sci.c revision 1.28
1 /* $NetBSD: sci.c,v 1.28 2002/09/06 13:18:43 gehenna 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 struct cfattach sci_ca = { 261 sizeof(struct sci_softc), sci_match, sci_attach 262 }; 263 264 extern struct cfdriver sci_cd; 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, 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) == NULL) 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 #if 0 386 #define SCI_MAX_UNITS 2 387 #else 388 #define SCI_MAX_UNITS 1 389 #endif 390 391 392 static int 393 sci_match(struct device *parent, struct cfdata *cfp, void *aux) 394 { 395 396 if (strcmp(cfp->cf_driver->cd_name, "sci") 397 || cfp->cf_unit >= SCI_MAX_UNITS) //XXX __BROKEN_CONFIG_UNIT_USAGE 398 return 0; 399 400 return 1; 401 } 402 403 static void 404 sci_attach(struct device *parent, struct device *self, void *aux) 405 { 406 struct sci_softc *sc = (struct sci_softc *)self; 407 struct tty *tp; 408 409 sc->sc_hwflags = 0; /* XXX */ 410 sc->sc_swflags = 0; /* XXX */ 411 sc->sc_fifolen = 0; /* XXX */ 412 413 if (sciisconsole) { 414 SET(sc->sc_hwflags, SCI_HW_CONSOLE); 415 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 416 printf("\n%s: console\n", sc->sc_dev.dv_xname); 417 } else { 418 InitializeSci(9600); 419 printf("\n"); 420 } 421 422 callout_init(&sc->sc_diag_ch); 423 424 intc_intr_establish(SH_INTEVT_SCI_ERI, IST_LEVEL, IPL_SERIAL, sciintr, 425 sc); 426 intc_intr_establish(SH_INTEVT_SCI_RXI, IST_LEVEL, IPL_SERIAL, sciintr, 427 sc); 428 intc_intr_establish(SH_INTEVT_SCI_TXI, IST_LEVEL, IPL_SERIAL, sciintr, 429 sc); 430 intc_intr_establish(SH_INTEVT_SCI_TEI, IST_LEVEL, IPL_SERIAL, sciintr, 431 sc); 432 433 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 434 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, scisoft, sc); 435 #endif 436 SET(sc->sc_hwflags, SCI_HW_DEV_OK); 437 438 tp = ttymalloc(); 439 tp->t_oproc = scistart; 440 tp->t_param = sciparam; 441 tp->t_hwiflow = NULL; 442 443 sc->sc_tty = tp; 444 sc->sc_rbuf = malloc(sci_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 445 if (sc->sc_rbuf == NULL) { 446 printf("%s: unable to allocate ring buffer\n", 447 sc->sc_dev.dv_xname); 448 return; 449 } 450 sc->sc_ebuf = sc->sc_rbuf + (sci_rbuf_size << 1); 451 452 tty_attach(tp); 453 } 454 455 /* 456 * Start or restart transmission. 457 */ 458 static void 459 scistart(struct tty *tp) 460 { 461 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 462 int s; 463 464 s = spltty(); 465 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 466 goto out; 467 if (sc->sc_tx_stopped) 468 goto out; 469 470 if (tp->t_outq.c_cc <= tp->t_lowat) { 471 if (ISSET(tp->t_state, TS_ASLEEP)) { 472 CLR(tp->t_state, TS_ASLEEP); 473 wakeup(&tp->t_outq); 474 } 475 selwakeup(&tp->t_wsel); 476 if (tp->t_outq.c_cc == 0) 477 goto out; 478 } 479 480 /* Grab the first contiguous region of buffer space. */ 481 { 482 u_char *tba; 483 int tbc; 484 485 tba = tp->t_outq.c_cf; 486 tbc = ndqb(&tp->t_outq, 0); 487 488 (void)splserial(); 489 490 sc->sc_tba = tba; 491 sc->sc_tbc = tbc; 492 } 493 494 SET(tp->t_state, TS_BUSY); 495 sc->sc_tx_busy = 1; 496 497 /* Enable transmit completion interrupts if necessary. */ 498 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 499 500 /* Output the first byte of the contiguous buffer. */ 501 { 502 if (sc->sc_tbc > 0) { 503 sci_putc(*(sc->sc_tba)); 504 sc->sc_tba++; 505 sc->sc_tbc--; 506 } 507 } 508 out: 509 splx(s); 510 return; 511 } 512 513 /* 514 * Set SCI tty parameters from termios. 515 * XXX - Should just copy the whole termios after 516 * making sure all the changes could be done. 517 */ 518 static int 519 sciparam(struct tty *tp, struct termios *t) 520 { 521 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 522 int ospeed = t->c_ospeed; 523 int s; 524 525 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 526 return (EIO); 527 528 /* Check requested parameters. */ 529 if (ospeed < 0) 530 return (EINVAL); 531 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 532 return (EINVAL); 533 534 /* 535 * For the console, always force CLOCAL and !HUPCL, so that the port 536 * is always active. 537 */ 538 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 539 ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 540 SET(t->c_cflag, CLOCAL); 541 CLR(t->c_cflag, HUPCL); 542 } 543 544 /* 545 * If there were no changes, don't do anything. This avoids dropping 546 * input and improves performance when all we did was frob things like 547 * VMIN and VTIME. 548 */ 549 if (tp->t_ospeed == t->c_ospeed && 550 tp->t_cflag == t->c_cflag) 551 return (0); 552 553 #if 0 554 /* XXX (msaitoh) */ 555 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 556 #endif 557 558 s = splserial(); 559 560 /* 561 * Set the FIFO threshold based on the receive speed. 562 * 563 * * If it's a low speed, it's probably a mouse or some other 564 * interactive device, so set the threshold low. 565 * * If it's a high speed, trim the trigger level down to prevent 566 * overflows. 567 * * Otherwise set it a bit higher. 568 */ 569 #if 0 570 /* XXX (msaitoh) */ 571 if (ISSET(sc->sc_hwflags, SCI_HW_HAYESP)) 572 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 573 else if (ISSET(sc->sc_hwflags, SCI_HW_FIFO)) 574 sc->sc_fifo = FIFO_ENABLE | 575 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 576 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 577 else 578 sc->sc_fifo = 0; 579 #endif 580 581 /* And copy to tty. */ 582 tp->t_ispeed = 0; 583 tp->t_ospeed = t->c_ospeed; 584 tp->t_cflag = t->c_cflag; 585 586 if (!sc->sc_heldchange) { 587 if (sc->sc_tx_busy) { 588 sc->sc_heldtbc = sc->sc_tbc; 589 sc->sc_tbc = 0; 590 sc->sc_heldchange = 1; 591 } 592 #if 0 593 /* XXX (msaitoh) */ 594 else 595 sci_loadchannelregs(sc); 596 #endif 597 } 598 599 if (!ISSET(t->c_cflag, CHWFLOW)) { 600 /* Disable the high water mark. */ 601 sc->sc_r_hiwat = 0; 602 sc->sc_r_lowat = 0; 603 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 604 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 605 sci_schedrx(sc); 606 } 607 } else { 608 sc->sc_r_hiwat = sci_rbuf_hiwat; 609 sc->sc_r_lowat = sci_rbuf_lowat; 610 } 611 612 splx(s); 613 614 #ifdef SCI_DEBUG 615 if (sci_debug) 616 scistatus(sc, "sciparam "); 617 #endif 618 619 if (!ISSET(t->c_cflag, CHWFLOW)) { 620 if (sc->sc_tx_stopped) { 621 sc->sc_tx_stopped = 0; 622 scistart(tp); 623 } 624 } 625 626 return (0); 627 } 628 629 void 630 sci_iflush(struct sci_softc *sc) 631 { 632 unsigned char err_c; 633 volatile unsigned char c; 634 635 if (((err_c = SHREG_SCSSR) 636 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 637 638 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 639 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 640 return; 641 } 642 643 c = SHREG_SCRDR; 644 645 SHREG_SCSSR &= ~SCSSR_RDRF; 646 } 647 } 648 649 int 650 sciopen(dev_t dev, int flag, int mode, struct proc *p) 651 { 652 int unit = SCIUNIT(dev); 653 struct sci_softc *sc; 654 struct tty *tp; 655 int s, s2; 656 int error; 657 658 if (unit >= sci_cd.cd_ndevs) 659 return (ENXIO); 660 sc = sci_cd.cd_devs[unit]; 661 if (sc == 0 || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK) || 662 sc->sc_rbuf == NULL) 663 return (ENXIO); 664 665 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 666 return (ENXIO); 667 668 #ifdef KGDB 669 /* 670 * If this is the kgdb port, no other use is permitted. 671 */ 672 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) 673 return (EBUSY); 674 #endif 675 676 tp = sc->sc_tty; 677 678 if (ISSET(tp->t_state, TS_ISOPEN) && 679 ISSET(tp->t_state, TS_XCLUDE) && 680 p->p_ucred->cr_uid != 0) 681 return (EBUSY); 682 683 s = spltty(); 684 685 /* 686 * Do the following iff this is a first open. 687 */ 688 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 689 struct termios t; 690 691 tp->t_dev = dev; 692 693 s2 = splserial(); 694 695 /* Turn on interrupts. */ 696 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 697 698 splx(s2); 699 700 /* 701 * Initialize the termios status to the defaults. Add in the 702 * sticky bits from TIOCSFLAGS. 703 */ 704 t.c_ispeed = 0; 705 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 706 t.c_ospeed = scicn_speed; 707 t.c_cflag = sciconscflag; 708 } else { 709 t.c_ospeed = TTYDEF_SPEED; 710 t.c_cflag = TTYDEF_CFLAG; 711 } 712 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 713 SET(t.c_cflag, CLOCAL); 714 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 715 SET(t.c_cflag, CRTSCTS); 716 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 717 SET(t.c_cflag, MDMBUF); 718 /* Make sure sciparam() will do something. */ 719 tp->t_ospeed = 0; 720 (void) sciparam(tp, &t); 721 tp->t_iflag = TTYDEF_IFLAG; 722 tp->t_oflag = TTYDEF_OFLAG; 723 tp->t_lflag = TTYDEF_LFLAG; 724 ttychars(tp); 725 ttsetwater(tp); 726 727 s2 = splserial(); 728 729 /* Clear the input ring, and unblock. */ 730 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 731 sc->sc_rbavail = sci_rbuf_size; 732 sci_iflush(sc); 733 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 734 #if 0 735 /* XXX (msaitoh) */ 736 sci_hwiflow(sc); 737 #endif 738 739 #ifdef SCI_DEBUG 740 if (sci_debug) 741 scistatus(sc, "sciopen "); 742 #endif 743 744 splx(s2); 745 } 746 747 splx(s); 748 749 error = ttyopen(tp, SCIDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 750 if (error) 751 goto bad; 752 753 error = (*tp->t_linesw->l_open)(dev, tp); 754 if (error) 755 goto bad; 756 757 return (0); 758 759 bad: 760 761 return (error); 762 } 763 764 int 765 sciclose(dev_t dev, int flag, int mode, struct proc *p) 766 { 767 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 768 struct tty *tp = sc->sc_tty; 769 770 /* XXX This is for cons.c. */ 771 if (!ISSET(tp->t_state, TS_ISOPEN)) 772 return (0); 773 774 (*tp->t_linesw->l_close)(tp, flag); 775 ttyclose(tp); 776 777 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 778 return (0); 779 780 return (0); 781 } 782 783 int 784 sciread(dev_t dev, struct uio *uio, int flag) 785 { 786 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 787 struct tty *tp = sc->sc_tty; 788 789 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 790 } 791 792 int 793 sciwrite(dev_t dev, struct uio *uio, int flag) 794 { 795 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 796 struct tty *tp = sc->sc_tty; 797 798 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 799 } 800 801 int 802 scipoll(dev_t dev, int events, struct proc *p) 803 { 804 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 805 struct tty *tp = sc->sc_tty; 806 807 return ((*tp->t_linesw->l_poll)(tp, events, p)); 808 } 809 810 struct tty * 811 scitty(dev_t dev) 812 { 813 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 814 struct tty *tp = sc->sc_tty; 815 816 return (tp); 817 } 818 819 int 820 sciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 821 { 822 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 823 struct tty *tp = sc->sc_tty; 824 int error; 825 int s; 826 827 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 828 return (EIO); 829 830 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 831 if (error != EPASSTHROUGH) 832 return (error); 833 834 error = ttioctl(tp, cmd, data, flag, p); 835 if (error != EPASSTHROUGH) 836 return (error); 837 838 error = 0; 839 840 s = splserial(); 841 842 switch (cmd) { 843 case TIOCSBRK: 844 sci_break(sc, 1); 845 break; 846 847 case TIOCCBRK: 848 sci_break(sc, 0); 849 break; 850 851 case TIOCGFLAGS: 852 *(int *)data = sc->sc_swflags; 853 break; 854 855 case TIOCSFLAGS: 856 error = suser(p->p_ucred, &p->p_acflag); 857 if (error) 858 break; 859 sc->sc_swflags = *(int *)data; 860 break; 861 862 default: 863 error = EPASSTHROUGH; 864 break; 865 } 866 867 splx(s); 868 869 return (error); 870 } 871 872 integrate void 873 sci_schedrx(struct sci_softc *sc) 874 { 875 876 sc->sc_rx_ready = 1; 877 878 /* Wake up the poller. */ 879 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 880 softintr_schedule(sc->sc_si); 881 #else 882 #ifndef __NO_SOFT_SERIAL_INTERRUPT 883 setsoftserial(); 884 #else 885 if (!sci_softintr_scheduled) { 886 sci_softintr_scheduled = 1; 887 callout_reset(&sci_soft_ch, 1, scisoft, NULL); 888 } 889 #endif 890 #endif 891 } 892 893 void 894 sci_break(struct sci_softc *sc, int onoff) 895 { 896 897 if (onoff) 898 SHREG_SCSSR &= ~SCSSR_TDRE; 899 else 900 SHREG_SCSSR |= SCSSR_TDRE; 901 902 #if 0 /* XXX */ 903 if (!sc->sc_heldchange) { 904 if (sc->sc_tx_busy) { 905 sc->sc_heldtbc = sc->sc_tbc; 906 sc->sc_tbc = 0; 907 sc->sc_heldchange = 1; 908 } else 909 sci_loadchannelregs(sc); 910 } 911 #endif 912 } 913 914 /* 915 * Stop output, e.g., for ^S or output flush. 916 */ 917 void 918 scistop(struct tty *tp, int flag) 919 { 920 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 921 int s; 922 923 s = splserial(); 924 if (ISSET(tp->t_state, TS_BUSY)) { 925 /* Stop transmitting at the next chunk. */ 926 sc->sc_tbc = 0; 927 sc->sc_heldtbc = 0; 928 if (!ISSET(tp->t_state, TS_TTSTOP)) 929 SET(tp->t_state, TS_FLUSH); 930 } 931 splx(s); 932 } 933 934 void 935 scidiag(void *arg) 936 { 937 struct sci_softc *sc = arg; 938 int overflows, floods; 939 int s; 940 941 s = splserial(); 942 overflows = sc->sc_overflows; 943 sc->sc_overflows = 0; 944 floods = sc->sc_floods; 945 sc->sc_floods = 0; 946 sc->sc_errors = 0; 947 splx(s); 948 949 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 950 sc->sc_dev.dv_xname, 951 overflows, overflows == 1 ? "" : "s", 952 floods, floods == 1 ? "" : "s"); 953 } 954 955 integrate void 956 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 957 { 958 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 959 u_char *get, *end; 960 u_int cc, scc; 961 u_char ssr; 962 int code; 963 int s; 964 965 end = sc->sc_ebuf; 966 get = sc->sc_rbget; 967 scc = cc = sci_rbuf_size - sc->sc_rbavail; 968 969 if (cc == sci_rbuf_size) { 970 sc->sc_floods++; 971 if (sc->sc_errors++ == 0) 972 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 973 } 974 975 while (cc) { 976 code = get[0]; 977 ssr = get[1]; 978 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 979 if (ISSET(ssr, SCSSR_FER)) 980 SET(code, TTY_FE); 981 if (ISSET(ssr, SCSSR_PER)) 982 SET(code, TTY_PE); 983 } 984 if ((*rint)(code, tp) == -1) { 985 /* 986 * The line discipline's buffer is out of space. 987 */ 988 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 989 /* 990 * We're either not using flow control, or the 991 * line discipline didn't tell us to block for 992 * some reason. Either way, we have no way to 993 * know when there's more space available, so 994 * just drop the rest of the data. 995 */ 996 get += cc << 1; 997 if (get >= end) 998 get -= sci_rbuf_size << 1; 999 cc = 0; 1000 } else { 1001 /* 1002 * Don't schedule any more receive processing 1003 * until the line discipline tells us there's 1004 * space available (through scihwiflow()). 1005 * Leave the rest of the data in the input 1006 * buffer. 1007 */ 1008 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1009 } 1010 break; 1011 } 1012 get += 2; 1013 if (get >= end) 1014 get = sc->sc_rbuf; 1015 cc--; 1016 } 1017 1018 if (cc != scc) { 1019 sc->sc_rbget = get; 1020 s = splserial(); 1021 cc = sc->sc_rbavail += scc - cc; 1022 /* Buffers should be ok again, release possible block. */ 1023 if (cc >= sc->sc_r_lowat) { 1024 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1025 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1026 SHREG_SCSCR |= SCSCR_RIE; 1027 } 1028 #if 0 1029 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1030 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1031 sci_hwiflow(sc); 1032 } 1033 #endif 1034 } 1035 splx(s); 1036 } 1037 } 1038 1039 integrate void 1040 sci_txsoft(sc, tp) 1041 struct sci_softc *sc; 1042 struct tty *tp; 1043 { 1044 1045 CLR(tp->t_state, TS_BUSY); 1046 if (ISSET(tp->t_state, TS_FLUSH)) 1047 CLR(tp->t_state, TS_FLUSH); 1048 else 1049 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1050 (*tp->t_linesw->l_start)(tp); 1051 } 1052 1053 integrate void 1054 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1055 { 1056 #if 0 1057 /* XXX (msaitoh) */ 1058 u_char msr, delta; 1059 int s; 1060 1061 s = splserial(); 1062 msr = sc->sc_msr; 1063 delta = sc->sc_msr_delta; 1064 sc->sc_msr_delta = 0; 1065 splx(s); 1066 1067 if (ISSET(delta, sc->sc_msr_dcd)) { 1068 /* 1069 * Inform the tty layer that carrier detect changed. 1070 */ 1071 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1072 } 1073 1074 if (ISSET(delta, sc->sc_msr_cts)) { 1075 /* Block or unblock output according to flow control. */ 1076 if (ISSET(msr, sc->sc_msr_cts)) { 1077 sc->sc_tx_stopped = 0; 1078 (*tp->t_linesw->l_start)(tp); 1079 } else { 1080 sc->sc_tx_stopped = 1; 1081 } 1082 } 1083 1084 #ifdef SCI_DEBUG 1085 if (sci_debug) 1086 scistatus(sc, "sci_stsoft"); 1087 #endif 1088 #endif 1089 } 1090 1091 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1092 void 1093 scisoft(void *arg) 1094 { 1095 struct sci_softc *sc = arg; 1096 struct tty *tp; 1097 1098 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1099 return; 1100 1101 { 1102 #else 1103 void 1104 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1105 scisoft() 1106 #else 1107 scisoft(void *arg) 1108 #endif 1109 { 1110 struct sci_softc *sc; 1111 struct tty *tp; 1112 int unit; 1113 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1114 int s; 1115 1116 s = splsoftserial(); 1117 sci_softintr_scheduled = 0; 1118 #endif 1119 1120 for (unit = 0; unit < sci_cd.cd_ndevs; unit++) { 1121 sc = sci_cd.cd_devs[unit]; 1122 if (sc == NULL || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK)) 1123 continue; 1124 1125 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1126 continue; 1127 1128 tp = sc->sc_tty; 1129 if (tp == NULL) 1130 continue; 1131 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1132 continue; 1133 #endif 1134 tp = sc->sc_tty; 1135 1136 if (sc->sc_rx_ready) { 1137 sc->sc_rx_ready = 0; 1138 sci_rxsoft(sc, tp); 1139 } 1140 1141 #if 0 1142 if (sc->sc_st_check) { 1143 sc->sc_st_check = 0; 1144 sci_stsoft(sc, tp); 1145 } 1146 #endif 1147 1148 if (sc->sc_tx_done) { 1149 sc->sc_tx_done = 0; 1150 sci_txsoft(sc, tp); 1151 } 1152 } 1153 1154 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1155 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1156 splx(s); 1157 #endif 1158 #endif 1159 } 1160 1161 int 1162 sciintr(void *arg) 1163 { 1164 struct sci_softc *sc = arg; 1165 u_char *put, *end; 1166 u_int cc; 1167 u_short ssr; 1168 1169 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1170 return (0); 1171 1172 end = sc->sc_ebuf; 1173 put = sc->sc_rbput; 1174 cc = sc->sc_rbavail; 1175 1176 do { 1177 ssr = SHREG_SCSSR; 1178 if (ISSET(ssr, SCSSR_FER)) { 1179 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_PER | SCSSR_FER); 1180 #if defined(DDB) || defined(KGDB) 1181 #ifdef SH4 1182 if ((SHREG_SCSPTR & SCSPTR_SPB0DT) != 0) { 1183 #else 1184 if ((SHREG_SCSPDR & SCSPDR_SCP0DT) != 0) { 1185 #endif 1186 #ifdef DDB 1187 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 1188 console_debugger(); 1189 } 1190 #endif 1191 #ifdef KGDB 1192 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) { 1193 kgdb_connect(1); 1194 } 1195 #endif 1196 } 1197 #endif /* DDB || KGDB */ 1198 } 1199 if ((SHREG_SCSSR & SCSSR_RDRF) != 0) { 1200 if (cc > 0) { 1201 put[0] = SHREG_SCRDR; 1202 put[1] = SHREG_SCSSR & 0x00ff; 1203 1204 put += 2; 1205 if (put >= end) 1206 put = sc->sc_rbuf; 1207 cc--; 1208 } 1209 1210 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1211 SCSSR_RDRF); 1212 1213 /* 1214 * Current string of incoming characters ended because 1215 * no more data was available or we ran out of space. 1216 * Schedule a receive event if any data was received. 1217 * If we're out of space, turn off receive interrupts. 1218 */ 1219 sc->sc_rbput = put; 1220 sc->sc_rbavail = cc; 1221 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1222 sc->sc_rx_ready = 1; 1223 1224 /* 1225 * See if we are in danger of overflowing a buffer. If 1226 * so, use hardware flow control to ease the pressure. 1227 */ 1228 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1229 cc < sc->sc_r_hiwat) { 1230 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1231 #if 0 1232 sci_hwiflow(sc); 1233 #endif 1234 } 1235 1236 /* 1237 * If we're out of space, disable receive interrupts 1238 * until the queue has drained a bit. 1239 */ 1240 if (!cc) { 1241 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1242 SHREG_SCSCR &= ~SCSCR_RIE; 1243 } 1244 } else { 1245 if (SHREG_SCSSR & SCSSR_RDRF) { 1246 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1247 delay(10); 1248 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 1249 continue; 1250 } 1251 } 1252 } while (SHREG_SCSSR & SCSSR_RDRF); 1253 1254 #if 0 1255 msr = bus_space_read_1(iot, ioh, sci_msr); 1256 delta = msr ^ sc->sc_msr; 1257 sc->sc_msr = msr; 1258 if (ISSET(delta, sc->sc_msr_mask)) { 1259 SET(sc->sc_msr_delta, delta); 1260 1261 /* 1262 * Pulse-per-second clock signal on edge of DCD? 1263 */ 1264 if (ISSET(delta, sc->sc_ppsmask)) { 1265 struct timeval tv; 1266 if (ISSET(msr, sc->sc_ppsmask) == 1267 sc->sc_ppsassert) { 1268 /* XXX nanotime() */ 1269 microtime(&tv); 1270 TIMEVAL_TO_TIMESPEC(&tv, 1271 &sc->ppsinfo.assert_timestamp); 1272 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1273 timespecadd(&sc->ppsinfo.assert_timestamp, 1274 &sc->ppsparam.assert_offset, 1275 &sc->ppsinfo.assert_timestamp); 1276 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1277 } 1278 1279 #ifdef PPS_SYNC 1280 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1281 hardpps(&tv, tv.tv_usec); 1282 #endif 1283 sc->ppsinfo.assert_sequence++; 1284 sc->ppsinfo.current_mode = 1285 sc->ppsparam.mode; 1286 1287 } else if (ISSET(msr, sc->sc_ppsmask) == 1288 sc->sc_ppsclear) { 1289 /* XXX nanotime() */ 1290 microtime(&tv); 1291 TIMEVAL_TO_TIMESPEC(&tv, 1292 &sc->ppsinfo.clear_timestamp); 1293 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1294 timespecadd(&sc->ppsinfo.clear_timestamp, 1295 &sc->ppsparam.clear_offset, 1296 &sc->ppsinfo.clear_timestamp); 1297 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1298 } 1299 1300 #ifdef PPS_SYNC 1301 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1302 hardpps(&tv, tv.tv_usec); 1303 #endif 1304 sc->ppsinfo.clear_sequence++; 1305 sc->ppsinfo.current_mode = 1306 sc->ppsparam.mode; 1307 } 1308 } 1309 1310 /* 1311 * Stop output immediately if we lose the output 1312 * flow control signal or carrier detect. 1313 */ 1314 if (ISSET(~msr, sc->sc_msr_mask)) { 1315 sc->sc_tbc = 0; 1316 sc->sc_heldtbc = 0; 1317 #ifdef SCI_DEBUG 1318 if (sci_debug) 1319 scistatus(sc, "sciintr "); 1320 #endif 1321 } 1322 1323 sc->sc_st_check = 1; 1324 } 1325 #endif 1326 1327 /* 1328 * Done handling any receive interrupts. See if data can be 1329 * transmitted as well. Schedule tx done event if no data left 1330 * and tty was marked busy. 1331 */ 1332 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1333 /* 1334 * If we've delayed a parameter change, do it now, and restart 1335 * output. 1336 */ 1337 if (sc->sc_heldchange) { 1338 sc->sc_heldchange = 0; 1339 sc->sc_tbc = sc->sc_heldtbc; 1340 sc->sc_heldtbc = 0; 1341 } 1342 1343 /* Output the next chunk of the contiguous buffer, if any. */ 1344 if (sc->sc_tbc > 0) { 1345 sci_putc(*(sc->sc_tba)); 1346 sc->sc_tba++; 1347 sc->sc_tbc--; 1348 } else { 1349 /* Disable transmit completion interrupts if necessary. */ 1350 #if 0 1351 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1352 #endif 1353 SHREG_SCSCR &= ~SCSCR_TIE; 1354 1355 if (sc->sc_tx_busy) { 1356 sc->sc_tx_busy = 0; 1357 sc->sc_tx_done = 1; 1358 } 1359 } 1360 } 1361 1362 /* Wake up the poller. */ 1363 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1364 softintr_schedule(sc->sc_si); 1365 #else 1366 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1367 setsoftserial(); 1368 #else 1369 if (!sci_softintr_scheduled) { 1370 sci_softintr_scheduled = 1; 1371 callout_reset(&sci_soft_ch, 1, scisoft, 1); 1372 } 1373 #endif 1374 #endif 1375 1376 #if NRND > 0 && defined(RND_SCI) 1377 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1378 #endif 1379 1380 return (1); 1381 } 1382 1383 void 1384 scicnprobe(cp) 1385 struct consdev *cp; 1386 { 1387 int maj; 1388 1389 /* locate the major number */ 1390 maj = cdevsw_lookup_major(&sci_cdevsw); 1391 1392 /* Initialize required fields. */ 1393 cp->cn_dev = makedev(maj, 0); 1394 #ifdef SCICONSOLE 1395 cp->cn_pri = CN_REMOTE; 1396 #else 1397 cp->cn_pri = CN_NORMAL; 1398 #endif 1399 } 1400 1401 void 1402 scicninit(struct consdev *cp) 1403 { 1404 1405 InitializeSci(scicn_speed); 1406 sciisconsole = 1; 1407 } 1408 1409 int 1410 scicngetc(dev_t dev) 1411 { 1412 int c; 1413 int s; 1414 1415 s = splserial(); 1416 c = sci_getc(); 1417 splx(s); 1418 1419 return (c); 1420 } 1421 1422 void 1423 scicnputc(dev_t dev, int c) 1424 { 1425 int s; 1426 1427 s = splserial(); 1428 sci_putc((u_char)c); 1429 splx(s); 1430 } 1431
Indexes created Tue Sep 23 23:09:58 GMT 2025