sci.c revision 1.49.18.1
1 /* $NetBSD: sci.c,v 1.49.18.1 2008/05/16 02:23:06 yamt 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 * 45 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 46 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 47 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 48 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 49 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 50 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 51 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 52 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 53 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 54 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 55 * POSSIBILITY OF SUCH DAMAGE. 56 */ 57 58 /* 59 * Copyright (c) 1991 The Regents of the University of California. 60 * All rights reserved. 61 * 62 * Redistribution and use in source and binary forms, with or without 63 * modification, are permitted provided that the following conditions 64 * are met: 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 2. Redistributions in binary form must reproduce the above copyright 68 * notice, this list of conditions and the following disclaimer in the 69 * documentation and/or other materials provided with the distribution. 70 * 3. Neither the name of the University nor the names of its contributors 71 * may be used to endorse or promote products derived from this software 72 * without specific prior written permission. 73 * 74 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 75 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 76 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 77 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 78 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 79 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 80 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 81 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 82 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 83 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 84 * SUCH DAMAGE. 85 * 86 * @(#)com.c 7.5 (Berkeley) 5/16/91 87 */ 88 89 /* 90 * SH internal serial driver 91 * 92 * This code is derived from both z8530tty.c and com.c 93 */ 94 95 #include <sys/cdefs.h> 96 __KERNEL_RCSID(0, "$NetBSD: sci.c,v 1.49.18.1 2008/05/16 02:23:06 yamt Exp $"); 97 98 #include "opt_kgdb.h" 99 #include "opt_sci.h" 100 101 #include <sys/param.h> 102 #include <sys/systm.h> 103 #include <sys/tty.h> 104 #include <sys/proc.h> 105 #include <sys/conf.h> 106 #include <sys/file.h> 107 #include <sys/syslog.h> 108 #include <sys/kernel.h> 109 #include <sys/device.h> 110 #include <sys/malloc.h> 111 #include <sys/kauth.h> 112 #include <sys/intr.h> 113 114 #include <dev/cons.h> 115 116 #include <sh3/clock.h> 117 #include <sh3/scireg.h> 118 #include <sh3/pfcreg.h> 119 #include <sh3/tmureg.h> 120 #include <sh3/exception.h> 121 122 static void scistart(struct tty *); 123 static int sciparam(struct tty *, struct termios *); 124 125 void scicnprobe(struct consdev *); 126 void scicninit(struct consdev *); 127 void scicnputc(dev_t, int); 128 int scicngetc(dev_t); 129 void scicnpoolc(dev_t, int); 130 int sciintr(void *); 131 132 struct sci_softc { 133 struct device sc_dev; /* boilerplate */ 134 struct tty *sc_tty; 135 void *sc_si; 136 callout_t sc_diag_ch; 137 138 #if 0 139 bus_space_tag_t sc_iot; /* ISA i/o space identifier */ 140 bus_space_handle_t sc_ioh; /* ISA io handle */ 141 142 int sc_drq; 143 144 int sc_frequency; 145 #endif 146 147 u_int sc_overflows, 148 sc_floods, 149 sc_errors; /* number of retries so far */ 150 u_char sc_status[7]; /* copy of registers */ 151 152 int sc_hwflags; 153 int sc_swflags; 154 u_int sc_fifolen; /* XXX always 0? */ 155 156 u_int sc_r_hiwat, 157 sc_r_lowat; 158 u_char *volatile sc_rbget, 159 *volatile sc_rbput; 160 volatile u_int sc_rbavail; 161 u_char *sc_rbuf, 162 *sc_ebuf; 163 164 u_char *sc_tba; /* transmit buffer address */ 165 u_int sc_tbc, /* transmit byte count */ 166 sc_heldtbc; 167 168 volatile u_char sc_rx_flags, /* receiver blocked */ 169 #define RX_TTY_BLOCKED 0x01 170 #define RX_TTY_OVERFLOWED 0x02 171 #define RX_IBUF_BLOCKED 0x04 172 #define RX_IBUF_OVERFLOWED 0x08 173 #define RX_ANY_BLOCK 0x0f 174 sc_tx_busy, /* working on an output chunk */ 175 sc_tx_done, /* done with one output chunk */ 176 sc_tx_stopped, /* H/W level stop (lost CTS) */ 177 sc_st_check, /* got a status interrupt */ 178 sc_rx_ready; 179 180 volatile u_char sc_heldchange; 181 }; 182 183 /* controller driver configuration */ 184 static int sci_match(struct device *, struct cfdata *, void *); 185 static void sci_attach(struct device *, struct device *, void *); 186 187 void sci_break(struct sci_softc *, int); 188 void sci_iflush(struct sci_softc *); 189 190 #define integrate static inline 191 void scisoft(void *); 192 193 integrate void sci_rxsoft(struct sci_softc *, struct tty *); 194 integrate void sci_txsoft(struct sci_softc *, struct tty *); 195 integrate void sci_stsoft(struct sci_softc *, struct tty *); 196 integrate void sci_schedrx(struct sci_softc *); 197 void scidiag(void *); 198 199 #define SCIUNIT_MASK 0x7ffff 200 #define SCIDIALOUT_MASK 0x80000 201 202 #define SCIUNIT(x) (minor(x) & SCIUNIT_MASK) 203 #define SCIDIALOUT(x) (minor(x) & SCIDIALOUT_MASK) 204 205 /* Hardware flag masks */ 206 #define SCI_HW_NOIEN 0x01 207 #define SCI_HW_FIFO 0x02 208 #define SCI_HW_FLOW 0x08 209 #define SCI_HW_DEV_OK 0x20 210 #define SCI_HW_CONSOLE 0x40 211 #define SCI_HW_KGDB 0x80 212 213 /* Buffer size for character buffer */ 214 #define SCI_RING_SIZE 2048 215 216 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 217 u_int sci_rbuf_hiwat = (SCI_RING_SIZE * 1) / 4; 218 u_int sci_rbuf_lowat = (SCI_RING_SIZE * 3) / 4; 219 220 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 221 int sciconscflag = CONMODE; 222 int sciisconsole = 0; 223 224 #ifdef SCICN_SPEED 225 int scicn_speed = SCICN_SPEED; 226 #else 227 int scicn_speed = 9600; 228 #endif 229 230 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 231 232 u_int sci_rbuf_size = SCI_RING_SIZE; 233 234 CFATTACH_DECL(sci, sizeof(struct sci_softc), 235 sci_match, sci_attach, NULL, NULL); 236 237 extern struct cfdriver sci_cd; 238 239 static int sci_attached; 240 241 dev_type_open(sciopen); 242 dev_type_close(sciclose); 243 dev_type_read(sciread); 244 dev_type_write(sciwrite); 245 dev_type_ioctl(sciioctl); 246 dev_type_stop(scistop); 247 dev_type_tty(scitty); 248 dev_type_poll(scipoll); 249 250 const struct cdevsw sci_cdevsw = { 251 sciopen, sciclose, sciread, sciwrite, sciioctl, 252 scistop, scitty, scipoll, nommap, ttykqfilter, D_TTY 253 }; 254 255 void InitializeSci (unsigned int); 256 257 /* 258 * following functions are debugging prupose only 259 */ 260 #define CR 0x0D 261 #define I2C_ADRS (*(volatile unsigned int *)0xa8000000) 262 #define USART_ON (unsigned int)~0x08 263 264 void sci_putc(unsigned char); 265 unsigned char sci_getc(void); 266 int SciErrCheck(void); 267 268 /* 269 * InitializeSci 270 * : unsigned int bps; 271 * : SCI(Serial Communication Interface) 272 */ 273 274 void 275 InitializeSci(unsigned int bps) 276 { 277 278 /* Initialize SCR */ 279 SHREG_SCSCR = 0x00; 280 281 /* Serial Mode Register */ 282 SHREG_SCSMR = 0x00; /* Async,8bit,NonParity,Even,1Stop,NoMulti */ 283 284 /* Bit Rate Register */ 285 SHREG_SCBRR = divrnd(sh_clock_get_pclock(), 32 * bps) - 1; 286 287 /* 288 * wait 1mSec, because Send/Recv must begin 1 bit period after 289 * BRR is set. 290 */ 291 delay(1000); 292 293 /* Send permission, Receive permission ON */ 294 SHREG_SCSCR = SCSCR_TE | SCSCR_RE; 295 296 /* Serial Status Register */ 297 SHREG_SCSSR &= SCSSR_TDRE; /* Clear Status */ 298 299 #if 0 300 I2C_ADRS &= ~0x08; /* enable RS-232C */ 301 #endif 302 } 303 304 305 /* 306 * sci_putc 307 * : unsigned char c; 308 */ 309 void 310 sci_putc(unsigned char c) 311 { 312 313 /* wait for ready */ 314 while ((SHREG_SCSSR & SCSSR_TDRE) == 0) 315 ; 316 317 /* write send data to send register */ 318 SHREG_SCTDR = c; 319 320 /* clear ready flag */ 321 SHREG_SCSSR &= ~SCSSR_TDRE; 322 } 323 324 /* 325 * : SciErrCheck 326 * 0x20 = over run 327 * 0x10 = frame error 328 * 0x80 = parity error 329 */ 330 int 331 SciErrCheck(void) 332 { 333 334 return(SHREG_SCSSR & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)); 335 } 336 337 /* 338 * sci_getc 339 */ 340 unsigned char 341 sci_getc(void) 342 { 343 unsigned char c, err_c; 344 345 while (((err_c = SHREG_SCSSR) 346 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) == 0) 347 ; 348 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 349 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 350 return(err_c |= 0x80); 351 } 352 353 c = SHREG_SCRDR; 354 355 SHREG_SCSSR &= ~SCSSR_RDRF; 356 357 return(c); 358 } 359 360 static int 361 sci_match(struct device *parent, struct cfdata *cfp, void *aux) 362 { 363 364 if (strcmp(cfp->cf_name, "sci") || sci_attached) 365 return 0; 366 367 return 1; 368 } 369 370 static void 371 sci_attach(struct device *parent, struct device *self, void *aux) 372 { 373 struct sci_softc *sc = (struct sci_softc *)self; 374 struct tty *tp; 375 376 sci_attached = 1; 377 378 sc->sc_hwflags = 0; /* XXX */ 379 sc->sc_swflags = 0; /* XXX */ 380 sc->sc_fifolen = 0; /* XXX */ 381 382 if (sciisconsole) { 383 SET(sc->sc_hwflags, SCI_HW_CONSOLE); 384 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 385 printf("\n%s: console\n", sc->sc_dev.dv_xname); 386 } else { 387 InitializeSci(9600); 388 printf("\n"); 389 } 390 391 callout_init(&sc->sc_diag_ch, 0); 392 393 intc_intr_establish(SH_INTEVT_SCI_ERI, IST_LEVEL, IPL_SERIAL, sciintr, 394 sc); 395 intc_intr_establish(SH_INTEVT_SCI_RXI, IST_LEVEL, IPL_SERIAL, sciintr, 396 sc); 397 intc_intr_establish(SH_INTEVT_SCI_TXI, IST_LEVEL, IPL_SERIAL, sciintr, 398 sc); 399 intc_intr_establish(SH_INTEVT_SCI_TEI, IST_LEVEL, IPL_SERIAL, sciintr, 400 sc); 401 402 sc->sc_si = softint_establish(SOFTINT_SERIAL, scisoft, sc); 403 SET(sc->sc_hwflags, SCI_HW_DEV_OK); 404 405 tp = ttymalloc(); 406 tp->t_oproc = scistart; 407 tp->t_param = sciparam; 408 tp->t_hwiflow = NULL; 409 410 sc->sc_tty = tp; 411 sc->sc_rbuf = malloc(sci_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 412 if (sc->sc_rbuf == NULL) { 413 printf("%s: unable to allocate ring buffer\n", 414 sc->sc_dev.dv_xname); 415 return; 416 } 417 sc->sc_ebuf = sc->sc_rbuf + (sci_rbuf_size << 1); 418 419 tty_attach(tp); 420 } 421 422 /* 423 * Start or restart transmission. 424 */ 425 static void 426 scistart(struct tty *tp) 427 { 428 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 429 int s; 430 431 s = spltty(); 432 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 433 goto out; 434 if (sc->sc_tx_stopped) 435 goto out; 436 if (!ttypull(tp)) 437 goto out; 438 439 /* Grab the first contiguous region of buffer space. */ 440 { 441 u_char *tba; 442 int tbc; 443 444 tba = tp->t_outq.c_cf; 445 tbc = ndqb(&tp->t_outq, 0); 446 447 (void)splserial(); 448 449 sc->sc_tba = tba; 450 sc->sc_tbc = tbc; 451 } 452 453 SET(tp->t_state, TS_BUSY); 454 sc->sc_tx_busy = 1; 455 456 /* Enable transmit completion interrupts if necessary. */ 457 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 458 459 /* Output the first byte of the contiguous buffer. */ 460 { 461 if (sc->sc_tbc > 0) { 462 sci_putc(*(sc->sc_tba)); 463 sc->sc_tba++; 464 sc->sc_tbc--; 465 } 466 } 467 out: 468 splx(s); 469 return; 470 } 471 472 /* 473 * Set SCI tty parameters from termios. 474 * XXX - Should just copy the whole termios after 475 * making sure all the changes could be done. 476 */ 477 static int 478 sciparam(struct tty *tp, struct termios *t) 479 { 480 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 481 int ospeed = t->c_ospeed; 482 int s; 483 484 if (!device_is_active(&sc->sc_dev)) 485 return (EIO); 486 487 /* Check requested parameters. */ 488 if (ospeed < 0) 489 return (EINVAL); 490 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 491 return (EINVAL); 492 493 /* 494 * For the console, always force CLOCAL and !HUPCL, so that the port 495 * is always active. 496 */ 497 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 498 ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 499 SET(t->c_cflag, CLOCAL); 500 CLR(t->c_cflag, HUPCL); 501 } 502 503 /* 504 * If there were no changes, don't do anything. This avoids dropping 505 * input and improves performance when all we did was frob things like 506 * VMIN and VTIME. 507 */ 508 if (tp->t_ospeed == t->c_ospeed && 509 tp->t_cflag == t->c_cflag) 510 return (0); 511 512 #if 0 513 /* XXX (msaitoh) */ 514 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 515 #endif 516 517 s = splserial(); 518 519 /* 520 * Set the FIFO threshold based on the receive speed. 521 * 522 * * If it's a low speed, it's probably a mouse or some other 523 * interactive device, so set the threshold low. 524 * * If it's a high speed, trim the trigger level down to prevent 525 * overflows. 526 * * Otherwise set it a bit higher. 527 */ 528 #if 0 529 /* XXX (msaitoh) */ 530 if (ISSET(sc->sc_hwflags, SCI_HW_HAYESP)) 531 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 532 else if (ISSET(sc->sc_hwflags, SCI_HW_FIFO)) 533 sc->sc_fifo = FIFO_ENABLE | 534 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 535 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 536 else 537 sc->sc_fifo = 0; 538 #endif 539 540 /* And copy to tty. */ 541 tp->t_ispeed = 0; 542 tp->t_ospeed = t->c_ospeed; 543 tp->t_cflag = t->c_cflag; 544 545 if (!sc->sc_heldchange) { 546 if (sc->sc_tx_busy) { 547 sc->sc_heldtbc = sc->sc_tbc; 548 sc->sc_tbc = 0; 549 sc->sc_heldchange = 1; 550 } 551 #if 0 552 /* XXX (msaitoh) */ 553 else 554 sci_loadchannelregs(sc); 555 #endif 556 } 557 558 if (!ISSET(t->c_cflag, CHWFLOW)) { 559 /* Disable the high water mark. */ 560 sc->sc_r_hiwat = 0; 561 sc->sc_r_lowat = 0; 562 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 563 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 564 sci_schedrx(sc); 565 } 566 } else { 567 sc->sc_r_hiwat = sci_rbuf_hiwat; 568 sc->sc_r_lowat = sci_rbuf_lowat; 569 } 570 571 splx(s); 572 573 #ifdef SCI_DEBUG 574 if (sci_debug) 575 scistatus(sc, "sciparam "); 576 #endif 577 578 if (!ISSET(t->c_cflag, CHWFLOW)) { 579 if (sc->sc_tx_stopped) { 580 sc->sc_tx_stopped = 0; 581 scistart(tp); 582 } 583 } 584 585 return (0); 586 } 587 588 void 589 sci_iflush(struct sci_softc *sc) 590 { 591 unsigned char err_c; 592 volatile unsigned char c; 593 594 if (((err_c = SHREG_SCSSR) 595 & (SCSSR_RDRF | SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 596 597 if ((err_c & (SCSSR_ORER | SCSSR_FER | SCSSR_PER)) != 0) { 598 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER); 599 return; 600 } 601 602 c = SHREG_SCRDR; 603 604 SHREG_SCSSR &= ~SCSSR_RDRF; 605 } 606 } 607 608 int 609 sciopen(dev_t dev, int flag, int mode, struct lwp *l) 610 { 611 int unit = SCIUNIT(dev); 612 struct sci_softc *sc; 613 struct tty *tp; 614 int s, s2; 615 int error; 616 617 if (unit >= sci_cd.cd_ndevs) 618 return (ENXIO); 619 sc = sci_cd.cd_devs[unit]; 620 if (sc == 0 || !ISSET(sc->sc_hwflags, SCI_HW_DEV_OK) || 621 sc->sc_rbuf == NULL) 622 return (ENXIO); 623 624 if (!device_is_active(&sc->sc_dev)) 625 return (ENXIO); 626 627 #ifdef KGDB 628 /* 629 * If this is the kgdb port, no other use is permitted. 630 */ 631 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) 632 return (EBUSY); 633 #endif 634 635 tp = sc->sc_tty; 636 637 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 638 return (EBUSY); 639 640 s = spltty(); 641 642 /* 643 * Do the following iff this is a first open. 644 */ 645 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 646 struct termios t; 647 648 tp->t_dev = dev; 649 650 s2 = splserial(); 651 652 /* Turn on interrupts. */ 653 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 654 655 splx(s2); 656 657 /* 658 * Initialize the termios status to the defaults. Add in the 659 * sticky bits from TIOCSFLAGS. 660 */ 661 t.c_ispeed = 0; 662 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 663 t.c_ospeed = scicn_speed; 664 t.c_cflag = sciconscflag; 665 } else { 666 t.c_ospeed = TTYDEF_SPEED; 667 t.c_cflag = TTYDEF_CFLAG; 668 } 669 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 670 SET(t.c_cflag, CLOCAL); 671 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 672 SET(t.c_cflag, CRTSCTS); 673 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 674 SET(t.c_cflag, MDMBUF); 675 /* Make sure sciparam() will do something. */ 676 tp->t_ospeed = 0; 677 (void) sciparam(tp, &t); 678 tp->t_iflag = TTYDEF_IFLAG; 679 tp->t_oflag = TTYDEF_OFLAG; 680 tp->t_lflag = TTYDEF_LFLAG; 681 ttychars(tp); 682 ttsetwater(tp); 683 684 s2 = splserial(); 685 686 /* Clear the input ring, and unblock. */ 687 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 688 sc->sc_rbavail = sci_rbuf_size; 689 sci_iflush(sc); 690 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 691 #if 0 692 /* XXX (msaitoh) */ 693 sci_hwiflow(sc); 694 #endif 695 696 #ifdef SCI_DEBUG 697 if (sci_debug) 698 scistatus(sc, "sciopen "); 699 #endif 700 701 splx(s2); 702 } 703 704 splx(s); 705 706 error = ttyopen(tp, SCIDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 707 if (error) 708 goto bad; 709 710 error = (*tp->t_linesw->l_open)(dev, tp); 711 if (error) 712 goto bad; 713 714 return (0); 715 716 bad: 717 718 return (error); 719 } 720 721 int 722 sciclose(dev_t dev, int flag, int mode, struct lwp *l) 723 { 724 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 725 struct tty *tp = sc->sc_tty; 726 727 /* XXX This is for cons.c. */ 728 if (!ISSET(tp->t_state, TS_ISOPEN)) 729 return (0); 730 731 (*tp->t_linesw->l_close)(tp, flag); 732 ttyclose(tp); 733 734 if (!device_is_active(&sc->sc_dev)) 735 return (0); 736 737 return (0); 738 } 739 740 int 741 sciread(dev_t dev, struct uio *uio, int flag) 742 { 743 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 744 struct tty *tp = sc->sc_tty; 745 746 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 747 } 748 749 int 750 sciwrite(dev_t dev, struct uio *uio, int flag) 751 { 752 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 753 struct tty *tp = sc->sc_tty; 754 755 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 756 } 757 758 int 759 scipoll(dev_t dev, int events, struct lwp *l) 760 { 761 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 762 struct tty *tp = sc->sc_tty; 763 764 return ((*tp->t_linesw->l_poll)(tp, events, l)); 765 } 766 767 struct tty * 768 scitty(dev_t dev) 769 { 770 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 771 struct tty *tp = sc->sc_tty; 772 773 return (tp); 774 } 775 776 int 777 sciioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 778 { 779 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(dev)]; 780 struct tty *tp = sc->sc_tty; 781 int error; 782 int s; 783 784 if (!device_is_active(&sc->sc_dev)) 785 return (EIO); 786 787 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 788 if (error != EPASSTHROUGH) 789 return (error); 790 791 error = ttioctl(tp, cmd, data, flag, l); 792 if (error != EPASSTHROUGH) 793 return (error); 794 795 error = 0; 796 797 s = splserial(); 798 799 switch (cmd) { 800 case TIOCSBRK: 801 sci_break(sc, 1); 802 break; 803 804 case TIOCCBRK: 805 sci_break(sc, 0); 806 break; 807 808 case TIOCGFLAGS: 809 *(int *)data = sc->sc_swflags; 810 break; 811 812 case TIOCSFLAGS: 813 error = kauth_authorize_device_tty(l->l_cred, 814 KAUTH_DEVICE_TTY_PRIVSET, tp); 815 if (error) 816 break; 817 sc->sc_swflags = *(int *)data; 818 break; 819 820 default: 821 error = EPASSTHROUGH; 822 break; 823 } 824 825 splx(s); 826 827 return (error); 828 } 829 830 integrate void 831 sci_schedrx(struct sci_softc *sc) 832 { 833 834 sc->sc_rx_ready = 1; 835 836 /* Wake up the poller. */ 837 softint_schedule(sc->sc_si); 838 } 839 840 void 841 sci_break(struct sci_softc *sc, int onoff) 842 { 843 844 if (onoff) 845 SHREG_SCSSR &= ~SCSSR_TDRE; 846 else 847 SHREG_SCSSR |= SCSSR_TDRE; 848 849 #if 0 /* XXX */ 850 if (!sc->sc_heldchange) { 851 if (sc->sc_tx_busy) { 852 sc->sc_heldtbc = sc->sc_tbc; 853 sc->sc_tbc = 0; 854 sc->sc_heldchange = 1; 855 } else 856 sci_loadchannelregs(sc); 857 } 858 #endif 859 } 860 861 /* 862 * Stop output, e.g., for ^S or output flush. 863 */ 864 void 865 scistop(struct tty *tp, int flag) 866 { 867 struct sci_softc *sc = sci_cd.cd_devs[SCIUNIT(tp->t_dev)]; 868 int s; 869 870 s = splserial(); 871 if (ISSET(tp->t_state, TS_BUSY)) { 872 /* Stop transmitting at the next chunk. */ 873 sc->sc_tbc = 0; 874 sc->sc_heldtbc = 0; 875 if (!ISSET(tp->t_state, TS_TTSTOP)) 876 SET(tp->t_state, TS_FLUSH); 877 } 878 splx(s); 879 } 880 881 void 882 scidiag(void *arg) 883 { 884 struct sci_softc *sc = arg; 885 int overflows, floods; 886 int s; 887 888 s = splserial(); 889 overflows = sc->sc_overflows; 890 sc->sc_overflows = 0; 891 floods = sc->sc_floods; 892 sc->sc_floods = 0; 893 sc->sc_errors = 0; 894 splx(s); 895 896 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 897 sc->sc_dev.dv_xname, 898 overflows, overflows == 1 ? "" : "s", 899 floods, floods == 1 ? "" : "s"); 900 } 901 902 integrate void 903 sci_rxsoft(struct sci_softc *sc, struct tty *tp) 904 { 905 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 906 u_char *get, *end; 907 u_int cc, scc; 908 u_char ssr; 909 int code; 910 int s; 911 912 end = sc->sc_ebuf; 913 get = sc->sc_rbget; 914 scc = cc = sci_rbuf_size - sc->sc_rbavail; 915 916 if (cc == sci_rbuf_size) { 917 sc->sc_floods++; 918 if (sc->sc_errors++ == 0) 919 callout_reset(&sc->sc_diag_ch, 60 * hz, scidiag, sc); 920 } 921 922 while (cc) { 923 code = get[0]; 924 ssr = get[1]; 925 if (ISSET(ssr, SCSSR_FER | SCSSR_PER)) { 926 if (ISSET(ssr, SCSSR_FER)) 927 SET(code, TTY_FE); 928 if (ISSET(ssr, SCSSR_PER)) 929 SET(code, TTY_PE); 930 } 931 if ((*rint)(code, tp) == -1) { 932 /* 933 * The line discipline's buffer is out of space. 934 */ 935 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 936 /* 937 * We're either not using flow control, or the 938 * line discipline didn't tell us to block for 939 * some reason. Either way, we have no way to 940 * know when there's more space available, so 941 * just drop the rest of the data. 942 */ 943 get += cc << 1; 944 if (get >= end) 945 get -= sci_rbuf_size << 1; 946 cc = 0; 947 } else { 948 /* 949 * Don't schedule any more receive processing 950 * until the line discipline tells us there's 951 * space available (through scihwiflow()). 952 * Leave the rest of the data in the input 953 * buffer. 954 */ 955 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 956 } 957 break; 958 } 959 get += 2; 960 if (get >= end) 961 get = sc->sc_rbuf; 962 cc--; 963 } 964 965 if (cc != scc) { 966 sc->sc_rbget = get; 967 s = splserial(); 968 cc = sc->sc_rbavail += scc - cc; 969 /* Buffers should be ok again, release possible block. */ 970 if (cc >= sc->sc_r_lowat) { 971 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 972 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 973 SHREG_SCSCR |= SCSCR_RIE; 974 } 975 #if 0 976 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 977 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 978 sci_hwiflow(sc); 979 } 980 #endif 981 } 982 splx(s); 983 } 984 } 985 986 integrate void 987 sci_txsoft(sc, tp) 988 struct sci_softc *sc; 989 struct tty *tp; 990 { 991 992 CLR(tp->t_state, TS_BUSY); 993 if (ISSET(tp->t_state, TS_FLUSH)) 994 CLR(tp->t_state, TS_FLUSH); 995 else 996 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 997 (*tp->t_linesw->l_start)(tp); 998 } 999 1000 integrate void 1001 sci_stsoft(struct sci_softc *sc, struct tty *tp) 1002 { 1003 #if 0 1004 /* XXX (msaitoh) */ 1005 u_char msr, delta; 1006 int s; 1007 1008 s = splserial(); 1009 msr = sc->sc_msr; 1010 delta = sc->sc_msr_delta; 1011 sc->sc_msr_delta = 0; 1012 splx(s); 1013 1014 if (ISSET(delta, sc->sc_msr_dcd)) { 1015 /* 1016 * Inform the tty layer that carrier detect changed. 1017 */ 1018 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1019 } 1020 1021 if (ISSET(delta, sc->sc_msr_cts)) { 1022 /* Block or unblock output according to flow control. */ 1023 if (ISSET(msr, sc->sc_msr_cts)) { 1024 sc->sc_tx_stopped = 0; 1025 (*tp->t_linesw->l_start)(tp); 1026 } else { 1027 sc->sc_tx_stopped = 1; 1028 } 1029 } 1030 1031 #ifdef SCI_DEBUG 1032 if (sci_debug) 1033 scistatus(sc, "sci_stsoft"); 1034 #endif 1035 #endif 1036 } 1037 1038 void 1039 scisoft(void *arg) 1040 { 1041 struct sci_softc *sc = arg; 1042 struct tty *tp; 1043 1044 if (!device_is_active(&sc->sc_dev)) 1045 return; 1046 1047 tp = sc->sc_tty; 1048 1049 if (sc->sc_rx_ready) { 1050 sc->sc_rx_ready = 0; 1051 sci_rxsoft(sc, tp); 1052 } 1053 1054 #if 0 1055 if (sc->sc_st_check) { 1056 sc->sc_st_check = 0; 1057 sci_stsoft(sc, tp); 1058 } 1059 #endif 1060 1061 if (sc->sc_tx_done) { 1062 sc->sc_tx_done = 0; 1063 sci_txsoft(sc, tp); 1064 } 1065 } 1066 1067 int 1068 sciintr(void *arg) 1069 { 1070 struct sci_softc *sc = arg; 1071 u_char *put, *end; 1072 u_int cc; 1073 u_short ssr; 1074 1075 if (!device_is_active(&sc->sc_dev)) 1076 return (0); 1077 1078 end = sc->sc_ebuf; 1079 put = sc->sc_rbput; 1080 cc = sc->sc_rbavail; 1081 1082 do { 1083 ssr = SHREG_SCSSR; 1084 if (ISSET(ssr, SCSSR_FER)) { 1085 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_PER | SCSSR_FER); 1086 #if defined(DDB) || defined(KGDB) 1087 #ifdef SH4 1088 if ((SHREG_SCSPTR & SCSPTR_SPB0DT) != 0) { 1089 #else 1090 if ((SHREG_SCSPDR & SCSPDR_SCP0DT) != 0) { 1091 #endif 1092 #ifdef DDB 1093 if (ISSET(sc->sc_hwflags, SCI_HW_CONSOLE)) { 1094 console_debugger(); 1095 } 1096 #endif 1097 #ifdef KGDB 1098 if (ISSET(sc->sc_hwflags, SCI_HW_KGDB)) { 1099 kgdb_connect(1); 1100 } 1101 #endif 1102 } 1103 #endif /* DDB || KGDB */ 1104 } 1105 if ((SHREG_SCSSR & SCSSR_RDRF) != 0) { 1106 if (cc > 0) { 1107 put[0] = SHREG_SCRDR; 1108 put[1] = SHREG_SCSSR & 0x00ff; 1109 1110 put += 2; 1111 if (put >= end) 1112 put = sc->sc_rbuf; 1113 cc--; 1114 } 1115 1116 SHREG_SCSSR &= ~(SCSSR_ORER | SCSSR_FER | SCSSR_PER | 1117 SCSSR_RDRF); 1118 1119 /* 1120 * Current string of incoming characters ended because 1121 * no more data was available or we ran out of space. 1122 * Schedule a receive event if any data was received. 1123 * If we're out of space, turn off receive interrupts. 1124 */ 1125 sc->sc_rbput = put; 1126 sc->sc_rbavail = cc; 1127 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1128 sc->sc_rx_ready = 1; 1129 1130 /* 1131 * See if we are in danger of overflowing a buffer. If 1132 * so, use hardware flow control to ease the pressure. 1133 */ 1134 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1135 cc < sc->sc_r_hiwat) { 1136 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1137 #if 0 1138 sci_hwiflow(sc); 1139 #endif 1140 } 1141 1142 /* 1143 * If we're out of space, disable receive interrupts 1144 * until the queue has drained a bit. 1145 */ 1146 if (!cc) { 1147 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1148 SHREG_SCSCR &= ~SCSCR_RIE; 1149 } 1150 } else { 1151 if (SHREG_SCSSR & SCSSR_RDRF) { 1152 SHREG_SCSCR &= ~(SCSCR_TIE | SCSCR_RIE); 1153 delay(10); 1154 SHREG_SCSCR |= SCSCR_TIE | SCSCR_RIE; 1155 continue; 1156 } 1157 } 1158 } while (SHREG_SCSSR & SCSSR_RDRF); 1159 1160 #if 0 1161 msr = bus_space_read_1(iot, ioh, sci_msr); 1162 delta = msr ^ sc->sc_msr; 1163 sc->sc_msr = msr; 1164 if (ISSET(delta, sc->sc_msr_mask)) { 1165 SET(sc->sc_msr_delta, delta); 1166 1167 /* 1168 * Pulse-per-second clock signal on edge of DCD? 1169 */ 1170 if (ISSET(delta, sc->sc_ppsmask)) { 1171 struct timeval tv; 1172 if (ISSET(msr, sc->sc_ppsmask) == 1173 sc->sc_ppsassert) { 1174 /* XXX nanotime() */ 1175 microtime(&tv); 1176 TIMEVAL_TO_TIMESPEC(&tv, 1177 &sc->ppsinfo.assert_timestamp); 1178 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1179 timespecadd(&sc->ppsinfo.assert_timestamp, 1180 &sc->ppsparam.assert_offset, 1181 &sc->ppsinfo.assert_timestamp); 1182 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1183 } 1184 1185 #ifdef PPS_SYNC 1186 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1187 hardpps(&tv, tv.tv_usec); 1188 #endif 1189 sc->ppsinfo.assert_sequence++; 1190 sc->ppsinfo.current_mode = 1191 sc->ppsparam.mode; 1192 1193 } else if (ISSET(msr, sc->sc_ppsmask) == 1194 sc->sc_ppsclear) { 1195 /* XXX nanotime() */ 1196 microtime(&tv); 1197 TIMEVAL_TO_TIMESPEC(&tv, 1198 &sc->ppsinfo.clear_timestamp); 1199 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1200 timespecadd(&sc->ppsinfo.clear_timestamp, 1201 &sc->ppsparam.clear_offset, 1202 &sc->ppsinfo.clear_timestamp); 1203 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1204 } 1205 1206 #ifdef PPS_SYNC 1207 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1208 hardpps(&tv, tv.tv_usec); 1209 #endif 1210 sc->ppsinfo.clear_sequence++; 1211 sc->ppsinfo.current_mode = 1212 sc->ppsparam.mode; 1213 } 1214 } 1215 1216 /* 1217 * Stop output immediately if we lose the output 1218 * flow control signal or carrier detect. 1219 */ 1220 if (ISSET(~msr, sc->sc_msr_mask)) { 1221 sc->sc_tbc = 0; 1222 sc->sc_heldtbc = 0; 1223 #ifdef SCI_DEBUG 1224 if (sci_debug) 1225 scistatus(sc, "sciintr "); 1226 #endif 1227 } 1228 1229 sc->sc_st_check = 1; 1230 } 1231 #endif 1232 1233 /* 1234 * Done handling any receive interrupts. See if data can be 1235 * transmitted as well. Schedule tx done event if no data left 1236 * and tty was marked busy. 1237 */ 1238 if ((SHREG_SCSSR & SCSSR_TDRE) != 0) { 1239 /* 1240 * If we've delayed a parameter change, do it now, and restart 1241 * output. 1242 */ 1243 if (sc->sc_heldchange) { 1244 sc->sc_heldchange = 0; 1245 sc->sc_tbc = sc->sc_heldtbc; 1246 sc->sc_heldtbc = 0; 1247 } 1248 1249 /* Output the next chunk of the contiguous buffer, if any. */ 1250 if (sc->sc_tbc > 0) { 1251 sci_putc(*(sc->sc_tba)); 1252 sc->sc_tba++; 1253 sc->sc_tbc--; 1254 } else { 1255 /* Disable transmit completion interrupts if necessary. */ 1256 #if 0 1257 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1258 #endif 1259 SHREG_SCSCR &= ~SCSCR_TIE; 1260 1261 if (sc->sc_tx_busy) { 1262 sc->sc_tx_busy = 0; 1263 sc->sc_tx_done = 1; 1264 } 1265 } 1266 } 1267 1268 /* Wake up the poller. */ 1269 softint_schedule(sc->sc_si); 1270 1271 #if NRND > 0 && defined(RND_SCI) 1272 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1273 #endif 1274 1275 return (1); 1276 } 1277 1278 void 1279 scicnprobe(cp) 1280 struct consdev *cp; 1281 { 1282 int maj; 1283 1284 /* locate the major number */ 1285 maj = cdevsw_lookup_major(&sci_cdevsw); 1286 1287 /* Initialize required fields. */ 1288 cp->cn_dev = makedev(maj, 0); 1289 #ifdef SCICONSOLE 1290 cp->cn_pri = CN_REMOTE; 1291 #else 1292 cp->cn_pri = CN_NORMAL; 1293 #endif 1294 } 1295 1296 void 1297 scicninit(struct consdev *cp) 1298 { 1299 1300 InitializeSci(scicn_speed); 1301 sciisconsole = 1; 1302 } 1303 1304 int 1305 scicngetc(dev_t dev) 1306 { 1307 int c; 1308 int s; 1309 1310 s = splserial(); 1311 c = sci_getc(); 1312 splx(s); 1313 1314 return (c); 1315 } 1316 1317 void 1318 scicnputc(dev_t dev, int c) 1319 { 1320 int s; 1321 1322 s = splserial(); 1323 sci_putc((u_char)c); 1324 splx(s); 1325 } 1326
Indexes created Wed Oct 01 18:09:54 GMT 2025