sci.c revision 1.43
1 /* $NetBSD: sci.c,v 1.43 2006/07/23 22:06:06 ad 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. Neither the name of the University nor the names of its contributors 78 * may be used to endorse or promote products derived from this software 79 * without specific prior written permission. 80 * 81 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 82 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 83 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 84 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 85 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 86 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 87 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 88 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 89 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 90 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 91 * SUCH DAMAGE. 92 * 93 * @(#)com.c 7.5 (Berkeley) 5/16/91 94 */ 95 96 /* 97 * SH internal serial driver 98 * 99 * This code is derived from both z8530tty.c and com.c 100 */ 101 102 #include <sys/cdefs.h> 103 __KERNEL_RCSID(0, "$NetBSD: sci.c,v 1.43 2006/07/23 22:06:06 ad Exp $"); 104 105 #include "opt_kgdb.h" 106 #include "opt_sci.h" 107 108 #include <sys/param.h> 109 #include <sys/systm.h> 110 #include <sys/tty.h> 111 #include <sys/proc.h> 112 #include <sys/conf.h> 113 #include <sys/file.h> 114 #include <sys/syslog.h> 115 #include <sys/kernel.h> 116 #include <sys/device.h> 117 #include <sys/malloc.h> 118 #include <sys/kauth.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 /* Hardware flag masks */ 220 #define SCI_HW_NOIEN 0x01 221 #define SCI_HW_FIFO 0x02 222 #define SCI_HW_FLOW 0x08 223 #define SCI_HW_DEV_OK 0x20 224 #define SCI_HW_CONSOLE 0x40 225 #define SCI_HW_KGDB 0x80 226 227 /* Buffer size for character buffer */ 228 #define SCI_RING_SIZE 2048 229 230 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 231 u_int sci_rbuf_hiwat = (SCI_RING_SIZE * 1) / 4; 232 u_int sci_rbuf_lowat = (SCI_RING_SIZE * 3) / 4; 233 234 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 235 int sciconscflag = CONMODE; 236 int sciisconsole = 0; 237 238 #ifdef SCICN_SPEED 239 int scicn_speed = SCICN_SPEED; 240 #else 241 int scicn_speed = 9600; 242 #endif 243 244 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 245 246 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 247 #ifdef __NO_SOFT_SERIAL_INTERRUPT 248 volatile int sci_softintr_scheduled; 249 struct callout sci_soft_ch = CALLOUT_INITIALIZER; 250 #endif 251 #endif 252 253 u_int sci_rbuf_size = SCI_RING_SIZE; 254 255 CFATTACH_DECL(sci, sizeof(struct sci_softc), 256 sci_match, sci_attach, NULL, NULL); 257 258 extern struct cfdriver sci_cd; 259 260 static int sci_attached; 261 262 dev_type_open(sciopen); 263 dev_type_close(sciclose); 264 dev_type_read(sciread); 265 dev_type_write(sciwrite); 266 dev_type_ioctl(sciioctl); 267 dev_type_stop(scistop); 268 dev_type_tty(scitty); 269 dev_type_poll(scipoll); 270 271 const struct cdevsw sci_cdevsw = { 272 sciopen, sciclose, sciread, sciwrite, sciioctl, 273 scistop, scitty, scipoll, nommap, ttykqfilter, D_TTY 274 }; 275 276 void InitializeSci (unsigned int); 277 278 /* 279 * following functions are debugging prupose only 280 */ 281 #define CR 0x0D 282 #define I2C_ADRS (*(volatile unsigned int *)0xa8000000) 283 #define USART_ON (unsigned int)~0x08 284 285 void sci_putc(unsigned char); 286 unsigned char sci_getc(void); 287 int SciErrCheck(void); 288 289 /* 290 * InitializeSci 291 * : unsigned int bps; 292 * : SCI(Serial Communication Interface) 293 */ 294 295 void 296 InitializeSci(unsigned int bps) 297 { 298 299 /* Initialize SCR */ 300 SHREG_SCSCR = 0x00; 301 302 /* Serial Mode Register */ 303 SHREG_SCSMR = 0x00; /* Async,8bit,NonParity,Even,1Stop,NoMulti */ 304 305 /* Bit Rate Register */ 306 SHREG_SCBRR = divrnd(sh_clock_get_pclock(), 32 * bps) - 1; 307 308 /* 309 * wait 1mSec, because Send/Recv must begin 1 bit period after 310 * BRR is set. 311 */ 312 delay(1000); 313 314 /* Send permission, Receive permission ON */ 315 SHREG_SCSCR = SCSCR_TE | SCSCR_RE; 316 317 /* Serial Status Register */ 318 SHREG_SCSSR &= SCSSR_TDRE; /* Clear Status */ 319 320 #if 0 321 I2C_ADRS &= ~0x08; /* enable RS-232C */ 322 #endif 323 } 324 325 326 /* 327 * sci_putc 328 * : unsigned char c; 329 */ 330 void 331 sci_putc(unsigned char c) 332 { 333 334 /* wait for ready */ 335 while ((SHREG_SCSSR & SCSSR_TDRE) == 0) 336 ; 337 338 /* write send data to send register */ 339 SHREG_SCTDR = c; 340 341 /* clear ready flag */ 342 SHREG_SCSSR &= ~SCSSR_TDRE; 343 } 344 345 /* 346 * : SciErrCheck 347 * 0x20 = over run 348 * 0x10 = frame error 349 * 0x80 = parity error 350 */ 351 int 352 SciErrCheck(void) 353 { 354 355 return(SHREG_SCSSR & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)); 356 } 357 358 /* 359 * sci_getc 360 */ 361 unsigned char 362 sci_getc(void) 363 { 364 unsigned char c, err_c; 365 366 while (((err_c = SHREG_SCSSR) 367 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) == 0) 368 ; 369 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 370 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 371 return(err_c |= 0x80); 372 } 373 374 c = SHREG_SCRDR; 375 376 SHREG_SCSSR &= ~SCSSR_RDRF; 377 378 return(c); 379 } 380 381 static int 382 sci_match(struct device *parent, struct cfdata *cfp, void *aux) 383 { 384 385 if (strcmp(cfp->cf_name, "sci") || sci_attached) 386 return 0; 387 388 return 1; 389 } 390 391 static void 392 sci_attach(struct device *parent, struct device *self, void *aux) 393 { 394 struct sci_softc *sc = (struct sci_softc *)self; 395 struct tty *tp; 396 397 sci_attached = 1; 398 399 sc->sc_hwflags = 0; /* XXX */ 400 sc->sc_swflags = 0; /* XXX */ 401 sc->sc_fifolen = 0; /* XXX */ 402 403 if (sciisconsole) { 404 SET(sc->sc_hwflags, SCI_HW_CONSOLE); 405 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 406 printf("\n%s: console\n", sc->sc_dev.dv_xname); 407 } else { 408 InitializeSci(9600); 409 printf("\n"); 410 } 411 412 callout_init(&sc->sc_diag_ch); 413 414 intc_intr_establish(SH_INTEVT_SCI_ERI, IST_LEVEL, IPL_SERIAL, sciintr, 415 sc); 416 intc_intr_establish(SH_INTEVT_SCI_RXI, IST_LEVEL, IPL_SERIAL, sciintr, 417 sc); 418 intc_intr_establish(SH_INTEVT_SCI_TXI, IST_LEVEL, IPL_SERIAL, sciintr, 419 sc); 420 intc_intr_establish(SH_INTEVT_SCI_TEI, IST_LEVEL, IPL_SERIAL, sciintr, 421 sc); 422 423 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 424 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, scisoft, sc); 425 #endif 426 SET(sc->sc_hwflags, SCI_HW_DEV_OK); 427 428 tp = ttymalloc(); 429 tp->t_oproc = scistart; 430 tp->t_param = sciparam; 431 tp->t_hwiflow = NULL; 432 433 sc->sc_tty = tp; 434 sc->sc_rbuf = malloc(sci_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 435 if (sc->sc_rbuf == NULL) { 436 printf("%s: unable to allocate ring buffer\n", 437 sc->sc_dev.dv_xname); 438 return; 439 } 440 sc->sc_ebuf = sc->sc_rbuf + (sci_rbuf_size << 1); 441 442 tty_attach(tp); 443 } 444 445 /* 446 * Start or restart transmission. 447 */ 448 static void 449 scistart(struct tty *tp) 450 { 451 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 452 int s; 453 454 s = spltty(); 455 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 456 goto out; 457 if (sc->sc_tx_stopped) 458 goto out; 459 460 if (tp->t_outq.c_cc <= tp->t_lowat) { 461 if (ISSET(tp->t_state, TS_ASLEEP)) { 462 CLR(tp->t_state, TS_ASLEEP); 463 wakeup(&tp->t_outq); 464 } 465 selwakeup(&tp->t_wsel); 466 if (tp->t_outq.c_cc == 0) 467 goto out; 468 } 469 470 /* Grab the first contiguous region of buffer space. */ 471 { 472 u_char *tba; 473 int tbc; 474 475 tba = tp->t_outq.c_cf; 476 tbc = ndqb(&tp->t_outq, 0); 477 478 (void)splserial(); 479 480 sc->sc_tba = tba; 481 sc->sc_tbc = tbc; 482 } 483 484 SET(tp->t_state, TS_BUSY); 485 sc->sc_tx_busy = 1; 486 487 /* Enable transmit completion interrupts if necessary. */ 488 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 489 490 /* Output the first byte of the contiguous buffer. */ 491 { 492 if (sc->sc_tbc > 0) { 493 sci_putc(*(sc->sc_tba)); 494 sc->sc_tba++; 495 sc->sc_tbc--; 496 } 497 } 498 out: 499 splx(s); 500 return; 501 } 502 503 /* 504 * Set SCI tty parameters from termios. 505 * XXX - Should just copy the whole termios after 506 * making sure all the changes could be done. 507 */ 508 static int 509 sciparam(struct tty *tp, struct termios *t) 510 { 511 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 512 int ospeed = t->c_ospeed; 513 int s; 514 515 if (!device_is_active(&sc->sc_dev)) 516 return (EIO); 517 518 /* Check requested parameters. */ 519 if (ospeed < 0) 520 return (EINVAL); 521 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 522 return (EINVAL); 523 524 /* 525 * For the console, always force CLOCAL and !HUPCL, so that the port 526 * is always active. 527 */ 528 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 529 ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 530 SET(t->c_cflag, CLOCAL); 531 CLR(t->c_cflag, HUPCL); 532 } 533 534 /* 535 * If there were no changes, don't do anything. This avoids dropping 536 * input and improves performance when all we did was frob things like 537 * VMIN and VTIME. 538 */ 539 if (tp->t_ospeed == t->c_ospeed && 540 tp->t_cflag == t->c_cflag) 541 return (0); 542 543 #if 0 544 /* XXX (msaitoh) */ 545 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 546 #endif 547 548 s = splserial(); 549 550 /* 551 * Set the FIFO threshold based on the receive speed. 552 * 553 * * If it's a low speed, it's probably a mouse or some other 554 * interactive device, so set the threshold low. 555 * * If it's a high speed, trim the trigger level down to prevent 556 * overflows. 557 * * Otherwise set it a bit higher. 558 */ 559 #if 0 560 /* XXX (msaitoh) */ 561 if (ISSET(sc->sc_hwflags, SCI_HW_HAYESP)) 562 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 563 else if (ISSET(sc->sc_hwflags, SCI_HW_FIFO)) 564 sc->sc_fifo = FIFO_ENABLE | 565 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 566 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 567 else 568 sc->sc_fifo = 0; 569 #endif 570 571 /* And copy to tty. */ 572 tp->t_ispeed = 0; 573 tp->t_ospeed = t->c_ospeed; 574 tp->t_cflag = t->c_cflag; 575 576 if (!sc->sc_heldchange) { 577 if (sc->sc_tx_busy) { 578 sc->sc_heldtbc = sc->sc_tbc; 579 sc->sc_tbc = 0; 580 sc->sc_heldchange = 1; 581 } 582 #if 0 583 /* XXX (msaitoh) */ 584 else 585 sci_loadchannelregs(sc); 586 #endif 587 } 588 589 if (!ISSET(t->c_cflag, CHWFLOW)) { 590 /* Disable the high water mark. */ 591 sc->sc_r_hiwat = 0; 592 sc->sc_r_lowat = 0; 593 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 594 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 595 sci_schedrx(sc); 596 } 597 } else { 598 sc->sc_r_hiwat = sci_rbuf_hiwat; 599 sc->sc_r_lowat = sci_rbuf_lowat; 600 } 601 602 splx(s); 603 604 #ifdef SCI_DEBUG 605 if (sci_debug) 606 scistatus(sc, "sciparam "); 607 #endif 608 609 if (!ISSET(t->c_cflag, CHWFLOW)) { 610 if (sc->sc_tx_stopped) { 611 sc->sc_tx_stopped = 0; 612 scistart(tp); 613 } 614 } 615 616 return (0); 617 } 618 619 void 620 sci_iflush(struct sci_softc *sc) 621 { 622 unsigned char err_c; 623 volatile unsigned char c; 624 625 if (((err_c = SHREG_SCSSR) 626 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 627 628 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 629 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 630 return; 631 } 632 633 c = SHREG_SCRDR; 634 635 SHREG_SCSSR &= ~SCSSR_RDRF; 636 } 637 } 638 639 int 640 sciopen(dev_t dev, int flag, int mode, struct lwp *l) 641 { 642 int unit = SCIUNIT(dev); 643 struct sci_softc *sc; 644 struct tty *tp; 645 int s, s2; 646 int error; 647 648 if (unit >= sci_cd.cd_ndevs) 649 return (ENXIO); 650 sc = sci_cd.cd_devs[unit]; 651 if (sc == 0 || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK) || 652 sc->sc_rbuf == NULL) 653 return (ENXIO); 654 655 if (!device_is_active(&sc->sc_dev)) 656 return (ENXIO); 657 658 #ifdef KGDB 659 /* 660 * If this is the kgdb port, no other use is permitted. 661 */ 662 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) 663 return (EBUSY); 664 #endif 665 666 tp = sc->sc_tty; 667 668 if (ISSET(tp->t_state, TS_ISOPEN) && 669 ISSET(tp->t_state, TS_XCLUDE) && 670 kauth_authorize_generic(l->l_cred, 671 KAUTH_GENERIC_ISSUSER, &l->l_acflag) != 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 lwp *l) 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 (!device_is_active(&sc->sc_dev)) 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 lwp *l) 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, l)); 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 lwp *l) 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 (!device_is_active(&sc->sc_dev)) 819 return (EIO); 820 821 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 822 if (error != EPASSTHROUGH) 823 return (error); 824 825 error = ttioctl(tp, cmd, data, flag, l); 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 = kauth_authorize_generic(l->l_cred, 848 KAUTH_GENERIC_ISSUSER, &l->l_acflag); 849 if (error) 850 break; 851 sc->sc_swflags = *(int *)data; 852 break; 853 854 default: 855 error = EPASSTHROUGH; 856 break; 857 } 858 859 splx(s); 860 861 return (error); 862 } 863 864 integrate void 865 sci_schedrx(struct sci_softc *sc) 866 { 867 868 sc->sc_rx_ready = 1; 869 870 /* Wake up the poller. */ 871 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 872 softintr_schedule(sc->sc_si); 873 #else 874 #ifndef __NO_SOFT_SERIAL_INTERRUPT 875 setsoftserial(); 876 #else 877 if (!sci_softintr_scheduled) { 878 sci_softintr_scheduled = 1; 879 callout_reset(&sci_soft_ch, 1, scisoft, NULL); 880 } 881 #endif 882 #endif 883 } 884 885 void 886 sci_break(struct sci_softc *sc, int onoff) 887 { 888 889 if (onoff) 890 SHREG_SCSSR &= ~SCSSR_TDRE; 891 else 892 SHREG_SCSSR |= SCSSR_TDRE; 893 894 #if 0 /* XXX */ 895 if (!sc->sc_heldchange) { 896 if (sc->sc_tx_busy) { 897 sc->sc_heldtbc = sc->sc_tbc; 898 sc->sc_tbc = 0; 899 sc->sc_heldchange = 1; 900 } else 901 sci_loadchannelregs(sc); 902 } 903 #endif 904 } 905 906 /* 907 * Stop output, e.g., for ^S or output flush. 908 */ 909 void 910 scistop(struct tty *tp, int flag) 911 { 912 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 913 int s; 914 915 s = splserial(); 916 if (ISSET(tp->t_state, TS_BUSY)) { 917 /* Stop transmitting at the next chunk. */ 918 sc->sc_tbc = 0; 919 sc->sc_heldtbc = 0; 920 if (!ISSET(tp->t_state, TS_TTSTOP)) 921 SET(tp->t_state, TS_FLUSH); 922 } 923 splx(s); 924 } 925 926 void 927 scidiag(void *arg) 928 { 929 struct sci_softc *sc = arg; 930 int overflows, floods; 931 int s; 932 933 s = splserial(); 934 overflows = sc->sc_overflows; 935 sc->sc_overflows = 0; 936 floods = sc->sc_floods; 937 sc->sc_floods = 0; 938 sc->sc_errors = 0; 939 splx(s); 940 941 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 942 sc->sc_dev.dv_xname, 943 overflows, overflows == 1 ? "" : "s", 944 floods, floods == 1 ? "" : "s"); 945 } 946 947 integrate void 948 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 949 { 950 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 951 u_char *get, *end; 952 u_int cc, scc; 953 u_char ssr; 954 int code; 955 int s; 956 957 end = sc->sc_ebuf; 958 get = sc->sc_rbget; 959 scc = cc = sci_rbuf_size - sc->sc_rbavail; 960 961 if (cc == sci_rbuf_size) { 962 sc->sc_floods++; 963 if (sc->sc_errors++ == 0) 964 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 965 } 966 967 while (cc) { 968 code = get[0]; 969 ssr = get[1]; 970 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 971 if (ISSET(ssr, SCSSR_FER)) 972 SET(code, TTY_FE); 973 if (ISSET(ssr, SCSSR_PER)) 974 SET(code, TTY_PE); 975 } 976 if ((*rint)(code, tp) == -1) { 977 /* 978 * The line discipline's buffer is out of space. 979 */ 980 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 981 /* 982 * We're either not using flow control, or the 983 * line discipline didn't tell us to block for 984 * some reason. Either way, we have no way to 985 * know when there's more space available, so 986 * just drop the rest of the data. 987 */ 988 get += cc << 1; 989 if (get >= end) 990 get -= sci_rbuf_size << 1; 991 cc = 0; 992 } else { 993 /* 994 * Don't schedule any more receive processing 995 * until the line discipline tells us there's 996 * space available (through scihwiflow()). 997 * Leave the rest of the data in the input 998 * buffer. 999 */ 1000 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1001 } 1002 break; 1003 } 1004 get += 2; 1005 if (get >= end) 1006 get = sc->sc_rbuf; 1007 cc--; 1008 } 1009 1010 if (cc != scc) { 1011 sc->sc_rbget = get; 1012 s = splserial(); 1013 cc = sc->sc_rbavail += scc - cc; 1014 /* Buffers should be ok again, release possible block. */ 1015 if (cc >= sc->sc_r_lowat) { 1016 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1017 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1018 SHREG_SCSCR |= SCSCR_RIE; 1019 } 1020 #if 0 1021 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1022 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1023 sci_hwiflow(sc); 1024 } 1025 #endif 1026 } 1027 splx(s); 1028 } 1029 } 1030 1031 integrate void 1032 sci_txsoft(sc, tp) 1033 struct sci_softc *sc; 1034 struct tty *tp; 1035 { 1036 1037 CLR(tp->t_state, TS_BUSY); 1038 if (ISSET(tp->t_state, TS_FLUSH)) 1039 CLR(tp->t_state, TS_FLUSH); 1040 else 1041 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1042 (*tp->t_linesw->l_start)(tp); 1043 } 1044 1045 integrate void 1046 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1047 { 1048 #if 0 1049 /* XXX (msaitoh) */ 1050 u_char msr, delta; 1051 int s; 1052 1053 s = splserial(); 1054 msr = sc->sc_msr; 1055 delta = sc->sc_msr_delta; 1056 sc->sc_msr_delta = 0; 1057 splx(s); 1058 1059 if (ISSET(delta, sc->sc_msr_dcd)) { 1060 /* 1061 * Inform the tty layer that carrier detect changed. 1062 */ 1063 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1064 } 1065 1066 if (ISSET(delta, sc->sc_msr_cts)) { 1067 /* Block or unblock output according to flow control. */ 1068 if (ISSET(msr, sc->sc_msr_cts)) { 1069 sc->sc_tx_stopped = 0; 1070 (*tp->t_linesw->l_start)(tp); 1071 } else { 1072 sc->sc_tx_stopped = 1; 1073 } 1074 } 1075 1076 #ifdef SCI_DEBUG 1077 if (sci_debug) 1078 scistatus(sc, "sci_stsoft"); 1079 #endif 1080 #endif 1081 } 1082 1083 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1084 void 1085 scisoft(void *arg) 1086 { 1087 struct sci_softc *sc = arg; 1088 struct tty *tp; 1089 1090 if (!device_is_active(&sc->sc_dev)) 1091 return; 1092 1093 { 1094 #else 1095 void 1096 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1097 scisoft() 1098 #else 1099 scisoft(void *arg) 1100 #endif 1101 { 1102 struct sci_softc *sc; 1103 struct tty *tp; 1104 int unit; 1105 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1106 int s; 1107 1108 s = splsoftserial(); 1109 sci_softintr_scheduled = 0; 1110 #endif 1111 1112 for (unit = 0; unit < sci_cd.cd_ndevs; unit++) { 1113 sc = sci_cd.cd_devs[unit]; 1114 if (sc == NULL || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK)) 1115 continue; 1116 1117 if (!device_is_active(&sc->sc_dev)) 1118 continue; 1119 1120 tp = sc->sc_tty; 1121 if (tp == NULL) 1122 continue; 1123 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1124 continue; 1125 #endif 1126 tp = sc->sc_tty; 1127 1128 if (sc->sc_rx_ready) { 1129 sc->sc_rx_ready = 0; 1130 sci_rxsoft(sc, tp); 1131 } 1132 1133 #if 0 1134 if (sc->sc_st_check) { 1135 sc->sc_st_check = 0; 1136 sci_stsoft(sc, tp); 1137 } 1138 #endif 1139 1140 if (sc->sc_tx_done) { 1141 sc->sc_tx_done = 0; 1142 sci_txsoft(sc, tp); 1143 } 1144 } 1145 1146 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1147 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1148 splx(s); 1149 #endif 1150 #endif 1151 } 1152 1153 int 1154 sciintr(void *arg) 1155 { 1156 struct sci_softc *sc = arg; 1157 u_char *put, *end; 1158 u_int cc; 1159 u_short ssr; 1160 1161 if (!device_is_active(&sc->sc_dev)) 1162 return (0); 1163 1164 end = sc->sc_ebuf; 1165 put = sc->sc_rbput; 1166 cc = sc->sc_rbavail; 1167 1168 do { 1169 ssr = SHREG_SCSSR; 1170 if (ISSET(ssr, SCSSR_FER)) { 1171 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_PER | SCSSR_FER); 1172 #if defined(DDB) || defined(KGDB) 1173 #ifdef SH4 1174 if ((SHREG_SCSPTR & SCSPTR_SPB0DT) != 0) { 1175 #else 1176 if ((SHREG_SCSPDR & SCSPDR_SCP0DT) != 0) { 1177 #endif 1178 #ifdef DDB 1179 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 1180 console_debugger(); 1181 } 1182 #endif 1183 #ifdef KGDB 1184 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) { 1185 kgdb_connect(1); 1186 } 1187 #endif 1188 } 1189 #endif /* DDB || KGDB */ 1190 } 1191 if ((SHREG_SCSSR & SCSSR_RDRF) != 0) { 1192 if (cc > 0) { 1193 put[0] = SHREG_SCRDR; 1194 put[1] = SHREG_SCSSR & 0x00ff; 1195 1196 put += 2; 1197 if (put >= end) 1198 put = sc->sc_rbuf; 1199 cc--; 1200 } 1201 1202 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1203 SCSSR_RDRF); 1204 1205 /* 1206 * Current string of incoming characters ended because 1207 * no more data was available or we ran out of space. 1208 * Schedule a receive event if any data was received. 1209 * If we're out of space, turn off receive interrupts. 1210 */ 1211 sc->sc_rbput = put; 1212 sc->sc_rbavail = cc; 1213 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1214 sc->sc_rx_ready = 1; 1215 1216 /* 1217 * See if we are in danger of overflowing a buffer. If 1218 * so, use hardware flow control to ease the pressure. 1219 */ 1220 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1221 cc < sc->sc_r_hiwat) { 1222 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1223 #if 0 1224 sci_hwiflow(sc); 1225 #endif 1226 } 1227 1228 /* 1229 * If we're out of space, disable receive interrupts 1230 * until the queue has drained a bit. 1231 */ 1232 if (!cc) { 1233 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1234 SHREG_SCSCR &= ~SCSCR_RIE; 1235 } 1236 } else { 1237 if (SHREG_SCSSR & SCSSR_RDRF) { 1238 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1239 delay(10); 1240 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 1241 continue; 1242 } 1243 } 1244 } while (SHREG_SCSSR & SCSSR_RDRF); 1245 1246 #if 0 1247 msr = bus_space_read_1(iot, ioh, sci_msr); 1248 delta = msr ^ sc->sc_msr; 1249 sc->sc_msr = msr; 1250 if (ISSET(delta, sc->sc_msr_mask)) { 1251 SET(sc->sc_msr_delta, delta); 1252 1253 /* 1254 * Pulse-per-second clock signal on edge of DCD? 1255 */ 1256 if (ISSET(delta, sc->sc_ppsmask)) { 1257 struct timeval tv; 1258 if (ISSET(msr, sc->sc_ppsmask) == 1259 sc->sc_ppsassert) { 1260 /* XXX nanotime() */ 1261 microtime(&tv); 1262 TIMEVAL_TO_TIMESPEC(&tv, 1263 &sc->ppsinfo.assert_timestamp); 1264 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1265 timespecadd(&sc->ppsinfo.assert_timestamp, 1266 &sc->ppsparam.assert_offset, 1267 &sc->ppsinfo.assert_timestamp); 1268 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1269 } 1270 1271 #ifdef PPS_SYNC 1272 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1273 hardpps(&tv, tv.tv_usec); 1274 #endif 1275 sc->ppsinfo.assert_sequence++; 1276 sc->ppsinfo.current_mode = 1277 sc->ppsparam.mode; 1278 1279 } else if (ISSET(msr, sc->sc_ppsmask) == 1280 sc->sc_ppsclear) { 1281 /* XXX nanotime() */ 1282 microtime(&tv); 1283 TIMEVAL_TO_TIMESPEC(&tv, 1284 &sc->ppsinfo.clear_timestamp); 1285 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1286 timespecadd(&sc->ppsinfo.clear_timestamp, 1287 &sc->ppsparam.clear_offset, 1288 &sc->ppsinfo.clear_timestamp); 1289 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1290 } 1291 1292 #ifdef PPS_SYNC 1293 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1294 hardpps(&tv, tv.tv_usec); 1295 #endif 1296 sc->ppsinfo.clear_sequence++; 1297 sc->ppsinfo.current_mode = 1298 sc->ppsparam.mode; 1299 } 1300 } 1301 1302 /* 1303 * Stop output immediately if we lose the output 1304 * flow control signal or carrier detect. 1305 */ 1306 if (ISSET(~msr, sc->sc_msr_mask)) { 1307 sc->sc_tbc = 0; 1308 sc->sc_heldtbc = 0; 1309 #ifdef SCI_DEBUG 1310 if (sci_debug) 1311 scistatus(sc, "sciintr "); 1312 #endif 1313 } 1314 1315 sc->sc_st_check = 1; 1316 } 1317 #endif 1318 1319 /* 1320 * Done handling any receive interrupts. See if data can be 1321 * transmitted as well. Schedule tx done event if no data left 1322 * and tty was marked busy. 1323 */ 1324 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1325 /* 1326 * If we've delayed a parameter change, do it now, and restart 1327 * output. 1328 */ 1329 if (sc->sc_heldchange) { 1330 sc->sc_heldchange = 0; 1331 sc->sc_tbc = sc->sc_heldtbc; 1332 sc->sc_heldtbc = 0; 1333 } 1334 1335 /* Output the next chunk of the contiguous buffer, if any. */ 1336 if (sc->sc_tbc > 0) { 1337 sci_putc(*(sc->sc_tba)); 1338 sc->sc_tba++; 1339 sc->sc_tbc--; 1340 } else { 1341 /* Disable transmit completion interrupts if necessary. */ 1342 #if 0 1343 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1344 #endif 1345 SHREG_SCSCR &= ~SCSCR_TIE; 1346 1347 if (sc->sc_tx_busy) { 1348 sc->sc_tx_busy = 0; 1349 sc->sc_tx_done = 1; 1350 } 1351 } 1352 } 1353 1354 /* Wake up the poller. */ 1355 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1356 softintr_schedule(sc->sc_si); 1357 #else 1358 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1359 setsoftserial(); 1360 #else 1361 if (!sci_softintr_scheduled) { 1362 sci_softintr_scheduled = 1; 1363 callout_reset(&sci_soft_ch, 1, scisoft, 1); 1364 } 1365 #endif 1366 #endif 1367 1368 #if NRND > 0 && defined(RND_SCI) 1369 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1370 #endif 1371 1372 return (1); 1373 } 1374 1375 void 1376 scicnprobe(cp) 1377 struct consdev *cp; 1378 { 1379 int maj; 1380 1381 /* locate the major number */ 1382 maj = cdevsw_lookup_major(&sci_cdevsw); 1383 1384 /* Initialize required fields. */ 1385 cp->cn_dev = makedev(maj, 0); 1386 #ifdef SCICONSOLE 1387 cp->cn_pri = CN_REMOTE; 1388 #else 1389 cp->cn_pri = CN_NORMAL; 1390 #endif 1391 } 1392 1393 void 1394 scicninit(struct consdev *cp) 1395 { 1396 1397 InitializeSci(scicn_speed); 1398 sciisconsole = 1; 1399 } 1400 1401 int 1402 scicngetc(dev_t dev) 1403 { 1404 int c; 1405 int s; 1406 1407 s = splserial(); 1408 c = sci_getc(); 1409 splx(s); 1410 1411 return (c); 1412 } 1413 1414 void 1415 scicnputc(dev_t dev, int c) 1416 { 1417 int s; 1418 1419 s = splserial(); 1420 sci_putc((u_char)c); 1421 splx(s); 1422 } 1423
Indexes created Tue Sep 23 07:09:52 GMT 2025