msc.c revision 1.22
1 /* $NetBSD: msc.c,v 1.22 2002/03/17 19:40:31 atatat 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 <sys/cdefs.h> 55 __KERNEL_RCSID(0, "$NetBSD: msc.c,v 1.22 2002/03/17 19:40:31 atatat Exp $"); 56 57 #include "msc.h" 58 59 #if NMSC > 0 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/ioctl.h> 63 #include <sys/tty.h> 64 #include <sys/proc.h> 65 #include <sys/file.h> 66 #include <sys/malloc.h> 67 #include <sys/uio.h> 68 #include <sys/kernel.h> 69 #include <sys/syslog.h> 70 #include <sys/device.h> 71 72 #include <amiga/amiga/device.h> 73 #include <amiga/dev/zbusvar.h> 74 #include <amiga/dev/mscreg.h> 75 #include <machine/cpu.h> 76 77 #include <amiga/amiga/custom.h> 78 #include <amiga/amiga/cia.h> 79 #include <amiga/amiga/cc.h> 80 81 #include <sys/conf.h> 82 #include <machine/conf.h> 83 84 /* 6502 code for A2232 card */ 85 #include "msc6502.h" 86 87 /* 88 * Note: These are Zik's original comments: 89 * There is a bit of a "gotcha" concerning the numbering 90 * of msc devices and the specification of the number of serial 91 * lines in the kernel. 92 * 93 * Each board has seven lines, but for programming convenience 94 * and compatibility with Amiga UNIX the boards' minor device 95 * numbers are allocated in groups of sixteen: 96 * 97 * minor device numbers 98 * First board 0 2 4 6 8 10 12 99 * Second board 16 18 20 22 24 26 28 100 * Third board 32 34 36 38 40 42 44 101 * 102 * The intermediate minor device numbers are dialin versions 103 * of the same devices. ie. 10 is dialout line 6 and 11 is 104 * the dialin version of line 6. 105 * 106 * On the other hand, I have made the NMSC config option refer 107 * to the total number of a2232 cards, not the maximum 108 * minor device number. So you might have NMSC=3, in which case 109 * you have three boards with minor device numbers from 0 to 45. 110 */ 111 112 int mscparam(struct tty *, struct termios *); 113 void mscstart(struct tty *); 114 int mschwiflow(struct tty *, int); 115 int mscinitcard(struct zbus_args *); 116 117 int mscdefaultrate = TTYDEF_SPEED; 118 119 struct mscdevice mscdev[MSCSLOTS]; /* device structs for all lines */ 120 struct tty *msc_tty[MSCTTYS]; /* ttys for all lines */ 121 122 struct vbl_node msc_vbl_node[NMSC]; /* vbl interrupt node per board */ 123 124 struct speedtab mscspeedtab_normal[] = { 125 { 0, 0 }, 126 { 50, MSCPARAM_B50 }, 127 { 75, MSCPARAM_B75 }, 128 { 110, MSCPARAM_B110 }, 129 { 134, MSCPARAM_B134 }, 130 { 150, MSCPARAM_B150 }, 131 { 300, MSCPARAM_B300 }, 132 { 600, MSCPARAM_B600 }, 133 { 1200, MSCPARAM_B1200 }, 134 { 1800, MSCPARAM_B1800 }, 135 { 2400, MSCPARAM_B2400 }, 136 { 3600, MSCPARAM_B3600 }, 137 { 4800, MSCPARAM_B4800 }, 138 { 7200, MSCPARAM_B7200 }, 139 { 9600, MSCPARAM_B9600 }, 140 { 19200, MSCPARAM_B19200 }, 141 { 115200, MSCPARAM_B115200 }, 142 { -1, -1 } 143 }; 144 145 struct speedtab mscspeedtab_turbo[] = { 146 { 0, 0 }, 147 { 100, MSCPARAM_B50 }, 148 { 150, MSCPARAM_B75 }, 149 { 220, MSCPARAM_B110 }, 150 { 269, MSCPARAM_B134 }, 151 { 300, MSCPARAM_B150 }, 152 { 600, MSCPARAM_B300 }, 153 { 1200, MSCPARAM_B600 }, 154 { 2400, MSCPARAM_B1200 }, 155 { 3600, MSCPARAM_B1800 }, 156 { 4800, MSCPARAM_B2400 }, 157 { 7200, MSCPARAM_B3600 }, 158 { 9600, MSCPARAM_B4800 }, 159 { 14400, MSCPARAM_B7200 }, 160 { 19200, MSCPARAM_B9600 }, 161 { 38400, MSCPARAM_B19200 }, 162 { 230400, MSCPARAM_B115200 }, 163 { -1, -1 } 164 }; 165 166 struct speedtab *mscspeedtab; 167 168 int mscmctl(dev_t dev, int bits, int howto); 169 void mscmint(register void *data); 170 171 int mscmatch(struct device *, struct cfdata *, void *); 172 void mscattach(struct device *, struct device *, void *); 173 174 #define SWFLAGS(dev) (msc->openflags | (MSCDIALIN(dev) ? 0 : TIOCFLAG_SOFTCAR)) 175 #define DEBUG_CD 0 176 177 struct cfattach msc_ca = { 178 sizeof(struct device), mscmatch, mscattach 179 }; 180 181 int 182 mscmatch(struct device *pdp, struct cfdata *cfp, 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(struct device *pdp, struct device *dp, void *auxp) 195 { 196 volatile struct mscmemory *mscmem; 197 struct mscdevice *msc; 198 struct zbus_args *zap; 199 int unit; 200 int Count; 201 202 zap = (struct zbus_args *)auxp; 203 unit = dp->dv_unit; 204 205 /* 206 * Make config msgs look nicer. 207 */ 208 printf("\n"); 209 210 if (mscinitcard(zap) != 0) { 211 printf("msc%d: Board initialize failed, bad download code.\n", unit); 212 return; 213 } 214 215 printf("msc%d: Board successfully initialized.\n", unit); 216 217 mscmem = (struct mscmemory *) zap->va; 218 219 if (mscmem->Common.Crystal == MSC_UNKNOWN) { 220 printf("msc%d: Unable to detect crystal frequency.\n", unit); 221 return; 222 } 223 224 if (mscmem->Common.Crystal == MSC_TURBO) { 225 printf("msc%d: Turbo version detected (%02x%02x:%d)\n", unit, 226 mscmem->Common.TimerH, mscmem->Common.TimerL, 227 mscmem->Common.Pad_a); 228 mscspeedtab = mscspeedtab_turbo; 229 } else { 230 printf("msc%d: Normal version detected (%02x%02x:%d)\n", unit, 231 mscmem->Common.TimerH, mscmem->Common.TimerL, 232 mscmem->Common.Pad_a); 233 mscspeedtab = mscspeedtab_normal; 234 } 235 236 mscmem->Common.CDStatus = 0; /* common status for all 7 ports */ 237 238 /* XXX 8 is a constant */ 239 for (Count = 0; Count < 8 && MSCSLOTUL(unit, Count) < MSCSLOTS; Count++) { 240 msc = &mscdev[MSCSLOTUL(unit, Count)]; 241 msc->board = mscmem; 242 msc->port = Count; 243 msc->flags = 0; 244 msc->openflags = 0; 245 msc->active = 1; 246 msc->unit = unit; 247 msc->closing = FALSE; 248 msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, Count))] = NULL; 249 msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, Count)) + 1] = NULL; 250 } 251 252 /* disable the non-existent eighth port */ 253 if (MSCSLOTUL(unit, NUMLINES) < MSCSLOTS) 254 mscdev[MSCSLOTUL(unit, NUMLINES)].active = 0; 255 256 msc_vbl_node[unit].function = (void (*) (void *)) mscmint; 257 msc_vbl_node[unit].data = (void *) unit; 258 259 add_vbl_function (&msc_vbl_node[unit], MSC_VBL_PRIORITY, (void *)unit); 260 261 return; 262 } 263 264 /* ARGSUSED */ 265 int 266 mscopen(dev_t dev, int flag, int mode, struct proc *p) 267 { 268 register struct tty *tp; 269 struct mscdevice *msc; 270 volatile struct mscstatus *ms; 271 int error = 0; 272 int s, slot, ttyn; 273 274 /* get the device structure */ 275 slot = MSCSLOT(dev); 276 ttyn = MSCTTY(dev); 277 278 if (slot >= MSCSLOTS) 279 return ENXIO; 280 281 if (MSCLINE(dev) >= NUMLINES) 282 return ENXIO; 283 284 msc = &mscdev[slot]; 285 ms = &msc->board->Status[msc->port]; 286 287 if (!msc->active) 288 return ENXIO; 289 290 /* 291 * RFH: WHY here? Put down by while like other serial drivers 292 * But if we do that it makes things bomb. 293 */ 294 s = spltty(); 295 296 if (!msc_tty[ttyn]) { 297 298 tp = ttymalloc(); 299 tty_attach(tp); 300 msc_tty[ttyn] = tp; 301 msc_tty[ttyn+1] = (struct tty *)NULL; 302 303 #if 0 304 /* default values are not optimal for this device, increase buffers. */ 305 clfree(&tp->t_rawq); 306 clfree(&tp->t_canq); 307 clfree(&tp->t_outq); 308 clalloc(&tp->t_rawq, 8192, 1); 309 clalloc(&tp->t_canq, 8192, 1); 310 clalloc(&tp->t_outq, 8192, 0); 311 #endif 312 313 } else 314 tp = msc_tty[ttyn]; 315 316 tp->t_oproc = (void (*) (struct tty *)) mscstart; 317 tp->t_param = mscparam; 318 tp->t_dev = dev; 319 tp->t_hwiflow = mschwiflow; 320 321 /* if port is still closing, just bitbucket remaining characters */ 322 if (msc->closing) { 323 ms->OutFlush = TRUE; 324 msc->closing = FALSE; 325 } 326 327 /* initialize tty */ 328 if ((tp->t_state & TS_ISOPEN) == 0 && tp->t_wopen == 0) { 329 ttychars(tp); 330 if (tp->t_ispeed == 0) { 331 tp->t_iflag = TTYDEF_IFLAG; 332 tp->t_oflag = TTYDEF_OFLAG; 333 tp->t_cflag = TTYDEF_CFLAG; 334 tp->t_lflag = TTYDEF_LFLAG; 335 tp->t_ispeed = tp->t_ospeed = mscdefaultrate; 336 } 337 338 /* flags changed to be private to every unit by JM */ 339 if (msc->openflags & TIOCFLAG_CLOCAL) 340 tp->t_cflag |= CLOCAL; 341 if (msc->openflags & TIOCFLAG_CRTSCTS) 342 tp->t_cflag |= CRTSCTS; 343 if (msc->openflags & TIOCFLAG_MDMBUF) 344 tp->t_cflag |= MDMBUF; 345 346 mscparam(tp, &tp->t_termios); 347 ttsetwater(tp); 348 349 (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMSET); 350 351 if ((SWFLAGS(dev) & TIOCFLAG_SOFTCAR) || 352 (mscmctl(dev, 0, DMGET) & TIOCM_CD)) 353 tp->t_state |= TS_CARR_ON; 354 else 355 tp->t_state &= ~TS_CARR_ON; 356 357 } else { 358 if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) { 359 splx(s); 360 return (EBUSY); 361 } 362 } 363 364 /* 365 * if NONBLOCK requested, ignore carrier 366 */ 367 if (flag & O_NONBLOCK) { 368 #if DEBUG_CD 369 printf("msc%d: %d open nonblock\n", msc->unit, MSCLINE(dev)); 370 #endif 371 goto done; 372 } 373 374 /* 375 * s = spltty(); 376 * 377 * This causes hangs when put here, like other TTY drivers do, rather than 378 * above, WHY? RFH 379 * 380 */ 381 382 while ((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0) { 383 tp->t_wopen++; 384 385 #if DEBUG_CD 386 printf("msc%d: %d waiting for CD\n", msc->unit, MSCLINE(dev)); 387 #endif 388 error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, ttopen, 0); 389 tp->t_wopen--; 390 391 if (error) { 392 splx(s); 393 return(error); 394 } 395 } 396 397 #if DEBUG_CD 398 printf("msc%d: %d got CD\n", msc->unit, MSCLINE(dev)); 399 #endif 400 401 done: 402 /* This is a way to handle lost XON characters */ 403 if ((flag & O_TRUNC) && (tp->t_state & TS_TTSTOP)) { 404 tp->t_state &= ~TS_TTSTOP; 405 ttstart (tp); 406 } 407 408 splx(s); 409 410 /* 411 * Reset the tty pointer, as there could have been a dialout 412 * use of the tty with a dialin open waiting. 413 */ 414 tp->t_dev = dev; 415 416 return tp->t_linesw->l_open(dev, tp); 417 } 418 419 420 int 421 mscclose(dev_t dev, int flag, int mode, struct proc *p) 422 { 423 register struct tty *tp; 424 int slot; 425 volatile struct mscstatus *ms; 426 struct mscdevice *msc; 427 428 /* get the device structure */ 429 slot = MSCSLOT(dev); 430 431 if (slot >= MSCSLOTS) 432 return ENXIO; 433 434 msc = &mscdev[slot]; 435 436 if (!msc->active) 437 return ENXIO; 438 439 ms = &msc->board->Status[msc->port]; 440 441 tp = msc_tty[MSCTTY(dev)]; 442 tp->t_linesw->l_close(tp, flag); 443 444 (void) mscmctl(dev, 0, DMSET); 445 446 ttyclose(tp); 447 448 if (msc->flags & TIOCM_DTR) 449 msc->closing = TRUE; /* flush remaining characters before dropping DTR */ 450 else 451 ms->OutFlush = TRUE; /* just bitbucket remaining characters */ 452 453 return (0); 454 } 455 456 457 int 458 mscread(dev_t dev, struct uio *uio, int flag) 459 { 460 register struct tty *tp; 461 462 tp = msc_tty[MSCTTY(dev)]; 463 464 if (! tp) 465 return ENXIO; 466 467 return tp->t_linesw->l_read(tp, uio, flag); 468 } 469 470 471 int 472 mscwrite(dev_t dev, struct uio *uio, int flag) 473 { 474 register struct tty *tp; 475 476 tp = msc_tty[MSCTTY(dev)]; 477 478 if (! tp) 479 return ENXIO; 480 481 return tp->t_linesw->l_write(tp, uio, flag); 482 } 483 484 int 485 mscpoll(dev_t dev, int events, struct proc *p) 486 { 487 register struct tty *tp; 488 489 tp = msc_tty[MSCTTY(dev)]; 490 491 if (! tp) 492 return ENXIO; 493 494 return ((*tp->t_linesw->l_poll)(tp, events, p)); 495 } 496 497 /* 498 * This interrupt is periodically invoked in the vertical blank 499 * interrupt. It's used to keep track of the modem control lines 500 * and (new with the fast_int code) to move accumulated data up in 501 * to the tty layer. 502 * 503 * NOTE: MSCCDHACK is an invention of mine for dubious purposes. If you 504 * want to activate it add 505 * options MSCCDHACK 506 * in the kernel conf file. Basically it forces CD->Low transitions 507 * to ALWAYS send a signal to the process, even if the device is in 508 * clocal mode or an outdial device. RFH 509 */ 510 void 511 mscmint(register void *data) 512 { 513 register struct tty *tp; 514 struct mscdevice *msc; 515 volatile struct mscstatus *ms; 516 volatile u_char *ibuf, *cbuf; 517 unsigned char newhead; /* was int */ 518 unsigned char bufpos; /* was int */ 519 unsigned char ncd, ocd, ccd; 520 int unit, slot, maxslot; 521 int s, i; 522 523 unit = (int) data; 524 525 /* check each line on this board */ 526 maxslot = MSCSLOTUL(unit, NUMLINES); 527 if (maxslot > MSCSLOTS) 528 maxslot = MSCSLOTS; 529 530 msc = &mscdev[MSCSLOTUL(unit, 0)]; 531 532 newhead = msc->board->Common.CDHead; 533 bufpos = msc->board->Common.CDTail; 534 if (newhead != bufpos) { /* CD events in queue */ 535 /* set interrupt priority level */ 536 s = spltty(); 537 ocd = msc->board->Common.CDStatus; /* get old status bits */ 538 while (newhead != bufpos) { /* read all events */ 539 ncd = msc->board->CDBuf[bufpos++]; /* get one event */ 540 ccd = ncd ^ ocd; /* mask of changed lines*/ 541 ocd = ncd; /* save new status bits */ 542 #if DEBUG_CD 543 printf("ocd %02x ncd %02x ccd %02x\n", ocd, ncd, ccd); 544 #endif 545 for(i = 0; i < NUMLINES; i++) { /* do for all lines */ 546 if (ccd & 1) { /* this one changed */ 547 msc = &mscdev[MSCSLOTUL(unit, i)]; 548 if (ncd & 1) { /* CD is now OFF */ 549 #if DEBUG_CD 550 printf("msc%d: CD OFF %d\n", unit, msc->port); 551 #endif 552 msc->flags &= ~TIOCM_CD; 553 if ((tp = msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, i))]) && 554 (tp->t_state & TS_ISOPEN) && tp->t_wopen == 0) { 555 556 #ifndef MSCCDHACK 557 if (MSCDIALIN(tp->t_dev)) 558 #endif 559 { 560 if (tp->t_linesw->l_modem(tp, 0) == 0) { 561 /* clear RTS and DTR, bitbucket output */ 562 ms = &msc->board->Status[msc->port]; 563 ms->Command = (ms->Command & ~MSCCMD_CMask) | 564 MSCCMD_Close; 565 ms->Setup = TRUE; 566 msc->flags &= ~(TIOCM_DTR | TIOCM_RTS); 567 ms->OutFlush = TRUE; 568 } 569 } 570 } 571 } else { /* CD is now ON */ 572 #if DEBUG_CD 573 printf("msc%d: CD ON %d\n", unit, msc->port); 574 #endif 575 msc->flags |= TIOCM_CD; 576 if ((tp = msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, i))]) && 577 (tp->t_state & TS_ISOPEN) && tp->t_wopen == 0) { 578 if (MSCDIALIN(tp->t_dev)) 579 tp->t_linesw->l_modem(tp, 1); 580 } /* if tp valid and port open */ 581 } /* CD on/off */ 582 } /* if CD changed for this line */ 583 ccd >>= 1; ncd >>= 1; /* bit for next line */ 584 } /* for every line */ 585 } /* while events in queue */ 586 msc->board->Common.CDStatus = ocd; /* save new status */ 587 msc->board->Common.CDTail = bufpos; /* remove events */ 588 splx(s); 589 } /* if events in CD queue */ 590 591 for (slot = MSCSLOTUL(unit, 0); slot < maxslot; slot++) { 592 msc = &mscdev[slot]; 593 594 if (!msc->active) 595 continue; 596 597 tp = msc_tty[MSCTTYSLOT(slot)]; 598 ms = &msc->board->Status[msc->port]; 599 600 newhead = ms->InHead; /* 65c02 write pointer */ 601 602 /* yoohoo, is the port open? */ 603 if (tp && (tp->t_state & TS_ISOPEN) && tp->t_wopen == 0) { 604 /* port is open, handle all type of events */ 605 606 /* set interrupt priority level */ 607 s = spltty(); 608 609 /* check for input for this port */ 610 if (newhead != (bufpos = ms->InTail)) { 611 /* buffer for input chars/events */ 612 ibuf = &msc->board->InBuf[msc->port][0]; 613 614 /* data types of bytes in ibuf */ 615 cbuf = &msc->board->InCtl[msc->port][0]; 616 617 /* do for all chars, if room */ 618 while (bufpos != newhead) { 619 /* which type of input data? */ 620 switch (cbuf[bufpos]) { 621 /* input event (CD, BREAK, etc.) */ 622 case MSCINCTL_EVENT: 623 switch (ibuf[bufpos++]) { 624 case MSCEVENT_Break: 625 tp->t_linesw->l_rint(TTY_FE, tp); 626 break; 627 628 default: 629 printf("msc%d: unknown event type %d\n", 630 msc->unit, ibuf[(bufpos-1)&0xff]); 631 } /* event type switch */ 632 break; 633 634 case MSCINCTL_CHAR: 635 if (tp->t_state & TS_TBLOCK) { 636 goto NoRoomForYa; 637 } 638 tp->t_linesw->l_rint((int)ibuf[bufpos++], tp); 639 break; 640 641 default: 642 printf("msc%d: unknown data type %d\n", 643 msc->unit, cbuf[bufpos]); 644 bufpos++; 645 } /* switch on input data type */ 646 } /* while there's something in the buffer */ 647 NoRoomForYa: 648 ms->InTail = bufpos; /* tell 65C02 what we've read */ 649 } /* if there was something in the buffer */ 650 651 /* we get here only when the port is open */ 652 /* send output */ 653 if (tp->t_state & (TS_BUSY|TS_FLUSH)) { 654 655 bufpos = ms->OutHead - ms->OutTail; 656 657 /* busy and below low water mark? */ 658 if (tp->t_state & TS_BUSY) { 659 if (bufpos < IOBUFLOWWATER) { 660 tp->t_state &= ~TS_BUSY; /* not busy any more */ 661 if (tp->t_linesw) 662 tp->t_linesw->l_start(tp); 663 else 664 mscstart(tp); 665 } 666 } 667 668 /* waiting for flush and buffer empty? */ 669 if (tp->t_state & TS_FLUSH) { 670 if (bufpos == 0) 671 tp->t_state &= ~TS_FLUSH; /* finished flushing */ 672 } 673 } /* BUSY or FLUSH */ 674 675 splx(s); 676 677 } else { /* End of port open */ 678 /* port is closed, don't pass on the chars from it */ 679 680 /* check for input for this port */ 681 if (newhead != (bufpos = ms->InTail)) { 682 /* buffer for input chars/events */ 683 ibuf = &msc->board->InBuf[msc->port][0]; 684 685 /* data types of bytes in ibuf */ 686 cbuf = &msc->board->InCtl[msc->port][0]; 687 688 /* do for all chars, if room */ 689 while (bufpos != newhead) { 690 /* which type of input data? */ 691 switch (cbuf[bufpos]) { 692 /* input event (BREAK, etc.) */ 693 case MSCINCTL_EVENT: 694 switch (ibuf[bufpos++]) { 695 default: 696 printf("msc: unknown event type %d\n", 697 ibuf[(bufpos-1)&0xff]); 698 } /* event type switch */ 699 break; 700 701 default: 702 bufpos++; 703 } /* switch on input data type */ 704 } /* while there's something in the buffer */ 705 706 ms->InTail = bufpos; /* tell 65C02 what we've read */ 707 } /* if there was something in the buffer */ 708 } /* End of port open/close */ 709 710 /* is this port closing? */ 711 if (msc->closing) { 712 /* if DTR is off, just bitbucket remaining characters */ 713 if ( (msc->flags & TIOCM_DTR) == 0) { 714 ms->OutFlush = TRUE; 715 msc->closing = FALSE; 716 } 717 /* if output has drained, drop DTR */ 718 else if (ms->OutHead == ms->OutTail) { 719 (void) mscmctl(tp->t_dev, 0, DMSET); 720 msc->closing = FALSE; 721 } 722 } 723 } /* For all ports */ 724 } 725 726 727 int 728 mscioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 729 { 730 register struct tty *tp; 731 register int slot; 732 register int error; 733 struct mscdevice *msc; 734 volatile struct mscstatus *ms; 735 int s; 736 737 /* get the device structure */ 738 slot = MSCSLOT(dev); 739 740 if (slot >= MSCSLOTS) 741 return ENXIO; 742 743 msc = &mscdev[slot]; 744 745 if (!msc->active) 746 return ENXIO; 747 748 ms = &msc->board->Status[msc->port]; 749 if (!(tp = msc_tty[MSCTTY(dev)])) 750 return ENXIO; 751 752 error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, p); 753 if (error != EPASSTHROUGH) 754 return (error); 755 756 error = ttioctl(tp, cmd, data, flag, p); 757 if (error != EPASSTHROUGH) 758 return (error); 759 760 switch (cmd) { 761 762 /* send break */ 763 case TIOCSBRK: 764 s = spltty(); 765 ms->Command = (ms->Command & (~MSCCMD_RTSMask)) | MSCCMD_Break; 766 ms->Setup = TRUE; 767 splx(s); 768 break; 769 770 /* clear break */ 771 case TIOCCBRK: 772 s = spltty(); 773 ms->Command = (ms->Command & (~MSCCMD_RTSMask)) | MSCCMD_RTSOn; 774 ms->Setup = TRUE; 775 splx(s); 776 break; 777 778 case TIOCSDTR: 779 (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIS); 780 break; 781 782 case TIOCCDTR: 783 if (!MSCDIALIN(dev)) /* don't let dialins drop DTR */ 784 (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIC); 785 break; 786 787 case TIOCMSET: 788 (void) mscmctl(dev, *(int *)data, DMSET); 789 break; 790 791 case TIOCMBIS: 792 (void) mscmctl(dev, *(int *)data, DMBIS); 793 break; 794 795 case TIOCMBIC: 796 if (MSCDIALIN(dev)) /* don't let dialins drop DTR */ 797 (void) mscmctl(dev, *(int *)data & TIOCM_DTR, DMBIC); 798 else 799 (void) mscmctl(dev, *(int *)data, DMBIC); 800 break; 801 802 case TIOCMGET: 803 *(int *)data = mscmctl(dev, 0, DMGET); 804 break; 805 806 case TIOCGFLAGS: 807 *(int *)data = SWFLAGS(dev); 808 break; 809 810 case TIOCSFLAGS: 811 error = suser(p->p_ucred, &p->p_acflag); 812 if (error != 0) 813 return(EPERM); 814 msc->openflags = *(int *)data; 815 /* only allow valid flags */ 816 msc->openflags &= 817 (TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | TIOCFLAG_CRTSCTS); 818 break; 819 820 default: 821 return (EPASSTHROUGH); 822 } 823 824 return (0); 825 } 826 827 828 int 829 mscparam(register struct tty *tp, register struct termios *t) 830 { 831 register int cflag = t->c_cflag; 832 struct mscdevice *msc; 833 volatile struct mscstatus *ms; 834 int s, slot; 835 int ospeed = ttspeedtab(t->c_ospeed, mscspeedtab); 836 837 /* get the device structure */ 838 slot = MSCSLOT(tp->t_dev); 839 840 if (slot >= MSCSLOTS) 841 return ENXIO; 842 843 msc = &mscdev[slot]; 844 845 if (!msc->active) 846 return ENXIO; 847 848 ms = &msc->board->Status[msc->port]; 849 850 /* check requested parameters */ 851 if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed)) 852 return (EINVAL); 853 854 /* and copy to tty */ 855 tp->t_ispeed = t->c_ispeed; 856 tp->t_ospeed = t->c_ospeed; 857 tp->t_cflag = cflag; 858 859 /* hang up if baud is zero */ 860 if (t->c_ospeed == 0) { 861 if (!MSCDIALIN(tp->t_dev)) /* don't let dialins drop DTR */ 862 (void) mscmctl(tp->t_dev, 0, DMSET); 863 } else { 864 /* set the baud rate */ 865 s = spltty(); 866 ms->Param = (ms->Param & ~MSCPARAM_BaudMask) | ospeed | MSCPARAM_RcvBaud; 867 868 /* 869 * Make sure any previous hangup is undone, ie. reenable DTR. 870 * also mscmctl will cause the speed to be set 871 */ 872 (void) mscmctl (tp->t_dev, TIOCM_DTR | TIOCM_RTS, DMSET); 873 874 splx(s); 875 } 876 877 return(0); 878 } 879 880 881 /* 882 * Jukka's code initializes alot of stuff that other drivers don't 883 * I'm including it here so that this code is a common set of work 884 * done by both of us. rfh 885 */ 886 int 887 mschwiflow(struct tty *tp, int flag) 888 { 889 890 /* Rob's version */ 891 #if 1 892 if (flag) 893 mscmctl( tp->t_dev, TIOCM_RTS, DMBIC); /* Clear/Lower RTS */ 894 else 895 mscmctl( tp->t_dev, TIOCM_RTS, DMBIS); /* Set/Raise RTS */ 896 897 #else /* Jukka's version */ 898 899 int s, slot; 900 struct mscdevice *msc; 901 volatile struct mscstatus *ms; 902 903 /* get the device structure */ 904 slot = MSCSLOT(tp->t_dev); 905 if (slot >= MSCSLOTS) 906 return ENXIO; 907 msc = &mscdev[slot]; 908 if (!msc->active) 909 return ENXIO; 910 ms = &msc->board->Status[msc->port]; 911 912 /* Well, we should really _do_ something here, but the 65c02 code 913 * manages the RTS signal on its own now, so... This will probably 914 * change in the future. 915 */ 916 #endif 917 return 1; 918 } 919 920 921 void 922 mscstart(register struct tty *tp) 923 { 924 register int cc; 925 register char *cp; 926 register int mhead; 927 int s, slot; 928 struct mscdevice *msc; 929 volatile struct mscstatus *ms; 930 volatile char *mob; 931 int hiwat = 0; 932 int maxout; 933 934 if (! (tp->t_state & TS_ISOPEN)) 935 return; 936 937 slot = MSCSLOT(tp->t_dev); 938 939 #if 0 940 printf("starting msc%d\n", slot); 941 #endif 942 943 s = spltty(); 944 945 /* don't start if explicitly stopped */ 946 if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP)) 947 goto out; 948 949 /* wake up if below low water */ 950 cc = tp->t_outq.c_cc; 951 952 if (cc <= tp->t_lowat) { 953 if (tp->t_state & TS_ASLEEP) { 954 tp->t_state &= ~TS_ASLEEP; 955 wakeup((caddr_t)&tp->t_outq); 956 } 957 selwakeup(&tp->t_wsel); 958 } 959 960 /* don't bother if no characters or busy */ 961 if (cc == 0 || (tp->t_state & TS_BUSY)) 962 goto out; 963 964 /* 965 * Limit the amount of output we do in one burst 966 */ 967 msc = &mscdev[slot]; 968 ms = &msc->board->Status[msc->port]; 969 mhead = ms->OutHead; 970 maxout = mhead - ms->OutTail; 971 972 if (maxout < 0) 973 maxout += IOBUFLEN; 974 975 maxout = IOBUFLEN - 1 - maxout; 976 977 if (cc >= maxout) { 978 hiwat++; 979 cc = maxout; 980 } 981 982 cc = q_to_b (&tp->t_outq, msc->tmpbuf, cc); 983 984 if (cc > 0) { 985 tp->t_state |= TS_BUSY; 986 987 mob = &msc->board->OutBuf[msc->port][0]; 988 cp = &msc->tmpbuf[0]; 989 990 /* enable output */ 991 ms->OutDisable = FALSE; 992 993 #if 0 994 msc->tmpbuf[cc] = 0; 995 printf("sending '%s'\n", msctmpbuf); 996 #endif 997 998 /* send the first char across to reduce latency */ 999 mob[mhead++] = *cp++; 1000 mhead &= IOBUFLENMASK; 1001 ms->OutHead = mhead; 1002 cc--; 1003 1004 /* copy the rest of the chars across quickly */ 1005 while (cc > 0) { 1006 mob[mhead++] = *cp++; 1007 mhead &= IOBUFLENMASK; 1008 cc--; 1009 } 1010 ms->OutHead = mhead; 1011 1012 /* leave the device busy if we've filled the buffer */ 1013 if (!hiwat) 1014 tp->t_state &= ~TS_BUSY; 1015 } 1016 1017 out: 1018 splx(s); 1019 } 1020 1021 1022 /* XXX */ 1023 /* 1024 * Stop output on a line. 1025 */ 1026 /*ARGSUSED*/ 1027 void 1028 mscstop(register struct tty *tp, int flag) 1029 /* flag variable defaulted to int anyway */ 1030 { 1031 register int s; 1032 #if 0 1033 struct mscdevice *msc; 1034 volatile struct mscstatus *ms; 1035 #endif 1036 1037 s = spltty(); 1038 if (tp->t_state & TS_BUSY) { 1039 if ((tp->t_state & TS_TTSTOP) == 0) { 1040 tp->t_state |= TS_FLUSH; 1041 #if 0 1042 msc = &mscdev[MSCSLOT(tp->t_dev)]; 1043 ms = &msc->board->Status[msc->port]; 1044 printf("stopped output on msc%d\n", MSCSLOT(tp->t_dev)); 1045 ms->OutDisable = TRUE; 1046 #endif 1047 } 1048 } 1049 splx(s); 1050 } 1051 1052 1053 /* 1054 * bits can be: TIOCM_DTR, TIOCM_RTS, TIOCM_CTS, TIOCM_CD, TIOCM_RI, TIOCM_DSR 1055 */ 1056 int 1057 mscmctl(dev_t dev, int bits, int how) 1058 { 1059 struct mscdevice *msc; 1060 volatile struct mscstatus *ms; 1061 int slot; 1062 int s; 1063 u_char newcmd; 1064 int OldFlags; 1065 1066 /* get the device structure */ 1067 slot = MSCSLOT(dev); 1068 1069 if (slot >= MSCSLOTS) 1070 return ENXIO; 1071 1072 msc = &mscdev[slot]; 1073 1074 if (!msc->active) 1075 return ENXIO; 1076 1077 s = spltty(); 1078 1079 if (how != DMGET) { 1080 OldFlags = msc->flags; 1081 bits &= TIOCM_DTR | TIOCM_RTS; /* can only modify DTR and RTS */ 1082 1083 switch (how) { 1084 case DMSET: 1085 msc->flags = (bits | (msc->flags & ~(TIOCM_DTR | TIOCM_RTS))); 1086 break; 1087 1088 case DMBIC: 1089 msc->flags &= ~bits; 1090 break; 1091 1092 case DMBIS: 1093 msc->flags |= bits; 1094 break; 1095 } 1096 1097 /* modify modem control state */ 1098 ms = &msc->board->Status[msc->port]; 1099 1100 if (msc->flags & TIOCM_RTS) /* was bits & */ 1101 newcmd = MSCCMD_RTSOn; 1102 else /* this doesn't actually work now */ 1103 newcmd = MSCCMD_RTSOff; 1104 1105 if (msc->flags & TIOCM_DTR) /* was bits & */ 1106 newcmd |= MSCCMD_Enable; 1107 1108 ms->Command = (ms->Command & (~MSCCMD_RTSMask & ~MSCCMD_Enable)) | newcmd; 1109 ms->Setup = TRUE; 1110 1111 /* if we've dropped DTR, bitbucket any pending output */ 1112 if ( (OldFlags & TIOCM_DTR) && ((bits & TIOCM_DTR) == 0)) 1113 ms->OutFlush = TRUE; 1114 } 1115 1116 bits = msc->flags; 1117 1118 (void) splx(s); 1119 1120 return(bits); 1121 } 1122 1123 1124 struct tty * 1125 msctty(dev_t dev) 1126 { 1127 return(msc_tty[MSCTTY(dev)]); 1128 } 1129 1130 1131 /* 1132 * Load JM's freely redistributable A2232 6502c code. Let turbo detector 1133 * run for a while too. 1134 */ 1135 1136 int 1137 mscinitcard(struct zbus_args *zap) 1138 { 1139 int bcount; 1140 short start; 1141 u_char *from; 1142 volatile u_char *to; 1143 volatile struct mscmemory *mlm; 1144 1145 mlm = (volatile struct mscmemory *)zap->va; 1146 (void)mlm->Enable6502Reset; 1147 1148 /* copy the code across to the board */ 1149 to = (u_char *)mlm; 1150 from = msc6502code; bcount = sizeof(msc6502code) - 2; 1151 start = *(short *)from; from += sizeof(start); 1152 to += start; 1153 1154 while(bcount--) *to++ = *from++; 1155 1156 mlm->Common.Crystal = MSC_UNKNOWN; /* use automatic speed check */ 1157 1158 /* start 6502 running */ 1159 (void)mlm->ResetBoard; 1160 1161 /* wait until speed detector has finished */ 1162 for (bcount = 0; bcount < 200; bcount++) { 1163 delay(10000); 1164 if (mlm->Common.Crystal) 1165 break; 1166 } 1167 1168 return(0); 1169 } 1170 1171 #endif /* NMSC > 0 */ 1172
Indexes created Tue Sep 23 07:09:52 GMT 2025