sbscn.c revision 1.6
1 /* $NetBSD: sbscn.c,v 1.6 2002/11/10 11:06:11 simonb Exp $ */ 2 3 /* 4 * Copyright 2000, 2001 5 * Broadcom Corporation. All rights reserved. 6 * 7 * This software is furnished under license and may be used and copied only 8 * in accordance with the following terms and conditions. Subject to these 9 * conditions, you may download, copy, install, use, modify and distribute 10 * modified or unmodified copies of this software in source and/or binary 11 * form. No title or ownership is transferred hereby. 12 * 13 * 1) Any source code used, modified or distributed must reproduce and 14 * retain this copyright notice and list of conditions as they appear in 15 * the source file. 16 * 17 * 2) No right is granted to use any trade name, trademark, or logo of 18 * Broadcom Corporation. Neither the "Broadcom Corporation" name nor any 19 * trademark or logo of Broadcom Corporation may be used to endorse or 20 * promote products derived from this software without the prior written 21 * permission of Broadcom Corporation. 22 * 23 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR 26 * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE 27 * FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE 28 * LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 31 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 33 * OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #define SBSCN_DEBUG 37 38 /* from: $NetBSD: com.c,v 1.172 2000/05/03 19:19:04 thorpej Exp */ 39 40 /*- 41 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 42 * All rights reserved. 43 * 44 * This code is derived from software contributed to The NetBSD Foundation 45 * by Charles M. Hannum. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. All advertising materials mentioning features or use of this software 56 * must display the following acknowledgement: 57 * This product includes software developed by the NetBSD 58 * Foundation, Inc. and its contributors. 59 * 4. Neither the name of The NetBSD Foundation nor the names of its 60 * contributors may be used to endorse or promote products derived 61 * from this software without specific prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 64 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 65 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 66 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 67 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 68 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 69 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 70 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 71 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 72 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 73 * POSSIBILITY OF SUCH DAMAGE. 74 */ 75 76 /* 77 * Copyright (c) 1991 The Regents of the University of California. 78 * All rights reserved. 79 * 80 * Redistribution and use in source and binary forms, with or without 81 * modification, are permitted provided that the following conditions 82 * are met: 83 * 1. Redistributions of source code must retain the above copyright 84 * notice, this list of conditions and the following disclaimer. 85 * 2. Redistributions in binary form must reproduce the above copyright 86 * notice, this list of conditions and the following disclaimer in the 87 * documentation and/or other materials provided with the distribution. 88 * 3. All advertising materials mentioning features or use of this software 89 * must display the following acknowledgement: 90 * This product includes software developed by the University of 91 * California, Berkeley and its contributors. 92 * 4. Neither the name of the University nor the names of its contributors 93 * may be used to endorse or promote products derived from this software 94 * without specific prior written permission. 95 * 96 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 97 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 98 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 99 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 100 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 101 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 102 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 103 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 104 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 105 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 106 * SUCH DAMAGE. 107 * 108 * @(#)com.c 7.5 (Berkeley) 5/16/91 109 */ 110 111 /* 112 * `sbscn' driver, supports SiByte SB-1250 SOC DUART. 113 * 114 * This DUART is quite similar in programming model to the scn2681/68681 115 * DUARTs supported by the NetBSD/amiga `mfc' and NetBSD/pc532 `scn' 116 * driver, but substantial rework would have been necessary to make 117 * those drivers sane w.r.t. bus_space (which would then have been 118 * required on NetBSD/sbmips very early on), and to accommodate the 119 * different register mappings. 120 * 121 * So, another driver. Eventually there should be One True Driver, 122 * but we're not here to save the world. 123 */ 124 125 #include "opt_ddb.h" 126 127 #include "rnd.h" 128 #if NRND > 0 && defined(RND_SBSCN) 129 #include <sys/rnd.h> 130 #endif 131 132 #include <sys/param.h> 133 #include <sys/systm.h> 134 #include <sys/ioctl.h> 135 #include <sys/select.h> 136 #include <sys/tty.h> 137 #include <sys/proc.h> 138 #include <sys/user.h> 139 #include <sys/conf.h> 140 #include <sys/file.h> 141 #include <sys/uio.h> 142 #include <sys/kernel.h> 143 #include <sys/syslog.h> 144 #include <sys/types.h> 145 #include <sys/device.h> 146 #include <sys/malloc.h> 147 #include <sys/vnode.h> 148 149 #include <mips/sibyte/dev/sbobiovar.h> 150 #if 0 151 #include <mips/sibyte/dev/sbscnreg.h> 152 #endif 153 #include <mips/sibyte/dev/sbscnvar.h> 154 #include <dev/cons.h> 155 #include <machine/locore.h> 156 157 void sbscn_attach_channel(struct sbscn_softc *sc, int chan, int intr); 158 #if defined(DDB) || defined(KGDB) 159 static void sbscn_enable_debugport(struct sbscn_channel *ch); 160 #endif 161 void sbscn_config(struct sbscn_channel *ch); 162 void sbscn_shutdown(struct sbscn_channel *ch); 163 int sbscn_speed(long, long *); 164 static int cflag2modes(tcflag_t, u_char *, u_char *); 165 int sbscn_param(struct tty *, struct termios *); 166 void sbscn_start(struct tty *); 167 int sbscn_hwiflow(struct tty *, int); 168 169 void sbscn_loadchannelregs(struct sbscn_channel *); 170 void sbscn_dohwiflow(struct sbscn_channel *); 171 void sbscn_break(struct sbscn_channel *, int); 172 void sbscn_modem(struct sbscn_channel *, int); 173 void tiocm_to_sbscn(struct sbscn_channel *, int, int); 174 int sbscn_to_tiocm(struct sbscn_channel *); 175 void sbscn_iflush(struct sbscn_channel *); 176 177 int sbscn_init(u_long addr, int chan, int rate, tcflag_t cflag); 178 int sbscn_common_getc(u_long addr, int chan); 179 void sbscn_common_putc(u_long addr, int chan, int c); 180 void sbscn_intr(void *arg, uint32_t status, uint32_t pc); 181 182 int sbscn_cngetc(dev_t dev); 183 void sbscn_cnputc(dev_t dev, int c); 184 void sbscn_cnpollc(dev_t dev, int on); 185 186 extern struct cfdriver sbscn_cd; 187 188 dev_type_open(sbscnopen); 189 dev_type_close(sbscnclose); 190 dev_type_read(sbscnread); 191 dev_type_write(sbscnwrite); 192 dev_type_ioctl(sbscnioctl); 193 dev_type_stop(sbscnstop); 194 dev_type_tty(sbscntty); 195 dev_type_poll(sbscnpoll); 196 197 const struct cdevsw sbscn_cdevsw = { 198 sbscnopen, sbscnclose, sbscnread, sbscnwrite, sbscnioctl, 199 sbscnstop, sbscntty, sbscnpoll, nommap, ttykqfilter, D_TTY 200 }; 201 202 #define integrate static inline 203 void sbscn_soft(void *); 204 integrate void sbscn_rxsoft(struct sbscn_channel *, struct tty *); 205 integrate void sbscn_txsoft(struct sbscn_channel *, struct tty *); 206 integrate void sbscn_stsoft(struct sbscn_channel *, struct tty *); 207 integrate void sbscn_schedrx(struct sbscn_channel *); 208 void sbscn_diag(void *); 209 210 /* 211 * Make this an option variable one can patch. 212 * But be warned: this must be a power of 2! 213 */ 214 u_int sbscn_rbuf_size = SBSCN_RING_SIZE; 215 216 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 217 u_int sbscn_rbuf_hiwat = (SBSCN_RING_SIZE * 1) / 4; 218 u_int sbscn_rbuf_lowat = (SBSCN_RING_SIZE * 3) / 4; 219 220 static int sbscn_cons_present; 221 static int sbscn_cons_attached; 222 static u_long sbscn_cons_addr; 223 static int sbscn_cons_chan; 224 static int sbscn_cons_rate; 225 static tcflag_t sbscn_cons_cflag; 226 227 #ifdef KGDB 228 #include <sys/kgdb.h> 229 230 static int sbscn_kgdb_present; 231 static int sbscn_kgdb_attached; 232 static u_long sbscn_kgdb_addr; 233 static int sbscn_kgdb_chan; 234 235 int sbscn_kgdb_getc(void *); 236 void sbscn_kgdb_putc(void *, int); 237 #endif /* KGDB */ 238 239 static int sbscn_match(struct device *, struct cfdata *, void *); 240 static void sbscn_attach(struct device *, struct device *, void *); 241 242 CFATTACH_DECL(sbscn, sizeof(struct sbscn_softc), 243 sbscn_match, sbscn_attach, NULL, NULL); 244 245 #define READ_REG(rp) (mips3_ld((uint64_t *)(rp))) 246 #define WRITE_REG(rp, val) (mips3_sd((uint64_t *)(rp), (val))) 247 248 /* 249 * input and output signals are actually the _inverse_ of the bits in the 250 * input and output port registers! 251 */ 252 #define GET_INPUT_SIGNALS(ch) \ 253 ((~READ_REG(MIPS_PHYS_TO_KSEG1((ch)->ch_sc->sc_addr + 0x280))) & (ch)->ch_i_mask) 254 #define SET_OUTPUT_SIGNALS(ch, val) \ 255 do { \ 256 int sigs_to_set, sigs_to_clr; \ 257 \ 258 sigs_to_set = (ch)->ch_o_mask & val; \ 259 sigs_to_clr = (ch)->ch_o_mask & ~val; \ 260 \ 261 /* set signals by clearing op bits, and vice versa */ \ 262 WRITE_REG(MIPS_PHYS_TO_KSEG1((ch)->ch_sc->sc_addr + 0x2c0), \ 263 sigs_to_set); \ 264 WRITE_REG(MIPS_PHYS_TO_KSEG1((ch)->ch_sc->sc_addr + 0x2b0), \ 265 sigs_to_clr); \ 266 } while (0) 267 268 static int 269 sbscn_match(struct device *parent, struct cfdata *match, void *aux) 270 { 271 struct sbobio_attach_args *sap = aux; 272 273 if (sap->sa_locs.sa_type != SBOBIO_DEVTYPE_DUART) 274 return (0); 275 276 return 1; 277 } 278 279 static void 280 sbscn_attach(struct device *parent, struct device *self, void *aux) 281 { 282 struct sbscn_softc *sc = (struct sbscn_softc *)self; 283 struct sbobio_attach_args *sap = aux; 284 int i; 285 286 sc->sc_addr = sap->sa_base + sap->sa_locs.sa_offset; 287 288 printf("\n"); 289 for (i = 0; i < 2; i++) 290 sbscn_attach_channel(sc, i, sap->sa_locs.sa_intr[i]); 291 292 /* init duart_opcr */ 293 WRITE_REG(MIPS_PHYS_TO_KSEG1(sc->sc_addr + 0x270), 0); 294 /* init duart_aux_ctrl */ 295 WRITE_REG(MIPS_PHYS_TO_KSEG1(sc->sc_addr + 0x210), 0x0f); /* XXX */ 296 } 297 298 void 299 sbscn_attach_channel(struct sbscn_softc *sc, int chan, int intr) 300 { 301 struct sbscn_channel *ch = &sc->sc_channels[chan]; 302 u_long chan_addr; 303 struct tty *tp; 304 305 ch->ch_sc = sc; 306 ch->ch_num = chan; 307 308 chan_addr = sc->sc_addr + (0x100 * chan); 309 ch->ch_base = (void *)MIPS_PHYS_TO_KSEG1(chan_addr); 310 ch->ch_isr_base = 311 (void *)MIPS_PHYS_TO_KSEG1(sc->sc_addr + 0x220 + (0x20 * chan)); 312 ch->ch_imr_base = 313 (void *)MIPS_PHYS_TO_KSEG1(sc->sc_addr + 0x230 + (0x20 * chan)); 314 #ifdef XXXCGDnotyet 315 ch->ch_inchg_base = 316 (void *)MIPS_PHYS_TO_KSEG1(sc->sc_addr + 0x2d0 + (0x10 * chan)); 317 #endif 318 319 ch->ch_i_dcd = ch->ch_i_dcd_pin = 0 /* XXXCGD */; 320 ch->ch_i_cts = ch->ch_i_cts_pin = 0 /* XXXCGD */; 321 ch->ch_i_dsr = ch->ch_i_dsr_pin = 0 /* XXXCGD */; 322 ch->ch_i_ri = ch->ch_i_ri_pin = 0 /* XXXCGD */; 323 ch->ch_i_mask = 324 ch->ch_i_dcd | ch->ch_i_cts | ch->ch_i_dsr | ch->ch_i_ri; 325 ch->ch_o_dtr = ch->ch_o_dtr_pin = 0 /* XXXCGD */; 326 ch->ch_o_rts = ch->ch_o_rts_pin = 0 /* XXXCGD */; 327 ch->ch_o_mask = ch->ch_o_dtr | ch->ch_o_rts; 328 329 ch->ch_intrhand = cpu_intr_establish(intr, IPL_SERIAL, sbscn_intr, ch); 330 callout_init(&ch->ch_diag_callout); 331 332 /* Disable interrupts before configuring the device. */ 333 ch->ch_imr = 0; 334 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 335 336 if (sbscn_cons_present && 337 sbscn_cons_addr == chan_addr && sbscn_cons_chan == chan) { 338 sbscn_cons_attached = 1; 339 340 /* Make sure the console is always "hardwired". */ 341 delay(1000); /* wait for output to finish */ 342 SET(ch->ch_hwflags, SBSCN_HW_CONSOLE); 343 SET(ch->ch_swflags, TIOCFLAG_SOFTCAR); 344 } 345 346 tp = ttymalloc(); 347 tp->t_oproc = sbscn_start; 348 tp->t_param = sbscn_param; 349 tp->t_hwiflow = sbscn_hwiflow; 350 351 ch->ch_tty = tp; 352 ch->ch_rbuf = malloc(sbscn_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 353 if (ch->ch_rbuf == NULL) { 354 printf("%s: channel %d: unable to allocate ring buffer\n", 355 sc->sc_dev.dv_xname, chan); 356 return; 357 } 358 ch->ch_ebuf = ch->ch_rbuf + (sbscn_rbuf_size << 1); 359 360 tty_attach(tp); 361 362 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) { 363 int maj; 364 365 /* locate the major number */ 366 maj = cdevsw_lookup_major(&sbscn_cdevsw); 367 368 cn_tab->cn_dev = makedev(maj, (sc->sc_dev.dv_unit << 1) + chan); 369 370 printf("%s: channel %d: console\n", sc->sc_dev.dv_xname, chan); 371 } 372 373 #ifdef KGDB 374 /* 375 * Allow kgdb to "take over" this port. If this is 376 * the kgdb device, it has exclusive use. 377 */ 378 if (sbscn_kgdb_present && 379 sbscn_kgdb_addr == chan_addr && sbscn_kgdb_chan == chan) { 380 sbscn_kgdb_attached = 1; 381 382 SET(sc->sc_hwflags, SBSCN_HW_KGDB); 383 printf("%s: channel %d: kgdb\n", sc->sc_dev.dv_xname, chan); 384 } 385 #endif 386 387 ch->ch_si = softintr_establish(IPL_SOFTSERIAL, sbscn_soft, ch); 388 389 #if NRND > 0 && defined(RND_SBSCN) 390 rnd_attach_source(&ch->ch_rnd_source, sc->sc_dev.dv_xname, 391 RND_TYPE_TTY, 0); 392 #endif 393 394 sbscn_config(ch); 395 396 SET(ch->ch_hwflags, SBSCN_HW_DEV_OK); 397 } 398 399 int 400 sbscn_speed(long speed, long *brcp) 401 { 402 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 403 404 int x, err; 405 int frequency = 100000000; 406 407 *brcp = divrnd(frequency / 20, speed) - 1; 408 409 if (speed <= 0) 410 return (-1); 411 x = divrnd(frequency / 20, speed); 412 if (x <= 0) 413 return (-1); 414 err = divrnd(((quad_t)frequency) * 1000 / 20, speed * x) - 1000; 415 if (err < 0) 416 err = -err; 417 if (err > SBSCN_TOLERANCE) 418 return (-1); 419 *brcp = x - 1; 420 return (0); 421 422 #undef divrnd 423 } 424 425 #ifdef SBSCN_DEBUG 426 void sbscn_status(struct sbscn_channel *, char *); 427 428 int sbscn_debug = 0 /* XXXCGD */; 429 430 void 431 sbscn_status(struct sbscn_channel *ch, char *str) 432 { 433 struct sbscn_softc *sc = ch->ch_sc; 434 struct tty *tp = ch->ch_tty; 435 436 printf("%s: chan %d: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", 437 sc->sc_dev.dv_xname, ch->ch_num, str, 438 ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", 439 ISSET(ch->ch_iports, ch->ch_i_dcd) ? "+" : "-", 440 ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", 441 ISSET(ch->ch_oports, ch->ch_o_dtr) ? "+" : "-", 442 ch->ch_tx_stopped ? "+" : "-"); 443 444 printf("%s: chan %d: %s %scrtscts %scts %sts_ttstop %srts %xrx_flags\n", 445 sc->sc_dev.dv_xname, ch->ch_num, str, 446 ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", 447 ISSET(ch->ch_iports, ch->ch_i_cts) ? "+" : "-", 448 ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", 449 ISSET(ch->ch_oports, ch->ch_o_rts) ? "+" : "-", 450 ch->ch_rx_flags); 451 } 452 #endif 453 454 #if defined(DDB) || defined(KGDB) 455 static void 456 sbscn_enable_debugport(struct sbscn_channel *ch) 457 { 458 int s; 459 460 /* Turn on line break interrupt, set carrier. */ 461 s = splserial(); 462 463 #if 0 /* DO NOT turn on break interrupt at this time. */ 464 ch->ch_imr = 0x04; 465 #else 466 ch->ch_imr = 0x00; 467 #endif 468 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 469 SET(ch->ch_oports, ch->ch_o_dtr | ch->ch_o_rts); 470 SET_OUTPUT_SIGNALS(ch, ch->ch_oports); 471 472 splx(s); 473 } 474 #endif 475 476 void 477 sbscn_config(struct sbscn_channel *ch) 478 { 479 480 /* Disable interrupts before configuring the device. */ 481 ch->ch_imr = 0x00; 482 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 483 484 #ifdef DDB 485 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) 486 sbscn_enable_debugport(ch); 487 #endif 488 489 #ifdef KGDB 490 /* 491 * Allow kgdb to "take over" this port. If this is 492 * the kgdb device, it has exclusive use. 493 */ 494 if (ISSET(ch->ch_hwflags, SBSCN_HW_KGDB)) 495 sbscn_enable_debugport(ch); 496 #endif 497 } 498 499 void 500 sbscn_shutdown(struct sbscn_channel *ch) 501 { 502 struct tty *tp = ch->ch_tty; 503 int s; 504 505 s = splserial(); 506 507 /* If we were asserting flow control, then deassert it. */ 508 SET(ch->ch_rx_flags, RX_IBUF_BLOCKED); 509 sbscn_dohwiflow(ch); 510 511 /* Clear any break condition set with TIOCSBRK. */ 512 sbscn_break(ch, 0); 513 514 /* 515 * Hang up if necessary. Wait a bit, so the other side has time to 516 * notice even if we immediately open the port again. 517 * Avoid tsleeping above splhigh(). 518 */ 519 if (ISSET(tp->t_cflag, HUPCL)) { 520 sbscn_modem(ch, 0); 521 splx(s); 522 /* XXX tsleep will only timeout */ 523 (void) tsleep(ch, TTIPRI, ttclos, hz); 524 s = splserial(); 525 } 526 527 /* Turn off interrupts. */ 528 #ifdef DDB 529 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) 530 #if 0 /* DO NOT turn on break interrupt at this time. */ 531 ch->ch_imr = 0x04; /* interrupt on break */ 532 #else 533 ch->ch_imr = 0x00; 534 #endif 535 else 536 #endif 537 ch->ch_imr = 0; 538 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 539 540 splx(s); 541 } 542 543 int 544 sbscnopen(dev_t dev, int flag, int mode, struct proc *p) 545 { 546 int unit = SBSCN_UNIT(dev); 547 int chan = SBSCN_CHAN(dev); 548 struct sbscn_softc *sc; 549 struct sbscn_channel *ch; 550 struct tty *tp; 551 int s, s2; 552 int error; 553 554 if (unit >= sbscn_cd.cd_ndevs) 555 return (ENXIO); 556 sc = sbscn_cd.cd_devs[unit]; 557 if (sc == 0) 558 return (ENXIO); 559 ch = &sc->sc_channels[chan]; 560 if (!ISSET(ch->ch_hwflags, SBSCN_HW_DEV_OK) || ch->ch_rbuf == NULL) 561 return (ENXIO); 562 563 #ifdef KGDB 564 /* 565 * If this is the kgdb port, no other use is permitted. 566 */ 567 if (ISSET(ch->ch_hwflags, SBSCN_HW_KGDB)) 568 return (EBUSY); 569 #endif 570 571 tp = ch->ch_tty; 572 573 if (ISSET(tp->t_state, TS_ISOPEN) && 574 ISSET(tp->t_state, TS_XCLUDE) && 575 p->p_ucred->cr_uid != 0) 576 return (EBUSY); 577 578 s = spltty(); 579 580 /* 581 * Do the following iff this is a first open. 582 */ 583 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 584 struct termios t; 585 586 tp->t_dev = dev; 587 588 s2 = splserial(); 589 590 /* Turn on receive, break, and status change interrupts. */ 591 #if 0 /* DO NOT turn on break or status change interrupt at this time. */ 592 ch->ch_imr = 0xe; 593 #else 594 ch->ch_imr = 0x2; 595 #endif 596 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 597 598 /* Fetch the current modem control status, needed later. */ 599 ch->ch_iports = GET_INPUT_SIGNALS(ch); 600 ch->ch_iports_delta = 0; 601 splx(s2); 602 603 /* 604 * Initialize the termios status to the defaults. Add in the 605 * sticky bits from TIOCSFLAGS. 606 */ 607 t.c_ispeed = 0; 608 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) { 609 t.c_ospeed = sbscn_cons_rate; 610 t.c_cflag = sbscn_cons_cflag; 611 } else { 612 t.c_ospeed = TTYDEF_SPEED; 613 t.c_cflag = TTYDEF_CFLAG; 614 } 615 if (ISSET(ch->ch_swflags, TIOCFLAG_CLOCAL)) 616 SET(t.c_cflag, CLOCAL); 617 if (ISSET(ch->ch_swflags, TIOCFLAG_CRTSCTS)) 618 SET(t.c_cflag, CRTSCTS); 619 if (ISSET(ch->ch_swflags, TIOCFLAG_MDMBUF)) 620 SET(t.c_cflag, MDMBUF); 621 /* Make sure sbscn_param() will do something. */ 622 tp->t_ospeed = 0; 623 (void) sbscn_param(tp, &t); 624 tp->t_iflag = TTYDEF_IFLAG; 625 tp->t_oflag = TTYDEF_OFLAG; 626 tp->t_lflag = TTYDEF_LFLAG; 627 ttychars(tp); 628 ttsetwater(tp); 629 630 s2 = splserial(); 631 632 /* 633 * Turn on DTR. We must always do this, even if carrier is not 634 * present, because otherwise we'd have to use TIOCSDTR 635 * immediately after setting CLOCAL, which applications do not 636 * expect. We always assert DTR while the device is open 637 * unless explicitly requested to deassert it. 638 */ 639 sbscn_modem(ch, 1); 640 641 /* Clear the input ring, and unblock. */ 642 ch->ch_rbput = ch->ch_rbget = ch->ch_rbuf; 643 ch->ch_rbavail = sbscn_rbuf_size; 644 sbscn_iflush(ch); 645 CLR(ch->ch_rx_flags, RX_ANY_BLOCK); 646 sbscn_dohwiflow(ch); 647 648 #ifdef SBSCN_DEBUG 649 if (sbscn_debug) 650 sbscn_status(ch, "sbscnopen "); 651 #endif 652 653 splx(s2); 654 } 655 656 splx(s); 657 658 error = ttyopen(tp, SBSCN_DIALOUT(dev), ISSET(flag, O_NONBLOCK)); 659 if (error) 660 goto bad; 661 662 error = (*tp->t_linesw->l_open)(dev, tp); 663 if (error) 664 goto bad; 665 666 return (0); 667 668 bad: 669 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 670 /* 671 * We failed to open the device, and nobody else had it opened. 672 * Clean up the state as appropriate. 673 */ 674 sbscn_shutdown(ch); 675 } 676 677 return (error); 678 } 679 680 int 681 sbscnclose(dev_t dev, int flag, int mode, struct proc *p) 682 { 683 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 684 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 685 struct tty *tp = ch->ch_tty; 686 687 /* XXX This is for cons.c. */ 688 if (!ISSET(tp->t_state, TS_ISOPEN)) 689 return (0); 690 691 (*tp->t_linesw->l_close)(tp, flag); 692 ttyclose(tp); 693 694 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 695 /* 696 * Although we got a last close, the device may still be in 697 * use; e.g. if this was the dialout node, and there are still 698 * processes waiting for carrier on the non-dialout node. 699 */ 700 sbscn_shutdown(ch); 701 } 702 703 return (0); 704 } 705 706 int 707 sbscnread(dev_t dev, struct uio *uio, int flag) 708 { 709 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 710 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 711 struct tty *tp = ch->ch_tty; 712 713 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 714 } 715 716 int 717 sbscnwrite(dev_t dev, struct uio *uio, int flag) 718 { 719 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 720 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 721 struct tty *tp = ch->ch_tty; 722 723 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 724 } 725 726 int 727 sbscnpoll(dev_t dev, int events, struct proc *p) 728 { 729 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 730 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 731 struct tty *tp = ch->ch_tty; 732 733 return ((*tp->t_linesw->l_poll)(tp, events, p)); 734 } 735 736 struct tty * 737 sbscntty(dev_t dev) 738 { 739 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 740 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 741 struct tty *tp = ch->ch_tty; 742 743 return (tp); 744 } 745 746 int 747 sbscnioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 748 { 749 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 750 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 751 struct tty *tp = ch->ch_tty; 752 int error; 753 int s; 754 755 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 756 if (error != EPASSTHROUGH) 757 return (error); 758 759 error = ttioctl(tp, cmd, data, flag, p); 760 if (error != EPASSTHROUGH) 761 return (error); 762 763 error = 0; 764 765 s = splserial(); 766 767 switch (cmd) { 768 case TIOCSBRK: 769 sbscn_break(ch, 1); 770 break; 771 772 case TIOCCBRK: 773 sbscn_break(ch, 0); 774 break; 775 776 case TIOCSDTR: 777 sbscn_modem(ch, 1); 778 break; 779 780 case TIOCCDTR: 781 sbscn_modem(ch, 0); 782 break; 783 784 case TIOCGFLAGS: 785 *(int *)data = ch->ch_swflags; 786 break; 787 788 case TIOCSFLAGS: 789 error = suser(p->p_ucred, &p->p_acflag); 790 if (error) 791 break; 792 ch->ch_swflags = *(int *)data; 793 break; 794 795 case TIOCMSET: 796 case TIOCMBIS: 797 case TIOCMBIC: 798 tiocm_to_sbscn(ch, cmd, *(int *)data); 799 break; 800 801 case TIOCMGET: 802 *(int *)data = sbscn_to_tiocm(ch); 803 break; 804 805 default: 806 error = EPASSTHROUGH; 807 break; 808 } 809 810 splx(s); 811 812 #ifdef SBSCN_DEBUG 813 if (sbscn_debug) 814 sbscn_status(ch, "sbscn_ioctl "); 815 #endif 816 817 return (error); 818 } 819 820 integrate void 821 sbscn_schedrx(struct sbscn_channel *ch) 822 { 823 824 ch->ch_rx_ready = 1; 825 826 /* Wake up the poller. */ 827 softintr_schedule(ch->ch_si); 828 } 829 830 void 831 sbscn_break(struct sbscn_channel *ch, int onoff) 832 { 833 834 /* XXXCGD delay break until not busy */ 835 if (onoff) 836 WRITE_REG(ch->ch_base + 0x50, 0x60); 837 else 838 WRITE_REG(ch->ch_base + 0x50, 0x70); 839 840 #if 0 841 if (!ch->ch_heldchange) { 842 if (ch->ch_tx_busy) { 843 ch->ch_heldtbc = ch->ch_tbc; 844 ch->ch_tbc = 0; 845 ch->ch_heldchange = 1; 846 } else 847 sbscn_loadchannelregs(ch); 848 } 849 #endif 850 } 851 852 void 853 sbscn_modem(struct sbscn_channel *ch, int onoff) 854 { 855 856 if (ch->ch_o_dtr == 0) 857 return; 858 859 if (onoff) 860 SET(ch->ch_oports, ch->ch_o_dtr); 861 else 862 CLR(ch->ch_oports, ch->ch_o_dtr); 863 864 if (!ch->ch_heldchange) { 865 if (ch->ch_tx_busy) { 866 ch->ch_heldtbc = ch->ch_tbc; 867 ch->ch_tbc = 0; 868 ch->ch_heldchange = 1; 869 } else 870 sbscn_loadchannelregs(ch); 871 } 872 } 873 874 void 875 tiocm_to_sbscn(struct sbscn_channel *ch, int how, int ttybits) 876 { 877 u_char bits; 878 879 bits = 0; 880 if (ISSET(ttybits, TIOCM_DTR)) 881 SET(bits, ch->ch_o_dtr); 882 if (ISSET(ttybits, TIOCM_RTS)) 883 SET(bits, ch->ch_o_rts); 884 885 switch (how) { 886 case TIOCMBIC: 887 CLR(ch->ch_oports, bits); 888 break; 889 890 case TIOCMBIS: 891 SET(ch->ch_oports, bits); 892 break; 893 894 case TIOCMSET: 895 ch->ch_oports = bits; 896 break; 897 } 898 899 if (!ch->ch_heldchange) { 900 if (ch->ch_tx_busy) { 901 ch->ch_heldtbc = ch->ch_tbc; 902 ch->ch_tbc = 0; 903 ch->ch_heldchange = 1; 904 } else 905 sbscn_loadchannelregs(ch); 906 } 907 } 908 909 int 910 sbscn_to_tiocm(struct sbscn_channel *ch) 911 { 912 u_char hwbits; 913 int ttybits = 0; 914 915 hwbits = ch->ch_oports; 916 if (ISSET(hwbits, ch->ch_o_dtr)) 917 SET(ttybits, TIOCM_DTR); 918 if (ISSET(hwbits, ch->ch_o_rts)) 919 SET(ttybits, TIOCM_RTS); 920 921 hwbits = ch->ch_iports; 922 if (ISSET(hwbits, ch->ch_i_dcd)) 923 SET(ttybits, TIOCM_CD); 924 if (ISSET(hwbits, ch->ch_i_cts)) 925 SET(ttybits, TIOCM_CTS); 926 if (ISSET(hwbits, ch->ch_i_dsr)) 927 SET(ttybits, TIOCM_DSR); 928 if (ISSET(hwbits, ch->ch_i_ri)) 929 SET(ttybits, TIOCM_RI); 930 931 if (ch->ch_imr != 0) 932 SET(ttybits, TIOCM_LE); 933 934 return (ttybits); 935 } 936 937 static int 938 cflag2modes(cflag, mode1p, mode2p) 939 tcflag_t cflag; 940 u_char *mode1p; 941 u_char *mode2p; 942 { 943 u_char mode1; 944 u_char mode2; 945 int err = 0; 946 947 mode1 = mode2 = 0; 948 949 switch (ISSET(cflag, CSIZE)) { 950 case CS7: 951 mode1 |= 2; /* XXX */ 952 break; 953 default: 954 err = -1; 955 /* FALLTHRU for sanity */ 956 case CS8: 957 mode1 |= 3; /* XXX */ 958 break; 959 } 960 if (!ISSET(cflag, PARENB)) 961 mode1 |= 2 << 3; 962 else { 963 mode1 |= 0 << 3; 964 if (ISSET(cflag, PARODD)) 965 mode1 |= 1 << 2; 966 } 967 968 if (ISSET(cflag, CSTOPB)) 969 mode2 |= 1 << 3; /* two stop bits XXX not std */ 970 971 if (ISSET(cflag, CRTSCTS)) { 972 mode1 |= 1 << 7; 973 mode2 |= 1 << 4; 974 } 975 976 *mode1p = mode1; 977 *mode2p = mode2; 978 return (err); 979 } 980 981 int 982 sbscn_param(struct tty *tp, struct termios *t) 983 { 984 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(tp->t_dev)]; 985 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(tp->t_dev)]; 986 long brc; 987 u_char mode1, mode2; 988 int s; 989 990 /* XXX reset to console parameters if console? */ 991 #if 0 992 XXX disable, enable. 993 #endif 994 995 /* Check requested parameters. */ 996 if (sbscn_speed(t->c_ospeed, &brc) < 0) 997 return (EINVAL); 998 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 999 return (EINVAL); 1000 1001 /* 1002 * For the console, always force CLOCAL and !HUPCL, so that the port 1003 * is always active. 1004 */ 1005 if (ISSET(ch->ch_swflags, TIOCFLAG_SOFTCAR) || 1006 ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) { 1007 SET(t->c_cflag, CLOCAL); 1008 CLR(t->c_cflag, HUPCL); 1009 } 1010 1011 /* 1012 * If there were no changes, don't do anything. This avoids dropping 1013 * input and improves performance when all we did was frob things like 1014 * VMIN and VTIME. 1015 */ 1016 if (tp->t_ospeed == t->c_ospeed && 1017 tp->t_cflag == t->c_cflag) 1018 return (0); 1019 1020 if (cflag2modes(t->c_cflag, &mode1, &mode2) < 0) 1021 return (EINVAL); 1022 1023 s = splserial(); 1024 1025 ch->ch_mode1 = mode1; 1026 ch->ch_mode2 = mode2; 1027 1028 /* 1029 * If we're not in a mode that assumes a connection is present, then 1030 * ignore carrier changes. 1031 */ 1032 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 1033 ch->ch_i_dcd = 0; 1034 else 1035 ch->ch_i_dcd = ch->ch_i_dcd_pin; 1036 /* 1037 * Set the flow control pins depending on the current flow control 1038 * mode. 1039 */ 1040 if (ISSET(t->c_cflag, CRTSCTS)) { 1041 ch->ch_o_dtr = ch->ch_o_dtr_pin; 1042 ch->ch_o_rts = ch->ch_o_rts_pin; 1043 ch->ch_i_cts = ch->ch_i_cts_pin; 1044 /* hw controle enable bits in mod regs set by cflag2modes */ 1045 } else if (ISSET(t->c_cflag, MDMBUF)) { 1046 /* 1047 * For DTR/DCD flow control, make sure we don't toggle DTR for 1048 * carrier detection. 1049 */ 1050 ch->ch_o_dtr = 0; 1051 ch->ch_o_rts = ch->ch_o_dtr_pin; 1052 ch->ch_i_cts = ch->ch_i_dcd_pin; 1053 } else { 1054 /* 1055 * If no flow control, then always set RTS. This will make 1056 * the other side happy if it mistakenly thinks we're doing 1057 * RTS/CTS flow control. 1058 */ 1059 ch->ch_o_dtr = ch->ch_o_dtr_pin | ch->ch_o_rts_pin; 1060 ch->ch_o_rts = 0; 1061 ch->ch_i_cts = 0; 1062 if (ISSET(ch->ch_oports, ch->ch_o_dtr_pin)) 1063 SET(ch->ch_oports, ch->ch_o_rts_pin); 1064 else 1065 CLR(ch->ch_oports, ch->ch_o_rts_pin); 1066 } 1067 /* XXX maybe mask the ports which generate intrs? */ 1068 1069 ch->ch_brc = brc; 1070 1071 /* XXX maybe set fifo-full receive mode if RTSCTS and high speed? */ 1072 1073 /* And copy to tty. */ 1074 tp->t_ispeed = 0; 1075 tp->t_ospeed = t->c_ospeed; 1076 tp->t_cflag = t->c_cflag; 1077 1078 if (!ch->ch_heldchange) { 1079 if (ch->ch_tx_busy) { 1080 ch->ch_heldtbc = ch->ch_tbc; 1081 ch->ch_tbc = 0; 1082 ch->ch_heldchange = 1; 1083 } else 1084 sbscn_loadchannelregs(ch); 1085 } 1086 1087 if (!ISSET(t->c_cflag, CHWFLOW)) { 1088 /* Disable the high water mark. */ 1089 ch->ch_r_hiwat = 0; 1090 ch->ch_r_lowat = 0; 1091 if (ISSET(ch->ch_rx_flags, RX_TTY_OVERFLOWED)) { 1092 CLR(ch->ch_rx_flags, RX_TTY_OVERFLOWED); 1093 sbscn_schedrx(ch); 1094 } 1095 if (ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 1096 CLR(ch->ch_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 1097 sbscn_dohwiflow(ch); 1098 } 1099 } else { 1100 ch->ch_r_hiwat = sbscn_rbuf_hiwat; 1101 ch->ch_r_lowat = sbscn_rbuf_lowat; 1102 } 1103 1104 splx(s); 1105 1106 /* 1107 * Update the tty layer's idea of the carrier bit, in case we changed 1108 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1109 * explicit request. 1110 */ 1111 (void) (*tp->t_linesw->l_modem)(tp, 1112 ISSET(ch->ch_iports, ch->ch_i_dcd)); 1113 1114 #ifdef SBSCN_DEBUG 1115 if (sbscn_debug) 1116 sbscn_status(ch, "sbscnparam "); 1117 #endif 1118 1119 if (!ISSET(t->c_cflag, CHWFLOW)) { 1120 if (ch->ch_tx_stopped) { 1121 ch->ch_tx_stopped = 0; 1122 sbscn_start(tp); 1123 } 1124 } 1125 1126 return (0); 1127 } 1128 1129 void 1130 sbscn_iflush(struct sbscn_channel *ch) 1131 { 1132 #ifdef DIAGNOSTIC 1133 int reg; 1134 #endif 1135 int timo; 1136 1137 #ifdef DIAGNOSTIC 1138 reg = 0xffff; 1139 #endif 1140 timo = 50000; 1141 /* flush any pending I/O */ 1142 while (ISSET(READ_REG(ch->ch_base + 0x20), 0x01) 1143 && --timo) 1144 #ifdef DIAGNOSTIC 1145 reg = 1146 #else 1147 (void) 1148 #endif 1149 READ_REG(ch->ch_base + 0x60); 1150 #ifdef DIAGNOSTIC 1151 if (!timo) 1152 printf("%s: sbscn_iflush timeout %02x\n", 1153 ch->ch_sc->sc_dev.dv_xname, reg & 0xff); 1154 #endif 1155 } 1156 1157 void 1158 sbscn_loadchannelregs(struct sbscn_channel *ch) 1159 { 1160 1161 /* XXXXX necessary? */ 1162 sbscn_iflush(ch); 1163 1164 WRITE_REG(ch->ch_imr_base, 0); 1165 1166 // XXX disable? 1167 WRITE_REG(ch->ch_base + 0x00, ch->ch_mode1); 1168 WRITE_REG(ch->ch_base + 0x10, ch->ch_mode2); 1169 WRITE_REG(ch->ch_base + 0x30, ch->ch_brc); 1170 1171 ch->ch_oports_active = ch->ch_oports; 1172 SET_OUTPUT_SIGNALS(ch, ch->ch_oports_active); 1173 1174 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1175 } 1176 1177 int 1178 sbscn_hwiflow(struct tty *tp, int block) 1179 { 1180 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(tp->t_dev)]; 1181 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(tp->t_dev)]; 1182 int s; 1183 1184 if (ch->ch_o_rts == 0) 1185 return (0); 1186 1187 s = splserial(); 1188 if (block) { 1189 if (!ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED)) { 1190 SET(ch->ch_rx_flags, RX_TTY_BLOCKED); 1191 sbscn_dohwiflow(ch); 1192 } 1193 } else { 1194 if (ISSET(ch->ch_rx_flags, RX_TTY_OVERFLOWED)) { 1195 CLR(ch->ch_rx_flags, RX_TTY_OVERFLOWED); 1196 sbscn_schedrx(ch); 1197 } 1198 if (ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED)) { 1199 CLR(ch->ch_rx_flags, RX_TTY_BLOCKED); 1200 sbscn_dohwiflow(ch); 1201 } 1202 } 1203 splx(s); 1204 return (1); 1205 } 1206 1207 /* 1208 * (un)block input via hw flowcontrol 1209 */ 1210 void 1211 sbscn_dohwiflow(struct sbscn_channel *ch) 1212 { 1213 1214 if (ch->ch_o_rts == 0) 1215 return; 1216 1217 if (ISSET(ch->ch_rx_flags, RX_ANY_BLOCK)) { 1218 CLR(ch->ch_oports, ch->ch_o_rts); 1219 CLR(ch->ch_oports_active, ch->ch_o_rts); 1220 } else { 1221 SET(ch->ch_oports, ch->ch_o_rts); 1222 SET(ch->ch_oports_active, ch->ch_o_rts); 1223 } 1224 SET_OUTPUT_SIGNALS(ch, ch->ch_oports_active); 1225 } 1226 1227 void 1228 sbscn_start(struct tty *tp) 1229 { 1230 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(tp->t_dev)]; 1231 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(tp->t_dev)]; 1232 int s; 1233 1234 s = spltty(); 1235 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1236 goto out; 1237 if (ch->ch_tx_stopped) 1238 goto out; 1239 1240 if (tp->t_outq.c_cc <= tp->t_lowat) { 1241 if (ISSET(tp->t_state, TS_ASLEEP)) { 1242 CLR(tp->t_state, TS_ASLEEP); 1243 wakeup(&tp->t_outq); 1244 } 1245 selwakeup(&tp->t_wsel); 1246 if (tp->t_outq.c_cc == 0) 1247 goto out; 1248 } 1249 1250 /* Grab the first contiguous region of buffer space. */ 1251 { 1252 u_char *tba; 1253 int tbc; 1254 1255 tba = tp->t_outq.c_cf; 1256 tbc = ndqb(&tp->t_outq, 0); 1257 1258 (void)splserial(); 1259 1260 ch->ch_tba = tba; 1261 ch->ch_tbc = tbc; 1262 } 1263 1264 SET(tp->t_state, TS_BUSY); 1265 ch->ch_tx_busy = 1; 1266 1267 /* Enable transmit completion interrupts if necessary. */ 1268 if (!ISSET(ch->ch_imr, 0x1)) { 1269 SET(ch->ch_imr, 0x1); 1270 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1271 } 1272 1273 /* Output the first chunk of the contiguous buffer. */ 1274 { 1275 u_char c; 1276 1277 while (ch->ch_tbc && READ_REG(ch->ch_base + 0x20) & 0x04) { 1278 c = *ch->ch_tba++; 1279 ch->ch_tbc--; 1280 WRITE_REG(ch->ch_base + 0x70, c); 1281 } 1282 } 1283 out: 1284 splx(s); 1285 return; 1286 } 1287 1288 /* 1289 * Stop output on a line. 1290 */ 1291 void 1292 sbscnstop(struct tty *tp, int flag) 1293 { 1294 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(tp->t_dev)]; 1295 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(tp->t_dev)]; 1296 int s; 1297 1298 s = splserial(); 1299 if (ISSET(tp->t_state, TS_BUSY)) { 1300 /* Stop transmitting at the next chunk. */ 1301 ch->ch_tbc = 0; 1302 ch->ch_heldtbc = 0; 1303 if (!ISSET(tp->t_state, TS_TTSTOP)) 1304 SET(tp->t_state, TS_FLUSH); 1305 } 1306 splx(s); 1307 } 1308 1309 void 1310 sbscn_diag(arg) 1311 void *arg; 1312 { 1313 struct sbscn_channel *ch = arg; 1314 struct sbscn_softc *sc = ch->ch_sc; 1315 int overflows, floods; 1316 int s; 1317 1318 s = splserial(); 1319 overflows = ch->ch_overflows; 1320 ch->ch_overflows = 0; 1321 floods = ch->ch_floods; 1322 ch->ch_floods = 0; 1323 ch->ch_errors = 0; 1324 splx(s); 1325 1326 log(LOG_WARNING, "%s: channel %d: %d fifo overflow%s, %d ibuf flood%s\n", 1327 sc->sc_dev.dv_xname, ch->ch_num, 1328 overflows, overflows == 1 ? "" : "s", 1329 floods, floods == 1 ? "" : "s"); 1330 } 1331 1332 integrate void 1333 sbscn_rxsoft(struct sbscn_channel *ch, struct tty *tp) 1334 { 1335 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1336 u_char *get, *end; 1337 u_int cc, scc; 1338 u_char sr; 1339 int code; 1340 int s; 1341 1342 end = ch->ch_ebuf; 1343 get = ch->ch_rbget; 1344 scc = cc = sbscn_rbuf_size - ch->ch_rbavail; 1345 1346 if (cc == sbscn_rbuf_size) { 1347 ch->ch_floods++; 1348 if (ch->ch_errors++ == 0) 1349 callout_reset(&ch->ch_diag_callout, 60 * hz, 1350 sbscn_diag, ch); 1351 } 1352 1353 while (cc) { 1354 code = get[0]; 1355 sr = get[1]; 1356 if (ISSET(sr, 0xf0)) { 1357 if (ISSET(sr, 0x10)) { 1358 ch->ch_overflows++; 1359 if (ch->ch_errors++ == 0) 1360 callout_reset(&ch->ch_diag_callout, 1361 60 * hz, sbscn_diag, ch); 1362 } 1363 if (ISSET(sr, 0xc0)) 1364 SET(code, TTY_FE); 1365 if (ISSET(sr, 0x20)) 1366 SET(code, TTY_PE); 1367 } 1368 if ((*rint)(code, tp) == -1) { 1369 /* 1370 * The line discipline's buffer is out of space. 1371 */ 1372 if (!ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED)) { 1373 /* 1374 * We're either not using flow control, or the 1375 * line discipline didn't tell us to block for 1376 * some reason. Either way, we have no way to 1377 * know when there's more space available, so 1378 * just drop the rest of the data. 1379 */ 1380 get += cc << 1; 1381 if (get >= end) 1382 get -= sbscn_rbuf_size << 1; 1383 cc = 0; 1384 } else { 1385 /* 1386 * Don't schedule any more receive processing 1387 * until the line discipline tells us there's 1388 * space available (through comhwiflow()). 1389 * Leave the rest of the data in the input 1390 * buffer. 1391 */ 1392 SET(ch->ch_rx_flags, RX_TTY_OVERFLOWED); 1393 } 1394 break; 1395 } 1396 get += 2; 1397 if (get >= end) 1398 get = ch->ch_rbuf; 1399 cc--; 1400 } 1401 1402 if (cc != scc) { 1403 ch->ch_rbget = get; 1404 s = splserial(); 1405 cc = ch->ch_rbavail += scc - cc; 1406 /* Buffers should be ok again, release possible block. */ 1407 if (cc >= ch->ch_r_lowat) { 1408 if (ISSET(ch->ch_rx_flags, RX_IBUF_OVERFLOWED)) { 1409 CLR(ch->ch_rx_flags, RX_IBUF_OVERFLOWED); 1410 SET(ch->ch_imr, 0x02); 1411 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1412 } 1413 if (ISSET(ch->ch_rx_flags, RX_IBUF_BLOCKED)) { 1414 CLR(ch->ch_rx_flags, RX_IBUF_BLOCKED); 1415 sbscn_dohwiflow(ch); 1416 } 1417 } 1418 splx(s); 1419 } 1420 } 1421 1422 integrate void 1423 sbscn_txsoft(struct sbscn_channel *ch, struct tty *tp) 1424 { 1425 1426 CLR(tp->t_state, TS_BUSY); 1427 if (ISSET(tp->t_state, TS_FLUSH)) 1428 CLR(tp->t_state, TS_FLUSH); 1429 else 1430 ndflush(&tp->t_outq, (int)(ch->ch_tba - tp->t_outq.c_cf)); 1431 (*tp->t_linesw->l_start)(tp); 1432 } 1433 1434 integrate void 1435 sbscn_stsoft(struct sbscn_channel *ch, struct tty *tp) 1436 { 1437 u_char iports, delta; 1438 int s; 1439 1440 s = splserial(); 1441 iports = ch->ch_iports; 1442 delta = ch->ch_iports_delta; 1443 ch->ch_iports_delta = 0; 1444 splx(s); 1445 1446 if (ISSET(delta, ch->ch_i_dcd)) { 1447 /* 1448 * Inform the tty layer that carrier detect changed. 1449 */ 1450 (void) (*tp->t_linesw->l_modem)(tp, 1451 ISSET(iports, ch->ch_i_dcd)); 1452 } 1453 1454 if (ISSET(delta, ch->ch_i_cts)) { 1455 /* Block or unblock output according to flow control. */ 1456 if (ISSET(iports, ch->ch_i_cts)) { 1457 ch->ch_tx_stopped = 0; 1458 (*tp->t_linesw->l_start)(tp); 1459 } else { 1460 ch->ch_tx_stopped = 1; 1461 } 1462 } 1463 1464 #ifdef SBSCN_DEBUG 1465 if (sbscn_debug) 1466 sbscn_status(ch, "sbscn_stsoft"); 1467 #endif 1468 } 1469 1470 void 1471 sbscn_soft(void *arg) 1472 { 1473 struct sbscn_channel *ch = arg; 1474 struct tty *tp = ch->ch_tty; 1475 1476 if (ch->ch_rx_ready) { 1477 ch->ch_rx_ready = 0; 1478 sbscn_rxsoft(ch, tp); 1479 } 1480 1481 if (ch->ch_st_check) { 1482 ch->ch_st_check = 0; 1483 sbscn_stsoft(ch, tp); 1484 } 1485 1486 if (ch->ch_tx_done) { 1487 ch->ch_tx_done = 0; 1488 sbscn_txsoft(ch, tp); 1489 } 1490 } 1491 1492 void 1493 sbscn_intr(void *arg, uint32_t status, uint32_t pc) 1494 { 1495 struct sbscn_channel *ch = arg; 1496 u_char *put, *end; 1497 u_int cc; 1498 u_char isr, sr; 1499 1500 /* read ISR */ 1501 isr = READ_REG(ch->ch_isr_base) & ch->ch_imr; 1502 if (isr == 0) 1503 return; 1504 1505 end = ch->ch_ebuf; 1506 put = ch->ch_rbput; 1507 cc = ch->ch_rbavail; 1508 1509 do { 1510 u_char iports, delta; 1511 1512 if (isr & 0x02) { 1513 1514 sr = READ_REG(ch->ch_base + 0x20); 1515 /* XXX sr 0x01 bit must be set at this point */ 1516 1517 #if defined(DDB) || defined(KGDB) 1518 if ((sr & 0x80) == 0x80) { 1519 #ifdef DDB 1520 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) { 1521 (void)READ_REG(ch->ch_base + 0x60); 1522 console_debugger(); 1523 continue; 1524 } 1525 #endif 1526 #ifdef KGDB 1527 if (ISSET(ch->ch_hwflags, SBSCN_HW_KGDB)) { 1528 (void)READ_REG(ch->ch_base + 0x60); 1529 kgdb_connect(1); 1530 continue; 1531 } 1532 #endif 1533 } 1534 #endif /* DDB || KGDB */ 1535 1536 if (!ISSET(ch->ch_rx_flags, RX_IBUF_OVERFLOWED)) { 1537 while (cc > 0) { 1538 put[0] = READ_REG(ch->ch_base + 0x60); 1539 put[1] = sr; 1540 put += 2; 1541 if (put >= end) 1542 put = ch->ch_rbuf; 1543 cc--; 1544 1545 sr = READ_REG(ch->ch_base + 0x20); 1546 if (!ISSET(sr, 0x02)) 1547 break; 1548 } 1549 1550 /* 1551 * Current string of incoming characters ended 1552 * because no more data was available or we 1553 * ran out of space. Schedule a receive event 1554 * if any data was received. If we're out of 1555 * space, turn off receive interrupts. 1556 */ 1557 ch->ch_rbput = put; 1558 ch->ch_rbavail = cc; 1559 if (!ISSET(ch->ch_rx_flags, RX_TTY_OVERFLOWED)) 1560 ch->ch_rx_ready = 1; 1561 1562 /* 1563 * See if we are in danger of overflowing a 1564 * buffer. If so, use hardware flow control 1565 * to ease the pressure. 1566 */ 1567 if (!ISSET(ch->ch_rx_flags, RX_IBUF_BLOCKED) && 1568 cc < ch->ch_r_hiwat) { 1569 SET(ch->ch_rx_flags, RX_IBUF_BLOCKED); 1570 sbscn_dohwiflow(ch); 1571 } 1572 1573 /* 1574 * If we're out of space, disable receive 1575 * interrupts until the queue has drained 1576 * a bit. 1577 */ 1578 if (!cc) { 1579 SET(ch->ch_rx_flags, 1580 RX_IBUF_OVERFLOWED); 1581 CLR(ch->ch_imr, 0x02); 1582 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1583 } 1584 } else { 1585 /* XXX panic? */ 1586 CLR(ch->ch_imr, 0x02); 1587 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1588 continue; 1589 } 1590 } 1591 1592 if (isr & 0x01) { 1593 CLR(ch->ch_imr, 0x01); 1594 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1595 } 1596 1597 #if 0 1598 XXX 1599 if (isr & 0x08) { 1600 clear input signal change! 1601 } 1602 #endif 1603 iports = GET_INPUT_SIGNALS(ch); 1604 delta = iports ^ ch->ch_iports; 1605 ch->ch_iports = iports; 1606 1607 /* 1608 * Process normal status changes 1609 */ 1610 if (ISSET(delta, ch->ch_i_mask)) { 1611 SET(ch->ch_iports_delta, delta); 1612 1613 /* 1614 * Stop output immediately if we lose the output 1615 * flow control signal or carrier detect. 1616 */ 1617 if (ISSET(~iports, ch->ch_i_mask)) { 1618 ch->ch_tbc = 0; 1619 ch->ch_heldtbc = 0; 1620 #ifdef SBSCN_DEBUG 1621 if (sbscn_debug) 1622 sbscn_status(ch, "sbscn_intr "); 1623 #endif 1624 } 1625 1626 ch->ch_st_check = 1; 1627 } 1628 } while ((isr = (READ_REG(ch->ch_isr_base) & ch->ch_imr)) != 0); 1629 1630 /* 1631 * Done handling any receive interrupts and status changes, and 1632 * clearing the tx-ready interrupt if it was set. See if data can 1633 * be transmitted as well. Schedule tx done event if no data left 1634 * and tty was marked busy. 1635 */ 1636 sr = READ_REG(ch->ch_base + 0x20); 1637 if (ISSET(sr, 0x4)) { 1638 1639 /* 1640 * If we've delayed a parameter change, do it now, and restart 1641 * output. 1642 */ 1643 if (ch->ch_heldchange) { 1644 sbscn_loadchannelregs(ch); 1645 ch->ch_heldchange = 0; 1646 ch->ch_tbc = ch->ch_heldtbc; 1647 ch->ch_heldtbc = 0; 1648 } 1649 1650 /* Output the next chunk of the contiguous buffer, if any. */ 1651 if (ch->ch_tbc > 0) { 1652 int wrote1; 1653 u_char c; 1654 1655 wrote1 = 0; 1656 while (ch->ch_tbc && 1657 READ_REG(ch->ch_base + 0x20) & 0x04) { 1658 wrote1 = 1; 1659 c = *ch->ch_tba++; 1660 ch->ch_tbc--; 1661 WRITE_REG(ch->ch_base + 0x70, c); 1662 } 1663 if (wrote1) { 1664 SET(ch->ch_imr, 0x01); 1665 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1666 } 1667 } else { 1668 /* 1669 * transmit completion interrupts already disabled, 1670 * mark the channel tx state as done. 1671 */ 1672 if (ch->ch_tx_busy) { 1673 ch->ch_tx_busy = 0; 1674 ch->ch_tx_done = 1; 1675 } 1676 } 1677 } 1678 1679 /* Wake up the poller. */ 1680 softintr_schedule(ch->ch_si); 1681 1682 #if NRND > 0 && defined(RND_SBSCN) 1683 rnd_add_uint32(&ch->ch_rnd_source, isr | sr); 1684 #endif 1685 } 1686 1687 /* 1688 * The following functions are polled getc and putc routines, shared 1689 * by the console and kgdb glue. 1690 */ 1691 1692 int 1693 sbscn_common_getc(u_long addr, int chan) 1694 { 1695 int s = splhigh(); 1696 u_long base = MIPS_PHYS_TO_KSEG1(addr + (chan * 0x100)); 1697 int c; 1698 1699 /* block until a character becomes available */ 1700 while ((READ_REG(base + 0x20) & 0x01) == 0) 1701 continue; 1702 1703 c = READ_REG(base + 0x60) & 0xff; 1704 splx(s); 1705 return (c); 1706 } 1707 1708 void 1709 sbscn_common_putc(u_long addr, int chan, int c) 1710 { 1711 int s = splhigh(); 1712 int timo; 1713 u_long base = MIPS_PHYS_TO_KSEG1(addr + (chan * 0x100)); 1714 1715 /* wait for any pending transmission to finish */ 1716 timo = 1500000; 1717 while ((READ_REG(base + 0x20) & 0x08) == 0 && --timo) 1718 continue; 1719 1720 WRITE_REG(base + 0x70, c); 1721 1722 /* wait for this transmission to complete */ 1723 timo = 15000000; 1724 while ((READ_REG(base + 0x20) & 0x08) == 0 && --timo) 1725 continue; 1726 1727 splx(s); 1728 } 1729 1730 /* 1731 * Initialize UART for use as console or KGDB line. 1732 */ 1733 int 1734 sbscn_init(u_long addr, int chan, int rate, tcflag_t cflag) 1735 { 1736 #if 1 1737 u_long chanregbase = MIPS_PHYS_TO_KSEG1(addr + (chan * 0x100)); 1738 u_long imaskreg = MIPS_PHYS_TO_KSEG1(addr + 0x230 + (chan * 0x20)); 1739 u_char mode1, mode2; 1740 u_long brc; 1741 volatile int timo; 1742 1743 WRITE_REG(imaskreg, 0); /* disable channel intrs */ 1744 1745 /* XXX should we really do the following? how about only if enabled? */ 1746 /* wait for any pending transmission to finish */ 1747 timo = 1500000; 1748 while ((READ_REG(chanregbase + 0x20) & 0x08) == 0 && --timo) 1749 continue; 1750 1751 /* XXX: wait a little. THIS SHOULD NOT BE NECESSARY!!! (?) */ 1752 timo = 1500000; 1753 while (--timo) 1754 ; 1755 1756 WRITE_REG(chanregbase + 0x50, 2 << 4); /* reset receiver */ 1757 WRITE_REG(chanregbase + 0x50, 3 << 4); /* reset transmitter */ 1758 1759 /* set up the line for use */ 1760 (void)cflag2modes(cflag, &mode1, &mode2); 1761 (void)sbscn_speed(rate, &brc); 1762 WRITE_REG(chanregbase + 0x00, mode1); 1763 WRITE_REG(chanregbase + 0x10, mode2); 1764 WRITE_REG(chanregbase + 0x30, brc); 1765 1766 /* enable transmit and receive */ 1767 #define M_DUART_RX_EN 0x01 1768 #define M_DUART_TX_EN 0x04 1769 WRITE_REG(chanregbase + 0x50,M_DUART_RX_EN | M_DUART_TX_EN); 1770 #endif 1771 1772 /* XXX: wait a little. THIS SHOULD NOT BE NECESSARY!!! (?) */ 1773 timo = 1500000; 1774 while (--timo) 1775 ; 1776 1777 #if 0 /* XXXCGD */ 1778 bus_space_handle_t ioh; 1779 1780 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) 1781 return (ENOMEM); /* ??? */ 1782 1783 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 1784 bus_space_write_1(iot, ioh, com_efr, 0); 1785 bus_space_write_1(iot, ioh, com_lcr, LCR_DLAB); 1786 rate = comspeed(rate, frequency); 1787 bus_space_write_1(iot, ioh, com_dlbl, rate); 1788 bus_space_write_1(iot, ioh, com_dlbh, rate >> 8); 1789 bus_space_write_1(iot, ioh, com_lcr, cflag2lcr(cflag)); 1790 bus_space_write_1(iot, ioh, com_mcr, MCR_DTR | MCR_RTS); 1791 bus_space_write_1(iot, ioh, com_fifo, 1792 FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1); 1793 bus_space_write_1(iot, ioh, com_ier, 0); 1794 1795 *iohp = ioh; 1796 return (0); 1797 #endif /* XXXCGD */ 1798 /* XXXCGD */ 1799 return (0); 1800 } 1801 1802 /* 1803 * Following are all routines needed for sbscn to act as console 1804 */ 1805 int 1806 sbscn_cnattach(u_long addr, int chan, int rate, tcflag_t cflag) 1807 { 1808 int res; 1809 static struct consdev sbscn_cons = { 1810 NULL, NULL, sbscn_cngetc, sbscn_cnputc, sbscn_cnpollc, NULL, 1811 NODEV, CN_NORMAL 1812 }; 1813 1814 res = sbscn_init(addr, chan, rate, cflag); 1815 if (res) 1816 return (res); 1817 1818 cn_tab = &sbscn_cons; 1819 1820 sbscn_cons_present = 1; 1821 sbscn_cons_addr = addr; 1822 sbscn_cons_chan = chan; 1823 sbscn_cons_rate = rate; 1824 sbscn_cons_cflag = cflag; 1825 1826 return (0); 1827 } 1828 1829 int 1830 sbscn_cngetc(dev_t dev) 1831 { 1832 1833 return (sbscn_common_getc(sbscn_cons_addr, sbscn_cons_chan)); 1834 } 1835 1836 /* 1837 * Console kernel output character routine. 1838 */ 1839 void 1840 sbscn_cnputc(dev_t dev, int c) 1841 { 1842 1843 sbscn_common_putc(sbscn_cons_addr, sbscn_cons_chan, c); 1844 } 1845 1846 void 1847 sbscn_cnpollc(dev_t dev, int on) 1848 { 1849 1850 } 1851 1852 #ifdef KGDB 1853 int 1854 sbscn_kgdb_attach(u_long addr, int chan, int rate, tcflag_t cflag) 1855 { 1856 int res; 1857 1858 if (!sbscn_cons_present && 1859 sbscn_cons_addr == addr && sbscn_cons_chan == chan) 1860 return (EBUSY); /* cannot share with console */ 1861 1862 res = sbscn_init(addr, chan, rate, cflag); 1863 if (res) 1864 return (res); 1865 1866 kgdb_attach(sbscn_kgdb_getc, sbscn_kgdb_putc, NULL); 1867 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 1868 1869 sbscn_kgdb_present = 1; 1870 sbscn_kgdb_addr = addr; 1871 sbscn_kgdb_chan = chan; 1872 1873 return (0); 1874 } 1875 1876 /* ARGSUSED */ 1877 int 1878 sbscn_kgdb_getc(arg) 1879 void *arg; 1880 { 1881 1882 return (sbscn_common_getc(sbscn_kgdb_addr, sbscn_kgdb_chan)); 1883 } 1884 1885 /* ARGSUSED */ 1886 void 1887 sbscn_kgdb_putc(arg, c) 1888 void *arg; 1889 int c; 1890 { 1891 1892 sbscn_common_getc(sbscn_kgdb_addr, sbscn_kgdb_chan, c); 1893 } 1894 #endif /* KGDB */ 1895 1896 /* 1897 * helper function to identify the sbscn channels used by 1898 * console or KGDB (and not yet autoconf attached) 1899 */ 1900 int 1901 sbscn_is_console(u_long addr, int chan) 1902 { 1903 1904 if (sbscn_cons_present && !sbscn_cons_attached && 1905 sbscn_cons_addr == addr && sbscn_cons_chan == chan) 1906 return (1); 1907 #ifdef KGDB 1908 if (sbscn_kgdb_present && !sbscn_kgdb_attached && 1909 sbscn_kgdb_addr == addr && sbscn_kgdb_chan == chan) 1910 return (1); 1911 #endif 1912 return (0); 1913 } 1914
Indexes created Fri Sep 26 20:09:58 GMT 2025