1 /* $NetBSD: dhu.c,v 1.58 2022/10/26 23:46:37 riastradh Exp $ */ 2 /* 3 * Copyright (c) 2003, Hugh Graham. 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell and Rick Macklem. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1996 Ken C. Wellsch. All rights reserved. 37 * 38 * This code is derived from software contributed to Berkeley by 39 * Ralph Campbell and Rick Macklem. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed by the University of 52 * California, Berkeley and its contributors. 53 * 4. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 */ 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: dhu.c,v 1.58 2022/10/26 23:46:37 riastradh Exp $"); 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/ioctl.h> 76 #include <sys/tty.h> 77 #include <sys/proc.h> 78 #include <sys/buf.h> 79 #include <sys/conf.h> 80 #include <sys/file.h> 81 #include <sys/uio.h> 82 #include <sys/kernel.h> 83 #include <sys/syslog.h> 84 #include <sys/device.h> 85 #include <sys/kauth.h> 86 87 #include <sys/bus.h> 88 #include <machine/scb.h> 89 90 #include <dev/qbus/ubavar.h> 91 92 #include <dev/qbus/dhureg.h> 93 94 #include "ioconf.h" 95 96 /* A DHU-11 has 16 ports while a DHV-11 has only 8. We use 16 by default */ 97 98 #define NDHULINE 16 99 100 #define DHU_M2U(c) ((c)>>4) /* convert minor(dev) to unit # */ 101 #define DHU_LINE(u) ((u)&0xF) /* extract line # from minor(dev) */ 102 103 struct dhu_softc { 104 device_t sc_dev; /* Device struct used by config */ 105 struct evcnt sc_rintrcnt; /* Interrupt statistics */ 106 struct evcnt sc_tintrcnt; /* Interrupt statistics */ 107 int sc_type; /* controller type, DHU or DHV */ 108 int sc_lines; /* number of lines */ 109 bus_space_tag_t sc_iot; 110 bus_space_handle_t sc_ioh; 111 bus_dma_tag_t sc_dmat; 112 struct { 113 struct tty *dhu_tty; /* what we work on */ 114 bus_dmamap_t dhu_dmah; 115 int dhu_state; /* to manage TX output status */ 116 short dhu_cc; /* character count on TX */ 117 short dhu_modem; /* modem bits state */ 118 } sc_dhu[NDHULINE]; 119 }; 120 121 #define IS_DHU 16 /* Unibus DHU-11 board linecount */ 122 #define IS_DHV 8 /* Q-bus DHV-11 or DHQ-11 */ 123 124 #define STATE_IDLE 000 /* no current output in progress */ 125 #define STATE_DMA_RUNNING 001 /* DMA TX in progress */ 126 #define STATE_DMA_STOPPED 002 /* DMA TX was aborted */ 127 #define STATE_TX_ONE_CHAR 004 /* did a single char directly */ 128 129 /* Flags used to monitor modem bits, make them understood outside driver */ 130 131 #define DML_DTR TIOCM_DTR 132 #define DML_RTS TIOCM_RTS 133 #define DML_CTS TIOCM_CTS 134 #define DML_DCD TIOCM_CD 135 #define DML_RI TIOCM_RI 136 #define DML_DSR TIOCM_DSR 137 #define DML_BRK 0100000 /* no equivalent, we will mask */ 138 139 #define DHU_READ_WORD(reg) \ 140 bus_space_read_2(sc->sc_iot, sc->sc_ioh, reg) 141 #define DHU_WRITE_WORD(reg, val) \ 142 bus_space_write_2(sc->sc_iot, sc->sc_ioh, reg, val) 143 #define DHU_READ_BYTE(reg) \ 144 bus_space_read_1(sc->sc_iot, sc->sc_ioh, reg) 145 #define DHU_WRITE_BYTE(reg, val) \ 146 bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val) 147 148 149 /* On a stock DHV, channel pairs (0/1, 2/3, etc.) must use */ 150 /* a baud rate from the same group. So limiting to B is likely */ 151 /* best, although clone boards like the ABLE QHV allow all settings. */ 152 153 static const struct speedtab dhuspeedtab[] = { 154 { 0, 0 }, /* Groups */ 155 { 50, DHU_LPR_B50 }, /* A */ 156 { 75, DHU_LPR_B75 }, /* B */ 157 { 110, DHU_LPR_B110 }, /* A and B */ 158 { 134, DHU_LPR_B134 }, /* A and B */ 159 { 150, DHU_LPR_B150 }, /* B */ 160 { 300, DHU_LPR_B300 }, /* A and B */ 161 { 600, DHU_LPR_B600 }, /* A and B */ 162 { 1200, DHU_LPR_B1200 }, /* A and B */ 163 { 1800, DHU_LPR_B1800 }, /* B */ 164 { 2000, DHU_LPR_B2000 }, /* B */ 165 { 2400, DHU_LPR_B2400 }, /* A and B */ 166 { 4800, DHU_LPR_B4800 }, /* A and B */ 167 { 7200, DHU_LPR_B7200 }, /* A */ 168 { 9600, DHU_LPR_B9600 }, /* A and B */ 169 { 19200, DHU_LPR_B19200 }, /* B */ 170 { 38400, DHU_LPR_B38400 }, /* A */ 171 { -1, -1 } 172 }; 173 174 static int dhu_match(device_t, cfdata_t, void *); 175 static void dhu_attach(device_t, device_t, void *); 176 static void dhurint(void *); 177 static void dhuxint(void *); 178 static void dhustart(struct tty *); 179 static int dhuparam(struct tty *, struct termios *); 180 static int dhuiflow(struct tty *, int); 181 static unsigned dhumctl(struct dhu_softc *,int, int, int); 182 183 CFATTACH_DECL_NEW(dhu, sizeof(struct dhu_softc), 184 dhu_match, dhu_attach, NULL, NULL); 185 186 static dev_type_open(dhuopen); 187 static dev_type_close(dhuclose); 188 static dev_type_read(dhuread); 189 static dev_type_write(dhuwrite); 190 static dev_type_ioctl(dhuioctl); 191 static dev_type_stop(dhustop); 192 static dev_type_tty(dhutty); 193 static dev_type_poll(dhupoll); 194 195 const struct cdevsw dhu_cdevsw = { 196 .d_open = dhuopen, 197 .d_close = dhuclose, 198 .d_read = dhuread, 199 .d_write = dhuwrite, 200 .d_ioctl = dhuioctl, 201 .d_stop = dhustop, 202 .d_tty = dhutty, 203 .d_poll = dhupoll, 204 .d_mmap = nommap, 205 .d_kqfilter = ttykqfilter, 206 .d_discard = nodiscard, 207 .d_flag = D_TTY 208 }; 209 210 /* Autoconfig handles: setup the controller to interrupt, */ 211 /* then complete the housecleaning for full operation */ 212 213 static int 214 dhu_match(device_t parent, cfdata_t cf, void *aux) 215 { 216 struct uba_attach_args *ua = aux; 217 int n; 218 219 /* Reset controller to initialize, enable TX/RX interrupts */ 220 /* to catch floating vector info elsewhere when completed */ 221 222 bus_space_write_2(ua->ua_iot, ua->ua_ioh, DHU_UBA_CSR, 223 DHU_CSR_MASTER_RESET | DHU_CSR_RXIE | DHU_CSR_TXIE); 224 225 /* Now wait up to 3 seconds for self-test to complete. */ 226 227 for (n = 0; n < 300; n++) { 228 DELAY(10000); 229 if ((bus_space_read_2(ua->ua_iot, ua->ua_ioh, DHU_UBA_CSR) & 230 DHU_CSR_MASTER_RESET) == 0) 231 break; 232 } 233 234 /* If the RESET did not clear after 3 seconds, */ 235 /* the controller must be broken. */ 236 237 if (n >= 300) 238 return 0; 239 240 /* Check whether diagnostic run has signalled a failure. */ 241 242 if ((bus_space_read_2(ua->ua_iot, ua->ua_ioh, DHU_UBA_CSR) & 243 DHU_CSR_DIAG_FAIL) != 0) 244 return 0; 245 246 return 1; 247 } 248 249 static void 250 dhu_attach(device_t parent, device_t self, void *aux) 251 { 252 struct dhu_softc *sc = device_private(self); 253 struct uba_attach_args *ua = aux; 254 unsigned c; 255 int n, i; 256 257 sc->sc_dev = self; 258 sc->sc_iot = ua->ua_iot; 259 sc->sc_ioh = ua->ua_ioh; 260 sc->sc_dmat = ua->ua_dmat; 261 /* Process the 8 bytes of diagnostic info put into */ 262 /* the FIFO following the master reset operation. */ 263 264 aprint_normal("\n"); 265 for (n = 0; n < 8; n++) { 266 c = DHU_READ_WORD(DHU_UBA_RBUF); 267 268 if ((c&DHU_DIAG_CODE) == DHU_DIAG_CODE) { 269 if ((c&0200) == 0000) 270 aprint_error_dev(self, "rom(%d) version %d\n", 271 ((c>>1)&01), ((c>>2)&037)); 272 else if (((c>>2)&07) != 0) 273 aprint_error_dev(self, "diag-error(proc%d)=%x\n", 274 ((c>>1)&01), ((c>>2)&07)); 275 } 276 } 277 278 c = DHU_READ_WORD(DHU_UBA_STAT); 279 280 sc->sc_type = (c & DHU_STAT_DHU)? IS_DHU: IS_DHV; 281 282 sc->sc_lines = 8; /* default */ 283 if (sc->sc_type == IS_DHU && (c & DHU_STAT_MDL)) 284 sc->sc_lines = 16; 285 286 aprint_normal_dev(self, "DH%s-11\n", 287 sc->sc_type == IS_DHU ? "U" : "V"); 288 289 for (i = 0; i < sc->sc_lines; i++) { 290 struct tty *tp; 291 292 tp = sc->sc_dhu[i].dhu_tty = tty_alloc(); 293 sc->sc_dhu[i].dhu_state = STATE_IDLE; 294 bus_dmamap_create(sc->sc_dmat, tp->t_outq.c_cn, 1, 295 tp->t_outq.c_cn, 0, BUS_DMA_ALLOCNOW|BUS_DMA_NOWAIT, 296 &sc->sc_dhu[i].dhu_dmah); 297 bus_dmamap_load(sc->sc_dmat, sc->sc_dhu[i].dhu_dmah, 298 tp->t_outq.c_cs, tp->t_outq.c_cn, 0, BUS_DMA_NOWAIT); 299 300 } 301 302 /* Now establish RX & TX interrupt handlers */ 303 304 uba_intr_establish(ua->ua_icookie, ua->ua_cvec, 305 dhurint, sc, &sc->sc_rintrcnt); 306 uba_intr_establish(ua->ua_icookie, ua->ua_cvec + 4, 307 dhuxint, sc, &sc->sc_tintrcnt); 308 evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 309 device_xname(sc->sc_dev), "rintr"); 310 evcnt_attach_dynamic(&sc->sc_tintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 311 device_xname(sc->sc_dev), "tintr"); 312 } 313 314 /* Receiver Interrupt */ 315 316 static void 317 dhurint(void *arg) 318 { 319 struct dhu_softc *sc = arg; 320 struct tty *tp; 321 int cc, line; 322 unsigned c, delta; 323 int overrun = 0; 324 325 while ((c = DHU_READ_WORD(DHU_UBA_RBUF)) & DHU_RBUF_DATA_VALID) { 326 327 /* Ignore diagnostic FIFO entries. */ 328 329 if ((c & DHU_DIAG_CODE) == DHU_DIAG_CODE) 330 continue; 331 332 cc = c & 0xFF; 333 line = DHU_LINE(c>>8); 334 tp = sc->sc_dhu[line].dhu_tty; 335 336 /* LINK.TYPE is set so we get modem control FIFO entries */ 337 338 if ((c & DHU_DIAG_CODE) == DHU_MODEM_CODE) { 339 c = (c << 8); 340 /* Do MDMBUF flow control, wakeup sleeping opens */ 341 if (c & DHU_STAT_DCD) { 342 if (!(tp->t_state & TS_CARR_ON)) 343 (void)(*tp->t_linesw->l_modem)(tp, 1); 344 } 345 else if ((tp->t_state & TS_CARR_ON) && 346 (*tp->t_linesw->l_modem)(tp, 0) == 0) 347 (void) dhumctl(sc, line, 0, DMSET); 348 349 /* Do CRTSCTS flow control */ 350 delta = c ^ sc->sc_dhu[line].dhu_modem; 351 sc->sc_dhu[line].dhu_modem = c; 352 if ((delta & DHU_STAT_CTS) && 353 (tp->t_state & TS_ISOPEN) && 354 (tp->t_cflag & CRTSCTS)) { 355 if (c & DHU_STAT_CTS) { 356 tp->t_state &= ~TS_TTSTOP; 357 ttstart(tp); 358 } else { 359 tp->t_state |= TS_TTSTOP; 360 dhustop(tp, 0); 361 } 362 } 363 continue; 364 } 365 366 if (!(tp->t_state & TS_ISOPEN)) { 367 cv_broadcast(&tp->t_rawcv); 368 continue; 369 } 370 371 if ((c & DHU_RBUF_OVERRUN_ERR) && overrun == 0) { 372 log(LOG_WARNING, "%s: silo overflow, line %d\n", 373 device_xname(sc->sc_dev), line); 374 overrun = 1; 375 } 376 /* A BREAK key will appear as a NULL with a framing error */ 377 if (c & DHU_RBUF_FRAMING_ERR) 378 cc |= TTY_FE; 379 if (c & DHU_RBUF_PARITY_ERR) 380 cc |= TTY_PE; 381 382 (*tp->t_linesw->l_rint)(cc, tp); 383 } 384 } 385 386 /* Transmitter Interrupt */ 387 388 static void 389 dhuxint(void *arg) 390 { 391 struct dhu_softc *sc = arg; 392 struct tty *tp; 393 int line, i; 394 395 while ((i = DHU_READ_BYTE(DHU_UBA_CSR_HI)) & (DHU_CSR_TX_ACTION >> 8)) { 396 397 line = DHU_LINE(i); 398 tp = sc->sc_dhu[line].dhu_tty; 399 400 if (i & (DHU_CSR_TX_DMA_ERROR >> 8)) 401 printf("%s: DMA ERROR on line: %d\n", 402 device_xname(sc->sc_dev), line); 403 if (i & (DHU_CSR_DIAG_FAIL >> 8)) 404 printf("%s: DIAG FAIL on line: %d\n", 405 device_xname(sc->sc_dev), line); 406 407 tp->t_state &= ~TS_BUSY; 408 if (tp->t_state & TS_FLUSH) 409 tp->t_state &= ~TS_FLUSH; 410 else { 411 if (sc->sc_dhu[line].dhu_state == STATE_DMA_STOPPED) 412 sc->sc_dhu[line].dhu_cc -= 413 DHU_READ_WORD(DHU_UBA_TBUFCNT); 414 ndflush(&tp->t_outq, sc->sc_dhu[line].dhu_cc); 415 sc->sc_dhu[line].dhu_cc = 0; 416 } 417 418 sc->sc_dhu[line].dhu_state = STATE_IDLE; 419 420 (*tp->t_linesw->l_start)(tp); 421 } 422 } 423 424 int 425 dhuopen(dev_t dev, int flag, int mode, struct lwp *l) 426 { 427 struct tty *tp; 428 int unit, line; 429 struct dhu_softc *sc; 430 int error = 0; 431 432 unit = DHU_M2U(minor(dev)); 433 line = DHU_LINE(minor(dev)); 434 435 sc = device_lookup_private(&dhu_cd, unit); 436 if (!sc) 437 return (ENXIO); 438 439 if (line >= sc->sc_lines) 440 return ENXIO; 441 442 tp = sc->sc_dhu[line].dhu_tty; 443 ttylock(tp); 444 if (sc->sc_type == IS_DHU) { 445 /* CSR 3:0 must be 0 */ 446 DHU_WRITE_BYTE(DHU_UBA_CSR, DHU_CSR_RXIE); 447 /* RX int delay 10ms */ 448 DHU_WRITE_BYTE(DHU_UBA_RXTIME, 10); 449 } 450 DHU_WRITE_BYTE(DHU_UBA_CSR, DHU_CSR_RXIE | line); 451 sc->sc_dhu[line].dhu_modem = DHU_READ_WORD(DHU_UBA_STAT); 452 453 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 454 return (EBUSY); 455 456 tp->t_oproc = dhustart; 457 tp->t_param = dhuparam; 458 tp->t_hwiflow = dhuiflow; 459 tp->t_dev = dev; 460 461 if ((tp->t_state & TS_ISOPEN) == 0) { 462 ttychars(tp); 463 if (tp->t_ispeed == 0) { 464 tp->t_iflag = TTYDEF_IFLAG; 465 tp->t_oflag = TTYDEF_OFLAG; 466 tp->t_cflag = TTYDEF_CFLAG; 467 tp->t_lflag = TTYDEF_LFLAG; 468 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 469 } 470 (void) dhuparam(tp, &tp->t_termios); 471 ttsetwater(tp); 472 } 473 /* Use DMBIS and *not* DMSET or else we clobber incoming bits */ 474 if (dhumctl(sc, line, DML_DTR|DML_RTS, DMBIS) & DML_DCD) 475 tp->t_state |= TS_CARR_ON; 476 while (!(flag & O_NONBLOCK) && !(tp->t_cflag & CLOCAL) && 477 !(tp->t_state & TS_CARR_ON)) { 478 tp->t_wopen++; 479 error = ttysleep(tp, &tp->t_rawcv, true, 0); 480 tp->t_wopen--; 481 if (error) 482 break; 483 } 484 ttyunlock(tp); 485 if (error) 486 return (error); 487 return ((*tp->t_linesw->l_open)(dev, tp)); 488 } 489 490 /*ARGSUSED*/ 491 int 492 dhuclose(dev_t dev, int flag, int mode, struct lwp *l) 493 { 494 const int unit = DHU_M2U(minor(dev)); 495 const int line = DHU_LINE(minor(dev)); 496 struct dhu_softc *sc = device_lookup_private(&dhu_cd, unit); 497 struct tty *tp = sc->sc_dhu[line].dhu_tty; 498 499 (*tp->t_linesw->l_close)(tp, flag); 500 501 /* Make sure a BREAK state is not left enabled. */ 502 503 (void) dhumctl(sc, line, DML_BRK, DMBIC); 504 505 /* Do a hangup if so required. */ 506 507 if ((tp->t_cflag & HUPCL) || tp->t_wopen || !(tp->t_state & TS_ISOPEN)) 508 (void) dhumctl(sc, line, 0, DMSET); 509 510 return (ttyclose(tp)); 511 } 512 513 int 514 dhuread(dev_t dev, struct uio *uio, int flag) 515 { 516 struct dhu_softc *sc = device_lookup_private(&dhu_cd, DHU_M2U(minor(dev))); 517 struct tty *tp = sc->sc_dhu[DHU_LINE(minor(dev))].dhu_tty; 518 519 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 520 } 521 522 int 523 dhuwrite(dev_t dev, struct uio *uio, int flag) 524 { 525 struct dhu_softc *sc = device_lookup_private(&dhu_cd, DHU_M2U(minor(dev))); 526 struct tty *tp = sc->sc_dhu[DHU_LINE(minor(dev))].dhu_tty; 527 528 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 529 } 530 531 int 532 dhupoll(dev_t dev, int events, struct lwp *l) 533 { 534 struct dhu_softc *sc = device_lookup_private(&dhu_cd, DHU_M2U(minor(dev))); 535 struct tty *tp = sc->sc_dhu[DHU_LINE(minor(dev))].dhu_tty; 536 537 return ((*tp->t_linesw->l_poll)(tp, events, l)); 538 } 539 540 /*ARGSUSED*/ 541 int 542 dhuioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 543 { 544 const int unit = DHU_M2U(minor(dev)); 545 const int line = DHU_LINE(minor(dev)); 546 struct dhu_softc *sc = device_lookup_private(&dhu_cd, unit); 547 struct tty *tp = sc->sc_dhu[line].dhu_tty; 548 int error; 549 550 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 551 if (error != EPASSTHROUGH) 552 return (error); 553 554 error = ttioctl(tp, cmd, data, flag, l); 555 if (error != EPASSTHROUGH) 556 return (error); 557 558 switch (cmd) { 559 560 case TIOCSBRK: 561 (void) dhumctl(sc, line, DML_BRK, DMBIS); 562 break; 563 564 case TIOCCBRK: 565 (void) dhumctl(sc, line, DML_BRK, DMBIC); 566 break; 567 568 case TIOCSDTR: 569 (void) dhumctl(sc, line, DML_DTR|DML_RTS, DMBIS); 570 break; 571 572 case TIOCCDTR: 573 (void) dhumctl(sc, line, DML_DTR|DML_RTS, DMBIC); 574 break; 575 576 case TIOCMSET: 577 (void) dhumctl(sc, line, *(int *)data, DMSET); 578 break; 579 580 case TIOCMBIS: 581 (void) dhumctl(sc, line, *(int *)data, DMBIS); 582 break; 583 584 case TIOCMBIC: 585 (void) dhumctl(sc, line, *(int *)data, DMBIC); 586 break; 587 588 case TIOCMGET: 589 *(int *)data = (dhumctl(sc, line, 0, DMGET) & ~DML_BRK); 590 break; 591 592 default: 593 return (EPASSTHROUGH); 594 } 595 return (0); 596 } 597 598 struct tty * 599 dhutty(dev_t dev) 600 { 601 struct dhu_softc *sc = device_lookup_private(&dhu_cd, DHU_M2U(minor(dev))); 602 603 return sc->sc_dhu[DHU_LINE(minor(dev))].dhu_tty; 604 } 605 606 /*ARGSUSED*/ 607 void 608 dhustop(struct tty *tp, int flag) 609 { 610 int s; 611 612 s = spltty(); 613 614 if (tp->t_state & TS_BUSY) { 615 const int unit = DHU_M2U(minor(tp->t_dev)); 616 const int line = DHU_LINE(minor(tp->t_dev)); 617 struct dhu_softc *sc = device_lookup_private(&dhu_cd, unit); 618 619 if (sc->sc_dhu[line].dhu_state == STATE_DMA_RUNNING) { 620 621 sc->sc_dhu[line].dhu_state = STATE_DMA_STOPPED; 622 623 DHU_WRITE_BYTE(DHU_UBA_CSR, DHU_CSR_RXIE | line); 624 DHU_WRITE_WORD(DHU_UBA_LNCTRL, 625 DHU_READ_WORD(DHU_UBA_LNCTRL) | 626 DHU_LNCTRL_DMA_ABORT); 627 } 628 629 if (!(tp->t_state & TS_TTSTOP)) 630 tp->t_state |= TS_FLUSH; 631 } 632 (void) splx(s); 633 } 634 635 static void 636 dhustart(struct tty *tp) 637 { 638 struct dhu_softc *sc; 639 int line, cc; 640 int addr; 641 int s; 642 643 s = spltty(); 644 if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) 645 goto out; 646 if (!ttypull(tp)) 647 goto out; 648 cc = ndqb(&tp->t_outq, 0); 649 if (cc == 0) 650 goto out; 651 652 tp->t_state |= TS_BUSY; 653 654 sc = device_lookup_private(&dhu_cd,DHU_M2U(minor(tp->t_dev))); 655 656 line = DHU_LINE(minor(tp->t_dev)); 657 658 DHU_WRITE_BYTE(DHU_UBA_CSR, DHU_CSR_RXIE | line); 659 660 sc->sc_dhu[line].dhu_cc = cc; 661 662 if (cc == 1 && sc->sc_type == IS_DHV) { 663 664 sc->sc_dhu[line].dhu_state = STATE_TX_ONE_CHAR; 665 666 DHU_WRITE_WORD(DHU_UBA_TXCHAR, 667 DHU_TXCHAR_DATA_VALID | *tp->t_outq.c_cf); 668 669 } else { 670 671 sc->sc_dhu[line].dhu_state = STATE_DMA_RUNNING; 672 673 addr = sc->sc_dhu[line].dhu_dmah->dm_segs[0].ds_addr + 674 (tp->t_outq.c_cf - tp->t_outq.c_cs); 675 676 DHU_WRITE_WORD(DHU_UBA_TBUFCNT, cc); 677 DHU_WRITE_WORD(DHU_UBA_TBUFAD1, addr & 0xFFFF); 678 DHU_WRITE_WORD(DHU_UBA_TBUFAD2, ((addr>>16) & 0x3F) | 679 DHU_TBUFAD2_TX_ENABLE); 680 DHU_WRITE_WORD(DHU_UBA_LNCTRL, 681 DHU_READ_WORD(DHU_UBA_LNCTRL) & ~DHU_LNCTRL_DMA_ABORT); 682 DHU_WRITE_WORD(DHU_UBA_TBUFAD2, 683 DHU_READ_WORD(DHU_UBA_TBUFAD2) | DHU_TBUFAD2_DMA_START); 684 } 685 out: 686 (void) splx(s); 687 return; 688 } 689 690 static int 691 dhuparam(struct tty *tp, struct termios *t) 692 { 693 int cflag = t->c_cflag; 694 int ispeed = ttspeedtab(t->c_ispeed, dhuspeedtab); 695 int ospeed = ttspeedtab(t->c_ospeed, dhuspeedtab); 696 unsigned int lpr; 697 unsigned int lnctrl; 698 const int unit = DHU_M2U(minor(tp->t_dev)); 699 const int line = DHU_LINE(minor(tp->t_dev)); 700 struct dhu_softc * const sc = device_lookup_private(&dhu_cd, unit); 701 int s; 702 703 704 /* check requested parameters */ 705 if (ospeed < 0 || ispeed < 0) 706 return (EINVAL); 707 708 tp->t_ispeed = t->c_ispeed; 709 tp->t_ospeed = t->c_ospeed; 710 tp->t_cflag = cflag; 711 712 if (ospeed == 0) { 713 (void) dhumctl(sc, line, 0, DMSET); /* hang up line */ 714 return (0); 715 } 716 717 s = spltty(); 718 DHU_WRITE_BYTE(DHU_UBA_CSR, DHU_CSR_RXIE | line); 719 720 lpr = ((ispeed&017)<<8) | ((ospeed&017)<<12) ; 721 722 switch (cflag & CSIZE) { 723 724 case CS5: 725 lpr |= DHU_LPR_5_BIT_CHAR; 726 break; 727 728 case CS6: 729 lpr |= DHU_LPR_6_BIT_CHAR; 730 break; 731 732 case CS7: 733 lpr |= DHU_LPR_7_BIT_CHAR; 734 break; 735 736 default: 737 lpr |= DHU_LPR_8_BIT_CHAR; 738 break; 739 } 740 741 if (cflag & PARENB) 742 lpr |= DHU_LPR_PARENB; 743 if (!(cflag & PARODD)) 744 lpr |= DHU_LPR_EPAR; 745 if (cflag & CSTOPB) 746 lpr |= DHU_LPR_2_STOP; 747 748 DHU_WRITE_WORD(DHU_UBA_LPR, lpr); 749 750 DHU_WRITE_WORD(DHU_UBA_TBUFAD2, 751 DHU_READ_WORD(DHU_UBA_TBUFAD2) | DHU_TBUFAD2_TX_ENABLE); 752 753 lnctrl = DHU_READ_WORD(DHU_UBA_LNCTRL); 754 755 /* Setting LINK.TYPE enables modem signal change interrupts. */ 756 757 lnctrl |= (DHU_LNCTRL_RX_ENABLE | DHU_LNCTRL_LINK_TYPE); 758 759 /* Enable the auto XON/XOFF feature on the controller */ 760 761 if (t->c_iflag & IXON) 762 lnctrl |= DHU_LNCTRL_OAUTO; 763 else 764 lnctrl &= ~DHU_LNCTRL_OAUTO; 765 766 if (t->c_iflag & IXOFF) 767 lnctrl |= DHU_LNCTRL_IAUTO; 768 else 769 lnctrl &= ~DHU_LNCTRL_IAUTO; 770 771 DHU_WRITE_WORD(DHU_UBA_LNCTRL, lnctrl); 772 773 (void) splx(s); 774 return (0); 775 } 776 777 static int 778 dhuiflow(struct tty *tp, int flag) 779 { 780 781 if (tp->t_cflag & CRTSCTS) { 782 const int unit = DHU_M2U(minor(tp->t_dev)); 783 const int line = DHU_LINE(minor(tp->t_dev)); 784 struct dhu_softc * const sc = device_lookup_private(&dhu_cd, unit); 785 (void) dhumctl(sc, line, DML_RTS, ((flag)? DMBIC: DMBIS)); 786 return (1); 787 } 788 return (0); 789 } 790 791 static unsigned int 792 dhumctl(struct dhu_softc *sc, int line, int bits, int how) 793 { 794 unsigned status; 795 unsigned lnctrl; 796 unsigned mbits; 797 int s; 798 799 s = spltty(); 800 801 DHU_WRITE_BYTE(DHU_UBA_CSR, DHU_CSR_RXIE | line); 802 803 mbits = 0; 804 805 /* external signals as seen from the port */ 806 807 status = DHU_READ_WORD(DHU_UBA_STAT); 808 809 if (status & DHU_STAT_CTS) 810 mbits |= DML_CTS; 811 812 if (status & DHU_STAT_DCD) 813 mbits |= DML_DCD; 814 815 if (status & DHU_STAT_DSR) 816 mbits |= DML_DSR; 817 818 if (status & DHU_STAT_RI) 819 mbits |= DML_RI; 820 821 /* internal signals/state delivered to port */ 822 823 lnctrl = DHU_READ_WORD(DHU_UBA_LNCTRL); 824 825 if (lnctrl & DHU_LNCTRL_RTS) 826 mbits |= DML_RTS; 827 828 if (lnctrl & DHU_LNCTRL_DTR) 829 mbits |= DML_DTR; 830 831 if (lnctrl & DHU_LNCTRL_BREAK) 832 mbits |= DML_BRK; 833 834 switch (how) { 835 836 case DMSET: 837 mbits = bits; 838 break; 839 840 case DMBIS: 841 mbits |= bits; 842 break; 843 844 case DMBIC: 845 mbits &= ~bits; 846 break; 847 848 case DMGET: 849 (void) splx(s); 850 return (mbits); 851 } 852 853 if (mbits & DML_RTS) 854 lnctrl |= DHU_LNCTRL_RTS; 855 else 856 lnctrl &= ~DHU_LNCTRL_RTS; 857 858 if (mbits & DML_DTR) 859 lnctrl |= DHU_LNCTRL_DTR; 860 else 861 lnctrl &= ~DHU_LNCTRL_DTR; 862 863 if (mbits & DML_BRK) 864 lnctrl |= DHU_LNCTRL_BREAK; 865 else 866 lnctrl &= ~DHU_LNCTRL_BREAK; 867 868 DHU_WRITE_WORD(DHU_UBA_LNCTRL, lnctrl); 869 870 (void) splx(s); 871 return (mbits); 872 } 873
Indexes created Mon Sep 22 05:09:51 GMT 2025