msc.c revision 1.31.10.1
1 /* $NetBSD: msc.c,v 1.31.10.1 2006/03/08 00:43:05 elad Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * - converted from NetBSD Amiga serial driver to A2232 serial driver 32 * by zik 931207 33 * - added ttyflags hooks rfh 940419 34 * - added new style config support rfh 940601 35 * - added code to halt board during memory load so board doesn't flip 36 * out. /dev/reload works now. Also created mschwiflow function so BSD can 37 * attempt to use board RTS flow control now. rfh 950108 38 * - Integrated work from Jukka Marin <jmarin (at) jmp.fi> and 39 * Timo Rossi <trossi (at) jyu.fi> The mscmint() code is Jukka's. 950916 40 * Integrated more bug fixes by Jukka Marin <jmarin (at) jmp.fi> 950918 41 * Also added Jukka's turbo board code. 950918 42 * - Reformatted to NetBSD style format. 43 * - Rewritten the carrier detect system to prevent lock-ups (jm 951029) 44 */ 45 46 /* 47 * Copyright (c) 1993 Zik. 48 * Copyright (c) 1995 Jukka Marin <jmarin (at) jmp.fi>. 49 * Copyright (c) 1995 Timo Rossi <trossi (at) jyu.fi>. 50 * Copyright (c) 1995 Rob Healey <rhealey (at) kas.helios.mn.org>. 51 * 52 * Redistribution and use in source and binary forms, with or without 53 * modification, are permitted provided that the following conditions 54 * are met: 55 * 1. Redistributions of source code must retain the above copyright 56 * notice, this list of conditions and the following disclaimer. 57 * 2. Redistributions in binary form must reproduce the above copyright 58 * notice, this list of conditions and the following disclaimer in the 59 * documentation and/or other materials provided with the distribution. 60 * 3. All advertising materials mentioning features or use of this software 61 * must display the following acknowledgement: 62 * This product includes software developed by the University of 63 * California, Berkeley and its contributors. 64 * 4. Neither the name of the University nor the names of its contributors 65 * may be used to endorse or promote products derived from this software 66 * without specific prior written permission. 67 * 68 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 69 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 70 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 71 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 72 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 73 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 74 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 75 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 76 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 77 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 78 * SUCH DAMAGE. 79 * 80 * - converted from NetBSD Amiga serial driver to A2232 serial driver 81 * by zik 931207 82 * - added ttyflags hooks rfh 940419 83 * - added new style config support rfh 940601 84 * - added code to halt board during memory load so board doesn't flip 85 * out. /dev/reload works now. Also created mschwiflow function so BSD can 86 * attempt to use board RTS flow control now. rfh 950108 87 * - Integrated work from Jukka Marin <jmarin (at) jmp.fi> and 88 * Timo Rossi <trossi (at) jyu.fi> The mscmint() code is Jukka's. 950916 89 * Integrated more bug fixes by Jukka Marin <jmarin (at) jmp.fi> 950918 90 * Also added Jukka's turbo board code. 950918 91 * - Reformatted to NetBSD style format. 92 * - Rewritten the carrier detect system to prevent lock-ups (jm 951029) 93 */ 94 95 #include <sys/cdefs.h> 96 __KERNEL_RCSID(0, "$NetBSD: msc.c,v 1.31.10.1 2006/03/08 00:43:05 elad Exp $"); 97 98 #include "msc.h" 99 100 #if NMSC > 0 101 #include <sys/param.h> 102 #include <sys/systm.h> 103 #include <sys/ioctl.h> 104 #include <sys/tty.h> 105 #include <sys/proc.h> 106 #include <sys/file.h> 107 #include <sys/malloc.h> 108 #include <sys/uio.h> 109 #include <sys/kernel.h> 110 #include <sys/syslog.h> 111 #include <sys/device.h> 112 #include <sys/conf.h> 113 114 #include <amiga/amiga/device.h> 115 #include <amiga/dev/zbusvar.h> 116 #include <amiga/dev/mscreg.h> 117 #include <machine/cpu.h> 118 119 #include <amiga/amiga/custom.h> 120 #include <amiga/amiga/cia.h> 121 #include <amiga/amiga/cc.h> 122 123 /* 6502 code for A2232 card */ 124 #include "msc6502.h" 125 126 /* 127 * Note: These are Zik's original comments: 128 * There is a bit of a "gotcha" concerning the numbering 129 * of msc devices and the specification of the number of serial 130 * lines in the kernel. 131 * 132 * Each board has seven lines, but for programming convenience 133 * and compatibility with Amiga UNIX the boards' minor device 134 * numbers are allocated in groups of sixteen: 135 * 136 * minor device numbers 137 * First board 0 2 4 6 8 10 12 138 * Second board 16 18 20 22 24 26 28 139 * Third board 32 34 36 38 40 42 44 140 * 141 * The intermediate minor device numbers are dialin versions 142 * of the same devices. ie. 10 is dialout line 6 and 11 is 143 * the dialin version of line 6. 144 * 145 * On the other hand, I have made the NMSC config option refer 146 * to the total number of a2232 cards, not the maximum 147 * minor device number. So you might have NMSC=3, in which case 148 * you have three boards with minor device numbers from 0 to 45. 149 */ 150 151 int mscparam(struct tty *, struct termios *); 152 void mscstart(struct tty *); 153 int mschwiflow(struct tty *, int); 154 int mscinitcard(struct zbus_args *); 155 156 int mscdefaultrate = TTYDEF_SPEED; 157 158 struct mscdevice mscdev[MSCSLOTS]; /* device structs for all lines */ 159 struct tty *msc_tty[MSCTTYS]; /* ttys for all lines */ 160 161 struct vbl_node msc_vbl_node[NMSC]; /* vbl interrupt node per board */ 162 163 const struct speedtab mscspeedtab_normal[] = { 164 { 0, 0 }, 165 { 50, MSCPARAM_B50 }, 166 { 75, MSCPARAM_B75 }, 167 { 110, MSCPARAM_B110 }, 168 { 134, MSCPARAM_B134 }, 169 { 150, MSCPARAM_B150 }, 170 { 300, MSCPARAM_B300 }, 171 { 600, MSCPARAM_B600 }, 172 { 1200, MSCPARAM_B1200 }, 173 { 1800, MSCPARAM_B1800 }, 174 { 2400, MSCPARAM_B2400 }, 175 { 3600, MSCPARAM_B3600 }, 176 { 4800, MSCPARAM_B4800 }, 177 { 7200, MSCPARAM_B7200 }, 178 { 9600, MSCPARAM_B9600 }, 179 { 19200, MSCPARAM_B19200 }, 180 { 115200, MSCPARAM_B115200 }, 181 { -1, -1 } 182 }; 183 184 const struct speedtab mscspeedtab_turbo[] = { 185 { 0, 0 }, 186 { 100, MSCPARAM_B50 }, 187 { 150, MSCPARAM_B75 }, 188 { 220, MSCPARAM_B110 }, 189 { 269, MSCPARAM_B134 }, 190 { 300, MSCPARAM_B150 }, 191 { 600, MSCPARAM_B300 }, 192 { 1200, MSCPARAM_B600 }, 193 { 2400, MSCPARAM_B1200 }, 194 { 3600, MSCPARAM_B1800 }, 195 { 4800, MSCPARAM_B2400 }, 196 { 7200, MSCPARAM_B3600 }, 197 { 9600, MSCPARAM_B4800 }, 198 { 14400, MSCPARAM_B7200 }, 199 { 19200, MSCPARAM_B9600 }, 200 { 38400, MSCPARAM_B19200 }, 201 { 230400, MSCPARAM_B115200 }, 202 { -1, -1 } 203 }; 204 205 const struct speedtab *mscspeedtab; 206 207 int mscmctl(dev_t dev, int bits, int howto); 208 void mscmint(register void *data); 209 210 int mscmatch(struct device *, struct cfdata *, void *); 211 void mscattach(struct device *, struct device *, void *); 212 213 #define SWFLAGS(dev) (msc->openflags | (MSCDIALIN(dev) ? 0 : TIOCFLAG_SOFTCAR)) 214 #define DEBUG_CD 0 215 216 CFATTACH_DECL(msc, sizeof(struct device), 217 mscmatch, mscattach, NULL, NULL); 218 219 dev_type_open(mscopen); 220 dev_type_close(mscclose); 221 dev_type_read(mscread); 222 dev_type_write(mscwrite); 223 dev_type_ioctl(mscioctl); 224 dev_type_stop(mscstop); 225 dev_type_tty(msctty); 226 dev_type_poll(mscpoll); 227 228 const struct cdevsw msc_cdevsw = { 229 mscopen, mscclose, mscread, mscwrite, mscioctl, 230 mscstop, msctty, mscpoll, nommap, ttykqfilter, D_TTY 231 }; 232 233 int 234 mscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 235 { 236 struct zbus_args *zap; 237 238 zap = auxp; 239 if (zap->manid == 514 && (zap->prodid == 70 || zap->prodid == 69)) 240 return(1); 241 242 return (0); 243 } 244 245 void 246 mscattach(struct device *pdp, struct device *dp, void *auxp) 247 { 248 volatile struct mscmemory *mscmem; 249 struct mscdevice *msc; 250 struct zbus_args *zap; 251 int unit; 252 int Count; 253 254 zap = (struct zbus_args *)auxp; 255 unit = dp->dv_unit; 256 257 /* 258 * Make config msgs look nicer. 259 */ 260 printf("\n"); 261 262 if (mscinitcard(zap) != 0) { 263 printf("msc%d: Board initialize failed, bad download code.\n", unit); 264 return; 265 } 266 267 printf("msc%d: Board successfully initialized.\n", unit); 268 269 mscmem = (struct mscmemory *) zap->va; 270 271 if (mscmem->Common.Crystal == MSC_UNKNOWN) { 272 printf("msc%d: Unable to detect crystal frequency.\n", unit); 273 return; 274 } 275 276 if (mscmem->Common.Crystal == MSC_TURBO) { 277 printf("msc%d: Turbo version detected (%02x%02x:%d)\n", unit, 278 mscmem->Common.TimerH, mscmem->Common.TimerL, 279 mscmem->Common.Pad_a); 280 mscspeedtab = mscspeedtab_turbo; 281 } else { 282 printf("msc%d: Normal version detected (%02x%02x:%d)\n", unit, 283 mscmem->Common.TimerH, mscmem->Common.TimerL, 284 mscmem->Common.Pad_a); 285 mscspeedtab = mscspeedtab_normal; 286 } 287 288 mscmem->Common.CDStatus = 0; /* common status for all 7 ports */ 289 290 /* XXX 8 is a constant */ 291 for (Count = 0; Count < 8 && MSCSLOTUL(unit, Count) < MSCSLOTS; Count++) { 292 msc = &mscdev[MSCSLOTUL(unit, Count)]; 293 msc->board = mscmem; 294 msc->port = Count; 295 msc->flags = 0; 296 msc->openflags = 0; 297 msc->active = 1; 298 msc->unit = unit; 299 msc->closing = FALSE; 300 msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, Count))] = NULL; 301 msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, Count)) + 1] = NULL; 302 } 303 304 /* disable the non-existent eighth port */ 305 if (MSCSLOTUL(unit, NUMLINES) < MSCSLOTS) 306 mscdev[MSCSLOTUL(unit, NUMLINES)].active = 0; 307 308 msc_vbl_node[unit].function = (void (*) (void *)) mscmint; 309 msc_vbl_node[unit].data = (void *) unit; 310 311 add_vbl_function (&msc_vbl_node[unit], MSC_VBL_PRIORITY, (void *)unit); 312 313 return; 314 } 315 316 /* ARGSUSED */ 317 int 318 mscopen(dev_t dev, int flag, int mode, struct lwp *l) 319 { 320 register struct tty *tp; 321 struct mscdevice *msc; 322 volatile struct mscstatus *ms; 323 int error = 0; 324 int s, slot, ttyn; 325 326 /* get the device structure */ 327 slot = MSCSLOT(dev); 328 ttyn = MSCTTY(dev); 329 330 if (slot >= MSCSLOTS) 331 return ENXIO; 332 333 if (MSCLINE(dev) >= NUMLINES) 334 return ENXIO; 335 336 msc = &mscdev[slot]; 337 ms = &msc->board->Status[msc->port]; 338 339 if (!msc->active) 340 return ENXIO; 341 342 /* 343 * RFH: WHY here? Put down by while like other serial drivers 344 * But if we do that it makes things bomb. 345 */ 346 s = spltty(); 347 348 if (!msc_tty[ttyn]) { 349 350 tp = ttymalloc(); 351 tty_attach(tp); 352 msc_tty[ttyn] = tp; 353 msc_tty[ttyn+1] = (struct tty *)NULL; 354 355 #if 0 356 /* default values are not optimal for this device, increase buffers. */ 357 clfree(&tp->t_rawq); 358 clfree(&tp->t_canq); 359 clfree(&tp->t_outq); 360 clalloc(&tp->t_rawq, 8192, 1); 361 clalloc(&tp->t_canq, 8192, 1); 362 clalloc(&tp->t_outq, 8192, 0); 363 #endif 364 365 } else 366 tp = msc_tty[ttyn]; 367 368 tp->t_oproc = (void (*) (struct tty *)) mscstart; 369 tp->t_param = mscparam; 370 tp->t_dev = dev; 371 tp->t_hwiflow = mschwiflow; 372 373 /* if port is still closing, just bitbucket remaining characters */ 374 if (msc->closing) { 375 ms->OutFlush = TRUE; 376 msc->closing = FALSE; 377 } 378 379 /* initialize tty */ 380 if ((tp->t_state & TS_ISOPEN) == 0 && tp->t_wopen == 0) { 381 ttychars(tp); 382 if (tp->t_ispeed == 0) { 383 tp->t_iflag = TTYDEF_IFLAG; 384 tp->t_oflag = TTYDEF_OFLAG; 385 tp->t_cflag = TTYDEF_CFLAG; 386 tp->t_lflag = TTYDEF_LFLAG; 387 tp->t_ispeed = tp->t_ospeed = mscdefaultrate; 388 } 389 390 /* flags changed to be private to every unit by JM */ 391 if (msc->openflags & TIOCFLAG_CLOCAL) 392 tp->t_cflag |= CLOCAL; 393 if (msc->openflags & TIOCFLAG_CRTSCTS) 394 tp->t_cflag |= CRTSCTS; 395 if (msc->openflags & TIOCFLAG_MDMBUF) 396 tp->t_cflag |= MDMBUF; 397 398 mscparam(tp, &tp->t_termios); 399 ttsetwater(tp); 400 401 (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMSET); 402 403 if ((SWFLAGS(dev) & TIOCFLAG_SOFTCAR) || 404 (mscmctl(dev, 0, DMGET) & TIOCM_CD)) 405 tp->t_state |= TS_CARR_ON; 406 else 407 tp->t_state &= ~TS_CARR_ON; 408 409 } else { 410 if (tp->t_state & TS_XCLUDE && 411 generic_authorize(l->l_proc->p_cred, 412 KAUTH_GENERIC_ISSUSER, 413 &l->l_proc->p_acflag) != 0) { 414 splx(s); 415 return (EBUSY); 416 } 417 } 418 419 /* 420 * if NONBLOCK requested, ignore carrier 421 */ 422 if (flag & O_NONBLOCK) { 423 #if DEBUG_CD 424 printf("msc%d: %d open nonblock\n", msc->unit, MSCLINE(dev)); 425 #endif 426 goto done; 427 } 428 429 /* 430 * s = spltty(); 431 * 432 * This causes hangs when put here, like other TTY drivers do, rather than 433 * above, WHY? RFH 434 * 435 */ 436 437 while ((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0) { 438 tp->t_wopen++; 439 440 #if DEBUG_CD 441 printf("msc%d: %d waiting for CD\n", msc->unit, MSCLINE(dev)); 442 #endif 443 error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, ttopen, 0); 444 tp->t_wopen--; 445 446 if (error) { 447 splx(s); 448 return(error); 449 } 450 } 451 452 #if DEBUG_CD 453 printf("msc%d: %d got CD\n", msc->unit, MSCLINE(dev)); 454 #endif 455 456 done: 457 /* This is a way to handle lost XON characters */ 458 if ((flag & O_TRUNC) && (tp->t_state & TS_TTSTOP)) { 459 tp->t_state &= ~TS_TTSTOP; 460 ttstart (tp); 461 } 462 463 splx(s); 464 465 /* 466 * Reset the tty pointer, as there could have been a dialout 467 * use of the tty with a dialin open waiting. 468 */ 469 tp->t_dev = dev; 470 471 return tp->t_linesw->l_open(dev, tp); 472 } 473 474 475 int 476 mscclose(dev_t dev, int flag, int mode, struct lwp *l) 477 { 478 register struct tty *tp; 479 int slot; 480 volatile struct mscstatus *ms; 481 struct mscdevice *msc; 482 483 /* get the device structure */ 484 slot = MSCSLOT(dev); 485 486 if (slot >= MSCSLOTS) 487 return ENXIO; 488 489 msc = &mscdev[slot]; 490 491 if (!msc->active) 492 return ENXIO; 493 494 ms = &msc->board->Status[msc->port]; 495 496 tp = msc_tty[MSCTTY(dev)]; 497 tp->t_linesw->l_close(tp, flag); 498 499 (void) mscmctl(dev, 0, DMSET); 500 501 ttyclose(tp); 502 503 if (msc->flags & TIOCM_DTR) 504 msc->closing = TRUE; /* flush remaining characters before dropping DTR */ 505 else 506 ms->OutFlush = TRUE; /* just bitbucket remaining characters */ 507 508 return (0); 509 } 510 511 512 int 513 mscread(dev_t dev, struct uio *uio, int flag) 514 { 515 register struct tty *tp; 516 517 tp = msc_tty[MSCTTY(dev)]; 518 519 if (! tp) 520 return ENXIO; 521 522 return tp->t_linesw->l_read(tp, uio, flag); 523 } 524 525 526 int 527 mscwrite(dev_t dev, struct uio *uio, int flag) 528 { 529 register struct tty *tp; 530 531 tp = msc_tty[MSCTTY(dev)]; 532 533 if (! tp) 534 return ENXIO; 535 536 return tp->t_linesw->l_write(tp, uio, flag); 537 } 538 539 int 540 mscpoll(dev_t dev, int events, struct lwp *l) 541 { 542 register struct tty *tp; 543 544 tp = msc_tty[MSCTTY(dev)]; 545 546 if (! tp) 547 return ENXIO; 548 549 return ((*tp->t_linesw->l_poll)(tp, events, l)); 550 } 551 552 /* 553 * This interrupt is periodically invoked in the vertical blank 554 * interrupt. It's used to keep track of the modem control lines 555 * and (new with the fast_int code) to move accumulated data up in 556 * to the tty layer. 557 * 558 * NOTE: MSCCDHACK is an invention of mine for dubious purposes. If you 559 * want to activate it add 560 * options MSCCDHACK 561 * in the kernel conf file. Basically it forces CD->Low transitions 562 * to ALWAYS send a signal to the process, even if the device is in 563 * clocal mode or an outdial device. RFH 564 */ 565 void 566 mscmint(register void *data) 567 { 568 register struct tty *tp; 569 struct mscdevice *msc; 570 volatile struct mscstatus *ms; 571 volatile u_char *ibuf, *cbuf; 572 unsigned char newhead; /* was int */ 573 unsigned char bufpos; /* was int */ 574 unsigned char ncd, ocd, ccd; 575 int unit, slot, maxslot; 576 int s, i; 577 578 unit = (int) data; 579 580 /* check each line on this board */ 581 maxslot = MSCSLOTUL(unit, NUMLINES); 582 if (maxslot > MSCSLOTS) 583 maxslot = MSCSLOTS; 584 585 msc = &mscdev[MSCSLOTUL(unit, 0)]; 586 587 newhead = msc->board->Common.CDHead; 588 bufpos = msc->board->Common.CDTail; 589 if (newhead != bufpos) { /* CD events in queue */ 590 /* set interrupt priority level */ 591 s = spltty(); 592 ocd = msc->board->Common.CDStatus; /* get old status bits */ 593 while (newhead != bufpos) { /* read all events */ 594 ncd = msc->board->CDBuf[bufpos++]; /* get one event */ 595 ccd = ncd ^ ocd; /* mask of changed lines*/ 596 ocd = ncd; /* save new status bits */ 597 #if DEBUG_CD 598 printf("ocd %02x ncd %02x ccd %02x\n", ocd, ncd, ccd); 599 #endif 600 for(i = 0; i < NUMLINES; i++) { /* do for all lines */ 601 if (ccd & 1) { /* this one changed */ 602 msc = &mscdev[MSCSLOTUL(unit, i)]; 603 if (ncd & 1) { /* CD is now OFF */ 604 #if DEBUG_CD 605 printf("msc%d: CD OFF %d\n", unit, msc->port); 606 #endif 607 msc->flags &= ~TIOCM_CD; 608 if ((tp = msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, i))]) && 609 (tp->t_state & TS_ISOPEN) && tp->t_wopen == 0) { 610 611 #ifndef MSCCDHACK 612 if (MSCDIALIN(tp->t_dev)) 613 #endif 614 { 615 if (tp->t_linesw->l_modem(tp, 0) == 0) { 616 /* clear RTS and DTR, bitbucket output */ 617 ms = &msc->board->Status[msc->port]; 618 ms->Command = (ms->Command & ~MSCCMD_CMask) | 619 MSCCMD_Close; 620 ms->Setup = TRUE; 621 msc->flags &= ~(TIOCM_DTR | TIOCM_RTS); 622 ms->OutFlush = TRUE; 623 } 624 } 625 } 626 } else { /* CD is now ON */ 627 #if DEBUG_CD 628 printf("msc%d: CD ON %d\n", unit, msc->port); 629 #endif 630 msc->flags |= TIOCM_CD; 631 if ((tp = msc_tty[MSCTTYSLOT(MSCSLOTUL(unit, i))]) && 632 (tp->t_state & TS_ISOPEN) && tp->t_wopen == 0) { 633 if (MSCDIALIN(tp->t_dev)) 634 tp->t_linesw->l_modem(tp, 1); 635 } /* if tp valid and port open */ 636 } /* CD on/off */ 637 } /* if CD changed for this line */ 638 ccd >>= 1; ncd >>= 1; /* bit for next line */ 639 } /* for every line */ 640 } /* while events in queue */ 641 msc->board->Common.CDStatus = ocd; /* save new status */ 642 msc->board->Common.CDTail = bufpos; /* remove events */ 643 splx(s); 644 } /* if events in CD queue */ 645 646 for (slot = MSCSLOTUL(unit, 0); slot < maxslot; slot++) { 647 msc = &mscdev[slot]; 648 649 if (!msc->active) 650 continue; 651 652 tp = msc_tty[MSCTTYSLOT(slot)]; 653 ms = &msc->board->Status[msc->port]; 654 655 newhead = ms->InHead; /* 65c02 write pointer */ 656 657 /* yoohoo, is the port open? */ 658 if (tp && (tp->t_state & TS_ISOPEN) && tp->t_wopen == 0) { 659 /* port is open, handle all type of events */ 660 661 /* set interrupt priority level */ 662 s = spltty(); 663 664 /* check for input for this port */ 665 if (newhead != (bufpos = ms->InTail)) { 666 /* buffer for input chars/events */ 667 ibuf = &msc->board->InBuf[msc->port][0]; 668 669 /* data types of bytes in ibuf */ 670 cbuf = &msc->board->InCtl[msc->port][0]; 671 672 /* do for all chars, if room */ 673 while (bufpos != newhead) { 674 /* which type of input data? */ 675 switch (cbuf[bufpos]) { 676 /* input event (CD, BREAK, etc.) */ 677 case MSCINCTL_EVENT: 678 switch (ibuf[bufpos++]) { 679 case MSCEVENT_Break: 680 tp->t_linesw->l_rint(TTY_FE, tp); 681 break; 682 683 default: 684 printf("msc%d: unknown event type %d\n", 685 msc->unit, ibuf[(bufpos-1)&0xff]); 686 } /* event type switch */ 687 break; 688 689 case MSCINCTL_CHAR: 690 if (tp->t_state & TS_TBLOCK) { 691 goto NoRoomForYa; 692 } 693 tp->t_linesw->l_rint((int)ibuf[bufpos++], tp); 694 break; 695 696 default: 697 printf("msc%d: unknown data type %d\n", 698 msc->unit, cbuf[bufpos]); 699 bufpos++; 700 } /* switch on input data type */ 701 } /* while there's something in the buffer */ 702 NoRoomForYa: 703 ms->InTail = bufpos; /* tell 65C02 what we've read */ 704 } /* if there was something in the buffer */ 705 706 /* we get here only when the port is open */ 707 /* send output */ 708 if (tp->t_state & (TS_BUSY|TS_FLUSH)) { 709 710 bufpos = ms->OutHead - ms->OutTail; 711 712 /* busy and below low water mark? */ 713 if (tp->t_state & TS_BUSY) { 714 if (bufpos < IOBUFLOWWATER) { 715 tp->t_state &= ~TS_BUSY; /* not busy any more */ 716 if (tp->t_linesw) 717 tp->t_linesw->l_start(tp); 718 else 719 mscstart(tp); 720 } 721 } 722 723 /* waiting for flush and buffer empty? */ 724 if (tp->t_state & TS_FLUSH) { 725 if (bufpos == 0) 726 tp->t_state &= ~TS_FLUSH; /* finished flushing */ 727 } 728 } /* BUSY or FLUSH */ 729 730 splx(s); 731 732 } else { /* End of port open */ 733 /* port is closed, don't pass on the chars from it */ 734 735 /* check for input for this port */ 736 if (newhead != (bufpos = ms->InTail)) { 737 /* buffer for input chars/events */ 738 ibuf = &msc->board->InBuf[msc->port][0]; 739 740 /* data types of bytes in ibuf */ 741 cbuf = &msc->board->InCtl[msc->port][0]; 742 743 /* do for all chars, if room */ 744 while (bufpos != newhead) { 745 /* which type of input data? */ 746 switch (cbuf[bufpos]) { 747 /* input event (BREAK, etc.) */ 748 case MSCINCTL_EVENT: 749 switch (ibuf[bufpos++]) { 750 default: 751 printf("msc: unknown event type %d\n", 752 ibuf[(bufpos-1)&0xff]); 753 } /* event type switch */ 754 break; 755 756 default: 757 bufpos++; 758 } /* switch on input data type */ 759 } /* while there's something in the buffer */ 760 761 ms->InTail = bufpos; /* tell 65C02 what we've read */ 762 } /* if there was something in the buffer */ 763 } /* End of port open/close */ 764 765 /* is this port closing? */ 766 if (msc->closing) { 767 /* if DTR is off, just bitbucket remaining characters */ 768 if ( (msc->flags & TIOCM_DTR) == 0) { 769 ms->OutFlush = TRUE; 770 msc->closing = FALSE; 771 } 772 /* if output has drained, drop DTR */ 773 else if (ms->OutHead == ms->OutTail) { 774 (void) mscmctl(tp->t_dev, 0, DMSET); 775 msc->closing = FALSE; 776 } 777 } 778 } /* For all ports */ 779 } 780 781 782 int 783 mscioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 784 { 785 register struct tty *tp; 786 register int slot; 787 register int error; 788 struct mscdevice *msc; 789 volatile struct mscstatus *ms; 790 int s; 791 792 /* get the device structure */ 793 slot = MSCSLOT(dev); 794 795 if (slot >= MSCSLOTS) 796 return ENXIO; 797 798 msc = &mscdev[slot]; 799 800 if (!msc->active) 801 return ENXIO; 802 803 ms = &msc->board->Status[msc->port]; 804 if (!(tp = msc_tty[MSCTTY(dev)])) 805 return ENXIO; 806 807 error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, l); 808 if (error != EPASSTHROUGH) 809 return (error); 810 811 error = ttioctl(tp, cmd, data, flag, l); 812 if (error != EPASSTHROUGH) 813 return (error); 814 815 switch (cmd) { 816 817 /* send break */ 818 case TIOCSBRK: 819 s = spltty(); 820 ms->Command = (ms->Command & (~MSCCMD_RTSMask)) | MSCCMD_Break; 821 ms->Setup = TRUE; 822 splx(s); 823 break; 824 825 /* clear break */ 826 case TIOCCBRK: 827 s = spltty(); 828 ms->Command = (ms->Command & (~MSCCMD_RTSMask)) | MSCCMD_RTSOn; 829 ms->Setup = TRUE; 830 splx(s); 831 break; 832 833 case TIOCSDTR: 834 (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIS); 835 break; 836 837 case TIOCCDTR: 838 if (!MSCDIALIN(dev)) /* don't let dialins drop DTR */ 839 (void) mscmctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIC); 840 break; 841 842 case TIOCMSET: 843 (void) mscmctl(dev, *(int *)data, DMSET); 844 break; 845 846 case TIOCMBIS: 847 (void) mscmctl(dev, *(int *)data, DMBIS); 848 break; 849 850 case TIOCMBIC: 851 if (MSCDIALIN(dev)) /* don't let dialins drop DTR */ 852 (void) mscmctl(dev, *(int *)data & TIOCM_DTR, DMBIC); 853 else 854 (void) mscmctl(dev, *(int *)data, DMBIC); 855 break; 856 857 case TIOCMGET: 858 *(int *)data = mscmctl(dev, 0, DMGET); 859 break; 860 861 case TIOCGFLAGS: 862 *(int *)data = SWFLAGS(dev); 863 break; 864 865 case TIOCSFLAGS: 866 error = generic_authorize(l->l_proc->p_cred, 867 KAUTH_GENERIC_ISSUSER, 868 &l->l_proc->p_acflag); 869 if (error != 0) 870 return(EPERM); 871 msc->openflags = *(int *)data; 872 /* only allow valid flags */ 873 msc->openflags &= 874 (TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | TIOCFLAG_CRTSCTS); 875 break; 876 877 default: 878 return (EPASSTHROUGH); 879 } 880 881 return (0); 882 } 883 884 885 int 886 mscparam(register struct tty *tp, register struct termios *t) 887 { 888 register int cflag = t->c_cflag; 889 struct mscdevice *msc; 890 volatile struct mscstatus *ms; 891 int s, slot; 892 int ospeed = ttspeedtab(t->c_ospeed, mscspeedtab); 893 894 /* get the device structure */ 895 slot = MSCSLOT(tp->t_dev); 896 897 if (slot >= MSCSLOTS) 898 return ENXIO; 899 900 msc = &mscdev[slot]; 901 902 if (!msc->active) 903 return ENXIO; 904 905 ms = &msc->board->Status[msc->port]; 906 907 /* check requested parameters */ 908 if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed)) 909 return (EINVAL); 910 911 /* and copy to tty */ 912 tp->t_ispeed = t->c_ispeed; 913 tp->t_ospeed = t->c_ospeed; 914 tp->t_cflag = cflag; 915 916 /* hang up if baud is zero */ 917 if (t->c_ospeed == 0) { 918 if (!MSCDIALIN(tp->t_dev)) /* don't let dialins drop DTR */ 919 (void) mscmctl(tp->t_dev, 0, DMSET); 920 } else { 921 /* set the baud rate */ 922 s = spltty(); 923 ms->Param = (ms->Param & ~MSCPARAM_BaudMask) | ospeed | MSCPARAM_RcvBaud; 924 925 /* 926 * Make sure any previous hangup is undone, ie. reenable DTR. 927 * also mscmctl will cause the speed to be set 928 */ 929 (void) mscmctl (tp->t_dev, TIOCM_DTR | TIOCM_RTS, DMSET); 930 931 splx(s); 932 } 933 934 return(0); 935 } 936 937 938 /* 939 * Jukka's code initializes alot of stuff that other drivers don't 940 * I'm including it here so that this code is a common set of work 941 * done by both of us. rfh 942 */ 943 int 944 mschwiflow(struct tty *tp, int flag) 945 { 946 947 /* Rob's version */ 948 #if 1 949 if (flag) 950 mscmctl( tp->t_dev, TIOCM_RTS, DMBIC); /* Clear/Lower RTS */ 951 else 952 mscmctl( tp->t_dev, TIOCM_RTS, DMBIS); /* Set/Raise RTS */ 953 954 #else /* Jukka's version */ 955 956 int s, slot; 957 struct mscdevice *msc; 958 volatile struct mscstatus *ms; 959 960 /* get the device structure */ 961 slot = MSCSLOT(tp->t_dev); 962 if (slot >= MSCSLOTS) 963 return ENXIO; 964 msc = &mscdev[slot]; 965 if (!msc->active) 966 return ENXIO; 967 ms = &msc->board->Status[msc->port]; 968 969 /* Well, we should really _do_ something here, but the 65c02 code 970 * manages the RTS signal on its own now, so... This will probably 971 * change in the future. 972 */ 973 #endif 974 return 1; 975 } 976 977 978 void 979 mscstart(register struct tty *tp) 980 { 981 register int cc; 982 register char *cp; 983 register int mhead; 984 int s, slot; 985 struct mscdevice *msc; 986 volatile struct mscstatus *ms; 987 volatile char *mob; 988 int hiwat = 0; 989 int maxout; 990 991 if (! (tp->t_state & TS_ISOPEN)) 992 return; 993 994 slot = MSCSLOT(tp->t_dev); 995 996 #if 0 997 printf("starting msc%d\n", slot); 998 #endif 999 1000 s = spltty(); 1001 1002 /* don't start if explicitly stopped */ 1003 if (tp->t_state & (TS_TIMEOUT|TS_TTSTOP)) 1004 goto out; 1005 1006 /* wake up if below low water */ 1007 cc = tp->t_outq.c_cc; 1008 1009 if (cc <= tp->t_lowat) { 1010 if (tp->t_state & TS_ASLEEP) { 1011 tp->t_state &= ~TS_ASLEEP; 1012 wakeup((caddr_t)&tp->t_outq); 1013 } 1014 selwakeup(&tp->t_wsel); 1015 } 1016 1017 /* don't bother if no characters or busy */ 1018 if (cc == 0 || (tp->t_state & TS_BUSY)) 1019 goto out; 1020 1021 /* 1022 * Limit the amount of output we do in one burst 1023 */ 1024 msc = &mscdev[slot]; 1025 ms = &msc->board->Status[msc->port]; 1026 mhead = ms->OutHead; 1027 maxout = mhead - ms->OutTail; 1028 1029 if (maxout < 0) 1030 maxout += IOBUFLEN; 1031 1032 maxout = IOBUFLEN - 1 - maxout; 1033 1034 if (cc >= maxout) { 1035 hiwat++; 1036 cc = maxout; 1037 } 1038 1039 cc = q_to_b (&tp->t_outq, msc->tmpbuf, cc); 1040 1041 if (cc > 0) { 1042 tp->t_state |= TS_BUSY; 1043 1044 mob = &msc->board->OutBuf[msc->port][0]; 1045 cp = &msc->tmpbuf[0]; 1046 1047 /* enable output */ 1048 ms->OutDisable = FALSE; 1049 1050 #if 0 1051 msc->tmpbuf[cc] = 0; 1052 printf("sending '%s'\n", msctmpbuf); 1053 #endif 1054 1055 /* send the first char across to reduce latency */ 1056 mob[mhead++] = *cp++; 1057 mhead &= IOBUFLENMASK; 1058 ms->OutHead = mhead; 1059 cc--; 1060 1061 /* copy the rest of the chars across quickly */ 1062 while (cc > 0) { 1063 mob[mhead++] = *cp++; 1064 mhead &= IOBUFLENMASK; 1065 cc--; 1066 } 1067 ms->OutHead = mhead; 1068 1069 /* leave the device busy if we've filled the buffer */ 1070 if (!hiwat) 1071 tp->t_state &= ~TS_BUSY; 1072 } 1073 1074 out: 1075 splx(s); 1076 } 1077 1078 1079 /* XXX */ 1080 /* 1081 * Stop output on a line. 1082 */ 1083 /*ARGSUSED*/ 1084 void 1085 mscstop(register struct tty *tp, int flag) 1086 /* flag variable defaulted to int anyway */ 1087 { 1088 register int s; 1089 #if 0 1090 struct mscdevice *msc; 1091 volatile struct mscstatus *ms; 1092 #endif 1093 1094 s = spltty(); 1095 if (tp->t_state & TS_BUSY) { 1096 if ((tp->t_state & TS_TTSTOP) == 0) { 1097 tp->t_state |= TS_FLUSH; 1098 #if 0 1099 msc = &mscdev[MSCSLOT(tp->t_dev)]; 1100 ms = &msc->board->Status[msc->port]; 1101 printf("stopped output on msc%d\n", MSCSLOT(tp->t_dev)); 1102 ms->OutDisable = TRUE; 1103 #endif 1104 } 1105 } 1106 splx(s); 1107 } 1108 1109 1110 /* 1111 * bits can be: TIOCM_DTR, TIOCM_RTS, TIOCM_CTS, TIOCM_CD, TIOCM_RI, TIOCM_DSR 1112 */ 1113 int 1114 mscmctl(dev_t dev, int bits, int how) 1115 { 1116 struct mscdevice *msc; 1117 volatile struct mscstatus *ms; 1118 int slot; 1119 int s; 1120 u_char newcmd; 1121 int OldFlags; 1122 1123 /* get the device structure */ 1124 slot = MSCSLOT(dev); 1125 1126 if (slot >= MSCSLOTS) 1127 return ENXIO; 1128 1129 msc = &mscdev[slot]; 1130 1131 if (!msc->active) 1132 return ENXIO; 1133 1134 s = spltty(); 1135 1136 if (how != DMGET) { 1137 OldFlags = msc->flags; 1138 bits &= TIOCM_DTR | TIOCM_RTS; /* can only modify DTR and RTS */ 1139 1140 switch (how) { 1141 case DMSET: 1142 msc->flags = (bits | (msc->flags & ~(TIOCM_DTR | TIOCM_RTS))); 1143 break; 1144 1145 case DMBIC: 1146 msc->flags &= ~bits; 1147 break; 1148 1149 case DMBIS: 1150 msc->flags |= bits; 1151 break; 1152 } 1153 1154 /* modify modem control state */ 1155 ms = &msc->board->Status[msc->port]; 1156 1157 if (msc->flags & TIOCM_RTS) /* was bits & */ 1158 newcmd = MSCCMD_RTSOn; 1159 else /* this doesn't actually work now */ 1160 newcmd = MSCCMD_RTSOff; 1161 1162 if (msc->flags & TIOCM_DTR) /* was bits & */ 1163 newcmd |= MSCCMD_Enable; 1164 1165 ms->Command = (ms->Command & (~MSCCMD_RTSMask & ~MSCCMD_Enable)) | newcmd; 1166 ms->Setup = TRUE; 1167 1168 /* if we've dropped DTR, bitbucket any pending output */ 1169 if ( (OldFlags & TIOCM_DTR) && ((bits & TIOCM_DTR) == 0)) 1170 ms->OutFlush = TRUE; 1171 } 1172 1173 bits = msc->flags; 1174 1175 (void) splx(s); 1176 1177 return(bits); 1178 } 1179 1180 1181 struct tty * 1182 msctty(dev_t dev) 1183 { 1184 return(msc_tty[MSCTTY(dev)]); 1185 } 1186 1187 1188 /* 1189 * Load JM's freely redistributable A2232 6502c code. Let turbo detector 1190 * run for a while too. 1191 */ 1192 1193 int 1194 mscinitcard(struct zbus_args *zap) 1195 { 1196 int bcount; 1197 short start; 1198 u_char *from; 1199 volatile u_char *to; 1200 volatile struct mscmemory *mlm; 1201 1202 mlm = (volatile struct mscmemory *)zap->va; 1203 (void)mlm->Enable6502Reset; 1204 1205 /* copy the code across to the board */ 1206 to = (volatile u_char *)mlm; 1207 from = msc6502code; bcount = sizeof(msc6502code) - 2; 1208 start = *(short *)from; from += sizeof(start); 1209 to += start; 1210 1211 while(bcount--) *to++ = *from++; 1212 1213 mlm->Common.Crystal = MSC_UNKNOWN; /* use automatic speed check */ 1214 1215 /* start 6502 running */ 1216 (void)mlm->ResetBoard; 1217 1218 /* wait until speed detector has finished */ 1219 for (bcount = 0; bcount < 200; bcount++) { 1220 delay(10000); 1221 if (mlm->Common.Crystal) 1222 break; 1223 } 1224 1225 return(0); 1226 } 1227 1228 #endif /* NMSC > 0 */ 1229
Indexes created Tue Sep 30 20:09:53 GMT 2025