sys/arch/hpcmips/tx/txcom.c

   1 /*      $NetBSD: txcom.c,v 1.40 2008/06/12 16:50:53 tsutsui 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 1.40 2008/06/12 16:50:53 tsutsui 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/malloc.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  device          sc_dev;
  99         struct tty              *sc_tty;
 100         struct txcom_chip       *sc_chip;
 101
 102         struct callout          sc_txsoft_ch;
 103         struct callout          sc_rxsoft_ch;
 104
 105         u_int8_t        *sc_tba;        /* transmit buffer address */
 106         int             sc_tbc;         /* transmit byte count */
 107         int             sc_heldtbc;
 108         u_int8_t        *sc_rbuf;       /* receive buffer address */
 109         int             sc_rbput;       /* receive byte count */
 110         int             sc_rbget;
 111 };
 112
 113 extern struct cfdriver txcom_cd;
 114
 115 int     txcom_match(struct device *, struct cfdata *, void *);
 116 void    txcom_attach(struct device *, struct device *, void *);
 117 int     txcom_print(void*, const char *);
 118
 119 int     txcom_txintr(void *);
 120 int     txcom_rxintr(void *);
 121 int     txcom_frameerr_intr(void *);
 122 int     txcom_parityerr_intr(void *);
 123 int     txcom_break_intr(void *);
 124
 125 void    txcom_rxsoft(void *);
 126 void    txcom_txsoft(void *);
 127
 128 int     txcom_stsoft(void *);
 129 int     txcom_stsoft2(void *);
 130 int     txcom_stsoft3(void *);
 131 int     txcom_stsoft4(void *);
 132
 133
 134 void    txcom_shutdown(struct txcom_softc *);
 135 void    txcom_break(struct txcom_softc *, int);
 136 void    txcom_modem(struct txcom_softc *, int);
 137 void    txcomstart(struct tty *);
 138 int     txcomparam(struct tty *, struct termios *);
 139
 140 void    txcom_reset     (struct txcom_chip *);
 141 int     txcom_enable    (struct txcom_chip *, bool);
 142 void    txcom_disable   (struct txcom_chip *);
 143 void    txcom_setmode   (struct txcom_chip *);
 144 void    txcom_setbaudrate(struct txcom_chip *);
 145 int     txcom_cngetc    (dev_t);
 146 void    txcom_cnputc    (dev_t, int);
 147 void    txcom_cnpollc   (dev_t, int);
 148
 149 int     txcom_dcd_hook(void *, int, long, void *);
 150 int     txcom_cts_hook(void *, int, long, void *);
 151
 152
 153 inline int      __txcom_txbufready(struct txcom_chip *, int);
 154 const char *__txcom_slotname(int);
 155
 156 #ifdef TX39UARTDEBUG
 157 void    txcom_dump(struct txcom_chip *);
 158 #endif
 159
 160 struct consdev txcomcons = {
 161         NULL, NULL, txcom_cngetc, txcom_cnputc, txcom_cnpollc, NULL, NULL,
 162         NULL, NODEV, CN_NORMAL
 163 };
 164
 165 /* Serial console */
 166 struct txcom_chip txcom_chip;
 167
 168 CFATTACH_DECL(txcom, sizeof(struct txcom_softc),
 169     txcom_match, txcom_attach, NULL, NULL);
 170
 171 dev_type_open(txcomopen);
 172 dev_type_close(txcomclose);
 173 dev_type_read(txcomread);
 174 dev_type_write(txcomwrite);
 175 dev_type_ioctl(txcomioctl);
 176 dev_type_stop(txcomstop);
 177 dev_type_tty(txcomtty);
 178 dev_type_poll(txcompoll);
 179
 180 const struct cdevsw txcom_cdevsw = {
 181         txcomopen, txcomclose, txcomread, txcomwrite, txcomioctl,
 182         txcomstop, txcomtty, txcompoll, nommap, ttykqfilter, D_TTY
 183 };
 184
 185 int
 186 txcom_match(struct device *parent, struct cfdata *cf, void *aux)
 187 {
 188         /* if the autoconfiguration got this far, there's a slot here */
 189         return 1;
 190 }
 191
 192 void
 193 txcom_attach(struct device *parent, struct device *self, void *aux)
 194 {
 195         struct tx39uart_attach_args *ua = aux;
 196         struct txcom_softc *sc = (void*)self;
 197         tx_chipset_tag_t tc;
 198         struct tty *tp;
 199         struct txcom_chip *chip;
 200         int slot, console;
 201
 202         /* Check this slot used as serial console */
 203         console = (ua->ua_slot == txcom_chip.sc_slot) &&
 204             (txcom_chip.sc_hwflags & TXCOM_HW_CONSOLE);
 205
 206         if (console) {
 207                 sc->sc_chip = &txcom_chip;
 208         } else {
 209                 if (!(sc->sc_chip = malloc(sizeof(struct txcom_chip),
 210                     M_DEVBUF, M_WAITOK))) {
 211                         printf(": can't allocate chip\n");
 212                         return;
 213                 }
 214                 memset(sc->sc_chip, 0, sizeof(struct txcom_chip));
 215         }
 216
 217         chip = sc->sc_chip;
 218         tc = chip->sc_tc = ua->ua_tc;
 219         slot = chip->sc_slot = ua->ua_slot;
 220
 221 #ifdef TX39UARTDEBUG
 222         txcom_dump(chip);
 223 #endif
 224         if (!console)
 225                 txcom_reset(chip);
 226
 227         if (!(sc->sc_rbuf = malloc(TXCOM_RING_SIZE, M_DEVBUF, M_WAITOK))) {
 228                 printf(": can't allocate buffer.\n");
 229                 return;
 230         }
 231         memset(sc->sc_rbuf, 0, TXCOM_RING_SIZE);
 232
 233         tp = ttymalloc();
 234         tp->t_oproc = txcomstart;
 235         tp->t_param = txcomparam;
 236         tp->t_hwiflow = NULL;
 237         sc->sc_tty = tp;
 238         tty_attach(tp);
 239
 240         if (ISSET(chip->sc_hwflags, TXCOM_HW_CONSOLE)) {
 241                 int maj;
 242                 /* locate the major number */
 243                 maj = cdevsw_lookup_major(&txcom_cdevsw);
 244
 245                 cn_tab->cn_dev = makedev(maj, device_unit(&sc->sc_dev));
 246
 247                 printf(": console");
 248         }
 249
 250         printf("\n");
 251
 252         /*
 253          * Enable interrupt
 254          */
 255 #define TXCOMINTR(i, s) MAKEINTR(2, TX39_INTRSTATUS2_UART##i##INT(s))
 256
 257         tx_intr_establish(tc, TXCOMINTR(RX, slot), IST_EDGE, IPL_TTY,
 258             txcom_rxintr, sc);
 259         tx_intr_establish(tc, TXCOMINTR(TX, slot), IST_EDGE, IPL_TTY,
 260             txcom_txintr, sc);
 261         tx_intr_establish(tc, TXCOMINTR(RXOVERRUN, slot), IST_EDGE, IPL_TTY,
 262             txcom_rxintr, sc);
 263         tx_intr_establish(tc, TXCOMINTR(TXOVERRUN, slot), IST_EDGE, IPL_TTY,
 264             txcom_txintr, sc);
 265         tx_intr_establish(tc, TXCOMINTR(FRAMEERR, slot), IST_EDGE, IPL_TTY,
 266             txcom_frameerr_intr, sc);
 267         tx_intr_establish(tc, TXCOMINTR(PARITYERR, slot), IST_EDGE, IPL_TTY,
 268             txcom_parityerr_intr, sc);
 269         tx_intr_establish(tc, TXCOMINTR(BREAK, slot), IST_EDGE, IPL_TTY,
 270             txcom_break_intr, sc);
 271
 272         /*
 273          * UARTA has external signal line. (its wiring is platform dependent)
 274          */
 275         if (IS_COM0(slot)) {
 276                 /* install DCD, CTS hooks. */
 277                 config_hook(CONFIG_HOOK_EVENT, CONFIG_HOOK_COM0_DCD,
 278                     CONFIG_HOOK_EXCLUSIVE, txcom_dcd_hook, sc);
 279                 config_hook(CONFIG_HOOK_EVENT, CONFIG_HOOK_COM0_CTS,
 280                     CONFIG_HOOK_EXCLUSIVE, txcom_cts_hook, sc);
 281         }
 282
 283         /*
 284          * UARTB can connect IR module
 285          */
 286         if (IS_COM1(slot)) {
 287                 struct txcom_attach_args tca;
 288                 tca.tca_tc = tc;
 289                 tca.tca_parent = self;
 290                 config_found(self, &tca, txcom_print);
 291         }
 292 }
 293
 294 int
 295 txcom_print(void *aux, const char *pnp)
 296 {
 297         return pnp ? QUIET : UNCONF;
 298 }
 299
 300 void
 301 txcom_reset(struct txcom_chip *chip)
 302 {
 303         tx_chipset_tag_t tc;
 304         int slot, ofs;
 305         txreg_t reg;
 306
 307         tc = chip->sc_tc;
 308         slot = chip->sc_slot;
 309         ofs = TX39_UARTCTRL1_REG(slot);
 310
 311         /* Supply clock */
 312         reg = tx_conf_read(tc, TX39_CLOCKCTRL_REG);
 313         reg |= (slot ? TX39_CLOCK_ENUARTBCLK : TX39_CLOCK_ENUARTACLK);
 314         tx_conf_write(tc, TX39_CLOCKCTRL_REG, reg);
 315
 316         /* reset UART module */
 317         tx_conf_write(tc, ofs, 0);
 318 }
 319
 320 int
 321 txcom_enable(struct txcom_chip *chip, bool console)
 322 {
 323         tx_chipset_tag_t tc;
 324         txreg_t reg;
 325         int slot, ofs, timeout;
 326
 327         tc = chip->sc_tc;
 328         slot = chip->sc_slot;
 329         ofs = TX39_UARTCTRL1_REG(slot);
 330
 331         /*
 332          * External power supply (if any)
 333          * When serial console, Windows CE already powered on it.
 334          */
 335         if (!console) {
 336                 config_hook_call(CONFIG_HOOK_POWERCONTROL,
 337                     CONFIG_HOOK_POWERCONTROL_COM0, PWCTL_ON);
 338                 delay(3);
 339         }
 340
 341         /* Supply clock */
 342         reg = tx_conf_read(tc, TX39_CLOCKCTRL_REG);
 343         reg |= (slot ? TX39_CLOCK_ENUARTBCLK : TX39_CLOCK_ENUARTACLK);
 344         tx_conf_write(tc, TX39_CLOCKCTRL_REG, reg);
 345
 346         /*
 347          * XXX Disable DMA (DMA not coded yet)
 348          */
 349         reg = tx_conf_read(tc, ofs);
 350         reg &= ~(TX39_UARTCTRL1_ENDMARX | TX39_UARTCTRL1_ENDMATX);
 351         tx_conf_write(tc, ofs, reg);
 352
 353         /* enable */
 354         reg = tx_conf_read(tc, ofs);
 355         reg |= TX39_UARTCTRL1_ENUART;
 356         reg &= ~TX39_UARTCTRL1_ENBREAHALT;
 357         tx_conf_write(tc, ofs, reg);
 358
 359         timeout = 100000;
 360
 361         while(!(tx_conf_read(tc, ofs) & TX39_UARTCTRL1_UARTON) &&
 362             --timeout > 0)
 363                 ;
 364
 365         if (timeout == 0 && !cold) {
 366                 printf("%s never power up\n", __txcom_slotname(slot));
 367                 return 1;
 368         }
 369
 370         return 0;
 371 }
 372
 373 void
 374 txcom_disable(struct txcom_chip *chip)
 375 {
 376         tx_chipset_tag_t tc;
 377         txreg_t reg;
 378         int slot;
 379
 380         tc = chip->sc_tc;
 381         slot = chip->sc_slot;
 382
 383         reg = tx_conf_read(tc, TX39_UARTCTRL1_REG(slot));
 384         /* DMA */
 385         reg &= ~(TX39_UARTCTRL1_ENDMARX | TX39_UARTCTRL1_ENDMATX);
 386
 387         /* disable module */
 388         reg &= ~TX39_UARTCTRL1_ENUART;
 389         tx_conf_write(tc, TX39_UARTCTRL1_REG(slot), reg);
 390
 391         /* Clock */
 392         reg = tx_conf_read(tc, TX39_CLOCKCTRL_REG);
 393         reg &= ~(slot ? TX39_CLOCK_ENUARTBCLK : TX39_CLOCK_ENUARTACLK);
 394         tx_conf_write(tc, TX39_CLOCKCTRL_REG, reg);
 395
 396 }
 397
 398 inline int
 399 __txcom_txbufready(struct txcom_chip *chip, int retry)
 400 {
 401         tx_chipset_tag_t tc = chip->sc_tc;
 402         int ofs = TX39_UARTCTRL1_REG(chip->sc_slot);
 403
 404         do {
 405                 if (tx_conf_read(tc, ofs) & TX39_UARTCTRL1_EMPTY)
 406                         return 1;
 407         } while(--retry != 0);
 408
 409         return 0;
 410 }
 411
 412 void
 413 txcom_pulse_mode(struct device *dev)
 414 {
 415         struct txcom_softc *sc = (void*)dev;
 416         struct txcom_chip *chip = sc->sc_chip;
 417         tx_chipset_tag_t tc = chip->sc_tc;
 418         int ofs;
 419         txreg_t reg;
 420
 421         ofs = TX39_UARTCTRL1_REG(chip->sc_slot);
 422
 423         reg = tx_conf_read(tc, ofs);
 424         /* WindowsCE use this setting */
 425         reg |= TX39_UARTCTRL1_PULSEOPT1;
 426         reg &= ~TX39_UARTCTRL1_PULSEOPT2;
 427         reg |= TX39_UARTCTRL1_DTINVERT;
 428
 429         tx_conf_write(tc, ofs, reg);
 430 }
 431
 432 /*
 433  * console
 434  */
 435 int
 436 txcom_cngetc(dev_t dev)
 437 {
 438         tx_chipset_tag_t tc;
 439         int ofs, c, s;
 440
 441         s = spltty();
 442
 443         tc = txcom_chip.sc_tc;
 444         ofs = TX39_UARTCTRL1_REG(txcom_chip.sc_slot);
 445
 446         while(!(TX39_UARTCTRL1_RXHOLDFULL & tx_conf_read(tc, ofs)))
 447                 ;
 448
 449         c = TX39_UARTRXHOLD_RXDATA(
 450                 tx_conf_read(tc, TX39_UARTRXHOLD_REG(txcom_chip.sc_slot)));
 451
 452         if (c == '\r')
 453                 c = '\n';
 454
 455         splx(s);
 456
 457         return c;
 458 }
 459
 460 void
 461 txcom_cnputc(dev_t dev, int c)
 462 {
 463         struct txcom_chip *chip = &txcom_chip;
 464         tx_chipset_tag_t tc = chip->sc_tc;
 465         int s;
 466
 467         s = spltty();
 468
 469         /* Wait for transmitter to empty */
 470         __txcom_txbufready(chip, -1);
 471
 472         tx_conf_write(tc, TX39_UARTTXHOLD_REG(chip->sc_slot),
 473             (c & TX39_UARTTXHOLD_TXDATA_MASK));
 474
 475         __txcom_txbufready(chip, -1);
 476
 477         splx(s);
 478 }
 479
 480 void
 481 txcom_cnpollc(dev_t dev, int on)
 482 {
 483 }
 484
 485 void
 486 txcom_setmode(struct txcom_chip *chip)
 487 {
 488         tcflag_t cflag = chip->sc_cflag;
 489         int ofs = TX39_UARTCTRL1_REG(chip->sc_slot);
 490         txreg_t reg;
 491
 492         reg = tx_conf_read(chip->sc_tc, ofs);
 493         reg &= ~TX39_UARTCTRL1_ENUART;
 494         tx_conf_write(chip->sc_tc, ofs, reg);
 495
 496         switch (ISSET(cflag, CSIZE)) {
 497         default:
 498                 printf("txcom_setmode: CS7, CS8 only. use CS7");
 499                 /* FALL THROUGH */
 500         case CS7:
 501                 reg |= TX39_UARTCTRL1_BIT7;
 502                 break;
 503         case CS8:
 504                 reg &= ~TX39_UARTCTRL1_BIT7;
 505                 break;
 506         }
 507
 508         if (ISSET(cflag, PARENB)) {
 509                 reg |= TX39_UARTCTRL1_ENPARITY;
 510                 if (ISSET(cflag, PARODD)) {
 511                         reg &= ~TX39_UARTCTRL1_EVENPARITY;
 512                 } else {
 513                         reg |= TX39_UARTCTRL1_EVENPARITY;
 514                 }
 515         } else {
 516                 reg &= ~TX39_UARTCTRL1_ENPARITY;
 517         }
 518
 519         if (ISSET(cflag, CSTOPB))
 520                 reg |= TX39_UARTCTRL1_TWOSTOP;
 521         else
 522                 reg &= ~TX39_UARTCTRL1_TWOSTOP;
 523
 524         reg |= TX39_UARTCTRL1_ENUART;
 525         tx_conf_write(chip->sc_tc, ofs, reg);
 526 }
 527
 528 void
 529 txcom_setbaudrate(struct txcom_chip *chip)
 530 {
 531         int baudrate;
 532         int ofs = TX39_UARTCTRL1_REG(chip->sc_slot);
 533         txreg_t reg, reg1;
 534
 535         if (chip->sc_speed == 0)
 536                 return;
 537
 538         if (!cold)
 539                 DPRINTF("%d\n", chip->sc_speed);
 540
 541         reg1 = tx_conf_read(chip->sc_tc, ofs);
 542         reg1 &= ~TX39_UARTCTRL1_ENUART;
 543         tx_conf_write(chip->sc_tc, ofs, reg1);
 544
 545         baudrate = TX39_UARTCLOCKHZ / (chip->sc_speed * 16) - 1;
 546         reg = TX39_UARTCTRL2_BAUDRATE_SET(0, baudrate);
 547
 548         tx_conf_write(chip->sc_tc, TX39_UARTCTRL2_REG(chip->sc_slot), reg);
 549
 550         reg1 |= TX39_UARTCTRL1_ENUART;
 551         tx_conf_write(chip->sc_tc, ofs, reg1);
 552 }
 553
 554 int
 555 txcom_cnattach(int slot, int speed, int cflag)
 556 {
 557         cn_tab = &txcomcons;
 558
 559         txcom_chip.sc_tc        = tx_conf_get_tag();
 560         txcom_chip.sc_slot      = slot;
 561         txcom_chip.sc_cflag     = cflag;
 562         txcom_chip.sc_speed     = speed;
 563         txcom_chip.sc_hwflags |= TXCOM_HW_CONSOLE;
 564 #if notyet
 565         txcom_reset(&txcom_chip);
 566 #endif
 567         txcom_setmode(&txcom_chip);
 568         txcom_setbaudrate(&txcom_chip);
 569
 570         if (txcom_enable(&txcom_chip, true) != 0)
 571                 return 1;
 572
 573         return 0;
 574 }
 575
 576 /*
 577  * tty
 578  */
 579 void
 580 txcom_break(struct txcom_softc *sc, int on)
 581 {
 582         struct txcom_chip *chip = sc->sc_chip;
 583
 584         tx_conf_write(chip->sc_tc, TX39_UARTTXHOLD_REG(chip->sc_slot),
 585             on ? TX39_UARTTXHOLD_BREAK : 0);
 586 }
 587
 588 void
 589 txcom_modem(struct txcom_softc *sc, int on)
 590 {
 591         struct txcom_chip *chip = sc->sc_chip;
 592         tx_chipset_tag_t tc = chip->sc_tc;
 593         int slot = chip->sc_slot;
 594         txreg_t reg;
 595
 596         /* assert DTR */
 597         if (IS_COM0(slot)) {
 598                 config_hook_call(CONFIG_HOOK_SET,
 599                     CONFIG_HOOK_COM0_DTR,
 600                     (void *)on);
 601         }
 602
 603         reg = tx_conf_read(tc, TX39_UARTCTRL1_REG(slot));
 604         reg &= ~TX39_UARTCTRL1_ENUART;
 605         tx_conf_write(tc, TX39_UARTCTRL1_REG(slot), reg);
 606
 607         if (on) {
 608                 reg &= ~TX39_UARTCTRL1_DISTXD;
 609         } else {
 610                 reg |= TX39_UARTCTRL1_DISTXD; /* low UARTTXD */
 611         }
 612
 613         reg |= TX39_UARTCTRL1_ENUART;
 614         tx_conf_write(tc, TX39_UARTCTRL1_REG(slot), reg);
 615 }
 616
 617 void
 618 txcom_shutdown(struct txcom_softc *sc)
 619 {
 620         struct tty *tp = sc->sc_tty;
 621         int s = spltty();
 622
 623         /* Clear any break condition set with TIOCSBRK. */
 624         txcom_break(sc, 0);
 625
 626         /*
 627          * Hang up if necessary.  Wait a bit, so the other side has time to
 628          * notice even if we immediately open the port again.
 629          */
 630         if (ISSET(tp->t_cflag, HUPCL)) {
 631                 txcom_modem(sc, 0);
 632                 (void) tsleep(sc, TTIPRI, ttclos, hz);
 633         }
 634
 635
 636         /* Turn off interrupts if not the console. */
 637         if (!ISSET(sc->sc_chip->sc_hwflags, TXCOM_HW_CONSOLE)) {
 638                 txcom_disable(sc->sc_chip);
 639         }
 640
 641         splx(s);
 642 }
 643
 644 const char *
 645 __txcom_slotname(int slot)
 646 {
 647         static const char *slotname[] = {"UARTA", "UARTB", "unknown"};
 648
 649         if (slot != 0 && slot != 1)
 650                 return slotname[2];
 651
 652         return slotname[slot];
 653 }
 654
 655 int
 656 txcom_frameerr_intr(void *arg)
 657 {
 658         struct txcom_softc *sc = arg;
 659
 660         printf("%s frame error\n", __txcom_slotname(sc->sc_chip->sc_slot));
 661
 662         return 0;
 663 }
 664
 665 int
 666 txcom_parityerr_intr(void *arg)
 667 {
 668         struct txcom_softc *sc = arg;
 669
 670         printf("%s parity error\n", __txcom_slotname(sc->sc_chip->sc_slot));
 671
 672         return 0;
 673 }
 674
 675 int
 676 txcom_break_intr(void *arg)
 677 {
 678         struct txcom_softc *sc = arg;
 679
 680         printf("%s break\n", __txcom_slotname(sc->sc_chip->sc_slot));
 681
 682         return 0;
 683 }
 684
 685 int
 686 txcom_rxintr(void *arg)
 687 {
 688         struct txcom_softc *sc = arg;
 689         struct txcom_chip *chip = sc->sc_chip;
 690         u_int8_t c;
 691
 692         c = TX39_UARTRXHOLD_RXDATA(
 693                 tx_conf_read(chip->sc_tc,
 694                     TX39_UARTRXHOLD_REG(chip->sc_slot)));
 695
 696         sc->sc_rbuf[sc->sc_rbput] = c;
 697         sc->sc_rbput = (sc->sc_rbput + 1) % TXCOM_RING_MASK;
 698
 699         callout_reset(&sc->sc_rxsoft_ch, 1, txcom_rxsoft, sc);
 700
 701         return 0;
 702 }
 703
 704 void
 705 txcom_rxsoft(void *arg)
 706 {
 707         struct txcom_softc *sc = arg;
 708         struct tty *tp = sc->sc_tty;
 709         int (*rint)(int, struct tty *);
 710         int code;
 711         int s, end, get;
 712
 713         rint = tp->t_linesw->l_rint;
 714
 715         s = spltty();
 716         end = sc->sc_rbput;
 717         get = sc->sc_rbget;
 718
 719         while (get != end) {
 720                 code = sc->sc_rbuf[get];
 721
 722                 if ((*rint)(code, tp) == -1) {
 723                         /*
 724                          * The line discipline's buffer is out of space.
 725                          */
 726                 }
 727                 get = (get + 1) % TXCOM_RING_MASK;
 728         }
 729         sc->sc_rbget = get;
 730
 731         splx(s);
 732 }
 733
 734 int
 735 txcom_txintr(void *arg)
 736 {
 737         struct txcom_softc *sc = arg;
 738         struct txcom_chip *chip = sc->sc_chip;
 739         tx_chipset_tag_t tc = chip->sc_tc;
 740
 741         if (sc->sc_tbc > 0) {
 742                 tx_conf_write(tc, TX39_UARTTXHOLD_REG(chip->sc_slot),
 743                     (*sc->sc_tba &
 744                         TX39_UARTTXHOLD_TXDATA_MASK));
 745                 sc->sc_tbc--;
 746                 sc->sc_tba++;
 747         } else {
 748                 callout_reset(&sc->sc_rxsoft_ch, 1, txcom_txsoft, sc);
 749         }
 750
 751         return 0;
 752 }
 753
 754 void
 755 txcom_txsoft(void *arg)
 756 {
 757         struct txcom_softc *sc = arg;
 758         struct tty *tp = sc->sc_tty;
 759         int s = spltty();
 760
 761         CLR(tp->t_state, TS_BUSY);
 762         if (ISSET(tp->t_state, TS_FLUSH)) {
 763                 CLR(tp->t_state, TS_FLUSH);
 764         } else {
 765                 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf));
 766         }
 767
 768         (*tp->t_linesw->l_start)(tp);
 769
 770         splx(s);
 771 }
 772
 773 int
 774 txcomopen(dev_t dev, int flag, int mode, struct lwp *l)
 775 {
 776         struct txcom_softc *sc;
 777         struct txcom_chip *chip;
 778         struct tty *tp;
 779         int s, err = ENXIO;
 780
 781         sc = device_lookup_private(&txcom_cd, minor(dev));
 782         if (sc == NULL)
 783                 return err;
 784
 785         chip = sc->sc_chip;
 786         tp = sc->sc_tty;
 787
 788         if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
 789                 return (EBUSY);
 790
 791         s = spltty();
 792
 793         if (txcom_enable(sc->sc_chip, false)) {
 794                 splx(s);
 795                 goto out;
 796         }
 797         /*
 798          * Do the following iff this is a first open.
 799          */
 800         if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
 801                 struct termios t;
 802
 803                 tp->t_dev = dev;
 804
 805                 t.c_ispeed = 0;
 806                 if (ISSET(chip->sc_hwflags, TXCOM_HW_CONSOLE)) {
 807                         t.c_ospeed = chip->sc_speed;
 808                         t.c_cflag = chip->sc_cflag;
 809                 } else {
 810                         t.c_ospeed = TTYDEF_SPEED;
 811                         t.c_cflag = TTYDEF_CFLAG;
 812                 }
 813
 814                 if (ISSET(chip->sc_swflags, TIOCFLAG_CLOCAL))
 815                         SET(t.c_cflag, CLOCAL);
 816                 if (ISSET(chip->sc_swflags, TIOCFLAG_CRTSCTS))
 817                         SET(t.c_cflag, CRTSCTS);
 818                 if (ISSET(chip->sc_swflags, TIOCFLAG_MDMBUF))
 819                         SET(t.c_cflag, MDMBUF);
 820
 821                 /* Make sure txcomparam() will do something. */
 822                 tp->t_ospeed = 0;
 823                 txcomparam(tp, &t);
 824
 825                 tp->t_iflag = TTYDEF_IFLAG;
 826                 tp->t_oflag = TTYDEF_OFLAG;
 827                 tp->t_lflag = TTYDEF_LFLAG;
 828
 829                 ttychars(tp);
 830                 ttsetwater(tp);
 831
 832                 /*
 833                  * Turn on DTR.  We must always do this, even if carrier is not
 834                  * present, because otherwise we'd have to use TIOCSDTR
 835                  * immediately after setting CLOCAL, which applications do not
 836                  * expect.  We always assert DTR while the device is open
 837                  * unless explicitly requested to deassert it.
 838                  */
 839                 txcom_modem(sc, 1);
 840
 841                 /* Clear the input ring, and unblock. */
 842                 sc->sc_rbget = sc->sc_rbput = 0;
 843         }
 844
 845         splx(s);
 846 #define TXCOMDIALOUT(x) (minor(x) & 0x80000)
 847         if ((err = ttyopen(tp, TXCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)))) {
 848                 DPRINTF("ttyopen failed\n");
 849                 goto out;
 850         }
 851         if ((err = (*tp->t_linesw->l_open)(dev, tp))) {
 852                 DPRINTF("line dicipline open failed\n");
 853                 goto out;
 854         }
 855
 856         return err;
 857
 858  out:
 859         if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
 860                 /*
 861                  * We failed to open the device, and nobody else had it opened.
 862                  * Clean up the state as appropriate.
 863                  */
 864                 txcom_shutdown(sc);
 865         }
 866
 867         return err;
 868
 869 }
 870
 871 int
 872 txcomclose(dev_t dev, int flag, int mode, struct lwp *l)
 873 {
 874         struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
 875         struct tty *tp = sc->sc_tty;
 876
 877         /* XXX This is for cons.c. */
 878         if (!ISSET(tp->t_state, TS_ISOPEN))
 879                 return 0;
 880
 881         (*tp->t_linesw->l_close)(tp, flag);
 882         ttyclose(tp);
 883
 884         if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
 885                 /*
 886                  * Although we got a last close, the device may still be in
 887                  * use; e.g. if this was the dialout node, and there are still
 888                  * processes waiting for carrier on the non-dialout node.
 889                  */
 890                 txcom_shutdown(sc);
 891         }
 892
 893         return 0;
 894 }
 895
 896 int
 897 txcomread(dev_t dev, struct uio *uio, int flag)
 898 {
 899         struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
 900         struct tty *tp = sc->sc_tty;
 901
 902         return ((*tp->t_linesw->l_read)(tp, uio, flag));
 903 }
 904
 905 int
 906 txcomwrite(dev_t dev, struct uio *uio, int flag)
 907 {
 908         struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
 909         struct tty *tp = sc->sc_tty;
 910
 911         return ((*tp->t_linesw->l_write)(tp, uio, flag));
 912 }
 913
 914 int
 915 txcompoll(dev_t dev, int events, struct lwp *l)
 916 {
 917         struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
 918         struct tty *tp = sc->sc_tty;
 919
 920         return ((*tp->t_linesw->l_poll)(tp, events, l));
 921 }
 922
 923 struct tty *
 924 txcomtty(dev_t dev)
 925 {
 926         struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
 927
 928         return sc->sc_tty;
 929 }
 930
 931 int
 932 txcomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
 933 {
 934         struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
 935         struct tty *tp = sc->sc_tty;
 936         int s, err;
 937
 938         err = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l);
 939         if (err != EPASSTHROUGH) {
 940                 return err;
 941         }
 942
 943         err = ttioctl(tp, cmd, data, flag, l);
 944         if (err != EPASSTHROUGH) {
 945                 return err;
 946         }
 947
 948         err = 0;
 949
 950         s = spltty();
 951
 952         switch (cmd) {
 953         default:
 954                 err = EPASSTHROUGH;
 955                 break;
 956
 957         case TIOCSBRK:
 958                 txcom_break(sc, 1);
 959                 break;
 960
 961         case TIOCCBRK:
 962                 txcom_break(sc, 0);
 963                 break;
 964
 965         case TIOCSDTR:
 966                 txcom_modem(sc, 1);
 967                 break;
 968
 969         case TIOCCDTR:
 970                 txcom_modem(sc, 0);
 971                 break;
 972
 973         case TIOCGFLAGS:
 974                 *(int *)data = sc->sc_chip->sc_swflags;
 975                 break;
 976
 977         case TIOCSFLAGS:
 978                 err = kauth_authorize_device_tty(l->l_cred,
 979                     KAUTH_DEVICE_TTY_PRIVSET, tp);
 980                 if (err) {
 981                         break;
 982                 }
 983                 sc->sc_chip->sc_swflags = *(int *)data;
 984                 break;
 985
 986         }
 987
 988         splx(s);
 989
 990         return err;
 991 }
 992
 993 void
 994 txcomstop(struct tty *tp, int flag)
 995 {
 996         struct txcom_softc *sc;
 997         int s;
 998
 999         sc = device_lookup_private(&txcom_cd, minor(tp->t_dev));
1000
1001         s = spltty();
1002
1003         if (ISSET(tp->t_state, TS_BUSY)) {
1004                 /* Stop transmitting at the next chunk. */
1005                 sc->sc_tbc = 0;
1006                 sc->sc_heldtbc = 0;
1007                 if (!ISSET(tp->t_state, TS_TTSTOP))
1008                         SET(tp->t_state, TS_FLUSH);
1009         }
1010
1011         splx(s);
1012 }
1013
1014 void
1015 txcomstart(struct tty *tp)
1016 {
1017         struct txcom_softc *sc;
1018         struct txcom_chip *chip;
1019         tx_chipset_tag_t tc;
1020         int slot;
1021         int s;
1022
1023         sc = device_lookup_private(&txcom_cd, minor(tp->t_dev));
1024         chip = sc->sc_chip;
1025         tc = chip->sc_tc;
1026         slot = chip->sc_slot;
1027
1028         s = spltty();
1029
1030         if (!__txcom_txbufready(chip, 0) ||
1031             ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP))
1032                 goto out;
1033
1034         if (!ttypull(tp))
1035                 goto out;
1036
1037         sc->sc_tba = tp->t_outq.c_cf;
1038         sc->sc_tbc = ndqb(&tp->t_outq, 0);
1039         SET(tp->t_state, TS_BUSY);
1040
1041         /* Output the first character of the contiguous buffer. */
1042         tx_conf_write(tc, TX39_UARTTXHOLD_REG(slot),
1043             (*sc->sc_tba & TX39_UARTTXHOLD_TXDATA_MASK));
1044
1045         sc->sc_tbc--;
1046         sc->sc_tba++;
1047
1048  out:
1049         splx(s);
1050 }
1051
1052 /*
1053  * Set TXcom tty parameters from termios.
1054  */
1055 int
1056 txcomparam(struct tty *tp, struct termios *t)
1057 {
1058         struct txcom_softc *sc;
1059         struct txcom_chip *chip;
1060         int ospeed;
1061         int s;
1062
1063         sc = device_lookup_private(&txcom_cd, minor(tp->t_dev));
1064         if (sc == NULL)
1065                 return ENXIO;
1066
1067         ospeed = t->c_ospeed;
1068
1069         /* Check requested parameters. */
1070         if (ospeed < 0) {
1071                 return EINVAL;
1072         }
1073         if (t->c_ispeed && t->c_ispeed != ospeed) {
1074                 return EINVAL;
1075         }
1076
1077         s = spltty();
1078         chip = sc->sc_chip;
1079         /*
1080          * For the console, always force CLOCAL and !HUPCL, so that the port
1081          * is always active.
1082          */
1083         if (ISSET(chip->sc_swflags, TIOCFLAG_SOFTCAR) ||
1084             ISSET(chip->sc_hwflags, TXCOM_HW_CONSOLE)) {
1085                 SET(t->c_cflag, CLOCAL);
1086                 CLR(t->c_cflag, HUPCL);
1087         }
1088         splx(s);
1089
1090         /*
1091          * If we're not in a mode that assumes a connection is present, then
1092          * ignore carrier changes.
1093          */
1094         if (ISSET(t->c_cflag, CLOCAL | MDMBUF))
1095                 chip->sc_dcd = 0;
1096         else
1097                 chip->sc_dcd = 1;
1098
1099         /*
1100          * Only whack the UART when params change.
1101          * Some callers need to clear tp->t_ospeed
1102          * to make sure initialization gets done.
1103          */
1104         if (tp->t_ospeed == ospeed && tp->t_cflag == t->c_cflag) {
1105                 return 0;
1106         }
1107
1108         s = spltty();
1109         chip = sc->sc_chip;
1110         chip->sc_speed = ospeed;
1111         chip->sc_cflag = t->c_cflag;
1112
1113         txcom_setmode(chip);
1114         txcom_setbaudrate(chip);
1115
1116         /* And copy to tty. */
1117         tp->t_ispeed = 0;
1118         tp->t_ospeed = chip->sc_speed;
1119         tp->t_cflag = chip->sc_cflag;
1120
1121         /*
1122          * Update the tty layer's idea of the carrier bit, in case we changed
1123          * CLOCAL or MDMBUF.  We don't hang up here; we only do that by
1124          * explicit request.
1125          */
1126         (void) (*tp->t_linesw->l_modem)(tp, chip->sc_dcd);
1127
1128         /*
1129          * If hardware flow control is disabled, unblock any hard flow
1130          * control state.
1131          */
1132         if (!ISSET(chip->sc_cflag, CHWFLOW)) {
1133                 txcomstart(tp);
1134         }
1135
1136         splx(s);
1137
1138         return 0;
1139 }
1140
1141 int
1142 txcom_dcd_hook(void *arg, int type, long id, void *msg)
1143 {
1144         struct txcom_softc *sc = arg;
1145         struct tty *tp = sc->sc_tty;
1146         struct txcom_chip *chip = sc->sc_chip;
1147         int modem = !(int)msg; /* p-edge 1, n-edge 0 */
1148
1149         DPRINTF("DCD %s\n", modem ? "ON" : "OFF");
1150
1151         if (modem && chip->sc_dcd)
1152                 (void) (*tp->t_linesw->l_modem)(tp, chip->sc_dcd);
1153
1154         return 0;
1155 }
1156
1157 int
1158 txcom_cts_hook(void *arg, int type, long id, void *msg)
1159 {
1160         struct txcom_softc *sc = arg;
1161         struct tty *tp = sc->sc_tty;
1162         struct txcom_chip *chip = sc->sc_chip;
1163         int clear = !(int)msg; /* p-edge 1, n-edge 0 */
1164
1165         DPRINTF("CTS %s\n", clear ? "ON"  : "OFF");
1166
1167         if (chip->sc_msr_cts) {
1168                 if (!clear) {
1169                         chip->sc_tx_stopped = 1;
1170                 } else {
1171                         chip->sc_tx_stopped = 0;
1172                         (*tp->t_linesw->l_start)(tp);
1173                 }
1174         }
1175
1176         return 0;
1177 }
1178
1179 #ifdef TX39UARTDEBUG
1180 void
1181 txcom_dump(struct txcom_chip *chip)
1182 {
1183         tx_chipset_tag_t tc = chip->sc_tc;
1184         int slot = chip->sc_slot;
1185         txreg_t reg;
1186
1187         reg = tx_conf_read(tc, TX39_UARTCTRL1_REG(slot));
1188 #define ISSETPRINT(r, m) \
1189         dbg_bitmask_print(r, TX39_UARTCTRL1_##m, #m)
1190         ISSETPRINT(reg, UARTON);
1191         ISSETPRINT(reg, EMPTY);
1192         ISSETPRINT(reg, PRXHOLDFULL);
1193         ISSETPRINT(reg, RXHOLDFULL);
1194         ISSETPRINT(reg, ENDMARX);
1195         ISSETPRINT(reg, ENDMATX);
1196         ISSETPRINT(reg, TESTMODE);
1197         ISSETPRINT(reg, ENBREAHALT);
1198         ISSETPRINT(reg, ENDMATEST);
1199         ISSETPRINT(reg, ENDMALOOP);
1200         ISSETPRINT(reg, PULSEOPT2);
1201         ISSETPRINT(reg, PULSEOPT1);
1202         ISSETPRINT(reg, DTINVERT);
1203         ISSETPRINT(reg, DISTXD);
1204         ISSETPRINT(reg, TWOSTOP);
1205         ISSETPRINT(reg, LOOPBACK);
1206         ISSETPRINT(reg, BIT7);
1207         ISSETPRINT(reg, EVENPARITY);
1208         ISSETPRINT(reg, ENPARITY);
1209         ISSETPRINT(reg, ENUART);
1210 }
1211 #endif /* TX39UARTDEBUG */