sci.c revision 1.35
1 /* $NetBSD: sci.c,v 1.35 2003/08/07 16:29:28 agc 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 1.35 2003/08/07 16:29:28 agc 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 dev_type_open(sciopen); 265 dev_type_close(sciclose); 266 dev_type_read(sciread); 267 dev_type_write(sciwrite); 268 dev_type_ioctl(sciioctl); 269 dev_type_stop(scistop); 270 dev_type_tty(scitty); 271 dev_type_poll(scipoll); 272 273 const struct cdevsw sci_cdevsw = { 274 sciopen, sciclose, sciread, sciwrite, sciioctl, 275 scistop, scitty, scipoll, nommap, ttykqfilter, D_TTY 276 }; 277 278 void InitializeSci (unsigned int); 279 280 /* 281 * following functions are debugging prupose only 282 */ 283 #define CR 0x0D 284 #define I2C_ADRS (*(volatile unsigned int *)0xa8000000) 285 #define USART_ON (unsigned int)~0x08 286 287 void sci_putc(unsigned char); 288 unsigned char sci_getc(void); 289 int SciErrCheck(void); 290 291 /* 292 * InitializeSci 293 * : unsigned int bps; 294 * : SCI(Serial Communication Interface) 295 */ 296 297 void 298 InitializeSci(unsigned int bps) 299 { 300 301 /* Initialize SCR */ 302 SHREG_SCSCR = 0x00; 303 304 /* Serial Mode Register */ 305 SHREG_SCSMR = 0x00; /* Async,8bit,NonParity,Even,1Stop,NoMulti */ 306 307 /* Bit Rate Register */ 308 SHREG_SCBRR = divrnd(sh_clock_get_pclock(), 32 * bps) - 1; 309 310 /* 311 * wait 1mSec, because Send/Recv must begin 1 bit period after 312 * BRR is set. 313 */ 314 delay(1000); 315 316 /* Send permission, Receive permission ON */ 317 SHREG_SCSCR = SCSCR_TE | SCSCR_RE; 318 319 /* Serial Status Register */ 320 SHREG_SCSSR &= SCSSR_TDRE; /* Clear Status */ 321 322 #if 0 323 I2C_ADRS &= ~0x08; /* enable RS-232C */ 324 #endif 325 } 326 327 328 /* 329 * sci_putc 330 * : unsigned char c; 331 */ 332 void 333 sci_putc(unsigned char c) 334 { 335 336 /* wait for ready */ 337 while ((SHREG_SCSSR & SCSSR_TDRE) == NULL) 338 ; 339 340 /* write send data to send register */ 341 SHREG_SCTDR = c; 342 343 /* clear ready flag */ 344 SHREG_SCSSR &= ~SCSSR_TDRE; 345 } 346 347 /* 348 * : SciErrCheck 349 * 0x20 = over run 350 * 0x10 = frame error 351 * 0x80 = parity error 352 */ 353 int 354 SciErrCheck(void) 355 { 356 357 return(SHREG_SCSSR & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)); 358 } 359 360 /* 361 * sci_getc 362 */ 363 unsigned char 364 sci_getc(void) 365 { 366 unsigned char c, err_c; 367 368 while (((err_c = SHREG_SCSSR) 369 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) == 0) 370 ; 371 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 372 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 373 return(err_c |= 0x80); 374 } 375 376 c = SHREG_SCRDR; 377 378 SHREG_SCSSR &= ~SCSSR_RDRF; 379 380 return(c); 381 } 382 383 #if 0 384 #define SCI_MAX_UNITS 2 385 #else 386 #define SCI_MAX_UNITS 1 387 #endif 388 389 390 static int 391 sci_match(struct device *parent, struct cfdata *cfp, void *aux) 392 { 393 394 if (strcmp(cfp->cf_name, "sci") 395 || cfp->cf_unit >= SCI_MAX_UNITS) //XXX __BROKEN_CONFIG_UNIT_USAGE 396 return 0; 397 398 return 1; 399 } 400 401 static void 402 sci_attach(struct device *parent, struct device *self, void *aux) 403 { 404 struct sci_softc *sc = (struct sci_softc *)self; 405 struct tty *tp; 406 407 sc->sc_hwflags = 0; /* XXX */ 408 sc->sc_swflags = 0; /* XXX */ 409 sc->sc_fifolen = 0; /* XXX */ 410 411 if (sciisconsole) { 412 SET(sc->sc_hwflags, SCI_HW_CONSOLE); 413 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 414 printf("\n%s: console\n", sc->sc_dev.dv_xname); 415 } else { 416 InitializeSci(9600); 417 printf("\n"); 418 } 419 420 callout_init(&sc->sc_diag_ch); 421 422 intc_intr_establish(SH_INTEVT_SCI_ERI, IST_LEVEL, IPL_SERIAL, sciintr, 423 sc); 424 intc_intr_establish(SH_INTEVT_SCI_RXI, IST_LEVEL, IPL_SERIAL, sciintr, 425 sc); 426 intc_intr_establish(SH_INTEVT_SCI_TXI, IST_LEVEL, IPL_SERIAL, sciintr, 427 sc); 428 intc_intr_establish(SH_INTEVT_SCI_TEI, IST_LEVEL, IPL_SERIAL, sciintr, 429 sc); 430 431 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 432 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, scisoft, sc); 433 #endif 434 SET(sc->sc_hwflags, SCI_HW_DEV_OK); 435 436 tp = ttymalloc(); 437 tp->t_oproc = scistart; 438 tp->t_param = sciparam; 439 tp->t_hwiflow = NULL; 440 441 sc->sc_tty = tp; 442 sc->sc_rbuf = malloc(sci_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 443 if (sc->sc_rbuf == NULL) { 444 printf("%s: unable to allocate ring buffer\n", 445 sc->sc_dev.dv_xname); 446 return; 447 } 448 sc->sc_ebuf = sc->sc_rbuf + (sci_rbuf_size << 1); 449 450 tty_attach(tp); 451 } 452 453 /* 454 * Start or restart transmission. 455 */ 456 static void 457 scistart(struct tty *tp) 458 { 459 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 460 int s; 461 462 s = spltty(); 463 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 464 goto out; 465 if (sc->sc_tx_stopped) 466 goto out; 467 468 if (tp->t_outq.c_cc <= tp->t_lowat) { 469 if (ISSET(tp->t_state, TS_ASLEEP)) { 470 CLR(tp->t_state, TS_ASLEEP); 471 wakeup(&tp->t_outq); 472 } 473 selwakeup(&tp->t_wsel); 474 if (tp->t_outq.c_cc == 0) 475 goto out; 476 } 477 478 /* Grab the first contiguous region of buffer space. */ 479 { 480 u_char *tba; 481 int tbc; 482 483 tba = tp->t_outq.c_cf; 484 tbc = ndqb(&tp->t_outq, 0); 485 486 (void)splserial(); 487 488 sc->sc_tba = tba; 489 sc->sc_tbc = tbc; 490 } 491 492 SET(tp->t_state, TS_BUSY); 493 sc->sc_tx_busy = 1; 494 495 /* Enable transmit completion interrupts if necessary. */ 496 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 497 498 /* Output the first byte of the contiguous buffer. */ 499 { 500 if (sc->sc_tbc > 0) { 501 sci_putc(*(sc->sc_tba)); 502 sc->sc_tba++; 503 sc->sc_tbc--; 504 } 505 } 506 out: 507 splx(s); 508 return; 509 } 510 511 /* 512 * Set SCI tty parameters from termios. 513 * XXX - Should just copy the whole termios after 514 * making sure all the changes could be done. 515 */ 516 static int 517 sciparam(struct tty *tp, struct termios *t) 518 { 519 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 520 int ospeed = t->c_ospeed; 521 int s; 522 523 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 524 return (EIO); 525 526 /* Check requested parameters. */ 527 if (ospeed < 0) 528 return (EINVAL); 529 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 530 return (EINVAL); 531 532 /* 533 * For the console, always force CLOCAL and !HUPCL, so that the port 534 * is always active. 535 */ 536 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 537 ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 538 SET(t->c_cflag, CLOCAL); 539 CLR(t->c_cflag, HUPCL); 540 } 541 542 /* 543 * If there were no changes, don't do anything. This avoids dropping 544 * input and improves performance when all we did was frob things like 545 * VMIN and VTIME. 546 */ 547 if (tp->t_ospeed == t->c_ospeed && 548 tp->t_cflag == t->c_cflag) 549 return (0); 550 551 #if 0 552 /* XXX (msaitoh) */ 553 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 554 #endif 555 556 s = splserial(); 557 558 /* 559 * Set the FIFO threshold based on the receive speed. 560 * 561 * * If it's a low speed, it's probably a mouse or some other 562 * interactive device, so set the threshold low. 563 * * If it's a high speed, trim the trigger level down to prevent 564 * overflows. 565 * * Otherwise set it a bit higher. 566 */ 567 #if 0 568 /* XXX (msaitoh) */ 569 if (ISSET(sc->sc_hwflags, SCI_HW_HAYESP)) 570 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 571 else if (ISSET(sc->sc_hwflags, SCI_HW_FIFO)) 572 sc->sc_fifo = FIFO_ENABLE | 573 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 574 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 575 else 576 sc->sc_fifo = 0; 577 #endif 578 579 /* And copy to tty. */ 580 tp->t_ispeed = 0; 581 tp->t_ospeed = t->c_ospeed; 582 tp->t_cflag = t->c_cflag; 583 584 if (!sc->sc_heldchange) { 585 if (sc->sc_tx_busy) { 586 sc->sc_heldtbc = sc->sc_tbc; 587 sc->sc_tbc = 0; 588 sc->sc_heldchange = 1; 589 } 590 #if 0 591 /* XXX (msaitoh) */ 592 else 593 sci_loadchannelregs(sc); 594 #endif 595 } 596 597 if (!ISSET(t->c_cflag, CHWFLOW)) { 598 /* Disable the high water mark. */ 599 sc->sc_r_hiwat = 0; 600 sc->sc_r_lowat = 0; 601 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 602 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 603 sci_schedrx(sc); 604 } 605 } else { 606 sc->sc_r_hiwat = sci_rbuf_hiwat; 607 sc->sc_r_lowat = sci_rbuf_lowat; 608 } 609 610 splx(s); 611 612 #ifdef SCI_DEBUG 613 if (sci_debug) 614 scistatus(sc, "sciparam "); 615 #endif 616 617 if (!ISSET(t->c_cflag, CHWFLOW)) { 618 if (sc->sc_tx_stopped) { 619 sc->sc_tx_stopped = 0; 620 scistart(tp); 621 } 622 } 623 624 return (0); 625 } 626 627 void 628 sci_iflush(struct sci_softc *sc) 629 { 630 unsigned char err_c; 631 volatile unsigned char c; 632 633 if (((err_c = SHREG_SCSSR) 634 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 635 636 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 637 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 638 return; 639 } 640 641 c = SHREG_SCRDR; 642 643 SHREG_SCSSR &= ~SCSSR_RDRF; 644 } 645 } 646 647 int 648 sciopen(dev_t dev, int flag, int mode, struct proc *p) 649 { 650 int unit = SCIUNIT(dev); 651 struct sci_softc *sc; 652 struct tty *tp; 653 int s, s2; 654 int error; 655 656 if (unit >= sci_cd.cd_ndevs) 657 return (ENXIO); 658 sc = sci_cd.cd_devs[unit]; 659 if (sc == 0 || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK) || 660 sc->sc_rbuf == NULL) 661 return (ENXIO); 662 663 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 664 return (ENXIO); 665 666 #ifdef KGDB 667 /* 668 * If this is the kgdb port, no other use is permitted. 669 */ 670 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) 671 return (EBUSY); 672 #endif 673 674 tp = sc->sc_tty; 675 676 if (ISSET(tp->t_state, TS_ISOPEN) && 677 ISSET(tp->t_state, TS_XCLUDE) && 678 p->p_ucred->cr_uid != 0) 679 return (EBUSY); 680 681 s = spltty(); 682 683 /* 684 * Do the following iff this is a first open. 685 */ 686 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 687 struct termios t; 688 689 tp->t_dev = dev; 690 691 s2 = splserial(); 692 693 /* Turn on interrupts. */ 694 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 695 696 splx(s2); 697 698 /* 699 * Initialize the termios status to the defaults. Add in the 700 * sticky bits from TIOCSFLAGS. 701 */ 702 t.c_ispeed = 0; 703 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 704 t.c_ospeed = scicn_speed; 705 t.c_cflag = sciconscflag; 706 } else { 707 t.c_ospeed = TTYDEF_SPEED; 708 t.c_cflag = TTYDEF_CFLAG; 709 } 710 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 711 SET(t.c_cflag, CLOCAL); 712 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 713 SET(t.c_cflag, CRTSCTS); 714 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 715 SET(t.c_cflag, MDMBUF); 716 /* Make sure sciparam() will do something. */ 717 tp->t_ospeed = 0; 718 (void) sciparam(tp, &t); 719 tp->t_iflag = TTYDEF_IFLAG; 720 tp->t_oflag = TTYDEF_OFLAG; 721 tp->t_lflag = TTYDEF_LFLAG; 722 ttychars(tp); 723 ttsetwater(tp); 724 725 s2 = splserial(); 726 727 /* Clear the input ring, and unblock. */ 728 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 729 sc->sc_rbavail = sci_rbuf_size; 730 sci_iflush(sc); 731 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 732 #if 0 733 /* XXX (msaitoh) */ 734 sci_hwiflow(sc); 735 #endif 736 737 #ifdef SCI_DEBUG 738 if (sci_debug) 739 scistatus(sc, "sciopen "); 740 #endif 741 742 splx(s2); 743 } 744 745 splx(s); 746 747 error = ttyopen(tp, SCIDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 748 if (error) 749 goto bad; 750 751 error = (*tp->t_linesw->l_open)(dev, tp); 752 if (error) 753 goto bad; 754 755 return (0); 756 757 bad: 758 759 return (error); 760 } 761 762 int 763 sciclose(dev_t dev, int flag, int mode, struct proc *p) 764 { 765 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 766 struct tty *tp = sc->sc_tty; 767 768 /* XXX This is for cons.c. */ 769 if (!ISSET(tp->t_state, TS_ISOPEN)) 770 return (0); 771 772 (*tp->t_linesw->l_close)(tp, flag); 773 ttyclose(tp); 774 775 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 776 return (0); 777 778 return (0); 779 } 780 781 int 782 sciread(dev_t dev, struct uio *uio, int flag) 783 { 784 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 785 struct tty *tp = sc->sc_tty; 786 787 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 788 } 789 790 int 791 sciwrite(dev_t dev, struct uio *uio, int flag) 792 { 793 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 794 struct tty *tp = sc->sc_tty; 795 796 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 797 } 798 799 int 800 scipoll(dev_t dev, int events, struct proc *p) 801 { 802 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 803 struct tty *tp = sc->sc_tty; 804 805 return ((*tp->t_linesw->l_poll)(tp, events, p)); 806 } 807 808 struct tty * 809 scitty(dev_t dev) 810 { 811 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 812 struct tty *tp = sc->sc_tty; 813 814 return (tp); 815 } 816 817 int 818 sciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 819 { 820 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 821 struct tty *tp = sc->sc_tty; 822 int error; 823 int s; 824 825 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 826 return (EIO); 827 828 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 829 if (error != EPASSTHROUGH) 830 return (error); 831 832 error = ttioctl(tp, cmd, data, flag, p); 833 if (error != EPASSTHROUGH) 834 return (error); 835 836 error = 0; 837 838 s = splserial(); 839 840 switch (cmd) { 841 case TIOCSBRK: 842 sci_break(sc, 1); 843 break; 844 845 case TIOCCBRK: 846 sci_break(sc, 0); 847 break; 848 849 case TIOCGFLAGS: 850 *(int *)data = sc->sc_swflags; 851 break; 852 853 case TIOCSFLAGS: 854 error = suser(p->p_ucred, &p->p_acflag); 855 if (error) 856 break; 857 sc->sc_swflags = *(int *)data; 858 break; 859 860 default: 861 error = EPASSTHROUGH; 862 break; 863 } 864 865 splx(s); 866 867 return (error); 868 } 869 870 integrate void 871 sci_schedrx(struct sci_softc *sc) 872 { 873 874 sc->sc_rx_ready = 1; 875 876 /* Wake up the poller. */ 877 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 878 softintr_schedule(sc->sc_si); 879 #else 880 #ifndef __NO_SOFT_SERIAL_INTERRUPT 881 setsoftserial(); 882 #else 883 if (!sci_softintr_scheduled) { 884 sci_softintr_scheduled = 1; 885 callout_reset(&sci_soft_ch, 1, scisoft, NULL); 886 } 887 #endif 888 #endif 889 } 890 891 void 892 sci_break(struct sci_softc *sc, int onoff) 893 { 894 895 if (onoff) 896 SHREG_SCSSR &= ~SCSSR_TDRE; 897 else 898 SHREG_SCSSR |= SCSSR_TDRE; 899 900 #if 0 /* XXX */ 901 if (!sc->sc_heldchange) { 902 if (sc->sc_tx_busy) { 903 sc->sc_heldtbc = sc->sc_tbc; 904 sc->sc_tbc = 0; 905 sc->sc_heldchange = 1; 906 } else 907 sci_loadchannelregs(sc); 908 } 909 #endif 910 } 911 912 /* 913 * Stop output, e.g., for ^S or output flush. 914 */ 915 void 916 scistop(struct tty *tp, int flag) 917 { 918 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 919 int s; 920 921 s = splserial(); 922 if (ISSET(tp->t_state, TS_BUSY)) { 923 /* Stop transmitting at the next chunk. */ 924 sc->sc_tbc = 0; 925 sc->sc_heldtbc = 0; 926 if (!ISSET(tp->t_state, TS_TTSTOP)) 927 SET(tp->t_state, TS_FLUSH); 928 } 929 splx(s); 930 } 931 932 void 933 scidiag(void *arg) 934 { 935 struct sci_softc *sc = arg; 936 int overflows, floods; 937 int s; 938 939 s = splserial(); 940 overflows = sc->sc_overflows; 941 sc->sc_overflows = 0; 942 floods = sc->sc_floods; 943 sc->sc_floods = 0; 944 sc->sc_errors = 0; 945 splx(s); 946 947 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 948 sc->sc_dev.dv_xname, 949 overflows, overflows == 1 ? "" : "s", 950 floods, floods == 1 ? "" : "s"); 951 } 952 953 integrate void 954 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 955 { 956 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 957 u_char *get, *end; 958 u_int cc, scc; 959 u_char ssr; 960 int code; 961 int s; 962 963 end = sc->sc_ebuf; 964 get = sc->sc_rbget; 965 scc = cc = sci_rbuf_size - sc->sc_rbavail; 966 967 if (cc == sci_rbuf_size) { 968 sc->sc_floods++; 969 if (sc->sc_errors++ == 0) 970 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 971 } 972 973 while (cc) { 974 code = get[0]; 975 ssr = get[1]; 976 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 977 if (ISSET(ssr, SCSSR_FER)) 978 SET(code, TTY_FE); 979 if (ISSET(ssr, SCSSR_PER)) 980 SET(code, TTY_PE); 981 } 982 if ((*rint)(code, tp) == -1) { 983 /* 984 * The line discipline's buffer is out of space. 985 */ 986 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 987 /* 988 * We're either not using flow control, or the 989 * line discipline didn't tell us to block for 990 * some reason. Either way, we have no way to 991 * know when there's more space available, so 992 * just drop the rest of the data. 993 */ 994 get += cc << 1; 995 if (get >= end) 996 get -= sci_rbuf_size << 1; 997 cc = 0; 998 } else { 999 /* 1000 * Don't schedule any more receive processing 1001 * until the line discipline tells us there's 1002 * space available (through scihwiflow()). 1003 * Leave the rest of the data in the input 1004 * buffer. 1005 */ 1006 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1007 } 1008 break; 1009 } 1010 get += 2; 1011 if (get >= end) 1012 get = sc->sc_rbuf; 1013 cc--; 1014 } 1015 1016 if (cc != scc) { 1017 sc->sc_rbget = get; 1018 s = splserial(); 1019 cc = sc->sc_rbavail += scc - cc; 1020 /* Buffers should be ok again, release possible block. */ 1021 if (cc >= sc->sc_r_lowat) { 1022 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1023 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1024 SHREG_SCSCR |= SCSCR_RIE; 1025 } 1026 #if 0 1027 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1028 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1029 sci_hwiflow(sc); 1030 } 1031 #endif 1032 } 1033 splx(s); 1034 } 1035 } 1036 1037 integrate void 1038 sci_txsoft(sc, tp) 1039 struct sci_softc *sc; 1040 struct tty *tp; 1041 { 1042 1043 CLR(tp->t_state, TS_BUSY); 1044 if (ISSET(tp->t_state, TS_FLUSH)) 1045 CLR(tp->t_state, TS_FLUSH); 1046 else 1047 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1048 (*tp->t_linesw->l_start)(tp); 1049 } 1050 1051 integrate void 1052 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1053 { 1054 #if 0 1055 /* XXX (msaitoh) */ 1056 u_char msr, delta; 1057 int s; 1058 1059 s = splserial(); 1060 msr = sc->sc_msr; 1061 delta = sc->sc_msr_delta; 1062 sc->sc_msr_delta = 0; 1063 splx(s); 1064 1065 if (ISSET(delta, sc->sc_msr_dcd)) { 1066 /* 1067 * Inform the tty layer that carrier detect changed. 1068 */ 1069 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1070 } 1071 1072 if (ISSET(delta, sc->sc_msr_cts)) { 1073 /* Block or unblock output according to flow control. */ 1074 if (ISSET(msr, sc->sc_msr_cts)) { 1075 sc->sc_tx_stopped = 0; 1076 (*tp->t_linesw->l_start)(tp); 1077 } else { 1078 sc->sc_tx_stopped = 1; 1079 } 1080 } 1081 1082 #ifdef SCI_DEBUG 1083 if (sci_debug) 1084 scistatus(sc, "sci_stsoft"); 1085 #endif 1086 #endif 1087 } 1088 1089 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1090 void 1091 scisoft(void *arg) 1092 { 1093 struct sci_softc *sc = arg; 1094 struct tty *tp; 1095 1096 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1097 return; 1098 1099 { 1100 #else 1101 void 1102 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1103 scisoft() 1104 #else 1105 scisoft(void *arg) 1106 #endif 1107 { 1108 struct sci_softc *sc; 1109 struct tty *tp; 1110 int unit; 1111 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1112 int s; 1113 1114 s = splsoftserial(); 1115 sci_softintr_scheduled = 0; 1116 #endif 1117 1118 for (unit = 0; unit < sci_cd.cd_ndevs; unit++) { 1119 sc = sci_cd.cd_devs[unit]; 1120 if (sc == NULL || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK)) 1121 continue; 1122 1123 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1124 continue; 1125 1126 tp = sc->sc_tty; 1127 if (tp == NULL) 1128 continue; 1129 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1130 continue; 1131 #endif 1132 tp = sc->sc_tty; 1133 1134 if (sc->sc_rx_ready) { 1135 sc->sc_rx_ready = 0; 1136 sci_rxsoft(sc, tp); 1137 } 1138 1139 #if 0 1140 if (sc->sc_st_check) { 1141 sc->sc_st_check = 0; 1142 sci_stsoft(sc, tp); 1143 } 1144 #endif 1145 1146 if (sc->sc_tx_done) { 1147 sc->sc_tx_done = 0; 1148 sci_txsoft(sc, tp); 1149 } 1150 } 1151 1152 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1153 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1154 splx(s); 1155 #endif 1156 #endif 1157 } 1158 1159 int 1160 sciintr(void *arg) 1161 { 1162 struct sci_softc *sc = arg; 1163 u_char *put, *end; 1164 u_int cc; 1165 u_short ssr; 1166 1167 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1168 return (0); 1169 1170 end = sc->sc_ebuf; 1171 put = sc->sc_rbput; 1172 cc = sc->sc_rbavail; 1173 1174 do { 1175 ssr = SHREG_SCSSR; 1176 if (ISSET(ssr, SCSSR_FER)) { 1177 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_PER | SCSSR_FER); 1178 #if defined(DDB) || defined(KGDB) 1179 #ifdef SH4 1180 if ((SHREG_SCSPTR & SCSPTR_SPB0DT) != 0) { 1181 #else 1182 if ((SHREG_SCSPDR & SCSPDR_SCP0DT) != 0) { 1183 #endif 1184 #ifdef DDB 1185 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 1186 console_debugger(); 1187 } 1188 #endif 1189 #ifdef KGDB 1190 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) { 1191 kgdb_connect(1); 1192 } 1193 #endif 1194 } 1195 #endif /* DDB || KGDB */ 1196 } 1197 if ((SHREG_SCSSR & SCSSR_RDRF) != 0) { 1198 if (cc > 0) { 1199 put[0] = SHREG_SCRDR; 1200 put[1] = SHREG_SCSSR & 0x00ff; 1201 1202 put += 2; 1203 if (put >= end) 1204 put = sc->sc_rbuf; 1205 cc--; 1206 } 1207 1208 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1209 SCSSR_RDRF); 1210 1211 /* 1212 * Current string of incoming characters ended because 1213 * no more data was available or we ran out of space. 1214 * Schedule a receive event if any data was received. 1215 * If we're out of space, turn off receive interrupts. 1216 */ 1217 sc->sc_rbput = put; 1218 sc->sc_rbavail = cc; 1219 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1220 sc->sc_rx_ready = 1; 1221 1222 /* 1223 * See if we are in danger of overflowing a buffer. If 1224 * so, use hardware flow control to ease the pressure. 1225 */ 1226 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1227 cc < sc->sc_r_hiwat) { 1228 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1229 #if 0 1230 sci_hwiflow(sc); 1231 #endif 1232 } 1233 1234 /* 1235 * If we're out of space, disable receive interrupts 1236 * until the queue has drained a bit. 1237 */ 1238 if (!cc) { 1239 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1240 SHREG_SCSCR &= ~SCSCR_RIE; 1241 } 1242 } else { 1243 if (SHREG_SCSSR & SCSSR_RDRF) { 1244 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1245 delay(10); 1246 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 1247 continue; 1248 } 1249 } 1250 } while (SHREG_SCSSR & SCSSR_RDRF); 1251 1252 #if 0 1253 msr = bus_space_read_1(iot, ioh, sci_msr); 1254 delta = msr ^ sc->sc_msr; 1255 sc->sc_msr = msr; 1256 if (ISSET(delta, sc->sc_msr_mask)) { 1257 SET(sc->sc_msr_delta, delta); 1258 1259 /* 1260 * Pulse-per-second clock signal on edge of DCD? 1261 */ 1262 if (ISSET(delta, sc->sc_ppsmask)) { 1263 struct timeval tv; 1264 if (ISSET(msr, sc->sc_ppsmask) == 1265 sc->sc_ppsassert) { 1266 /* XXX nanotime() */ 1267 microtime(&tv); 1268 TIMEVAL_TO_TIMESPEC(&tv, 1269 &sc->ppsinfo.assert_timestamp); 1270 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1271 timespecadd(&sc->ppsinfo.assert_timestamp, 1272 &sc->ppsparam.assert_offset, 1273 &sc->ppsinfo.assert_timestamp); 1274 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1275 } 1276 1277 #ifdef PPS_SYNC 1278 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1279 hardpps(&tv, tv.tv_usec); 1280 #endif 1281 sc->ppsinfo.assert_sequence++; 1282 sc->ppsinfo.current_mode = 1283 sc->ppsparam.mode; 1284 1285 } else if (ISSET(msr, sc->sc_ppsmask) == 1286 sc->sc_ppsclear) { 1287 /* XXX nanotime() */ 1288 microtime(&tv); 1289 TIMEVAL_TO_TIMESPEC(&tv, 1290 &sc->ppsinfo.clear_timestamp); 1291 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1292 timespecadd(&sc->ppsinfo.clear_timestamp, 1293 &sc->ppsparam.clear_offset, 1294 &sc->ppsinfo.clear_timestamp); 1295 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1296 } 1297 1298 #ifdef PPS_SYNC 1299 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1300 hardpps(&tv, tv.tv_usec); 1301 #endif 1302 sc->ppsinfo.clear_sequence++; 1303 sc->ppsinfo.current_mode = 1304 sc->ppsparam.mode; 1305 } 1306 } 1307 1308 /* 1309 * Stop output immediately if we lose the output 1310 * flow control signal or carrier detect. 1311 */ 1312 if (ISSET(~msr, sc->sc_msr_mask)) { 1313 sc->sc_tbc = 0; 1314 sc->sc_heldtbc = 0; 1315 #ifdef SCI_DEBUG 1316 if (sci_debug) 1317 scistatus(sc, "sciintr "); 1318 #endif 1319 } 1320 1321 sc->sc_st_check = 1; 1322 } 1323 #endif 1324 1325 /* 1326 * Done handling any receive interrupts. See if data can be 1327 * transmitted as well. Schedule tx done event if no data left 1328 * and tty was marked busy. 1329 */ 1330 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1331 /* 1332 * If we've delayed a parameter change, do it now, and restart 1333 * output. 1334 */ 1335 if (sc->sc_heldchange) { 1336 sc->sc_heldchange = 0; 1337 sc->sc_tbc = sc->sc_heldtbc; 1338 sc->sc_heldtbc = 0; 1339 } 1340 1341 /* Output the next chunk of the contiguous buffer, if any. */ 1342 if (sc->sc_tbc > 0) { 1343 sci_putc(*(sc->sc_tba)); 1344 sc->sc_tba++; 1345 sc->sc_tbc--; 1346 } else { 1347 /* Disable transmit completion interrupts if necessary. */ 1348 #if 0 1349 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1350 #endif 1351 SHREG_SCSCR &= ~SCSCR_TIE; 1352 1353 if (sc->sc_tx_busy) { 1354 sc->sc_tx_busy = 0; 1355 sc->sc_tx_done = 1; 1356 } 1357 } 1358 } 1359 1360 /* Wake up the poller. */ 1361 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1362 softintr_schedule(sc->sc_si); 1363 #else 1364 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1365 setsoftserial(); 1366 #else 1367 if (!sci_softintr_scheduled) { 1368 sci_softintr_scheduled = 1; 1369 callout_reset(&sci_soft_ch, 1, scisoft, 1); 1370 } 1371 #endif 1372 #endif 1373 1374 #if NRND > 0 && defined(RND_SCI) 1375 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1376 #endif 1377 1378 return (1); 1379 } 1380 1381 void 1382 scicnprobe(cp) 1383 struct consdev *cp; 1384 { 1385 int maj; 1386 1387 /* locate the major number */ 1388 maj = cdevsw_lookup_major(&sci_cdevsw); 1389 1390 /* Initialize required fields. */ 1391 cp->cn_dev = makedev(maj, 0); 1392 #ifdef SCICONSOLE 1393 cp->cn_pri = CN_REMOTE; 1394 #else 1395 cp->cn_pri = CN_NORMAL; 1396 #endif 1397 } 1398 1399 void 1400 scicninit(struct consdev *cp) 1401 { 1402 1403 InitializeSci(scicn_speed); 1404 sciisconsole = 1; 1405 } 1406 1407 int 1408 scicngetc(dev_t dev) 1409 { 1410 int c; 1411 int s; 1412 1413 s = splserial(); 1414 c = sci_getc(); 1415 splx(s); 1416 1417 return (c); 1418 } 1419 1420 void 1421 scicnputc(dev_t dev, int c) 1422 { 1423 int s; 1424 1425 s = splserial(); 1426 sci_putc((u_char)c); 1427 splx(s); 1428 } 1429
Indexes created Wed Sep 24 05:09:52 GMT 2025