msc.c revision 1.15
1 /* $NetBSD: msc.c,v 1.15 1998/09/01 02:33:32 mhitch Exp $ */ 2 3 /* 4 * Copyright (c) 1993 Zik. 5 * Copyright (c) 1995 Jukka Marin <jmarin (at) jmp.fi>. 6 * Copyright (c) 1995 Timo Rossi <trossi (at) jyu.fi>. 7 * Copyright (c) 1995 Rob Healey <rhealey (at) kas.helios.mn.org>. 8 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 9 * All rights reserved. 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 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, 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 the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * - converted from NetBSD Amiga serial driver to A2232 serial driver 40 * by zik 931207 41 * - added ttyflags hooks rfh 940419 42 * - added new style config support rfh 940601 43 * - added code to halt board during memory load so board doesn't flip 44 * out. /dev/reload works now. Also created mschwiflow function so BSD can 45 * attempt to use board RTS flow control now. rfh 950108 46 * - Integrated work from Jukka Marin <jmarin (at) jmp.fi> and 47 * Timo Rossi <trossi (at) jyu.fi> The mscmint() code is Jukka's. 950916 48 * Integrated more bug fixes by Jukka Marin <jmarin (at) jmp.fi> 950918 49 * Also added Jukka's turbo board code. 950918 50 * - Reformatted to NetBSD style format. 51 * - Rewritten the carrier detect system to prevent lock-ups (jm 951029) 52 */ 53 54 #include "msc.h" 55 56 #if NMSC > 0 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/ioctl.h> 60 #include <sys/tty.h> 61 #include <sys/proc.h> 62 #include <sys/file.h> 63 #include <sys/malloc.h> 64 #include <sys/uio.h> 65 #include <sys/kernel.h> 66 #include <sys/syslog.h> 67 #include <sys/device.h> 68 69 #include <amiga/amiga/device.h> 70 #include <amiga/dev/zbusvar.h> 71 #include <amiga/dev/mscreg.h> 72 #include <machine/cpu.h> 73 74 #include <amiga/amiga/custom.h> 75 #include <amiga/amiga/cia.h> 76 #include <amiga/amiga/cc.h> 77 78 #include <sys/conf.h> 79 #include <machine/conf.h> 80 81 /* 6502 code for A2232 card */ 82 #include "msc6502.h" 83 84 /* 85 * Note: These are Zik's original comments: 86 * There is a bit of a "gotcha" concerning the numbering 87 * of msc devices and the specification of the number of serial 88 * lines in the kernel. 89 * 90 * Each board has seven lines, but for programming convenience 91 * and compatibility with Amiga UNIX the boards' minor device 92 * numbers are allocated in groups of sixteen: 93 * 94 * minor device numbers 95 * First board 0 2 4 6 8 10 12 96 * Second board 16 18 20 22 24 26 28 97 * Third board 32 34 36 38 40 42 44 98 * 99 * The intermediate minor device numbers are dialin versions 100 * of the same devices. ie. 10 is dialout line 6 and 11 is 101 * the dialin version of line 6. 102 * 103 * On the other hand, I have made the NMSC config option refer 104 * to the total number of a2232 cards, not the maximum 105 * minor device number. So you might have NMSC=3, in which case 106 * you have three boards with minor device numbers from 0 to 45. 107 */ 108 109 int mscparam __P((struct tty *, struct termios *)); 110 void mscstart __P((struct tty *)); 111 int mschwiflow __P((struct tty *, int)); 112 int mscinitcard __P((struct zbus_args *)); 113 114 int mscdefaultrate = TTYDEF_SPEED; 115 116 struct mscdevice mscdev[MSCSLOTS]; /* device structs for all lines */ 117 struct tty *msc_tty[MSCTTYS]; /* ttys for all lines */ 118 119 struct vbl_node msc_vbl_node[NMSC]; /* vbl interrupt node per board */ 120 121 struct speedtab mscspeedtab_normal[] = { 122 { 0, 0 }, 123 { 50, MSCPARAM_B50 }, 124 { 75, MSCPARAM_B75 }, 125 { 110, MSCPARAM_B110 }, 126 { 134, MSCPARAM_B134 }, 127 { 150, MSCPARAM_B150 }, 128 { 300, MSCPARAM_B300 }, 129 { 600, MSCPARAM_B600 }, 130 { 1200, MSCPARAM_B1200 }, 131 { 1800, MSCPARAM_B1800 }, 132 { 2400, MSCPARAM_B2400 }, 133 { 3600, MSCPARAM_B3600 }, 134 { 4800, MSCPARAM_B4800 }, 135 { 7200, MSCPARAM_B7200 }, 136 { 9600, MSCPARAM_B9600 }, 137 { 19200, MSCPARAM_B19200 }, 138 { 115200, MSCPARAM_B115200 }, 139 { -1, -1 } 140 }; 141 142 struct speedtab mscspeedtab_turbo[] = { 143 { 0, 0 }, 144 { 100, MSCPARAM_B50 }, 145 { 150, MSCPARAM_B75 }, 146 { 220, MSCPARAM_B110 }, 147 { 269, MSCPARAM_B134 }, 148 { 300, MSCPARAM_B150 }, 149 { 600, MSCPARAM_B300 }, 150 { 1200, MSCPARAM_B600 }, 151 { 2400, MSCPARAM_B1200 }, 152 { 3600, MSCPARAM_B1800 }, 153 { 4800, MSCPARAM_B2400 }, 154 { 7200, MSCPARAM_B3600 }, 155 { 9600, MSCPARAM_B4800 }, 156 { 14400, MSCPARAM_B7200 }, 157 { 19200, MSCPARAM_B9600 }, 158 { 38400, MSCPARAM_B19200 }, 159 { 230400, MSCPARAM_B115200 }, 160 { -1, -1 } 161 }; 162 163 struct speedtab *mscspeedtab; 164 165 int mscmctl __P((dev_t dev, int bits, int howto)); 166 void mscmint __P((register void *data)); 167 168 int mscmatch __P((struct device *, struct cfdata *, void *)); 169 void mscattach __P((struct device *, struct device *, void *)); 170 171 #define SWFLAGS(dev) (msc->openflags | (MSCDIALIN(dev) ? 0 : TIOCFLAG_SOFTCAR)) 172 #define DEBUG_CD 0 173 174 struct cfattach msc_ca = { 175 sizeof(struct device), mscmatch, mscattach 176 }; 177 178 int 179 mscmatch(pdp, cfp, auxp) 180 struct device *pdp; 181 struct cfdata *cfp; 182 void *auxp; 183 { 184 struct zbus_args *zap; 185 186 zap = auxp; 187 if (zap->manid == 514 && (zap->prodid == 70 || zap->prodid == 69)) 188 return(1); 189 190 return (0); 191 } 192 193 void 194 mscattach(pdp, dp, auxp) 195 struct device *pdp, *dp; 196 void *auxp; 197 { 198 volatile struct mscmemory *mscmem; 199 struct mscdevice *msc; 200 struct zbus_args *zap; 201 int unit; 202 int Count; 203 204 zap = (struct zbus_args *)auxp; 205 unit = dp->dv_unit; 206 207 /* 208 * Make config msgs look nicer. 209 */ 210 printf("\n"); 211 212 if (mscinitcard(zap) != 0) { 213 printf("msc%d: Board initialize failed, bad download code.\n", unit); 214 return; 215 } 216 217 printf("msc%d: Board successfully initialized.\n", unit); 218 219 mscmem = (struct mscmemory *) zap->va; 220 221 if (mscmem->Common.Crystal == MSC_UNKNOWN) { 222 printf("msc%d: Unable to detect crystal frequency.\n", unit); 223 return; 224 } 225 226 if (mscmem->Common.Crystal == MSC_TURBO) { 227 printf("msc%d: Turbo version detected (%02x%02x:%d)\n", unit, 228 mscmem->Common.TimerH, mscmem->Common.TimerL, 229 mscmem->Common.Pad_a); 230 mscspeedtab = mscspeedtab_turbo; 231 } else { 232 printf("msc%d: Normal version detected (%02x%02x:%d)\n", unit, 233 mscmem->Common.TimerH, mscmem->Common.TimerL, 234 mscmem->Common.Pad_a); 235 mscspeedtab = mscspeedtab_normal; 236 } 237 238 mscmem->Common.CDStatus = 0; /* common status for all 7 ports */ 239 240 /* XXX 8 is a constant */ 241 for (Count = 0; Count < 8 && MSCSLOTUL(unit, Count) < MSCSLOTS; Count++) { 242 msc = &mscdev[MSCSLOTUL(unit, Count)]; 243 msc->board = mscmem; 244 msc->port = Count; 245 msc->flags = 0; 246 msc->openflags = 0; 247 msc->active = 1; 248 msc->unit = unit; 249 msc->closing = FALSE; 250 msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, Count))] = NULL; 251 msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, Count)) + 1] = NULL; 252 } 253 254 /* disable the non-existant eighth port */ 255 if (MSCSLOTUL(unit, NUMLINES) < MSCSLOTS) 256 mscdev[MSCSLOTUL(unit, NUMLINES)].active = 0; 257 258 msc_vbl_node[unit].function = (void (*) (void *)) mscmint; 259 msc_vbl_node[unit].data = (void *) unit; 260 261 add_vbl_function (&msc_vbl_node[unit], MSC_VBL_PRIORITY, (void *)unit); 262 263 return; 264 } 265 266 /* ARGSUSED */ 267 int 268 mscopen(dev, flag, mode, p) 269 dev_t dev; 270 int flag, mode; 271 struct proc *p; 272 { 273 register struct tty *tp; 274 struct mscdevice *msc; 275 volatile struct mscstatus *ms; 276 int error = 0; 277 int s, slot, ttyn; 278 279 /* get the device structure */ 280 slot = MSCSLOT(dev); 281 ttyn = MSCTTY(dev); 282 283 if (slot >= MSCSLOTS) 284 return ENXIO; 285 286 if (MSCLINE(dev) >= NUMLINES) 287 return ENXIO; 288 289 msc = &mscdev[slot]; 290 ms = &msc->board->Status[msc->port]; 291 292 if (!msc->active) 293 return ENXIO; 294 295 /* 296 * RFH: WHY here? Put down by while like other serial drivers 297 * But if we do that it makes things bomb. 298 */ 299 s = spltty(); 300 301 if (!msc_tty[ttyn]) { 302 303 tp = ttymalloc(); 304 tty_attach(tp); 305 msc_tty[ttyn] = tp; 306 msc_tty[ttyn+1] = (struct tty *)NULL; 307 308 #if 0 309 /* default values are not optimal for this device, increase buffers. */ 310 clfree(&tp->t_rawq); 311 clfree(&tp->t_canq); 312 clfree(&tp->t_outq); 313 clalloc(&tp->t_rawq, 8192, 1); 314 clalloc(&tp->t_canq, 8192, 1); 315 clalloc(&tp->t_outq, 8192, 0); 316 #endif 317 318 } else 319 tp = msc_tty[ttyn]; 320 321 tp->t_oproc = (void (*) (struct tty *)) mscstart; 322 tp->t_param = mscparam; 323 tp->t_dev = dev; 324 tp->t_hwiflow = mschwiflow; 325 326 /* if port is still closing, just bitbucket remaining characters */ 327 if (msc->closing) { 328 ms->OutFlush = TRUE; 329 msc->closing = FALSE; 330 } 331 332 /* initialize tty */ 333 if ((tp->t_state & TS_ISOPEN) == 0 && tp->t_wopen == 0) { 334 ttychars(tp); 335 if (tp->t_ispeed == 0) { 336 tp->t_iflag = TTYDEF_IFLAG; 337 tp->t_oflag = TTYDEF_OFLAG; 338 tp->t_cflag = TTYDEF_CFLAG; 339 tp->t_lflag = TTYDEF_LFLAG; 340 tp->t_ispeed = tp->t_ospeed = mscdefaultrate; 341 } 342 343 /* flags changed to be private to every unit by JM */ 344 if (msc->openflags & TIOCFLAG_CLOCAL) 345 tp->t_cflag |= CLOCAL; 346 if (msc->openflags & TIOCFLAG_CRTSCTS) 347 tp->t_cflag |= CRTSCTS; 348 if (msc->openflags & TIOCFLAG_MDMBUF) 349 tp->t_cflag |= MDMBUF; 350 351 mscparam(tp, &tp->t_termios); 352 ttsetwater(tp); 353 354 (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMSET); 355 356 if ((SWFLAGS(dev) & TIOCFLAG_SOFTCAR) || 357 (mscmctl(dev, 0, DMGET) & TIOCM_CD)) 358 tp->t_state |= TS_CARR_ON; 359 else 360 tp->t_state &= ~TS_CARR_ON; 361 362 } else { 363 if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) { 364 splx(s); 365 return (EBUSY); 366 } 367 } 368 369 /* 370 * if NONBLOCK requested, ignore carrier 371 */ 372 if (flag & O_NONBLOCK) { 373 #if DEBUG_CD 374 printf("msc%d: %d open nonblock\n", msc->unit, MSCLINE(dev)); 375 #endif 376 goto done; 377 } 378 379 /* 380 * s = spltty(); 381 * 382 * This causes hangs when put here, like other TTY drivers do, rather than 383 * above, WHY? RFH 384 * 385 */ 386 387 while ((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0) { 388 tp->t_wopen++; 389 390 #if DEBUG_CD 391 printf("msc%d: %d waiting for CD\n", msc->unit, MSCLINE(dev)); 392 #endif 393 error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, ttopen, 0); 394 tp->t_wopen--; 395 396 if (error) { 397 splx(s); 398 return(error); 399 } 400 } 401 402 #if DEBUG_CD 403 printf("msc%d: %d got CD\n", msc->unit, MSCLINE(dev)); 404 #endif 405 406 done: 407 /* This is a way to handle lost XON characters */ 408 if ((flag & O_TRUNC) && (tp->t_state & TS_TTSTOP)) { 409 tp->t_state &= ~TS_TTSTOP; 410 ttstart (tp); 411 } 412 413 splx(s); 414 415 /* 416 * Reset the tty pointer, as there could have been a dialout 417 * use of the tty with a dialin open waiting. 418 */ 419 tp->t_dev = dev; 420 421 return((*linesw[tp->t_line].l_open)(dev, tp)); 422 } 423 424 425 int 426 mscclose(dev, flag, mode, p) 427 dev_t dev; 428 int flag, mode; 429 struct proc *p; 430 { 431 register struct tty *tp; 432 int slot; 433 volatile struct mscstatus *ms; 434 struct mscdevice *msc; 435 436 /* get the device structure */ 437 slot = MSCSLOT(dev); 438 439 if (slot >= MSCSLOTS) 440 return ENXIO; 441 442 msc = &mscdev[slot]; 443 444 if (!msc->active) 445 return ENXIO; 446 447 ms = &msc->board->Status[msc->port]; 448 449 tp = msc_tty[MSCTTY(dev)]; 450 (*linesw[tp->t_line].l_close)(tp, flag); 451 452 (void) mscmctl(dev, 0, DMSET); 453 454 ttyclose(tp); 455 456 if (msc->flags & TIOCM_DTR) 457 msc->closing = TRUE; /* flush remaining characters before dropping DTR */ 458 else 459 ms->OutFlush = TRUE; /* just bitbucket remaining characters */ 460 461 return (0); 462 } 463 464 465 int 466 mscread(dev, uio, flag) 467 dev_t dev; 468 struct uio *uio; 469 int flag; 470 { 471 register struct tty *tp; 472 473 tp = msc_tty[MSCTTY(dev)]; 474 475 if (! tp) 476 return ENXIO; 477 478 return((*linesw[tp->t_line].l_read)(tp, uio, flag)); 479 } 480 481 482 int 483 mscwrite(dev, uio, flag) 484 dev_t dev; 485 struct uio *uio; 486 int flag; 487 { 488 register struct tty *tp; 489 490 tp = msc_tty[MSCTTY(dev)]; 491 492 if (! tp) 493 return ENXIO; 494 495 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 496 } 497 498 499 /* 500 * This interrupt is periodically invoked in the vertical blank 501 * interrupt. It's used to keep track of the modem control lines 502 * and (new with the fast_int code) to move accumulated data up in 503 * to the tty layer. 504 * 505 * NOTE: MSCCDHACK is an invention of mine for dubious purposes. If you 506 * want to activate it add 507 * options MSCCDHACK 508 * in the kernel conf file. Basically it forces CD->Low transitions 509 * to ALWAYS send a signal to the process, even if the device is in 510 * clocal mode or an outdial device. RFH 511 */ 512 void 513 mscmint (data) 514 register void *data; 515 { 516 register struct tty *tp; 517 struct mscdevice *msc; 518 volatile struct mscstatus *ms; 519 volatile u_char *ibuf, *cbuf; 520 unsigned char newhead; /* was int */ 521 unsigned char bufpos; /* was int */ 522 unsigned char ncd, ocd, ccd; 523 int unit, slot, maxslot; 524 int s, i; 525 526 unit = (int) data; 527 528 /* check each line on this board */ 529 maxslot = MSCSLOTUL(unit, NUMLINES); 530 if (maxslot > MSCSLOTS) 531 maxslot = MSCSLOTS; 532 533 msc = &mscdev[MSCSLOTUL(unit, 0)]; 534 535 newhead = msc->board->Common.CDHead; 536 bufpos = msc->board->Common.CDTail; 537 if (newhead != bufpos) { /* CD events in queue */ 538 /* set interrupt priority level */ 539 s = spltty(); 540 ocd = msc->board->Common.CDStatus; /* get old status bits */ 541 while (newhead != bufpos) { /* read all events */ 542 ncd = msc->board->CDBuf[bufpos++]; /* get one event */ 543 ccd = ncd ^ ocd; /* mask of changed lines*/ 544 ocd = ncd; /* save new status bits */ 545 #if DEBUG_CD 546 printf("ocd %02x ncd %02x ccd %02x\n", ocd, ncd, ccd); 547 #endif 548 for(i = 0; i < NUMLINES; i++) { /* do for all lines */ 549 if (ccd & 1) { /* this one changed */ 550 msc = &mscdev[MSCSLOTUL(unit, i)]; 551 if (ncd & 1) { /* CD is now OFF */ 552 #if DEBUG_CD 553 printf("msc%d: CD OFF %d\n", unit, msc->port); 554 #endif 555 msc->flags &= ~TIOCM_CD; 556 if ((tp = msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, i))]) && 557 (tp->t_state & TS_ISOPEN) && tp->t_wopen == 0) { 558 559 #ifndef MSCCDHACK 560 if (MSCDIALIN(tp->t_dev)) 561 #endif 562 { 563 if ((*linesw[tp->t_line].l_modem)(tp, 0) == 0) { 564 /* clear RTS and DTR, bitbucket output */ 565 ms = &msc->board->Status[msc->port]; 566 ms->Command = (ms->Command & ~MSCCMD_CMask) | 567 MSCCMD_Close; 568 ms->Setup = TRUE; 569 msc->flags &= ~(TIOCM_DTR | TIOCM_RTS); 570 ms->OutFlush = TRUE; 571 } 572 } 573 } 574 } else { /* CD is now ON */ 575 #if DEBUG_CD 576 printf("msc%d: CD ON %d\n", unit, msc->port); 577 #endif 578 msc->flags |= TIOCM_CD; 579 if ((tp = msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, i))]) && 580 (tp->t_state & TS_ISOPEN) && tp->t_wopen == 0) { 581 if (MSCDIALIN(tp->t_dev)) 582 (*linesw[tp->t_line].l_modem)(tp, 1); 583 } /* if tp valid and port open */ 584 } /* CD on/off */ 585 } /* if CD changed for this line */ 586 ccd >>= 1; ncd >>= 1; /* bit for next line */ 587 } /* for every line */ 588 } /* while events in queue */ 589 msc->board->Common.CDStatus = ocd; /* save new status */ 590 msc->board->Common.CDTail = bufpos; /* remove events */ 591 splx(s); 592 } /* if events in CD queue */ 593 594 for (slot = MSCSLOTUL(unit, 0); slot < maxslot; slot++) { 595 msc = &mscdev[slot]; 596 597 if (!msc->active) 598 continue; 599 600 tp = msc_tty[MSCTTYSLOT(slot)]; 601 ms = &msc->board->Status[msc->port]; 602 603 newhead = ms->InHead; /* 65c02 write pointer */ 604 605 /* yoohoo, is the port open? */ 606 if (tp && (tp->t_state & TS_ISOPEN) && tp->t_wopen == 0) { 607 /* port is open, handle all type of events */ 608 609 /* set interrupt priority level */ 610 s = spltty(); 611 612 /* check for input for this port */ 613 if (newhead != (bufpos = ms->InTail)) { 614 /* buffer for input chars/events */ 615 ibuf = &msc->board->InBuf[msc->port][0]; 616 617 /* data types of bytes in ibuf */ 618 cbuf = &msc->board->InCtl[msc->port][0]; 619 620 /* do for all chars, if room */ 621 while (bufpos != newhead) { 622 /* which type of input data? */ 623 switch (cbuf[bufpos]) { 624 /* input event (CD, BREAK, etc.) */ 625 case MSCINCTL_EVENT: 626 switch (ibuf[bufpos++]) { 627 case MSCEVENT_Break: 628 (*linesw[tp->t_line].l_rint)(TTY_FE, tp); 629 break; 630 631 default: 632 printf("msc%d: unknown event type %d\n", 633 msc->unit, ibuf[(bufpos-1)&0xff]); 634 } /* event type switch */ 635 break; 636 637 case MSCINCTL_CHAR: 638 if (tp->t_state & TS_TBLOCK) { 639 goto NoRoomForYa; 640 } 641 (*linesw[tp->t_line].l_rint)((int)ibuf[bufpos++], tp); 642 break; 643 644 default: 645 printf("msc%d: unknown data type %d\n", 646 msc->unit, cbuf[bufpos]); 647 bufpos++; 648 } /* switch on input data type */ 649 } /* while there's something in the buffer */ 650 NoRoomForYa: 651 ms->InTail = bufpos; /* tell 65C02 what we've read */ 652 } /* if there was something in the buffer */ 653 654 /* we get here only when the port is open */ 655 /* send output */ 656 if (tp->t_state & (TS_BUSY|TS_FLUSH)) { 657 658 bufpos = ms->OutHead - ms->OutTail; 659 660 /* busy and below low water mark? */ 661 if (tp->t_state & TS_BUSY) { 662 if (bufpos < IOBUFLOWWATER) { 663 tp->t_state &= ~TS_BUSY; /* not busy any more */ 664 if (tp->t_line) 665 (*linesw[tp->t_line].l_start)(tp); 666 else 667 mscstart(tp); 668 } 669 } 670 671 /* waiting for flush and buffer empty? */ 672 if (tp->t_state & TS_FLUSH) { 673 if (bufpos == 0) 674 tp->t_state &= ~TS_FLUSH; /* finished flushing */ 675 } 676 } /* BUSY or FLUSH */ 677 678 splx(s); 679 680 } else { /* End of port open */ 681 /* port is closed, don't pass on the chars from it */ 682 683 /* check for input for this port */ 684 if (newhead != (bufpos = ms->InTail)) { 685 /* buffer for input chars/events */ 686 ibuf = &msc->board->InBuf[msc->port][0]; 687 688 /* data types of bytes in ibuf */ 689 cbuf = &msc->board->InCtl[msc->port][0]; 690 691 /* do for all chars, if room */ 692 while (bufpos != newhead) { 693 /* which type of input data? */ 694 switch (cbuf[bufpos]) { 695 /* input event (BREAK, etc.) */ 696 case MSCINCTL_EVENT: 697 switch (ibuf[bufpos++]) { 698 default: 699 printf("msc: unknown event type %d\n", 700 ibuf[(bufpos-1)&0xff]); 701 } /* event type switch */ 702 break; 703 704 default: 705 bufpos++; 706 } /* switch on input data type */ 707 } /* while there's something in the buffer */ 708 709 ms->InTail = bufpos; /* tell 65C02 what we've read */ 710 } /* if there was something in the buffer */ 711 } /* End of port open/close */ 712 713 /* is this port closing? */ 714 if (msc->closing) { 715 /* if DTR is off, just bitbucket remaining characters */ 716 if ( (msc->flags & TIOCM_DTR) == 0) { 717 ms->OutFlush = TRUE; 718 msc->closing = FALSE; 719 } 720 /* if output has drained, drop DTR */ 721 else if (ms->OutHead == ms->OutTail) { 722 (void) mscmctl(tp->t_dev, 0, DMSET); 723 msc->closing = FALSE; 724 } 725 } 726 } /* For all ports */ 727 } 728 729 730 int 731 mscioctl(dev, cmd, data, flag, p) 732 dev_t dev; 733 u_long cmd; 734 caddr_t data; 735 int flag; 736 struct proc *p; 737 { 738 register struct tty *tp; 739 register int slot; 740 register int error; 741 struct mscdevice *msc; 742 volatile struct mscstatus *ms; 743 int s; 744 745 /* get the device structure */ 746 slot = MSCSLOT(dev); 747 748 if (slot >= MSCSLOTS) 749 return ENXIO; 750 751 msc = &mscdev[slot]; 752 753 if (!msc->active) 754 return ENXIO; 755 756 ms = &msc->board->Status[msc->port]; 757 if (!(tp = msc_tty[MSCTTY(dev)])) 758 return ENXIO; 759 760 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 761 762 if (error >= 0) 763 return (error); 764 765 error = ttioctl(tp, cmd, data, flag, p); 766 767 if (error >= 0) 768 return (error); 769 770 switch (cmd) { 771 772 /* send break */ 773 case TIOCSBRK: 774 s = spltty(); 775 ms->Command = (ms->Command & (~MSCCMD_RTSMask)) | MSCCMD_Break; 776 ms->Setup = TRUE; 777 splx(s); 778 break; 779 780 /* clear break */ 781 case TIOCCBRK: 782 s = spltty(); 783 ms->Command = (ms->Command & (~MSCCMD_RTSMask)) | MSCCMD_RTSOn; 784 ms->Setup = TRUE; 785 splx(s); 786 break; 787 788 case TIOCSDTR: 789 (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIS); 790 break; 791 792 case TIOCCDTR: 793 if (!MSCDIALIN(dev)) /* don't let dialins drop DTR */ 794 (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIC); 795 break; 796 797 case TIOCMSET: 798 (void) mscmctl(dev, *(int *)data, DMSET); 799 break; 800 801 case TIOCMBIS: 802 (void) mscmctl(dev, *(int *)data, DMBIS); 803 break; 804 805 case TIOCMBIC: 806 if (MSCDIALIN(dev)) /* don't let dialins drop DTR */ 807 (void) mscmctl(dev, *(int *)data & TIOCM_DTR, DMBIC); 808 else 809 (void) mscmctl(dev, *(int *)data, DMBIC); 810 break; 811 812 case TIOCMGET: 813 *(int *)data = mscmctl(dev, 0, DMGET); 814 break; 815 816 case TIOCGFLAGS: 817 *(int *)data = SWFLAGS(dev); 818 break; 819 820 case TIOCSFLAGS: 821 error = suser(p->p_ucred, &p->p_acflag); 822 if (error != 0) 823 return(EPERM); 824 msc->openflags = *(int *)data; 825 /* only allow valid flags */ 826 msc->openflags &= 827 (TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | TIOCFLAG_CRTSCTS); 828 break; 829 830 default: 831 return (ENOTTY); 832 } 833 834 return (0); 835 } 836 837 838 int 839 mscparam(tp, t) 840 register struct tty *tp; 841 register struct termios *t; 842 { 843 register int cflag = t->c_cflag; 844 struct mscdevice *msc; 845 volatile struct mscstatus *ms; 846 int s, slot; 847 int ospeed = ttspeedtab(t->c_ospeed, mscspeedtab); 848 849 /* get the device structure */ 850 slot = MSCSLOT(tp->t_dev); 851 852 if (slot >= MSCSLOTS) 853 return ENXIO; 854 855 msc = &mscdev[slot]; 856 857 if (!msc->active) 858 return ENXIO; 859 860 ms = &msc->board->Status[msc->port]; 861 862 /* check requested parameters */ 863 if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed)) 864 return (EINVAL); 865 866 /* and copy to tty */ 867 tp->t_ispeed = t->c_ispeed; 868 tp->t_ospeed = t->c_ospeed; 869 tp->t_cflag = cflag; 870 871 /* hang up if baud is zero */ 872 if (t->c_ospeed == 0) { 873 if (!MSCDIALIN(tp->t_dev)) /* don't let dialins drop DTR */ 874 (void) mscmctl(tp->t_dev, 0, DMSET); 875 } else { 876 /* set the baud rate */ 877 s = spltty(); 878 ms->Param = (ms->Param & ~MSCPARAM_BaudMask) | ospeed | MSCPARAM_RcvBaud; 879 880 /* 881 * Make sure any previous hangup is undone, ie. reenable DTR. 882 * also mscmctl will cause the speed to be set 883 */ 884 (void) mscmctl (tp->t_dev, TIOCM_DTR | TIOCM_RTS, DMSET); 885 886 splx(s); 887 } 888 889 return(0); 890 } 891 892 893 /* 894 * Jukka's code initializes alot of stuff that other drivers don't 895 * I'm including it here so that this code is a common set of work 896 * done by both of us. rfh 897 */ 898 int 899 mschwiflow(tp, flag) 900 struct tty *tp; 901 int flag; 902 { 903 904 /* Rob's version */ 905 #if 1 906 if (flag) 907 mscmctl( tp->t_dev, TIOCM_RTS, DMBIC); /* Clear/Lower RTS */ 908 else 909 mscmctl( tp->t_dev, TIOCM_RTS, DMBIS); /* Set/Raise RTS */ 910 911 #else /* Jukka's version */ 912 913 int s, slot; 914 struct mscdevice *msc; 915 volatile struct mscstatus *ms; 916 917 /* get the device structure */ 918 slot = MSCSLOT(tp->t_dev); 919 if (slot >= MSCSLOTS) 920 return ENXIO; 921 msc = &mscdev[slot]; 922 if (!msc->active) 923 return ENXIO; 924 ms = &msc->board->Status[msc->port]; 925 926 /* Well, we should really _do_ something here, but the 65c02 code 927 * manages the RTS signal on its own now, so... This will probably 928 * change in the future. 929 */ 930 #endif 931 return 1; 932 } 933 934 935 void 936 mscstart(tp) 937 register struct tty *tp; 938 { 939 register int cc; 940 register char *cp; 941 register int mhead; 942 int s, slot; 943 struct mscdevice *msc; 944 volatile struct mscstatus *ms; 945 volatile char *mob; 946 int hiwat = 0; 947 int maxout; 948 949 if (! (tp->t_state & TS_ISOPEN)) 950 return; 951 952 slot = MSCSLOT(tp->t_dev); 953 954 #if 0 955 printf("starting msc%d\n", slot); 956 #endif 957 958 s = spltty(); 959 960 /* don't start if explicitly stopped */ 961 if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP)) 962 goto out; 963 964 /* wake up if below low water */ 965 cc = tp->t_outq.c_cc; 966 967 if (cc <= tp->t_lowat) { 968 if (tp->t_state & TS_ASLEEP) { 969 tp->t_state &= ~TS_ASLEEP; 970 wakeup((caddr_t)&tp->t_outq); 971 } 972 selwakeup(&tp->t_wsel); 973 } 974 975 /* don't bother if no characters or busy */ 976 if (cc == 0 || (tp->t_state & TS_BUSY)) 977 goto out; 978 979 /* 980 * Limit the amount of output we do in one burst 981 */ 982 msc = &mscdev[slot]; 983 ms = &msc->board->Status[msc->port]; 984 mhead = ms->OutHead; 985 maxout = mhead - ms->OutTail; 986 987 if (maxout < 0) 988 maxout += IOBUFLEN; 989 990 maxout = IOBUFLEN - 1 - maxout; 991 992 if (cc >= maxout) { 993 hiwat++; 994 cc = maxout; 995 } 996 997 cc = q_to_b (&tp->t_outq, msc->tmpbuf, cc); 998 999 if (cc > 0) { 1000 tp->t_state |= TS_BUSY; 1001 1002 mob = &msc->board->OutBuf[msc->port][0]; 1003 cp = &msc->tmpbuf[0]; 1004 1005 /* enable output */ 1006 ms->OutDisable = FALSE; 1007 1008 #if 0 1009 msc->tmpbuf[cc] = 0; 1010 printf("sending '%s'\n", msctmpbuf); 1011 #endif 1012 1013 /* send the first char across to reduce latency */ 1014 mob[mhead++] = *cp++; 1015 mhead &= IOBUFLENMASK; 1016 ms->OutHead = mhead; 1017 cc--; 1018 1019 /* copy the rest of the chars across quickly */ 1020 while (cc > 0) { 1021 mob[mhead++] = *cp++; 1022 mhead &= IOBUFLENMASK; 1023 cc--; 1024 } 1025 ms->OutHead = mhead; 1026 1027 /* leave the device busy if we've filled the buffer */ 1028 if (!hiwat) 1029 tp->t_state &= ~TS_BUSY; 1030 } 1031 1032 out: 1033 splx(s); 1034 } 1035 1036 1037 /* XXX */ 1038 /* 1039 * Stop output on a line. 1040 */ 1041 /*ARGSUSED*/ 1042 void 1043 mscstop(tp, flag) 1044 register struct tty *tp; 1045 int flag; /* defaulted to int anyway */ 1046 { 1047 register int s; 1048 #if 0 1049 struct mscdevice *msc; 1050 volatile struct mscstatus *ms; 1051 #endif 1052 1053 s = spltty(); 1054 if (tp->t_state & TS_BUSY) { 1055 if ((tp->t_state & TS_TTSTOP) == 0) { 1056 tp->t_state |= TS_FLUSH; 1057 #if 0 1058 msc = &mscdev[MSCSLOT(tp->t_dev)]; 1059 ms = &msc->board->Status[msc->port]; 1060 printf("stopped output on msc%d\n", MSCSLOT(tp->t_dev)); 1061 ms->OutDisable = TRUE; 1062 #endif 1063 } 1064 } 1065 splx(s); 1066 } 1067 1068 1069 /* 1070 * bits can be: TIOCM_DTR, TIOCM_RTS, TIOCM_CTS, TIOCM_CD, TIOCM_RI, TIOCM_DSR 1071 */ 1072 int 1073 mscmctl(dev, bits, how) 1074 dev_t dev; 1075 int bits, how; 1076 { 1077 struct mscdevice *msc; 1078 volatile struct mscstatus *ms; 1079 int slot; 1080 int s; 1081 u_char newcmd; 1082 int OldFlags; 1083 1084 /* get the device structure */ 1085 slot = MSCSLOT(dev); 1086 1087 if (slot >= MSCSLOTS) 1088 return ENXIO; 1089 1090 msc = &mscdev[slot]; 1091 1092 if (!msc->active) 1093 return ENXIO; 1094 1095 s = spltty(); 1096 1097 if (how != DMGET) { 1098 OldFlags = msc->flags; 1099 bits &= TIOCM_DTR | TIOCM_RTS; /* can only modify DTR and RTS */ 1100 1101 switch (how) { 1102 case DMSET: 1103 msc->flags = (bits | (msc->flags & ~(TIOCM_DTR | TIOCM_RTS))); 1104 break; 1105 1106 case DMBIC: 1107 msc->flags &= ~bits; 1108 break; 1109 1110 case DMBIS: 1111 msc->flags |= bits; 1112 break; 1113 } 1114 1115 /* modify modem control state */ 1116 ms = &msc->board->Status[msc->port]; 1117 1118 if (msc->flags & TIOCM_RTS) /* was bits & */ 1119 newcmd = MSCCMD_RTSOn; 1120 else /* this doesn't actually work now */ 1121 newcmd = MSCCMD_RTSOff; 1122 1123 if (msc->flags & TIOCM_DTR) /* was bits & */ 1124 newcmd |= MSCCMD_Enable; 1125 1126 ms->Command = (ms->Command & (~MSCCMD_RTSMask & ~MSCCMD_Enable)) | newcmd; 1127 ms->Setup = TRUE; 1128 1129 /* if we've dropped DTR, bitbucket any pending output */ 1130 if ( (OldFlags & TIOCM_DTR) && ((bits & TIOCM_DTR) == 0)) 1131 ms->OutFlush = TRUE; 1132 } 1133 1134 bits = msc->flags; 1135 1136 (void) splx(s); 1137 1138 return(bits); 1139 } 1140 1141 1142 struct tty * 1143 msctty(dev) 1144 dev_t dev; 1145 { 1146 return(msc_tty[MSCTTY(dev)]); 1147 } 1148 1149 1150 /* 1151 * Load JM's freely redistributable A2232 6502c code. Let turbo detector 1152 * run for a while too. 1153 */ 1154 1155 int 1156 mscinitcard(zap) 1157 struct zbus_args *zap; 1158 { 1159 int bcount; 1160 short start; 1161 u_char *from; 1162 volatile u_char *to; 1163 volatile struct mscmemory *mlm; 1164 1165 mlm = (volatile struct mscmemory *)zap->va; 1166 (void)mlm->Enable6502Reset; 1167 1168 /* copy the code across to the board */ 1169 to = (u_char *)mlm; 1170 from = msc6502code; bcount = sizeof(msc6502code) - 2; 1171 start = *(short *)from; from += sizeof(start); 1172 to += start; 1173 1174 while(bcount--) *to++ = *from++; 1175 1176 mlm->Common.Crystal = MSC_UNKNOWN; /* use automatic speed check */ 1177 1178 /* start 6502 running */ 1179 (void)mlm->ResetBoard; 1180 1181 /* wait until speed detector has finished */ 1182 for (bcount = 0; bcount < 200; bcount++) { 1183 delay(10000); 1184 if (mlm->Common.Crystal) 1185 break; 1186 } 1187 1188 return(0); 1189 } 1190 1191 #endif /* NMSC > 0 */ 1192
Indexes created Tue Sep 23 20:09:58 GMT 2025