sci.c revision 1.40
1 /* $NetBSD: sci.c,v 1.40 2006/02/20 16:50:36 thorpej 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 1.40 2006/02/20 16:50:36 thorpej 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> 118 119 #include <dev/cons.h> 120 121 #include <sh3/clock.h> 122 #include <sh3/scireg.h> 123 #include <sh3/pfcreg.h> 124 #include <sh3/tmureg.h> 125 #include <sh3/exception.h> 126 #include <machine/intr.h> 127 128 static void scistart(struct tty *); 129 static int sciparam(struct tty *, struct termios *); 130 131 void scicnprobe(struct consdev *); 132 void scicninit(struct consdev *); 133 void scicnputc(dev_t, int); 134 int scicngetc(dev_t); 135 void scicnpoolc(dev_t, int); 136 int sciintr(void *); 137 138 struct sci_softc { 139 struct device sc_dev; /* boilerplate */ 140 struct tty *sc_tty; 141 void *sc_si; 142 struct callout sc_diag_ch; 143 144 #if 0 145 bus_space_tag_t sc_iot; /* ISA i/o space identifier */ 146 bus_space_handle_t sc_ioh; /* ISA io handle */ 147 148 int sc_drq; 149 150 int sc_frequency; 151 #endif 152 153 u_int sc_overflows, 154 sc_floods, 155 sc_errors; /* number of retries so far */ 156 u_char sc_status[7]; /* copy of registers */ 157 158 int sc_hwflags; 159 int sc_swflags; 160 u_int sc_fifolen; /* XXX always 0? */ 161 162 u_int sc_r_hiwat, 163 sc_r_lowat; 164 u_char *volatile sc_rbget, 165 *volatile sc_rbput; 166 volatile u_int sc_rbavail; 167 u_char *sc_rbuf, 168 *sc_ebuf; 169 170 u_char *sc_tba; /* transmit buffer address */ 171 u_int sc_tbc, /* transmit byte count */ 172 sc_heldtbc; 173 174 volatile u_char sc_rx_flags, /* receiver blocked */ 175 #define RX_TTY_BLOCKED 0x01 176 #define RX_TTY_OVERFLOWED 0x02 177 #define RX_IBUF_BLOCKED 0x04 178 #define RX_IBUF_OVERFLOWED 0x08 179 #define RX_ANY_BLOCK 0x0f 180 sc_tx_busy, /* working on an output chunk */ 181 sc_tx_done, /* done with one output chunk */ 182 sc_tx_stopped, /* H/W level stop (lost CTS) */ 183 sc_st_check, /* got a status interrupt */ 184 sc_rx_ready; 185 186 volatile u_char sc_heldchange; 187 }; 188 189 /* controller driver configuration */ 190 static int sci_match(struct device *, struct cfdata *, void *); 191 static void sci_attach(struct device *, struct device *, void *); 192 193 void sci_break(struct sci_softc *, int); 194 void sci_iflush(struct sci_softc *); 195 196 #define integrate static inline 197 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 198 void scisoft(void *); 199 #else 200 #ifndef __NO_SOFT_SERIAL_INTERRUPT 201 void scisoft(void); 202 #else 203 void scisoft(void *); 204 #endif 205 #endif 206 integrate void sci_rxsoft(struct sci_softc *, struct tty *); 207 integrate void sci_txsoft(struct sci_softc *, struct tty *); 208 integrate void sci_stsoft(struct sci_softc *, struct tty *); 209 integrate void sci_schedrx(struct sci_softc *); 210 void scidiag(void *); 211 212 #define SCIUNIT_MASK 0x7ffff 213 #define SCIDIALOUT_MASK 0x80000 214 215 #define SCIUNIT(x) (minor(x) & SCIUNIT_MASK) 216 #define SCIDIALOUT(x) (minor(x) & SCIDIALOUT_MASK) 217 218 /* Macros to clear/set/test flags. */ 219 #define SET(t, f) (t) |= (f) 220 #define CLR(t, f) (t) &= ~(f) 221 #define ISSET(t, f) ((t) & (f)) 222 223 /* Hardware flag masks */ 224 #define SCI_HW_NOIEN 0x01 225 #define SCI_HW_FIFO 0x02 226 #define SCI_HW_FLOW 0x08 227 #define SCI_HW_DEV_OK 0x20 228 #define SCI_HW_CONSOLE 0x40 229 #define SCI_HW_KGDB 0x80 230 231 /* Buffer size for character buffer */ 232 #define SCI_RING_SIZE 2048 233 234 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 235 u_int sci_rbuf_hiwat = (SCI_RING_SIZE * 1) / 4; 236 u_int sci_rbuf_lowat = (SCI_RING_SIZE * 3) / 4; 237 238 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 239 int sciconscflag = CONMODE; 240 int sciisconsole = 0; 241 242 #ifdef SCICN_SPEED 243 int scicn_speed = SCICN_SPEED; 244 #else 245 int scicn_speed = 9600; 246 #endif 247 248 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 249 250 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 251 #ifdef __NO_SOFT_SERIAL_INTERRUPT 252 volatile int sci_softintr_scheduled; 253 struct callout sci_soft_ch = CALLOUT_INITIALIZER; 254 #endif 255 #endif 256 257 u_int sci_rbuf_size = SCI_RING_SIZE; 258 259 CFATTACH_DECL(sci, sizeof(struct sci_softc), 260 sci_match, sci_attach, NULL, NULL); 261 262 extern struct cfdriver sci_cd; 263 264 static int sci_attached; 265 266 dev_type_open(sciopen); 267 dev_type_close(sciclose); 268 dev_type_read(sciread); 269 dev_type_write(sciwrite); 270 dev_type_ioctl(sciioctl); 271 dev_type_stop(scistop); 272 dev_type_tty(scitty); 273 dev_type_poll(scipoll); 274 275 const struct cdevsw sci_cdevsw = { 276 sciopen, sciclose, sciread, sciwrite, sciioctl, 277 scistop, scitty, scipoll, nommap, ttykqfilter, D_TTY 278 }; 279 280 void InitializeSci (unsigned int); 281 282 /* 283 * following functions are debugging prupose only 284 */ 285 #define CR 0x0D 286 #define I2C_ADRS (*(volatile unsigned int *)0xa8000000) 287 #define USART_ON (unsigned int)~0x08 288 289 void sci_putc(unsigned char); 290 unsigned char sci_getc(void); 291 int SciErrCheck(void); 292 293 /* 294 * InitializeSci 295 * : unsigned int bps; 296 * : SCI(Serial Communication Interface) 297 */ 298 299 void 300 InitializeSci(unsigned int bps) 301 { 302 303 /* Initialize SCR */ 304 SHREG_SCSCR = 0x00; 305 306 /* Serial Mode Register */ 307 SHREG_SCSMR = 0x00; /* Async,8bit,NonParity,Even,1Stop,NoMulti */ 308 309 /* Bit Rate Register */ 310 SHREG_SCBRR = divrnd(sh_clock_get_pclock(), 32 * bps) - 1; 311 312 /* 313 * wait 1mSec, because Send/Recv must begin 1 bit period after 314 * BRR is set. 315 */ 316 delay(1000); 317 318 /* Send permission, Receive permission ON */ 319 SHREG_SCSCR = SCSCR_TE | SCSCR_RE; 320 321 /* Serial Status Register */ 322 SHREG_SCSSR &= SCSSR_TDRE; /* Clear Status */ 323 324 #if 0 325 I2C_ADRS &= ~0x08; /* enable RS-232C */ 326 #endif 327 } 328 329 330 /* 331 * sci_putc 332 * : unsigned char c; 333 */ 334 void 335 sci_putc(unsigned char c) 336 { 337 338 /* wait for ready */ 339 while ((SHREG_SCSSR & SCSSR_TDRE) == 0) 340 ; 341 342 /* write send data to send register */ 343 SHREG_SCTDR = c; 344 345 /* clear ready flag */ 346 SHREG_SCSSR &= ~SCSSR_TDRE; 347 } 348 349 /* 350 * : SciErrCheck 351 * 0x20 = over run 352 * 0x10 = frame error 353 * 0x80 = parity error 354 */ 355 int 356 SciErrCheck(void) 357 { 358 359 return(SHREG_SCSSR & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)); 360 } 361 362 /* 363 * sci_getc 364 */ 365 unsigned char 366 sci_getc(void) 367 { 368 unsigned char c, err_c; 369 370 while (((err_c = SHREG_SCSSR) 371 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) == 0) 372 ; 373 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 374 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 375 return(err_c |= 0x80); 376 } 377 378 c = SHREG_SCRDR; 379 380 SHREG_SCSSR &= ~SCSSR_RDRF; 381 382 return(c); 383 } 384 385 static int 386 sci_match(struct device *parent, struct cfdata *cfp, void *aux) 387 { 388 389 if (strcmp(cfp->cf_name, "sci") || sci_attached) 390 return 0; 391 392 return 1; 393 } 394 395 static void 396 sci_attach(struct device *parent, struct device *self, void *aux) 397 { 398 struct sci_softc *sc = (struct sci_softc *)self; 399 struct tty *tp; 400 401 sci_attached = 1; 402 403 sc->sc_hwflags = 0; /* XXX */ 404 sc->sc_swflags = 0; /* XXX */ 405 sc->sc_fifolen = 0; /* XXX */ 406 407 if (sciisconsole) { 408 SET(sc->sc_hwflags, SCI_HW_CONSOLE); 409 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 410 printf("\n%s: console\n", sc->sc_dev.dv_xname); 411 } else { 412 InitializeSci(9600); 413 printf("\n"); 414 } 415 416 callout_init(&sc->sc_diag_ch); 417 418 intc_intr_establish(SH_INTEVT_SCI_ERI, IST_LEVEL, IPL_SERIAL, sciintr, 419 sc); 420 intc_intr_establish(SH_INTEVT_SCI_RXI, IST_LEVEL, IPL_SERIAL, sciintr, 421 sc); 422 intc_intr_establish(SH_INTEVT_SCI_TXI, IST_LEVEL, IPL_SERIAL, sciintr, 423 sc); 424 intc_intr_establish(SH_INTEVT_SCI_TEI, IST_LEVEL, IPL_SERIAL, sciintr, 425 sc); 426 427 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 428 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, scisoft, sc); 429 #endif 430 SET(sc->sc_hwflags, SCI_HW_DEV_OK); 431 432 tp = ttymalloc(); 433 tp->t_oproc = scistart; 434 tp->t_param = sciparam; 435 tp->t_hwiflow = NULL; 436 437 sc->sc_tty = tp; 438 sc->sc_rbuf = malloc(sci_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 439 if (sc->sc_rbuf == NULL) { 440 printf("%s: unable to allocate ring buffer\n", 441 sc->sc_dev.dv_xname); 442 return; 443 } 444 sc->sc_ebuf = sc->sc_rbuf + (sci_rbuf_size << 1); 445 446 tty_attach(tp); 447 } 448 449 /* 450 * Start or restart transmission. 451 */ 452 static void 453 scistart(struct tty *tp) 454 { 455 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 456 int s; 457 458 s = spltty(); 459 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 460 goto out; 461 if (sc->sc_tx_stopped) 462 goto out; 463 464 if (tp->t_outq.c_cc <= tp->t_lowat) { 465 if (ISSET(tp->t_state, TS_ASLEEP)) { 466 CLR(tp->t_state, TS_ASLEEP); 467 wakeup(&tp->t_outq); 468 } 469 selwakeup(&tp->t_wsel); 470 if (tp->t_outq.c_cc == 0) 471 goto out; 472 } 473 474 /* Grab the first contiguous region of buffer space. */ 475 { 476 u_char *tba; 477 int tbc; 478 479 tba = tp->t_outq.c_cf; 480 tbc = ndqb(&tp->t_outq, 0); 481 482 (void)splserial(); 483 484 sc->sc_tba = tba; 485 sc->sc_tbc = tbc; 486 } 487 488 SET(tp->t_state, TS_BUSY); 489 sc->sc_tx_busy = 1; 490 491 /* Enable transmit completion interrupts if necessary. */ 492 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 493 494 /* Output the first byte of the contiguous buffer. */ 495 { 496 if (sc->sc_tbc > 0) { 497 sci_putc(*(sc->sc_tba)); 498 sc->sc_tba++; 499 sc->sc_tbc--; 500 } 501 } 502 out: 503 splx(s); 504 return; 505 } 506 507 /* 508 * Set SCI tty parameters from termios. 509 * XXX - Should just copy the whole termios after 510 * making sure all the changes could be done. 511 */ 512 static int 513 sciparam(struct tty *tp, struct termios *t) 514 { 515 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 516 int ospeed = t->c_ospeed; 517 int s; 518 519 if (!device_is_active(&sc->sc_dev)) 520 return (EIO); 521 522 /* Check requested parameters. */ 523 if (ospeed < 0) 524 return (EINVAL); 525 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 526 return (EINVAL); 527 528 /* 529 * For the console, always force CLOCAL and !HUPCL, so that the port 530 * is always active. 531 */ 532 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 533 ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 534 SET(t->c_cflag, CLOCAL); 535 CLR(t->c_cflag, HUPCL); 536 } 537 538 /* 539 * If there were no changes, don't do anything. This avoids dropping 540 * input and improves performance when all we did was frob things like 541 * VMIN and VTIME. 542 */ 543 if (tp->t_ospeed == t->c_ospeed && 544 tp->t_cflag == t->c_cflag) 545 return (0); 546 547 #if 0 548 /* XXX (msaitoh) */ 549 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 550 #endif 551 552 s = splserial(); 553 554 /* 555 * Set the FIFO threshold based on the receive speed. 556 * 557 * * If it's a low speed, it's probably a mouse or some other 558 * interactive device, so set the threshold low. 559 * * If it's a high speed, trim the trigger level down to prevent 560 * overflows. 561 * * Otherwise set it a bit higher. 562 */ 563 #if 0 564 /* XXX (msaitoh) */ 565 if (ISSET(sc->sc_hwflags, SCI_HW_HAYESP)) 566 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 567 else if (ISSET(sc->sc_hwflags, SCI_HW_FIFO)) 568 sc->sc_fifo = FIFO_ENABLE | 569 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 570 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 571 else 572 sc->sc_fifo = 0; 573 #endif 574 575 /* And copy to tty. */ 576 tp->t_ispeed = 0; 577 tp->t_ospeed = t->c_ospeed; 578 tp->t_cflag = t->c_cflag; 579 580 if (!sc->sc_heldchange) { 581 if (sc->sc_tx_busy) { 582 sc->sc_heldtbc = sc->sc_tbc; 583 sc->sc_tbc = 0; 584 sc->sc_heldchange = 1; 585 } 586 #if 0 587 /* XXX (msaitoh) */ 588 else 589 sci_loadchannelregs(sc); 590 #endif 591 } 592 593 if (!ISSET(t->c_cflag, CHWFLOW)) { 594 /* Disable the high water mark. */ 595 sc->sc_r_hiwat = 0; 596 sc->sc_r_lowat = 0; 597 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 598 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 599 sci_schedrx(sc); 600 } 601 } else { 602 sc->sc_r_hiwat = sci_rbuf_hiwat; 603 sc->sc_r_lowat = sci_rbuf_lowat; 604 } 605 606 splx(s); 607 608 #ifdef SCI_DEBUG 609 if (sci_debug) 610 scistatus(sc, "sciparam "); 611 #endif 612 613 if (!ISSET(t->c_cflag, CHWFLOW)) { 614 if (sc->sc_tx_stopped) { 615 sc->sc_tx_stopped = 0; 616 scistart(tp); 617 } 618 } 619 620 return (0); 621 } 622 623 void 624 sci_iflush(struct sci_softc *sc) 625 { 626 unsigned char err_c; 627 volatile unsigned char c; 628 629 if (((err_c = SHREG_SCSSR) 630 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 631 632 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 633 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 634 return; 635 } 636 637 c = SHREG_SCRDR; 638 639 SHREG_SCSSR &= ~SCSSR_RDRF; 640 } 641 } 642 643 int 644 sciopen(dev_t dev, int flag, int mode, struct lwp *l) 645 { 646 int unit = SCIUNIT(dev); 647 struct sci_softc *sc; 648 struct tty *tp; 649 int s, s2; 650 int error; 651 652 if (unit >= sci_cd.cd_ndevs) 653 return (ENXIO); 654 sc = sci_cd.cd_devs[unit]; 655 if (sc == 0 || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK) || 656 sc->sc_rbuf == NULL) 657 return (ENXIO); 658 659 if (!device_is_active(&sc->sc_dev)) 660 return (ENXIO); 661 662 #ifdef KGDB 663 /* 664 * If this is the kgdb port, no other use is permitted. 665 */ 666 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) 667 return (EBUSY); 668 #endif 669 670 tp = sc->sc_tty; 671 672 if (ISSET(tp->t_state, TS_ISOPEN) && 673 ISSET(tp->t_state, TS_XCLUDE) && 674 suser(l->l_proc->p_ucred, &l->l_proc->p_acflag) != 0) 675 return (EBUSY); 676 677 s = spltty(); 678 679 /* 680 * Do the following iff this is a first open. 681 */ 682 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 683 struct termios t; 684 685 tp->t_dev = dev; 686 687 s2 = splserial(); 688 689 /* Turn on interrupts. */ 690 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 691 692 splx(s2); 693 694 /* 695 * Initialize the termios status to the defaults. Add in the 696 * sticky bits from TIOCSFLAGS. 697 */ 698 t.c_ispeed = 0; 699 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 700 t.c_ospeed = scicn_speed; 701 t.c_cflag = sciconscflag; 702 } else { 703 t.c_ospeed = TTYDEF_SPEED; 704 t.c_cflag = TTYDEF_CFLAG; 705 } 706 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 707 SET(t.c_cflag, CLOCAL); 708 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 709 SET(t.c_cflag, CRTSCTS); 710 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 711 SET(t.c_cflag, MDMBUF); 712 /* Make sure sciparam() will do something. */ 713 tp->t_ospeed = 0; 714 (void) sciparam(tp, &t); 715 tp->t_iflag = TTYDEF_IFLAG; 716 tp->t_oflag = TTYDEF_OFLAG; 717 tp->t_lflag = TTYDEF_LFLAG; 718 ttychars(tp); 719 ttsetwater(tp); 720 721 s2 = splserial(); 722 723 /* Clear the input ring, and unblock. */ 724 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 725 sc->sc_rbavail = sci_rbuf_size; 726 sci_iflush(sc); 727 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 728 #if 0 729 /* XXX (msaitoh) */ 730 sci_hwiflow(sc); 731 #endif 732 733 #ifdef SCI_DEBUG 734 if (sci_debug) 735 scistatus(sc, "sciopen "); 736 #endif 737 738 splx(s2); 739 } 740 741 splx(s); 742 743 error = ttyopen(tp, SCIDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 744 if (error) 745 goto bad; 746 747 error = (*tp->t_linesw->l_open)(dev, tp); 748 if (error) 749 goto bad; 750 751 return (0); 752 753 bad: 754 755 return (error); 756 } 757 758 int 759 sciclose(dev_t dev, int flag, int mode, struct lwp *l) 760 { 761 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 762 struct tty *tp = sc->sc_tty; 763 764 /* XXX This is for cons.c. */ 765 if (!ISSET(tp->t_state, TS_ISOPEN)) 766 return (0); 767 768 (*tp->t_linesw->l_close)(tp, flag); 769 ttyclose(tp); 770 771 if (!device_is_active(&sc->sc_dev)) 772 return (0); 773 774 return (0); 775 } 776 777 int 778 sciread(dev_t dev, struct uio *uio, int flag) 779 { 780 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 781 struct tty *tp = sc->sc_tty; 782 783 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 784 } 785 786 int 787 sciwrite(dev_t dev, struct uio *uio, int flag) 788 { 789 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 790 struct tty *tp = sc->sc_tty; 791 792 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 793 } 794 795 int 796 scipoll(dev_t dev, int events, struct lwp *l) 797 { 798 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 799 struct tty *tp = sc->sc_tty; 800 801 return ((*tp->t_linesw->l_poll)(tp, events, l)); 802 } 803 804 struct tty * 805 scitty(dev_t dev) 806 { 807 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 808 struct tty *tp = sc->sc_tty; 809 810 return (tp); 811 } 812 813 int 814 sciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 815 { 816 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 817 struct tty *tp = sc->sc_tty; 818 int error; 819 int s; 820 821 if (!device_is_active(&sc->sc_dev)) 822 return (EIO); 823 824 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 825 if (error != EPASSTHROUGH) 826 return (error); 827 828 error = ttioctl(tp, cmd, data, flag, l); 829 if (error != EPASSTHROUGH) 830 return (error); 831 832 error = 0; 833 834 s = splserial(); 835 836 switch (cmd) { 837 case TIOCSBRK: 838 sci_break(sc, 1); 839 break; 840 841 case TIOCCBRK: 842 sci_break(sc, 0); 843 break; 844 845 case TIOCGFLAGS: 846 *(int *)data = sc->sc_swflags; 847 break; 848 849 case TIOCSFLAGS: 850 error = suser(l->l_proc->p_ucred, &l->l_proc->p_acflag); 851 if (error) 852 break; 853 sc->sc_swflags = *(int *)data; 854 break; 855 856 default: 857 error = EPASSTHROUGH; 858 break; 859 } 860 861 splx(s); 862 863 return (error); 864 } 865 866 integrate void 867 sci_schedrx(struct sci_softc *sc) 868 { 869 870 sc->sc_rx_ready = 1; 871 872 /* Wake up the poller. */ 873 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 874 softintr_schedule(sc->sc_si); 875 #else 876 #ifndef __NO_SOFT_SERIAL_INTERRUPT 877 setsoftserial(); 878 #else 879 if (!sci_softintr_scheduled) { 880 sci_softintr_scheduled = 1; 881 callout_reset(&sci_soft_ch, 1, scisoft, NULL); 882 } 883 #endif 884 #endif 885 } 886 887 void 888 sci_break(struct sci_softc *sc, int onoff) 889 { 890 891 if (onoff) 892 SHREG_SCSSR &= ~SCSSR_TDRE; 893 else 894 SHREG_SCSSR |= SCSSR_TDRE; 895 896 #if 0 /* XXX */ 897 if (!sc->sc_heldchange) { 898 if (sc->sc_tx_busy) { 899 sc->sc_heldtbc = sc->sc_tbc; 900 sc->sc_tbc = 0; 901 sc->sc_heldchange = 1; 902 } else 903 sci_loadchannelregs(sc); 904 } 905 #endif 906 } 907 908 /* 909 * Stop output, e.g., for ^S or output flush. 910 */ 911 void 912 scistop(struct tty *tp, int flag) 913 { 914 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 915 int s; 916 917 s = splserial(); 918 if (ISSET(tp->t_state, TS_BUSY)) { 919 /* Stop transmitting at the next chunk. */ 920 sc->sc_tbc = 0; 921 sc->sc_heldtbc = 0; 922 if (!ISSET(tp->t_state, TS_TTSTOP)) 923 SET(tp->t_state, TS_FLUSH); 924 } 925 splx(s); 926 } 927 928 void 929 scidiag(void *arg) 930 { 931 struct sci_softc *sc = arg; 932 int overflows, floods; 933 int s; 934 935 s = splserial(); 936 overflows = sc->sc_overflows; 937 sc->sc_overflows = 0; 938 floods = sc->sc_floods; 939 sc->sc_floods = 0; 940 sc->sc_errors = 0; 941 splx(s); 942 943 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 944 sc->sc_dev.dv_xname, 945 overflows, overflows == 1 ? "" : "s", 946 floods, floods == 1 ? "" : "s"); 947 } 948 949 integrate void 950 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 951 { 952 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 953 u_char *get, *end; 954 u_int cc, scc; 955 u_char ssr; 956 int code; 957 int s; 958 959 end = sc->sc_ebuf; 960 get = sc->sc_rbget; 961 scc = cc = sci_rbuf_size - sc->sc_rbavail; 962 963 if (cc == sci_rbuf_size) { 964 sc->sc_floods++; 965 if (sc->sc_errors++ == 0) 966 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 967 } 968 969 while (cc) { 970 code = get[0]; 971 ssr = get[1]; 972 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 973 if (ISSET(ssr, SCSSR_FER)) 974 SET(code, TTY_FE); 975 if (ISSET(ssr, SCSSR_PER)) 976 SET(code, TTY_PE); 977 } 978 if ((*rint)(code, tp) == -1) { 979 /* 980 * The line discipline's buffer is out of space. 981 */ 982 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 983 /* 984 * We're either not using flow control, or the 985 * line discipline didn't tell us to block for 986 * some reason. Either way, we have no way to 987 * know when there's more space available, so 988 * just drop the rest of the data. 989 */ 990 get += cc << 1; 991 if (get >= end) 992 get -= sci_rbuf_size << 1; 993 cc = 0; 994 } else { 995 /* 996 * Don't schedule any more receive processing 997 * until the line discipline tells us there's 998 * space available (through scihwiflow()). 999 * Leave the rest of the data in the input 1000 * buffer. 1001 */ 1002 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1003 } 1004 break; 1005 } 1006 get += 2; 1007 if (get >= end) 1008 get = sc->sc_rbuf; 1009 cc--; 1010 } 1011 1012 if (cc != scc) { 1013 sc->sc_rbget = get; 1014 s = splserial(); 1015 cc = sc->sc_rbavail += scc - cc; 1016 /* Buffers should be ok again, release possible block. */ 1017 if (cc >= sc->sc_r_lowat) { 1018 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1019 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1020 SHREG_SCSCR |= SCSCR_RIE; 1021 } 1022 #if 0 1023 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1024 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1025 sci_hwiflow(sc); 1026 } 1027 #endif 1028 } 1029 splx(s); 1030 } 1031 } 1032 1033 integrate void 1034 sci_txsoft(sc, tp) 1035 struct sci_softc *sc; 1036 struct tty *tp; 1037 { 1038 1039 CLR(tp->t_state, TS_BUSY); 1040 if (ISSET(tp->t_state, TS_FLUSH)) 1041 CLR(tp->t_state, TS_FLUSH); 1042 else 1043 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1044 (*tp->t_linesw->l_start)(tp); 1045 } 1046 1047 integrate void 1048 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1049 { 1050 #if 0 1051 /* XXX (msaitoh) */ 1052 u_char msr, delta; 1053 int s; 1054 1055 s = splserial(); 1056 msr = sc->sc_msr; 1057 delta = sc->sc_msr_delta; 1058 sc->sc_msr_delta = 0; 1059 splx(s); 1060 1061 if (ISSET(delta, sc->sc_msr_dcd)) { 1062 /* 1063 * Inform the tty layer that carrier detect changed. 1064 */ 1065 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1066 } 1067 1068 if (ISSET(delta, sc->sc_msr_cts)) { 1069 /* Block or unblock output according to flow control. */ 1070 if (ISSET(msr, sc->sc_msr_cts)) { 1071 sc->sc_tx_stopped = 0; 1072 (*tp->t_linesw->l_start)(tp); 1073 } else { 1074 sc->sc_tx_stopped = 1; 1075 } 1076 } 1077 1078 #ifdef SCI_DEBUG 1079 if (sci_debug) 1080 scistatus(sc, "sci_stsoft"); 1081 #endif 1082 #endif 1083 } 1084 1085 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1086 void 1087 scisoft(void *arg) 1088 { 1089 struct sci_softc *sc = arg; 1090 struct tty *tp; 1091 1092 if (!device_is_active(&sc->sc_dev)) 1093 return; 1094 1095 { 1096 #else 1097 void 1098 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1099 scisoft() 1100 #else 1101 scisoft(void *arg) 1102 #endif 1103 { 1104 struct sci_softc *sc; 1105 struct tty *tp; 1106 int unit; 1107 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1108 int s; 1109 1110 s = splsoftserial(); 1111 sci_softintr_scheduled = 0; 1112 #endif 1113 1114 for (unit = 0; unit < sci_cd.cd_ndevs; unit++) { 1115 sc = sci_cd.cd_devs[unit]; 1116 if (sc == NULL || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK)) 1117 continue; 1118 1119 if (!device_is_active(&sc->sc_dev)) 1120 continue; 1121 1122 tp = sc->sc_tty; 1123 if (tp == NULL) 1124 continue; 1125 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1126 continue; 1127 #endif 1128 tp = sc->sc_tty; 1129 1130 if (sc->sc_rx_ready) { 1131 sc->sc_rx_ready = 0; 1132 sci_rxsoft(sc, tp); 1133 } 1134 1135 #if 0 1136 if (sc->sc_st_check) { 1137 sc->sc_st_check = 0; 1138 sci_stsoft(sc, tp); 1139 } 1140 #endif 1141 1142 if (sc->sc_tx_done) { 1143 sc->sc_tx_done = 0; 1144 sci_txsoft(sc, tp); 1145 } 1146 } 1147 1148 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1149 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1150 splx(s); 1151 #endif 1152 #endif 1153 } 1154 1155 int 1156 sciintr(void *arg) 1157 { 1158 struct sci_softc *sc = arg; 1159 u_char *put, *end; 1160 u_int cc; 1161 u_short ssr; 1162 1163 if (!device_is_active(&sc->sc_dev)) 1164 return (0); 1165 1166 end = sc->sc_ebuf; 1167 put = sc->sc_rbput; 1168 cc = sc->sc_rbavail; 1169 1170 do { 1171 ssr = SHREG_SCSSR; 1172 if (ISSET(ssr, SCSSR_FER)) { 1173 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_PER | SCSSR_FER); 1174 #if defined(DDB) || defined(KGDB) 1175 #ifdef SH4 1176 if ((SHREG_SCSPTR & SCSPTR_SPB0DT) != 0) { 1177 #else 1178 if ((SHREG_SCSPDR & SCSPDR_SCP0DT) != 0) { 1179 #endif 1180 #ifdef DDB 1181 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 1182 console_debugger(); 1183 } 1184 #endif 1185 #ifdef KGDB 1186 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) { 1187 kgdb_connect(1); 1188 } 1189 #endif 1190 } 1191 #endif /* DDB || KGDB */ 1192 } 1193 if ((SHREG_SCSSR & SCSSR_RDRF) != 0) { 1194 if (cc > 0) { 1195 put[0] = SHREG_SCRDR; 1196 put[1] = SHREG_SCSSR & 0x00ff; 1197 1198 put += 2; 1199 if (put >= end) 1200 put = sc->sc_rbuf; 1201 cc--; 1202 } 1203 1204 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1205 SCSSR_RDRF); 1206 1207 /* 1208 * Current string of incoming characters ended because 1209 * no more data was available or we ran out of space. 1210 * Schedule a receive event if any data was received. 1211 * If we're out of space, turn off receive interrupts. 1212 */ 1213 sc->sc_rbput = put; 1214 sc->sc_rbavail = cc; 1215 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1216 sc->sc_rx_ready = 1; 1217 1218 /* 1219 * See if we are in danger of overflowing a buffer. If 1220 * so, use hardware flow control to ease the pressure. 1221 */ 1222 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1223 cc < sc->sc_r_hiwat) { 1224 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1225 #if 0 1226 sci_hwiflow(sc); 1227 #endif 1228 } 1229 1230 /* 1231 * If we're out of space, disable receive interrupts 1232 * until the queue has drained a bit. 1233 */ 1234 if (!cc) { 1235 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1236 SHREG_SCSCR &= ~SCSCR_RIE; 1237 } 1238 } else { 1239 if (SHREG_SCSSR & SCSSR_RDRF) { 1240 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1241 delay(10); 1242 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 1243 continue; 1244 } 1245 } 1246 } while (SHREG_SCSSR & SCSSR_RDRF); 1247 1248 #if 0 1249 msr = bus_space_read_1(iot, ioh, sci_msr); 1250 delta = msr ^ sc->sc_msr; 1251 sc->sc_msr = msr; 1252 if (ISSET(delta, sc->sc_msr_mask)) { 1253 SET(sc->sc_msr_delta, delta); 1254 1255 /* 1256 * Pulse-per-second clock signal on edge of DCD? 1257 */ 1258 if (ISSET(delta, sc->sc_ppsmask)) { 1259 struct timeval tv; 1260 if (ISSET(msr, sc->sc_ppsmask) == 1261 sc->sc_ppsassert) { 1262 /* XXX nanotime() */ 1263 microtime(&tv); 1264 TIMEVAL_TO_TIMESPEC(&tv, 1265 &sc->ppsinfo.assert_timestamp); 1266 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1267 timespecadd(&sc->ppsinfo.assert_timestamp, 1268 &sc->ppsparam.assert_offset, 1269 &sc->ppsinfo.assert_timestamp); 1270 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1271 } 1272 1273 #ifdef PPS_SYNC 1274 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1275 hardpps(&tv, tv.tv_usec); 1276 #endif 1277 sc->ppsinfo.assert_sequence++; 1278 sc->ppsinfo.current_mode = 1279 sc->ppsparam.mode; 1280 1281 } else if (ISSET(msr, sc->sc_ppsmask) == 1282 sc->sc_ppsclear) { 1283 /* XXX nanotime() */ 1284 microtime(&tv); 1285 TIMEVAL_TO_TIMESPEC(&tv, 1286 &sc->ppsinfo.clear_timestamp); 1287 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1288 timespecadd(&sc->ppsinfo.clear_timestamp, 1289 &sc->ppsparam.clear_offset, 1290 &sc->ppsinfo.clear_timestamp); 1291 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1292 } 1293 1294 #ifdef PPS_SYNC 1295 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1296 hardpps(&tv, tv.tv_usec); 1297 #endif 1298 sc->ppsinfo.clear_sequence++; 1299 sc->ppsinfo.current_mode = 1300 sc->ppsparam.mode; 1301 } 1302 } 1303 1304 /* 1305 * Stop output immediately if we lose the output 1306 * flow control signal or carrier detect. 1307 */ 1308 if (ISSET(~msr, sc->sc_msr_mask)) { 1309 sc->sc_tbc = 0; 1310 sc->sc_heldtbc = 0; 1311 #ifdef SCI_DEBUG 1312 if (sci_debug) 1313 scistatus(sc, "sciintr "); 1314 #endif 1315 } 1316 1317 sc->sc_st_check = 1; 1318 } 1319 #endif 1320 1321 /* 1322 * Done handling any receive interrupts. See if data can be 1323 * transmitted as well. Schedule tx done event if no data left 1324 * and tty was marked busy. 1325 */ 1326 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1327 /* 1328 * If we've delayed a parameter change, do it now, and restart 1329 * output. 1330 */ 1331 if (sc->sc_heldchange) { 1332 sc->sc_heldchange = 0; 1333 sc->sc_tbc = sc->sc_heldtbc; 1334 sc->sc_heldtbc = 0; 1335 } 1336 1337 /* Output the next chunk of the contiguous buffer, if any. */ 1338 if (sc->sc_tbc > 0) { 1339 sci_putc(*(sc->sc_tba)); 1340 sc->sc_tba++; 1341 sc->sc_tbc--; 1342 } else { 1343 /* Disable transmit completion interrupts if necessary. */ 1344 #if 0 1345 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1346 #endif 1347 SHREG_SCSCR &= ~SCSCR_TIE; 1348 1349 if (sc->sc_tx_busy) { 1350 sc->sc_tx_busy = 0; 1351 sc->sc_tx_done = 1; 1352 } 1353 } 1354 } 1355 1356 /* Wake up the poller. */ 1357 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1358 softintr_schedule(sc->sc_si); 1359 #else 1360 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1361 setsoftserial(); 1362 #else 1363 if (!sci_softintr_scheduled) { 1364 sci_softintr_scheduled = 1; 1365 callout_reset(&sci_soft_ch, 1, scisoft, 1); 1366 } 1367 #endif 1368 #endif 1369 1370 #if NRND > 0 && defined(RND_SCI) 1371 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1372 #endif 1373 1374 return (1); 1375 } 1376 1377 void 1378 scicnprobe(cp) 1379 struct consdev *cp; 1380 { 1381 int maj; 1382 1383 /* locate the major number */ 1384 maj = cdevsw_lookup_major(&sci_cdevsw); 1385 1386 /* Initialize required fields. */ 1387 cp->cn_dev = makedev(maj, 0); 1388 #ifdef SCICONSOLE 1389 cp->cn_pri = CN_REMOTE; 1390 #else 1391 cp->cn_pri = CN_NORMAL; 1392 #endif 1393 } 1394 1395 void 1396 scicninit(struct consdev *cp) 1397 { 1398 1399 InitializeSci(scicn_speed); 1400 sciisconsole = 1; 1401 } 1402 1403 int 1404 scicngetc(dev_t dev) 1405 { 1406 int c; 1407 int s; 1408 1409 s = splserial(); 1410 c = sci_getc(); 1411 splx(s); 1412 1413 return (c); 1414 } 1415 1416 void 1417 scicnputc(dev_t dev, int c) 1418 { 1419 int s; 1420 1421 s = splserial(); 1422 sci_putc((u_char)c); 1423 splx(s); 1424 } 1425
Indexes created Mon Sep 22 13:09:51 GMT 2025