sci.c revision 1.24
1 /* $NetBSD: sci.c,v 1.24 2002/04/28 11:38:48 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (C) 1999 T.Horiuchi and SAITOH Masanobu. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /*- 30 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 31 * All rights reserved. 32 * 33 * This code is derived from software contributed to The NetBSD Foundation 34 * by Charles M. Hannum. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the NetBSD 47 * Foundation, Inc. and its contributors. 48 * 4. Neither the name of The NetBSD Foundation nor the names of its 49 * contributors may be used to endorse or promote products derived 50 * from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 53 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 54 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 55 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 56 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 57 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 58 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 59 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 60 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 61 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 62 * POSSIBILITY OF SUCH DAMAGE. 63 */ 64 65 /* 66 * Copyright (c) 1991 The Regents of the University of California. 67 * All rights reserved. 68 * 69 * Redistribution and use in source and binary forms, with or without 70 * modification, are permitted provided that the following conditions 71 * are met: 72 * 1. Redistributions of source code must retain the above copyright 73 * notice, this list of conditions and the following disclaimer. 74 * 2. Redistributions in binary form must reproduce the above copyright 75 * notice, this list of conditions and the following disclaimer in the 76 * documentation and/or other materials provided with the distribution. 77 * 3. All advertising materials mentioning features or use of this software 78 * must display the following acknowledgement: 79 * This product includes software developed by the University of 80 * California, Berkeley and its contributors. 81 * 4. Neither the name of the University nor the names of its contributors 82 * may be used to endorse or promote products derived from this software 83 * without specific prior written permission. 84 * 85 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 86 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 87 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 88 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 89 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 90 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 91 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 92 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 93 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 94 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 95 * SUCH DAMAGE. 96 * 97 * @(#)com.c 7.5 (Berkeley) 5/16/91 98 */ 99 100 /* 101 * SH internal serial driver 102 * 103 * This code is derived from both z8530tty.c and com.c 104 */ 105 106 #include "opt_kgdb.h" 107 #include "opt_sci.h" 108 109 #include <sys/param.h> 110 #include <sys/systm.h> 111 #include <sys/tty.h> 112 #include <sys/proc.h> 113 #include <sys/conf.h> 114 #include <sys/file.h> 115 #include <sys/syslog.h> 116 #include <sys/kernel.h> 117 #include <sys/device.h> 118 #include <sys/malloc.h> 119 120 #include <dev/cons.h> 121 122 #include <sh3/clock.h> 123 #include <sh3/scireg.h> 124 #include <sh3/pfcreg.h> 125 #include <sh3/tmureg.h> 126 #include <sh3/exception.h> 127 #include <machine/intr.h> 128 129 static void scistart(struct tty *); 130 static int sciparam(struct tty *, struct termios *); 131 132 void scicnprobe(struct consdev *); 133 void scicninit(struct consdev *); 134 void scicnputc(dev_t, int); 135 int scicngetc(dev_t); 136 void scicnpoolc(dev_t, int); 137 int sciintr(void *); 138 139 struct sci_softc { 140 struct device sc_dev; /* boilerplate */ 141 struct tty *sc_tty; 142 void *sc_si; 143 struct callout sc_diag_ch; 144 145 #if 0 146 bus_space_tag_t sc_iot; /* ISA i/o space identifier */ 147 bus_space_handle_t sc_ioh; /* ISA io handle */ 148 149 int sc_drq; 150 151 int sc_frequency; 152 #endif 153 154 u_int sc_overflows, 155 sc_floods, 156 sc_errors; /* number of retries so far */ 157 u_char sc_status[7]; /* copy of registers */ 158 159 int sc_hwflags; 160 int sc_swflags; 161 u_int sc_fifolen; /* XXX always 0? */ 162 163 u_int sc_r_hiwat, 164 sc_r_lowat; 165 u_char *volatile sc_rbget, 166 *volatile sc_rbput; 167 volatile u_int sc_rbavail; 168 u_char *sc_rbuf, 169 *sc_ebuf; 170 171 u_char *sc_tba; /* transmit buffer address */ 172 u_int sc_tbc, /* transmit byte count */ 173 sc_heldtbc; 174 175 volatile u_char sc_rx_flags, /* receiver blocked */ 176 #define RX_TTY_BLOCKED 0x01 177 #define RX_TTY_OVERFLOWED 0x02 178 #define RX_IBUF_BLOCKED 0x04 179 #define RX_IBUF_OVERFLOWED 0x08 180 #define RX_ANY_BLOCK 0x0f 181 sc_tx_busy, /* working on an output chunk */ 182 sc_tx_done, /* done with one output chunk */ 183 sc_tx_stopped, /* H/W level stop (lost CTS) */ 184 sc_st_check, /* got a status interrupt */ 185 sc_rx_ready; 186 187 volatile u_char sc_heldchange; 188 }; 189 190 /* controller driver configuration */ 191 static int sci_match(struct device *, struct cfdata *, void *); 192 static void sci_attach(struct device *, struct device *, void *); 193 194 void sci_break(struct sci_softc *, int); 195 void sci_iflush(struct sci_softc *); 196 197 #define integrate static inline 198 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 199 void scisoft(void *); 200 #else 201 #ifndef __NO_SOFT_SERIAL_INTERRUPT 202 void scisoft(void); 203 #else 204 void scisoft(void *); 205 #endif 206 #endif 207 integrate void sci_rxsoft(struct sci_softc *, struct tty *); 208 integrate void sci_txsoft(struct sci_softc *, struct tty *); 209 integrate void sci_stsoft(struct sci_softc *, struct tty *); 210 integrate void sci_schedrx(struct sci_softc *); 211 void scidiag(void *); 212 213 #define SCIUNIT_MASK 0x7ffff 214 #define SCIDIALOUT_MASK 0x80000 215 216 #define SCIUNIT(x) (minor(x) & SCIUNIT_MASK) 217 #define SCIDIALOUT(x) (minor(x) & SCIDIALOUT_MASK) 218 219 /* Macros to clear/set/test flags. */ 220 #define SET(t, f) (t) |= (f) 221 #define CLR(t, f) (t) &= ~(f) 222 #define ISSET(t, f) ((t) & (f)) 223 224 /* Hardware flag masks */ 225 #define SCI_HW_NOIEN 0x01 226 #define SCI_HW_FIFO 0x02 227 #define SCI_HW_FLOW 0x08 228 #define SCI_HW_DEV_OK 0x20 229 #define SCI_HW_CONSOLE 0x40 230 #define SCI_HW_KGDB 0x80 231 232 /* Buffer size for character buffer */ 233 #define SCI_RING_SIZE 2048 234 235 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 236 u_int sci_rbuf_hiwat = (SCI_RING_SIZE * 1) / 4; 237 u_int sci_rbuf_lowat = (SCI_RING_SIZE * 3) / 4; 238 239 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 240 int sciconscflag = CONMODE; 241 int sciisconsole = 0; 242 243 #ifdef SCICN_SPEED 244 int scicn_speed = SCICN_SPEED; 245 #else 246 int scicn_speed = 9600; 247 #endif 248 249 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 250 251 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 252 #ifdef __NO_SOFT_SERIAL_INTERRUPT 253 volatile int sci_softintr_scheduled; 254 struct callout sci_soft_ch = CALLOUT_INITIALIZER; 255 #endif 256 #endif 257 258 u_int sci_rbuf_size = SCI_RING_SIZE; 259 260 struct cfattach sci_ca = { 261 sizeof(struct sci_softc), sci_match, sci_attach 262 }; 263 264 extern struct cfdriver sci_cd; 265 266 cdev_decl(sci); 267 268 void InitializeSci (unsigned int); 269 270 /* 271 * following functions are debugging prupose only 272 */ 273 #define CR 0x0D 274 #define I2C_ADRS (*(volatile unsigned int *)0xa8000000) 275 #define USART_ON (unsigned int)~0x08 276 277 void sci_putc(unsigned char); 278 unsigned char sci_getc(void); 279 int SciErrCheck(void); 280 281 /* 282 * InitializeSci 283 * : unsigned int bps; 284 * : SCI(Serial Communication Interface) 285 */ 286 287 void 288 InitializeSci(unsigned int bps) 289 { 290 291 /* Initialize SCR */ 292 SHREG_SCSCR = 0x00; 293 294 /* Serial Mode Register */ 295 SHREG_SCSMR = 0x00; /* Async,8bit,NonParity,Even,1Stop,NoMulti */ 296 297 /* Bit Rate Register */ 298 SHREG_SCBRR = divrnd(sh_clock_get_pclock(), 32 * bps) - 1; 299 300 /* 301 * wait 1mSec, because Send/Recv must begin 1 bit period after 302 * BRR is set. 303 */ 304 delay(1000); 305 306 /* Send permission, Receive permission ON */ 307 SHREG_SCSCR = SCSCR_TE | SCSCR_RE; 308 309 /* Serial Status Register */ 310 SHREG_SCSSR &= SCSSR_TDRE; /* Clear Status */ 311 312 #if 0 313 I2C_ADRS &= ~0x08; /* enable RS-232C */ 314 #endif 315 } 316 317 318 /* 319 * sci_putc 320 * : unsigned char c; 321 */ 322 void 323 sci_putc(unsigned char c) 324 { 325 326 if (c == '\n') 327 sci_putc('\r'); 328 329 /* wait for ready */ 330 while ((SHREG_SCSSR & SCSSR_TDRE) == NULL) 331 ; 332 333 /* write send data to send register */ 334 SHREG_SCTDR = c; 335 336 /* clear ready flag */ 337 SHREG_SCSSR &= ~SCSSR_TDRE; 338 } 339 340 /* 341 * : SciErrCheck 342 * 0x20 = over run 343 * 0x10 = frame error 344 * 0x80 = parity error 345 */ 346 int 347 SciErrCheck(void) 348 { 349 350 return(SHREG_SCSSR & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)); 351 } 352 353 /* 354 * sci_getc 355 */ 356 unsigned char 357 sci_getc(void) 358 { 359 unsigned char c, err_c; 360 361 while (((err_c = SHREG_SCSSR) 362 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) == 0) 363 ; 364 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 365 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 366 return(err_c |= 0x80); 367 } 368 369 c = SHREG_SCRDR; 370 371 SHREG_SCSSR &= ~SCSSR_RDRF; 372 373 return(c); 374 } 375 376 #if 0 377 #define SCI_MAX_UNITS 2 378 #else 379 #define SCI_MAX_UNITS 1 380 #endif 381 382 383 static int 384 sci_match(struct device *parent, struct cfdata *cfp, void *aux) 385 { 386 387 if (strcmp(cfp->cf_driver->cd_name, "sci") 388 || cfp->cf_unit >= SCI_MAX_UNITS) //XXX __BROKEN_CONFIG_UNIT_USAGE 389 return 0; 390 391 return 1; 392 } 393 394 static void 395 sci_attach(struct device *parent, struct device *self, void *aux) 396 { 397 struct sci_softc *sc = (struct sci_softc *)self; 398 struct tty *tp; 399 400 sc->sc_hwflags = 0; /* XXX */ 401 sc->sc_swflags = 0; /* XXX */ 402 sc->sc_fifolen = 0; /* XXX */ 403 404 if (sciisconsole) { 405 SET(sc->sc_hwflags, SCI_HW_CONSOLE); 406 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 407 printf("\n%s: console\n", sc->sc_dev.dv_xname); 408 } else { 409 InitializeSci(9600); 410 printf("\n"); 411 } 412 413 callout_init(&sc->sc_diag_ch); 414 415 intc_intr_establish(SH_INTEVT_SCI_ERI, IST_LEVEL, IPL_SERIAL, sciintr, 416 sc); 417 intc_intr_establish(SH_INTEVT_SCI_RXI, IST_LEVEL, IPL_SERIAL, sciintr, 418 sc); 419 intc_intr_establish(SH_INTEVT_SCI_TXI, IST_LEVEL, IPL_SERIAL, sciintr, 420 sc); 421 intc_intr_establish(SH_INTEVT_SCI_TEI, IST_LEVEL, IPL_SERIAL, sciintr, 422 sc); 423 424 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 425 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, scisoft, sc); 426 #endif 427 SET(sc->sc_hwflags, SCI_HW_DEV_OK); 428 429 tp = ttymalloc(); 430 tp->t_oproc = scistart; 431 tp->t_param = sciparam; 432 tp->t_hwiflow = NULL; 433 434 sc->sc_tty = tp; 435 sc->sc_rbuf = malloc(sci_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 436 if (sc->sc_rbuf == NULL) { 437 printf("%s: unable to allocate ring buffer\n", 438 sc->sc_dev.dv_xname); 439 return; 440 } 441 sc->sc_ebuf = sc->sc_rbuf + (sci_rbuf_size << 1); 442 443 tty_attach(tp); 444 } 445 446 /* 447 * Start or restart transmission. 448 */ 449 static void 450 scistart(struct tty *tp) 451 { 452 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 453 int s; 454 455 s = spltty(); 456 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 457 goto out; 458 if (sc->sc_tx_stopped) 459 goto out; 460 461 if (tp->t_outq.c_cc <= tp->t_lowat) { 462 if (ISSET(tp->t_state, TS_ASLEEP)) { 463 CLR(tp->t_state, TS_ASLEEP); 464 wakeup(&tp->t_outq); 465 } 466 selwakeup(&tp->t_wsel); 467 if (tp->t_outq.c_cc == 0) 468 goto out; 469 } 470 471 /* Grab the first contiguous region of buffer space. */ 472 { 473 u_char *tba; 474 int tbc; 475 476 tba = tp->t_outq.c_cf; 477 tbc = ndqb(&tp->t_outq, 0); 478 479 (void)splserial(); 480 481 sc->sc_tba = tba; 482 sc->sc_tbc = tbc; 483 } 484 485 SET(tp->t_state, TS_BUSY); 486 sc->sc_tx_busy = 1; 487 488 /* Enable transmit completion interrupts if necessary. */ 489 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 490 491 /* Output the first byte of the contiguous buffer. */ 492 { 493 if (sc->sc_tbc > 0) { 494 sci_putc(*(sc->sc_tba)); 495 sc->sc_tba++; 496 sc->sc_tbc--; 497 } 498 } 499 out: 500 splx(s); 501 return; 502 } 503 504 /* 505 * Set SCI tty parameters from termios. 506 * XXX - Should just copy the whole termios after 507 * making sure all the changes could be done. 508 */ 509 static int 510 sciparam(struct tty *tp, struct termios *t) 511 { 512 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 513 int ospeed = t->c_ospeed; 514 int s; 515 516 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 517 return (EIO); 518 519 /* Check requested parameters. */ 520 if (ospeed < 0) 521 return (EINVAL); 522 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 523 return (EINVAL); 524 525 /* 526 * For the console, always force CLOCAL and !HUPCL, so that the port 527 * is always active. 528 */ 529 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 530 ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 531 SET(t->c_cflag, CLOCAL); 532 CLR(t->c_cflag, HUPCL); 533 } 534 535 /* 536 * If there were no changes, don't do anything. This avoids dropping 537 * input and improves performance when all we did was frob things like 538 * VMIN and VTIME. 539 */ 540 if (tp->t_ospeed == t->c_ospeed && 541 tp->t_cflag == t->c_cflag) 542 return (0); 543 544 #if 0 545 /* XXX (msaitoh) */ 546 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 547 #endif 548 549 s = splserial(); 550 551 /* 552 * Set the FIFO threshold based on the receive speed. 553 * 554 * * If it's a low speed, it's probably a mouse or some other 555 * interactive device, so set the threshold low. 556 * * If it's a high speed, trim the trigger level down to prevent 557 * overflows. 558 * * Otherwise set it a bit higher. 559 */ 560 #if 0 561 /* XXX (msaitoh) */ 562 if (ISSET(sc->sc_hwflags, SCI_HW_HAYESP)) 563 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 564 else if (ISSET(sc->sc_hwflags, SCI_HW_FIFO)) 565 sc->sc_fifo = FIFO_ENABLE | 566 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 567 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 568 else 569 sc->sc_fifo = 0; 570 #endif 571 572 /* And copy to tty. */ 573 tp->t_ispeed = 0; 574 tp->t_ospeed = t->c_ospeed; 575 tp->t_cflag = t->c_cflag; 576 577 if (!sc->sc_heldchange) { 578 if (sc->sc_tx_busy) { 579 sc->sc_heldtbc = sc->sc_tbc; 580 sc->sc_tbc = 0; 581 sc->sc_heldchange = 1; 582 } 583 #if 0 584 /* XXX (msaitoh) */ 585 else 586 sci_loadchannelregs(sc); 587 #endif 588 } 589 590 if (!ISSET(t->c_cflag, CHWFLOW)) { 591 /* Disable the high water mark. */ 592 sc->sc_r_hiwat = 0; 593 sc->sc_r_lowat = 0; 594 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 595 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 596 sci_schedrx(sc); 597 } 598 } else { 599 sc->sc_r_hiwat = sci_rbuf_hiwat; 600 sc->sc_r_lowat = sci_rbuf_lowat; 601 } 602 603 splx(s); 604 605 #ifdef SCI_DEBUG 606 if (sci_debug) 607 scistatus(sc, "sciparam "); 608 #endif 609 610 if (!ISSET(t->c_cflag, CHWFLOW)) { 611 if (sc->sc_tx_stopped) { 612 sc->sc_tx_stopped = 0; 613 scistart(tp); 614 } 615 } 616 617 return (0); 618 } 619 620 void 621 sci_iflush(struct sci_softc *sc) 622 { 623 unsigned char err_c; 624 volatile unsigned char c; 625 626 if (((err_c = SHREG_SCSSR) 627 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 628 629 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 630 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 631 return; 632 } 633 634 c = SHREG_SCRDR; 635 636 SHREG_SCSSR &= ~SCSSR_RDRF; 637 } 638 } 639 640 int 641 sciopen(dev_t dev, int flag, int mode, struct proc *p) 642 { 643 int unit = SCIUNIT(dev); 644 struct sci_softc *sc; 645 struct tty *tp; 646 int s, s2; 647 int error; 648 649 if (unit >= sci_cd.cd_ndevs) 650 return (ENXIO); 651 sc = sci_cd.cd_devs[unit]; 652 if (sc == 0 || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK) || 653 sc->sc_rbuf == NULL) 654 return (ENXIO); 655 656 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 657 return (ENXIO); 658 659 #ifdef KGDB 660 /* 661 * If this is the kgdb port, no other use is permitted. 662 */ 663 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) 664 return (EBUSY); 665 #endif 666 667 tp = sc->sc_tty; 668 669 if (ISSET(tp->t_state, TS_ISOPEN) && 670 ISSET(tp->t_state, TS_XCLUDE) && 671 p->p_ucred->cr_uid != 0) 672 return (EBUSY); 673 674 s = spltty(); 675 676 /* 677 * Do the following iff this is a first open. 678 */ 679 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 680 struct termios t; 681 682 tp->t_dev = dev; 683 684 s2 = splserial(); 685 686 /* Turn on interrupts. */ 687 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 688 689 splx(s2); 690 691 /* 692 * Initialize the termios status to the defaults. Add in the 693 * sticky bits from TIOCSFLAGS. 694 */ 695 t.c_ispeed = 0; 696 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 697 t.c_ospeed = scicn_speed; 698 t.c_cflag = sciconscflag; 699 } else { 700 t.c_ospeed = TTYDEF_SPEED; 701 t.c_cflag = TTYDEF_CFLAG; 702 } 703 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 704 SET(t.c_cflag, CLOCAL); 705 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 706 SET(t.c_cflag, CRTSCTS); 707 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 708 SET(t.c_cflag, MDMBUF); 709 /* Make sure sciparam() will do something. */ 710 tp->t_ospeed = 0; 711 (void) sciparam(tp, &t); 712 tp->t_iflag = TTYDEF_IFLAG; 713 tp->t_oflag = TTYDEF_OFLAG; 714 tp->t_lflag = TTYDEF_LFLAG; 715 ttychars(tp); 716 ttsetwater(tp); 717 718 s2 = splserial(); 719 720 /* Clear the input ring, and unblock. */ 721 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 722 sc->sc_rbavail = sci_rbuf_size; 723 sci_iflush(sc); 724 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 725 #if 0 726 /* XXX (msaitoh) */ 727 sci_hwiflow(sc); 728 #endif 729 730 #ifdef SCI_DEBUG 731 if (sci_debug) 732 scistatus(sc, "sciopen "); 733 #endif 734 735 splx(s2); 736 } 737 738 splx(s); 739 740 error = ttyopen(tp, SCIDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 741 if (error) 742 goto bad; 743 744 error = (*tp->t_linesw->l_open)(dev, tp); 745 if (error) 746 goto bad; 747 748 return (0); 749 750 bad: 751 752 return (error); 753 } 754 755 int 756 sciclose(dev_t dev, int flag, int mode, struct proc *p) 757 { 758 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 759 struct tty *tp = sc->sc_tty; 760 761 /* XXX This is for cons.c. */ 762 if (!ISSET(tp->t_state, TS_ISOPEN)) 763 return (0); 764 765 (*tp->t_linesw->l_close)(tp, flag); 766 ttyclose(tp); 767 768 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 769 return (0); 770 771 return (0); 772 } 773 774 int 775 sciread(dev_t dev, struct uio *uio, int flag) 776 { 777 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 778 struct tty *tp = sc->sc_tty; 779 780 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 781 } 782 783 int 784 sciwrite(dev_t dev, struct uio *uio, int flag) 785 { 786 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 787 struct tty *tp = sc->sc_tty; 788 789 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 790 } 791 792 int 793 scipoll(dev_t dev, int events, struct proc *p) 794 { 795 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 796 struct tty *tp = sc->sc_tty; 797 798 return ((*tp->t_linesw->l_poll)(tp, events, p)); 799 } 800 801 struct tty * 802 scitty(dev_t dev) 803 { 804 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 805 struct tty *tp = sc->sc_tty; 806 807 return (tp); 808 } 809 810 int 811 sciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 812 { 813 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 814 struct tty *tp = sc->sc_tty; 815 int error; 816 int s; 817 818 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 819 return (EIO); 820 821 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 822 if (error != EPASSTHROUGH) 823 return (error); 824 825 error = ttioctl(tp, cmd, data, flag, p); 826 if (error != EPASSTHROUGH) 827 return (error); 828 829 error = 0; 830 831 s = splserial(); 832 833 switch (cmd) { 834 case TIOCSBRK: 835 sci_break(sc, 1); 836 break; 837 838 case TIOCCBRK: 839 sci_break(sc, 0); 840 break; 841 842 case TIOCGFLAGS: 843 *(int *)data = sc->sc_swflags; 844 break; 845 846 case TIOCSFLAGS: 847 error = suser(p->p_ucred, &p->p_acflag); 848 if (error) 849 break; 850 sc->sc_swflags = *(int *)data; 851 break; 852 853 default: 854 error = EPASSTHROUGH; 855 break; 856 } 857 858 splx(s); 859 860 return (error); 861 } 862 863 integrate void 864 sci_schedrx(struct sci_softc *sc) 865 { 866 867 sc->sc_rx_ready = 1; 868 869 /* Wake up the poller. */ 870 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 871 softintr_schedule(sc->sc_si); 872 #else 873 #ifndef __NO_SOFT_SERIAL_INTERRUPT 874 setsoftserial(); 875 #else 876 if (!sci_softintr_scheduled) { 877 sci_softintr_scheduled = 1; 878 callout_reset(&sci_soft_ch, 1, scisoft, NULL); 879 } 880 #endif 881 #endif 882 } 883 884 void 885 sci_break(struct sci_softc *sc, int onoff) 886 { 887 888 if (onoff) 889 SHREG_SCSSR &= ~SCSSR_TDRE; 890 else 891 SHREG_SCSSR |= SCSSR_TDRE; 892 893 #if 0 /* XXX */ 894 if (!sc->sc_heldchange) { 895 if (sc->sc_tx_busy) { 896 sc->sc_heldtbc = sc->sc_tbc; 897 sc->sc_tbc = 0; 898 sc->sc_heldchange = 1; 899 } else 900 sci_loadchannelregs(sc); 901 } 902 #endif 903 } 904 905 /* 906 * Stop output, e.g., for ^S or output flush. 907 */ 908 void 909 scistop(struct tty *tp, int flag) 910 { 911 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 912 int s; 913 914 s = splserial(); 915 if (ISSET(tp->t_state, TS_BUSY)) { 916 /* Stop transmitting at the next chunk. */ 917 sc->sc_tbc = 0; 918 sc->sc_heldtbc = 0; 919 if (!ISSET(tp->t_state, TS_TTSTOP)) 920 SET(tp->t_state, TS_FLUSH); 921 } 922 splx(s); 923 } 924 925 void 926 scidiag(void *arg) 927 { 928 struct sci_softc *sc = arg; 929 int overflows, floods; 930 int s; 931 932 s = splserial(); 933 overflows = sc->sc_overflows; 934 sc->sc_overflows = 0; 935 floods = sc->sc_floods; 936 sc->sc_floods = 0; 937 sc->sc_errors = 0; 938 splx(s); 939 940 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 941 sc->sc_dev.dv_xname, 942 overflows, overflows == 1 ? "" : "s", 943 floods, floods == 1 ? "" : "s"); 944 } 945 946 integrate void 947 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 948 { 949 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 950 u_char *get, *end; 951 u_int cc, scc; 952 u_char ssr; 953 int code; 954 int s; 955 956 end = sc->sc_ebuf; 957 get = sc->sc_rbget; 958 scc = cc = sci_rbuf_size - sc->sc_rbavail; 959 960 if (cc == sci_rbuf_size) { 961 sc->sc_floods++; 962 if (sc->sc_errors++ == 0) 963 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 964 } 965 966 while (cc) { 967 code = get[0]; 968 ssr = get[1]; 969 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 970 if (ISSET(ssr, SCSSR_FER)) 971 SET(code, TTY_FE); 972 if (ISSET(ssr, SCSSR_PER)) 973 SET(code, TTY_PE); 974 } 975 if ((*rint)(code, tp) == -1) { 976 /* 977 * The line discipline's buffer is out of space. 978 */ 979 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 980 /* 981 * We're either not using flow control, or the 982 * line discipline didn't tell us to block for 983 * some reason. Either way, we have no way to 984 * know when there's more space available, so 985 * just drop the rest of the data. 986 */ 987 get += cc << 1; 988 if (get >= end) 989 get -= sci_rbuf_size << 1; 990 cc = 0; 991 } else { 992 /* 993 * Don't schedule any more receive processing 994 * until the line discipline tells us there's 995 * space available (through scihwiflow()). 996 * Leave the rest of the data in the input 997 * buffer. 998 */ 999 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1000 } 1001 break; 1002 } 1003 get += 2; 1004 if (get >= end) 1005 get = sc->sc_rbuf; 1006 cc--; 1007 } 1008 1009 if (cc != scc) { 1010 sc->sc_rbget = get; 1011 s = splserial(); 1012 cc = sc->sc_rbavail += scc - cc; 1013 /* Buffers should be ok again, release possible block. */ 1014 if (cc >= sc->sc_r_lowat) { 1015 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1016 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1017 SHREG_SCSCR |= SCSCR_RIE; 1018 } 1019 #if 0 1020 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1021 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1022 sci_hwiflow(sc); 1023 } 1024 #endif 1025 } 1026 splx(s); 1027 } 1028 } 1029 1030 integrate void 1031 sci_txsoft(sc, tp) 1032 struct sci_softc *sc; 1033 struct tty *tp; 1034 { 1035 1036 CLR(tp->t_state, TS_BUSY); 1037 if (ISSET(tp->t_state, TS_FLUSH)) 1038 CLR(tp->t_state, TS_FLUSH); 1039 else 1040 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1041 (*tp->t_linesw->l_start)(tp); 1042 } 1043 1044 integrate void 1045 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1046 { 1047 #if 0 1048 /* XXX (msaitoh) */ 1049 u_char msr, delta; 1050 int s; 1051 1052 s = splserial(); 1053 msr = sc->sc_msr; 1054 delta = sc->sc_msr_delta; 1055 sc->sc_msr_delta = 0; 1056 splx(s); 1057 1058 if (ISSET(delta, sc->sc_msr_dcd)) { 1059 /* 1060 * Inform the tty layer that carrier detect changed. 1061 */ 1062 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1063 } 1064 1065 if (ISSET(delta, sc->sc_msr_cts)) { 1066 /* Block or unblock output according to flow control. */ 1067 if (ISSET(msr, sc->sc_msr_cts)) { 1068 sc->sc_tx_stopped = 0; 1069 (*tp->t_linesw->l_start)(tp); 1070 } else { 1071 sc->sc_tx_stopped = 1; 1072 } 1073 } 1074 1075 #ifdef SCI_DEBUG 1076 if (sci_debug) 1077 scistatus(sc, "sci_stsoft"); 1078 #endif 1079 #endif 1080 } 1081 1082 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1083 void 1084 scisoft(void *arg) 1085 { 1086 struct sci_softc *sc = arg; 1087 struct tty *tp; 1088 1089 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1090 return; 1091 1092 { 1093 #else 1094 void 1095 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1096 scisoft() 1097 #else 1098 scisoft(void *arg) 1099 #endif 1100 { 1101 struct sci_softc *sc; 1102 struct tty *tp; 1103 int unit; 1104 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1105 int s; 1106 1107 s = splsoftserial(); 1108 sci_softintr_scheduled = 0; 1109 #endif 1110 1111 for (unit = 0; unit < sci_cd.cd_ndevs; unit++) { 1112 sc = sci_cd.cd_devs[unit]; 1113 if (sc == NULL || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK)) 1114 continue; 1115 1116 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1117 continue; 1118 1119 tp = sc->sc_tty; 1120 if (tp == NULL) 1121 continue; 1122 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1123 continue; 1124 #endif 1125 tp = sc->sc_tty; 1126 1127 if (sc->sc_rx_ready) { 1128 sc->sc_rx_ready = 0; 1129 sci_rxsoft(sc, tp); 1130 } 1131 1132 #if 0 1133 if (sc->sc_st_check) { 1134 sc->sc_st_check = 0; 1135 sci_stsoft(sc, tp); 1136 } 1137 #endif 1138 1139 if (sc->sc_tx_done) { 1140 sc->sc_tx_done = 0; 1141 sci_txsoft(sc, tp); 1142 } 1143 } 1144 1145 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1146 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1147 splx(s); 1148 #endif 1149 #endif 1150 } 1151 1152 int 1153 sciintr(void *arg) 1154 { 1155 struct sci_softc *sc = arg; 1156 u_char *put, *end; 1157 u_int cc; 1158 u_short ssr; 1159 1160 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1161 return (0); 1162 1163 end = sc->sc_ebuf; 1164 put = sc->sc_rbput; 1165 cc = sc->sc_rbavail; 1166 1167 ssr = SHREG_SCSSR; 1168 if (ISSET(ssr, SCSSR_FER)) { 1169 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_PER | SCSSR_FER); 1170 #if defined(DDB) || defined(KGDB) 1171 #ifdef SH4 1172 if ((SHREG_SCSPTR & SCSPTR_SPB0DT) != 0) { 1173 #else 1174 if ((SHREG_SCSPDR & SCSPDR_SCP0DT) != 0) { 1175 #endif 1176 #ifdef DDB 1177 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 1178 console_debugger(); 1179 } 1180 #endif 1181 #ifdef KGDB 1182 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) { 1183 kgdb_connect(1); 1184 } 1185 #endif 1186 } 1187 #endif /* DDB || KGDB */ 1188 } 1189 if ((SHREG_SCSSR & SCSSR_RDRF) != 0) { 1190 if (cc > 0) { 1191 put[0] = SHREG_SCRDR; 1192 put[1] = SHREG_SCSSR & 0x00ff; 1193 1194 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1195 SCSSR_RDRF); 1196 1197 put += 2; 1198 if (put >= end) 1199 put = sc->sc_rbuf; 1200 cc--; 1201 } 1202 1203 /* 1204 * Current string of incoming characters ended because 1205 * no more data was available or we ran out of space. 1206 * Schedule a receive event if any data was received. 1207 * If we're out of space, turn off receive interrupts. 1208 */ 1209 sc->sc_rbput = put; 1210 sc->sc_rbavail = cc; 1211 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1212 sc->sc_rx_ready = 1; 1213 1214 /* 1215 * See if we are in danger of overflowing a buffer. If 1216 * so, use hardware flow control to ease the pressure. 1217 */ 1218 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1219 cc < sc->sc_r_hiwat) { 1220 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1221 #if 0 1222 sci_hwiflow(sc); 1223 #endif 1224 } 1225 1226 /* 1227 * If we're out of space, disable receive interrupts 1228 * until the queue has drained a bit. 1229 */ 1230 if (!cc) { 1231 SHREG_SCSCR &= ~SCSCR_RIE; 1232 } 1233 } else { 1234 if (SHREG_SCSSR & SCSSR_RDRF) { 1235 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1236 } 1237 } 1238 1239 #if 0 1240 msr = bus_space_read_1(iot, ioh, sci_msr); 1241 delta = msr ^ sc->sc_msr; 1242 sc->sc_msr = msr; 1243 if (ISSET(delta, sc->sc_msr_mask)) { 1244 SET(sc->sc_msr_delta, delta); 1245 1246 /* 1247 * Pulse-per-second clock signal on edge of DCD? 1248 */ 1249 if (ISSET(delta, sc->sc_ppsmask)) { 1250 struct timeval tv; 1251 if (ISSET(msr, sc->sc_ppsmask) == 1252 sc->sc_ppsassert) { 1253 /* XXX nanotime() */ 1254 microtime(&tv); 1255 TIMEVAL_TO_TIMESPEC(&tv, 1256 &sc->ppsinfo.assert_timestamp); 1257 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1258 timespecadd(&sc->ppsinfo.assert_timestamp, 1259 &sc->ppsparam.assert_offset, 1260 &sc->ppsinfo.assert_timestamp); 1261 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1262 } 1263 1264 #ifdef PPS_SYNC 1265 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1266 hardpps(&tv, tv.tv_usec); 1267 #endif 1268 sc->ppsinfo.assert_sequence++; 1269 sc->ppsinfo.current_mode = 1270 sc->ppsparam.mode; 1271 1272 } else if (ISSET(msr, sc->sc_ppsmask) == 1273 sc->sc_ppsclear) { 1274 /* XXX nanotime() */ 1275 microtime(&tv); 1276 TIMEVAL_TO_TIMESPEC(&tv, 1277 &sc->ppsinfo.clear_timestamp); 1278 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1279 timespecadd(&sc->ppsinfo.clear_timestamp, 1280 &sc->ppsparam.clear_offset, 1281 &sc->ppsinfo.clear_timestamp); 1282 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1283 } 1284 1285 #ifdef PPS_SYNC 1286 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1287 hardpps(&tv, tv.tv_usec); 1288 #endif 1289 sc->ppsinfo.clear_sequence++; 1290 sc->ppsinfo.current_mode = 1291 sc->ppsparam.mode; 1292 } 1293 } 1294 1295 /* 1296 * Stop output immediately if we lose the output 1297 * flow control signal or carrier detect. 1298 */ 1299 if (ISSET(~msr, sc->sc_msr_mask)) { 1300 sc->sc_tbc = 0; 1301 sc->sc_heldtbc = 0; 1302 #ifdef SCI_DEBUG 1303 if (sci_debug) 1304 scistatus(sc, "sciintr "); 1305 #endif 1306 } 1307 1308 sc->sc_st_check = 1; 1309 } 1310 #endif 1311 1312 /* 1313 * Done handling any receive interrupts. See if data can be 1314 * transmitted as well. Schedule tx done event if no data left 1315 * and tty was marked busy. 1316 */ 1317 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1318 /* 1319 * If we've delayed a parameter change, do it now, and restart 1320 * output. 1321 */ 1322 if (sc->sc_heldchange) { 1323 sc->sc_heldchange = 0; 1324 sc->sc_tbc = sc->sc_heldtbc; 1325 sc->sc_heldtbc = 0; 1326 } 1327 1328 /* Output the next chunk of the contiguous buffer, if any. */ 1329 if (sc->sc_tbc > 0) { 1330 sci_putc(*(sc->sc_tba)); 1331 sc->sc_tba++; 1332 sc->sc_tbc--; 1333 } else { 1334 /* Disable transmit completion interrupts if necessary. */ 1335 #if 0 1336 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1337 #endif 1338 SHREG_SCSCR &= ~SCSCR_TIE; 1339 1340 if (sc->sc_tx_busy) { 1341 sc->sc_tx_busy = 0; 1342 sc->sc_tx_done = 1; 1343 } 1344 } 1345 } 1346 1347 /* Wake up the poller. */ 1348 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1349 softintr_schedule(sc->sc_si); 1350 #else 1351 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1352 setsoftserial(); 1353 #else 1354 if (!sci_softintr_scheduled) { 1355 sci_softintr_scheduled = 1; 1356 callout_reset(&sci_soft_ch, 1, scisoft, 1); 1357 } 1358 #endif 1359 #endif 1360 1361 #if NRND > 0 && defined(RND_SCI) 1362 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1363 #endif 1364 1365 return (1); 1366 } 1367 1368 void 1369 scicnprobe(cp) 1370 struct consdev *cp; 1371 { 1372 int maj; 1373 1374 /* locate the major number */ 1375 for (maj = 0; maj < nchrdev; maj++) 1376 if (cdevsw[maj].d_open == sciopen) 1377 break; 1378 1379 /* Initialize required fields. */ 1380 cp->cn_dev = makedev(maj, 0); 1381 #ifdef SCICONSOLE 1382 cp->cn_pri = CN_REMOTE; 1383 #else 1384 cp->cn_pri = CN_NORMAL; 1385 #endif 1386 } 1387 1388 void 1389 scicninit(struct consdev *cp) 1390 { 1391 1392 InitializeSci(scicn_speed); 1393 sciisconsole = 1; 1394 } 1395 1396 int 1397 scicngetc(dev_t dev) 1398 { 1399 int c; 1400 int s; 1401 1402 s = splserial(); 1403 c = sci_getc(); 1404 splx(s); 1405 1406 return (c); 1407 } 1408 1409 void 1410 scicnputc(dev_t dev, int c) 1411 { 1412 int s; 1413 1414 s = splserial(); 1415 sci_putc((u_char)c); 1416 splx(s); 1417 } 1418
Indexes created Thu Sep 25 16:09:42 GMT 2025