state &= ~SS_CLOSING;
 731         }
 732
 733         /*
 734          * Wait for DCD if necessary
 735          */
 736         if (!(tp->t_state & TS_CARR_ON) &&
 737             !IS_CALLOUT(mynor) &&
 738             !(tp->t_cflag & CLOCAL) &&
 739             !(flag & O_NONBLOCK)) {
 740                 ++pp->sp_wopeners;
 741                 DPRINT((pp, DBG_OPEN, "sleeping for carrier\n"));
 742                 error = tsleep(TSA_CARR_ON(tp), TTIPRI|PCATCH, "sidcd", 0);
 743                 --pp->sp_wopeners;
 744                 if (error != 0)
 745                         goto out;
 746                 goto open_top;
 747         }
 748
 749         error = (*linesw[tp->t_line].l_open)(dev, tp);
 750         si_disc_optim(tp, &tp->t_termios, pp);
 751         if (tp->t_state & TS_ISOPEN && IS_CALLOUT(mynor))
 752                 pp->sp_active_out = TRUE;
 753
 754         pp->sp_state |= SS_OPEN;        /* made it! */
 755
 756 out:
 757         splx(oldspl);
 758
 759         DPRINT((pp, DBG_OPEN, "leaving siopen\n"));
 760
 761         if (!(tp->t_state & TS_ISOPEN) && pp->sp_wopeners == 0)
 762                 sihardclose(pp);
 763
 764         return(error);
 765 }
 766
 767 static  int
 768 siclose(dev_t dev, int flag, int mode, struct thread *td)
 769 {
 770         struct si_port *pp;
 771         struct tty *tp;
 772         int oldspl;
 773         int error = 0;
 774         int mynor = minor(dev);
 775
 776         if (IS_SPECIAL(mynor))
 777                 return(0);
 778
 779         oldspl = spltty();
 780
 781         pp = MINOR2PP(mynor);
 782         tp = pp->sp_tty;
 783
 784         DPRINT((pp, DBG_ENTRY|DBG_CLOSE, "siclose(%s,%x,%x,%x) sp_state:%x\n",
 785                 devtoname(dev), flag, mode, td, pp->sp_state));
 786
 787         /* did we sleep and loose a race? */
 788         if (pp->sp_state & SS_CLOSING) {
 789                 /* error = ESOMETING? */
 790                 goto out;
 791         }
 792
 793         /* begin race detection.. */
 794         pp->sp_state |= SS_CLOSING;
 795
 796         si_write_enable(pp, 0);         /* block writes for ttywait() */
 797
 798         /* THIS MAY SLEEP IN TTYWAIT!!! */
 799         (*linesw[tp->t_line].l_close)(tp, flag);
 800
 801         si_write_enable(pp, 1);
 802
 803         /* did we sleep and somebody started another open? */
 804         if (!(pp->sp_state & SS_CLOSING)) {
 805                 /* error = ESOMETING? */
 806                 goto out;
 807         }
 808         /* ok. we are now still on the right track.. nuke the hardware */
 809
 810         if (pp->sp_state & SS_LSTART) {
 811                 untimeout(si_lstart, (caddr_t)pp, pp->lstart_ch);
 812                 pp->sp_state &= ~SS_LSTART;
 813         }
 814
 815         si_stop(tp, FREAD | FWRITE);
 816
 817         sihardclose(pp);
 818         ttyclose(tp);
 819         pp->sp_state &= ~SS_OPEN;
 820
 821 out:
 822         DPRINT((pp, DBG_CLOSE|DBG_EXIT, "close done, returning\n"));
 823         splx(oldspl);
 824         return(error);
 825 }
 826
 827 static void
 828 sihardclose(struct si_port *pp)
 829 {
 830         int oldspl;
 831         struct tty *tp;
 832         volatile struct si_channel *ccbp;
 833
 834         oldspl = spltty();
 835
 836         tp = pp->sp_tty;
 837         ccbp = pp->sp_ccb;                      /* Find control block */
 838         if (tp->t_cflag & HUPCL ||
 839             (!pp->sp_active_out &&
 840              !(ccbp->hi_ip & IP_DCD) &&
 841              !(pp->sp_iin.c_cflag && CLOCAL)) ||
 842             !(tp->t_state & TS_ISOPEN)) {
 843
 844                 (void) si_modem(pp, BIC, TIOCM_DTR|TIOCM_RTS);
 845                 (void) si_command(pp, FCLOSE, SI_NOWAIT);
 846
 847                 if (pp->sp_dtr_wait != 0) {
 848                         timeout(sidtrwakeup, pp, pp->sp_dtr_wait);
 849                         pp->sp_state |= SS_DTR_OFF;
 850                 }
 851
 852         }
 853         pp->sp_active_out = FALSE;
 854         wakeup((caddr_t)&pp->sp_active_out);
 855         wakeup(TSA_CARR_ON(tp));
 856
 857         splx(oldspl);
 858 }
 859
 860
 861 /*
 862  * called at splsoftclock()...
 863  */
 864 static void
 865 sidtrwakeup(void *chan)
 866 {
 867         struct si_port *pp;
 868         int oldspl;
 869
 870         oldspl = spltty();
 871
 872         pp = (struct si_port *)chan;
 873         pp->sp_state &= ~SS_DTR_OFF;
 874         wakeup(&pp->sp_dtr_wait);
 875
 876         splx(oldspl);
 877 }
 878
 879 static  int
 880 siwrite(dev_t dev, struct uio *uio, int flag)
 881 {
 882         struct si_port *pp;
 883         struct tty *tp;
 884         int error = 0;
 885         int mynor = minor(dev);
 886         int oldspl;
 887
 888         if (IS_SPECIAL(mynor)) {
 889                 DPRINT((0, DBG_ENTRY|DBG_FAIL|DBG_WRITE, "siwrite(CONTROLDEV!!)\n"));
 890                 return(ENODEV);
 891         }
 892         pp = MINOR2PP(mynor);
 893         tp = pp->sp_tty;
 894         DPRINT((pp, DBG_WRITE, "siwrite(%s,%x,%x)\n", devtoname(dev), uio, flag));
 895
 896         oldspl = spltty();
 897         /*
 898          * If writes are currently blocked, wait on the "real" tty
 899          */
 900         while (pp->sp_state & SS_BLOCKWRITE) {
 901                 pp->sp_state |= SS_WAITWRITE;
 902                 DPRINT((pp, DBG_WRITE, "in siwrite, wait for SS_BLOCKWRITE to clear\n"));
 903                 if ((error = ttysleep(tp, (caddr_t)pp, TTOPRI|PCATCH,
 904                                      "siwrite", tp->t_timeout))) {
 905                         if (error == EWOULDBLOCK)
 906                                 error = EIO;
 907                         goto out;
 908                 }
 909         }
 910
 911         error = (*linesw[tp->t_line].l_write)(tp, uio, flag);
 912 out:
 913         splx(oldspl);
 914         return (error);
 915 }
 916
 917
 918 static  int
 919 siioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
 920 {
 921         struct si_port *pp;
 922         struct tty *tp;
 923         int error;
 924         int mynor = minor(dev);
 925         int oldspl;
 926         int blocked = 0;
 927 #if defined(COMPAT_43)
 928         u_long oldcmd;
 929         struct termios term;
 930 #endif
 931
 932         if (IS_SI_IOCTL(cmd))
 933                 return(si_Sioctl(dev, cmd, data, flag, td));
 934
 935         pp = MINOR2PP(mynor);
 936         tp = pp->sp_tty;
 937
 938         DPRINT((pp, DBG_ENTRY|DBG_IOCTL, "siioctl(%s,%lx,%x,%x)\n",
 939                 devtoname(dev), cmd, data, flag));
 940         if (IS_STATE(mynor)) {
 941                 struct termios *ct;
 942
 943                 switch (mynor & SI_STATE_MASK) {
 944                 case SI_INIT_STATE_MASK:
 945                         ct = IS_CALLOUT(mynor) ? &pp->sp_iout : &pp->sp_iin;
 946                         break;
 947                 case SI_LOCK_STATE_MASK:
 948                         ct = IS_CALLOUT(mynor) ? &pp->sp_lout : &pp->sp_lin;
 949                         break;
 950                 default:
 951                         return (ENODEV);
 952                 }
 953                 switch (cmd) {
 954                 case TIOCSETA:
 955                         error = suser(td);
 956                         if (error != 0)
 957                                 return (error);
 958                         *ct = *(struct termios *)data;
 959                         return (0);
 960                 case TIOCGETA:
 961                         *(struct termios *)data = *ct;
 962                         return (0);
 963                 case TIOCGETD:
 964                         *(int *)data = TTYDISC;
 965                         return (0);
 966                 case TIOCGWINSZ:
 967                         bzero(data, sizeof(struct winsize));
 968                         return (0);
 969                 default:
 970                         return (ENOTTY);
 971                 }
 972         }
 973         /*
 974          * Do the old-style ioctl compat routines...
 975          */
 976 #if defined(COMPAT_43)
 977         term = tp->t_termios;
 978         oldcmd = cmd;
 979         error = ttsetcompat(tp, &cmd, data, &term);
 980         if (error != 0)
 981                 return (error);
 982         if (cmd != oldcmd)
 983                 data = (caddr_t)&term;
 984 #endif
 985         /*
 986          * Do the initial / lock state business
 987          */
 988         if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
 989                 int     cc;
 990                 struct termios *dt = (struct termios *)data;
 991                 struct termios *lt = mynor & SI_CALLOUT_MASK
 992                                      ? &pp->sp_lout : &pp->sp_lin;
 993
 994                 dt->c_iflag = (tp->t_iflag & lt->c_iflag) |
 995                         (dt->c_iflag & ~lt->c_iflag);
 996                 dt->c_oflag = (tp->t_oflag & lt->c_oflag) |
 997                         (dt->c_oflag & ~lt->c_oflag);
 998                 dt->c_cflag = (tp->t_cflag & lt->c_cflag) |
 999                         (dt->c_cflag & ~lt->c_cflag);
1000                 dt->c_lflag = (tp->t_lflag & lt->c_lflag) |
1001                         (dt->c_lflag & ~lt->c_lflag);
1002                 for (cc = 0; cc < NCCS; ++cc)
1003                         if (lt->c_cc[cc] != 0)
1004                                 dt->c_cc[cc] = tp->t_cc[cc];
1005                 if (lt->c_ispeed != 0)
1006                         dt->c_ispeed = tp->t_ispeed;
1007                 if (lt->c_ospeed != 0)
1008                         dt->c_ospeed = tp->t_ospeed;
1009         }
1010
1011         /*
1012          * Block user-level writes to give the ttywait()
1013          * a chance to completely drain for commands
1014          * that require the port to be in a quiescent state.
1015          */
1016         switch (cmd) {
1017         case TIOCSETAW:
1018         case TIOCSETAF:
1019         case TIOCDRAIN:
1020 #ifdef COMPAT_43
1021         case TIOCSETP:
1022 #endif
1023                 blocked++;      /* block writes for ttywait() and siparam() */
1024                 si_write_enable(pp, 0);
1025         }
1026
1027         error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td);
1028         if (error != ENOIOCTL)
1029                 goto out;
1030
1031         oldspl = spltty();
1032
1033         error = ttioctl(tp, cmd, data, flag);
1034         si_disc_optim(tp, &tp->t_termios, pp);
1035         if (error != ENOIOCTL) {
1036                 splx(oldspl);
1037                 goto out;
1038         }
1039
1040         error = 0;
1041         switch (cmd) {
1042         case TIOCSBRK:
1043                 si_command(pp, SBREAK, SI_WAIT);
1044                 break;
1045         case TIOCCBRK:
1046                 si_command(pp, EBREAK, SI_WAIT);
1047                 break;
1048         case TIOCSDTR:
1049                 (void) si_modem(pp, SET, TIOCM_DTR|TIOCM_RTS);
1050                 break;
1051         case TIOCCDTR:
1052                 (void) si_modem(pp, SET, 0);
1053                 break;
1054         case TIOCMSET:
1055                 (void) si_modem(pp, SET, *(int *)data);
1056                 break;
1057         case TIOCMBIS:
1058                 (void) si_modem(pp, BIS, *(int *)data);
1059                 break;
1060         case TIOCMBIC:
1061                 (void) si_modem(pp, BIC, *(int *)data);
1062                 break;
1063         case TIOCMGET:
1064                 *(int *)data = si_modem(pp, GET, 0);
1065                 break;
1066         case TIOCMSDTRWAIT:
1067                 /* must be root since the wait applies to following logins */
1068                 error = suser(td);
1069                 if (error == 0)
1070                         pp->sp_dtr_wait = *(int *)data * hz / 100;
1071                 break;
1072         case TIOCMGDTRWAIT:
1073                 *(int *)data = pp->sp_dtr_wait * 100 / hz;
1074                 break;
1075         default:
1076                 error = ENOTTY;
1077         }
1078         splx(oldspl);
1079
1080 out:
1081         DPRINT((pp, DBG_IOCTL|DBG_EXIT, "siioctl ret %d\n", error));
1082         if (blocked)
1083                 si_write_enable(pp, 1);
1084         return(error);
1085 }
1086
1087 /*
1088  * Handle the Specialix ioctls. All MUST be called via the CONTROL device
1089  */
1090 static int
1091 si_Sioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
1092 {
1093         struct si_softc *xsc;
1094         struct si_port *xpp;
1095         volatile struct si_reg *regp;
1096         struct si_tcsi *dp;
1097         struct si_pstat *sps;
1098         int *ip, error = 0;
1099         int oldspl;
1100         int card, port;
1101         int mynor = minor(dev);
1102
1103         DPRINT((0, DBG_ENTRY|DBG_IOCTL, "si_Sioctl(%s,%lx,%x,%x)\n",
1104                 devtoname(dev), cmd, data, flag));
1105
1106 #if 1
1107         DPRINT((0, DBG_IOCTL, "TCSI_PORT=%x\n", TCSI_PORT));
1108         DPRINT((0, DBG_IOCTL, "TCSI_CCB=%x\n", TCSI_CCB));
1109         DPRINT((0, DBG_IOCTL, "TCSI_TTY=%x\n", TCSI_TTY));
1110 #endif
1111
1112         if (!IS_CONTROLDEV(mynor)) {
1113                 DPRINT((0, DBG_IOCTL|DBG_FAIL, "not called from control device!\n"));
1114                 return(ENODEV);
1115         }
1116
1117         oldspl = spltty();      /* better safe than sorry */
1118
1119         ip = (int *)data;
1120
1121 #define SUCHECK if ((error = suser(td))) goto out
1122
1123         switch (cmd) {
1124         case TCSIPORTS:
1125                 *ip = si_Nports;
1126                 goto out;
1127         case TCSIMODULES:
1128                 *ip = si_Nmodules;
1129                 goto out;
1130         case TCSISDBG_ALL:
1131                 SUCHECK;
1132                 si_debug = *ip;
1133                 goto out;
1134         case TCSIGDBG_ALL:
1135                 *ip = si_debug;
1136                 goto out;
1137         default:
1138                 /*
1139                  * Check that a controller for this port exists
1140                  */
1141
1142                 /* may also be a struct si_pstat, a superset of si_tcsi */
1143
1144                 dp = (struct si_tcsi *)data;
1145                 sps = (struct si_pstat *)data;
1146                 card = dp->tc_card;
1147                 xsc = devclass_get_softc(si_devclass, card);    /* check.. */
1148                 if (xsc == NULL || xsc->sc_type == SIEMPTY) {
1149                         error = ENOENT;
1150                         goto out;
1151                 }
1152                 /*
1153                  * And check that a port exists
1154                  */
1155                 port = dp->tc_port;
1156                 if (port < 0 || port >= xsc->sc_nport) {
1157                         error = ENOENT;
1158                         goto out;
1159                 }
1160                 xpp = xsc->sc_ports + port;
1161                 regp = (struct si_reg *)xsc->sc_maddr;
1162         }
1163
1164         switch (cmd) {
1165         case TCSIDEBUG:
1166 #ifdef  SI_DEBUG
1167                 SUCHECK;
1168                 if (xpp->sp_debug)
1169                         xpp->sp_debug = 0;
1170                 else {
1171                         xpp->sp_debug = DBG_ALL;
1172                         DPRINT((xpp, DBG_IOCTL, "debug toggled %s\n",
1173                                 (xpp->sp_debug&DBG_ALL)?"ON":"OFF"));
1174                 }
1175                 break;
1176 #else
1177                 error = ENODEV;
1178                 goto out;
1179 #endif
1180         case TCSISDBG_LEVEL:
1181         case TCSIGDBG_LEVEL:
1182 #ifdef  SI_DEBUG
1183                 if (cmd == TCSIGDBG_LEVEL) {
1184                         dp->tc_dbglvl = xpp->sp_debug;
1185                 } else {
1186                         SUCHECK;
1187                         xpp->sp_debug = dp->tc_dbglvl;
1188                 }
1189                 break;
1190 #else
1191                 error = ENODEV;
1192                 goto out;
1193 #endif
1194         case TCSIGRXIT:
1195                 dp->tc_int = regp->rx_int_count;
1196                 break;
1197         case TCSIRXIT:
1198                 SUCHECK;
1199                 regp->rx_int_count = dp->tc_int;
1200                 break;
1201         case TCSIGIT:
1202                 dp->tc_int = regp->int_count;
1203                 break;
1204         case TCSIIT:
1205                 SUCHECK;
1206                 regp->int_count = dp->tc_int;
1207                 break;
1208         case TCSISTATE:
1209                 dp->tc_int = xpp->sp_ccb->hi_ip;
1210                 break;
1211         /* these next three use a different structure */
1212         case TCSI_PORT:
1213                 SUCHECK;
1214                 si_bcopy(xpp, &sps->tc_siport, sizeof(sps->tc_siport));
1215                 break;
1216         case TCSI_CCB:
1217                 SUCHECK;
1218                 si_vbcopy(xpp->sp_ccb, &sps->tc_ccb, sizeof(sps->tc_ccb));
1219                 break;
1220         case TCSI_TTY:
1221                 SUCHECK;
1222                 si_bcopy(xpp->sp_tty, &sps->tc_tty, sizeof(sps->tc_tty));
1223                 break;
1224         default:
1225                 error = EINVAL;
1226                 goto out;
1227         }
1228 out:
1229         splx(oldspl);
1230         return(error);          /* success */
1231 }
1232
1233 /*
1234  *      siparam()       : Configure line params
1235  *      called at spltty();
1236  *      this may sleep, does not flush, nor wait for drain, nor block writes
1237  *      caller must arrange this if it's important..
1238  */
1239 static int
1240 siparam(struct tty *tp, struct termios *t)
1241 {
1242         struct si_port *pp = TP2PP(tp);
1243         volatile struct si_channel *ccbp;
1244         int oldspl, cflag, iflag, oflag, lflag;
1245         int error = 0;          /* shutup gcc */
1246         int ispeed = 0;         /* shutup gcc */
1247         int ospeed = 0;         /* shutup gcc */
1248         BYTE val;
1249
1250         DPRINT((pp, DBG_ENTRY|DBG_PARAM, "siparam(%x,%x)\n", tp, t));
1251         cflag = t->c_cflag;
1252         iflag = t->c_iflag;
1253         oflag = t->c_oflag;
1254         lflag = t->c_lflag;
1255         DPRINT((pp, DBG_PARAM, "OFLAG 0x%x CFLAG 0x%x IFLAG 0x%x LFLAG 0x%x\n",
1256                 oflag, cflag, iflag, lflag));
1257
1258         /* XXX - if Jet host and SXDC module, use extended baud rates */
1259
1260         /* if not hung up.. */
1261         if (t->c_ospeed != 0) {
1262                 /* translate baud rate to firmware values */
1263                 ospeed = ttspeedtab(t->c_ospeed, bdrates);
1264                 ispeed = t->c_ispeed ?
1265                          ttspeedtab(t->c_ispeed, bdrates) : ospeed;
1266
1267                 /* enforce legit baud rate */
1268                 if (ospeed < 0 || ispeed < 0)
1269                         return (EINVAL);
1270         }
1271
1272         oldspl = spltty();
1273
1274         ccbp = pp->sp_ccb;
1275
1276         /* ========== set hi_break ========== */
1277         val = 0;
1278         if (iflag & IGNBRK)             /* Breaks */
1279                 val |= BR_IGN;
1280         if (iflag & BRKINT)             /* Interrupt on break? */
1281                 val |= BR_INT;
1282         if (iflag & PARMRK)             /* Parity mark? */
1283                 val |= BR_PARMRK;
1284         if (iflag & IGNPAR)             /* Ignore chars with parity errors? */
1285                 val |= BR_PARIGN;
1286         ccbp->hi_break = val;
1287
1288         /* ========== set hi_csr ========== */
1289         /* if not hung up.. */
1290         if (t->c_ospeed != 0) {
1291                 /* Set I/O speeds */
1292                  val = (ispeed << 4) | ospeed;
1293         }
1294         ccbp->hi_csr = val;
1295
1296         /* ========== set hi_mr2 ========== */
1297         val = 0;
1298         if (cflag & CSTOPB)                             /* Stop bits */
1299                 val |= MR2_2_STOP;
1300         else
1301                 val |= MR2_1_STOP;
1302         /*
1303          * Enable H/W RTS/CTS handshaking. The default TA/MTA is
1304          * a DCE, hence the reverse sense of RTS and CTS
1305          */
1306         /* Output Flow - RTS must be raised before data can be sent */
1307         if (cflag & CCTS_OFLOW)
1308                 val |= MR2_RTSCONT;
1309
1310         ccbp->hi_mr2 = val;
1311
1312         /* ========== set hi_mr1 ========== */
1313         val = 0;
1314         if (!(cflag & PARENB))                          /* Parity */
1315                 val |= MR1_NONE;
1316         else
1317                 val |= MR1_WITH;
1318         if (cflag & PARODD)
1319                 val |= MR1_ODD;
1320
1321         if ((cflag & CS8) == CS8) {                     /* 8 data bits? */
1322                 val |= MR1_8_BITS;
1323         } else if ((cflag & CS7) == CS7) {              /* 7 data bits? */
1324                 val |= MR1_7_BITS;
1325         } else if ((cflag & CS6) == CS6) {              /* 6 data bits? */
1326                 val |= MR1_6_BITS;
1327         } else {                                        /* Must be 5 */
1328                 val |= MR1_5_BITS;
1329         }
1330         /*
1331          * Enable H/W RTS/CTS handshaking. The default TA/MTA is
1332          * a DCE, hence the reverse sense of RTS and CTS
1333          */
1334         /* Input Flow - CTS is raised when port is ready to receive data */
1335         if (cflag & CRTS_IFLOW)
1336                 val |= MR1_CTSCONT;
1337
1338         ccbp->hi_mr1 = val;
1339
1340         /* ========== set hi_mask ========== */
1341         val = 0xff;
1342         if ((cflag & CS8) == CS8) {                     /* 8 data bits? */
1343                 val &= 0xFF;
1344         } else if ((cflag & CS7) == CS7) {              /* 7 data bits? */
1345                 val &= 0x7F;
1346         } else if ((cflag & CS6) == CS6) {              /* 6 data bits? */
1347                 val &= 0x3F;
1348         } else {                                        /* Must be 5 */
1349                 val &= 0x1F;
1350         }
1351         if (iflag & ISTRIP)
1352                 val &= 0x7F;
1353
1354         ccbp->hi_mask = val;
1355
1356         /* ========== set hi_prtcl ========== */
1357         val = SP_DCEN;          /* Monitor DCD always, or TIOCMGET misses it */
1358         if (iflag & IXANY)
1359                 val |= SP_TANY;
1360         if (iflag & IXON)
1361                 val |= SP_TXEN;
1362         if (iflag & IXOFF)
1363                 val |= SP_RXEN;
1364         if (iflag & INPCK)
1365                 val |= SP_PAEN;
1366
1367         ccbp->hi_prtcl = val;
1368
1369
1370         /* ========== set hi_{rx|tx}{on|off} ========== */
1371         /* XXX: the card TOTALLY shields us from the flow control... */
1372         ccbp->hi_txon = t->c_cc[VSTART];
1373         ccbp->hi_txoff = t->c_cc[VSTOP];
1374
1375         ccbp->hi_rxon = t->c_cc[VSTART];
1376         ccbp->hi_rxoff = t->c_cc[VSTOP];
1377
1378         /* ========== send settings to the card ========== */
1379         /* potential sleep here */
1380         if (ccbp->hi_stat == IDLE_CLOSE)                /* Not yet open */
1381                 si_command(pp, LOPEN, SI_WAIT);         /* open it */
1382         else
1383                 si_command(pp, CONFIG, SI_WAIT);        /* change params */
1384
1385         /* ========== set DTR etc ========== */
1386         /* Hangup if ospeed == 0 */
1387         if (t->c_ospeed == 0) {
1388                 (void) si_modem(pp, BIC, TIOCM_DTR|TIOCM_RTS);
1389         } else {
1390                 /*
1391                  * If the previous speed was 0, may need to re-enable
1392                  * the modem signals
1393                  */
1394                 (void) si_modem(pp, SET, TIOCM_DTR|TIOCM_RTS);
1395         }
1396
1397         DPRINT((pp, DBG_PARAM, "siparam, complete: MR1 %x MR2 %x HI_MASK %x PRTCL %x HI_BREAK %x\n",
1398                 ccbp->hi_mr1, ccbp->hi_mr2, ccbp->hi_mask, ccbp->hi_prtcl, ccbp->hi_break));
1399
1400         splx(oldspl);
1401         return(error);
1402 }
1403
1404 /*
1405  * Enable or Disable the writes to this channel...
1406  * "state" ->  enabled = 1; disabled = 0;
1407  */
1408 static void
1409 si_write_enable(struct si_port *pp, int state)
1410 {
1411         int oldspl;
1412
1413         oldspl = spltty();
1414
1415         if (state) {
1416                 pp->sp_state &= ~SS_BLOCKWRITE;
1417                 if (pp->sp_state & SS_WAITWRITE) {
1418                         pp->sp_state &= ~SS_WAITWRITE;
1419                         /* thunder away! */
1420                         wakeup((caddr_t)pp);
1421                 }
1422         } else {
1423                 pp->sp_state |= SS_BLOCKWRITE;
1424         }
1425
1426         splx(oldspl);
1427 }
1428
1429 /*
1430  * Set/Get state of modem control lines.
1431  * Due to DCE-like behaviour of the adapter, some signals need translation:
1432  *      TIOCM_DTR       DSR
1433  *      TIOCM_RTS       CTS
1434  */
1435 static int
1436 si_modem(struct si_port *pp, enum si_mctl cmd, int bits)
1437 {
1438         volatile struct si_channel *ccbp;
1439         int x;
1440
1441         DPRINT((pp, DBG_ENTRY|DBG_MODEM, "si_modem(%x,%s,%x)\n", pp, si_mctl2str(cmd), bits));
1442         ccbp = pp->sp_ccb;              /* Find channel address */
1443         switch (cmd) {
1444         case GET:
1445                 x = ccbp->hi_ip;
1446                 bits = TIOCM_LE;
1447                 if (x & IP_DCD)         bits |= TIOCM_CAR;
1448                 if (x & IP_DTR)         bits |= TIOCM_DTR;
1449                 if (x & IP_RTS)         bits |= TIOCM_RTS;
1450                 if (x & IP_RI)          bits |= TIOCM_RI;
1451                 return(bits);
1452         case SET:
1453                 ccbp->hi_op &= ~(OP_DSR|OP_CTS);
1454                 /* fall through */
1455         case BIS:
1456                 x = 0;
1457                 if (bits & TIOCM_DTR)
1458                         x |= OP_DSR;
1459                 if (bits & TIOCM_RTS)
1460                         x |= OP_CTS;
1461                 ccbp->hi_op |= x;
1462                 break;
1463         case BIC:
1464                 if (bits & TIOCM_DTR)
1465                         ccbp->hi_op &= ~OP_DSR;
1466                 if (bits & TIOCM_RTS)
1467                         ccbp->hi_op &= ~OP_CTS;
1468         }
1469         return 0;
1470 }
1471
1472 /*
1473  * Handle change of modem state
1474  */
1475 static void
1476 si_modem_state(struct si_port *pp, struct tty *tp, int hi_ip)
1477 {
1478                                                         /* if a modem dev */
1479         if (hi_ip & IP_DCD) {
1480                 if (!(pp->sp_last_hi_ip & IP_DCD)) {
1481                         DPRINT((pp, DBG_INTR, "modem carr on t_line %d\n",
1482                                 tp->t_line));
1483                         (void)(*linesw[tp->t_line].l_modem)(tp, 1);
1484                 }
1485         } else {
1486                 if (pp->sp_last_hi_ip & IP_DCD) {
1487                         DPRINT((pp, DBG_INTR, "modem carr off\n"));
1488                         if ((*linesw[tp->t_line].l_modem)(tp, 0))
1489                                 (void) si_modem(pp, SET, 0);
1490                 }
1491         }
1492         pp->sp_last_hi_ip = hi_ip;
1493
1494 }
1495
1496 /*
1497  * Poller to catch missed interrupts.
1498  *
1499  * Note that the SYSV Specialix drivers poll at 100 times per second to get
1500  * better response.  We could really use a "periodic" version timeout(). :-)
1501  */
1502 #ifdef POLL
1503 static void
1504 si_poll(void *nothing)
1505 {
1506         struct si_softc *sc;
1507         int i;
1508         volatile struct si_reg *regp;
1509         struct si_port *pp;
1510         int lost, oldspl, port;
1511
1512         DPRINT((0, DBG_POLL, "si_poll()\n"));
1513         oldspl = spltty();
1514         if (in_intr)
1515                 goto out;
1516         lost = 0;
1517         for (i = 0; i < si_numunits; i++) {
1518                 sc = devclass_get_softc(si_devclass, i);
1519                 if (sc == NULL || sc->sc_type == SIEMPTY)
1520                         continue;
1521                 regp = (struct si_reg *)sc->sc_maddr;
1522
1523                 /*
1524                  * See if there has been a pending interrupt for 2 seconds
1525                  * or so. The test (int_scounter >= 200) won't correspond
1526                  * to 2 seconds if int_count gets changed.
1527                  */
1528                 if (regp->int_pending != 0) {
1529                         if (regp->int_scounter >= 200 &&
1530                             regp->initstat == 1) {
1531                                 printf("si%d: lost intr\n", i);
1532                                 lost++;
1533                         }
1534                 } else {
1535                         regp->int_scounter = 0;
1536                 }
1537
1538                 /*
1539                  * gripe about no input flow control..
1540                  */
1541                 pp = sc->sc_ports;
1542                 for (port = 0; port < sc->sc_nport; pp++, port++) {
1543                         if (pp->sp_delta_overflows > 0) {
1544                                 printf("si%d: %d tty level buffer overflows\n",
1545                                         i, pp->sp_delta_overflows);
1546                                 pp->sp_delta_overflows = 0;
1547                         }
1548                 }
1549         }
1550         if (lost || si_realpoll)
1551                 si_intr(NULL);  /* call intr with fake vector */
1552 out:
1553         splx(oldspl);
1554
1555         timeout(si_poll, (caddr_t)0L, si_pollrate);
1556 }
1557 #endif  /* ifdef POLL */
1558
1559 /*
1560  * The interrupt handler polls ALL ports on ALL adapters each time
1561  * it is called.
1562  */
1563
1564 static BYTE si_rxbuf[SI_BUFFERSIZE];    /* input staging area */
1565 static BYTE si_txbuf[SI_BUFFERSIZE];    /* output staging area */
1566
1567 void
1568 si_intr(void *arg)
1569 {
1570         struct si_softc *sc;
1571         struct si_port *pp;
1572         volatile struct si_channel *ccbp;
1573         struct tty *tp;
1574         volatile caddr_t maddr;
1575         BYTE op, ip;
1576         int x, card, port, n, i, isopen;
1577         volatile BYTE *z;
1578         BYTE c;
1579
1580         sc = arg;
1581
1582         DPRINT((0, arg == NULL ? DBG_POLL:DBG_INTR, "si_intr\n"));
1583         if (in_intr)
1584                 return;
1585         in_intr = 1;
1586
1587         /*
1588          * When we get an int we poll all the channels and do ALL pending
1589          * work, not just the first one we find. This allows all cards to
1590          * share the same vector.
1591          *
1592          * XXX - But if we're sharing the vector with something that's NOT
1593          * a SI/XIO/SX card, we may be making more work for ourselves.
1594          */
1595         for (card = 0; card < si_numunits; card++) {
1596                 sc = devclass_get_softc(si_devclass, card);
1597                 if (sc == NULL || sc->sc_type == SIEMPTY)
1598                         continue;
1599
1600                 /*
1601                  * First, clear the interrupt
1602                  */
1603                 switch(sc->sc_type) {
1604                 case SIHOST:
1605                         maddr = sc->sc_maddr;
1606                         ((volatile struct si_reg *)maddr)->int_pending = 0;
1607                                                         /* flag nothing pending */
1608                         *(maddr+SIINTCL) = 0x00;        /* Set IRQ clear */
1609                         *(maddr+SIINTCL_CL) = 0x00;     /* Clear IRQ clear */
1610                         break;
1611                 case SIHOST2:
1612                         maddr = sc->sc_maddr;
1613                         ((volatile struct si_reg *)maddr)->int_pending = 0;
1614                         *(maddr+SIPLIRQCLR) = 0x00;
1615                         *(maddr+SIPLIRQCLR) = 0x10;
1616                         break;
1617                 case SIPCI:
1618                         maddr = sc->sc_maddr;
1619                         ((volatile struct si_reg *)maddr)->int_pending = 0;
1620                         *(maddr+SIPCIINTCL) = 0x0;
1621                         break;
1622                 case SIJETPCI:  /* fall through to JETISA case */
1623                 case SIJETISA:
1624                         maddr = sc->sc_maddr;
1625                         ((volatile struct si_reg *)maddr)->int_pending = 0;
1626                         *(maddr+SIJETINTCL) = 0x0;
1627                         break;
1628                 case SIEISA:
1629                         maddr = sc->sc_maddr;
1630                         ((volatile struct si_reg *)maddr)->int_pending = 0;
1631                         (void)inb(sc->sc_iobase + 3);
1632                         break;
1633                 case SIEMPTY:
1634                 default:
1635                         continue;
1636                 }
1637                 ((volatile struct si_reg *)maddr)->int_scounter = 0;
1638
1639                 /*
1640                  * check each port
1641                  */
1642                 for (pp = sc->sc_ports, port = 0; port < sc->sc_nport;
1643                      pp++, port++) {
1644                         ccbp = pp->sp_ccb;
1645                         tp = pp->sp_tty;
1646
1647                         /*
1648                          * See if a command has completed ?
1649                          */
1650                         if (ccbp->hi_stat != pp->sp_pend) {
1651                                 DPRINT((pp, DBG_INTR,
1652                                         "si_intr hi_stat = 0x%x, pend = %d\n",
1653                                         ccbp->hi_stat, pp->sp_pend));
1654                                 switch(pp->sp_pend) {
1655                                 case LOPEN:
1656                                 case MPEND:
1657                                 case MOPEN:
1658                                 case CONFIG:
1659                                 case SBREAK:
1660                                 case EBREAK:
1661                                         pp->sp_pend = ccbp->hi_stat;
1662                                                 /* sleeping in si_command */
1663                                         wakeup(&pp->sp_state);
1664                                         break;
1665                                 default:
1666                                         pp->sp_pend = ccbp->hi_stat;
1667                                 }
1668                         }
1669
1670                         /*
1671                          * Continue on if it's closed
1672                          */
1673                         if (ccbp->hi_stat == IDLE_CLOSE) {
1674                                 continue;
1675                         }
1676
1677                         /*
1678                          * Do modem state change if not a local device
1679                          */
1680                         si_modem_state(pp, tp, ccbp->hi_ip);
1681
1682                         /*
1683                          * Check to see if we should 'receive' characters.
1684                          */
1685                         if (tp->t_state & TS_CONNECTED &&
1686                             tp->t_state & TS_ISOPEN)
1687                                 isopen = 1;
1688                         else
1689                                 isopen = 0;
1690
1691                         /*
1692                          * Do input break processing
1693                          */
1694                         if (ccbp->hi_state & ST_BREAK) {
1695                                 if (isopen) {
1696                                     (*linesw[tp->t_line].l_rint)(TTY_BI, tp);
1697                                 }
1698                                 ccbp->hi_state &= ~ST_BREAK;   /* A Bit iffy this */
1699                                 DPRINT((pp, DBG_INTR, "si_intr break\n"));
1700                         }
1701
1702                         /*
1703                          * Do RX stuff - if not open then dump any characters.
1704                          * XXX: This is VERY messy and needs to be cleaned up.
1705                          *
1706                          * XXX: can we leave data in the host adapter buffer
1707                          * when the clists are full?  That may be dangerous
1708                          * if the user cannot get an interrupt signal through.
1709                          */
1710
1711         more_rx:        /* XXX Sorry. the nesting was driving me bats! :-( */
1712
1713                         if (!isopen) {
1714                                 ccbp->hi_rxopos = ccbp->hi_rxipos;
1715                                 goto end_rx;
1716                         }
1717
1718                         /*
1719                          * If the tty input buffers are blocked, stop emptying
1720                          * the incoming buffers and let the auto flow control
1721                          * assert..
1722                          */
1723                         if (tp->t_state & TS_TBLOCK) {
1724                                 goto end_rx;
1725                         }
1726
1727                         /*
1728                          * Process read characters if not skipped above
1729                          */
1730                         op = ccbp->hi_rxopos;
1731                         ip = ccbp->hi_rxipos;
1732                         c = ip - op;
1733                         if (c == 0) {
1734                                 goto end_rx;
1735                         }
1736
1737                         n = c & 0xff;
1738                         if (n > 250)
1739                                 n = 250;
1740
1741                         DPRINT((pp, DBG_INTR, "n = %d, op = %d, ip = %d\n",
1742                                                 n, op, ip));
1743
1744                         /*
1745                          * Suck characters out of host card buffer into the
1746                          * "input staging buffer" - so that we dont leave the
1747                          * host card in limbo while we're possibly echoing
1748                          * characters and possibly flushing input inside the
1749                          * ldisc l_rint() routine.
1750                          */
1751                         if (n <= SI_BUFFERSIZE - op) {
1752
1753                                 DPRINT((pp, DBG_INTR, "\tsingle copy\n"));
1754                                 z = ccbp->hi_rxbuf + op;
1755                                 si_vbcopy(z, si_rxbuf, n);
1756
1757                                 op += n;
1758                         } else {
1759                                 x = SI_BUFFERSIZE - op;
1760
1761                                 DPRINT((pp, DBG_INTR, "\tdouble part 1 %d\n", x));
1762                                 z = ccbp->hi_rxbuf + op;
1763                                 si_vbcopy(z, si_rxbuf, x);
1764
1765                                 DPRINT((pp, DBG_INTR, "\tdouble part 2 %d\n",
1766                                         n - x));
1767                                 z = ccbp->hi_rxbuf;
1768                                 si_vbcopy(z, si_rxbuf + x, n - x);
1769
1770                                 op += n;
1771                         }
1772
1773                         /* clear collected characters from buffer */
1774                         ccbp->hi_rxopos = op;
1775
1776                         DPRINT((pp, DBG_INTR, "n = %d, op = %d, ip = %d\n",
1777                                                 n, op, ip));
1778
1779                         /*
1780                          * at this point...
1781                          * n = number of chars placed in si_rxbuf
1782                          */
1783
1784                         /*
1785                          * Avoid the grotesquely inefficient lineswitch
1786                          * routine (ttyinput) in "raw" mode. It usually
1787                          * takes about 450 instructions (that's without
1788                          * canonical processing or echo!). slinput is
1789                          * reasonably fast (usually 40 instructions
1790                          * plus call overhead).
1791                          */
1792                         if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
1793
1794                                 /* block if the driver supports it */
1795                                 if (tp->t_rawq.c_cc + n >= SI_I_HIGH_WATER &&
1796                                     (tp->t_cflag & CRTS_IFLOW ||
1797                                      tp->t_iflag & IXOFF) &&
1798                                     !(tp->t_state & TS_TBLOCK))
1799                                         ttyblock(tp);
1800
1801                                 tk_nin += n;
1802                                 tk_rawcc += n;
1803                                 tp->t_rawcc += n;
1804
1805                                 pp->sp_delta_overflows +=
1806                                     b_to_q((char *)si_rxbuf, n, &tp->t_rawq);
1807
1808                                 ttwakeup(tp);
1809                                 if (tp->t_state & TS_TTSTOP &&
1810                                     (tp->t_iflag & IXANY ||
1811                                      tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
1812                                         tp->t_state &= ~TS_TTSTOP;
1813                                         tp->t_lflag &= ~FLUSHO;
1814                                         si_start(tp);
1815                                 }
1816                         } else {
1817                                 /*
1818                                  * It'd be nice to not have to go through the
1819                                  * function call overhead for each char here.
1820                                  * It'd be nice to block input it, saving a
1821                                  * loop here and the call/return overhead.
1822                                  */
1823                                 for(x = 0; x < n; x++) {
1824                                         i = si_rxbuf[x];
1825                                         if ((*linesw[tp->t_line].l_rint)(i, tp)
1826                                              == -1) {
1827                                                 pp->sp_delta_overflows++;
1828                                         }
1829                                 }
1830                         }
1831                         goto more_rx;   /* try for more until RXbuf is empty */
1832
1833         end_rx:         /* XXX: Again, sorry about the gotos.. :-) */
1834
1835                         /*
1836                          * Do TX stuff
1837                          */
1838                         (*linesw[tp->t_line].l_start)(tp);
1839
1840                 } /* end of for (all ports on this controller) */
1841         } /* end of for (all controllers) */
1842
1843         in_intr = 0;
1844         DPRINT((0, arg == NULL ? DBG_POLL:DBG_INTR, "end si_intr\n"));
1845 }
1846
1847 /*
1848  * Nudge the transmitter...
1849  *
1850  * XXX: I inherited some funny code here.  It implies the host card only
1851  * interrupts when the transmit buffer reaches the low-water-mark, and does
1852  * not interrupt when it's actually hits empty.  In some cases, we have
1853  * processes waiting for complete drain, and we need to simulate an interrupt
1854  * about when we think the buffer is going to be empty (and retry if not).
1855  * I really am not certain about this...  I *need* the hardware manuals.
1856  */
1857 static void
1858 si_start(struct tty *tp)
1859 {
1860         struct si_port *pp;
1861         volatile struct si_channel *ccbp;
1862         struct clist *qp;
1863         BYTE ipos;
1864         int nchar;
1865         int oldspl, count, n, amount, buffer_full;
1866
1867         oldspl = spltty();
1868
1869         qp = &tp->t_outq;
1870         pp = TP2PP(tp);
1871
1872         DPRINT((pp, DBG_ENTRY|DBG_START,
1873                 "si_start(%x) t_state %x sp_state %x t_outq.c_cc %d\n",
1874                 tp, tp->t_state, pp->sp_state, qp->c_cc));
1875
1876         if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP))
1877                 goto out;
1878
1879         buffer_full = 0;
1880         ccbp = pp->sp_ccb;
1881
1882         count = (int)ccbp->hi_txipos - (int)ccbp->hi_txopos;
1883         DPRINT((pp, DBG_START, "count %d\n", (BYTE)count));
1884
1885         while ((nchar = qp->c_cc) > 0) {
1886                 if ((BYTE)count >= 255) {
1887                         buffer_full++;
1888                         break;
1889                 }
1890                 amount = min(nchar, (255 - (BYTE)count));
1891                 ipos = (unsigned int)ccbp->hi_txipos;
1892                 n = q_to_b(&tp->t_outq, si_txbuf, amount);
1893                 /* will it fit in one lump? */
1894                 if ((SI_BUFFERSIZE - ipos) >= n) {
1895                         si_bcopyv(si_txbuf, &ccbp->hi_txbuf[ipos], n);
1896                 } else {
1897                         si_bcopyv(si_txbuf, &ccbp->hi_txbuf[ipos],
1898                                 SI_BUFFERSIZE - ipos);
1899                         si_bcopyv(si_txbuf + (SI_BUFFERSIZE - ipos),
1900                                 &ccbp->hi_txbuf[0], n - (SI_BUFFERSIZE - ipos));
1901                 }
1902                 ccbp->hi_txipos += n;
1903                 count = (int)ccbp->hi_txipos - (int)ccbp->hi_txopos;
1904         }
1905
1906         if (count != 0 && nchar == 0) {
1907                 tp->t_state |= TS_BUSY;
1908         } else {
1909                 tp->t_state &= ~TS_BUSY;
1910         }
1911
1912         /* wakeup time? */
1913         ttwwakeup(tp);
1914
1915         DPRINT((pp, DBG_START, "count %d, nchar %d, tp->t_state 0x%x\n",
1916                 (BYTE)count, nchar, tp->t_state));
1917
1918         if (tp->t_state & TS_BUSY)
1919         {
1920                 int time;
1921
1922                 time = ttspeedtab(tp->t_ospeed, chartimes);
1923
1924                 if (time > 0) {
1925                         if (time < nchar)
1926                                 time = nchar / time;
1927                         else
1928                                 time = 2;
1929                 } else {
1930                         DPRINT((pp, DBG_START,
1931                                 "bad char time value! %d\n", time));
1932                         time = hz/10;
1933                 }
1934
1935                 if ((pp->sp_state & (SS_LSTART|SS_INLSTART)) == SS_LSTART) {
1936                         untimeout(si_lstart, (caddr_t)pp, pp->lstart_ch);
1937                 } else {
1938                         pp->sp_state |= SS_LSTART;
1939                 }
1940                 DPRINT((pp, DBG_START, "arming lstart, time=%d\n", time));
1941                 pp->lstart_ch = timeout(si_lstart, (caddr_t)pp, time);
1942         }
1943
1944 out:
1945         splx(oldspl);
1946         DPRINT((pp, DBG_EXIT|DBG_START, "leave si_start()\n"));
1947 }
1948
1949 /*
1950  * Note: called at splsoftclock from the timeout code
1951  * This has to deal with two things...  cause wakeups while waiting for
1952  * tty drains on last process exit, and call l_start at about the right
1953  * time for protocols like ppp.
1954  */
1955 static void
1956 si_lstart(void *arg)
1957 {
1958         struct si_port *pp = arg;
1959         struct tty *tp;
1960         int oldspl;
1961
1962         DPRINT((pp, DBG_ENTRY|DBG_LSTART, "si_lstart(%x) sp_state %x\n",
1963                 pp, pp->sp_state));
1964
1965         oldspl = spltty();
1966
1967         if ((pp->sp_state & SS_OPEN) == 0 || (pp->sp_state & SS_LSTART) == 0) {
1968                 splx(oldspl);
1969                 return;
1970         }
1971         pp->sp_state &= ~SS_LSTART;
1972         pp->sp_state |= SS_INLSTART;
1973
1974         tp = pp->sp_tty;
1975
1976         /* deal with the process exit case */
1977         ttwwakeup(tp);
1978
1979         /* nudge protocols - eg: ppp */
1980         (*linesw[tp->t_line].l_start)(tp);
1981
1982         pp->sp_state &= ~SS_INLSTART;
1983         splx(oldspl);
1984 }
1985
1986 /*
1987  * Stop output on a line. called at spltty();
1988  */
1989 void
1990 si_stop(struct tty *tp, int rw)
1991 {
1992         volatile struct si_channel *ccbp;
1993         struct si_port *pp;
1994
1995         pp = TP2PP(tp);
1996         ccbp = pp->sp_ccb;
1997
1998         DPRINT((TP2PP(tp), DBG_ENTRY|DBG_STOP, "si_stop(%x,%x)\n", tp, rw));
1999
2000         /* XXX: must check (rw & FWRITE | FREAD) etc flushing... */
2001         if (rw & FWRITE) {
2002                 /* what level are we meant to be flushing anyway? */
2003                 if (tp->t_state & TS_BUSY) {
2004                         si_command(TP2PP(tp), WFLUSH, SI_NOWAIT);
2005                         tp->t_state &= ~TS_BUSY;
2006                         ttwwakeup(tp);  /* Bruce???? */
2007                 }
2008         }
2009 #if 1   /* XXX: this doesn't work right yet.. */
2010         /* XXX: this may have been failing because we used to call l_rint()
2011          * while we were looping based on these two counters. Now, we collect
2012          * the data and then loop stuffing it into l_rint(), making this
2013          * useless.  Should we cause this to blow away the staging buffer?
2014          */
2015         if (rw & FREAD) {
2016                 ccbp->hi_rxopos = ccbp->hi_rxipos;
2017         }
2018 #endif
2019 }
2020
2021 /*
2022  * Issue a command to the host card CPU.
2023  */
2024
2025 static void
2026 si_command(struct si_port *pp, int cmd, int waitflag)
2027 {
2028         int oldspl;
2029         volatile struct si_channel *ccbp = pp->sp_ccb;
2030         int x;
2031
2032         DPRINT((pp, DBG_ENTRY|DBG_PARAM, "si_command(%x,%x,%d): hi_stat 0x%x\n",
2033                 pp, cmd, waitflag, ccbp->hi_stat));
2034
2035         oldspl = spltty();              /* Keep others out */
2036
2037         /* wait until it's finished what it was doing.. */
2038         /* XXX: sits in IDLE_BREAK until something disturbs it or break
2039          * is turned off. */
2040         while((x = ccbp->hi_stat) != IDLE_OPEN &&
2041                         x != IDLE_CLOSE &&
2042                         x != IDLE_BREAK &&
2043                         x != cmd) {
2044                 if (in_intr) {                  /* Prevent sleep in intr */
2045                         DPRINT((pp, DBG_PARAM,
2046                                 "cmd intr collision - completing %d\trequested %d\n",
2047                                 x, cmd));
2048                         splx(oldspl);
2049                         return;
2050                 } else if (ttysleep(pp->sp_tty, (caddr_t)&pp->sp_state, TTIPRI|PCATCH,
2051                                 "sicmd1", 1)) {
2052                         splx(oldspl);
2053                         return;
2054                 }
2055         }
2056         /* it should now be in IDLE_{OPEN|CLOSE|BREAK}, or "cmd" */
2057
2058         /* if there was a pending command, cause a state-change wakeup */
2059         switch(pp->sp_pend) {
2060         case LOPEN:
2061         case MPEND:
2062         case MOPEN:
2063         case CONFIG:
2064         case SBREAK:
2065         case EBREAK:
2066                 wakeup(&pp->sp_state);
2067                 break;
2068         default:
2069                 break;
2070         }
2071
2072         pp->sp_pend = cmd;              /* New command pending */
2073         ccbp->hi_stat = cmd;            /* Post it */
2074
2075         if (waitflag) {
2076                 if (in_intr) {          /* If in interrupt handler */
2077                         DPRINT((pp, DBG_PARAM,
2078                                 "attempt to sleep in si_intr - cmd req %d\n",
2079                                 cmd));
2080                         splx(oldspl);
2081                         return;
2082                 } else while(ccbp->hi_stat != IDLE_OPEN &&
2083                              ccbp->hi_stat != IDLE_BREAK) {
2084                         if (ttysleep(pp->sp_tty, (caddr_t)&pp->sp_state, TTIPRI|PCATCH,
2085                             "sicmd2", 0))
2086                                 break;
2087                 }
2088         }
2089         splx(oldspl);
2090 }
2091
2092 static void
2093 si_disc_optim(struct tty *tp, struct termios *t, struct si_port *pp)
2094 {
2095         /*
2096          * XXX can skip a lot more cases if Smarts.  Maybe
2097          * (IGNCR | ISTRIP | IXON) in c_iflag.  But perhaps we
2098          * shouldn't skip if (TS_CNTTB | TS_LNCH) is set in t_state.
2099          */
2100         if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) &&
2101             (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) &&
2102             (!(t->c_iflag & PARMRK) ||
2103              (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) &&
2104             !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) &&
2105             linesw[tp->t_line].l_rint == ttyinput)
2106                 tp->t_state |= TS_CAN_BYPASS_L_RINT;
2107         else
2108                 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
2109         pp->sp_hotchar = linesw[tp->t_line].l_hotchar;
2110         DPRINT((pp, DBG_OPTIM, "bypass: %s, hotchar: %x\n",
2111                 (tp->t_state & TS_CAN_BYPASS_L_RINT) ? "on" : "off",
2112                 pp->sp_hotchar));
2113 }
2114
2115
2116 #ifdef  SI_DEBUG
2117
2118 void
2119 si_dprintf(struct si_port *pp, int flags, const char *fmt, ...)
2120 {
2121         va_list ap;
2122
2123         if ((pp == NULL && (si_debug&flags)) ||
2124             (pp != NULL && ((pp->sp_debug&flags) || (si_debug&flags)))) {
2125                 if (pp != NULL)
2126                         printf("%ci%d(%d): ", 's',
2127                                 (int)SI_CARD(minor(pp->sp_tty->t_dev)),
2128                                 (int)SI_PORT(minor(pp->sp_tty->t_dev)));
2129                 va_start(ap, fmt);
2130                 vprintf(fmt, ap);
2131                 va_end(ap);
2132         }
2133 }
2134
2135 static char *
2136 si_mctl2str(enum si_mctl cmd)
2137 {
2138         switch (cmd) {
2139         case GET:
2140                 return("GET");
2141         case SET:
2142                 return("SET");
2143         case BIS:
2144                 return("BIS");
2145         case BIC:
2146                 return("BIC");
2147         }
2148         return("BAD");
2149 }
2150
2151 #endif  /* DEBUG */
2152
2153 static char *
2154 si_modulename(int host_type, int uart_type)
2155 {
2156         switch (host_type) {
2157         /* Z280 based cards */
2158         case SIEISA:
2159         case SIHOST2:
2160         case SIHOST:
2161         case SIPCI:
2162                 switch (uart_type) {
2163                 case 0:
2164                         return(" (XIO)");
2165                 case 1:
2166                         return(" (SI)");
2167                 }
2168                 break;
2169         /* T225 based hosts */
2170         case SIJETPCI:
2171         case SIJETISA:
2172                 switch (uart_type) {
2173                 case 0:
2174                         return(" (SI)");
2175                 case 40:
2176                         return(" (XIO)");
2177                 case 72:
2178                         return(" (SXDC)");
2179                 }
2180                 break;
2181         }
2182         return("");
2183 }