sci.c revision 1.42
1 /* $NetBSD: sci.c,v 1.42 2006/05/14 21:56:33 elad 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 1.42 2006/05/14 21:56:33 elad 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_proc->p_cred, KAUTH_GENERIC_ISSUSER, &l->l_proc->p_acflag) != 0) 671 return (EBUSY); 672 673 s = spltty(); 674 675 /* 676 * Do the following iff this is a first open. 677 */ 678 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 679 struct termios t; 680 681 tp->t_dev = dev; 682 683 s2 = splserial(); 684 685 /* Turn on interrupts. */ 686 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 687 688 splx(s2); 689 690 /* 691 * Initialize the termios status to the defaults. Add in the 692 * sticky bits from TIOCSFLAGS. 693 */ 694 t.c_ispeed = 0; 695 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 696 t.c_ospeed = scicn_speed; 697 t.c_cflag = sciconscflag; 698 } else { 699 t.c_ospeed = TTYDEF_SPEED; 700 t.c_cflag = TTYDEF_CFLAG; 701 } 702 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 703 SET(t.c_cflag, CLOCAL); 704 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 705 SET(t.c_cflag, CRTSCTS); 706 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 707 SET(t.c_cflag, MDMBUF); 708 /* Make sure sciparam() will do something. */ 709 tp->t_ospeed = 0; 710 (void) sciparam(tp, &t); 711 tp->t_iflag = TTYDEF_IFLAG; 712 tp->t_oflag = TTYDEF_OFLAG; 713 tp->t_lflag = TTYDEF_LFLAG; 714 ttychars(tp); 715 ttsetwater(tp); 716 717 s2 = splserial(); 718 719 /* Clear the input ring, and unblock. */ 720 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 721 sc->sc_rbavail = sci_rbuf_size; 722 sci_iflush(sc); 723 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 724 #if 0 725 /* XXX (msaitoh) */ 726 sci_hwiflow(sc); 727 #endif 728 729 #ifdef SCI_DEBUG 730 if (sci_debug) 731 scistatus(sc, "sciopen "); 732 #endif 733 734 splx(s2); 735 } 736 737 splx(s); 738 739 error = ttyopen(tp, SCIDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 740 if (error) 741 goto bad; 742 743 error = (*tp->t_linesw->l_open)(dev, tp); 744 if (error) 745 goto bad; 746 747 return (0); 748 749 bad: 750 751 return (error); 752 } 753 754 int 755 sciclose(dev_t dev, int flag, int mode, struct lwp *l) 756 { 757 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 758 struct tty *tp = sc->sc_tty; 759 760 /* XXX This is for cons.c. */ 761 if (!ISSET(tp->t_state, TS_ISOPEN)) 762 return (0); 763 764 (*tp->t_linesw->l_close)(tp, flag); 765 ttyclose(tp); 766 767 if (!device_is_active(&sc->sc_dev)) 768 return (0); 769 770 return (0); 771 } 772 773 int 774 sciread(dev_t dev, struct uio *uio, int flag) 775 { 776 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 777 struct tty *tp = sc->sc_tty; 778 779 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 780 } 781 782 int 783 sciwrite(dev_t dev, struct uio *uio, int flag) 784 { 785 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 786 struct tty *tp = sc->sc_tty; 787 788 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 789 } 790 791 int 792 scipoll(dev_t dev, int events, struct lwp *l) 793 { 794 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 795 struct tty *tp = sc->sc_tty; 796 797 return ((*tp->t_linesw->l_poll)(tp, events, l)); 798 } 799 800 struct tty * 801 scitty(dev_t dev) 802 { 803 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 804 struct tty *tp = sc->sc_tty; 805 806 return (tp); 807 } 808 809 int 810 sciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 811 { 812 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 813 struct tty *tp = sc->sc_tty; 814 int error; 815 int s; 816 817 if (!device_is_active(&sc->sc_dev)) 818 return (EIO); 819 820 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 821 if (error != EPASSTHROUGH) 822 return (error); 823 824 error = ttioctl(tp, cmd, data, flag, l); 825 if (error != EPASSTHROUGH) 826 return (error); 827 828 error = 0; 829 830 s = splserial(); 831 832 switch (cmd) { 833 case TIOCSBRK: 834 sci_break(sc, 1); 835 break; 836 837 case TIOCCBRK: 838 sci_break(sc, 0); 839 break; 840 841 case TIOCGFLAGS: 842 *(int *)data = sc->sc_swflags; 843 break; 844 845 case TIOCSFLAGS: 846 error = kauth_authorize_generic(l->l_proc->p_cred, KAUTH_GENERIC_ISSUSER, &l->l_proc->p_acflag); 847 if (error) 848 break; 849 sc->sc_swflags = *(int *)data; 850 break; 851 852 default: 853 error = EPASSTHROUGH; 854 break; 855 } 856 857 splx(s); 858 859 return (error); 860 } 861 862 integrate void 863 sci_schedrx(struct sci_softc *sc) 864 { 865 866 sc->sc_rx_ready = 1; 867 868 /* Wake up the poller. */ 869 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 870 softintr_schedule(sc->sc_si); 871 #else 872 #ifndef __NO_SOFT_SERIAL_INTERRUPT 873 setsoftserial(); 874 #else 875 if (!sci_softintr_scheduled) { 876 sci_softintr_scheduled = 1; 877 callout_reset(&sci_soft_ch, 1, scisoft, NULL); 878 } 879 #endif 880 #endif 881 } 882 883 void 884 sci_break(struct sci_softc *sc, int onoff) 885 { 886 887 if (onoff) 888 SHREG_SCSSR &= ~SCSSR_TDRE; 889 else 890 SHREG_SCSSR |= SCSSR_TDRE; 891 892 #if 0 /* XXX */ 893 if (!sc->sc_heldchange) { 894 if (sc->sc_tx_busy) { 895 sc->sc_heldtbc = sc->sc_tbc; 896 sc->sc_tbc = 0; 897 sc->sc_heldchange = 1; 898 } else 899 sci_loadchannelregs(sc); 900 } 901 #endif 902 } 903 904 /* 905 * Stop output, e.g., for ^S or output flush. 906 */ 907 void 908 scistop(struct tty *tp, int flag) 909 { 910 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 911 int s; 912 913 s = splserial(); 914 if (ISSET(tp->t_state, TS_BUSY)) { 915 /* Stop transmitting at the next chunk. */ 916 sc->sc_tbc = 0; 917 sc->sc_heldtbc = 0; 918 if (!ISSET(tp->t_state, TS_TTSTOP)) 919 SET(tp->t_state, TS_FLUSH); 920 } 921 splx(s); 922 } 923 924 void 925 scidiag(void *arg) 926 { 927 struct sci_softc *sc = arg; 928 int overflows, floods; 929 int s; 930 931 s = splserial(); 932 overflows = sc->sc_overflows; 933 sc->sc_overflows = 0; 934 floods = sc->sc_floods; 935 sc->sc_floods = 0; 936 sc->sc_errors = 0; 937 splx(s); 938 939 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 940 sc->sc_dev.dv_xname, 941 overflows, overflows == 1 ? "" : "s", 942 floods, floods == 1 ? "" : "s"); 943 } 944 945 integrate void 946 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 947 { 948 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 949 u_char *get, *end; 950 u_int cc, scc; 951 u_char ssr; 952 int code; 953 int s; 954 955 end = sc->sc_ebuf; 956 get = sc->sc_rbget; 957 scc = cc = sci_rbuf_size - sc->sc_rbavail; 958 959 if (cc == sci_rbuf_size) { 960 sc->sc_floods++; 961 if (sc->sc_errors++ == 0) 962 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 963 } 964 965 while (cc) { 966 code = get[0]; 967 ssr = get[1]; 968 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 969 if (ISSET(ssr, SCSSR_FER)) 970 SET(code, TTY_FE); 971 if (ISSET(ssr, SCSSR_PER)) 972 SET(code, TTY_PE); 973 } 974 if ((*rint)(code, tp) == -1) { 975 /* 976 * The line discipline's buffer is out of space. 977 */ 978 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 979 /* 980 * We're either not using flow control, or the 981 * line discipline didn't tell us to block for 982 * some reason. Either way, we have no way to 983 * know when there's more space available, so 984 * just drop the rest of the data. 985 */ 986 get += cc << 1; 987 if (get >= end) 988 get -= sci_rbuf_size << 1; 989 cc = 0; 990 } else { 991 /* 992 * Don't schedule any more receive processing 993 * until the line discipline tells us there's 994 * space available (through scihwiflow()). 995 * Leave the rest of the data in the input 996 * buffer. 997 */ 998 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 999 } 1000 break; 1001 } 1002 get += 2; 1003 if (get >= end) 1004 get = sc->sc_rbuf; 1005 cc--; 1006 } 1007 1008 if (cc != scc) { 1009 sc->sc_rbget = get; 1010 s = splserial(); 1011 cc = sc->sc_rbavail += scc - cc; 1012 /* Buffers should be ok again, release possible block. */ 1013 if (cc >= sc->sc_r_lowat) { 1014 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1015 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1016 SHREG_SCSCR |= SCSCR_RIE; 1017 } 1018 #if 0 1019 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1020 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1021 sci_hwiflow(sc); 1022 } 1023 #endif 1024 } 1025 splx(s); 1026 } 1027 } 1028 1029 integrate void 1030 sci_txsoft(sc, tp) 1031 struct sci_softc *sc; 1032 struct tty *tp; 1033 { 1034 1035 CLR(tp->t_state, TS_BUSY); 1036 if (ISSET(tp->t_state, TS_FLUSH)) 1037 CLR(tp->t_state, TS_FLUSH); 1038 else 1039 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1040 (*tp->t_linesw->l_start)(tp); 1041 } 1042 1043 integrate void 1044 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1045 { 1046 #if 0 1047 /* XXX (msaitoh) */ 1048 u_char msr, delta; 1049 int s; 1050 1051 s = splserial(); 1052 msr = sc->sc_msr; 1053 delta = sc->sc_msr_delta; 1054 sc->sc_msr_delta = 0; 1055 splx(s); 1056 1057 if (ISSET(delta, sc->sc_msr_dcd)) { 1058 /* 1059 * Inform the tty layer that carrier detect changed. 1060 */ 1061 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1062 } 1063 1064 if (ISSET(delta, sc->sc_msr_cts)) { 1065 /* Block or unblock output according to flow control. */ 1066 if (ISSET(msr, sc->sc_msr_cts)) { 1067 sc->sc_tx_stopped = 0; 1068 (*tp->t_linesw->l_start)(tp); 1069 } else { 1070 sc->sc_tx_stopped = 1; 1071 } 1072 } 1073 1074 #ifdef SCI_DEBUG 1075 if (sci_debug) 1076 scistatus(sc, "sci_stsoft"); 1077 #endif 1078 #endif 1079 } 1080 1081 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1082 void 1083 scisoft(void *arg) 1084 { 1085 struct sci_softc *sc = arg; 1086 struct tty *tp; 1087 1088 if (!device_is_active(&sc->sc_dev)) 1089 return; 1090 1091 { 1092 #else 1093 void 1094 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1095 scisoft() 1096 #else 1097 scisoft(void *arg) 1098 #endif 1099 { 1100 struct sci_softc *sc; 1101 struct tty *tp; 1102 int unit; 1103 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1104 int s; 1105 1106 s = splsoftserial(); 1107 sci_softintr_scheduled = 0; 1108 #endif 1109 1110 for (unit = 0; unit < sci_cd.cd_ndevs; unit++) { 1111 sc = sci_cd.cd_devs[unit]; 1112 if (sc == NULL || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK)) 1113 continue; 1114 1115 if (!device_is_active(&sc->sc_dev)) 1116 continue; 1117 1118 tp = sc->sc_tty; 1119 if (tp == NULL) 1120 continue; 1121 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1122 continue; 1123 #endif 1124 tp = sc->sc_tty; 1125 1126 if (sc->sc_rx_ready) { 1127 sc->sc_rx_ready = 0; 1128 sci_rxsoft(sc, tp); 1129 } 1130 1131 #if 0 1132 if (sc->sc_st_check) { 1133 sc->sc_st_check = 0; 1134 sci_stsoft(sc, tp); 1135 } 1136 #endif 1137 1138 if (sc->sc_tx_done) { 1139 sc->sc_tx_done = 0; 1140 sci_txsoft(sc, tp); 1141 } 1142 } 1143 1144 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1145 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1146 splx(s); 1147 #endif 1148 #endif 1149 } 1150 1151 int 1152 sciintr(void *arg) 1153 { 1154 struct sci_softc *sc = arg; 1155 u_char *put, *end; 1156 u_int cc; 1157 u_short ssr; 1158 1159 if (!device_is_active(&sc->sc_dev)) 1160 return (0); 1161 1162 end = sc->sc_ebuf; 1163 put = sc->sc_rbput; 1164 cc = sc->sc_rbavail; 1165 1166 do { 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 put += 2; 1195 if (put >= end) 1196 put = sc->sc_rbuf; 1197 cc--; 1198 } 1199 1200 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1201 SCSSR_RDRF); 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 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1232 SHREG_SCSCR &= ~SCSCR_RIE; 1233 } 1234 } else { 1235 if (SHREG_SCSSR & SCSSR_RDRF) { 1236 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1237 delay(10); 1238 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 1239 continue; 1240 } 1241 } 1242 } while (SHREG_SCSSR & SCSSR_RDRF); 1243 1244 #if 0 1245 msr = bus_space_read_1(iot, ioh, sci_msr); 1246 delta = msr ^ sc->sc_msr; 1247 sc->sc_msr = msr; 1248 if (ISSET(delta, sc->sc_msr_mask)) { 1249 SET(sc->sc_msr_delta, delta); 1250 1251 /* 1252 * Pulse-per-second clock signal on edge of DCD? 1253 */ 1254 if (ISSET(delta, sc->sc_ppsmask)) { 1255 struct timeval tv; 1256 if (ISSET(msr, sc->sc_ppsmask) == 1257 sc->sc_ppsassert) { 1258 /* XXX nanotime() */ 1259 microtime(&tv); 1260 TIMEVAL_TO_TIMESPEC(&tv, 1261 &sc->ppsinfo.assert_timestamp); 1262 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1263 timespecadd(&sc->ppsinfo.assert_timestamp, 1264 &sc->ppsparam.assert_offset, 1265 &sc->ppsinfo.assert_timestamp); 1266 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1267 } 1268 1269 #ifdef PPS_SYNC 1270 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1271 hardpps(&tv, tv.tv_usec); 1272 #endif 1273 sc->ppsinfo.assert_sequence++; 1274 sc->ppsinfo.current_mode = 1275 sc->ppsparam.mode; 1276 1277 } else if (ISSET(msr, sc->sc_ppsmask) == 1278 sc->sc_ppsclear) { 1279 /* XXX nanotime() */ 1280 microtime(&tv); 1281 TIMEVAL_TO_TIMESPEC(&tv, 1282 &sc->ppsinfo.clear_timestamp); 1283 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1284 timespecadd(&sc->ppsinfo.clear_timestamp, 1285 &sc->ppsparam.clear_offset, 1286 &sc->ppsinfo.clear_timestamp); 1287 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1288 } 1289 1290 #ifdef PPS_SYNC 1291 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1292 hardpps(&tv, tv.tv_usec); 1293 #endif 1294 sc->ppsinfo.clear_sequence++; 1295 sc->ppsinfo.current_mode = 1296 sc->ppsparam.mode; 1297 } 1298 } 1299 1300 /* 1301 * Stop output immediately if we lose the output 1302 * flow control signal or carrier detect. 1303 */ 1304 if (ISSET(~msr, sc->sc_msr_mask)) { 1305 sc->sc_tbc = 0; 1306 sc->sc_heldtbc = 0; 1307 #ifdef SCI_DEBUG 1308 if (sci_debug) 1309 scistatus(sc, "sciintr "); 1310 #endif 1311 } 1312 1313 sc->sc_st_check = 1; 1314 } 1315 #endif 1316 1317 /* 1318 * Done handling any receive interrupts. See if data can be 1319 * transmitted as well. Schedule tx done event if no data left 1320 * and tty was marked busy. 1321 */ 1322 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1323 /* 1324 * If we've delayed a parameter change, do it now, and restart 1325 * output. 1326 */ 1327 if (sc->sc_heldchange) { 1328 sc->sc_heldchange = 0; 1329 sc->sc_tbc = sc->sc_heldtbc; 1330 sc->sc_heldtbc = 0; 1331 } 1332 1333 /* Output the next chunk of the contiguous buffer, if any. */ 1334 if (sc->sc_tbc > 0) { 1335 sci_putc(*(sc->sc_tba)); 1336 sc->sc_tba++; 1337 sc->sc_tbc--; 1338 } else { 1339 /* Disable transmit completion interrupts if necessary. */ 1340 #if 0 1341 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1342 #endif 1343 SHREG_SCSCR &= ~SCSCR_TIE; 1344 1345 if (sc->sc_tx_busy) { 1346 sc->sc_tx_busy = 0; 1347 sc->sc_tx_done = 1; 1348 } 1349 } 1350 } 1351 1352 /* Wake up the poller. */ 1353 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1354 softintr_schedule(sc->sc_si); 1355 #else 1356 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1357 setsoftserial(); 1358 #else 1359 if (!sci_softintr_scheduled) { 1360 sci_softintr_scheduled = 1; 1361 callout_reset(&sci_soft_ch, 1, scisoft, 1); 1362 } 1363 #endif 1364 #endif 1365 1366 #if NRND > 0 && defined(RND_SCI) 1367 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1368 #endif 1369 1370 return (1); 1371 } 1372 1373 void 1374 scicnprobe(cp) 1375 struct consdev *cp; 1376 { 1377 int maj; 1378 1379 /* locate the major number */ 1380 maj = cdevsw_lookup_major(&sci_cdevsw); 1381 1382 /* Initialize required fields. */ 1383 cp->cn_dev = makedev(maj, 0); 1384 #ifdef SCICONSOLE 1385 cp->cn_pri = CN_REMOTE; 1386 #else 1387 cp->cn_pri = CN_NORMAL; 1388 #endif 1389 } 1390 1391 void 1392 scicninit(struct consdev *cp) 1393 { 1394 1395 InitializeSci(scicn_speed); 1396 sciisconsole = 1; 1397 } 1398 1399 int 1400 scicngetc(dev_t dev) 1401 { 1402 int c; 1403 int s; 1404 1405 s = splserial(); 1406 c = sci_getc(); 1407 splx(s); 1408 1409 return (c); 1410 } 1411 1412 void 1413 scicnputc(dev_t dev, int c) 1414 { 1415 int s; 1416 1417 s = splserial(); 1418 sci_putc((u_char)c); 1419 splx(s); 1420 } 1421
Indexes created Tue Sep 23 14:10:03 GMT 2025