sci.c revision 1.32
1 /* $NetBSD: sci.c,v 1.32 2002/10/02 15:52:34 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. All advertising materials mentioning features or use of this software 78 * must display the following acknowledgement: 79 * This product includes software developed by the University of 80 * California, Berkeley and its contributors. 81 * 4. Neither the name of the University nor the names of its contributors 82 * may be used to endorse or promote products derived from this software 83 * without specific prior written permission. 84 * 85 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 86 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 87 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 88 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 89 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 90 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 91 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 92 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 93 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 94 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 95 * SUCH DAMAGE. 96 * 97 * @(#)com.c 7.5 (Berkeley) 5/16/91 98 */ 99 100 /* 101 * SH internal serial driver 102 * 103 * This code is derived from both z8530tty.c and com.c 104 */ 105 106 #include "opt_kgdb.h" 107 #include "opt_sci.h" 108 109 #include <sys/param.h> 110 #include <sys/systm.h> 111 #include <sys/tty.h> 112 #include <sys/proc.h> 113 #include <sys/conf.h> 114 #include <sys/file.h> 115 #include <sys/syslog.h> 116 #include <sys/kernel.h> 117 #include <sys/device.h> 118 #include <sys/malloc.h> 119 120 #include <dev/cons.h> 121 122 #include <sh3/clock.h> 123 #include <sh3/scireg.h> 124 #include <sh3/pfcreg.h> 125 #include <sh3/tmureg.h> 126 #include <sh3/exception.h> 127 #include <machine/intr.h> 128 129 static void scistart(struct tty *); 130 static int sciparam(struct tty *, struct termios *); 131 132 void scicnprobe(struct consdev *); 133 void scicninit(struct consdev *); 134 void scicnputc(dev_t, int); 135 int scicngetc(dev_t); 136 void scicnpoolc(dev_t, int); 137 int sciintr(void *); 138 139 struct sci_softc { 140 struct device sc_dev; /* boilerplate */ 141 struct tty *sc_tty; 142 void *sc_si; 143 struct callout sc_diag_ch; 144 145 #if 0 146 bus_space_tag_t sc_iot; /* ISA i/o space identifier */ 147 bus_space_handle_t sc_ioh; /* ISA io handle */ 148 149 int sc_drq; 150 151 int sc_frequency; 152 #endif 153 154 u_int sc_overflows, 155 sc_floods, 156 sc_errors; /* number of retries so far */ 157 u_char sc_status[7]; /* copy of registers */ 158 159 int sc_hwflags; 160 int sc_swflags; 161 u_int sc_fifolen; /* XXX always 0? */ 162 163 u_int sc_r_hiwat, 164 sc_r_lowat; 165 u_char *volatile sc_rbget, 166 *volatile sc_rbput; 167 volatile u_int sc_rbavail; 168 u_char *sc_rbuf, 169 *sc_ebuf; 170 171 u_char *sc_tba; /* transmit buffer address */ 172 u_int sc_tbc, /* transmit byte count */ 173 sc_heldtbc; 174 175 volatile u_char sc_rx_flags, /* receiver blocked */ 176 #define RX_TTY_BLOCKED 0x01 177 #define RX_TTY_OVERFLOWED 0x02 178 #define RX_IBUF_BLOCKED 0x04 179 #define RX_IBUF_OVERFLOWED 0x08 180 #define RX_ANY_BLOCK 0x0f 181 sc_tx_busy, /* working on an output chunk */ 182 sc_tx_done, /* done with one output chunk */ 183 sc_tx_stopped, /* H/W level stop (lost CTS) */ 184 sc_st_check, /* got a status interrupt */ 185 sc_rx_ready; 186 187 volatile u_char sc_heldchange; 188 }; 189 190 /* controller driver configuration */ 191 static int sci_match(struct device *, struct cfdata *, void *); 192 static void sci_attach(struct device *, struct device *, void *); 193 194 void sci_break(struct sci_softc *, int); 195 void sci_iflush(struct sci_softc *); 196 197 #define integrate static inline 198 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 199 void scisoft(void *); 200 #else 201 #ifndef __NO_SOFT_SERIAL_INTERRUPT 202 void scisoft(void); 203 #else 204 void scisoft(void *); 205 #endif 206 #endif 207 integrate void sci_rxsoft(struct sci_softc *, struct tty *); 208 integrate void sci_txsoft(struct sci_softc *, struct tty *); 209 integrate void sci_stsoft(struct sci_softc *, struct tty *); 210 integrate void sci_schedrx(struct sci_softc *); 211 void scidiag(void *); 212 213 #define SCIUNIT_MASK 0x7ffff 214 #define SCIDIALOUT_MASK 0x80000 215 216 #define SCIUNIT(x) (minor(x) & SCIUNIT_MASK) 217 #define SCIDIALOUT(x) (minor(x) & SCIDIALOUT_MASK) 218 219 /* Macros to clear/set/test flags. */ 220 #define SET(t, f) (t) |= (f) 221 #define CLR(t, f) (t) &= ~(f) 222 #define ISSET(t, f) ((t) & (f)) 223 224 /* Hardware flag masks */ 225 #define SCI_HW_NOIEN 0x01 226 #define SCI_HW_FIFO 0x02 227 #define SCI_HW_FLOW 0x08 228 #define SCI_HW_DEV_OK 0x20 229 #define SCI_HW_CONSOLE 0x40 230 #define SCI_HW_KGDB 0x80 231 232 /* Buffer size for character buffer */ 233 #define SCI_RING_SIZE 2048 234 235 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 236 u_int sci_rbuf_hiwat = (SCI_RING_SIZE * 1) / 4; 237 u_int sci_rbuf_lowat = (SCI_RING_SIZE * 3) / 4; 238 239 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 240 int sciconscflag = CONMODE; 241 int sciisconsole = 0; 242 243 #ifdef SCICN_SPEED 244 int scicn_speed = SCICN_SPEED; 245 #else 246 int scicn_speed = 9600; 247 #endif 248 249 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 250 251 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 252 #ifdef __NO_SOFT_SERIAL_INTERRUPT 253 volatile int sci_softintr_scheduled; 254 struct callout sci_soft_ch = CALLOUT_INITIALIZER; 255 #endif 256 #endif 257 258 u_int sci_rbuf_size = SCI_RING_SIZE; 259 260 CFATTACH_DECL(sci, sizeof(struct sci_softc), 261 sci_match, sci_attach, NULL, NULL); 262 263 extern struct cfdriver sci_cd; 264 265 dev_type_open(sciopen); 266 dev_type_close(sciclose); 267 dev_type_read(sciread); 268 dev_type_write(sciwrite); 269 dev_type_ioctl(sciioctl); 270 dev_type_stop(scistop); 271 dev_type_tty(scitty); 272 dev_type_poll(scipoll); 273 274 const struct cdevsw sci_cdevsw = { 275 sciopen, sciclose, sciread, sciwrite, sciioctl, 276 scistop, scitty, scipoll, nommap, D_TTY 277 }; 278 279 void InitializeSci (unsigned int); 280 281 /* 282 * following functions are debugging prupose only 283 */ 284 #define CR 0x0D 285 #define I2C_ADRS (*(volatile unsigned int *)0xa8000000) 286 #define USART_ON (unsigned int)~0x08 287 288 void sci_putc(unsigned char); 289 unsigned char sci_getc(void); 290 int SciErrCheck(void); 291 292 /* 293 * InitializeSci 294 * : unsigned int bps; 295 * : SCI(Serial Communication Interface) 296 */ 297 298 void 299 InitializeSci(unsigned int bps) 300 { 301 302 /* Initialize SCR */ 303 SHREG_SCSCR = 0x00; 304 305 /* Serial Mode Register */ 306 SHREG_SCSMR = 0x00; /* Async,8bit,NonParity,Even,1Stop,NoMulti */ 307 308 /* Bit Rate Register */ 309 SHREG_SCBRR = divrnd(sh_clock_get_pclock(), 32 * bps) - 1; 310 311 /* 312 * wait 1mSec, because Send/Recv must begin 1 bit period after 313 * BRR is set. 314 */ 315 delay(1000); 316 317 /* Send permission, Receive permission ON */ 318 SHREG_SCSCR = SCSCR_TE | SCSCR_RE; 319 320 /* Serial Status Register */ 321 SHREG_SCSSR &= SCSSR_TDRE; /* Clear Status */ 322 323 #if 0 324 I2C_ADRS &= ~0x08; /* enable RS-232C */ 325 #endif 326 } 327 328 329 /* 330 * sci_putc 331 * : unsigned char c; 332 */ 333 void 334 sci_putc(unsigned char c) 335 { 336 337 /* wait for ready */ 338 while ((SHREG_SCSSR & SCSSR_TDRE) == NULL) 339 ; 340 341 /* write send data to send register */ 342 SHREG_SCTDR = c; 343 344 /* clear ready flag */ 345 SHREG_SCSSR &= ~SCSSR_TDRE; 346 } 347 348 /* 349 * : SciErrCheck 350 * 0x20 = over run 351 * 0x10 = frame error 352 * 0x80 = parity error 353 */ 354 int 355 SciErrCheck(void) 356 { 357 358 return(SHREG_SCSSR & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)); 359 } 360 361 /* 362 * sci_getc 363 */ 364 unsigned char 365 sci_getc(void) 366 { 367 unsigned char c, err_c; 368 369 while (((err_c = SHREG_SCSSR) 370 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) == 0) 371 ; 372 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 373 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 374 return(err_c |= 0x80); 375 } 376 377 c = SHREG_SCRDR; 378 379 SHREG_SCSSR &= ~SCSSR_RDRF; 380 381 return(c); 382 } 383 384 #if 0 385 #define SCI_MAX_UNITS 2 386 #else 387 #define SCI_MAX_UNITS 1 388 #endif 389 390 391 static int 392 sci_match(struct device *parent, struct cfdata *cfp, void *aux) 393 { 394 395 if (strcmp(cfp->cf_name, "sci") 396 || cfp->cf_unit >= SCI_MAX_UNITS) //XXX __BROKEN_CONFIG_UNIT_USAGE 397 return 0; 398 399 return 1; 400 } 401 402 static void 403 sci_attach(struct device *parent, struct device *self, void *aux) 404 { 405 struct sci_softc *sc = (struct sci_softc *)self; 406 struct tty *tp; 407 408 sc->sc_hwflags = 0; /* XXX */ 409 sc->sc_swflags = 0; /* XXX */ 410 sc->sc_fifolen = 0; /* XXX */ 411 412 if (sciisconsole) { 413 SET(sc->sc_hwflags, SCI_HW_CONSOLE); 414 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 415 printf("\n%s: console\n", sc->sc_dev.dv_xname); 416 } else { 417 InitializeSci(9600); 418 printf("\n"); 419 } 420 421 callout_init(&sc->sc_diag_ch); 422 423 intc_intr_establish(SH_INTEVT_SCI_ERI, IST_LEVEL, IPL_SERIAL, sciintr, 424 sc); 425 intc_intr_establish(SH_INTEVT_SCI_RXI, IST_LEVEL, IPL_SERIAL, sciintr, 426 sc); 427 intc_intr_establish(SH_INTEVT_SCI_TXI, IST_LEVEL, IPL_SERIAL, sciintr, 428 sc); 429 intc_intr_establish(SH_INTEVT_SCI_TEI, IST_LEVEL, IPL_SERIAL, sciintr, 430 sc); 431 432 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 433 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, scisoft, sc); 434 #endif 435 SET(sc->sc_hwflags, SCI_HW_DEV_OK); 436 437 tp = ttymalloc(); 438 tp->t_oproc = scistart; 439 tp->t_param = sciparam; 440 tp->t_hwiflow = NULL; 441 442 sc->sc_tty = tp; 443 sc->sc_rbuf = malloc(sci_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 444 if (sc->sc_rbuf == NULL) { 445 printf("%s: unable to allocate ring buffer\n", 446 sc->sc_dev.dv_xname); 447 return; 448 } 449 sc->sc_ebuf = sc->sc_rbuf + (sci_rbuf_size << 1); 450 451 tty_attach(tp); 452 } 453 454 /* 455 * Start or restart transmission. 456 */ 457 static void 458 scistart(struct tty *tp) 459 { 460 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 461 int s; 462 463 s = spltty(); 464 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 465 goto out; 466 if (sc->sc_tx_stopped) 467 goto out; 468 469 if (tp->t_outq.c_cc <= tp->t_lowat) { 470 if (ISSET(tp->t_state, TS_ASLEEP)) { 471 CLR(tp->t_state, TS_ASLEEP); 472 wakeup(&tp->t_outq); 473 } 474 selwakeup(&tp->t_wsel); 475 if (tp->t_outq.c_cc == 0) 476 goto out; 477 } 478 479 /* Grab the first contiguous region of buffer space. */ 480 { 481 u_char *tba; 482 int tbc; 483 484 tba = tp->t_outq.c_cf; 485 tbc = ndqb(&tp->t_outq, 0); 486 487 (void)splserial(); 488 489 sc->sc_tba = tba; 490 sc->sc_tbc = tbc; 491 } 492 493 SET(tp->t_state, TS_BUSY); 494 sc->sc_tx_busy = 1; 495 496 /* Enable transmit completion interrupts if necessary. */ 497 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 498 499 /* Output the first byte of the contiguous buffer. */ 500 { 501 if (sc->sc_tbc > 0) { 502 sci_putc(*(sc->sc_tba)); 503 sc->sc_tba++; 504 sc->sc_tbc--; 505 } 506 } 507 out: 508 splx(s); 509 return; 510 } 511 512 /* 513 * Set SCI tty parameters from termios. 514 * XXX - Should just copy the whole termios after 515 * making sure all the changes could be done. 516 */ 517 static int 518 sciparam(struct tty *tp, struct termios *t) 519 { 520 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 521 int ospeed = t->c_ospeed; 522 int s; 523 524 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 525 return (EIO); 526 527 /* Check requested parameters. */ 528 if (ospeed < 0) 529 return (EINVAL); 530 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 531 return (EINVAL); 532 533 /* 534 * For the console, always force CLOCAL and !HUPCL, so that the port 535 * is always active. 536 */ 537 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 538 ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 539 SET(t->c_cflag, CLOCAL); 540 CLR(t->c_cflag, HUPCL); 541 } 542 543 /* 544 * If there were no changes, don't do anything. This avoids dropping 545 * input and improves performance when all we did was frob things like 546 * VMIN and VTIME. 547 */ 548 if (tp->t_ospeed == t->c_ospeed && 549 tp->t_cflag == t->c_cflag) 550 return (0); 551 552 #if 0 553 /* XXX (msaitoh) */ 554 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 555 #endif 556 557 s = splserial(); 558 559 /* 560 * Set the FIFO threshold based on the receive speed. 561 * 562 * * If it's a low speed, it's probably a mouse or some other 563 * interactive device, so set the threshold low. 564 * * If it's a high speed, trim the trigger level down to prevent 565 * overflows. 566 * * Otherwise set it a bit higher. 567 */ 568 #if 0 569 /* XXX (msaitoh) */ 570 if (ISSET(sc->sc_hwflags, SCI_HW_HAYESP)) 571 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 572 else if (ISSET(sc->sc_hwflags, SCI_HW_FIFO)) 573 sc->sc_fifo = FIFO_ENABLE | 574 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 575 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 576 else 577 sc->sc_fifo = 0; 578 #endif 579 580 /* And copy to tty. */ 581 tp->t_ispeed = 0; 582 tp->t_ospeed = t->c_ospeed; 583 tp->t_cflag = t->c_cflag; 584 585 if (!sc->sc_heldchange) { 586 if (sc->sc_tx_busy) { 587 sc->sc_heldtbc = sc->sc_tbc; 588 sc->sc_tbc = 0; 589 sc->sc_heldchange = 1; 590 } 591 #if 0 592 /* XXX (msaitoh) */ 593 else 594 sci_loadchannelregs(sc); 595 #endif 596 } 597 598 if (!ISSET(t->c_cflag, CHWFLOW)) { 599 /* Disable the high water mark. */ 600 sc->sc_r_hiwat = 0; 601 sc->sc_r_lowat = 0; 602 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 603 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 604 sci_schedrx(sc); 605 } 606 } else { 607 sc->sc_r_hiwat = sci_rbuf_hiwat; 608 sc->sc_r_lowat = sci_rbuf_lowat; 609 } 610 611 splx(s); 612 613 #ifdef SCI_DEBUG 614 if (sci_debug) 615 scistatus(sc, "sciparam "); 616 #endif 617 618 if (!ISSET(t->c_cflag, CHWFLOW)) { 619 if (sc->sc_tx_stopped) { 620 sc->sc_tx_stopped = 0; 621 scistart(tp); 622 } 623 } 624 625 return (0); 626 } 627 628 void 629 sci_iflush(struct sci_softc *sc) 630 { 631 unsigned char err_c; 632 volatile unsigned char c; 633 634 if (((err_c = SHREG_SCSSR) 635 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 636 637 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 638 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 639 return; 640 } 641 642 c = SHREG_SCRDR; 643 644 SHREG_SCSSR &= ~SCSSR_RDRF; 645 } 646 } 647 648 int 649 sciopen(dev_t dev, int flag, int mode, struct proc *p) 650 { 651 int unit = SCIUNIT(dev); 652 struct sci_softc *sc; 653 struct tty *tp; 654 int s, s2; 655 int error; 656 657 if (unit >= sci_cd.cd_ndevs) 658 return (ENXIO); 659 sc = sci_cd.cd_devs[unit]; 660 if (sc == 0 || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK) || 661 sc->sc_rbuf == NULL) 662 return (ENXIO); 663 664 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 665 return (ENXIO); 666 667 #ifdef KGDB 668 /* 669 * If this is the kgdb port, no other use is permitted. 670 */ 671 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) 672 return (EBUSY); 673 #endif 674 675 tp = sc->sc_tty; 676 677 if (ISSET(tp->t_state, TS_ISOPEN) && 678 ISSET(tp->t_state, TS_XCLUDE) && 679 p->p_ucred->cr_uid != 0) 680 return (EBUSY); 681 682 s = spltty(); 683 684 /* 685 * Do the following iff this is a first open. 686 */ 687 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 688 struct termios t; 689 690 tp->t_dev = dev; 691 692 s2 = splserial(); 693 694 /* Turn on interrupts. */ 695 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 696 697 splx(s2); 698 699 /* 700 * Initialize the termios status to the defaults. Add in the 701 * sticky bits from TIOCSFLAGS. 702 */ 703 t.c_ispeed = 0; 704 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 705 t.c_ospeed = scicn_speed; 706 t.c_cflag = sciconscflag; 707 } else { 708 t.c_ospeed = TTYDEF_SPEED; 709 t.c_cflag = TTYDEF_CFLAG; 710 } 711 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 712 SET(t.c_cflag, CLOCAL); 713 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 714 SET(t.c_cflag, CRTSCTS); 715 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 716 SET(t.c_cflag, MDMBUF); 717 /* Make sure sciparam() will do something. */ 718 tp->t_ospeed = 0; 719 (void) sciparam(tp, &t); 720 tp->t_iflag = TTYDEF_IFLAG; 721 tp->t_oflag = TTYDEF_OFLAG; 722 tp->t_lflag = TTYDEF_LFLAG; 723 ttychars(tp); 724 ttsetwater(tp); 725 726 s2 = splserial(); 727 728 /* Clear the input ring, and unblock. */ 729 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 730 sc->sc_rbavail = sci_rbuf_size; 731 sci_iflush(sc); 732 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 733 #if 0 734 /* XXX (msaitoh) */ 735 sci_hwiflow(sc); 736 #endif 737 738 #ifdef SCI_DEBUG 739 if (sci_debug) 740 scistatus(sc, "sciopen "); 741 #endif 742 743 splx(s2); 744 } 745 746 splx(s); 747 748 error = ttyopen(tp, SCIDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 749 if (error) 750 goto bad; 751 752 error = (*tp->t_linesw->l_open)(dev, tp); 753 if (error) 754 goto bad; 755 756 return (0); 757 758 bad: 759 760 return (error); 761 } 762 763 int 764 sciclose(dev_t dev, int flag, int mode, struct proc *p) 765 { 766 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 767 struct tty *tp = sc->sc_tty; 768 769 /* XXX This is for cons.c. */ 770 if (!ISSET(tp->t_state, TS_ISOPEN)) 771 return (0); 772 773 (*tp->t_linesw->l_close)(tp, flag); 774 ttyclose(tp); 775 776 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 777 return (0); 778 779 return (0); 780 } 781 782 int 783 sciread(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_read)(tp, uio, flag)); 789 } 790 791 int 792 sciwrite(dev_t dev, struct uio *uio, int flag) 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_write)(tp, uio, flag)); 798 } 799 800 int 801 scipoll(dev_t dev, int events, struct proc *p) 802 { 803 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 804 struct tty *tp = sc->sc_tty; 805 806 return ((*tp->t_linesw->l_poll)(tp, events, p)); 807 } 808 809 struct tty * 810 scitty(dev_t dev) 811 { 812 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 813 struct tty *tp = sc->sc_tty; 814 815 return (tp); 816 } 817 818 int 819 sciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 820 { 821 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 822 struct tty *tp = sc->sc_tty; 823 int error; 824 int s; 825 826 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 827 return (EIO); 828 829 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 830 if (error != EPASSTHROUGH) 831 return (error); 832 833 error = ttioctl(tp, cmd, data, flag, p); 834 if (error != EPASSTHROUGH) 835 return (error); 836 837 error = 0; 838 839 s = splserial(); 840 841 switch (cmd) { 842 case TIOCSBRK: 843 sci_break(sc, 1); 844 break; 845 846 case TIOCCBRK: 847 sci_break(sc, 0); 848 break; 849 850 case TIOCGFLAGS: 851 *(int *)data = sc->sc_swflags; 852 break; 853 854 case TIOCSFLAGS: 855 error = suser(p->p_ucred, &p->p_acflag); 856 if (error) 857 break; 858 sc->sc_swflags = *(int *)data; 859 break; 860 861 default: 862 error = EPASSTHROUGH; 863 break; 864 } 865 866 splx(s); 867 868 return (error); 869 } 870 871 integrate void 872 sci_schedrx(struct sci_softc *sc) 873 { 874 875 sc->sc_rx_ready = 1; 876 877 /* Wake up the poller. */ 878 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 879 softintr_schedule(sc->sc_si); 880 #else 881 #ifndef __NO_SOFT_SERIAL_INTERRUPT 882 setsoftserial(); 883 #else 884 if (!sci_softintr_scheduled) { 885 sci_softintr_scheduled = 1; 886 callout_reset(&sci_soft_ch, 1, scisoft, NULL); 887 } 888 #endif 889 #endif 890 } 891 892 void 893 sci_break(struct sci_softc *sc, int onoff) 894 { 895 896 if (onoff) 897 SHREG_SCSSR &= ~SCSSR_TDRE; 898 else 899 SHREG_SCSSR |= SCSSR_TDRE; 900 901 #if 0 /* XXX */ 902 if (!sc->sc_heldchange) { 903 if (sc->sc_tx_busy) { 904 sc->sc_heldtbc = sc->sc_tbc; 905 sc->sc_tbc = 0; 906 sc->sc_heldchange = 1; 907 } else 908 sci_loadchannelregs(sc); 909 } 910 #endif 911 } 912 913 /* 914 * Stop output, e.g., for ^S or output flush. 915 */ 916 void 917 scistop(struct tty *tp, int flag) 918 { 919 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 920 int s; 921 922 s = splserial(); 923 if (ISSET(tp->t_state, TS_BUSY)) { 924 /* Stop transmitting at the next chunk. */ 925 sc->sc_tbc = 0; 926 sc->sc_heldtbc = 0; 927 if (!ISSET(tp->t_state, TS_TTSTOP)) 928 SET(tp->t_state, TS_FLUSH); 929 } 930 splx(s); 931 } 932 933 void 934 scidiag(void *arg) 935 { 936 struct sci_softc *sc = arg; 937 int overflows, floods; 938 int s; 939 940 s = splserial(); 941 overflows = sc->sc_overflows; 942 sc->sc_overflows = 0; 943 floods = sc->sc_floods; 944 sc->sc_floods = 0; 945 sc->sc_errors = 0; 946 splx(s); 947 948 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 949 sc->sc_dev.dv_xname, 950 overflows, overflows == 1 ? "" : "s", 951 floods, floods == 1 ? "" : "s"); 952 } 953 954 integrate void 955 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 956 { 957 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 958 u_char *get, *end; 959 u_int cc, scc; 960 u_char ssr; 961 int code; 962 int s; 963 964 end = sc->sc_ebuf; 965 get = sc->sc_rbget; 966 scc = cc = sci_rbuf_size - sc->sc_rbavail; 967 968 if (cc == sci_rbuf_size) { 969 sc->sc_floods++; 970 if (sc->sc_errors++ == 0) 971 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 972 } 973 974 while (cc) { 975 code = get[0]; 976 ssr = get[1]; 977 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 978 if (ISSET(ssr, SCSSR_FER)) 979 SET(code, TTY_FE); 980 if (ISSET(ssr, SCSSR_PER)) 981 SET(code, TTY_PE); 982 } 983 if ((*rint)(code, tp) == -1) { 984 /* 985 * The line discipline's buffer is out of space. 986 */ 987 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 988 /* 989 * We're either not using flow control, or the 990 * line discipline didn't tell us to block for 991 * some reason. Either way, we have no way to 992 * know when there's more space available, so 993 * just drop the rest of the data. 994 */ 995 get += cc << 1; 996 if (get >= end) 997 get -= sci_rbuf_size << 1; 998 cc = 0; 999 } else { 1000 /* 1001 * Don't schedule any more receive processing 1002 * until the line discipline tells us there's 1003 * space available (through scihwiflow()). 1004 * Leave the rest of the data in the input 1005 * buffer. 1006 */ 1007 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1008 } 1009 break; 1010 } 1011 get += 2; 1012 if (get >= end) 1013 get = sc->sc_rbuf; 1014 cc--; 1015 } 1016 1017 if (cc != scc) { 1018 sc->sc_rbget = get; 1019 s = splserial(); 1020 cc = sc->sc_rbavail += scc - cc; 1021 /* Buffers should be ok again, release possible block. */ 1022 if (cc >= sc->sc_r_lowat) { 1023 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1024 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1025 SHREG_SCSCR |= SCSCR_RIE; 1026 } 1027 #if 0 1028 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1029 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1030 sci_hwiflow(sc); 1031 } 1032 #endif 1033 } 1034 splx(s); 1035 } 1036 } 1037 1038 integrate void 1039 sci_txsoft(sc, tp) 1040 struct sci_softc *sc; 1041 struct tty *tp; 1042 { 1043 1044 CLR(tp->t_state, TS_BUSY); 1045 if (ISSET(tp->t_state, TS_FLUSH)) 1046 CLR(tp->t_state, TS_FLUSH); 1047 else 1048 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1049 (*tp->t_linesw->l_start)(tp); 1050 } 1051 1052 integrate void 1053 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1054 { 1055 #if 0 1056 /* XXX (msaitoh) */ 1057 u_char msr, delta; 1058 int s; 1059 1060 s = splserial(); 1061 msr = sc->sc_msr; 1062 delta = sc->sc_msr_delta; 1063 sc->sc_msr_delta = 0; 1064 splx(s); 1065 1066 if (ISSET(delta, sc->sc_msr_dcd)) { 1067 /* 1068 * Inform the tty layer that carrier detect changed. 1069 */ 1070 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1071 } 1072 1073 if (ISSET(delta, sc->sc_msr_cts)) { 1074 /* Block or unblock output according to flow control. */ 1075 if (ISSET(msr, sc->sc_msr_cts)) { 1076 sc->sc_tx_stopped = 0; 1077 (*tp->t_linesw->l_start)(tp); 1078 } else { 1079 sc->sc_tx_stopped = 1; 1080 } 1081 } 1082 1083 #ifdef SCI_DEBUG 1084 if (sci_debug) 1085 scistatus(sc, "sci_stsoft"); 1086 #endif 1087 #endif 1088 } 1089 1090 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1091 void 1092 scisoft(void *arg) 1093 { 1094 struct sci_softc *sc = arg; 1095 struct tty *tp; 1096 1097 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1098 return; 1099 1100 { 1101 #else 1102 void 1103 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1104 scisoft() 1105 #else 1106 scisoft(void *arg) 1107 #endif 1108 { 1109 struct sci_softc *sc; 1110 struct tty *tp; 1111 int unit; 1112 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1113 int s; 1114 1115 s = splsoftserial(); 1116 sci_softintr_scheduled = 0; 1117 #endif 1118 1119 for (unit = 0; unit < sci_cd.cd_ndevs; unit++) { 1120 sc = sci_cd.cd_devs[unit]; 1121 if (sc == NULL || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK)) 1122 continue; 1123 1124 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1125 continue; 1126 1127 tp = sc->sc_tty; 1128 if (tp == NULL) 1129 continue; 1130 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1131 continue; 1132 #endif 1133 tp = sc->sc_tty; 1134 1135 if (sc->sc_rx_ready) { 1136 sc->sc_rx_ready = 0; 1137 sci_rxsoft(sc, tp); 1138 } 1139 1140 #if 0 1141 if (sc->sc_st_check) { 1142 sc->sc_st_check = 0; 1143 sci_stsoft(sc, tp); 1144 } 1145 #endif 1146 1147 if (sc->sc_tx_done) { 1148 sc->sc_tx_done = 0; 1149 sci_txsoft(sc, tp); 1150 } 1151 } 1152 1153 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1154 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1155 splx(s); 1156 #endif 1157 #endif 1158 } 1159 1160 int 1161 sciintr(void *arg) 1162 { 1163 struct sci_softc *sc = arg; 1164 u_char *put, *end; 1165 u_int cc; 1166 u_short ssr; 1167 1168 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1169 return (0); 1170 1171 end = sc->sc_ebuf; 1172 put = sc->sc_rbput; 1173 cc = sc->sc_rbavail; 1174 1175 do { 1176 ssr = SHREG_SCSSR; 1177 if (ISSET(ssr, SCSSR_FER)) { 1178 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_PER | SCSSR_FER); 1179 #if defined(DDB) || defined(KGDB) 1180 #ifdef SH4 1181 if ((SHREG_SCSPTR & SCSPTR_SPB0DT) != 0) { 1182 #else 1183 if ((SHREG_SCSPDR & SCSPDR_SCP0DT) != 0) { 1184 #endif 1185 #ifdef DDB 1186 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 1187 console_debugger(); 1188 } 1189 #endif 1190 #ifdef KGDB 1191 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) { 1192 kgdb_connect(1); 1193 } 1194 #endif 1195 } 1196 #endif /* DDB || KGDB */ 1197 } 1198 if ((SHREG_SCSSR & SCSSR_RDRF) != 0) { 1199 if (cc > 0) { 1200 put[0] = SHREG_SCRDR; 1201 put[1] = SHREG_SCSSR & 0x00ff; 1202 1203 put += 2; 1204 if (put >= end) 1205 put = sc->sc_rbuf; 1206 cc--; 1207 } 1208 1209 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1210 SCSSR_RDRF); 1211 1212 /* 1213 * Current string of incoming characters ended because 1214 * no more data was available or we ran out of space. 1215 * Schedule a receive event if any data was received. 1216 * If we're out of space, turn off receive interrupts. 1217 */ 1218 sc->sc_rbput = put; 1219 sc->sc_rbavail = cc; 1220 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1221 sc->sc_rx_ready = 1; 1222 1223 /* 1224 * See if we are in danger of overflowing a buffer. If 1225 * so, use hardware flow control to ease the pressure. 1226 */ 1227 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1228 cc < sc->sc_r_hiwat) { 1229 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1230 #if 0 1231 sci_hwiflow(sc); 1232 #endif 1233 } 1234 1235 /* 1236 * If we're out of space, disable receive interrupts 1237 * until the queue has drained a bit. 1238 */ 1239 if (!cc) { 1240 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1241 SHREG_SCSCR &= ~SCSCR_RIE; 1242 } 1243 } else { 1244 if (SHREG_SCSSR & SCSSR_RDRF) { 1245 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1246 delay(10); 1247 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 1248 continue; 1249 } 1250 } 1251 } while (SHREG_SCSSR & SCSSR_RDRF); 1252 1253 #if 0 1254 msr = bus_space_read_1(iot, ioh, sci_msr); 1255 delta = msr ^ sc->sc_msr; 1256 sc->sc_msr = msr; 1257 if (ISSET(delta, sc->sc_msr_mask)) { 1258 SET(sc->sc_msr_delta, delta); 1259 1260 /* 1261 * Pulse-per-second clock signal on edge of DCD? 1262 */ 1263 if (ISSET(delta, sc->sc_ppsmask)) { 1264 struct timeval tv; 1265 if (ISSET(msr, sc->sc_ppsmask) == 1266 sc->sc_ppsassert) { 1267 /* XXX nanotime() */ 1268 microtime(&tv); 1269 TIMEVAL_TO_TIMESPEC(&tv, 1270 &sc->ppsinfo.assert_timestamp); 1271 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1272 timespecadd(&sc->ppsinfo.assert_timestamp, 1273 &sc->ppsparam.assert_offset, 1274 &sc->ppsinfo.assert_timestamp); 1275 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1276 } 1277 1278 #ifdef PPS_SYNC 1279 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1280 hardpps(&tv, tv.tv_usec); 1281 #endif 1282 sc->ppsinfo.assert_sequence++; 1283 sc->ppsinfo.current_mode = 1284 sc->ppsparam.mode; 1285 1286 } else if (ISSET(msr, sc->sc_ppsmask) == 1287 sc->sc_ppsclear) { 1288 /* XXX nanotime() */ 1289 microtime(&tv); 1290 TIMEVAL_TO_TIMESPEC(&tv, 1291 &sc->ppsinfo.clear_timestamp); 1292 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1293 timespecadd(&sc->ppsinfo.clear_timestamp, 1294 &sc->ppsparam.clear_offset, 1295 &sc->ppsinfo.clear_timestamp); 1296 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1297 } 1298 1299 #ifdef PPS_SYNC 1300 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1301 hardpps(&tv, tv.tv_usec); 1302 #endif 1303 sc->ppsinfo.clear_sequence++; 1304 sc->ppsinfo.current_mode = 1305 sc->ppsparam.mode; 1306 } 1307 } 1308 1309 /* 1310 * Stop output immediately if we lose the output 1311 * flow control signal or carrier detect. 1312 */ 1313 if (ISSET(~msr, sc->sc_msr_mask)) { 1314 sc->sc_tbc = 0; 1315 sc->sc_heldtbc = 0; 1316 #ifdef SCI_DEBUG 1317 if (sci_debug) 1318 scistatus(sc, "sciintr "); 1319 #endif 1320 } 1321 1322 sc->sc_st_check = 1; 1323 } 1324 #endif 1325 1326 /* 1327 * Done handling any receive interrupts. See if data can be 1328 * transmitted as well. Schedule tx done event if no data left 1329 * and tty was marked busy. 1330 */ 1331 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1332 /* 1333 * If we've delayed a parameter change, do it now, and restart 1334 * output. 1335 */ 1336 if (sc->sc_heldchange) { 1337 sc->sc_heldchange = 0; 1338 sc->sc_tbc = sc->sc_heldtbc; 1339 sc->sc_heldtbc = 0; 1340 } 1341 1342 /* Output the next chunk of the contiguous buffer, if any. */ 1343 if (sc->sc_tbc > 0) { 1344 sci_putc(*(sc->sc_tba)); 1345 sc->sc_tba++; 1346 sc->sc_tbc--; 1347 } else { 1348 /* Disable transmit completion interrupts if necessary. */ 1349 #if 0 1350 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1351 #endif 1352 SHREG_SCSCR &= ~SCSCR_TIE; 1353 1354 if (sc->sc_tx_busy) { 1355 sc->sc_tx_busy = 0; 1356 sc->sc_tx_done = 1; 1357 } 1358 } 1359 } 1360 1361 /* Wake up the poller. */ 1362 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1363 softintr_schedule(sc->sc_si); 1364 #else 1365 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1366 setsoftserial(); 1367 #else 1368 if (!sci_softintr_scheduled) { 1369 sci_softintr_scheduled = 1; 1370 callout_reset(&sci_soft_ch, 1, scisoft, 1); 1371 } 1372 #endif 1373 #endif 1374 1375 #if NRND > 0 && defined(RND_SCI) 1376 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1377 #endif 1378 1379 return (1); 1380 } 1381 1382 void 1383 scicnprobe(cp) 1384 struct consdev *cp; 1385 { 1386 int maj; 1387 1388 /* locate the major number */ 1389 maj = cdevsw_lookup_major(&sci_cdevsw); 1390 1391 /* Initialize required fields. */ 1392 cp->cn_dev = makedev(maj, 0); 1393 #ifdef SCICONSOLE 1394 cp->cn_pri = CN_REMOTE; 1395 #else 1396 cp->cn_pri = CN_NORMAL; 1397 #endif 1398 } 1399 1400 void 1401 scicninit(struct consdev *cp) 1402 { 1403 1404 InitializeSci(scicn_speed); 1405 sciisconsole = 1; 1406 } 1407 1408 int 1409 scicngetc(dev_t dev) 1410 { 1411 int c; 1412 int s; 1413 1414 s = splserial(); 1415 c = sci_getc(); 1416 splx(s); 1417 1418 return (c); 1419 } 1420 1421 void 1422 scicnputc(dev_t dev, int c) 1423 { 1424 int s; 1425 1426 s = splserial(); 1427 sci_putc((u_char)c); 1428 splx(s); 1429 } 1430
Indexes created Mon Sep 22 13:09:51 GMT 2025