sci.c revision 1.18
1 /* $NetBSD: sci.c,v 1.18 2002/02/12 15:26:46 uch 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 <machine/cpu.h> 123 #include <sh3/pclock.h> 124 #include <sh3/scireg.h> 125 #include <sh3/tmureg.h> 126 127 #include <machine/shbvar.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_ih; 143 144 struct callout sc_diag_ch; 145 146 #if 0 147 bus_space_tag_t sc_iot; /* ISA i/o space identifier */ 148 bus_space_handle_t sc_ioh; /* ISA io handle */ 149 150 int sc_drq; 151 152 int sc_frequency; 153 #endif 154 155 u_int sc_overflows, 156 sc_floods, 157 sc_errors; /* number of retries so far */ 158 u_char sc_status[7]; /* copy of registers */ 159 160 int sc_hwflags; 161 int sc_swflags; 162 u_int sc_fifolen; /* XXX always 0? */ 163 164 u_int sc_r_hiwat, 165 sc_r_lowat; 166 u_char *volatile sc_rbget, 167 *volatile sc_rbput; 168 volatile u_int sc_rbavail; 169 u_char *sc_rbuf, 170 *sc_ebuf; 171 172 u_char *sc_tba; /* transmit buffer address */ 173 u_int sc_tbc, /* transmit byte count */ 174 sc_heldtbc; 175 176 volatile u_char sc_rx_flags, /* receiver blocked */ 177 #define RX_TTY_BLOCKED 0x01 178 #define RX_TTY_OVERFLOWED 0x02 179 #define RX_IBUF_BLOCKED 0x04 180 #define RX_IBUF_OVERFLOWED 0x08 181 #define RX_ANY_BLOCK 0x0f 182 sc_tx_busy, /* working on an output chunk */ 183 sc_tx_done, /* done with one output chunk */ 184 sc_tx_stopped, /* H/W level stop (lost CTS) */ 185 sc_st_check, /* got a status interrupt */ 186 sc_rx_ready; 187 188 volatile u_char sc_heldchange; 189 }; 190 191 /* controller driver configuration */ 192 static int sci_match(struct device *, struct cfdata *, void *); 193 static void sci_attach(struct device *, struct device *, void *); 194 195 void sci_break(struct sci_softc *, int); 196 void sci_iflush(struct sci_softc *); 197 198 #define integrate static inline 199 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 200 void scisoft(void *); 201 #else 202 #ifndef __NO_SOFT_SERIAL_INTERRUPT 203 void scisoft(void); 204 #else 205 void scisoft(void *); 206 #endif 207 #endif 208 integrate void sci_rxsoft(struct sci_softc *, struct tty *); 209 integrate void sci_txsoft(struct sci_softc *, struct tty *); 210 integrate void sci_stsoft(struct sci_softc *, struct tty *); 211 integrate void sci_schedrx(struct sci_softc *); 212 void scidiag(void *); 213 214 #define SCIUNIT_MASK 0x7ffff 215 #define SCIDIALOUT_MASK 0x80000 216 217 #define SCIUNIT(x) (minor(x) & SCIUNIT_MASK) 218 #define SCIDIALOUT(x) (minor(x) & SCIDIALOUT_MASK) 219 220 /* Macros to clear/set/test flags. */ 221 #define SET(t, f) (t) |= (f) 222 #define CLR(t, f) (t) &= ~(f) 223 #define ISSET(t, f) ((t) & (f)) 224 225 /* Hardware flag masks */ 226 #define SCI_HW_NOIEN 0x01 227 #define SCI_HW_FIFO 0x02 228 #define SCI_HW_FLOW 0x08 229 #define SCI_HW_DEV_OK 0x20 230 #define SCI_HW_CONSOLE 0x40 231 #define SCI_HW_KGDB 0x80 232 233 /* Buffer size for character buffer */ 234 #define SCI_RING_SIZE 2048 235 236 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 237 u_int sci_rbuf_hiwat = (SCI_RING_SIZE * 1) / 4; 238 u_int sci_rbuf_lowat = (SCI_RING_SIZE * 3) / 4; 239 240 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 241 int sciconscflag = CONMODE; 242 int sciisconsole = 0; 243 244 #ifdef SCICN_SPEED 245 int scicn_speed = SCICN_SPEED; 246 #else 247 int scicn_speed = 9600; 248 #endif 249 250 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 251 252 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 253 #ifdef __NO_SOFT_SERIAL_INTERRUPT 254 volatile int sci_softintr_scheduled; 255 struct callout sci_soft_ch = CALLOUT_INITIALIZER; 256 #endif 257 #endif 258 259 u_int sci_rbuf_size = SCI_RING_SIZE; 260 261 struct cfattach sci_ca = { 262 sizeof(struct sci_softc), sci_match, sci_attach 263 }; 264 265 extern struct cfdriver sci_cd; 266 267 cdev_decl(sci); 268 269 void InitializeSci (unsigned int); 270 271 /* 272 * following functions are debugging prupose only 273 */ 274 #define CR 0x0D 275 #define I2C_ADRS (*(volatile unsigned int *)0xa8000000) 276 #define USART_ON (unsigned int)~0x08 277 278 static void WaitFor(int); 279 void sci_putc(unsigned char); 280 unsigned char sci_getc(void); 281 int SciErrCheck(void); 282 283 /* 284 * WaitFor 285 * : int mSec; 286 */ 287 static void 288 WaitFor(int mSec) 289 { 290 291 /* Disable Under Flow interrupt, rising edge, 1/4 */ 292 SHREG_TCR2 = 0x0000; 293 294 /* Set counter value (count down with 4 KHz) */ 295 SHREG_TCNT2 = mSec * 4; 296 297 /* start Channel2 */ 298 SHREG_TSTR |= TSTR_STR2; 299 300 /* wait for under flag ON of channel2 */ 301 while ((SHREG_TCR2 & TCR_UNF) == 0) 302 ; 303 304 /* stop channel2 */ 305 SHREG_TSTR &= ~TSTR_STR2; 306 } 307 308 /* 309 * InitializeSci 310 * : unsigned int bps; 311 * : SCI(Serial Communication Interface) 312 */ 313 314 void 315 InitializeSci(unsigned int bps) 316 { 317 318 /* Initialize SCR */ 319 SHREG_SCSCR = 0x00; 320 321 /* Serial Mode Register */ 322 SHREG_SCSMR = 0x00; /* Async,8bit,NonParity,Even,1Stop,NoMulti */ 323 324 /* Bit Rate Register */ 325 SHREG_SCBRR = divrnd(PCLOCK, 32 * bps) - 1; 326 327 /* 328 * wait 1mSec, because Send/Recv must begin 1 bit period after 329 * BRR is set. 330 */ 331 WaitFor(1); 332 333 /* Send permission, Receive permission ON */ 334 SHREG_SCSCR = SCSCR_TE | SCSCR_RE; 335 336 /* Serial Status Register */ 337 SHREG_SCSSR &= SCSSR_TDRE; /* Clear Status */ 338 339 #if 0 340 I2C_ADRS &= ~0x08; /* enable RS-232C */ 341 #endif 342 } 343 344 345 /* 346 * sci_putc 347 * : unsigned char c; 348 */ 349 void 350 sci_putc(unsigned char c) 351 { 352 353 if (c == '\n') 354 sci_putc('\r'); 355 356 /* wait for ready */ 357 while ((SHREG_SCSSR & SCSSR_TDRE) == NULL) 358 ; 359 360 /* write send data to send register */ 361 SHREG_SCTDR = c; 362 363 /* clear ready flag */ 364 SHREG_SCSSR &= ~SCSSR_TDRE; 365 } 366 367 /* 368 * : SciErrCheck 369 * 0x20 = over run 370 * 0x10 = frame error 371 * 0x80 = parity error 372 */ 373 int 374 SciErrCheck(void) 375 { 376 377 return(SHREG_SCSSR & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)); 378 } 379 380 /* 381 * sci_getc 382 */ 383 unsigned char 384 sci_getc(void) 385 { 386 unsigned char c, err_c; 387 388 while (((err_c = SHREG_SCSSR) 389 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) == 0) 390 ; 391 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 392 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 393 return(err_c |= 0x80); 394 } 395 396 c = SHREG_SCRDR; 397 398 SHREG_SCSSR &= ~SCSSR_RDRF; 399 400 return(c); 401 } 402 403 #if 0 404 #define SCI_MAX_UNITS 2 405 #else 406 #define SCI_MAX_UNITS 1 407 #endif 408 409 410 static int 411 sci_match(struct device *parent, struct cfdata *cfp, void *aux) 412 { 413 struct shb_attach_args *sa = aux; 414 415 if (strcmp(cfp->cf_driver->cd_name, "sci") 416 || cfp->cf_unit >= SCI_MAX_UNITS) 417 return 0; 418 419 sa->ia_iosize = 0x10; 420 return 1; 421 } 422 423 static void 424 sci_attach(struct device *parent, struct device *self, void *aux) 425 { 426 struct sci_softc *sc = (struct sci_softc *)self; 427 struct tty *tp; 428 int irq; 429 struct shb_attach_args *ia = aux; 430 431 sc->sc_hwflags = 0; /* XXX */ 432 sc->sc_swflags = 0; /* XXX */ 433 sc->sc_fifolen = 0; /* XXX */ 434 435 irq = ia->ia_irq; 436 437 if (sciisconsole) { 438 SET(sc->sc_hwflags, SCI_HW_CONSOLE); 439 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 440 printf("\n%s: console\n", sc->sc_dev.dv_xname); 441 } else { 442 InitializeSci(9600); 443 printf("\n"); 444 } 445 446 callout_init(&sc->sc_diag_ch); 447 448 #if 0 449 if (irq != IRQUNK) { 450 sc->sc_ih = shb_intr_establish(irq, 451 IST_EDGE, IPL_SERIAL, sciintr, sc); 452 } 453 #else 454 if (irq != IRQUNK) { 455 sc->sc_ih = shb_intr_establish(SCI_IRQ, 456 IST_EDGE, IPL_SERIAL, sciintr, sc); 457 } 458 #endif 459 460 SET(sc->sc_hwflags, SCI_HW_DEV_OK); 461 462 tp = ttymalloc(); 463 tp->t_oproc = scistart; 464 tp->t_param = sciparam; 465 tp->t_hwiflow = NULL; 466 467 sc->sc_tty = tp; 468 sc->sc_rbuf = malloc(sci_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 469 if (sc->sc_rbuf == NULL) { 470 printf("%s: unable to allocate ring buffer\n", 471 sc->sc_dev.dv_xname); 472 return; 473 } 474 sc->sc_ebuf = sc->sc_rbuf + (sci_rbuf_size << 1); 475 476 tty_attach(tp); 477 } 478 479 /* 480 * Start or restart transmission. 481 */ 482 static void 483 scistart(struct tty *tp) 484 { 485 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 486 int s; 487 488 s = spltty(); 489 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 490 goto out; 491 if (sc->sc_tx_stopped) 492 goto out; 493 494 if (tp->t_outq.c_cc <= tp->t_lowat) { 495 if (ISSET(tp->t_state, TS_ASLEEP)) { 496 CLR(tp->t_state, TS_ASLEEP); 497 wakeup(&tp->t_outq); 498 } 499 selwakeup(&tp->t_wsel); 500 if (tp->t_outq.c_cc == 0) 501 goto out; 502 } 503 504 /* Grab the first contiguous region of buffer space. */ 505 { 506 u_char *tba; 507 int tbc; 508 509 tba = tp->t_outq.c_cf; 510 tbc = ndqb(&tp->t_outq, 0); 511 512 (void)splserial(); 513 514 sc->sc_tba = tba; 515 sc->sc_tbc = tbc; 516 } 517 518 SET(tp->t_state, TS_BUSY); 519 sc->sc_tx_busy = 1; 520 521 /* Enable transmit completion interrupts if necessary. */ 522 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 523 524 /* Output the first byte of the contiguous buffer. */ 525 { 526 if (sc->sc_tbc > 0) { 527 sci_putc(*(sc->sc_tba)); 528 sc->sc_tba++; 529 sc->sc_tbc--; 530 } 531 } 532 out: 533 splx(s); 534 return; 535 } 536 537 /* 538 * Set SCI tty parameters from termios. 539 * XXX - Should just copy the whole termios after 540 * making sure all the changes could be done. 541 */ 542 static int 543 sciparam(struct tty *tp, struct termios *t) 544 { 545 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 546 int ospeed = t->c_ospeed; 547 int s; 548 549 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 550 return (EIO); 551 552 /* Check requested parameters. */ 553 if (ospeed < 0) 554 return (EINVAL); 555 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 556 return (EINVAL); 557 558 /* 559 * For the console, always force CLOCAL and !HUPCL, so that the port 560 * is always active. 561 */ 562 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 563 ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 564 SET(t->c_cflag, CLOCAL); 565 CLR(t->c_cflag, HUPCL); 566 } 567 568 /* 569 * If there were no changes, don't do anything. This avoids dropping 570 * input and improves performance when all we did was frob things like 571 * VMIN and VTIME. 572 */ 573 if (tp->t_ospeed == t->c_ospeed && 574 tp->t_cflag == t->c_cflag) 575 return (0); 576 577 #if 0 578 /* XXX (msaitoh) */ 579 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 580 #endif 581 582 s = splserial(); 583 584 /* 585 * Set the FIFO threshold based on the receive speed. 586 * 587 * * If it's a low speed, it's probably a mouse or some other 588 * interactive device, so set the threshold low. 589 * * If it's a high speed, trim the trigger level down to prevent 590 * overflows. 591 * * Otherwise set it a bit higher. 592 */ 593 #if 0 594 /* XXX (msaitoh) */ 595 if (ISSET(sc->sc_hwflags, SCI_HW_HAYESP)) 596 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 597 else if (ISSET(sc->sc_hwflags, SCI_HW_FIFO)) 598 sc->sc_fifo = FIFO_ENABLE | 599 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 600 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 601 else 602 sc->sc_fifo = 0; 603 #endif 604 605 /* And copy to tty. */ 606 tp->t_ispeed = 0; 607 tp->t_ospeed = t->c_ospeed; 608 tp->t_cflag = t->c_cflag; 609 610 if (!sc->sc_heldchange) { 611 if (sc->sc_tx_busy) { 612 sc->sc_heldtbc = sc->sc_tbc; 613 sc->sc_tbc = 0; 614 sc->sc_heldchange = 1; 615 } 616 #if 0 617 /* XXX (msaitoh) */ 618 else 619 sci_loadchannelregs(sc); 620 #endif 621 } 622 623 if (!ISSET(t->c_cflag, CHWFLOW)) { 624 /* Disable the high water mark. */ 625 sc->sc_r_hiwat = 0; 626 sc->sc_r_lowat = 0; 627 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 628 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 629 sci_schedrx(sc); 630 } 631 } else { 632 sc->sc_r_hiwat = sci_rbuf_hiwat; 633 sc->sc_r_lowat = sci_rbuf_lowat; 634 } 635 636 splx(s); 637 638 #ifdef SCI_DEBUG 639 if (sci_debug) 640 scistatus(sc, "sciparam "); 641 #endif 642 643 if (!ISSET(t->c_cflag, CHWFLOW)) { 644 if (sc->sc_tx_stopped) { 645 sc->sc_tx_stopped = 0; 646 scistart(tp); 647 } 648 } 649 650 return (0); 651 } 652 653 void 654 sci_iflush(struct sci_softc *sc) 655 { 656 unsigned char err_c; 657 volatile unsigned char c; 658 659 if (((err_c = SHREG_SCSSR) 660 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 661 662 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 663 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 664 return; 665 } 666 667 c = SHREG_SCRDR; 668 669 SHREG_SCSSR &= ~SCSSR_RDRF; 670 } 671 } 672 673 int 674 sciopen(dev_t dev, int flag, int mode, struct proc *p) 675 { 676 int unit = SCIUNIT(dev); 677 struct sci_softc *sc; 678 struct tty *tp; 679 int s, s2; 680 int error; 681 682 if (unit >= sci_cd.cd_ndevs) 683 return (ENXIO); 684 sc = sci_cd.cd_devs[unit]; 685 if (sc == 0 || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK) || 686 sc->sc_rbuf == NULL) 687 return (ENXIO); 688 689 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 690 return (ENXIO); 691 692 #ifdef KGDB 693 /* 694 * If this is the kgdb port, no other use is permitted. 695 */ 696 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) 697 return (EBUSY); 698 #endif 699 700 tp = sc->sc_tty; 701 702 if (ISSET(tp->t_state, TS_ISOPEN) && 703 ISSET(tp->t_state, TS_XCLUDE) && 704 p->p_ucred->cr_uid != 0) 705 return (EBUSY); 706 707 s = spltty(); 708 709 /* 710 * Do the following iff this is a first open. 711 */ 712 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 713 struct termios t; 714 715 tp->t_dev = dev; 716 717 s2 = splserial(); 718 719 /* Turn on interrupts. */ 720 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 721 722 splx(s2); 723 724 /* 725 * Initialize the termios status to the defaults. Add in the 726 * sticky bits from TIOCSFLAGS. 727 */ 728 t.c_ispeed = 0; 729 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 730 t.c_ospeed = scicn_speed; 731 t.c_cflag = sciconscflag; 732 } else { 733 t.c_ospeed = TTYDEF_SPEED; 734 t.c_cflag = TTYDEF_CFLAG; 735 } 736 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 737 SET(t.c_cflag, CLOCAL); 738 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 739 SET(t.c_cflag, CRTSCTS); 740 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 741 SET(t.c_cflag, MDMBUF); 742 /* Make sure sciparam() will do something. */ 743 tp->t_ospeed = 0; 744 (void) sciparam(tp, &t); 745 tp->t_iflag = TTYDEF_IFLAG; 746 tp->t_oflag = TTYDEF_OFLAG; 747 tp->t_lflag = TTYDEF_LFLAG; 748 ttychars(tp); 749 ttsetwater(tp); 750 751 s2 = splserial(); 752 753 /* Clear the input ring, and unblock. */ 754 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 755 sc->sc_rbavail = sci_rbuf_size; 756 sci_iflush(sc); 757 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 758 #if 0 759 /* XXX (msaitoh) */ 760 sci_hwiflow(sc); 761 #endif 762 763 #ifdef SCI_DEBUG 764 if (sci_debug) 765 scistatus(sc, "sciopen "); 766 #endif 767 768 splx(s2); 769 } 770 771 splx(s); 772 773 error = ttyopen(tp, SCIDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 774 if (error) 775 goto bad; 776 777 error = (*tp->t_linesw->l_open)(dev, tp); 778 if (error) 779 goto bad; 780 781 return (0); 782 783 bad: 784 785 return (error); 786 } 787 788 int 789 sciclose(dev_t dev, int flag, int mode, struct proc *p) 790 { 791 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 792 struct tty *tp = sc->sc_tty; 793 794 /* XXX This is for cons.c. */ 795 if (!ISSET(tp->t_state, TS_ISOPEN)) 796 return (0); 797 798 (*tp->t_linesw->l_close)(tp, flag); 799 ttyclose(tp); 800 801 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 802 return (0); 803 804 return (0); 805 } 806 807 int 808 sciread(dev_t dev, struct uio *uio, int flag) 809 { 810 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 811 struct tty *tp = sc->sc_tty; 812 813 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 814 } 815 816 int 817 sciwrite(dev_t dev, struct uio *uio, int flag) 818 { 819 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 820 struct tty *tp = sc->sc_tty; 821 822 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 823 } 824 825 int 826 scipoll(dev_t dev, int events, struct proc *p) 827 { 828 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 829 struct tty *tp = sc->sc_tty; 830 831 return ((*tp->t_linesw->l_poll)(tp, events, p)); 832 } 833 834 struct tty * 835 scitty(dev_t dev) 836 { 837 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 838 struct tty *tp = sc->sc_tty; 839 840 return (tp); 841 } 842 843 int 844 sciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 845 { 846 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 847 struct tty *tp = sc->sc_tty; 848 int error; 849 int s; 850 851 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 852 return (EIO); 853 854 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 855 if (error >= 0) 856 return (error); 857 858 error = ttioctl(tp, cmd, data, flag, p); 859 if (error >= 0) 860 return (error); 861 862 error = 0; 863 864 s = splserial(); 865 866 switch (cmd) { 867 case TIOCSBRK: 868 sci_break(sc, 1); 869 break; 870 871 case TIOCCBRK: 872 sci_break(sc, 0); 873 break; 874 875 case TIOCGFLAGS: 876 *(int *)data = sc->sc_swflags; 877 break; 878 879 case TIOCSFLAGS: 880 error = suser(p->p_ucred, &p->p_acflag); 881 if (error) 882 break; 883 sc->sc_swflags = *(int *)data; 884 break; 885 886 default: 887 error = ENOTTY; 888 break; 889 } 890 891 splx(s); 892 893 return (error); 894 } 895 896 integrate void 897 sci_schedrx(struct sci_softc *sc) 898 { 899 900 sc->sc_rx_ready = 1; 901 902 /* Wake up the poller. */ 903 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 904 softintr_schedule(sc->sc_si); 905 #else 906 #ifndef __NO_SOFT_SERIAL_INTERRUPT 907 setsoftserial(); 908 #else 909 if (!sci_softintr_scheduled) { 910 sci_softintr_scheduled = 1; 911 callout_reset(&sci_soft_ch, 1, scisoft, NULL); 912 } 913 #endif 914 #endif 915 } 916 917 void 918 sci_break(struct sci_softc *sc, int onoff) 919 { 920 921 if (onoff) 922 SHREG_SCSSR &= ~SCSSR_TDRE; 923 else 924 SHREG_SCSSR |= SCSSR_TDRE; 925 926 #if 0 /* XXX */ 927 if (!sc->sc_heldchange) { 928 if (sc->sc_tx_busy) { 929 sc->sc_heldtbc = sc->sc_tbc; 930 sc->sc_tbc = 0; 931 sc->sc_heldchange = 1; 932 } else 933 sci_loadchannelregs(sc); 934 } 935 #endif 936 } 937 938 /* 939 * Stop output, e.g., for ^S or output flush. 940 */ 941 void 942 scistop(struct tty *tp, int flag) 943 { 944 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 945 int s; 946 947 s = splserial(); 948 if (ISSET(tp->t_state, TS_BUSY)) { 949 /* Stop transmitting at the next chunk. */ 950 sc->sc_tbc = 0; 951 sc->sc_heldtbc = 0; 952 if (!ISSET(tp->t_state, TS_TTSTOP)) 953 SET(tp->t_state, TS_FLUSH); 954 } 955 splx(s); 956 } 957 958 void 959 scidiag(void *arg) 960 { 961 struct sci_softc *sc = arg; 962 int overflows, floods; 963 int s; 964 965 s = splserial(); 966 overflows = sc->sc_overflows; 967 sc->sc_overflows = 0; 968 floods = sc->sc_floods; 969 sc->sc_floods = 0; 970 sc->sc_errors = 0; 971 splx(s); 972 973 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 974 sc->sc_dev.dv_xname, 975 overflows, overflows == 1 ? "" : "s", 976 floods, floods == 1 ? "" : "s"); 977 } 978 979 integrate void 980 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 981 { 982 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 983 u_char *get, *end; 984 u_int cc, scc; 985 u_char ssr; 986 int code; 987 int s; 988 989 end = sc->sc_ebuf; 990 get = sc->sc_rbget; 991 scc = cc = sci_rbuf_size - sc->sc_rbavail; 992 993 if (cc == sci_rbuf_size) { 994 sc->sc_floods++; 995 if (sc->sc_errors++ == 0) 996 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 997 } 998 999 while (cc) { 1000 code = get[0]; 1001 ssr = get[1]; 1002 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 1003 if (ISSET(ssr, SCSSR_FER)) 1004 SET(code, TTY_FE); 1005 if (ISSET(ssr, SCSSR_PER)) 1006 SET(code, TTY_PE); 1007 } 1008 if ((*rint)(code, tp) == -1) { 1009 /* 1010 * The line discipline's buffer is out of space. 1011 */ 1012 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1013 /* 1014 * We're either not using flow control, or the 1015 * line discipline didn't tell us to block for 1016 * some reason. Either way, we have no way to 1017 * know when there's more space available, so 1018 * just drop the rest of the data. 1019 */ 1020 get += cc << 1; 1021 if (get >= end) 1022 get -= sci_rbuf_size << 1; 1023 cc = 0; 1024 } else { 1025 /* 1026 * Don't schedule any more receive processing 1027 * until the line discipline tells us there's 1028 * space available (through scihwiflow()). 1029 * Leave the rest of the data in the input 1030 * buffer. 1031 */ 1032 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1033 } 1034 break; 1035 } 1036 get += 2; 1037 if (get >= end) 1038 get = sc->sc_rbuf; 1039 cc--; 1040 } 1041 1042 if (cc != scc) { 1043 sc->sc_rbget = get; 1044 s = splserial(); 1045 cc = sc->sc_rbavail += scc - cc; 1046 /* Buffers should be ok again, release possible block. */ 1047 if (cc >= sc->sc_r_lowat) { 1048 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1049 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1050 SHREG_SCSCR |= SCSCR_RIE; 1051 } 1052 #if 0 1053 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1054 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1055 sci_hwiflow(sc); 1056 } 1057 #endif 1058 } 1059 splx(s); 1060 } 1061 } 1062 1063 integrate void 1064 sci_txsoft(sc, tp) 1065 struct sci_softc *sc; 1066 struct tty *tp; 1067 { 1068 1069 CLR(tp->t_state, TS_BUSY); 1070 if (ISSET(tp->t_state, TS_FLUSH)) 1071 CLR(tp->t_state, TS_FLUSH); 1072 else 1073 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1074 (*tp->t_linesw->l_start)(tp); 1075 } 1076 1077 integrate void 1078 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1079 { 1080 #if 0 1081 /* XXX (msaitoh) */ 1082 u_char msr, delta; 1083 int s; 1084 1085 s = splserial(); 1086 msr = sc->sc_msr; 1087 delta = sc->sc_msr_delta; 1088 sc->sc_msr_delta = 0; 1089 splx(s); 1090 1091 if (ISSET(delta, sc->sc_msr_dcd)) { 1092 /* 1093 * Inform the tty layer that carrier detect changed. 1094 */ 1095 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1096 } 1097 1098 if (ISSET(delta, sc->sc_msr_cts)) { 1099 /* Block or unblock output according to flow control. */ 1100 if (ISSET(msr, sc->sc_msr_cts)) { 1101 sc->sc_tx_stopped = 0; 1102 (*tp->t_linesw->l_start)(tp); 1103 } else { 1104 sc->sc_tx_stopped = 1; 1105 } 1106 } 1107 1108 #ifdef SCI_DEBUG 1109 if (sci_debug) 1110 scistatus(sc, "sci_stsoft"); 1111 #endif 1112 #endif 1113 } 1114 1115 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1116 void 1117 scisoft(void *arg) 1118 { 1119 struct sci_softc *sc = arg; 1120 struct tty *tp; 1121 1122 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1123 return; 1124 1125 { 1126 #else 1127 void 1128 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1129 scisoft() 1130 #else 1131 scisoft(void *arg) 1132 #endif 1133 { 1134 struct sci_softc *sc; 1135 struct tty *tp; 1136 int unit; 1137 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1138 int s; 1139 1140 s = splsoftserial(); 1141 sci_softintr_scheduled = 0; 1142 #endif 1143 1144 for (unit = 0; unit < sci_cd.cd_ndevs; unit++) { 1145 sc = sci_cd.cd_devs[unit]; 1146 if (sc == NULL || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK)) 1147 continue; 1148 1149 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1150 continue; 1151 1152 tp = sc->sc_tty; 1153 if (tp == NULL) 1154 continue; 1155 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1156 continue; 1157 #endif 1158 tp = sc->sc_tty; 1159 1160 if (sc->sc_rx_ready) { 1161 sc->sc_rx_ready = 0; 1162 sci_rxsoft(sc, tp); 1163 } 1164 1165 #if 0 1166 if (sc->sc_st_check) { 1167 sc->sc_st_check = 0; 1168 sci_stsoft(sc, tp); 1169 } 1170 #endif 1171 1172 if (sc->sc_tx_done) { 1173 sc->sc_tx_done = 0; 1174 sci_txsoft(sc, tp); 1175 } 1176 } 1177 1178 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1179 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1180 splx(s); 1181 #endif 1182 #endif 1183 } 1184 1185 int 1186 sciintr(void *arg) 1187 { 1188 struct sci_softc *sc = arg; 1189 u_char *put, *end; 1190 u_int cc; 1191 u_short ssr; 1192 1193 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 1194 return (0); 1195 1196 end = sc->sc_ebuf; 1197 put = sc->sc_rbput; 1198 cc = sc->sc_rbavail; 1199 1200 ssr = SHREG_SCSSR; 1201 if (ISSET(ssr, SCSSR_FER)) { 1202 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_PER | SCSSR_FER); 1203 #if defined(DDB) || defined(KGDB) 1204 #ifdef SH4 1205 if ((SHREG_SCSPTR & SCPTR_SPB0DT) != 0) { 1206 #else 1207 if ((SHREG_SCSPDR & SCPDR_SCP0DT) != 0) { 1208 #endif 1209 #ifdef DDB 1210 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 1211 console_debugger(); 1212 } 1213 #endif 1214 #ifdef KGDB 1215 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) { 1216 kgdb_connect(1); 1217 } 1218 #endif 1219 } 1220 #endif /* DDB || KGDB */ 1221 } 1222 if ((SHREG_SCSSR & SCSSR_RDRF) != 0) { 1223 if (cc > 0) { 1224 put[0] = SHREG_SCRDR; 1225 put[1] = SHREG_SCSSR & 0x00ff; 1226 1227 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1228 SCSSR_RDRF); 1229 1230 put += 2; 1231 if (put >= end) 1232 put = sc->sc_rbuf; 1233 cc--; 1234 } 1235 1236 /* 1237 * Current string of incoming characters ended because 1238 * no more data was available or we ran out of space. 1239 * Schedule a receive event if any data was received. 1240 * If we're out of space, turn off receive interrupts. 1241 */ 1242 sc->sc_rbput = put; 1243 sc->sc_rbavail = cc; 1244 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1245 sc->sc_rx_ready = 1; 1246 1247 /* 1248 * See if we are in danger of overflowing a buffer. If 1249 * so, use hardware flow control to ease the pressure. 1250 */ 1251 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1252 cc < sc->sc_r_hiwat) { 1253 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1254 #if 0 1255 sci_hwiflow(sc); 1256 #endif 1257 } 1258 1259 /* 1260 * If we're out of space, disable receive interrupts 1261 * until the queue has drained a bit. 1262 */ 1263 if (!cc) { 1264 SHREG_SCSCR &= ~SCSCR_RIE; 1265 } 1266 } else { 1267 if (SHREG_SCSSR & SCSSR_RDRF) { 1268 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1269 } 1270 } 1271 1272 #if 0 1273 msr = bus_space_read_1(iot, ioh, sci_msr); 1274 delta = msr ^ sc->sc_msr; 1275 sc->sc_msr = msr; 1276 if (ISSET(delta, sc->sc_msr_mask)) { 1277 SET(sc->sc_msr_delta, delta); 1278 1279 /* 1280 * Pulse-per-second clock signal on edge of DCD? 1281 */ 1282 if (ISSET(delta, sc->sc_ppsmask)) { 1283 struct timeval tv; 1284 if (ISSET(msr, sc->sc_ppsmask) == 1285 sc->sc_ppsassert) { 1286 /* XXX nanotime() */ 1287 microtime(&tv); 1288 TIMEVAL_TO_TIMESPEC(&tv, 1289 &sc->ppsinfo.assert_timestamp); 1290 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1291 timespecadd(&sc->ppsinfo.assert_timestamp, 1292 &sc->ppsparam.assert_offset, 1293 &sc->ppsinfo.assert_timestamp); 1294 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1295 } 1296 1297 #ifdef PPS_SYNC 1298 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1299 hardpps(&tv, tv.tv_usec); 1300 #endif 1301 sc->ppsinfo.assert_sequence++; 1302 sc->ppsinfo.current_mode = 1303 sc->ppsparam.mode; 1304 1305 } else if (ISSET(msr, sc->sc_ppsmask) == 1306 sc->sc_ppsclear) { 1307 /* XXX nanotime() */ 1308 microtime(&tv); 1309 TIMEVAL_TO_TIMESPEC(&tv, 1310 &sc->ppsinfo.clear_timestamp); 1311 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1312 timespecadd(&sc->ppsinfo.clear_timestamp, 1313 &sc->ppsparam.clear_offset, 1314 &sc->ppsinfo.clear_timestamp); 1315 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1316 } 1317 1318 #ifdef PPS_SYNC 1319 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1320 hardpps(&tv, tv.tv_usec); 1321 #endif 1322 sc->ppsinfo.clear_sequence++; 1323 sc->ppsinfo.current_mode = 1324 sc->ppsparam.mode; 1325 } 1326 } 1327 1328 /* 1329 * Stop output immediately if we lose the output 1330 * flow control signal or carrier detect. 1331 */ 1332 if (ISSET(~msr, sc->sc_msr_mask)) { 1333 sc->sc_tbc = 0; 1334 sc->sc_heldtbc = 0; 1335 #ifdef SCI_DEBUG 1336 if (sci_debug) 1337 scistatus(sc, "sciintr "); 1338 #endif 1339 } 1340 1341 sc->sc_st_check = 1; 1342 } 1343 #endif 1344 1345 /* 1346 * Done handling any receive interrupts. See if data can be 1347 * transmitted as well. Schedule tx done event if no data left 1348 * and tty was marked busy. 1349 */ 1350 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1351 /* 1352 * If we've delayed a parameter change, do it now, and restart 1353 * output. 1354 */ 1355 if (sc->sc_heldchange) { 1356 sc->sc_heldchange = 0; 1357 sc->sc_tbc = sc->sc_heldtbc; 1358 sc->sc_heldtbc = 0; 1359 } 1360 1361 /* Output the next chunk of the contiguous buffer, if any. */ 1362 if (sc->sc_tbc > 0) { 1363 sci_putc(*(sc->sc_tba)); 1364 sc->sc_tba++; 1365 sc->sc_tbc--; 1366 } else { 1367 /* Disable transmit completion interrupts if necessary. */ 1368 #if 0 1369 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1370 #endif 1371 SHREG_SCSCR &= ~SCSCR_TIE; 1372 1373 if (sc->sc_tx_busy) { 1374 sc->sc_tx_busy = 0; 1375 sc->sc_tx_done = 1; 1376 } 1377 } 1378 } 1379 1380 /* Wake up the poller. */ 1381 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1382 softintr_schedule(sc->sc_si); 1383 #else 1384 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1385 setsoftserial(); 1386 #else 1387 if (!sci_softintr_scheduled) { 1388 sci_softintr_scheduled = 1; 1389 callout_reset(&sci_soft_ch, 1, scisoft, 1); 1390 } 1391 #endif 1392 #endif 1393 1394 #if NRND > 0 && defined(RND_SCI) 1395 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1396 #endif 1397 1398 return (1); 1399 } 1400 1401 void 1402 scicnprobe(cp) 1403 struct consdev *cp; 1404 { 1405 int maj; 1406 1407 /* locate the major number */ 1408 for (maj = 0; maj < nchrdev; maj++) 1409 if (cdevsw[maj].d_open == sciopen) 1410 break; 1411 1412 /* Initialize required fields. */ 1413 cp->cn_dev = makedev(maj, 0); 1414 #ifdef SCICONSOLE 1415 cp->cn_pri = CN_REMOTE; 1416 #else 1417 cp->cn_pri = CN_NORMAL; 1418 #endif 1419 } 1420 1421 void 1422 scicninit(struct consdev *cp) 1423 { 1424 1425 InitializeSci(scicn_speed); 1426 sciisconsole = 1; 1427 } 1428 1429 int 1430 scicngetc(dev_t dev) 1431 { 1432 int c; 1433 int s; 1434 1435 s = splserial(); 1436 c = sci_getc(); 1437 splx(s); 1438 1439 return (c); 1440 } 1441 1442 void 1443 scicnputc(dev_t dev, int c) 1444 { 1445 int s; 1446 1447 s = splserial(); 1448 sci_putc((u_char)c); 1449 splx(s); 1450 } 1451
Indexes created Wed Sep 24 15:09:51 GMT 2025