sci.c revision 1.25.2.2
1 /* $NetBSD: sci.c,v 1.25.2.2 2002/05/30 15:35:43 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 if (c == '\n') 339 sci_putc('\r'); 340 341 /* wait for ready */ 342 while ((SHREG_SCSSR & SCSSR_TDRE) == NULL) 343 ; 344 345 /* write send data to send register */ 346 SHREG_SCTDR = c; 347 348 /* clear ready flag */ 349 SHREG_SCSSR &= ~SCSSR_TDRE; 350 } 351 352 /* 353 * : SciErrCheck 354 * 0x20 = over run 355 * 0x10 = frame error 356 * 0x80 = parity error 357 */ 358 int 359 SciErrCheck(void) 360 { 361 362 return(SHREG_SCSSR & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)); 363 } 364 365 /* 366 * sci_getc 367 */ 368 unsigned char 369 sci_getc(void) 370 { 371 unsigned char c, err_c; 372 373 while (((err_c = SHREG_SCSSR) 374 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) == 0) 375 ; 376 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 377 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 378 return(err_c |= 0x80); 379 } 380 381 c = SHREG_SCRDR; 382 383 SHREG_SCSSR &= ~SCSSR_RDRF; 384 385 return(c); 386 } 387 388 #if 0 389 #define SCI_MAX_UNITS 2 390 #else 391 #define SCI_MAX_UNITS 1 392 #endif 393 394 395 static int 396 sci_match(struct device *parent, struct cfdata *cfp, void *aux) 397 { 398 399 if (strcmp(cfp->cf_driver->cd_name, "sci") 400 || cfp->cf_unit >= SCI_MAX_UNITS) //XXX __BROKEN_CONFIG_UNIT_USAGE 401 return 0; 402 403 return 1; 404 } 405 406 static void 407 sci_attach(struct device *parent, struct device *self, void *aux) 408 { 409 struct sci_softc *sc = (struct sci_softc *)self; 410 struct tty *tp; 411 412 sc->sc_hwflags = 0; /* XXX */ 413 sc->sc_swflags = 0; /* XXX */ 414 sc->sc_fifolen = 0; /* XXX */ 415 416 if (sciisconsole) { 417 SET(sc->sc_hwflags, SCI_HW_CONSOLE); 418 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 419 printf("\n%s: console\n", sc->sc_dev.dv_xname); 420 } else { 421 InitializeSci(9600); 422 printf("\n"); 423 } 424 425 callout_init(&sc->sc_diag_ch); 426 427 intc_intr_establish(SH_INTEVT_SCI_ERI, IST_LEVEL, IPL_SERIAL, sciintr, 428 sc); 429 intc_intr_establish(SH_INTEVT_SCI_RXI, IST_LEVEL, IPL_SERIAL, sciintr, 430 sc); 431 intc_intr_establish(SH_INTEVT_SCI_TXI, IST_LEVEL, IPL_SERIAL, sciintr, 432 sc); 433 intc_intr_establish(SH_INTEVT_SCI_TEI, IST_LEVEL, IPL_SERIAL, sciintr, 434 sc); 435 436 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 437 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, scisoft, sc); 438 #endif 439 SET(sc->sc_hwflags, SCI_HW_DEV_OK); 440 441 tp = ttymalloc(); 442 tp->t_oproc = scistart; 443 tp->t_param = sciparam; 444 tp->t_hwiflow = NULL; 445 446 sc->sc_tty = tp; 447 sc->sc_rbuf = malloc(sci_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 448 if (sc->sc_rbuf == NULL) { 449 printf("%s: unable to allocate ring buffer\n", 450 sc->sc_dev.dv_xname); 451 return; 452 } 453 sc->sc_ebuf = sc->sc_rbuf + (sci_rbuf_size << 1); 454 455 tty_attach(tp); 456 } 457 458 /* 459 * Start or restart transmission. 460 */ 461 static void 462 scistart(struct tty *tp) 463 { 464 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 465 int s; 466 467 s = spltty(); 468 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 469 goto out; 470 if (sc->sc_tx_stopped) 471 goto out; 472 473 if (tp->t_outq.c_cc <= tp->t_lowat) { 474 if (ISSET(tp->t_state, TS_ASLEEP)) { 475 CLR(tp->t_state, TS_ASLEEP); 476 wakeup(&tp->t_outq); 477 } 478 selwakeup(&tp->t_wsel); 479 if (tp->t_outq.c_cc == 0) 480 goto out; 481 } 482 483 /* Grab the first contiguous region of buffer space. */ 484 { 485 u_char *tba; 486 int tbc; 487 488 tba = tp->t_outq.c_cf; 489 tbc = ndqb(&tp->t_outq, 0); 490 491 (void)splserial(); 492 493 sc->sc_tba = tba; 494 sc->sc_tbc = tbc; 495 } 496 497 SET(tp->t_state, TS_BUSY); 498 sc->sc_tx_busy = 1; 499 500 /* Enable transmit completion interrupts if necessary. */ 501 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 502 503 /* Output the first byte of the contiguous buffer. */ 504 { 505 if (sc->sc_tbc > 0) { 506 sci_putc(*(sc->sc_tba)); 507 sc->sc_tba++; 508 sc->sc_tbc--; 509 } 510 } 511 out: 512 splx(s); 513 return; 514 } 515 516 /* 517 * Set SCI tty parameters from termios. 518 * XXX - Should just copy the whole termios after 519 * making sure all the changes could be done. 520 */ 521 static int 522 sciparam(struct tty *tp, struct termios *t) 523 { 524 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 525 int ospeed = t->c_ospeed; 526 int s; 527 528 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 529 return (EIO); 530 531 /* Check requested parameters. */ 532 if (ospeed < 0) 533 return (EINVAL); 534 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 535 return (EINVAL); 536 537 /* 538 * For the console, always force CLOCAL and !HUPCL, so that the port 539 * is always active. 540 */ 541 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 542 ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 543 SET(t->c_cflag, CLOCAL); 544 CLR(t->c_cflag, HUPCL); 545 } 546 547 /* 548 * If there were no changes, don't do anything. This avoids dropping 549 * input and improves performance when all we did was frob things like 550 * VMIN and VTIME. 551 */ 552 if (tp->t_ospeed == t->c_ospeed && 553 tp->t_cflag == t->c_cflag) 554 return (0); 555 556 #if 0 557 /* XXX (msaitoh) */ 558 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 559 #endif 560 561 s = splserial(); 562 563 /* 564 * Set the FIFO threshold based on the receive speed. 565 * 566 * * If it's a low speed, it's probably a mouse or some other 567 * interactive device, so set the threshold low. 568 * * If it's a high speed, trim the trigger level down to prevent 569 * overflows. 570 * * Otherwise set it a bit higher. 571 */ 572 #if 0 573 /* XXX (msaitoh) */ 574 if (ISSET(sc->sc_hwflags, SCI_HW_HAYESP)) 575 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 576 else if (ISSET(sc->sc_hwflags, SCI_HW_FIFO)) 577 sc->sc_fifo = FIFO_ENABLE | 578 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 579 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 580 else 581 sc->sc_fifo = 0; 582 #endif 583 584 /* And copy to tty. */ 585 tp->t_ispeed = 0; 586 tp->t_ospeed = t->c_ospeed; 587 tp->t_cflag = t->c_cflag; 588 589 if (!sc->sc_heldchange) { 590 if (sc->sc_tx_busy) { 591 sc->sc_heldtbc = sc->sc_tbc; 592 sc->sc_tbc = 0; 593 sc->sc_heldchange = 1; 594 } 595 #if 0 596 /* XXX (msaitoh) */ 597 else 598 sci_loadchannelregs(sc); 599 #endif 600 } 601 602 if (!ISSET(t->c_cflag, CHWFLOW)) { 603 /* Disable the high water mark. */ 604 sc->sc_r_hiwat = 0; 605 sc->sc_r_lowat = 0; 606 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 607 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 608 sci_schedrx(sc); 609 } 610 } else { 611 sc->sc_r_hiwat = sci_rbuf_hiwat; 612 sc->sc_r_lowat = sci_rbuf_lowat; 613 } 614 615 splx(s); 616 617 #ifdef SCI_DEBUG 618 if (sci_debug) 619 scistatus(sc, "sciparam "); 620 #endif 621 622 if (!ISSET(t->c_cflag, CHWFLOW)) { 623 if (sc->sc_tx_stopped) { 624 sc->sc_tx_stopped = 0; 625 scistart(tp); 626 } 627 } 628 629 return (0); 630 } 631 632 void 633 sci_iflush(struct sci_softc *sc) 634 { 635 unsigned char err_c; 636 volatile unsigned char c; 637 638 if (((err_c = SHREG_SCSSR) 639 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 640 641 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 642 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 643 return; 644 } 645 646 c = SHREG_SCRDR; 647 648 SHREG_SCSSR &= ~SCSSR_RDRF; 649 } 650 } 651 652 int 653 sciopen(dev_t dev, int flag, int mode, struct proc *p) 654 { 655 int unit = SCIUNIT(dev); 656 struct sci_softc *sc; 657 struct tty *tp; 658 int s, s2; 659 int error; 660 661 if (unit >= sci_cd.cd_ndevs) 662 return (ENXIO); 663 sc = sci_cd.cd_devs[unit]; 664 if (sc == 0 || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK) || 665 sc->sc_rbuf == NULL) 666 return (ENXIO); 667 668 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 669 return (ENXIO); 670 671 #ifdef KGDB 672 /* 673 * If this is the kgdb port, no other use is permitted. 674 */ 675 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) 676 return (EBUSY); 677 #endif 678 679 tp = sc->sc_tty; 680 681 if (ISSET(tp->t_state, TS_ISOPEN) && 682 ISSET(tp->t_state, TS_XCLUDE) && 683 p->p_ucred->cr_uid != 0) 684 return (EBUSY); 685 686 s = spltty(); 687 688 /* 689 * Do the following iff this is a first open. 690 */ 691 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 692 struct termios t; 693 694 tp->t_dev = dev; 695 696 s2 = splserial(); 697 698 /* Turn on interrupts. */ 699 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 700 701 splx(s2); 702 703 /* 704 * Initialize the termios status to the defaults. Add in the 705 * sticky bits from TIOCSFLAGS. 706 */ 707 t.c_ispeed = 0; 708 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 709 t.c_ospeed = scicn_speed; 710 t.c_cflag = sciconscflag; 711 } else { 712 t.c_ospeed = TTYDEF_SPEED; 713 t.c_cflag = TTYDEF_CFLAG; 714 } 715 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 716 SET(t.c_cflag, CLOCAL); 717 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 718 SET(t.c_cflag, CRTSCTS); 719 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 720 SET(t.c_cflag, MDMBUF); 721 /* Make sure sciparam() will do something. */ 722 tp->t_ospeed = 0; 723 (void) sciparam(tp, &t); 724 tp->t_iflag = TTYDEF_IFLAG; 725 tp->t_oflag = TTYDEF_OFLAG; 726 tp->t_lflag = TTYDEF_LFLAG; 727 ttychars(tp); 728 ttsetwater(tp); 729 730 s2 = splserial(); 731 732 /* Clear the input ring, and unblock. */ 733 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 734 sc->sc_rbavail = sci_rbuf_size; 735 sci_iflush(sc); 736 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 737 #if 0 738 /* XXX (msaitoh) */ 739 sci_hwiflow(sc); 740 #endif 741 742 #ifdef SCI_DEBUG 743 if (sci_debug) 744 scistatus(sc, "sciopen "); 745 #endif 746 747 splx(s2); 748 } 749 750 splx(s); 751 752 error = ttyopen(tp, SCIDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 753 if (error) 754 goto bad; 755 756 error = (*tp->t_linesw->l_open)(dev, tp); 757 if (error) 758 goto bad; 759 760 return (0); 761 762 bad: 763 764 return (error); 765 } 766 767 int 768 sciclose(dev_t dev, int flag, int mode, struct proc *p) 769 { 770 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 771 struct tty *tp = sc->sc_tty; 772 773 /* XXX This is for cons.c. */ 774 if (!ISSET(tp->t_state, TS_ISOPEN)) 775 return (0); 776 777 (*tp->t_linesw->l_close)(tp, flag); 778 ttyclose(tp); 779 780 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 781 return (0); 782 783 return (0); 784 } 785 786 int 787 sciread(dev_t dev, struct uio *uio, int flag) 788 { 789 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 790 struct tty *tp = sc->sc_tty; 791 792 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 793 } 794 795 int 796 sciwrite(dev_t dev, struct uio *uio, int flag) 797 { 798 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 799 struct tty *tp = sc->sc_tty; 800 801 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 802 } 803 804 int 805 scipoll(dev_t dev, int events, struct proc *p) 806 { 807 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 808 struct tty *tp = sc->sc_tty; 809 810 return ((*tp->t_linesw->l_poll)(tp, events, p)); 811 } 812 813 struct tty * 814 scitty(dev_t dev) 815 { 816 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 817 struct tty *tp = sc->sc_tty; 818 819 return (tp); 820 } 821 822 int 823 sciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 824 { 825 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 826 struct tty *tp = sc->sc_tty; 827 int error; 828 int s; 829 830 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 831 return (EIO); 832 833 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 834 if (error != EPASSTHROUGH) 835 return (error); 836 837 error = ttioctl(tp, cmd, data, flag, p); 838 if (error != EPASSTHROUGH) 839 return (error); 840 841 error = 0; 842 843 s = splserial(); 844 845 switch (cmd) { 846 case TIOCSBRK: 847 sci_break(sc, 1); 848 break; 849 850 case TIOCCBRK: 851 sci_break(sc, 0); 852 break; 853 854 case TIOCGFLAGS: 855 *(int *)data = sc->sc_swflags; 856 break; 857 858 case TIOCSFLAGS: 859 error = suser(p->p_ucred, &p->p_acflag); 860 if (error) 861 break; 862 sc->sc_swflags = *(int *)data; 863 break; 864 865 default: 866 error = EPASSTHROUGH; 867 break; 868 } 869 870 splx(s); 871 872 return (error); 873 } 874 875 integrate void 876 sci_schedrx(struct sci_softc *sc) 877 { 878 879 sc->sc_rx_ready = 1; 880 881 /* Wake up the poller. */ 882 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 883 softintr_schedule(sc->sc_si); 884 #else 885 #ifndef __NO_SOFT_SERIAL_INTERRUPT 886 setsoftserial(); 887 #else 888 if (!sci_softintr_scheduled) { 889 sci_softintr_scheduled = 1; 890 callout_reset(&sci_soft_ch, 1, scisoft, NULL); 891 } 892 #endif 893 #endif 894 } 895 896 void 897 sci_break(struct sci_softc *sc, int onoff) 898 { 899 900 if (onoff) 901 SHREG_SCSSR &= ~SCSSR_TDRE; 902 else 903 SHREG_SCSSR |= SCSSR_TDRE; 904 905 #if 0 /* XXX */ 906 if (!sc->sc_heldchange) { 907 if (sc->sc_tx_busy) { 908 sc->sc_heldtbc = sc->sc_tbc; 909 sc->sc_tbc = 0; 910 sc->sc_heldchange = 1; 911 } else 912 sci_loadchannelregs(sc); 913 } 914 #endif 915 } 916 917 /* 918 * Stop output, e.g., for ^S or output flush. 919 */ 920 void 921 scistop(struct tty *tp, int flag) 922 { 923 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 924 int s; 925 926 s = splserial(); 927 if (ISSET(tp->t_state, TS_BUSY)) { 928 /* Stop transmitting at the next chunk. */ 929 sc->sc_tbc = 0; 930 sc->sc_heldtbc = 0; 931 if (!ISSET(tp->t_state, TS_TTSTOP)) 932 SET(tp->t_state, TS_FLUSH); 933 } 934 splx(s); 935 } 936 937 void 938 scidiag(void *arg) 939 { 940 struct sci_softc *sc = arg; 941 int overflows, floods; 942 int s; 943 944 s = splserial(); 945 overflows = sc->sc_overflows; 946 sc->sc_overflows = 0; 947 floods = sc->sc_floods; 948 sc->sc_floods = 0; 949 sc->sc_errors = 0; 950 splx(s); 951 952 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 953 sc->sc_dev.dv_xname, 954 overflows, overflows == 1 ? "" : "s", 955 floods, floods == 1 ? "" : "s"); 956 } 957 958 integrate void 959 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 960 { 961 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 962 u_char *get, *end; 963 u_int cc, scc; 964 u_char ssr; 965 int code; 966 int s; 967 968 end = sc->sc_ebuf; 969 get = sc->sc_rbget; 970 scc = cc = sci_rbuf_size - sc->sc_rbavail; 971 972 if (cc == sci_rbuf_size) { 973 sc->sc_floods++; 974 if (sc->sc_errors++ == 0) 975 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 976 } 977 978 while (cc) { 979 code = get[0]; 980 ssr = get[1]; 981 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 982 if (ISSET(ssr, SCSSR_FER)) 983 SET(code, TTY_FE); 984 if (ISSET(ssr, SCSSR_PER)) 985 SET(code, TTY_PE); 986 } 987 if ((*rint)(code, tp) == -1) { 988 /* 989 * The line discipline's buffer is out of space. 990 */ 991 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 992 /* 993 * We're either not using flow control, or the 994 * line discipline didn't tell us to block for 995 * some reason. Either way, we have no way to 996 * know when there's more space available, so 997 * just drop the rest of the data. 998 */ 999 get += cc << 1; 1000 if (get >= end) 1001 get -= sci_rbuf_size << 1; 1002 cc = 0; 1003 } else { 1004 /* 1005 * Don't schedule any more receive processing 1006 * until the line discipline tells us there's 1007 * space available (through scihwiflow()). 1008 * Leave the rest of the data in the input 1009 * buffer. 1010 */ 1011 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1012 } 1013 break; 1014 } 1015 get += 2; 1016 if (get >= end) 1017 get = sc->sc_rbuf; 1018 cc--; 1019 } 1020 1021 if (cc != scc) { 1022 sc->sc_rbget = get; 1023 s = splserial(); 1024 cc = sc->sc_rbavail += scc - cc; 1025 /* Buffers should be ok again, release possible block. */ 1026 if (cc >= sc->sc_r_lowat) { 1027 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1028 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1029 SHREG_SCSCR |= SCSCR_RIE; 1030 } 1031 #if 0 1032 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1033 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1034 sci_hwiflow(sc); 1035 } 1036 #endif 1037 } 1038 splx(s); 1039 } 1040 } 1041 1042 integrate void 1043 sci_txsoft(sc, tp) 1044 struct sci_softc *sc; 1045 struct tty *tp; 1046 { 1047 1048 CLR(tp->t_state, TS_BUSY); 1049 if (ISSET(tp->t_state, TS_FLUSH)) 1050 CLR(tp->t_state, TS_FLUSH); 1051 else 1052 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1053 (*tp->t_linesw->l_start)(tp); 1054 } 1055 1056 integrate void 1057 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1058 { 1059 #if 0 1060 /* XXX (msaitoh) */ 1061 u_char msr, delta; 1062 int s; 1063 1064 s = splserial(); 1065 msr = sc->sc_msr; 1066 delta = sc->sc_msr_delta; 1067 sc->sc_msr_delta = 0; 1068 splx(s); 1069 1070 if (ISSET(delta, sc->sc_msr_dcd)) { 1071 /* 1072 * Inform the tty layer that carrier detect changed. 1073 */ 1074 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1075 } 1076 1077 if (ISSET(delta, sc->sc_msr_cts)) { 1078 /* Block or unblock output according to flow control. */ 1079 if (ISSET(msr, sc->sc_msr_cts)) { 1080 sc->sc_tx_stopped = 0; 1081 (*tp->t_linesw->l_start)(tp); 1082 } else { 1083 sc->sc_tx_stopped = 1; 1084 } 1085 } 1086 1087 #ifdef SCI_DEBUG 1088 if (sci_debug) 1089 scistatus(sc, "sci_stsoft"); 1090 #endif 1091 #endif 1092 } 1093 1094 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1095 void 1096 scisoft(void *arg) 1097 { 1098 struct sci_softc *sc = arg; 1099 struct tty *tp; 1100 1101 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1102 return; 1103 1104 { 1105 #else 1106 void 1107 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1108 scisoft() 1109 #else 1110 scisoft(void *arg) 1111 #endif 1112 { 1113 struct sci_softc *sc; 1114 struct tty *tp; 1115 int unit; 1116 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1117 int s; 1118 1119 s = splsoftserial(); 1120 sci_softintr_scheduled = 0; 1121 #endif 1122 1123 for (unit = 0; unit < sci_cd.cd_ndevs; unit++) { 1124 sc = sci_cd.cd_devs[unit]; 1125 if (sc == NULL || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK)) 1126 continue; 1127 1128 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1129 continue; 1130 1131 tp = sc->sc_tty; 1132 if (tp == NULL) 1133 continue; 1134 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1135 continue; 1136 #endif 1137 tp = sc->sc_tty; 1138 1139 if (sc->sc_rx_ready) { 1140 sc->sc_rx_ready = 0; 1141 sci_rxsoft(sc, tp); 1142 } 1143 1144 #if 0 1145 if (sc->sc_st_check) { 1146 sc->sc_st_check = 0; 1147 sci_stsoft(sc, tp); 1148 } 1149 #endif 1150 1151 if (sc->sc_tx_done) { 1152 sc->sc_tx_done = 0; 1153 sci_txsoft(sc, tp); 1154 } 1155 } 1156 1157 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1158 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1159 splx(s); 1160 #endif 1161 #endif 1162 } 1163 1164 int 1165 sciintr(void *arg) 1166 { 1167 struct sci_softc *sc = arg; 1168 u_char *put, *end; 1169 u_int cc; 1170 u_short ssr; 1171 1172 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1173 return (0); 1174 1175 end = sc->sc_ebuf; 1176 put = sc->sc_rbput; 1177 cc = sc->sc_rbavail; 1178 1179 do { 1180 ssr = SHREG_SCSSR; 1181 if (ISSET(ssr, SCSSR_FER)) { 1182 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_PER | SCSSR_FER); 1183 #if defined(DDB) || defined(KGDB) 1184 #ifdef SH4 1185 if ((SHREG_SCSPTR & SCSPTR_SPB0DT) != 0) { 1186 #else 1187 if ((SHREG_SCSPDR & SCSPDR_SCP0DT) != 0) { 1188 #endif 1189 #ifdef DDB 1190 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 1191 console_debugger(); 1192 } 1193 #endif 1194 #ifdef KGDB 1195 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) { 1196 kgdb_connect(1); 1197 } 1198 #endif 1199 } 1200 #endif /* DDB || KGDB */ 1201 } 1202 if ((SHREG_SCSSR & SCSSR_RDRF) != 0) { 1203 if (cc > 0) { 1204 put[0] = SHREG_SCRDR; 1205 put[1] = SHREG_SCSSR & 0x00ff; 1206 1207 put += 2; 1208 if (put >= end) 1209 put = sc->sc_rbuf; 1210 cc--; 1211 } 1212 1213 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1214 SCSSR_RDRF); 1215 1216 /* 1217 * Current string of incoming characters ended because 1218 * no more data was available or we ran out of space. 1219 * Schedule a receive event if any data was received. 1220 * If we're out of space, turn off receive interrupts. 1221 */ 1222 sc->sc_rbput = put; 1223 sc->sc_rbavail = cc; 1224 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1225 sc->sc_rx_ready = 1; 1226 1227 /* 1228 * See if we are in danger of overflowing a buffer. If 1229 * so, use hardware flow control to ease the pressure. 1230 */ 1231 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1232 cc < sc->sc_r_hiwat) { 1233 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1234 #if 0 1235 sci_hwiflow(sc); 1236 #endif 1237 } 1238 1239 /* 1240 * If we're out of space, disable receive interrupts 1241 * until the queue has drained a bit. 1242 */ 1243 if (!cc) { 1244 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1245 SHREG_SCSCR &= ~SCSCR_RIE; 1246 } 1247 } else { 1248 if (SHREG_SCSSR & SCSSR_RDRF) { 1249 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1250 delay(10); 1251 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 1252 continue; 1253 } 1254 } 1255 } while (SHREG_SCSSR & SCSSR_RDRF); 1256 1257 #if 0 1258 msr = bus_space_read_1(iot, ioh, sci_msr); 1259 delta = msr ^ sc->sc_msr; 1260 sc->sc_msr = msr; 1261 if (ISSET(delta, sc->sc_msr_mask)) { 1262 SET(sc->sc_msr_delta, delta); 1263 1264 /* 1265 * Pulse-per-second clock signal on edge of DCD? 1266 */ 1267 if (ISSET(delta, sc->sc_ppsmask)) { 1268 struct timeval tv; 1269 if (ISSET(msr, sc->sc_ppsmask) == 1270 sc->sc_ppsassert) { 1271 /* XXX nanotime() */ 1272 microtime(&tv); 1273 TIMEVAL_TO_TIMESPEC(&tv, 1274 &sc->ppsinfo.assert_timestamp); 1275 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1276 timespecadd(&sc->ppsinfo.assert_timestamp, 1277 &sc->ppsparam.assert_offset, 1278 &sc->ppsinfo.assert_timestamp); 1279 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1280 } 1281 1282 #ifdef PPS_SYNC 1283 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1284 hardpps(&tv, tv.tv_usec); 1285 #endif 1286 sc->ppsinfo.assert_sequence++; 1287 sc->ppsinfo.current_mode = 1288 sc->ppsparam.mode; 1289 1290 } else if (ISSET(msr, sc->sc_ppsmask) == 1291 sc->sc_ppsclear) { 1292 /* XXX nanotime() */ 1293 microtime(&tv); 1294 TIMEVAL_TO_TIMESPEC(&tv, 1295 &sc->ppsinfo.clear_timestamp); 1296 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1297 timespecadd(&sc->ppsinfo.clear_timestamp, 1298 &sc->ppsparam.clear_offset, 1299 &sc->ppsinfo.clear_timestamp); 1300 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1301 } 1302 1303 #ifdef PPS_SYNC 1304 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1305 hardpps(&tv, tv.tv_usec); 1306 #endif 1307 sc->ppsinfo.clear_sequence++; 1308 sc->ppsinfo.current_mode = 1309 sc->ppsparam.mode; 1310 } 1311 } 1312 1313 /* 1314 * Stop output immediately if we lose the output 1315 * flow control signal or carrier detect. 1316 */ 1317 if (ISSET(~msr, sc->sc_msr_mask)) { 1318 sc->sc_tbc = 0; 1319 sc->sc_heldtbc = 0; 1320 #ifdef SCI_DEBUG 1321 if (sci_debug) 1322 scistatus(sc, "sciintr "); 1323 #endif 1324 } 1325 1326 sc->sc_st_check = 1; 1327 } 1328 #endif 1329 1330 /* 1331 * Done handling any receive interrupts. See if data can be 1332 * transmitted as well. Schedule tx done event if no data left 1333 * and tty was marked busy. 1334 */ 1335 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1336 /* 1337 * If we've delayed a parameter change, do it now, and restart 1338 * output. 1339 */ 1340 if (sc->sc_heldchange) { 1341 sc->sc_heldchange = 0; 1342 sc->sc_tbc = sc->sc_heldtbc; 1343 sc->sc_heldtbc = 0; 1344 } 1345 1346 /* Output the next chunk of the contiguous buffer, if any. */ 1347 if (sc->sc_tbc > 0) { 1348 sci_putc(*(sc->sc_tba)); 1349 sc->sc_tba++; 1350 sc->sc_tbc--; 1351 } else { 1352 /* Disable transmit completion interrupts if necessary. */ 1353 #if 0 1354 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1355 #endif 1356 SHREG_SCSCR &= ~SCSCR_TIE; 1357 1358 if (sc->sc_tx_busy) { 1359 sc->sc_tx_busy = 0; 1360 sc->sc_tx_done = 1; 1361 } 1362 } 1363 } 1364 1365 /* Wake up the poller. */ 1366 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1367 softintr_schedule(sc->sc_si); 1368 #else 1369 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1370 setsoftserial(); 1371 #else 1372 if (!sci_softintr_scheduled) { 1373 sci_softintr_scheduled = 1; 1374 callout_reset(&sci_soft_ch, 1, scisoft, 1); 1375 } 1376 #endif 1377 #endif 1378 1379 #if NRND > 0 && defined(RND_SCI) 1380 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1381 #endif 1382 1383 return (1); 1384 } 1385 1386 void 1387 scicnprobe(cp) 1388 struct consdev *cp; 1389 { 1390 int maj; 1391 1392 /* locate the major number */ 1393 maj = cdevsw_lookup_major(&sci_cdevsw); 1394 1395 /* Initialize required fields. */ 1396 cp->cn_dev = makedev(maj, 0); 1397 #ifdef SCICONSOLE 1398 cp->cn_pri = CN_REMOTE; 1399 #else 1400 cp->cn_pri = CN_NORMAL; 1401 #endif 1402 } 1403 1404 void 1405 scicninit(struct consdev *cp) 1406 { 1407 1408 InitializeSci(scicn_speed); 1409 sciisconsole = 1; 1410 } 1411 1412 int 1413 scicngetc(dev_t dev) 1414 { 1415 int c; 1416 int s; 1417 1418 s = splserial(); 1419 c = sci_getc(); 1420 splx(s); 1421 1422 return (c); 1423 } 1424 1425 void 1426 scicnputc(dev_t dev, int c) 1427 { 1428 int s; 1429 1430 s = splserial(); 1431 sci_putc((u_char)c); 1432 splx(s); 1433 } 1434
Indexes created Wed Oct 01 18:09:54 GMT 2025