scif.c revision 1.53
1 /* $NetBSD: scif.c,v 1.53 2007/11/06 05:01:26 uwe 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. Neither the name of the University nor the names of its contributors 78 * may be used to endorse or promote products derived from this software 79 * without specific prior written permission. 80 * 81 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 82 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 83 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 84 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 85 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 86 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 87 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 88 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 89 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 90 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 91 * SUCH DAMAGE. 92 * 93 * @(#)com.c 7.5 (Berkeley) 5/16/91 94 */ 95 96 /* 97 * SH internal serial driver 98 * 99 * This code is derived from both z8530tty.c and com.c 100 */ 101 102 #include <sys/cdefs.h> 103 __KERNEL_RCSID(0, "$NetBSD: scif.c,v 1.53 2007/11/06 05:01:26 uwe Exp $"); 104 105 #include "opt_kgdb.h" 106 #include "opt_scif.h" 107 108 #include <sys/param.h> 109 #include <sys/systm.h> 110 #include <sys/tty.h> 111 #include <sys/proc.h> 112 #include <sys/conf.h> 113 #include <sys/file.h> 114 #include <sys/syslog.h> 115 #include <sys/kernel.h> 116 #include <sys/device.h> 117 #include <sys/malloc.h> 118 #include <sys/kgdb.h> 119 #include <sys/kauth.h> 120 121 #include <dev/cons.h> 122 123 #include <sh3/clock.h> 124 #include <sh3/exception.h> 125 #include <sh3/scifreg.h> 126 #include <machine/intr.h> 127 128 #include <sh3/dev/scifvar.h> 129 130 #include "locators.h" 131 132 133 struct scif_softc { 134 struct device sc_dev; /* boilerplate */ 135 136 struct tty *sc_tty; 137 void *sc_si; 138 139 callout_t sc_diag_ch; 140 141 #if 0 142 bus_space_tag_t sc_iot; /* ISA i/o space identifier */ 143 bus_space_handle_t sc_ioh; /* ISA io handle */ 144 145 int sc_drq; 146 147 int sc_frequency; 148 #endif 149 150 u_int sc_overflows, 151 sc_floods, 152 sc_errors; /* number of retries so far */ 153 u_char sc_status[7]; /* copy of registers */ 154 155 int sc_hwflags; 156 int sc_swflags; 157 u_int sc_fifolen; 158 159 u_int sc_r_hiwat, 160 sc_r_lowat; 161 u_char *volatile sc_rbget, 162 *volatile sc_rbput; 163 volatile u_int sc_rbavail; 164 u_char *sc_rbuf, 165 *sc_ebuf; 166 167 u_char *sc_tba; /* transmit buffer address */ 168 u_int sc_tbc, /* transmit byte count */ 169 sc_heldtbc; 170 171 volatile u_char sc_rx_flags, 172 #define RX_TTY_BLOCKED 0x01 173 #define RX_TTY_OVERFLOWED 0x02 174 #define RX_IBUF_BLOCKED 0x04 175 #define RX_IBUF_OVERFLOWED 0x08 176 #define RX_ANY_BLOCK 0x0f 177 sc_tx_busy, /* working on an output chunk */ 178 sc_tx_done, /* done with one output chunk */ 179 sc_tx_stopped, /* H/W level stop (lost CTS) */ 180 sc_st_check, /* got a status interrupt */ 181 sc_rx_ready; 182 183 volatile u_char sc_heldchange; 184 }; 185 186 187 static int scif_match(device_t, struct cfdata *, void *); 188 static void scif_attach(device_t, device_t, void *); 189 190 CFATTACH_DECL(scif, sizeof(struct scif_softc), 191 scif_match, scif_attach, NULL, NULL); 192 193 static int scif_attached = 0; /* XXX: FIXME: don't limit to just one! */ 194 195 extern struct cfdriver scif_cd; 196 197 #define SCIFUNIT_MASK 0x7ffff 198 #define SCIFDIALOUT_MASK 0x80000 199 200 #define SCIFUNIT(x) (minor(x) & SCIFUNIT_MASK) 201 #define SCIFDIALOUT(x) (minor(x) & SCIFDIALOUT_MASK) 202 203 204 /* console */ 205 dev_type_cnprobe(scifcnprobe); 206 dev_type_cninit(scifcninit); 207 dev_type_cngetc(scifcngetc); 208 dev_type_cnputc(scifcnputc); 209 210 211 /* cdevsw */ 212 dev_type_open(scifopen); 213 dev_type_close(scifclose); 214 dev_type_read(scifread); 215 dev_type_write(scifwrite); 216 dev_type_ioctl(scifioctl); 217 dev_type_stop(scifstop); 218 dev_type_tty(sciftty); 219 dev_type_poll(scifpoll); 220 221 const struct cdevsw scif_cdevsw = { 222 scifopen, scifclose, scifread, scifwrite, scifioctl, 223 scifstop, sciftty, scifpoll, nommap, ttykqfilter, D_TTY 224 }; 225 226 227 /* struct tty */ 228 static void scifstart(struct tty *); 229 static int scifparam(struct tty *, struct termios *); 230 231 232 void InitializeScif (unsigned int); 233 int ScifErrCheck(void); 234 void scif_putc(unsigned char); 235 unsigned char scif_getc(void); 236 237 static int scifintr(void *); 238 static void scifsoft(void *); 239 static void scif_rxsoft(struct scif_softc *, struct tty *); 240 static void scif_txsoft(struct scif_softc *, struct tty *); 241 #if 0 242 static void scif_stsoft(struct scif_softc *, struct tty *); 243 #endif 244 static void scif_schedrx(struct scif_softc *); 245 static void scifdiag(void *); 246 247 static void scif_break(struct scif_softc *, int); 248 static void scif_iflush(struct scif_softc *); 249 250 251 /* Hardware flag masks (sc_hwflags) */ 252 #define SCIF_HW_NOIEN 0x01 253 #define SCIF_HW_FIFO 0x02 254 #define SCIF_HW_FLOW 0x08 255 #define SCIF_HW_DEV_OK 0x20 256 #define SCIF_HW_CONSOLE 0x40 257 #define SCIF_HW_KGDB 0x80 258 259 260 /* Buffer size for character buffer */ 261 #define SCIF_RING_SIZE 2048 262 static unsigned int scif_rbuf_size = SCIF_RING_SIZE; 263 264 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 265 static unsigned int scif_rbuf_hiwat = (SCIF_RING_SIZE * 1) / 4; 266 static unsigned int scif_rbuf_lowat = (SCIF_RING_SIZE * 3) / 4; 267 268 269 #ifdef SCIFCN_SPEED 270 unsigned int scifcn_speed = SCIFCN_SPEED; 271 #else 272 unsigned int scifcn_speed = 9600; 273 #endif 274 275 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 276 int scifconscflag = CONMODE; 277 278 static int scifisconsole = 0; 279 280 #ifdef KGDB 281 static int kgdb_attached = 0; 282 #endif 283 284 285 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 286 287 288 /* XXX: uwe 289 * Prepare for bus_spacification. The difference in access widths is 290 * still handled by the magic definitions in scifreg.h 291 */ 292 #define scif_smr_read() SHREG_SCSMR2 293 #define scif_smr_write(v) (SHREG_SCSMR2 = (v)) 294 295 #define scif_brr_read() SHREG_SCBRR2 296 #define scif_brr_write(v) (SHREG_SCBRR2 = (v)) 297 298 #define scif_scr_read() SHREG_SCSCR2 299 #define scif_scr_write(v) (SHREG_SCSCR2 = (v)) 300 301 #define scif_ftdr_write(v) (SHREG_SCFTDR2 = (v)) 302 303 #define scif_ssr_read() SHREG_SCSSR2 304 #define scif_ssr_write(v) (SHREG_SCSSR2 = (v)) 305 306 #define scif_frdr_read() SHREG_SCFRDR2 307 308 #define scif_fcr_read() SHREG_SCFCR2 309 #define scif_fcr_write(v) (SHREG_SCFCR2 = (v)) 310 311 #define scif_fdr_read() SHREG_SCFDR2 312 313 #ifdef SH4 /* additional registers in sh4 */ 314 315 #define scif_sptr_read() SHREG_SCSPTR2 316 #define scif_sptr_write(v) (SHREG_SCSPTR2 = (v)) 317 318 #define scif_lsr_read() SHREG_SCLSR2 319 #define scif_lsr_write(v) (SHREG_SCLSR2 = (v)) 320 321 #endif /* SH4 */ 322 323 324 void 325 InitializeScif(unsigned int bps) 326 { 327 328 /* Initialize SCR */ 329 scif_scr_write(0x00); 330 331 #if 0 332 scif_fcr_write(SCFCR2_TFRST | SCFCR2_RFRST | SCFCR2_MCE); 333 #else 334 scif_fcr_write(SCFCR2_TFRST | SCFCR2_RFRST); 335 #endif 336 /* Serial Mode Register */ 337 scif_smr_write(0x00); /* 8bit,NonParity,Even,1Stop */ 338 339 /* Bit Rate Register */ 340 scif_brr_write(divrnd(sh_clock_get_pclock(), 32 * bps) - 1); 341 342 /* 343 * wait 2m Sec, because Send/Recv must begin 1 bit period after 344 * BRR is set. 345 */ 346 delay(2000); 347 348 #if 0 349 scif_fcr_write(FIFO_RCV_TRIGGER_14 | FIFO_XMT_TRIGGER_1 | SCFCR2_MCE); 350 #else 351 scif_fcr_write(FIFO_RCV_TRIGGER_14 | FIFO_XMT_TRIGGER_1); 352 #endif 353 354 /* Send permission, Receive permission ON */ 355 scif_scr_write(SCSCR2_TE | SCSCR2_RE); 356 357 /* Serial Status Register */ 358 scif_ssr_write(scif_ssr_read() & SCSSR2_TDFE); /* Clear Status */ 359 } 360 361 int 362 ScifErrCheck(void) 363 { 364 365 return (scif_ssr_read() & (SCSSR2_ER | SCSSR2_FER | SCSSR2_PER)); 366 } 367 368 void 369 scif_putc(unsigned char c) 370 { 371 372 /* wait for ready */ 373 while ((scif_fdr_read() & SCFDR2_TXCNT) == SCFDR2_TXF_FULL) 374 continue; 375 376 /* write send data to send register */ 377 scif_ftdr_write(c); 378 379 /* clear ready flag */ 380 scif_ssr_write(scif_ssr_read() & ~(SCSSR2_TDFE | SCSSR2_TEND)); 381 } 382 383 unsigned char 384 scif_getc(void) 385 { 386 unsigned char c, err_c; 387 #ifdef SH4 388 unsigned short err_c2 = 0; /* XXXGCC: -Wuninitialized */ 389 #endif 390 391 for (;;) { 392 /* wait for ready */ 393 while ((scif_fdr_read() & SCFDR2_RECVCNT) == 0) 394 continue; 395 396 c = scif_frdr_read(); 397 err_c = scif_ssr_read(); 398 scif_ssr_write(scif_ssr_read() 399 & ~(SCSSR2_ER | SCSSR2_BRK | SCSSR2_RDF | SCSSR2_DR)); 400 #ifdef SH4 401 if (CPU_IS_SH4) { 402 err_c2 = scif_lsr_read(); 403 scif_lsr_write(scif_lsr_read() & ~SCLSR2_ORER); 404 } 405 #endif 406 if ((err_c & (SCSSR2_ER | SCSSR2_BRK | SCSSR2_FER 407 | SCSSR2_PER)) == 0) 408 { 409 #ifdef SH4 410 if (CPU_IS_SH4 && ((err_c2 & SCLSR2_ORER) == 0)) 411 #endif 412 return(c); 413 } 414 } 415 416 } 417 418 static int 419 scif_match(device_t parent, struct cfdata *cfp, void *aux) 420 { 421 422 if (scif_attached) 423 return 0; 424 425 if (strcmp(cfp->cf_name, "scif") != 0) 426 return 0; 427 428 return 1; 429 } 430 431 static void 432 scif_attach(device_t parent, device_t self, void *aux) 433 { 434 struct scif_softc *sc = device_private(self); 435 struct tty *tp; 436 437 scif_attached = 1; 438 439 sc->sc_hwflags = 0; /* XXX */ 440 sc->sc_swflags = 0; /* XXX */ 441 sc->sc_fifolen = 16; 442 443 aprint_normal("\n"); 444 if (scifisconsole) { 445 aprint_naive(" (console)\n"); 446 aprint_normal_dev(self, "console\n"); 447 SET(sc->sc_hwflags, SCIF_HW_CONSOLE); 448 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 449 } 450 #ifdef KGDB 451 else if (kgdb_attached) { 452 aprint_naive(" (kgdb)\n"); 453 aprint_normal_dev(self, "kgdb\n"); 454 SET(sc->sc_hwflags, SCIF_HW_KGDB); 455 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 456 } 457 #endif 458 else { 459 aprint_naive("\n"); 460 InitializeScif(9600); /* XXX */ 461 } 462 463 callout_init(&sc->sc_diag_ch, 0); 464 #ifdef SH4 465 intc_intr_establish(SH4_INTEVT_SCIF_ERI, IST_LEVEL, IPL_SERIAL, 466 scifintr, sc); 467 intc_intr_establish(SH4_INTEVT_SCIF_RXI, IST_LEVEL, IPL_SERIAL, 468 scifintr, sc); 469 intc_intr_establish(SH4_INTEVT_SCIF_BRI, IST_LEVEL, IPL_SERIAL, 470 scifintr, sc); 471 intc_intr_establish(SH4_INTEVT_SCIF_TXI, IST_LEVEL, IPL_SERIAL, 472 scifintr, sc); 473 #else 474 intc_intr_establish(SH7709_INTEVT2_SCIF_ERI, IST_LEVEL, IPL_SERIAL, 475 scifintr, sc); 476 intc_intr_establish(SH7709_INTEVT2_SCIF_RXI, IST_LEVEL, IPL_SERIAL, 477 scifintr, sc); 478 intc_intr_establish(SH7709_INTEVT2_SCIF_BRI, IST_LEVEL, IPL_SERIAL, 479 scifintr, sc); 480 intc_intr_establish(SH7709_INTEVT2_SCIF_TXI, IST_LEVEL, IPL_SERIAL, 481 scifintr, sc); 482 #endif 483 484 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, scifsoft, sc); 485 SET(sc->sc_hwflags, SCIF_HW_DEV_OK); 486 487 tp = ttymalloc(); 488 tp->t_oproc = scifstart; 489 tp->t_param = scifparam; 490 tp->t_hwiflow = NULL; 491 492 sc->sc_tty = tp; 493 sc->sc_rbuf = malloc(scif_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 494 if (sc->sc_rbuf == NULL) { 495 aprint_error_dev(self, "unable to allocate ring buffer\n"); 496 return; 497 } 498 sc->sc_ebuf = sc->sc_rbuf + (scif_rbuf_size << 1); 499 500 tty_attach(tp); 501 } 502 503 /* 504 * Start or restart transmission. 505 */ 506 static void 507 scifstart(struct tty *tp) 508 { 509 struct scif_softc *sc = device_lookup(&scif_cd, SCIFUNIT(tp->t_dev)); 510 int s; 511 512 s = spltty(); 513 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 514 goto out; 515 if (sc->sc_tx_stopped) 516 goto out; 517 518 if (tp->t_outq.c_cc <= tp->t_lowat) { 519 if (ISSET(tp->t_state, TS_ASLEEP)) { 520 CLR(tp->t_state, TS_ASLEEP); 521 wakeup(&tp->t_outq); 522 } 523 selwakeup(&tp->t_wsel); 524 if (tp->t_outq.c_cc == 0) 525 goto out; 526 } 527 528 /* Grab the first contiguous region of buffer space. */ 529 { 530 u_char *tba; 531 int tbc; 532 533 tba = tp->t_outq.c_cf; 534 tbc = ndqb(&tp->t_outq, 0); 535 536 (void)splserial(); 537 538 sc->sc_tba = tba; 539 sc->sc_tbc = tbc; 540 } 541 542 SET(tp->t_state, TS_BUSY); 543 sc->sc_tx_busy = 1; 544 545 /* Enable transmit completion interrupts if necessary. */ 546 scif_scr_write(scif_scr_read() | SCSCR2_TIE | SCSCR2_RIE); 547 548 /* Output the first chunk of the contiguous buffer. */ 549 { 550 int n; 551 int maxchars; 552 int i; 553 554 n = sc->sc_tbc; 555 maxchars = sc->sc_fifolen 556 - ((scif_fdr_read() & SCFDR2_TXCNT) >> 8); 557 if (n > maxchars) 558 n = maxchars; 559 560 for (i = 0; i < n; i++) { 561 scif_putc(*(sc->sc_tba)); 562 sc->sc_tba++; 563 } 564 sc->sc_tbc -= n; 565 } 566 out: 567 splx(s); 568 return; 569 } 570 571 /* 572 * Set SCIF tty parameters from termios. 573 * XXX - Should just copy the whole termios after 574 * making sure all the changes could be done. 575 */ 576 static int 577 scifparam(struct tty *tp, struct termios *t) 578 { 579 struct scif_softc *sc = device_lookup(&scif_cd, SCIFUNIT(tp->t_dev)); 580 int ospeed = t->c_ospeed; 581 int s; 582 583 if (!device_is_active(&sc->sc_dev)) 584 return (EIO); 585 586 /* Check requested parameters. */ 587 if (ospeed < 0) 588 return (EINVAL); 589 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 590 return (EINVAL); 591 592 /* 593 * For the console, always force CLOCAL and !HUPCL, so that the port 594 * is always active. 595 */ 596 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 597 ISSET(sc->sc_hwflags, SCIF_HW_CONSOLE)) { 598 SET(t->c_cflag, CLOCAL); 599 CLR(t->c_cflag, HUPCL); 600 } 601 602 /* 603 * If there were no changes, don't do anything. This avoids dropping 604 * input and improves performance when all we did was frob things like 605 * VMIN and VTIME. 606 */ 607 if (tp->t_ospeed == t->c_ospeed && 608 tp->t_cflag == t->c_cflag) 609 return (0); 610 611 #if 0 612 /* XXX (msaitoh) */ 613 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 614 #endif 615 616 s = splserial(); 617 618 /* 619 * Set the flow control pins depending on the current flow control 620 * mode. 621 */ 622 if (ISSET(t->c_cflag, CRTSCTS)) { 623 scif_fcr_write(scif_fcr_read() | SCFCR2_MCE); 624 } else { 625 scif_fcr_write(scif_fcr_read() & ~SCFCR2_MCE); 626 } 627 628 scif_brr_write(divrnd(sh_clock_get_pclock(), 32 * ospeed) -1); 629 630 /* 631 * Set the FIFO threshold based on the receive speed. 632 * 633 * * If it's a low speed, it's probably a mouse or some other 634 * interactive device, so set the threshold low. 635 * * If it's a high speed, trim the trigger level down to prevent 636 * overflows. 637 * * Otherwise set it a bit higher. 638 */ 639 #if 0 640 /* XXX (msaitoh) */ 641 if (ISSET(sc->sc_hwflags, SCIF_HW_HAYESP)) 642 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 643 else if (ISSET(sc->sc_hwflags, SCIF_HW_FIFO)) 644 sc->sc_fifo = FIFO_ENABLE | 645 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 646 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 647 else 648 sc->sc_fifo = 0; 649 #endif 650 651 /* And copy to tty. */ 652 tp->t_ispeed = 0; 653 tp->t_ospeed = t->c_ospeed; 654 tp->t_cflag = t->c_cflag; 655 656 if (!sc->sc_heldchange) { 657 if (sc->sc_tx_busy) { 658 sc->sc_heldtbc = sc->sc_tbc; 659 sc->sc_tbc = 0; 660 sc->sc_heldchange = 1; 661 } 662 #if 0 663 /* XXX (msaitoh) */ 664 else 665 scif_loadchannelregs(sc); 666 #endif 667 } 668 669 if (!ISSET(t->c_cflag, CHWFLOW)) { 670 /* Disable the high water mark. */ 671 sc->sc_r_hiwat = 0; 672 sc->sc_r_lowat = 0; 673 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 674 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 675 scif_schedrx(sc); 676 } 677 } else { 678 sc->sc_r_hiwat = scif_rbuf_hiwat; 679 sc->sc_r_lowat = scif_rbuf_lowat; 680 } 681 682 splx(s); 683 684 #ifdef SCIF_DEBUG 685 if (scif_debug) 686 scifstatus(sc, "scifparam "); 687 #endif 688 689 if (!ISSET(t->c_cflag, CHWFLOW)) { 690 if (sc->sc_tx_stopped) { 691 sc->sc_tx_stopped = 0; 692 scifstart(tp); 693 } 694 } 695 696 return (0); 697 } 698 699 static void 700 scif_iflush(struct scif_softc *sc) 701 { 702 int i; 703 unsigned char c; 704 705 i = scif_fdr_read() & SCFDR2_RECVCNT; 706 707 while (i > 0) { 708 c = scif_frdr_read(); 709 scif_ssr_write(scif_ssr_read() & ~(SCSSR2_RDF | SCSSR2_DR)); 710 i--; 711 } 712 } 713 714 int 715 scifopen(dev_t dev, int flag, int mode, struct lwp *l) 716 { 717 struct scif_softc *sc; 718 struct tty *tp; 719 int s, s2; 720 int error; 721 722 sc = device_lookup(&scif_cd, SCIFUNIT(dev)); 723 if (sc == 0 || !ISSET(sc->sc_hwflags, SCIF_HW_DEV_OK) || 724 sc->sc_rbuf == NULL) 725 return (ENXIO); 726 727 if (!device_is_active(&sc->sc_dev)) 728 return (ENXIO); 729 730 #ifdef KGDB 731 /* 732 * If this is the kgdb port, no other use is permitted. 733 */ 734 if (ISSET(sc->sc_hwflags, SCIF_HW_KGDB)) 735 return (EBUSY); 736 #endif /* KGDB */ 737 738 tp = sc->sc_tty; 739 740 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 741 return (EBUSY); 742 743 s = spltty(); 744 745 /* 746 * Do the following iff this is a first open. 747 */ 748 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 749 struct termios t; 750 751 tp->t_dev = dev; 752 753 s2 = splserial(); 754 755 /* Turn on interrupts. */ 756 scif_scr_write(scif_scr_read() | SCSCR2_TIE | SCSCR2_RIE); 757 758 splx(s2); 759 760 /* 761 * Initialize the termios status to the defaults. Add in the 762 * sticky bits from TIOCSFLAGS. 763 */ 764 t.c_ispeed = 0; 765 if (ISSET(sc->sc_hwflags, SCIF_HW_CONSOLE)) { 766 t.c_ospeed = scifcn_speed; /* XXX (msaitoh) */ 767 t.c_cflag = scifconscflag; 768 } else { 769 t.c_ospeed = TTYDEF_SPEED; 770 t.c_cflag = TTYDEF_CFLAG; 771 } 772 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 773 SET(t.c_cflag, CLOCAL); 774 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 775 SET(t.c_cflag, CRTSCTS); 776 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 777 SET(t.c_cflag, MDMBUF); 778 /* Make sure scifparam() will do something. */ 779 tp->t_ospeed = 0; 780 (void) scifparam(tp, &t); 781 tp->t_iflag = TTYDEF_IFLAG; 782 tp->t_oflag = TTYDEF_OFLAG; 783 tp->t_lflag = TTYDEF_LFLAG; 784 ttychars(tp); 785 ttsetwater(tp); 786 787 s2 = splserial(); 788 789 /* Clear the input ring, and unblock. */ 790 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 791 sc->sc_rbavail = scif_rbuf_size; 792 scif_iflush(sc); 793 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 794 #if 0 795 /* XXX (msaitoh) */ 796 scif_hwiflow(sc); 797 #endif 798 799 #ifdef SCIF_DEBUG 800 if (scif_debug) 801 scifstatus(sc, "scifopen "); 802 #endif 803 804 splx(s2); 805 } 806 807 splx(s); 808 809 error = ttyopen(tp, SCIFDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 810 if (error) 811 goto bad; 812 813 error = (*tp->t_linesw->l_open)(dev, tp); 814 if (error) 815 goto bad; 816 817 return (0); 818 819 bad: 820 821 return (error); 822 } 823 824 int 825 scifclose(dev_t dev, int flag, int mode, struct lwp *l) 826 { 827 struct scif_softc *sc = device_lookup(&scif_cd, SCIFUNIT(dev)); 828 struct tty *tp = sc->sc_tty; 829 830 /* XXX This is for cons.c. */ 831 if (!ISSET(tp->t_state, TS_ISOPEN)) 832 return (0); 833 834 (*tp->t_linesw->l_close)(tp, flag); 835 ttyclose(tp); 836 837 if (!device_is_active(&sc->sc_dev)) 838 return (0); 839 840 return (0); 841 } 842 843 int 844 scifread(dev_t dev, struct uio *uio, int flag) 845 { 846 struct scif_softc *sc = device_lookup(&scif_cd, SCIFUNIT(dev)); 847 struct tty *tp = sc->sc_tty; 848 849 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 850 } 851 852 int 853 scifwrite(dev_t dev, struct uio *uio, int flag) 854 { 855 struct scif_softc *sc = device_lookup(&scif_cd, SCIFUNIT(dev)); 856 struct tty *tp = sc->sc_tty; 857 858 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 859 } 860 861 int 862 scifpoll(dev_t dev, int events, struct lwp *l) 863 { 864 struct scif_softc *sc = device_lookup(&scif_cd, SCIFUNIT(dev)); 865 struct tty *tp = sc->sc_tty; 866 867 return ((*tp->t_linesw->l_poll)(tp, events, l)); 868 } 869 870 struct tty * 871 sciftty(dev_t dev) 872 { 873 struct scif_softc *sc = device_lookup(&scif_cd, SCIFUNIT(dev)); 874 struct tty *tp = sc->sc_tty; 875 876 return (tp); 877 } 878 879 int 880 scifioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 881 { 882 struct scif_softc *sc = device_lookup(&scif_cd, SCIFUNIT(dev)); 883 struct tty *tp = sc->sc_tty; 884 int error; 885 int s; 886 887 if (!device_is_active(&sc->sc_dev)) 888 return (EIO); 889 890 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 891 if (error != EPASSTHROUGH) 892 return (error); 893 894 error = ttioctl(tp, cmd, data, flag, l); 895 if (error != EPASSTHROUGH) 896 return (error); 897 898 error = 0; 899 900 s = splserial(); 901 902 switch (cmd) { 903 case TIOCSBRK: 904 scif_break(sc, 1); 905 break; 906 907 case TIOCCBRK: 908 scif_break(sc, 0); 909 break; 910 911 case TIOCGFLAGS: 912 *(int *)data = sc->sc_swflags; 913 break; 914 915 case TIOCSFLAGS: 916 error = kauth_authorize_device_tty(l->l_cred, 917 KAUTH_DEVICE_TTY_PRIVSET, tp); 918 if (error) 919 break; 920 sc->sc_swflags = *(int *)data; 921 break; 922 923 default: 924 error = EPASSTHROUGH; 925 break; 926 } 927 928 splx(s); 929 930 return (error); 931 } 932 933 static void 934 scif_schedrx(struct scif_softc *sc) 935 { 936 937 sc->sc_rx_ready = 1; 938 939 /* Wake up the poller. */ 940 softintr_schedule(sc->sc_si); 941 } 942 943 static void 944 scif_break(struct scif_softc *sc, int onoff) 945 { 946 947 if (onoff) 948 scif_ssr_write(scif_ssr_read() & ~SCSSR2_TDFE); 949 else 950 scif_ssr_write(scif_ssr_read() | SCSSR2_TDFE); 951 952 #if 0 /* XXX */ 953 if (!sc->sc_heldchange) { 954 if (sc->sc_tx_busy) { 955 sc->sc_heldtbc = sc->sc_tbc; 956 sc->sc_tbc = 0; 957 sc->sc_heldchange = 1; 958 } else 959 scif_loadchannelregs(sc); 960 } 961 #endif 962 } 963 964 /* 965 * Stop output, e.g., for ^S or output flush. 966 */ 967 void 968 scifstop(struct tty *tp, int flag) 969 { 970 struct scif_softc *sc = device_lookup(&scif_cd, SCIFUNIT(tp->t_dev)); 971 int s; 972 973 s = splserial(); 974 if (ISSET(tp->t_state, TS_BUSY)) { 975 /* Stop transmitting at the next chunk. */ 976 sc->sc_tbc = 0; 977 sc->sc_heldtbc = 0; 978 if (!ISSET(tp->t_state, TS_TTSTOP)) 979 SET(tp->t_state, TS_FLUSH); 980 } 981 splx(s); 982 } 983 984 static void 985 scifdiag(void *arg) 986 { 987 struct scif_softc *sc = arg; 988 int overflows, floods; 989 int s; 990 991 s = splserial(); 992 overflows = sc->sc_overflows; 993 sc->sc_overflows = 0; 994 floods = sc->sc_floods; 995 sc->sc_floods = 0; 996 sc->sc_errors = 0; 997 splx(s); 998 999 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 1000 device_xname(&sc->sc_dev), 1001 overflows, overflows == 1 ? "" : "s", 1002 floods, floods == 1 ? "" : "s"); 1003 } 1004 1005 static void 1006 scif_rxsoft(struct scif_softc *sc, struct tty *tp) 1007 { 1008 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1009 u_char *get, *end; 1010 u_int cc, scc; 1011 u_char ssr2; 1012 int code; 1013 int s; 1014 1015 end = sc->sc_ebuf; 1016 get = sc->sc_rbget; 1017 scc = cc = scif_rbuf_size - sc->sc_rbavail; 1018 1019 if (cc == scif_rbuf_size) { 1020 sc->sc_floods++; 1021 if (sc->sc_errors++ == 0) 1022 callout_reset(&sc->sc_diag_ch, 60 * hz, scifdiag, sc); 1023 } 1024 1025 while (cc) { 1026 code = get[0]; 1027 ssr2 = get[1]; 1028 if (ISSET(ssr2, SCSSR2_BRK | SCSSR2_FER | SCSSR2_PER)) { 1029 if (ISSET(ssr2, SCSSR2_BRK | SCSSR2_FER)) 1030 SET(code, TTY_FE); 1031 if (ISSET(ssr2, SCSSR2_PER)) 1032 SET(code, TTY_PE); 1033 } 1034 if ((*rint)(code, tp) == -1) { 1035 /* 1036 * The line discipline's buffer is out of space. 1037 */ 1038 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1039 /* 1040 * We're either not using flow control, or the 1041 * line discipline didn't tell us to block for 1042 * some reason. Either way, we have no way to 1043 * know when there's more space available, so 1044 * just drop the rest of the data. 1045 */ 1046 get += cc << 1; 1047 if (get >= end) 1048 get -= scif_rbuf_size << 1; 1049 cc = 0; 1050 } else { 1051 /* 1052 * Don't schedule any more receive processing 1053 * until the line discipline tells us there's 1054 * space available (through scifhwiflow()). 1055 * Leave the rest of the data in the input 1056 * buffer. 1057 */ 1058 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1059 } 1060 break; 1061 } 1062 get += 2; 1063 if (get >= end) 1064 get = sc->sc_rbuf; 1065 cc--; 1066 } 1067 1068 if (cc != scc) { 1069 sc->sc_rbget = get; 1070 s = splserial(); 1071 cc = sc->sc_rbavail += scc - cc; 1072 /* Buffers should be ok again, release possible block. */ 1073 if (cc >= sc->sc_r_lowat) { 1074 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1075 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1076 scif_scr_write(scif_scr_read() | SCSCR2_RIE); 1077 } 1078 #if 0 1079 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1080 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1081 scif_hwiflow(sc); 1082 } 1083 #endif 1084 } 1085 splx(s); 1086 } 1087 } 1088 1089 static void 1090 scif_txsoft(struct scif_softc *sc, struct tty *tp) 1091 { 1092 1093 CLR(tp->t_state, TS_BUSY); 1094 if (ISSET(tp->t_state, TS_FLUSH)) 1095 CLR(tp->t_state, TS_FLUSH); 1096 else 1097 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1098 (*tp->t_linesw->l_start)(tp); 1099 } 1100 1101 #if 0 /* XXX (msaitoh) */ 1102 static void 1103 scif_stsoft(struct scif_softc *sc, struct tty *tp) 1104 { 1105 u_char msr, delta; 1106 int s; 1107 1108 s = splserial(); 1109 msr = sc->sc_msr; 1110 delta = sc->sc_msr_delta; 1111 sc->sc_msr_delta = 0; 1112 splx(s); 1113 1114 if (ISSET(delta, sc->sc_msr_dcd)) { 1115 /* 1116 * Inform the tty layer that carrier detect changed. 1117 */ 1118 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_DCD)); 1119 } 1120 1121 if (ISSET(delta, sc->sc_msr_cts)) { 1122 /* Block or unblock output according to flow control. */ 1123 if (ISSET(msr, sc->sc_msr_cts)) { 1124 sc->sc_tx_stopped = 0; 1125 (*tp->t_linesw->l_start)(tp); 1126 } else { 1127 sc->sc_tx_stopped = 1; 1128 } 1129 } 1130 1131 #ifdef SCIF_DEBUG 1132 if (scif_debug) 1133 scifstatus(sc, "scif_stsoft"); 1134 #endif 1135 } 1136 #endif /* 0 */ 1137 1138 static void 1139 scifsoft(void *arg) 1140 { 1141 struct scif_softc *sc = arg; 1142 struct tty *tp; 1143 1144 if (!device_is_active(&sc->sc_dev)) 1145 return; 1146 1147 tp = sc->sc_tty; 1148 1149 if (sc->sc_rx_ready) { 1150 sc->sc_rx_ready = 0; 1151 scif_rxsoft(sc, tp); 1152 } 1153 1154 #if 0 1155 if (sc->sc_st_check) { 1156 sc->sc_st_check = 0; 1157 scif_stsoft(sc, tp); 1158 } 1159 #endif 1160 1161 if (sc->sc_tx_done) { 1162 sc->sc_tx_done = 0; 1163 scif_txsoft(sc, tp); 1164 } 1165 } 1166 1167 static int 1168 scifintr(void *arg) 1169 { 1170 struct scif_softc *sc = arg; 1171 u_char *put, *end; 1172 u_int cc; 1173 u_short ssr2; 1174 int count; 1175 1176 if (!device_is_active(&sc->sc_dev)) 1177 return (0); 1178 1179 end = sc->sc_ebuf; 1180 put = sc->sc_rbput; 1181 cc = sc->sc_rbavail; 1182 1183 do { 1184 ssr2 = scif_ssr_read(); 1185 if (ISSET(ssr2, SCSSR2_BRK)) { 1186 scif_ssr_write(scif_ssr_read() 1187 & ~(SCSSR2_ER | SCSSR2_BRK | SCSSR2_DR)); 1188 #ifdef DDB 1189 if (ISSET(sc->sc_hwflags, SCIF_HW_CONSOLE)) { 1190 console_debugger(); 1191 } 1192 #endif /* DDB */ 1193 #ifdef KGDB 1194 if (ISSET(sc->sc_hwflags, SCIF_HW_KGDB)) { 1195 kgdb_connect(1); 1196 } 1197 #endif /* KGDB */ 1198 } 1199 count = scif_fdr_read() & SCFDR2_RECVCNT; 1200 if (count != 0) { 1201 for (;;) { 1202 u_char c = scif_frdr_read(); 1203 u_char err = (u_char)(scif_ssr_read() & 0x00ff); 1204 1205 scif_ssr_write(scif_ssr_read() 1206 & ~(SCSSR2_ER | SCSSR2_RDF | SCSSR2_DR)); 1207 #ifdef SH4 1208 if (CPU_IS_SH4) 1209 scif_lsr_write(scif_lsr_read() 1210 & ~SCLSR2_ORER); 1211 #endif 1212 if ((cc > 0) && (count > 0)) { 1213 put[0] = c; 1214 put[1] = err; 1215 put += 2; 1216 if (put >= end) 1217 put = sc->sc_rbuf; 1218 cc--; 1219 count--; 1220 } else 1221 break; 1222 } 1223 1224 /* 1225 * Current string of incoming characters ended because 1226 * no more data was available or we ran out of space. 1227 * Schedule a receive event if any data was received. 1228 * If we're out of space, turn off receive interrupts. 1229 */ 1230 sc->sc_rbput = put; 1231 sc->sc_rbavail = cc; 1232 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1233 sc->sc_rx_ready = 1; 1234 1235 /* 1236 * See if we are in danger of overflowing a buffer. If 1237 * so, use hardware flow control to ease the pressure. 1238 */ 1239 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1240 cc < sc->sc_r_hiwat) { 1241 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1242 #if 0 1243 scif_hwiflow(sc); 1244 #endif 1245 } 1246 1247 /* 1248 * If we're out of space, disable receive interrupts 1249 * until the queue has drained a bit. 1250 */ 1251 if (!cc) { 1252 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1253 scif_scr_write(scif_scr_read() & ~SCSCR2_RIE); 1254 } 1255 } else { 1256 if (scif_ssr_read() & (SCSSR2_RDF | SCSSR2_DR)) { 1257 scif_scr_write(scif_scr_read() 1258 & ~(SCSCR2_TIE | SCSCR2_RIE)); 1259 delay(10); 1260 scif_scr_write(scif_scr_read() 1261 | SCSCR2_TIE | SCSCR2_RIE); 1262 continue; 1263 } 1264 } 1265 } while (scif_ssr_read() & (SCSSR2_RDF | SCSSR2_DR)); 1266 1267 #if 0 1268 msr = bus_space_read_1(iot, ioh, scif_msr); 1269 delta = msr ^ sc->sc_msr; 1270 sc->sc_msr = msr; 1271 if (ISSET(delta, sc->sc_msr_mask)) { 1272 SET(sc->sc_msr_delta, delta); 1273 1274 /* 1275 * Pulse-per-second clock signal on edge of DCD? 1276 */ 1277 if (ISSET(delta, sc->sc_ppsmask)) { 1278 struct timeval tv; 1279 if (ISSET(msr, sc->sc_ppsmask) == 1280 sc->sc_ppsassert) { 1281 /* XXX nanotime() */ 1282 microtime(&tv); 1283 TIMEVAL_TO_TIMESPEC(&tv, 1284 &sc->ppsinfo.assert_timestamp); 1285 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1286 timespecadd(&sc->ppsinfo.assert_timestamp, 1287 &sc->ppsparam.assert_offset, 1288 &sc->ppsinfo.assert_timestamp); 1289 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 1290 } 1291 1292 #ifdef PPS_SYNC 1293 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1294 hardpps(&tv, tv.tv_usec); 1295 #endif 1296 sc->ppsinfo.assert_sequence++; 1297 sc->ppsinfo.current_mode = 1298 sc->ppsparam.mode; 1299 1300 } else if (ISSET(msr, sc->sc_ppsmask) == 1301 sc->sc_ppsclear) { 1302 /* XXX nanotime() */ 1303 microtime(&tv); 1304 TIMEVAL_TO_TIMESPEC(&tv, 1305 &sc->ppsinfo.clear_timestamp); 1306 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1307 timespecadd(&sc->ppsinfo.clear_timestamp, 1308 &sc->ppsparam.clear_offset, 1309 &sc->ppsinfo.clear_timestamp); 1310 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 1311 } 1312 1313 #ifdef PPS_SYNC 1314 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1315 hardpps(&tv, tv.tv_usec); 1316 #endif 1317 sc->ppsinfo.clear_sequence++; 1318 sc->ppsinfo.current_mode = 1319 sc->ppsparam.mode; 1320 } 1321 } 1322 1323 /* 1324 * Stop output immediately if we lose the output 1325 * flow control signal or carrier detect. 1326 */ 1327 if (ISSET(~msr, sc->sc_msr_mask)) { 1328 sc->sc_tbc = 0; 1329 sc->sc_heldtbc = 0; 1330 #ifdef SCIF_DEBUG 1331 if (scif_debug) 1332 scifstatus(sc, "scifintr "); 1333 #endif 1334 } 1335 1336 sc->sc_st_check = 1; 1337 } 1338 #endif 1339 1340 /* 1341 * Done handling any receive interrupts. See if data can be 1342 * transmitted as well. Schedule tx done event if no data left 1343 * and tty was marked busy. 1344 */ 1345 if (((scif_fdr_read() & SCFDR2_TXCNT) >> 8) != 16) { /* XXX (msaitoh) */ 1346 /* 1347 * If we've delayed a parameter change, do it now, and restart 1348 * output. 1349 */ 1350 if (sc->sc_heldchange) { 1351 sc->sc_heldchange = 0; 1352 sc->sc_tbc = sc->sc_heldtbc; 1353 sc->sc_heldtbc = 0; 1354 } 1355 1356 /* Output the next chunk of the contiguous buffer, if any. */ 1357 if (sc->sc_tbc > 0) { 1358 int n; 1359 int maxchars; 1360 int i; 1361 1362 n = sc->sc_tbc; 1363 maxchars = sc->sc_fifolen - 1364 ((scif_fdr_read() & SCFDR2_TXCNT) >> 8); 1365 if (n > maxchars) 1366 n = maxchars; 1367 1368 for (i = 0; i < n; i++) { 1369 scif_putc(*(sc->sc_tba)); 1370 sc->sc_tba++; 1371 } 1372 sc->sc_tbc -= n; 1373 } else { 1374 /* Disable transmit completion interrupts if necessary. */ 1375 #if 0 1376 if (ISSET(sc->sc_ier, IER_ETXRDY)) 1377 #endif 1378 scif_scr_write(scif_scr_read() & ~SCSCR2_TIE); 1379 1380 if (sc->sc_tx_busy) { 1381 sc->sc_tx_busy = 0; 1382 sc->sc_tx_done = 1; 1383 } 1384 } 1385 } 1386 1387 /* Wake up the poller. */ 1388 softintr_schedule(sc->sc_si); 1389 1390 #if NRND > 0 && defined(RND_SCIF) 1391 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1392 #endif 1393 1394 return (1); 1395 } 1396 1397 void 1398 scifcnprobe(struct consdev *cp) 1399 { 1400 int maj; 1401 1402 /* locate the major number */ 1403 maj = cdevsw_lookup_major(&scif_cdevsw); 1404 1405 /* Initialize required fields. */ 1406 cp->cn_dev = makedev(maj, 0); 1407 #ifdef SCIFCONSOLE 1408 cp->cn_pri = CN_REMOTE; 1409 #else 1410 cp->cn_pri = CN_NORMAL; 1411 #endif 1412 } 1413 1414 void 1415 scifcninit(struct consdev *cp) 1416 { 1417 1418 InitializeScif(scifcn_speed); 1419 scifisconsole = 1; 1420 } 1421 1422 int 1423 scifcngetc(dev_t dev) 1424 { 1425 int c; 1426 int s; 1427 1428 s = splserial(); 1429 c = scif_getc(); 1430 splx(s); 1431 1432 return (c); 1433 } 1434 1435 void 1436 scifcnputc(dev_t dev, int c) 1437 { 1438 int s; 1439 1440 s = splserial(); 1441 scif_putc((u_char)c); 1442 splx(s); 1443 } 1444 1445 #ifdef KGDB 1446 int 1447 scif_kgdb_init() 1448 { 1449 1450 if (strcmp(kgdb_devname, "scif") != 0) 1451 return (1); 1452 1453 if (scifisconsole) 1454 return (1); /* can't share with console */ 1455 1456 InitializeScif(kgdb_rate); 1457 1458 kgdb_attach((int (*)(void *))scifcngetc, 1459 (void (*)(void *, int))scifcnputc, NULL); 1460 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 1461 kgdb_attached = 1; 1462 1463 return (0); 1464 } 1465 #endif /* KGDB */ 1466
Indexes created Tue Sep 23 02:09:52 GMT 2025