1 /* $NetBSD: scif.c,v 1.68 2020/11/21 17:25:52 thorpej 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: scif.c,v 1.68 2020/11/21 17:25:52 thorpej Exp $"); 97 98 #include "opt_kgdb.h" 99 #include "opt_scif.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/kmem.h> 111 #include <sys/kgdb.h> 112 #include <sys/kauth.h> 113 #include <sys/intr.h> 114 115 #include <dev/cons.h> 116 117 #include <sh3/clock.h> 118 #include <sh3/exception.h> 119 #include <sh3/scifreg.h> 120 121 #include <sh3/dev/scifvar.h> 122 123 #include "locators.h" 124 125 126 struct scif_softc { 127 device_t sc_dev; 128 129 struct tty *sc_tty; 130 void *sc_si; 131 132 callout_t sc_diag_ch; 133 134 #if 0 135 bus_space_tag_t sc_iot; /* ISA i/o space identifier */ 136 bus_space_handle_t sc_ioh; /* ISA io handle */ 137 138 int sc_drq; 139 140 int sc_frequency; 141 #endif 142 143 u_int sc_overflows, 144 sc_floods, 145 sc_errors; /* number of retries so far */ 146 u_char sc_status[7]; /* copy of registers */ 147 148 int sc_hwflags; 149 int sc_swflags; 150 u_int sc_fifolen; 151 152 u_int sc_r_hiwat, 153 sc_r_lowat; 154 u_char *volatile sc_rbget, 155 *volatile sc_rbput; 156 volatile u_int sc_rbavail; 157 u_char *sc_rbuf, 158 *sc_ebuf; 159 160 u_char *sc_tba; /* transmit buffer address */ 161 u_int sc_tbc, /* transmit byte count */ 162 sc_heldtbc; 163 164 volatile u_char sc_rx_flags, 165 #define RX_TTY_BLOCKED 0x01 166 #define RX_TTY_OVERFLOWED 0x02 167 #define RX_IBUF_BLOCKED 0x04 168 #define RX_IBUF_OVERFLOWED 0x08 169 #define RX_ANY_BLOCK 0x0f 170 sc_tx_busy, /* working on an output chunk */ 171 sc_tx_done, /* done with one output chunk */ 172 sc_tx_stopped, /* H/W level stop (lost CTS) */ 173 sc_st_check, /* got a status interrupt */ 174 sc_rx_ready; 175 176 volatile u_char sc_heldchange; 177 }; 178 179 180 static int scif_match(device_t, cfdata_t, void *); 181 static void scif_attach(device_t, device_t, void *); 182 183 CFATTACH_DECL_NEW(scif, sizeof(struct scif_softc), 184 scif_match, scif_attach, NULL, NULL); 185 186 static int scif_attached = 0; /* XXX: FIXME: don't limit to just one! */ 187 188 extern struct cfdriver scif_cd; 189 190 #define SCIFUNIT(x) TTUNIT(x) 191 #define SCIFDIALOUT(x) TTDIALOUT(x) 192 193 194 /* console */ 195 dev_type_cnprobe(scifcnprobe); 196 dev_type_cninit(scifcninit); 197 dev_type_cngetc(scifcngetc); 198 dev_type_cnputc(scifcnputc); 199 200 201 /* cdevsw */ 202 dev_type_open(scifopen); 203 dev_type_close(scifclose); 204 dev_type_read(scifread); 205 dev_type_write(scifwrite); 206 dev_type_ioctl(scifioctl); 207 dev_type_stop(scifstop); 208 dev_type_tty(sciftty); 209 dev_type_poll(scifpoll); 210 211 const struct cdevsw scif_cdevsw = { 212 .d_open = scifopen, 213 .d_close = scifclose, 214 .d_read = scifread, 215 .d_write = scifwrite, 216 .d_ioctl = scifioctl, 217 .d_stop = scifstop, 218 .d_tty = sciftty, 219 .d_poll = scifpoll, 220 .d_mmap = nommap, 221 .d_kqfilter = ttykqfilter, 222 .d_discard = nodiscard, 223 .d_flag = D_TTY 224 }; 225 226 #ifndef SCIFCONSOLE 227 #define SCIFCONSOLE 0 228 #endif 229 int scifconsole = SCIFCONSOLE; /* patchable */ 230 231 /* struct tty */ 232 static void scifstart(struct tty *); 233 static int scifparam(struct tty *, struct termios *); 234 235 236 void InitializeScif (unsigned int); 237 int ScifErrCheck(void); 238 void scif_putc(unsigned char); 239 unsigned char scif_getc(void); 240 241 static int scifintr(void *); 242 static void scifsoft(void *); 243 static void scif_rxsoft(struct scif_softc *, struct tty *); 244 static void scif_txsoft(struct scif_softc *, struct tty *); 245 #if 0 246 static void scif_stsoft(struct scif_softc *, struct tty *); 247 #endif 248 static void scif_schedrx(struct scif_softc *); 249 static void scifdiag(void *); 250 251 static void scif_break(struct scif_softc *, int); 252 static void scif_iflush(struct scif_softc *); 253 254 255 /* Hardware flag masks (sc_hwflags) */ 256 #define SCIF_HW_NOIEN 0x01 257 #define SCIF_HW_FIFO 0x02 258 #define SCIF_HW_FLOW 0x08 259 #define SCIF_HW_DEV_OK 0x20 260 #define SCIF_HW_CONSOLE 0x40 261 #define SCIF_HW_KGDB 0x80 262 263 264 /* Buffer size for character buffer */ 265 #define SCIF_RING_SIZE 2048 266 static unsigned int scif_rbuf_size = SCIF_RING_SIZE; 267 268 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 269 static unsigned int scif_rbuf_hiwat = (SCIF_RING_SIZE * 1) / 4; 270 static unsigned int scif_rbuf_lowat = (SCIF_RING_SIZE * 3) / 4; 271 272 273 #ifdef SCIFCN_SPEED 274 unsigned int scifcn_speed = SCIFCN_SPEED; 275 #else 276 unsigned int scifcn_speed = 9600; 277 #endif 278 279 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 280 int scifconscflag = CONMODE; 281 282 static int scifisconsole = 0; 283 284 #ifdef KGDB 285 static int kgdb_attached = 0; 286 #endif 287 288 289 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 290 291 292 /* XXX: uwe 293 * Prepare for bus_spacification. The difference in access widths is 294 * still handled by the magic definitions in scifreg.h 295 */ 296 #define scif_smr_read() SHREG_SCSMR2 297 #define scif_smr_write(v) (SHREG_SCSMR2 = (v)) 298 299 #define scif_brr_read() SHREG_SCBRR2 300 #define scif_brr_write(v) (SHREG_SCBRR2 = (v)) 301 302 #define scif_scr_read() SHREG_SCSCR2 303 #define scif_scr_write(v) (SHREG_SCSCR2 = (v)) 304 305 #define scif_ftdr_write(v) (SHREG_SCFTDR2 = (v)) 306 307 #define scif_ssr_read() SHREG_SCSSR2 308 #define scif_ssr_write(v) (SHREG_SCSSR2 = (v)) 309 310 #define scif_frdr_read() SHREG_SCFRDR2 311 312 #define scif_fcr_read() SHREG_SCFCR2 313 #define scif_fcr_write(v) (SHREG_SCFCR2 = (v)) 314 315 #define scif_fdr_read() SHREG_SCFDR2 316 317 #ifdef SH4 /* additional registers in sh4 */ 318 319 #define scif_sptr_read() SHREG_SCSPTR2 320 #define scif_sptr_write(v) (SHREG_SCSPTR2 = (v)) 321 322 #define scif_lsr_read() SHREG_SCLSR2 323 #define scif_lsr_write(v) (SHREG_SCLSR2 = (v)) 324 325 #endif /* SH4 */ 326 327 328 void 329 InitializeScif(unsigned int bps) 330 { 331 332 /* Initialize SCR */ 333 scif_scr_write(0x00); 334 335 #if 0 336 scif_fcr_write(SCFCR2_TFRST | SCFCR2_RFRST | SCFCR2_MCE); 337 #else 338 scif_fcr_write(SCFCR2_TFRST | SCFCR2_RFRST); 339 #endif 340 /* Serial Mode Register */ 341 scif_smr_write(0x00); /* 8bit,NonParity,Even,1Stop */ 342 343 /* Bit Rate Register */ 344 scif_brr_write(divrnd(sh_clock_get_pclock(), 32 * bps) - 1); 345 346 /* 347 * wait 2m Sec, because Send/Recv must begin 1 bit period after 348 * BRR is set. 349 */ 350 delay(2000); 351 352 #if 0 353 scif_fcr_write(FIFO_RCV_TRIGGER_14 | FIFO_XMT_TRIGGER_1 | SCFCR2_MCE); 354 #else 355 scif_fcr_write(FIFO_RCV_TRIGGER_14 | FIFO_XMT_TRIGGER_1); 356 #endif 357 358 /* Send permission, Receive permission ON */ 359 scif_scr_write(SCSCR2_TE | SCSCR2_RE); 360 361 /* Serial Status Register */ 362 scif_ssr_write(scif_ssr_read() & SCSSR2_TDFE); /* Clear Status */ 363 } 364 365 int 366 ScifErrCheck(void) 367 { 368 369 return (scif_ssr_read() & (SCSSR2_ER | SCSSR2_FER | SCSSR2_PER)); 370 } 371 372 void 373 scif_putc(unsigned char c) 374 { 375 376 /* wait for ready */ 377 while ((scif_fdr_read() & SCFDR2_TXCNT) == SCFDR2_TXF_FULL) 378 continue; 379 380 /* write send data to send register */ 381 scif_ftdr_write(c); 382 383 /* clear ready flag */ 384 scif_ssr_write(scif_ssr_read() & ~(SCSSR2_TDFE | SCSSR2_TEND)); 385 } 386 387 unsigned char 388 scif_getc(void) 389 { 390 unsigned char c, err_c; 391 #ifdef SH4 392 unsigned short err_c2 = 0; /* XXXGCC: -Wuninitialized */ 393 #endif 394 395 for (;;) { 396 /* wait for ready */ 397 while ((scif_fdr_read() & SCFDR2_RECVCNT) == 0) 398 continue; 399 400 c = scif_frdr_read(); 401 err_c = scif_ssr_read(); 402 scif_ssr_write(scif_ssr_read() 403 & ~(SCSSR2_ER | SCSSR2_BRK | SCSSR2_RDF | SCSSR2_DR)); 404 #ifdef SH4 405 if (CPU_IS_SH4) { 406 err_c2 = scif_lsr_read(); 407 scif_lsr_write(scif_lsr_read() & ~SCLSR2_ORER); 408 } 409 #endif 410 if ((err_c & (SCSSR2_ER | SCSSR2_BRK | SCSSR2_FER 411 | SCSSR2_PER)) == 0) 412 { 413 #ifdef SH4 414 if (CPU_IS_SH4 && ((err_c2 & SCLSR2_ORER) == 0)) 415 #endif 416 return(c); 417 } 418 } 419 420 } 421 422 static int 423 scif_match(device_t parent, cfdata_t cfp, void *aux) 424 { 425 426 if (scif_attached) 427 return 0; 428 429 if (strcmp(cfp->cf_name, "scif") != 0) 430 return 0; 431 432 return 1; 433 } 434 435 static void 436 scif_attach(device_t parent, device_t self, void *aux) 437 { 438 struct scif_softc *sc; 439 struct tty *tp; 440 441 sc = device_private(self); 442 sc->sc_dev = self; 443 444 scif_attached = 1; 445 446 sc->sc_hwflags = 0; /* XXX */ 447 sc->sc_swflags = 0; /* XXX */ 448 sc->sc_fifolen = 16; 449 450 aprint_normal("\n"); 451 if (scifisconsole) { 452 aprint_naive(" (console)\n"); 453 aprint_normal_dev(self, "console\n"); 454 SET(sc->sc_hwflags, SCIF_HW_CONSOLE); 455 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 456 } 457 #ifdef KGDB 458 else if (kgdb_attached) { 459 aprint_naive(" (kgdb)\n"); 460 aprint_normal_dev(self, "kgdb\n"); 461 SET(sc->sc_hwflags, SCIF_HW_KGDB); 462 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 463 } 464 #endif 465 else { 466 aprint_naive("\n"); 467 InitializeScif(9600); /* XXX */ 468 } 469 470 callout_init(&sc->sc_diag_ch, 0); 471 #ifdef SH4 472 intc_intr_establish(SH4_INTEVT_SCIF_ERI, IST_LEVEL, IPL_SERIAL, 473 scifintr, sc); 474 intc_intr_establish(SH4_INTEVT_SCIF_RXI, IST_LEVEL, IPL_SERIAL, 475 scifintr, sc); 476 intc_intr_establish(SH4_INTEVT_SCIF_BRI, IST_LEVEL, IPL_SERIAL, 477 scifintr, sc); 478 intc_intr_establish(SH4_INTEVT_SCIF_TXI, IST_LEVEL, IPL_SERIAL, 479 scifintr, sc); 480 #else 481 intc_intr_establish(SH7709_INTEVT2_SCIF_ERI, IST_LEVEL, IPL_SERIAL, 482 scifintr, sc); 483 intc_intr_establish(SH7709_INTEVT2_SCIF_RXI, IST_LEVEL, IPL_SERIAL, 484 scifintr, sc); 485 intc_intr_establish(SH7709_INTEVT2_SCIF_BRI, IST_LEVEL, IPL_SERIAL, 486 scifintr, sc); 487 intc_intr_establish(SH7709_INTEVT2_SCIF_TXI, IST_LEVEL, IPL_SERIAL, 488 scifintr, sc); 489 #endif 490 491 sc->sc_si = softint_establish(SOFTINT_SERIAL, scifsoft, sc); 492 SET(sc->sc_hwflags, SCIF_HW_DEV_OK); 493 494 tp = tty_alloc(); 495 tp->t_oproc = scifstart; 496 tp->t_param = scifparam; 497 tp->t_hwiflow = NULL; 498 499 sc->sc_tty = tp; 500 sc->sc_rbuf = kmem_alloc(scif_rbuf_size << 1, KM_SLEEP); 501 sc->sc_ebuf = sc->sc_rbuf + (scif_rbuf_size << 1); 502 503 tty_attach(tp); 504 505 /* XXX: TODO */ 506 if (!pmf_device_register(self, NULL, NULL)) 507 aprint_error_dev(self, "unable to establish power handler\n"); 508 } 509 510 /* 511 * Start or restart transmission. 512 */ 513 static void 514 scifstart(struct tty *tp) 515 { 516 struct scif_softc *sc; 517 int s; 518 519 sc = device_lookup_private(&scif_cd, SCIFUNIT(tp->t_dev)); 520 521 s = spltty(); 522 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 523 goto out; 524 if (sc->sc_tx_stopped) 525 goto out; 526 if (!ttypull(tp)) 527 goto out; 528 529 /* Grab the first contiguous region of buffer space. */ 530 { 531 u_char *tba; 532 int tbc; 533 534 tba = tp->t_outq.c_cf; 535 tbc = ndqb(&tp->t_outq, 0); 536 537 (void)splserial(); 538 539 sc->sc_tba = tba; 540 sc->sc_tbc = tbc; 541 } 542 543 SET(tp->t_state, TS_BUSY); 544 sc->sc_tx_busy = 1; 545 546 /* Enable transmit completion interrupts if necessary. */ 547 scif_scr_write(scif_scr_read() | SCSCR2_TIE | SCSCR2_RIE); 548 549 /* Output the first chunk of the contiguous buffer. */ 550 { 551 int n; 552 int maxchars; 553 int i; 554 555 n = sc->sc_tbc; 556 maxchars = sc->sc_fifolen 557 - ((scif_fdr_read() & SCFDR2_TXCNT) >> 8); 558 if (n > maxchars) 559 n = maxchars; 560 561 for (i = 0; i < n; i++) { 562 scif_putc(*(sc->sc_tba)); 563 sc->sc_tba++; 564 } 565 sc->sc_tbc -= n; 566 } 567 out: 568 splx(s); 569 return; 570 } 571 572 /* 573 * Set SCIF tty parameters from termios. 574 * XXX - Should just copy the whole termios after 575 * making sure all the changes could be done. 576 */ 577 static int 578 scifparam(struct tty *tp, struct termios *t) 579 { 580 struct scif_softc *sc; 581 int ospeed = t->c_ospeed; 582 int s; 583 584 sc = device_lookup_private(&scif_cd, SCIFUNIT(tp->t_dev)); 585 if (!device_is_active(sc->sc_dev)) 586 return (EIO); 587 588 /* Check requested parameters. */ 589 if (ospeed < 0) 590 return (EINVAL); 591 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 592 return (EINVAL); 593 594 /* 595 * For the console, always force CLOCAL and !HUPCL, so that the port 596 * is always active. 597 */ 598 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 599 ISSET(sc->sc_hwflags, SCIF_HW_CONSOLE)) { 600 SET(t->c_cflag, CLOCAL); 601 CLR(t->c_cflag, HUPCL); 602 } 603 604 /* 605 * If there were no changes, don't do anything. This avoids dropping 606 * input and improves performance when all we did was frob things like 607 * VMIN and VTIME. 608 */ 609 if (tp->t_ospeed == t->c_ospeed && 610 tp->t_cflag == t->c_cflag) 611 return (0); 612 613 #if 0 614 /* XXX (msaitoh) */ 615 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 616 #endif 617 618 s = splserial(); 619 620 /* 621 * Set the flow control pins depending on the current flow control 622 * mode. 623 */ 624 if (ISSET(t->c_cflag, CRTSCTS)) { 625 scif_fcr_write(scif_fcr_read() | SCFCR2_MCE); 626 } else { 627 scif_fcr_write(scif_fcr_read() & ~SCFCR2_MCE); 628 } 629 630 scif_brr_write(divrnd(sh_clock_get_pclock(), 32 * ospeed) -1); 631 632 /* 633 * Set the FIFO threshold based on the receive speed. 634 * 635 * * If it's a low speed, it's probably a mouse or some other 636 * interactive device, so set the threshold low. 637 * * If it's a high speed, trim the trigger level down to prevent 638 * overflows. 639 * * Otherwise set it a bit higher. 640 */ 641 #if 0 642 /* XXX (msaitoh) */ 643 if (ISSET(sc->sc_hwflags, SCIF_HW_HAYESP)) 644 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 645 else if (ISSET(sc->sc_hwflags, SCIF_HW_FIFO)) 646 sc->sc_fifo = FIFO_ENABLE | 647 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 648 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 649 else 650 sc->sc_fifo = 0; 651 #endif 652 653 /* And copy to tty. */ 654 tp->t_ispeed = 0; 655 tp->t_ospeed = t->c_ospeed; 656 tp->t_cflag = t->c_cflag; 657 658 if (!sc->sc_heldchange) { 659 if (sc->sc_tx_busy) { 660 sc->sc_heldtbc = sc->sc_tbc; 661 sc->sc_tbc = 0; 662 sc->sc_heldchange = 1; 663 } 664 #if 0 665 /* XXX (msaitoh) */ 666 else 667 scif_loadchannelregs(sc); 668 #endif 669 } 670 671 if (!ISSET(t->c_cflag, CHWFLOW)) { 672 /* Disable the high water mark. */ 673 sc->sc_r_hiwat = 0; 674 sc->sc_r_lowat = 0; 675 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 676 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 677 scif_schedrx(sc); 678 } 679 } else { 680 sc->sc_r_hiwat = scif_rbuf_hiwat; 681 sc->sc_r_lowat = scif_rbuf_lowat; 682 } 683 684 splx(s); 685 686 #ifdef SCIF_DEBUG 687 if (scif_debug) 688 scifstatus(sc, "scifparam "); 689 #endif 690 691 if (!ISSET(t->c_cflag, CHWFLOW)) { 692 if (sc->sc_tx_stopped) { 693 sc->sc_tx_stopped = 0; 694 scifstart(tp); 695 } 696 } 697 698 return (0); 699 } 700 701 static void 702 scif_iflush(struct scif_softc *sc) 703 { 704 int i; 705 706 i = scif_fdr_read() & SCFDR2_RECVCNT; 707 708 while (i > 0) { 709 (void)scif_frdr_read(); 710 scif_ssr_write(scif_ssr_read() & ~(SCSSR2_RDF | SCSSR2_DR)); 711 i--; 712 } 713 } 714 715 int 716 scifopen(dev_t dev, int flag, int mode, struct lwp *l) 717 { 718 struct scif_softc *sc; 719 struct tty *tp; 720 int s, s2; 721 int error; 722 723 sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); 724 if (sc == 0 || !ISSET(sc->sc_hwflags, SCIF_HW_DEV_OK) || 725 sc->sc_rbuf == NULL) 726 return (ENXIO); 727 728 if (!device_is_active(sc->sc_dev)) 729 return (ENXIO); 730 731 #ifdef KGDB 732 /* 733 * If this is the kgdb port, no other use is permitted. 734 */ 735 if (ISSET(sc->sc_hwflags, SCIF_HW_KGDB)) 736 return (EBUSY); 737 #endif /* KGDB */ 738 739 tp = sc->sc_tty; 740 741 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 742 return (EBUSY); 743 744 s = spltty(); 745 746 /* 747 * Do the following iff this is a first open. 748 */ 749 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 750 struct termios t; 751 752 tp->t_dev = dev; 753 754 s2 = splserial(); 755 756 /* Turn on interrupts. */ 757 scif_scr_write(scif_scr_read() | SCSCR2_TIE | SCSCR2_RIE); 758 759 splx(s2); 760 761 /* 762 * Initialize the termios status to the defaults. Add in the 763 * sticky bits from TIOCSFLAGS. 764 */ 765 t.c_ispeed = 0; 766 if (ISSET(sc->sc_hwflags, SCIF_HW_CONSOLE)) { 767 t.c_ospeed = scifcn_speed; /* XXX (msaitoh) */ 768 t.c_cflag = scifconscflag; 769 } else { 770 t.c_ospeed = TTYDEF_SPEED; 771 t.c_cflag = TTYDEF_CFLAG; 772 } 773 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 774 SET(t.c_cflag, CLOCAL); 775 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 776 SET(t.c_cflag, CRTSCTS); 777 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 778 SET(t.c_cflag, MDMBUF); 779 /* Make sure scifparam() will do something. */ 780 tp->t_ospeed = 0; 781 (void) scifparam(tp, &t); 782 tp->t_iflag = TTYDEF_IFLAG; 783 tp->t_oflag = TTYDEF_OFLAG; 784 tp->t_lflag = TTYDEF_LFLAG; 785 ttychars(tp); 786 ttsetwater(tp); 787 788 s2 = splserial(); 789 790 /* Clear the input ring, and unblock. */ 791 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 792 sc->sc_rbavail = scif_rbuf_size; 793 scif_iflush(sc); 794 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 795 #if 0 796 /* XXX (msaitoh) */ 797 scif_hwiflow(sc); 798 #endif 799 800 #ifdef SCIF_DEBUG 801 if (scif_debug) 802 scifstatus(sc, "scifopen "); 803 #endif 804 805 splx(s2); 806 } 807 808 splx(s); 809 810 error = ttyopen(tp, SCIFDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 811 if (error) 812 goto bad; 813 814 error = (*tp->t_linesw->l_open)(dev, tp); 815 if (error) 816 goto bad; 817 818 return (0); 819 820 bad: 821 822 return (error); 823 } 824 825 int 826 scifclose(dev_t dev, int flag, int mode, struct lwp *l) 827 { 828 struct scif_softc *sc; 829 struct tty *tp; 830 831 sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); 832 tp = sc->sc_tty; 833 834 /* XXX This is for cons.c. */ 835 if (!ISSET(tp->t_state, TS_ISOPEN)) 836 return (0); 837 838 (*tp->t_linesw->l_close)(tp, flag); 839 ttyclose(tp); 840 841 if (!device_is_active(sc->sc_dev)) 842 return (0); 843 844 return (0); 845 } 846 847 int 848 scifread(dev_t dev, struct uio *uio, int flag) 849 { 850 struct scif_softc *sc; 851 struct tty *tp; 852 853 sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); 854 tp = sc->sc_tty; 855 856 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 857 } 858 859 int 860 scifwrite(dev_t dev, struct uio *uio, int flag) 861 { 862 struct scif_softc *sc; 863 struct tty *tp; 864 865 sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); 866 tp = sc->sc_tty; 867 868 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 869 } 870 871 int 872 scifpoll(dev_t dev, int events, struct lwp *l) 873 { 874 struct scif_softc *sc; 875 struct tty *tp; 876 877 sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); 878 tp = sc->sc_tty; 879 880 return ((*tp->t_linesw->l_poll)(tp, events, l)); 881 } 882 883 struct tty * 884 sciftty(dev_t dev) 885 { 886 struct scif_softc *sc; 887 struct tty *tp; 888 889 sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); 890 tp = sc->sc_tty; 891 892 return (tp); 893 } 894 895 int 896 scifioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 897 { 898 struct scif_softc *sc; 899 struct tty *tp; 900 int error; 901 int s; 902 903 sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); 904 if (!device_is_active(sc->sc_dev)) 905 return (EIO); 906 907 tp = sc->sc_tty; 908 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 909 if (error != EPASSTHROUGH) 910 return (error); 911 912 error = ttioctl(tp, cmd, data, flag, l); 913 if (error != EPASSTHROUGH) 914 return (error); 915 916 error = 0; 917 918 s = splserial(); 919 920 switch (cmd) { 921 case TIOCSBRK: 922 scif_break(sc, 1); 923 break; 924 925 case TIOCCBRK: 926 scif_break(sc, 0); 927 break; 928 929 case TIOCGFLAGS: 930 *(int *)data = sc->sc_swflags; 931 break; 932 933 case TIOCSFLAGS: 934 error = kauth_authorize_device_tty(l->l_cred, 935 KAUTH_DEVICE_TTY_PRIVSET, tp); 936 if (error) 937 break; 938 sc->sc_swflags = *(int *)data; 939 break; 940 941 default: 942 error = EPASSTHROUGH; 943 break; 944 } 945 946 splx(s); 947 948 return (error); 949 } 950 951 static void 952 scif_schedrx(struct scif_softc *sc) 953 { 954 955 sc->sc_rx_ready = 1; 956 957 /* Wake up the poller. */ 958 softint_schedule(sc->sc_si); 959 } 960 961 static void 962 scif_break(struct scif_softc *sc, int onoff) 963 { 964 965 if (onoff) 966 scif_ssr_write(scif_ssr_read() & ~SCSSR2_TDFE); 967 else 968 scif_ssr_write(scif_ssr_read() | SCSSR2_TDFE); 969 970 #if 0 /* XXX */ 971 if (!sc->sc_heldchange) { 972 if (sc->sc_tx_busy) { 973 sc->sc_heldtbc = sc->sc_tbc; 974 sc->sc_tbc = 0; 975 sc->sc_heldchange = 1; 976 } else 977 scif_loadchannelregs(sc); 978 } 979 #endif 980 } 981 982 /* 983 * Stop output, e.g., for ^S or output flush. 984 */ 985 void 986 scifstop(struct tty *tp, int flag) 987 { 988 struct scif_softc *sc; 989 int s; 990 991 sc = device_lookup_private(&scif_cd, SCIFUNIT(tp->t_dev)); 992 993 s = splserial(); 994 if (ISSET(tp->t_state, TS_BUSY)) { 995 /* Stop transmitting at the next chunk. */ 996 sc->sc_tbc = 0; 997 sc->sc_heldtbc = 0; 998 if (!ISSET(tp->t_state, TS_TTSTOP)) 999 SET(tp->t_state, TS_FLUSH); 1000 } 1001 splx(s); 1002 } 1003 1004 static void 1005 scifdiag(void *arg) 1006 { 1007 struct scif_softc *sc = arg; 1008 int overflows, floods; 1009 int s; 1010 1011 s = splserial(); 1012 overflows = sc->sc_overflows; 1013 sc->sc_overflows = 0; 1014 floods = sc->sc_floods; 1015 sc->sc_floods = 0; 1016 sc->sc_errors = 0; 1017 splx(s); 1018 1019 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 1020 device_xname(sc->sc_dev), 1021 overflows, overflows == 1 ? "" : "s", 1022 floods, floods == 1 ? "" : "s"); 1023 } 1024 1025 static void 1026 scif_rxsoft(struct scif_softc *sc, struct tty *tp) 1027 { 1028 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1029 u_char *get, *end; 1030 u_int cc, scc; 1031 u_char ssr2; 1032 int code; 1033 int s; 1034 1035 end = sc->sc_ebuf; 1036 get = sc->sc_rbget; 1037 scc = cc = scif_rbuf_size - sc->sc_rbavail; 1038 1039 if (cc == scif_rbuf_size) { 1040 sc->sc_floods++; 1041 if (sc->sc_errors++ == 0) 1042 callout_reset(&sc->sc_diag_ch, 60 * hz, scifdiag, sc); 1043 } 1044 1045 while (cc) { 1046 code = get[0]; 1047 ssr2 = get[1]; 1048 if (ISSET(ssr2, SCSSR2_BRK | SCSSR2_FER | SCSSR2_PER)) { 1049 if (ISSET(ssr2, SCSSR2_BRK | SCSSR2_FER)) 1050 SET(code, TTY_FE); 1051 if (ISSET(ssr2, SCSSR2_PER)) 1052 SET(code, TTY_PE); 1053 } 1054 if ((*rint)(code, tp) == -1) { 1055 /* 1056 * The line discipline's buffer is out of space. 1057 */ 1058 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1059 /* 1060 * We're either not using flow control, or the 1061 * line discipline didn't tell us to block for 1062 * some reason. Either way, we have no way to 1063 * know when there's more space available, so 1064 * just drop the rest of the data. 1065 */ 1066 get += cc << 1; 1067 if (get >= end) 1068 get -= scif_rbuf_size << 1; 1069 cc = 0; 1070 } else { 1071 /* 1072 * Don't schedule any more receive processing 1073 * until the line discipline tells us there's 1074 * space available (through scifhwiflow()). 1075 * Leave the rest of the data in the input 1076 * buffer. 1077 */ 1078 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1079 } 1080 break; 1081 } 1082 get += 2; 1083 if (get >= end) 1084 get = sc->sc_rbuf; 1085 cc--; 1086 } 1087 1088 if (cc != scc) { 1089 sc->sc_rbget = get; 1090 s = splserial(); 1091 cc = sc->sc_rbavail += scc - cc; 1092 /* Buffers should be ok again, release possible block. */ 1093 if (cc >= sc->sc_r_lowat) { 1094 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1095 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1096 scif_scr_write(scif_scr_read() | SCSCR2_RIE); 1097 } 1098 #if 0 1099 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1100 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1101 scif_hwiflow(sc); 1102 } 1103 #endif 1104 } 1105 splx(s); 1106 } 1107 } 1108 1109 static void 1110 scif_txsoft(struct scif_softc *sc, struct tty *tp) 1111 { 1112 1113 CLR(tp->t_state, TS_BUSY); 1114 if (ISSET(tp->t_state, TS_FLUSH)) 1115 CLR(tp->t_state, TS_FLUSH); 1116 else 1117 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1118 (*tp->t_linesw->l_start)(tp); 1119 } 1120 1121 #if 0 /* XXX (msaitoh) */ 1122 static void 1123 scif_stsoft(struct scif_softc *sc, struct tty *tp) 1124 { 1125 u_char msr, delta; 1126 int s; 1127 1128 s = splserial(); 1129 msr = sc->sc_msr; 1130 delta = sc->sc_msr_delta; 1131 sc->sc_msr_delta = 0; 1132 splx(s); 1133 1134 if (ISSET(delta, sc->sc_msr_dcd)) { 1135 /* 1136 * Inform the tty layer that carrier detect changed. 1137 */ 1138 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1139 } 1140 1141 if (ISSET(delta, sc->sc_msr_cts)) { 1142 /* Block or unblock output according to flow control. */ 1143 if (ISSET(msr, sc->sc_msr_cts)) { 1144 sc->sc_tx_stopped = 0; 1145 (*tp->t_linesw->l_start)(tp); 1146 } else { 1147 sc->sc_tx_stopped = 1; 1148 } 1149 } 1150 1151 #ifdef SCIF_DEBUG 1152 if (scif_debug) 1153 scifstatus(sc, "scif_stsoft"); 1154 #endif 1155 } 1156 #endif /* 0 */ 1157 1158 static void 1159 scifsoft(void *arg) 1160 { 1161 struct scif_softc *sc = arg; 1162 struct tty *tp; 1163 1164 if (!device_is_active(sc->sc_dev)) 1165 return; 1166 1167 tp = sc->sc_tty; 1168 1169 if (sc->sc_rx_ready) { 1170 sc->sc_rx_ready = 0; 1171 scif_rxsoft(sc, tp); 1172 } 1173 1174 #if 0 1175 if (sc->sc_st_check) { 1176 sc->sc_st_check = 0; 1177 scif_stsoft(sc, tp); 1178 } 1179 #endif 1180 1181 if (sc->sc_tx_done) { 1182 sc->sc_tx_done = 0; 1183 scif_txsoft(sc, tp); 1184 } 1185 } 1186 1187 static int 1188 scifintr(void *arg) 1189 { 1190 struct scif_softc *sc = arg; 1191 u_char *put, *end; 1192 u_int cc; 1193 u_short ssr2; 1194 int count; 1195 1196 if (!device_is_active(sc->sc_dev)) 1197 return (0); 1198 1199 end = sc->sc_ebuf; 1200 put = sc->sc_rbput; 1201 cc = sc->sc_rbavail; 1202 1203 do { 1204 ssr2 = scif_ssr_read(); 1205 if (ISSET(ssr2, SCSSR2_BRK)) { 1206 scif_ssr_write(scif_ssr_read() 1207 & ~(SCSSR2_ER | SCSSR2_BRK | SCSSR2_DR)); 1208 #ifdef DDB 1209 if (ISSET(sc->sc_hwflags, SCIF_HW_CONSOLE)) { 1210 console_debugger(); 1211 } 1212 #endif /* DDB */ 1213 #ifdef KGDB 1214 if (ISSET(sc->sc_hwflags, SCIF_HW_KGDB)) { 1215 kgdb_connect(1); 1216 } 1217 #endif /* KGDB */ 1218 } 1219 count = scif_fdr_read() & SCFDR2_RECVCNT; 1220 if (count != 0) { 1221 for (;;) { 1222 u_char c = scif_frdr_read(); 1223 u_char err = (u_char)(scif_ssr_read() & 0x00ff); 1224 1225 scif_ssr_write(scif_ssr_read() 1226 & ~(SCSSR2_ER | SCSSR2_RDF | SCSSR2_DR)); 1227 #ifdef SH4 1228 if (CPU_IS_SH4) 1229 scif_lsr_write(scif_lsr_read() 1230 & ~SCLSR2_ORER); 1231 #endif 1232 if ((cc > 0) && (count > 0)) { 1233 put[0] = c; 1234 put[1] = err; 1235 put += 2; 1236 if (put >= end) 1237 put = sc->sc_rbuf; 1238 cc--; 1239 count--; 1240 } else 1241 break; 1242 } 1243 1244 /* 1245 * Current string of incoming characters ended because 1246 * no more data was available or we ran out of space. 1247 * Schedule a receive event if any data was received. 1248 * If we're out of space, turn off receive interrupts. 1249 */ 1250 sc->sc_rbput = put; 1251 sc->sc_rbavail = cc; 1252 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1253 sc->sc_rx_ready = 1; 1254 1255 /* 1256 * See if we are in danger of overflowing a buffer. If 1257 * so, use hardware flow control to ease the pressure. 1258 */ 1259 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1260 cc < sc->sc_r_hiwat) { 1261 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1262 #if 0 1263 scif_hwiflow(sc); 1264 #endif 1265 } 1266 1267 /* 1268 * If we're out of space, disable receive interrupts 1269 * until the queue has drained a bit. 1270 */ 1271 if (!cc) { 1272 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1273 scif_scr_write(scif_scr_read() & ~SCSCR2_RIE); 1274 } 1275 } else { 1276 if (scif_ssr_read() & (SCSSR2_RDF | SCSSR2_DR)) { 1277 scif_scr_write(scif_scr_read() 1278 & ~(SCSCR2_TIE | SCSCR2_RIE)); 1279 delay(10); 1280 scif_scr_write(scif_scr_read() 1281 | SCSCR2_TIE | SCSCR2_RIE); 1282 continue; 1283 } 1284 } 1285 } while (scif_ssr_read() & (SCSSR2_RDF | SCSSR2_DR)); 1286 1287 #if 0 1288 msr = bus_space_read_1(iot, ioh, scif_msr); 1289 delta = msr ^ sc->sc_msr; 1290 sc->sc_msr = msr; 1291 if (ISSET(delta, sc->sc_msr_mask)) { 1292 SET(sc->sc_msr_delta, delta); 1293 1294 /* 1295 * Pulse-per-second clock signal on edge of DCD? 1296 */ 1297 if (ISSET(delta, sc->sc_ppsmask)) { 1298 struct timeval tv; 1299 if (ISSET(msr, sc->sc_ppsmask) == 1300 sc->sc_ppsassert) { 1301 /* XXX nanotime() */ 1302 microtime(&tv); 1303 TIMEVAL_TO_TIMESPEC(&tv, 1304 &sc->ppsinfo.assert_timestamp); 1305 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1306 timespecadd(&sc->ppsinfo.assert_timestamp, 1307 &sc->ppsparam.assert_offset, 1308 &sc->ppsinfo.assert_timestamp); 1309 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1310 } 1311 1312 #ifdef PPS_SYNC 1313 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1314 hardpps(&tv, tv.tv_usec); 1315 #endif 1316 sc->ppsinfo.assert_sequence++; 1317 sc->ppsinfo.current_mode = 1318 sc->ppsparam.mode; 1319 1320 } else if (ISSET(msr, sc->sc_ppsmask) == 1321 sc->sc_ppsclear) { 1322 /* XXX nanotime() */ 1323 microtime(&tv); 1324 TIMEVAL_TO_TIMESPEC(&tv, 1325 &sc->ppsinfo.clear_timestamp); 1326 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1327 timespecadd(&sc->ppsinfo.clear_timestamp, 1328 &sc->ppsparam.clear_offset, 1329 &sc->ppsinfo.clear_timestamp); 1330 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1331 } 1332 1333 #ifdef PPS_SYNC 1334 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1335 hardpps(&tv, tv.tv_usec); 1336 #endif 1337 sc->ppsinfo.clear_sequence++; 1338 sc->ppsinfo.current_mode = 1339 sc->ppsparam.mode; 1340 } 1341 } 1342 1343 /* 1344 * Stop output immediately if we lose the output 1345 * flow control signal or carrier detect. 1346 */ 1347 if (ISSET(~msr, sc->sc_msr_mask)) { 1348 sc->sc_tbc = 0; 1349 sc->sc_heldtbc = 0; 1350 #ifdef SCIF_DEBUG 1351 if (scif_debug) 1352 scifstatus(sc, "scifintr "); 1353 #endif 1354 } 1355 1356 sc->sc_st_check = 1; 1357 } 1358 #endif 1359 1360 /* 1361 * Done handling any receive interrupts. See if data can be 1362 * transmitted as well. Schedule tx done event if no data left 1363 * and tty was marked busy. 1364 */ 1365 if (((scif_fdr_read() & SCFDR2_TXCNT) >> 8) != 16) { /* XXX (msaitoh) */ 1366 /* 1367 * If we've delayed a parameter change, do it now, and restart 1368 * output. 1369 */ 1370 if (sc->sc_heldchange) { 1371 sc->sc_heldchange = 0; 1372 sc->sc_tbc = sc->sc_heldtbc; 1373 sc->sc_heldtbc = 0; 1374 } 1375 1376 /* Output the next chunk of the contiguous buffer, if any. */ 1377 if (sc->sc_tbc > 0) { 1378 int n; 1379 int maxchars; 1380 int i; 1381 1382 n = sc->sc_tbc; 1383 maxchars = sc->sc_fifolen - 1384 ((scif_fdr_read() & SCFDR2_TXCNT) >> 8); 1385 if (n > maxchars) 1386 n = maxchars; 1387 1388 for (i = 0; i < n; i++) { 1389 scif_putc(*(sc->sc_tba)); 1390 sc->sc_tba++; 1391 } 1392 sc->sc_tbc -= n; 1393 } else { 1394 /* Disable transmit completion interrupts if necessary. */ 1395 #if 0 1396 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1397 #endif 1398 scif_scr_write(scif_scr_read() & ~SCSCR2_TIE); 1399 1400 if (sc->sc_tx_busy) { 1401 sc->sc_tx_busy = 0; 1402 sc->sc_tx_done = 1; 1403 } 1404 } 1405 } 1406 1407 /* Wake up the poller. */ 1408 softint_schedule(sc->sc_si); 1409 1410 #ifdef RND_SCIF 1411 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1412 #endif 1413 1414 return (1); 1415 } 1416 1417 void 1418 scifcnprobe(struct consdev *cp) 1419 { 1420 int maj; 1421 1422 /* locate the major number */ 1423 maj = cdevsw_lookup_major(&scif_cdevsw); 1424 1425 /* Initialize required fields. */ 1426 cp->cn_dev = makedev(maj, 0); 1427 if (scifconsole) 1428 cp->cn_pri = CN_REMOTE; 1429 else 1430 cp->cn_pri = CN_NORMAL; 1431 } 1432 1433 void 1434 scifcninit(struct consdev *cp) 1435 { 1436 1437 InitializeScif(scifcn_speed); 1438 scifisconsole = 1; 1439 } 1440 1441 int 1442 scifcngetc(dev_t dev) 1443 { 1444 int c; 1445 int s; 1446 1447 s = splserial(); 1448 c = scif_getc(); 1449 splx(s); 1450 1451 return (c); 1452 } 1453 1454 void 1455 scifcnputc(dev_t dev, int c) 1456 { 1457 int s; 1458 1459 s = splserial(); 1460 scif_putc((u_char)c); 1461 splx(s); 1462 } 1463 1464 #ifdef KGDB 1465 int 1466 scif_kgdb_init(void) 1467 { 1468 1469 if (strcmp(kgdb_devname, "scif") != 0) 1470 return (1); 1471 1472 if (scifisconsole) 1473 return (1); /* can't share with console */ 1474 1475 InitializeScif(kgdb_rate); 1476 1477 kgdb_attach((int (*)(void *))scifcngetc, 1478 (void (*)(void *, int))scifcnputc, NULL); 1479 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 1480 kgdb_attached = 1; 1481 1482 return (0); 1483 } 1484 #endif /* KGDB */ 1485