txcom.c revision 1.53
1 /* $NetBSD: txcom.c,v 1.53 2024/09/23 19:11:34 andvar Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: txcom.c,v 1.53 2024/09/23 19:11:34 andvar Exp $"); 34 35 #include "opt_tx39uart_debug.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/device.h> 41 #include <sys/kmem.h> 42 #include <sys/kauth.h> 43 44 #include <sys/proc.h> /* tsleep/wakeup */ 45 46 #include <sys/ioctl.h> 47 #include <sys/select.h> 48 #include <sys/file.h> 49 50 #include <sys/tty.h> 51 #include <sys/conf.h> 52 #include <dev/cons.h> /* consdev */ 53 54 #include <machine/bus.h> 55 #include <machine/config_hook.h> 56 57 #include <hpcmips/tx/tx39var.h> 58 #include <hpcmips/tx/tx39icureg.h> 59 #include <hpcmips/tx/tx39uartvar.h> 60 #include <hpcmips/tx/tx39uartreg.h> 61 62 #include <hpcmips/tx/tx39irvar.h> 63 64 #include <hpcmips/tx/tx39clockreg.h> /* XXX */ 65 66 /* 67 * UARTA channel has DTR, DSR, RTS, CTS lines. and they wired to MFIO/IO port. 68 */ 69 #define IS_COM0(s) ((s) == 0) 70 #define IS_COM1(s) ((s) == 1) 71 #define ON ((void *)1) 72 #define OFF ((void *)0) 73 74 #ifdef TX39UART_DEBUG 75 #define DPRINTF_ENABLE 76 #define DPRINTF_DEBUG tx39uart_debug 77 #endif 78 #include <machine/debug.h> 79 80 #define TXCOM_HW_CONSOLE 0x40 81 #define TXCOM_RING_SIZE 256 /* must be a power of two! */ 82 #define TXCOM_RING_MASK (TXCOM_RING_SIZE - 1) 83 84 struct txcom_chip { 85 tx_chipset_tag_t sc_tc; 86 int sc_slot; /* UARTA or UARTB */ 87 int sc_cflag; 88 int sc_speed; 89 int sc_swflags; 90 int sc_hwflags; 91 92 int sc_dcd; 93 int sc_msr_cts; 94 int sc_tx_stopped; 95 }; 96 97 struct txcom_softc { 98 struct tty *sc_tty; 99 struct txcom_chip *sc_chip; 100 101 void *sc_txsoft_cookie; 102 void *sc_rxsoft_cookie; 103 104 u_int8_t *sc_tba; /* transmit buffer address */ 105 int sc_tbc; /* transmit byte count */ 106 int sc_heldtbc; 107 u_int8_t *sc_rbuf; /* receive buffer address */ 108 int sc_rbput; /* receive byte count */ 109 int sc_rbget; 110 }; 111 112 extern struct cfdriver txcom_cd; 113 114 int txcom_match(device_t, cfdata_t, void *); 115 void txcom_attach(device_t, device_t, void *); 116 int txcom_print(void *, const char *); 117 118 int txcom_txintr(void *); 119 int txcom_rxintr(void *); 120 int txcom_frameerr_intr(void *); 121 int txcom_parityerr_intr(void *); 122 int txcom_break_intr(void *); 123 124 void txcom_rxsoft(void *); 125 void txcom_txsoft(void *); 126 127 int txcom_stsoft(void *); 128 int txcom_stsoft2(void *); 129 int txcom_stsoft3(void *); 130 int txcom_stsoft4(void *); 131 132 133 void txcom_shutdown(struct txcom_softc *); 134 void txcom_break(struct txcom_softc *, int); 135 void txcom_modem(struct txcom_softc *, int); 136 void txcomstart(struct tty *); 137 int txcomparam(struct tty *, struct termios *); 138 139 void txcom_reset (struct txcom_chip *); 140 int txcom_enable (struct txcom_chip *, bool); 141 void txcom_disable (struct txcom_chip *); 142 void txcom_setmode (struct txcom_chip *); 143 void txcom_setbaudrate(struct txcom_chip *); 144 int txcom_cngetc (dev_t); 145 void txcom_cnputc (dev_t, int); 146 void txcom_cnpollc (dev_t, int); 147 148 int txcom_dcd_hook(void *, int, long, void *); 149 int txcom_cts_hook(void *, int, long, void *); 150 151 152 inline int __txcom_txbufready(struct txcom_chip *, int); 153 const char *__txcom_slotname(int); 154 155 #ifdef TX39UARTDEBUG 156 void txcom_dump(struct txcom_chip *); 157 #endif 158 159 struct consdev txcomcons = { 160 NULL, NULL, txcom_cngetc, txcom_cnputc, txcom_cnpollc, NULL, NULL, 161 NULL, NODEV, CN_NORMAL 162 }; 163 164 /* Serial console */ 165 struct txcom_chip txcom_chip; 166 167 CFATTACH_DECL_NEW(txcom, sizeof(struct txcom_softc), 168 txcom_match, txcom_attach, NULL, NULL); 169 170 dev_type_open(txcomopen); 171 dev_type_close(txcomclose); 172 dev_type_read(txcomread); 173 dev_type_write(txcomwrite); 174 dev_type_ioctl(txcomioctl); 175 dev_type_stop(txcomstop); 176 dev_type_tty(txcomtty); 177 dev_type_poll(txcompoll); 178 179 const struct cdevsw txcom_cdevsw = { 180 .d_open = txcomopen, 181 .d_close = txcomclose, 182 .d_read = txcomread, 183 .d_write = txcomwrite, 184 .d_ioctl = txcomioctl, 185 .d_stop = txcomstop, 186 .d_tty = txcomtty, 187 .d_poll = txcompoll, 188 .d_mmap = nommap, 189 .d_kqfilter = ttykqfilter, 190 .d_discard = nodiscard, 191 .d_flag = D_TTY 192 }; 193 194 int 195 txcom_match(device_t parent, cfdata_t cf, void *aux) 196 { 197 /* if the autoconfiguration got this far, there's a slot here */ 198 return 1; 199 } 200 201 void 202 txcom_attach(device_t parent, device_t self, void *aux) 203 { 204 struct tx39uart_attach_args *ua = aux; 205 struct txcom_softc *sc = device_private(self); 206 tx_chipset_tag_t tc; 207 struct tty *tp; 208 struct txcom_chip *chip; 209 int slot, console; 210 211 /* Check this slot used as serial console */ 212 console = (ua->ua_slot == txcom_chip.sc_slot) && 213 (txcom_chip.sc_hwflags & TXCOM_HW_CONSOLE); 214 215 if (console) { 216 sc->sc_chip = &txcom_chip; 217 } else { 218 sc->sc_chip = kmem_zalloc(sizeof(struct txcom_chip), 219 KM_SLEEP); 220 } 221 222 chip = sc->sc_chip; 223 tc = chip->sc_tc = ua->ua_tc; 224 slot = chip->sc_slot = ua->ua_slot; 225 226 #ifdef TX39UARTDEBUG 227 txcom_dump(chip); 228 #endif 229 if (!console) 230 txcom_reset(chip); 231 232 sc->sc_rbuf = kmem_zalloc(TXCOM_RING_SIZE, KM_SLEEP); 233 234 tp = tty_alloc(); 235 tp->t_oproc = txcomstart; 236 tp->t_param = txcomparam; 237 tp->t_hwiflow = NULL; 238 sc->sc_tty = tp; 239 tty_attach(tp); 240 241 if (ISSET(chip->sc_hwflags, TXCOM_HW_CONSOLE)) { 242 int maj; 243 /* locate the major number */ 244 maj = cdevsw_lookup_major(&txcom_cdevsw); 245 246 cn_tab->cn_dev = makedev(maj, device_unit(self)); 247 248 printf(": console"); 249 } 250 251 printf("\n"); 252 253 /* 254 * Enable interrupt 255 */ 256 #define TXCOMINTR(i, s) MAKEINTR(2, TX39_INTRSTATUS2_UART##i##INT(s)) 257 258 tx_intr_establish(tc, TXCOMINTR(RX, slot), IST_EDGE, IPL_TTY, 259 txcom_rxintr, sc); 260 tx_intr_establish(tc, TXCOMINTR(TX, slot), IST_EDGE, IPL_TTY, 261 txcom_txintr, sc); 262 tx_intr_establish(tc, TXCOMINTR(RXOVERRUN, slot), IST_EDGE, IPL_TTY, 263 txcom_rxintr, sc); 264 tx_intr_establish(tc, TXCOMINTR(TXOVERRUN, slot), IST_EDGE, IPL_TTY, 265 txcom_txintr, sc); 266 tx_intr_establish(tc, TXCOMINTR(FRAMEERR, slot), IST_EDGE, IPL_TTY, 267 txcom_frameerr_intr, sc); 268 tx_intr_establish(tc, TXCOMINTR(PARITYERR, slot), IST_EDGE, IPL_TTY, 269 txcom_parityerr_intr, sc); 270 tx_intr_establish(tc, TXCOMINTR(BREAK, slot), IST_EDGE, IPL_TTY, 271 txcom_break_intr, sc); 272 273 sc->sc_txsoft_cookie = 274 softint_establish(SOFTINT_SERIAL, txcom_txsoft, sc); 275 sc->sc_rxsoft_cookie = 276 softint_establish(SOFTINT_SERIAL, txcom_rxsoft, sc); 277 278 /* 279 * UARTA has external signal line. (its wiring is platform dependent) 280 */ 281 if (IS_COM0(slot)) { 282 /* install DCD, CTS hooks. */ 283 config_hook(CONFIG_HOOK_EVENT, CONFIG_HOOK_COM0_DCD, 284 CONFIG_HOOK_EXCLUSIVE, txcom_dcd_hook, sc); 285 config_hook(CONFIG_HOOK_EVENT, CONFIG_HOOK_COM0_CTS, 286 CONFIG_HOOK_EXCLUSIVE, txcom_cts_hook, sc); 287 } 288 289 /* 290 * UARTB can connect IR module 291 */ 292 if (IS_COM1(slot)) { 293 struct txcom_attach_args tca; 294 tca.tca_tc = tc; 295 tca.tca_parent = self; 296 config_found(self, &tca, txcom_print, CFARGS_NONE); 297 } 298 } 299 300 int 301 txcom_print(void *aux, const char *pnp) 302 { 303 return pnp ? QUIET : UNCONF; 304 } 305 306 void 307 txcom_reset(struct txcom_chip *chip) 308 { 309 tx_chipset_tag_t tc; 310 int slot, ofs; 311 txreg_t reg; 312 313 tc = chip->sc_tc; 314 slot = chip->sc_slot; 315 ofs = TX39_UARTCTRL1_REG(slot); 316 317 /* Supply clock */ 318 reg = tx_conf_read(tc, TX39_CLOCKCTRL_REG); 319 reg |= (slot ? TX39_CLOCK_ENUARTBCLK : TX39_CLOCK_ENUARTACLK); 320 tx_conf_write(tc, TX39_CLOCKCTRL_REG, reg); 321 322 /* reset UART module */ 323 tx_conf_write(tc, ofs, 0); 324 } 325 326 int 327 txcom_enable(struct txcom_chip *chip, bool console) 328 { 329 tx_chipset_tag_t tc; 330 txreg_t reg; 331 int slot, ofs, timeout; 332 333 tc = chip->sc_tc; 334 slot = chip->sc_slot; 335 ofs = TX39_UARTCTRL1_REG(slot); 336 337 /* 338 * External power supply (if any) 339 * When serial console, Windows CE already powered on it. 340 */ 341 if (!console) { 342 config_hook_call(CONFIG_HOOK_POWERCONTROL, 343 CONFIG_HOOK_POWERCONTROL_COM0, PWCTL_ON); 344 delay(3); 345 } 346 347 /* Supply clock */ 348 reg = tx_conf_read(tc, TX39_CLOCKCTRL_REG); 349 reg |= (slot ? TX39_CLOCK_ENUARTBCLK : TX39_CLOCK_ENUARTACLK); 350 tx_conf_write(tc, TX39_CLOCKCTRL_REG, reg); 351 352 /* 353 * XXX Disable DMA (DMA not coded yet) 354 */ 355 reg = tx_conf_read(tc, ofs); 356 reg &= ~(TX39_UARTCTRL1_ENDMARX | TX39_UARTCTRL1_ENDMATX); 357 tx_conf_write(tc, ofs, reg); 358 359 /* enable */ 360 reg = tx_conf_read(tc, ofs); 361 reg |= TX39_UARTCTRL1_ENUART; 362 reg &= ~TX39_UARTCTRL1_ENBREAHALT; 363 tx_conf_write(tc, ofs, reg); 364 365 timeout = 100000; 366 367 while(!(tx_conf_read(tc, ofs) & TX39_UARTCTRL1_UARTON) && 368 --timeout > 0) 369 ; 370 371 if (timeout == 0 && !cold) { 372 printf("%s never power up\n", __txcom_slotname(slot)); 373 return 1; 374 } 375 376 return 0; 377 } 378 379 void 380 txcom_disable(struct txcom_chip *chip) 381 { 382 tx_chipset_tag_t tc; 383 txreg_t reg; 384 int slot; 385 386 tc = chip->sc_tc; 387 slot = chip->sc_slot; 388 389 reg = tx_conf_read(tc, TX39_UARTCTRL1_REG(slot)); 390 /* DMA */ 391 reg &= ~(TX39_UARTCTRL1_ENDMARX | TX39_UARTCTRL1_ENDMATX); 392 393 /* disable module */ 394 reg &= ~TX39_UARTCTRL1_ENUART; 395 tx_conf_write(tc, TX39_UARTCTRL1_REG(slot), reg); 396 397 /* Clock */ 398 reg = tx_conf_read(tc, TX39_CLOCKCTRL_REG); 399 reg &= ~(slot ? TX39_CLOCK_ENUARTBCLK : TX39_CLOCK_ENUARTACLK); 400 tx_conf_write(tc, TX39_CLOCKCTRL_REG, reg); 401 402 } 403 404 inline int 405 __txcom_txbufready(struct txcom_chip *chip, int retry) 406 { 407 tx_chipset_tag_t tc = chip->sc_tc; 408 int ofs = TX39_UARTCTRL1_REG(chip->sc_slot); 409 410 do { 411 if (tx_conf_read(tc, ofs) & TX39_UARTCTRL1_EMPTY) 412 return 1; 413 } while(--retry != 0); 414 415 return 0; 416 } 417 418 void 419 txcom_pulse_mode(device_t dev) 420 { 421 struct txcom_softc *sc = device_private(dev); 422 struct txcom_chip *chip = sc->sc_chip; 423 tx_chipset_tag_t tc = chip->sc_tc; 424 int ofs; 425 txreg_t reg; 426 427 ofs = TX39_UARTCTRL1_REG(chip->sc_slot); 428 429 reg = tx_conf_read(tc, ofs); 430 /* WindowsCE use this setting */ 431 reg |= TX39_UARTCTRL1_PULSEOPT1; 432 reg &= ~TX39_UARTCTRL1_PULSEOPT2; 433 reg |= TX39_UARTCTRL1_DTINVERT; 434 435 tx_conf_write(tc, ofs, reg); 436 } 437 438 /* 439 * console 440 */ 441 int 442 txcom_cngetc(dev_t dev) 443 { 444 tx_chipset_tag_t tc; 445 int ofs, c, s; 446 447 s = spltty(); 448 449 tc = txcom_chip.sc_tc; 450 ofs = TX39_UARTCTRL1_REG(txcom_chip.sc_slot); 451 452 while(!(TX39_UARTCTRL1_RXHOLDFULL & tx_conf_read(tc, ofs))) 453 ; 454 455 c = TX39_UARTRXHOLD_RXDATA( 456 tx_conf_read(tc, TX39_UARTRXHOLD_REG(txcom_chip.sc_slot))); 457 458 if (c == '\r') 459 c = '\n'; 460 461 splx(s); 462 463 return c; 464 } 465 466 void 467 txcom_cnputc(dev_t dev, int c) 468 { 469 struct txcom_chip *chip = &txcom_chip; 470 tx_chipset_tag_t tc = chip->sc_tc; 471 int s; 472 473 s = spltty(); 474 475 /* Wait for transmitter to empty */ 476 __txcom_txbufready(chip, -1); 477 478 tx_conf_write(tc, TX39_UARTTXHOLD_REG(chip->sc_slot), 479 (c & TX39_UARTTXHOLD_TXDATA_MASK)); 480 481 __txcom_txbufready(chip, -1); 482 483 splx(s); 484 } 485 486 void 487 txcom_cnpollc(dev_t dev, int on) 488 { 489 } 490 491 void 492 txcom_setmode(struct txcom_chip *chip) 493 { 494 tcflag_t cflag = chip->sc_cflag; 495 int ofs = TX39_UARTCTRL1_REG(chip->sc_slot); 496 txreg_t reg; 497 498 reg = tx_conf_read(chip->sc_tc, ofs); 499 reg &= ~TX39_UARTCTRL1_ENUART; 500 tx_conf_write(chip->sc_tc, ofs, reg); 501 502 switch (ISSET(cflag, CSIZE)) { 503 default: 504 printf("txcom_setmode: CS7, CS8 only. use CS7"); 505 /* FALL THROUGH */ 506 case CS7: 507 reg |= TX39_UARTCTRL1_BIT7; 508 break; 509 case CS8: 510 reg &= ~TX39_UARTCTRL1_BIT7; 511 break; 512 } 513 514 if (ISSET(cflag, PARENB)) { 515 reg |= TX39_UARTCTRL1_ENPARITY; 516 if (ISSET(cflag, PARODD)) { 517 reg &= ~TX39_UARTCTRL1_EVENPARITY; 518 } else { 519 reg |= TX39_UARTCTRL1_EVENPARITY; 520 } 521 } else { 522 reg &= ~TX39_UARTCTRL1_ENPARITY; 523 } 524 525 if (ISSET(cflag, CSTOPB)) 526 reg |= TX39_UARTCTRL1_TWOSTOP; 527 else 528 reg &= ~TX39_UARTCTRL1_TWOSTOP; 529 530 reg |= TX39_UARTCTRL1_ENUART; 531 tx_conf_write(chip->sc_tc, ofs, reg); 532 } 533 534 void 535 txcom_setbaudrate(struct txcom_chip *chip) 536 { 537 int baudrate; 538 int ofs = TX39_UARTCTRL1_REG(chip->sc_slot); 539 txreg_t reg, reg1; 540 541 if (chip->sc_speed == 0) 542 return; 543 544 if (!cold) 545 DPRINTF("%d\n", chip->sc_speed); 546 547 reg1 = tx_conf_read(chip->sc_tc, ofs); 548 reg1 &= ~TX39_UARTCTRL1_ENUART; 549 tx_conf_write(chip->sc_tc, ofs, reg1); 550 551 baudrate = TX39_UARTCLOCKHZ / (chip->sc_speed * 16) - 1; 552 reg = TX39_UARTCTRL2_BAUDRATE_SET(0, baudrate); 553 554 tx_conf_write(chip->sc_tc, TX39_UARTCTRL2_REG(chip->sc_slot), reg); 555 556 reg1 |= TX39_UARTCTRL1_ENUART; 557 tx_conf_write(chip->sc_tc, ofs, reg1); 558 } 559 560 int 561 txcom_cnattach(int slot, int speed, int cflag) 562 { 563 cn_tab = &txcomcons; 564 565 txcom_chip.sc_tc = tx_conf_get_tag(); 566 txcom_chip.sc_slot = slot; 567 txcom_chip.sc_cflag = cflag; 568 txcom_chip.sc_speed = speed; 569 txcom_chip.sc_hwflags |= TXCOM_HW_CONSOLE; 570 #if notyet 571 txcom_reset(&txcom_chip); 572 #endif 573 txcom_setmode(&txcom_chip); 574 txcom_setbaudrate(&txcom_chip); 575 576 if (txcom_enable(&txcom_chip, true) != 0) 577 return 1; 578 579 return 0; 580 } 581 582 /* 583 * tty 584 */ 585 void 586 txcom_break(struct txcom_softc *sc, int on) 587 { 588 struct txcom_chip *chip = sc->sc_chip; 589 590 tx_conf_write(chip->sc_tc, TX39_UARTTXHOLD_REG(chip->sc_slot), 591 on ? TX39_UARTTXHOLD_BREAK : 0); 592 } 593 594 void 595 txcom_modem(struct txcom_softc *sc, int on) 596 { 597 struct txcom_chip *chip = sc->sc_chip; 598 tx_chipset_tag_t tc = chip->sc_tc; 599 int slot = chip->sc_slot; 600 txreg_t reg; 601 602 /* assert DTR */ 603 if (IS_COM0(slot)) { 604 config_hook_call(CONFIG_HOOK_SET, 605 CONFIG_HOOK_COM0_DTR, 606 (void *)on); 607 } 608 609 reg = tx_conf_read(tc, TX39_UARTCTRL1_REG(slot)); 610 reg &= ~TX39_UARTCTRL1_ENUART; 611 tx_conf_write(tc, TX39_UARTCTRL1_REG(slot), reg); 612 613 if (on) { 614 reg &= ~TX39_UARTCTRL1_DISTXD; 615 } else { 616 reg |= TX39_UARTCTRL1_DISTXD; /* low UARTTXD */ 617 } 618 619 reg |= TX39_UARTCTRL1_ENUART; 620 tx_conf_write(tc, TX39_UARTCTRL1_REG(slot), reg); 621 } 622 623 void 624 txcom_shutdown(struct txcom_softc *sc) 625 { 626 struct tty *tp = sc->sc_tty; 627 int s = spltty(); 628 629 /* Clear any break condition set with TIOCSBRK. */ 630 txcom_break(sc, 0); 631 632 /* 633 * Hang up if necessary. Wait a bit, so the other side has time to 634 * notice even if we immediately open the port again. 635 */ 636 if (ISSET(tp->t_cflag, HUPCL)) { 637 txcom_modem(sc, 0); 638 (void) tsleep(sc, TTIPRI, ttclos, hz); 639 } 640 641 642 /* Turn off interrupts if not the console. */ 643 if (!ISSET(sc->sc_chip->sc_hwflags, TXCOM_HW_CONSOLE)) { 644 txcom_disable(sc->sc_chip); 645 } 646 647 splx(s); 648 } 649 650 const char * 651 __txcom_slotname(int slot) 652 { 653 static const char *slotname[] = {"UARTA", "UARTB", "unknown"}; 654 655 if (slot != 0 && slot != 1) 656 return slotname[2]; 657 658 return slotname[slot]; 659 } 660 661 int 662 txcom_frameerr_intr(void *arg) 663 { 664 struct txcom_softc *sc = arg; 665 666 printf("%s frame error\n", __txcom_slotname(sc->sc_chip->sc_slot)); 667 668 return 0; 669 } 670 671 int 672 txcom_parityerr_intr(void *arg) 673 { 674 struct txcom_softc *sc = arg; 675 676 printf("%s parity error\n", __txcom_slotname(sc->sc_chip->sc_slot)); 677 678 return 0; 679 } 680 681 int 682 txcom_break_intr(void *arg) 683 { 684 struct txcom_softc *sc = arg; 685 686 printf("%s break\n", __txcom_slotname(sc->sc_chip->sc_slot)); 687 688 return 0; 689 } 690 691 int 692 txcom_rxintr(void *arg) 693 { 694 struct txcom_softc *sc = arg; 695 struct txcom_chip *chip = sc->sc_chip; 696 u_int8_t c; 697 698 c = TX39_UARTRXHOLD_RXDATA( 699 tx_conf_read(chip->sc_tc, 700 TX39_UARTRXHOLD_REG(chip->sc_slot))); 701 702 sc->sc_rbuf[sc->sc_rbput] = c; 703 sc->sc_rbput = (sc->sc_rbput + 1) % TXCOM_RING_MASK; 704 705 softint_schedule(sc->sc_rxsoft_cookie); 706 707 return 0; 708 } 709 710 void 711 txcom_rxsoft(void *arg) 712 { 713 struct txcom_softc *sc = arg; 714 struct tty *tp = sc->sc_tty; 715 int (*rint)(int, struct tty *); 716 int code; 717 int s, end, get; 718 719 rint = tp->t_linesw->l_rint; 720 721 s = spltty(); 722 end = sc->sc_rbput; 723 get = sc->sc_rbget; 724 725 while (get != end) { 726 code = sc->sc_rbuf[get]; 727 728 if ((*rint)(code, tp) == -1) { 729 /* 730 * The line discipline's buffer is out of space. 731 */ 732 } 733 get = (get + 1) % TXCOM_RING_MASK; 734 } 735 sc->sc_rbget = get; 736 737 splx(s); 738 } 739 740 int 741 txcom_txintr(void *arg) 742 { 743 struct txcom_softc *sc = arg; 744 struct txcom_chip *chip = sc->sc_chip; 745 tx_chipset_tag_t tc = chip->sc_tc; 746 747 if (sc->sc_tbc > 0) { 748 tx_conf_write(tc, TX39_UARTTXHOLD_REG(chip->sc_slot), 749 (*sc->sc_tba & 750 TX39_UARTTXHOLD_TXDATA_MASK)); 751 sc->sc_tbc--; 752 sc->sc_tba++; 753 } else { 754 softint_schedule(sc->sc_txsoft_cookie); 755 } 756 757 return 0; 758 } 759 760 void 761 txcom_txsoft(void *arg) 762 { 763 struct txcom_softc *sc = arg; 764 struct tty *tp = sc->sc_tty; 765 int s = spltty(); 766 767 CLR(tp->t_state, TS_BUSY); 768 if (ISSET(tp->t_state, TS_FLUSH)) { 769 CLR(tp->t_state, TS_FLUSH); 770 } else { 771 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 772 } 773 774 (*tp->t_linesw->l_start)(tp); 775 776 splx(s); 777 } 778 779 int 780 txcomopen(dev_t dev, int flag, int mode, struct lwp *l) 781 { 782 struct txcom_softc *sc; 783 struct txcom_chip *chip; 784 struct tty *tp; 785 int s, err = ENXIO; 786 787 sc = device_lookup_private(&txcom_cd, minor(dev)); 788 if (sc == NULL) 789 return err; 790 791 chip = sc->sc_chip; 792 tp = sc->sc_tty; 793 794 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 795 return (EBUSY); 796 797 s = spltty(); 798 799 if (txcom_enable(sc->sc_chip, false)) { 800 splx(s); 801 goto out; 802 } 803 /* 804 * Do the following iff this is a first open. 805 */ 806 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 807 struct termios t; 808 809 tp->t_dev = dev; 810 811 t.c_ispeed = 0; 812 if (ISSET(chip->sc_hwflags, TXCOM_HW_CONSOLE)) { 813 t.c_ospeed = chip->sc_speed; 814 t.c_cflag = chip->sc_cflag; 815 } else { 816 t.c_ospeed = TTYDEF_SPEED; 817 t.c_cflag = TTYDEF_CFLAG; 818 } 819 820 if (ISSET(chip->sc_swflags, TIOCFLAG_CLOCAL)) 821 SET(t.c_cflag, CLOCAL); 822 if (ISSET(chip->sc_swflags, TIOCFLAG_CRTSCTS)) 823 SET(t.c_cflag, CRTSCTS); 824 if (ISSET(chip->sc_swflags, TIOCFLAG_MDMBUF)) 825 SET(t.c_cflag, MDMBUF); 826 827 /* Make sure txcomparam() will do something. */ 828 tp->t_ospeed = 0; 829 txcomparam(tp, &t); 830 831 tp->t_iflag = TTYDEF_IFLAG; 832 tp->t_oflag = TTYDEF_OFLAG; 833 tp->t_lflag = TTYDEF_LFLAG; 834 835 ttychars(tp); 836 ttsetwater(tp); 837 838 /* 839 * Turn on DTR. We must always do this, even if carrier is not 840 * present, because otherwise we'd have to use TIOCSDTR 841 * immediately after setting CLOCAL, which applications do not 842 * expect. We always assert DTR while the device is open 843 * unless explicitly requested to deassert it. 844 */ 845 txcom_modem(sc, 1); 846 847 /* Clear the input ring, and unblock. */ 848 sc->sc_rbget = sc->sc_rbput = 0; 849 } 850 851 splx(s); 852 #define TXCOMDIALOUT(x) TTDIALOUT(x) 853 if ((err = ttyopen(tp, TXCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)))) { 854 DPRINTF("ttyopen failed\n"); 855 goto out; 856 } 857 if ((err = (*tp->t_linesw->l_open)(dev, tp))) { 858 DPRINTF("line discipline open failed\n"); 859 goto out; 860 } 861 862 return err; 863 864 out: 865 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 866 /* 867 * We failed to open the device, and nobody else had it opened. 868 * Clean up the state as appropriate. 869 */ 870 txcom_shutdown(sc); 871 } 872 873 return err; 874 875 } 876 877 int 878 txcomclose(dev_t dev, int flag, int mode, struct lwp *l) 879 { 880 struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev)); 881 struct tty *tp = sc->sc_tty; 882 883 /* XXX This is for cons.c. */ 884 if (!ISSET(tp->t_state, TS_ISOPEN)) 885 return 0; 886 887 (*tp->t_linesw->l_close)(tp, flag); 888 ttyclose(tp); 889 890 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 891 /* 892 * Although we got a last close, the device may still be in 893 * use; e.g. if this was the dialout node, and there are still 894 * processes waiting for carrier on the non-dialout node. 895 */ 896 txcom_shutdown(sc); 897 } 898 899 return 0; 900 } 901 902 int 903 txcomread(dev_t dev, struct uio *uio, int flag) 904 { 905 struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev)); 906 struct tty *tp = sc->sc_tty; 907 908 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 909 } 910 911 int 912 txcomwrite(dev_t dev, struct uio *uio, int flag) 913 { 914 struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev)); 915 struct tty *tp = sc->sc_tty; 916 917 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 918 } 919 920 int 921 txcompoll(dev_t dev, int events, struct lwp *l) 922 { 923 struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev)); 924 struct tty *tp = sc->sc_tty; 925 926 return ((*tp->t_linesw->l_poll)(tp, events, l)); 927 } 928 929 struct tty * 930 txcomtty(dev_t dev) 931 { 932 struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev)); 933 934 return sc->sc_tty; 935 } 936 937 int 938 txcomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 939 { 940 struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev)); 941 struct tty *tp = sc->sc_tty; 942 int s, err; 943 944 err = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 945 if (err != EPASSTHROUGH) { 946 return err; 947 } 948 949 err = ttioctl(tp, cmd, data, flag, l); 950 if (err != EPASSTHROUGH) { 951 return err; 952 } 953 954 err = 0; 955 956 s = spltty(); 957 958 switch (cmd) { 959 default: 960 err = EPASSTHROUGH; 961 break; 962 963 case TIOCSBRK: 964 txcom_break(sc, 1); 965 break; 966 967 case TIOCCBRK: 968 txcom_break(sc, 0); 969 break; 970 971 case TIOCSDTR: 972 txcom_modem(sc, 1); 973 break; 974 975 case TIOCCDTR: 976 txcom_modem(sc, 0); 977 break; 978 979 case TIOCGFLAGS: 980 *(int *)data = sc->sc_chip->sc_swflags; 981 break; 982 983 case TIOCSFLAGS: 984 err = kauth_authorize_device_tty(l->l_cred, 985 KAUTH_DEVICE_TTY_PRIVSET, tp); 986 if (err) { 987 break; 988 } 989 sc->sc_chip->sc_swflags = *(int *)data; 990 break; 991 992 } 993 994 splx(s); 995 996 return err; 997 } 998 999 void 1000 txcomstop(struct tty *tp, int flag) 1001 { 1002 struct txcom_softc *sc; 1003 int s; 1004 1005 sc = device_lookup_private(&txcom_cd, minor(tp->t_dev)); 1006 1007 s = spltty(); 1008 1009 if (ISSET(tp->t_state, TS_BUSY)) { 1010 /* Stop transmitting at the next chunk. */ 1011 sc->sc_tbc = 0; 1012 sc->sc_heldtbc = 0; 1013 if (!ISSET(tp->t_state, TS_TTSTOP)) 1014 SET(tp->t_state, TS_FLUSH); 1015 } 1016 1017 splx(s); 1018 } 1019 1020 void 1021 txcomstart(struct tty *tp) 1022 { 1023 struct txcom_softc *sc; 1024 struct txcom_chip *chip; 1025 tx_chipset_tag_t tc; 1026 int slot; 1027 int s; 1028 1029 sc = device_lookup_private(&txcom_cd, minor(tp->t_dev)); 1030 chip = sc->sc_chip; 1031 tc = chip->sc_tc; 1032 slot = chip->sc_slot; 1033 1034 s = spltty(); 1035 1036 if (!__txcom_txbufready(chip, 0) || 1037 ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1038 goto out; 1039 1040 if (!ttypull(tp)) 1041 goto out; 1042 1043 sc->sc_tba = tp->t_outq.c_cf; 1044 sc->sc_tbc = ndqb(&tp->t_outq, 0); 1045 SET(tp->t_state, TS_BUSY); 1046 1047 /* Output the first character of the contiguous buffer. */ 1048 tx_conf_write(tc, TX39_UARTTXHOLD_REG(slot), 1049 (*sc->sc_tba & TX39_UARTTXHOLD_TXDATA_MASK)); 1050 1051 sc->sc_tbc--; 1052 sc->sc_tba++; 1053 1054 out: 1055 splx(s); 1056 } 1057 1058 /* 1059 * Set TXcom tty parameters from termios. 1060 */ 1061 int 1062 txcomparam(struct tty *tp, struct termios *t) 1063 { 1064 struct txcom_softc *sc; 1065 struct txcom_chip *chip; 1066 int ospeed; 1067 int s; 1068 1069 sc = device_lookup_private(&txcom_cd, minor(tp->t_dev)); 1070 if (sc == NULL) 1071 return ENXIO; 1072 1073 ospeed = t->c_ospeed; 1074 1075 /* Check requested parameters. */ 1076 if (ospeed < 0) { 1077 return EINVAL; 1078 } 1079 if (t->c_ispeed && t->c_ispeed != ospeed) { 1080 return EINVAL; 1081 } 1082 1083 s = spltty(); 1084 chip = sc->sc_chip; 1085 /* 1086 * For the console, always force CLOCAL and !HUPCL, so that the port 1087 * is always active. 1088 */ 1089 if (ISSET(chip->sc_swflags, TIOCFLAG_SOFTCAR) || 1090 ISSET(chip->sc_hwflags, TXCOM_HW_CONSOLE)) { 1091 SET(t->c_cflag, CLOCAL); 1092 CLR(t->c_cflag, HUPCL); 1093 } 1094 splx(s); 1095 1096 /* 1097 * If we're not in a mode that assumes a connection is present, then 1098 * ignore carrier changes. 1099 */ 1100 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 1101 chip->sc_dcd = 0; 1102 else 1103 chip->sc_dcd = 1; 1104 1105 /* 1106 * Only whack the UART when params change. 1107 * Some callers need to clear tp->t_ospeed 1108 * to make sure initialization gets done. 1109 */ 1110 if (tp->t_ospeed == ospeed && tp->t_cflag == t->c_cflag) { 1111 return 0; 1112 } 1113 1114 s = spltty(); 1115 chip = sc->sc_chip; 1116 chip->sc_speed = ospeed; 1117 chip->sc_cflag = t->c_cflag; 1118 1119 txcom_setmode(chip); 1120 txcom_setbaudrate(chip); 1121 1122 /* And copy to tty. */ 1123 tp->t_ispeed = 0; 1124 tp->t_ospeed = chip->sc_speed; 1125 tp->t_cflag = chip->sc_cflag; 1126 1127 /* 1128 * Update the tty layer's idea of the carrier bit, in case we changed 1129 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1130 * explicit request. 1131 */ 1132 (void) (*tp->t_linesw->l_modem)(tp, chip->sc_dcd); 1133 1134 /* 1135 * If hardware flow control is disabled, unblock any hard flow 1136 * control state. 1137 */ 1138 if (!ISSET(chip->sc_cflag, CHWFLOW)) { 1139 txcomstart(tp); 1140 } 1141 1142 splx(s); 1143 1144 return 0; 1145 } 1146 1147 int 1148 txcom_dcd_hook(void *arg, int type, long id, void *msg) 1149 { 1150 struct txcom_softc *sc = arg; 1151 struct tty *tp = sc->sc_tty; 1152 struct txcom_chip *chip = sc->sc_chip; 1153 int modem = !(int)msg; /* p-edge 1, n-edge 0 */ 1154 1155 DPRINTF("DCD %s\n", modem ? "ON" : "OFF"); 1156 1157 if (modem && chip->sc_dcd) 1158 (void) (*tp->t_linesw->l_modem)(tp, chip->sc_dcd); 1159 1160 return 0; 1161 } 1162 1163 int 1164 txcom_cts_hook(void *arg, int type, long id, void *msg) 1165 { 1166 struct txcom_softc *sc = arg; 1167 struct tty *tp = sc->sc_tty; 1168 struct txcom_chip *chip = sc->sc_chip; 1169 int clear = !(int)msg; /* p-edge 1, n-edge 0 */ 1170 1171 DPRINTF("CTS %s\n", clear ? "ON" : "OFF"); 1172 1173 if (chip->sc_msr_cts) { 1174 if (!clear) { 1175 chip->sc_tx_stopped = 1; 1176 } else { 1177 chip->sc_tx_stopped = 0; 1178 (*tp->t_linesw->l_start)(tp); 1179 } 1180 } 1181 1182 return 0; 1183 } 1184 1185 #ifdef TX39UARTDEBUG 1186 void 1187 txcom_dump(struct txcom_chip *chip) 1188 { 1189 tx_chipset_tag_t tc = chip->sc_tc; 1190 int slot = chip->sc_slot; 1191 txreg_t reg; 1192 1193 reg = tx_conf_read(tc, TX39_UARTCTRL1_REG(slot)); 1194 #define ISSETPRINT(r, m) \ 1195 dbg_bitmask_print(r, TX39_UARTCTRL1_##m, #m) 1196 ISSETPRINT(reg, UARTON); 1197 ISSETPRINT(reg, EMPTY); 1198 ISSETPRINT(reg, PRXHOLDFULL); 1199 ISSETPRINT(reg, RXHOLDFULL); 1200 ISSETPRINT(reg, ENDMARX); 1201 ISSETPRINT(reg, ENDMATX); 1202 ISSETPRINT(reg, TESTMODE); 1203 ISSETPRINT(reg, ENBREAHALT); 1204 ISSETPRINT(reg, ENDMATEST); 1205 ISSETPRINT(reg, ENDMALOOP); 1206 ISSETPRINT(reg, PULSEOPT2); 1207 ISSETPRINT(reg, PULSEOPT1); 1208 ISSETPRINT(reg, DTINVERT); 1209 ISSETPRINT(reg, DISTXD); 1210 ISSETPRINT(reg, TWOSTOP); 1211 ISSETPRINT(reg, LOOPBACK); 1212 ISSETPRINT(reg, BIT7); 1213 ISSETPRINT(reg, EVENPARITY); 1214 ISSETPRINT(reg, ENPARITY); 1215 ISSETPRINT(reg, ENUART); 1216 } 1217 #endif /* TX39UARTDEBUG */ 1218
Indexes created Thu Oct 30 16:09:53 GMT 2025