sci.c revision 1.34
1 /* $NetBSD: sci.c,v 1.34 2003/07/15 03:35:55 lukem 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 <sys/cdefs.h> 107 __KERNEL_RCSID(0, "$NetBSD: sci.c,v 1.34 2003/07/15 03:35:55 lukem Exp $"); 108 109 #include "opt_kgdb.h" 110 #include "opt_sci.h" 111 112 #include <sys/param.h> 113 #include <sys/systm.h> 114 #include <sys/tty.h> 115 #include <sys/proc.h> 116 #include <sys/conf.h> 117 #include <sys/file.h> 118 #include <sys/syslog.h> 119 #include <sys/kernel.h> 120 #include <sys/device.h> 121 #include <sys/malloc.h> 122 123 #include <dev/cons.h> 124 125 #include <sh3/clock.h> 126 #include <sh3/scireg.h> 127 #include <sh3/pfcreg.h> 128 #include <sh3/tmureg.h> 129 #include <sh3/exception.h> 130 #include <machine/intr.h> 131 132 static void scistart(struct tty *); 133 static int sciparam(struct tty *, struct termios *); 134 135 void scicnprobe(struct consdev *); 136 void scicninit(struct consdev *); 137 void scicnputc(dev_t, int); 138 int scicngetc(dev_t); 139 void scicnpoolc(dev_t, int); 140 int sciintr(void *); 141 142 struct sci_softc { 143 struct device sc_dev; /* boilerplate */ 144 struct tty *sc_tty; 145 void *sc_si; 146 struct callout sc_diag_ch; 147 148 #if 0 149 bus_space_tag_t sc_iot; /* ISA i/o space identifier */ 150 bus_space_handle_t sc_ioh; /* ISA io handle */ 151 152 int sc_drq; 153 154 int sc_frequency; 155 #endif 156 157 u_int sc_overflows, 158 sc_floods, 159 sc_errors; /* number of retries so far */ 160 u_char sc_status[7]; /* copy of registers */ 161 162 int sc_hwflags; 163 int sc_swflags; 164 u_int sc_fifolen; /* XXX always 0? */ 165 166 u_int sc_r_hiwat, 167 sc_r_lowat; 168 u_char *volatile sc_rbget, 169 *volatile sc_rbput; 170 volatile u_int sc_rbavail; 171 u_char *sc_rbuf, 172 *sc_ebuf; 173 174 u_char *sc_tba; /* transmit buffer address */ 175 u_int sc_tbc, /* transmit byte count */ 176 sc_heldtbc; 177 178 volatile u_char sc_rx_flags, /* receiver blocked */ 179 #define RX_TTY_BLOCKED 0x01 180 #define RX_TTY_OVERFLOWED 0x02 181 #define RX_IBUF_BLOCKED 0x04 182 #define RX_IBUF_OVERFLOWED 0x08 183 #define RX_ANY_BLOCK 0x0f 184 sc_tx_busy, /* working on an output chunk */ 185 sc_tx_done, /* done with one output chunk */ 186 sc_tx_stopped, /* H/W level stop (lost CTS) */ 187 sc_st_check, /* got a status interrupt */ 188 sc_rx_ready; 189 190 volatile u_char sc_heldchange; 191 }; 192 193 /* controller driver configuration */ 194 static int sci_match(struct device *, struct cfdata *, void *); 195 static void sci_attach(struct device *, struct device *, void *); 196 197 void sci_break(struct sci_softc *, int); 198 void sci_iflush(struct sci_softc *); 199 200 #define integrate static inline 201 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 202 void scisoft(void *); 203 #else 204 #ifndef __NO_SOFT_SERIAL_INTERRUPT 205 void scisoft(void); 206 #else 207 void scisoft(void *); 208 #endif 209 #endif 210 integrate void sci_rxsoft(struct sci_softc *, struct tty *); 211 integrate void sci_txsoft(struct sci_softc *, struct tty *); 212 integrate void sci_stsoft(struct sci_softc *, struct tty *); 213 integrate void sci_schedrx(struct sci_softc *); 214 void scidiag(void *); 215 216 #define SCIUNIT_MASK 0x7ffff 217 #define SCIDIALOUT_MASK 0x80000 218 219 #define SCIUNIT(x) (minor(x) & SCIUNIT_MASK) 220 #define SCIDIALOUT(x) (minor(x) & SCIDIALOUT_MASK) 221 222 /* Macros to clear/set/test flags. */ 223 #define SET(t, f) (t) |= (f) 224 #define CLR(t, f) (t) &= ~(f) 225 #define ISSET(t, f) ((t) & (f)) 226 227 /* Hardware flag masks */ 228 #define SCI_HW_NOIEN 0x01 229 #define SCI_HW_FIFO 0x02 230 #define SCI_HW_FLOW 0x08 231 #define SCI_HW_DEV_OK 0x20 232 #define SCI_HW_CONSOLE 0x40 233 #define SCI_HW_KGDB 0x80 234 235 /* Buffer size for character buffer */ 236 #define SCI_RING_SIZE 2048 237 238 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 239 u_int sci_rbuf_hiwat = (SCI_RING_SIZE * 1) / 4; 240 u_int sci_rbuf_lowat = (SCI_RING_SIZE * 3) / 4; 241 242 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 243 int sciconscflag = CONMODE; 244 int sciisconsole = 0; 245 246 #ifdef SCICN_SPEED 247 int scicn_speed = SCICN_SPEED; 248 #else 249 int scicn_speed = 9600; 250 #endif 251 252 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 253 254 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 255 #ifdef __NO_SOFT_SERIAL_INTERRUPT 256 volatile int sci_softintr_scheduled; 257 struct callout sci_soft_ch = CALLOUT_INITIALIZER; 258 #endif 259 #endif 260 261 u_int sci_rbuf_size = SCI_RING_SIZE; 262 263 CFATTACH_DECL(sci, sizeof(struct sci_softc), 264 sci_match, sci_attach, NULL, NULL); 265 266 extern struct cfdriver sci_cd; 267 268 dev_type_open(sciopen); 269 dev_type_close(sciclose); 270 dev_type_read(sciread); 271 dev_type_write(sciwrite); 272 dev_type_ioctl(sciioctl); 273 dev_type_stop(scistop); 274 dev_type_tty(scitty); 275 dev_type_poll(scipoll); 276 277 const struct cdevsw sci_cdevsw = { 278 sciopen, sciclose, sciread, sciwrite, sciioctl, 279 scistop, scitty, scipoll, nommap, ttykqfilter, D_TTY 280 }; 281 282 void InitializeSci (unsigned int); 283 284 /* 285 * following functions are debugging prupose only 286 */ 287 #define CR 0x0D 288 #define I2C_ADRS (*(volatile unsigned int *)0xa8000000) 289 #define USART_ON (unsigned int)~0x08 290 291 void sci_putc(unsigned char); 292 unsigned char sci_getc(void); 293 int SciErrCheck(void); 294 295 /* 296 * InitializeSci 297 * : unsigned int bps; 298 * : SCI(Serial Communication Interface) 299 */ 300 301 void 302 InitializeSci(unsigned int bps) 303 { 304 305 /* Initialize SCR */ 306 SHREG_SCSCR = 0x00; 307 308 /* Serial Mode Register */ 309 SHREG_SCSMR = 0x00; /* Async,8bit,NonParity,Even,1Stop,NoMulti */ 310 311 /* Bit Rate Register */ 312 SHREG_SCBRR = divrnd(sh_clock_get_pclock(), 32 * bps) - 1; 313 314 /* 315 * wait 1mSec, because Send/Recv must begin 1 bit period after 316 * BRR is set. 317 */ 318 delay(1000); 319 320 /* Send permission, Receive permission ON */ 321 SHREG_SCSCR = SCSCR_TE | SCSCR_RE; 322 323 /* Serial Status Register */ 324 SHREG_SCSSR &= SCSSR_TDRE; /* Clear Status */ 325 326 #if 0 327 I2C_ADRS &= ~0x08; /* enable RS-232C */ 328 #endif 329 } 330 331 332 /* 333 * sci_putc 334 * : unsigned char c; 335 */ 336 void 337 sci_putc(unsigned char c) 338 { 339 340 /* wait for ready */ 341 while ((SHREG_SCSSR & SCSSR_TDRE) == NULL) 342 ; 343 344 /* write send data to send register */ 345 SHREG_SCTDR = c; 346 347 /* clear ready flag */ 348 SHREG_SCSSR &= ~SCSSR_TDRE; 349 } 350 351 /* 352 * : SciErrCheck 353 * 0x20 = over run 354 * 0x10 = frame error 355 * 0x80 = parity error 356 */ 357 int 358 SciErrCheck(void) 359 { 360 361 return(SHREG_SCSSR & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)); 362 } 363 364 /* 365 * sci_getc 366 */ 367 unsigned char 368 sci_getc(void) 369 { 370 unsigned char c, err_c; 371 372 while (((err_c = SHREG_SCSSR) 373 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) == 0) 374 ; 375 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 376 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 377 return(err_c |= 0x80); 378 } 379 380 c = SHREG_SCRDR; 381 382 SHREG_SCSSR &= ~SCSSR_RDRF; 383 384 return(c); 385 } 386 387 #if 0 388 #define SCI_MAX_UNITS 2 389 #else 390 #define SCI_MAX_UNITS 1 391 #endif 392 393 394 static int 395 sci_match(struct device *parent, struct cfdata *cfp, void *aux) 396 { 397 398 if (strcmp(cfp->cf_name, "sci") 399 || cfp->cf_unit >= SCI_MAX_UNITS) //XXX __BROKEN_CONFIG_UNIT_USAGE 400 return 0; 401 402 return 1; 403 } 404 405 static void 406 sci_attach(struct device *parent, struct device *self, void *aux) 407 { 408 struct sci_softc *sc = (struct sci_softc *)self; 409 struct tty *tp; 410 411 sc->sc_hwflags = 0; /* XXX */ 412 sc->sc_swflags = 0; /* XXX */ 413 sc->sc_fifolen = 0; /* XXX */ 414 415 if (sciisconsole) { 416 SET(sc->sc_hwflags, SCI_HW_CONSOLE); 417 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 418 printf("\n%s: console\n", sc->sc_dev.dv_xname); 419 } else { 420 InitializeSci(9600); 421 printf("\n"); 422 } 423 424 callout_init(&sc->sc_diag_ch); 425 426 intc_intr_establish(SH_INTEVT_SCI_ERI, IST_LEVEL, IPL_SERIAL, sciintr, 427 sc); 428 intc_intr_establish(SH_INTEVT_SCI_RXI, IST_LEVEL, IPL_SERIAL, sciintr, 429 sc); 430 intc_intr_establish(SH_INTEVT_SCI_TXI, IST_LEVEL, IPL_SERIAL, sciintr, 431 sc); 432 intc_intr_establish(SH_INTEVT_SCI_TEI, IST_LEVEL, IPL_SERIAL, sciintr, 433 sc); 434 435 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 436 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, scisoft, sc); 437 #endif 438 SET(sc->sc_hwflags, SCI_HW_DEV_OK); 439 440 tp = ttymalloc(); 441 tp->t_oproc = scistart; 442 tp->t_param = sciparam; 443 tp->t_hwiflow = NULL; 444 445 sc->sc_tty = tp; 446 sc->sc_rbuf = malloc(sci_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 447 if (sc->sc_rbuf == NULL) { 448 printf("%s: unable to allocate ring buffer\n", 449 sc->sc_dev.dv_xname); 450 return; 451 } 452 sc->sc_ebuf = sc->sc_rbuf + (sci_rbuf_size << 1); 453 454 tty_attach(tp); 455 } 456 457 /* 458 * Start or restart transmission. 459 */ 460 static void 461 scistart(struct tty *tp) 462 { 463 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 464 int s; 465 466 s = spltty(); 467 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 468 goto out; 469 if (sc->sc_tx_stopped) 470 goto out; 471 472 if (tp->t_outq.c_cc <= tp->t_lowat) { 473 if (ISSET(tp->t_state, TS_ASLEEP)) { 474 CLR(tp->t_state, TS_ASLEEP); 475 wakeup(&tp->t_outq); 476 } 477 selwakeup(&tp->t_wsel); 478 if (tp->t_outq.c_cc == 0) 479 goto out; 480 } 481 482 /* Grab the first contiguous region of buffer space. */ 483 { 484 u_char *tba; 485 int tbc; 486 487 tba = tp->t_outq.c_cf; 488 tbc = ndqb(&tp->t_outq, 0); 489 490 (void)splserial(); 491 492 sc->sc_tba = tba; 493 sc->sc_tbc = tbc; 494 } 495 496 SET(tp->t_state, TS_BUSY); 497 sc->sc_tx_busy = 1; 498 499 /* Enable transmit completion interrupts if necessary. */ 500 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 501 502 /* Output the first byte of the contiguous buffer. */ 503 { 504 if (sc->sc_tbc > 0) { 505 sci_putc(*(sc->sc_tba)); 506 sc->sc_tba++; 507 sc->sc_tbc--; 508 } 509 } 510 out: 511 splx(s); 512 return; 513 } 514 515 /* 516 * Set SCI tty parameters from termios. 517 * XXX - Should just copy the whole termios after 518 * making sure all the changes could be done. 519 */ 520 static int 521 sciparam(struct tty *tp, struct termios *t) 522 { 523 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 524 int ospeed = t->c_ospeed; 525 int s; 526 527 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 528 return (EIO); 529 530 /* Check requested parameters. */ 531 if (ospeed < 0) 532 return (EINVAL); 533 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 534 return (EINVAL); 535 536 /* 537 * For the console, always force CLOCAL and !HUPCL, so that the port 538 * is always active. 539 */ 540 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 541 ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 542 SET(t->c_cflag, CLOCAL); 543 CLR(t->c_cflag, HUPCL); 544 } 545 546 /* 547 * If there were no changes, don't do anything. This avoids dropping 548 * input and improves performance when all we did was frob things like 549 * VMIN and VTIME. 550 */ 551 if (tp->t_ospeed == t->c_ospeed && 552 tp->t_cflag == t->c_cflag) 553 return (0); 554 555 #if 0 556 /* XXX (msaitoh) */ 557 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 558 #endif 559 560 s = splserial(); 561 562 /* 563 * Set the FIFO threshold based on the receive speed. 564 * 565 * * If it's a low speed, it's probably a mouse or some other 566 * interactive device, so set the threshold low. 567 * * If it's a high speed, trim the trigger level down to prevent 568 * overflows. 569 * * Otherwise set it a bit higher. 570 */ 571 #if 0 572 /* XXX (msaitoh) */ 573 if (ISSET(sc->sc_hwflags, SCI_HW_HAYESP)) 574 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 575 else if (ISSET(sc->sc_hwflags, SCI_HW_FIFO)) 576 sc->sc_fifo = FIFO_ENABLE | 577 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 578 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 579 else 580 sc->sc_fifo = 0; 581 #endif 582 583 /* And copy to tty. */ 584 tp->t_ispeed = 0; 585 tp->t_ospeed = t->c_ospeed; 586 tp->t_cflag = t->c_cflag; 587 588 if (!sc->sc_heldchange) { 589 if (sc->sc_tx_busy) { 590 sc->sc_heldtbc = sc->sc_tbc; 591 sc->sc_tbc = 0; 592 sc->sc_heldchange = 1; 593 } 594 #if 0 595 /* XXX (msaitoh) */ 596 else 597 sci_loadchannelregs(sc); 598 #endif 599 } 600 601 if (!ISSET(t->c_cflag, CHWFLOW)) { 602 /* Disable the high water mark. */ 603 sc->sc_r_hiwat = 0; 604 sc->sc_r_lowat = 0; 605 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 606 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 607 sci_schedrx(sc); 608 } 609 } else { 610 sc->sc_r_hiwat = sci_rbuf_hiwat; 611 sc->sc_r_lowat = sci_rbuf_lowat; 612 } 613 614 splx(s); 615 616 #ifdef SCI_DEBUG 617 if (sci_debug) 618 scistatus(sc, "sciparam "); 619 #endif 620 621 if (!ISSET(t->c_cflag, CHWFLOW)) { 622 if (sc->sc_tx_stopped) { 623 sc->sc_tx_stopped = 0; 624 scistart(tp); 625 } 626 } 627 628 return (0); 629 } 630 631 void 632 sci_iflush(struct sci_softc *sc) 633 { 634 unsigned char err_c; 635 volatile unsigned char c; 636 637 if (((err_c = SHREG_SCSSR) 638 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 639 640 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 641 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 642 return; 643 } 644 645 c = SHREG_SCRDR; 646 647 SHREG_SCSSR &= ~SCSSR_RDRF; 648 } 649 } 650 651 int 652 sciopen(dev_t dev, int flag, int mode, struct proc *p) 653 { 654 int unit = SCIUNIT(dev); 655 struct sci_softc *sc; 656 struct tty *tp; 657 int s, s2; 658 int error; 659 660 if (unit >= sci_cd.cd_ndevs) 661 return (ENXIO); 662 sc = sci_cd.cd_devs[unit]; 663 if (sc == 0 || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK) || 664 sc->sc_rbuf == NULL) 665 return (ENXIO); 666 667 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 668 return (ENXIO); 669 670 #ifdef KGDB 671 /* 672 * If this is the kgdb port, no other use is permitted. 673 */ 674 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) 675 return (EBUSY); 676 #endif 677 678 tp = sc->sc_tty; 679 680 if (ISSET(tp->t_state, TS_ISOPEN) && 681 ISSET(tp->t_state, TS_XCLUDE) && 682 p->p_ucred->cr_uid != 0) 683 return (EBUSY); 684 685 s = spltty(); 686 687 /* 688 * Do the following iff this is a first open. 689 */ 690 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 691 struct termios t; 692 693 tp->t_dev = dev; 694 695 s2 = splserial(); 696 697 /* Turn on interrupts. */ 698 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 699 700 splx(s2); 701 702 /* 703 * Initialize the termios status to the defaults. Add in the 704 * sticky bits from TIOCSFLAGS. 705 */ 706 t.c_ispeed = 0; 707 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 708 t.c_ospeed = scicn_speed; 709 t.c_cflag = sciconscflag; 710 } else { 711 t.c_ospeed = TTYDEF_SPEED; 712 t.c_cflag = TTYDEF_CFLAG; 713 } 714 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 715 SET(t.c_cflag, CLOCAL); 716 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 717 SET(t.c_cflag, CRTSCTS); 718 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 719 SET(t.c_cflag, MDMBUF); 720 /* Make sure sciparam() will do something. */ 721 tp->t_ospeed = 0; 722 (void) sciparam(tp, &t); 723 tp->t_iflag = TTYDEF_IFLAG; 724 tp->t_oflag = TTYDEF_OFLAG; 725 tp->t_lflag = TTYDEF_LFLAG; 726 ttychars(tp); 727 ttsetwater(tp); 728 729 s2 = splserial(); 730 731 /* Clear the input ring, and unblock. */ 732 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 733 sc->sc_rbavail = sci_rbuf_size; 734 sci_iflush(sc); 735 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 736 #if 0 737 /* XXX (msaitoh) */ 738 sci_hwiflow(sc); 739 #endif 740 741 #ifdef SCI_DEBUG 742 if (sci_debug) 743 scistatus(sc, "sciopen "); 744 #endif 745 746 splx(s2); 747 } 748 749 splx(s); 750 751 error = ttyopen(tp, SCIDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 752 if (error) 753 goto bad; 754 755 error = (*tp->t_linesw->l_open)(dev, tp); 756 if (error) 757 goto bad; 758 759 return (0); 760 761 bad: 762 763 return (error); 764 } 765 766 int 767 sciclose(dev_t dev, int flag, int mode, struct proc *p) 768 { 769 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 770 struct tty *tp = sc->sc_tty; 771 772 /* XXX This is for cons.c. */ 773 if (!ISSET(tp->t_state, TS_ISOPEN)) 774 return (0); 775 776 (*tp->t_linesw->l_close)(tp, flag); 777 ttyclose(tp); 778 779 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 780 return (0); 781 782 return (0); 783 } 784 785 int 786 sciread(dev_t dev, struct uio *uio, int flag) 787 { 788 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 789 struct tty *tp = sc->sc_tty; 790 791 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 792 } 793 794 int 795 sciwrite(dev_t dev, struct uio *uio, int flag) 796 { 797 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 798 struct tty *tp = sc->sc_tty; 799 800 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 801 } 802 803 int 804 scipoll(dev_t dev, int events, struct proc *p) 805 { 806 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 807 struct tty *tp = sc->sc_tty; 808 809 return ((*tp->t_linesw->l_poll)(tp, events, p)); 810 } 811 812 struct tty * 813 scitty(dev_t dev) 814 { 815 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 816 struct tty *tp = sc->sc_tty; 817 818 return (tp); 819 } 820 821 int 822 sciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 823 { 824 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 825 struct tty *tp = sc->sc_tty; 826 int error; 827 int s; 828 829 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 830 return (EIO); 831 832 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 833 if (error != EPASSTHROUGH) 834 return (error); 835 836 error = ttioctl(tp, cmd, data, flag, p); 837 if (error != EPASSTHROUGH) 838 return (error); 839 840 error = 0; 841 842 s = splserial(); 843 844 switch (cmd) { 845 case TIOCSBRK: 846 sci_break(sc, 1); 847 break; 848 849 case TIOCCBRK: 850 sci_break(sc, 0); 851 break; 852 853 case TIOCGFLAGS: 854 *(int *)data = sc->sc_swflags; 855 break; 856 857 case TIOCSFLAGS: 858 error = suser(p->p_ucred, &p->p_acflag); 859 if (error) 860 break; 861 sc->sc_swflags = *(int *)data; 862 break; 863 864 default: 865 error = EPASSTHROUGH; 866 break; 867 } 868 869 splx(s); 870 871 return (error); 872 } 873 874 integrate void 875 sci_schedrx(struct sci_softc *sc) 876 { 877 878 sc->sc_rx_ready = 1; 879 880 /* Wake up the poller. */ 881 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 882 softintr_schedule(sc->sc_si); 883 #else 884 #ifndef __NO_SOFT_SERIAL_INTERRUPT 885 setsoftserial(); 886 #else 887 if (!sci_softintr_scheduled) { 888 sci_softintr_scheduled = 1; 889 callout_reset(&sci_soft_ch, 1, scisoft, NULL); 890 } 891 #endif 892 #endif 893 } 894 895 void 896 sci_break(struct sci_softc *sc, int onoff) 897 { 898 899 if (onoff) 900 SHREG_SCSSR &= ~SCSSR_TDRE; 901 else 902 SHREG_SCSSR |= SCSSR_TDRE; 903 904 #if 0 /* XXX */ 905 if (!sc->sc_heldchange) { 906 if (sc->sc_tx_busy) { 907 sc->sc_heldtbc = sc->sc_tbc; 908 sc->sc_tbc = 0; 909 sc->sc_heldchange = 1; 910 } else 911 sci_loadchannelregs(sc); 912 } 913 #endif 914 } 915 916 /* 917 * Stop output, e.g., for ^S or output flush. 918 */ 919 void 920 scistop(struct tty *tp, int flag) 921 { 922 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 923 int s; 924 925 s = splserial(); 926 if (ISSET(tp->t_state, TS_BUSY)) { 927 /* Stop transmitting at the next chunk. */ 928 sc->sc_tbc = 0; 929 sc->sc_heldtbc = 0; 930 if (!ISSET(tp->t_state, TS_TTSTOP)) 931 SET(tp->t_state, TS_FLUSH); 932 } 933 splx(s); 934 } 935 936 void 937 scidiag(void *arg) 938 { 939 struct sci_softc *sc = arg; 940 int overflows, floods; 941 int s; 942 943 s = splserial(); 944 overflows = sc->sc_overflows; 945 sc->sc_overflows = 0; 946 floods = sc->sc_floods; 947 sc->sc_floods = 0; 948 sc->sc_errors = 0; 949 splx(s); 950 951 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 952 sc->sc_dev.dv_xname, 953 overflows, overflows == 1 ? "" : "s", 954 floods, floods == 1 ? "" : "s"); 955 } 956 957 integrate void 958 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 959 { 960 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 961 u_char *get, *end; 962 u_int cc, scc; 963 u_char ssr; 964 int code; 965 int s; 966 967 end = sc->sc_ebuf; 968 get = sc->sc_rbget; 969 scc = cc = sci_rbuf_size - sc->sc_rbavail; 970 971 if (cc == sci_rbuf_size) { 972 sc->sc_floods++; 973 if (sc->sc_errors++ == 0) 974 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 975 } 976 977 while (cc) { 978 code = get[0]; 979 ssr = get[1]; 980 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 981 if (ISSET(ssr, SCSSR_FER)) 982 SET(code, TTY_FE); 983 if (ISSET(ssr, SCSSR_PER)) 984 SET(code, TTY_PE); 985 } 986 if ((*rint)(code, tp) == -1) { 987 /* 988 * The line discipline's buffer is out of space. 989 */ 990 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 991 /* 992 * We're either not using flow control, or the 993 * line discipline didn't tell us to block for 994 * some reason. Either way, we have no way to 995 * know when there's more space available, so 996 * just drop the rest of the data. 997 */ 998 get += cc << 1; 999 if (get >= end) 1000 get -= sci_rbuf_size << 1; 1001 cc = 0; 1002 } else { 1003 /* 1004 * Don't schedule any more receive processing 1005 * until the line discipline tells us there's 1006 * space available (through scihwiflow()). 1007 * Leave the rest of the data in the input 1008 * buffer. 1009 */ 1010 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1011 } 1012 break; 1013 } 1014 get += 2; 1015 if (get >= end) 1016 get = sc->sc_rbuf; 1017 cc--; 1018 } 1019 1020 if (cc != scc) { 1021 sc->sc_rbget = get; 1022 s = splserial(); 1023 cc = sc->sc_rbavail += scc - cc; 1024 /* Buffers should be ok again, release possible block. */ 1025 if (cc >= sc->sc_r_lowat) { 1026 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1027 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1028 SHREG_SCSCR |= SCSCR_RIE; 1029 } 1030 #if 0 1031 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1032 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1033 sci_hwiflow(sc); 1034 } 1035 #endif 1036 } 1037 splx(s); 1038 } 1039 } 1040 1041 integrate void 1042 sci_txsoft(sc, tp) 1043 struct sci_softc *sc; 1044 struct tty *tp; 1045 { 1046 1047 CLR(tp->t_state, TS_BUSY); 1048 if (ISSET(tp->t_state, TS_FLUSH)) 1049 CLR(tp->t_state, TS_FLUSH); 1050 else 1051 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1052 (*tp->t_linesw->l_start)(tp); 1053 } 1054 1055 integrate void 1056 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1057 { 1058 #if 0 1059 /* XXX (msaitoh) */ 1060 u_char msr, delta; 1061 int s; 1062 1063 s = splserial(); 1064 msr = sc->sc_msr; 1065 delta = sc->sc_msr_delta; 1066 sc->sc_msr_delta = 0; 1067 splx(s); 1068 1069 if (ISSET(delta, sc->sc_msr_dcd)) { 1070 /* 1071 * Inform the tty layer that carrier detect changed. 1072 */ 1073 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1074 } 1075 1076 if (ISSET(delta, sc->sc_msr_cts)) { 1077 /* Block or unblock output according to flow control. */ 1078 if (ISSET(msr, sc->sc_msr_cts)) { 1079 sc->sc_tx_stopped = 0; 1080 (*tp->t_linesw->l_start)(tp); 1081 } else { 1082 sc->sc_tx_stopped = 1; 1083 } 1084 } 1085 1086 #ifdef SCI_DEBUG 1087 if (sci_debug) 1088 scistatus(sc, "sci_stsoft"); 1089 #endif 1090 #endif 1091 } 1092 1093 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1094 void 1095 scisoft(void *arg) 1096 { 1097 struct sci_softc *sc = arg; 1098 struct tty *tp; 1099 1100 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1101 return; 1102 1103 { 1104 #else 1105 void 1106 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1107 scisoft() 1108 #else 1109 scisoft(void *arg) 1110 #endif 1111 { 1112 struct sci_softc *sc; 1113 struct tty *tp; 1114 int unit; 1115 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1116 int s; 1117 1118 s = splsoftserial(); 1119 sci_softintr_scheduled = 0; 1120 #endif 1121 1122 for (unit = 0; unit < sci_cd.cd_ndevs; unit++) { 1123 sc = sci_cd.cd_devs[unit]; 1124 if (sc == NULL || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK)) 1125 continue; 1126 1127 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1128 continue; 1129 1130 tp = sc->sc_tty; 1131 if (tp == NULL) 1132 continue; 1133 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1134 continue; 1135 #endif 1136 tp = sc->sc_tty; 1137 1138 if (sc->sc_rx_ready) { 1139 sc->sc_rx_ready = 0; 1140 sci_rxsoft(sc, tp); 1141 } 1142 1143 #if 0 1144 if (sc->sc_st_check) { 1145 sc->sc_st_check = 0; 1146 sci_stsoft(sc, tp); 1147 } 1148 #endif 1149 1150 if (sc->sc_tx_done) { 1151 sc->sc_tx_done = 0; 1152 sci_txsoft(sc, tp); 1153 } 1154 } 1155 1156 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1157 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1158 splx(s); 1159 #endif 1160 #endif 1161 } 1162 1163 int 1164 sciintr(void *arg) 1165 { 1166 struct sci_softc *sc = arg; 1167 u_char *put, *end; 1168 u_int cc; 1169 u_short ssr; 1170 1171 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1172 return (0); 1173 1174 end = sc->sc_ebuf; 1175 put = sc->sc_rbput; 1176 cc = sc->sc_rbavail; 1177 1178 do { 1179 ssr = SHREG_SCSSR; 1180 if (ISSET(ssr, SCSSR_FER)) { 1181 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_PER | SCSSR_FER); 1182 #if defined(DDB) || defined(KGDB) 1183 #ifdef SH4 1184 if ((SHREG_SCSPTR & SCSPTR_SPB0DT) != 0) { 1185 #else 1186 if ((SHREG_SCSPDR & SCSPDR_SCP0DT) != 0) { 1187 #endif 1188 #ifdef DDB 1189 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 1190 console_debugger(); 1191 } 1192 #endif 1193 #ifdef KGDB 1194 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) { 1195 kgdb_connect(1); 1196 } 1197 #endif 1198 } 1199 #endif /* DDB || KGDB */ 1200 } 1201 if ((SHREG_SCSSR & SCSSR_RDRF) != 0) { 1202 if (cc > 0) { 1203 put[0] = SHREG_SCRDR; 1204 put[1] = SHREG_SCSSR & 0x00ff; 1205 1206 put += 2; 1207 if (put >= end) 1208 put = sc->sc_rbuf; 1209 cc--; 1210 } 1211 1212 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1213 SCSSR_RDRF); 1214 1215 /* 1216 * Current string of incoming characters ended because 1217 * no more data was available or we ran out of space. 1218 * Schedule a receive event if any data was received. 1219 * If we're out of space, turn off receive interrupts. 1220 */ 1221 sc->sc_rbput = put; 1222 sc->sc_rbavail = cc; 1223 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1224 sc->sc_rx_ready = 1; 1225 1226 /* 1227 * See if we are in danger of overflowing a buffer. If 1228 * so, use hardware flow control to ease the pressure. 1229 */ 1230 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1231 cc < sc->sc_r_hiwat) { 1232 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1233 #if 0 1234 sci_hwiflow(sc); 1235 #endif 1236 } 1237 1238 /* 1239 * If we're out of space, disable receive interrupts 1240 * until the queue has drained a bit. 1241 */ 1242 if (!cc) { 1243 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1244 SHREG_SCSCR &= ~SCSCR_RIE; 1245 } 1246 } else { 1247 if (SHREG_SCSSR & SCSSR_RDRF) { 1248 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1249 delay(10); 1250 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 1251 continue; 1252 } 1253 } 1254 } while (SHREG_SCSSR & SCSSR_RDRF); 1255 1256 #if 0 1257 msr = bus_space_read_1(iot, ioh, sci_msr); 1258 delta = msr ^ sc->sc_msr; 1259 sc->sc_msr = msr; 1260 if (ISSET(delta, sc->sc_msr_mask)) { 1261 SET(sc->sc_msr_delta, delta); 1262 1263 /* 1264 * Pulse-per-second clock signal on edge of DCD? 1265 */ 1266 if (ISSET(delta, sc->sc_ppsmask)) { 1267 struct timeval tv; 1268 if (ISSET(msr, sc->sc_ppsmask) == 1269 sc->sc_ppsassert) { 1270 /* XXX nanotime() */ 1271 microtime(&tv); 1272 TIMEVAL_TO_TIMESPEC(&tv, 1273 &sc->ppsinfo.assert_timestamp); 1274 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1275 timespecadd(&sc->ppsinfo.assert_timestamp, 1276 &sc->ppsparam.assert_offset, 1277 &sc->ppsinfo.assert_timestamp); 1278 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1279 } 1280 1281 #ifdef PPS_SYNC 1282 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1283 hardpps(&tv, tv.tv_usec); 1284 #endif 1285 sc->ppsinfo.assert_sequence++; 1286 sc->ppsinfo.current_mode = 1287 sc->ppsparam.mode; 1288 1289 } else if (ISSET(msr, sc->sc_ppsmask) == 1290 sc->sc_ppsclear) { 1291 /* XXX nanotime() */ 1292 microtime(&tv); 1293 TIMEVAL_TO_TIMESPEC(&tv, 1294 &sc->ppsinfo.clear_timestamp); 1295 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1296 timespecadd(&sc->ppsinfo.clear_timestamp, 1297 &sc->ppsparam.clear_offset, 1298 &sc->ppsinfo.clear_timestamp); 1299 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1300 } 1301 1302 #ifdef PPS_SYNC 1303 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1304 hardpps(&tv, tv.tv_usec); 1305 #endif 1306 sc->ppsinfo.clear_sequence++; 1307 sc->ppsinfo.current_mode = 1308 sc->ppsparam.mode; 1309 } 1310 } 1311 1312 /* 1313 * Stop output immediately if we lose the output 1314 * flow control signal or carrier detect. 1315 */ 1316 if (ISSET(~msr, sc->sc_msr_mask)) { 1317 sc->sc_tbc = 0; 1318 sc->sc_heldtbc = 0; 1319 #ifdef SCI_DEBUG 1320 if (sci_debug) 1321 scistatus(sc, "sciintr "); 1322 #endif 1323 } 1324 1325 sc->sc_st_check = 1; 1326 } 1327 #endif 1328 1329 /* 1330 * Done handling any receive interrupts. See if data can be 1331 * transmitted as well. Schedule tx done event if no data left 1332 * and tty was marked busy. 1333 */ 1334 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1335 /* 1336 * If we've delayed a parameter change, do it now, and restart 1337 * output. 1338 */ 1339 if (sc->sc_heldchange) { 1340 sc->sc_heldchange = 0; 1341 sc->sc_tbc = sc->sc_heldtbc; 1342 sc->sc_heldtbc = 0; 1343 } 1344 1345 /* Output the next chunk of the contiguous buffer, if any. */ 1346 if (sc->sc_tbc > 0) { 1347 sci_putc(*(sc->sc_tba)); 1348 sc->sc_tba++; 1349 sc->sc_tbc--; 1350 } else { 1351 /* Disable transmit completion interrupts if necessary. */ 1352 #if 0 1353 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1354 #endif 1355 SHREG_SCSCR &= ~SCSCR_TIE; 1356 1357 if (sc->sc_tx_busy) { 1358 sc->sc_tx_busy = 0; 1359 sc->sc_tx_done = 1; 1360 } 1361 } 1362 } 1363 1364 /* Wake up the poller. */ 1365 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1366 softintr_schedule(sc->sc_si); 1367 #else 1368 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1369 setsoftserial(); 1370 #else 1371 if (!sci_softintr_scheduled) { 1372 sci_softintr_scheduled = 1; 1373 callout_reset(&sci_soft_ch, 1, scisoft, 1); 1374 } 1375 #endif 1376 #endif 1377 1378 #if NRND > 0 && defined(RND_SCI) 1379 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1380 #endif 1381 1382 return (1); 1383 } 1384 1385 void 1386 scicnprobe(cp) 1387 struct consdev *cp; 1388 { 1389 int maj; 1390 1391 /* locate the major number */ 1392 maj = cdevsw_lookup_major(&sci_cdevsw); 1393 1394 /* Initialize required fields. */ 1395 cp->cn_dev = makedev(maj, 0); 1396 #ifdef SCICONSOLE 1397 cp->cn_pri = CN_REMOTE; 1398 #else 1399 cp->cn_pri = CN_NORMAL; 1400 #endif 1401 } 1402 1403 void 1404 scicninit(struct consdev *cp) 1405 { 1406 1407 InitializeSci(scicn_speed); 1408 sciisconsole = 1; 1409 } 1410 1411 int 1412 scicngetc(dev_t dev) 1413 { 1414 int c; 1415 int s; 1416 1417 s = splserial(); 1418 c = sci_getc(); 1419 splx(s); 1420 1421 return (c); 1422 } 1423 1424 void 1425 scicnputc(dev_t dev, int c) 1426 { 1427 int s; 1428 1429 s = splserial(); 1430 sci_putc((u_char)c); 1431 splx(s); 1432 } 1433
Indexes created Thu Sep 25 06:09:39 GMT 2025