sbscn.c revision 1.25
1 /* $NetBSD: sbscn.c,v 1.25 2007/11/26 23:29:37 ad 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. The "Broadcom Corporation" name may not be 19 * used to endorse or promote products derived from this software 20 * without the prior written permission of Broadcom Corporation. 21 * 22 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED 23 * WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF 24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR 25 * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE 26 * FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE 27 * LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 32 * OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /* from: $NetBSD: com.c,v 1.172 2000/05/03 19:19:04 thorpej Exp */ 36 37 /*- 38 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 39 * All rights reserved. 40 * 41 * This code is derived from software contributed to The NetBSD Foundation 42 * by Charles M. Hannum. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the NetBSD 55 * Foundation, Inc. and its contributors. 56 * 4. Neither the name of The NetBSD Foundation nor the names of its 57 * contributors may be used to endorse or promote products derived 58 * from this software without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 61 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 62 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 63 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 64 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 65 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 66 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 67 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 68 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 69 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 70 * POSSIBILITY OF SUCH DAMAGE. 71 */ 72 73 /* 74 * Copyright (c) 1991 The Regents of the University of California. 75 * All rights reserved. 76 * 77 * Redistribution and use in source and binary forms, with or without 78 * modification, are permitted provided that the following conditions 79 * are met: 80 * 1. Redistributions of source code must retain the above copyright 81 * notice, this list of conditions and the following disclaimer. 82 * 2. Redistributions in binary form must reproduce the above copyright 83 * notice, this list of conditions and the following disclaimer in the 84 * documentation and/or other materials provided with the distribution. 85 * 3. Neither the name of the University nor the names of its contributors 86 * may be used to endorse or promote products derived from this software 87 * without specific prior written permission. 88 * 89 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 90 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 91 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 92 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 93 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 94 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 95 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 96 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 97 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 98 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 99 * SUCH DAMAGE. 100 * 101 * @(#)com.c 7.5 (Berkeley) 5/16/91 102 */ 103 104 /* 105 * `sbscn' driver, supports SiByte SB-1250 SOC DUART. 106 * 107 * This DUART is quite similar in programming model to the scn2681/68681 108 * DUARTs supported by the NetBSD/amiga `mfc' and NetBSD/pc532 `scn' 109 * driver, but substantial rework would have been necessary to make 110 * those drivers sane w.r.t. bus_space (which would then have been 111 * required on NetBSD/sbmips very early on), and to accommodate the 112 * different register mappings. 113 * 114 * So, another driver. Eventually there should be One True Driver, 115 * but we're not here to save the world. 116 */ 117 118 #include <sys/cdefs.h> 119 __KERNEL_RCSID(0, "$NetBSD: sbscn.c,v 1.25 2007/11/26 23:29:37 ad Exp $"); 120 121 #define SBSCN_DEBUG 122 123 #include "opt_ddb.h" 124 125 #include "rnd.h" 126 #if NRND > 0 && defined(RND_SBSCN) 127 #include <sys/rnd.h> 128 #endif 129 130 #include <sys/param.h> 131 #include <sys/systm.h> 132 #include <sys/ioctl.h> 133 #include <sys/select.h> 134 #include <sys/tty.h> 135 #include <sys/proc.h> 136 #include <sys/user.h> 137 #include <sys/conf.h> 138 #include <sys/file.h> 139 #include <sys/uio.h> 140 #include <sys/kernel.h> 141 #include <sys/syslog.h> 142 #include <sys/types.h> 143 #include <sys/device.h> 144 #include <sys/malloc.h> 145 #include <sys/vnode.h> 146 #include <sys/kauth.h> 147 #include <sys/intr.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((int64_t *)__UNVOLATILE(rp))) 246 #define WRITE_REG(rp, val) (mips3_sd((uint64_t *)__UNVOLATILE(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, 0); 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, 369 (device_unit(&sc->sc_dev) << 1) + chan); 370 371 printf("%s: channel %d: console\n", sc->sc_dev.dv_xname, chan); 372 } 373 374 #ifdef KGDB 375 /* 376 * Allow kgdb to "take over" this port. If this is 377 * the kgdb device, it has exclusive use. 378 */ 379 if (sbscn_kgdb_present && 380 sbscn_kgdb_addr == chan_addr && sbscn_kgdb_chan == chan) { 381 sbscn_kgdb_attached = 1; 382 383 SET(sc->sc_hwflags, SBSCN_HW_KGDB); 384 printf("%s: channel %d: kgdb\n", sc->sc_dev.dv_xname, chan); 385 } 386 #endif 387 388 ch->ch_si = softint_establish(SOFTINT_SERIAL, sbscn_soft, ch); 389 390 #if NRND > 0 && defined(RND_SBSCN) 391 rnd_attach_source(&ch->ch_rnd_source, sc->sc_dev.dv_xname, 392 RND_TYPE_TTY, 0); 393 #endif 394 395 sbscn_config(ch); 396 397 SET(ch->ch_hwflags, SBSCN_HW_DEV_OK); 398 } 399 400 int 401 sbscn_speed(long speed, long *brcp) 402 { 403 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 404 405 int x, err; 406 int frequency = 100000000; 407 408 *brcp = divrnd(frequency / 20, speed) - 1; 409 410 if (speed <= 0) 411 return (-1); 412 x = divrnd(frequency / 20, speed); 413 if (x <= 0) 414 return (-1); 415 err = divrnd(((quad_t)frequency) * 1000 / 20, speed * x) - 1000; 416 if (err < 0) 417 err = -err; 418 if (err > SBSCN_TOLERANCE) 419 return (-1); 420 *brcp = x - 1; 421 return (0); 422 423 #undef divrnd 424 } 425 426 #ifdef SBSCN_DEBUG 427 void sbscn_status(struct sbscn_channel *, const char *); 428 429 int sbscn_debug = 0 /* XXXCGD */; 430 431 void 432 sbscn_status(struct sbscn_channel *ch, const char *str) 433 { 434 struct sbscn_softc *sc = ch->ch_sc; 435 struct tty *tp = ch->ch_tty; 436 437 printf("%s: chan %d: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", 438 sc->sc_dev.dv_xname, ch->ch_num, str, 439 ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", 440 ISSET(ch->ch_iports, ch->ch_i_dcd) ? "+" : "-", 441 ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", 442 ISSET(ch->ch_oports, ch->ch_o_dtr) ? "+" : "-", 443 ch->ch_tx_stopped ? "+" : "-"); 444 445 printf("%s: chan %d: %s %scrtscts %scts %sts_ttstop %srts %xrx_flags\n", 446 sc->sc_dev.dv_xname, ch->ch_num, str, 447 ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", 448 ISSET(ch->ch_iports, ch->ch_i_cts) ? "+" : "-", 449 ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", 450 ISSET(ch->ch_oports, ch->ch_o_rts) ? "+" : "-", 451 ch->ch_rx_flags); 452 } 453 #endif 454 455 #if defined(DDB) || defined(KGDB) 456 static void 457 sbscn_enable_debugport(struct sbscn_channel *ch) 458 { 459 int s; 460 461 /* Turn on line break interrupt, set carrier. */ 462 s = splserial(); 463 464 #if 0 /* DO NOT turn on break interrupt at this time. */ 465 ch->ch_imr = 0x04; 466 #else 467 ch->ch_imr = 0x00; 468 #endif 469 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 470 SET(ch->ch_oports, ch->ch_o_dtr | ch->ch_o_rts); 471 SET_OUTPUT_SIGNALS(ch, ch->ch_oports); 472 473 splx(s); 474 } 475 #endif 476 477 void 478 sbscn_config(struct sbscn_channel *ch) 479 { 480 481 /* Disable interrupts before configuring the device. */ 482 ch->ch_imr = 0x00; 483 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 484 485 #ifdef DDB 486 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) 487 sbscn_enable_debugport(ch); 488 #endif 489 490 #ifdef KGDB 491 /* 492 * Allow kgdb to "take over" this port. If this is 493 * the kgdb device, it has exclusive use. 494 */ 495 if (ISSET(ch->ch_hwflags, SBSCN_HW_KGDB)) 496 sbscn_enable_debugport(ch); 497 #endif 498 } 499 500 void 501 sbscn_shutdown(struct sbscn_channel *ch) 502 { 503 struct tty *tp = ch->ch_tty; 504 int s; 505 506 s = splserial(); 507 508 /* If we were asserting flow control, then deassert it. */ 509 SET(ch->ch_rx_flags, RX_IBUF_BLOCKED); 510 sbscn_dohwiflow(ch); 511 512 /* Clear any break condition set with TIOCSBRK. */ 513 sbscn_break(ch, 0); 514 515 /* 516 * Hang up if necessary. Wait a bit, so the other side has time to 517 * notice even if we immediately open the port again. 518 * Avoid tsleeping above splhigh(). 519 */ 520 if (ISSET(tp->t_cflag, HUPCL)) { 521 sbscn_modem(ch, 0); 522 splx(s); 523 /* XXX tsleep will only timeout */ 524 (void) tsleep(ch, TTIPRI, ttclos, hz); 525 s = splserial(); 526 } 527 528 /* Turn off interrupts. */ 529 #ifdef DDB 530 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) 531 #if 0 /* DO NOT turn on break interrupt at this time. */ 532 ch->ch_imr = 0x04; /* interrupt on break */ 533 #else 534 ch->ch_imr = 0x00; 535 #endif 536 else 537 #endif 538 ch->ch_imr = 0; 539 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 540 541 splx(s); 542 } 543 544 int 545 sbscnopen(dev_t dev, int flag, int mode, struct lwp *l) 546 { 547 int unit = SBSCN_UNIT(dev); 548 int chan = SBSCN_CHAN(dev); 549 struct sbscn_softc *sc; 550 struct sbscn_channel *ch; 551 struct tty *tp; 552 int s, s2; 553 int error; 554 555 if (unit >= sbscn_cd.cd_ndevs) 556 return (ENXIO); 557 sc = sbscn_cd.cd_devs[unit]; 558 if (sc == 0) 559 return (ENXIO); 560 ch = &sc->sc_channels[chan]; 561 if (!ISSET(ch->ch_hwflags, SBSCN_HW_DEV_OK) || ch->ch_rbuf == NULL) 562 return (ENXIO); 563 564 #ifdef KGDB 565 /* 566 * If this is the kgdb port, no other use is permitted. 567 */ 568 if (ISSET(ch->ch_hwflags, SBSCN_HW_KGDB)) 569 return (EBUSY); 570 #endif 571 572 tp = ch->ch_tty; 573 574 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 575 return (EBUSY); 576 577 s = spltty(); 578 579 /* 580 * Do the following iff this is a first open. 581 */ 582 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 583 struct termios t; 584 585 tp->t_dev = dev; 586 587 s2 = splserial(); 588 589 /* Turn on receive, break, and status change interrupts. */ 590 #if 0 /* DO NOT turn on break or status change interrupt at this time. */ 591 ch->ch_imr = 0xe; 592 #else 593 ch->ch_imr = 0x2; 594 #endif 595 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 596 597 /* Fetch the current modem control status, needed later. */ 598 ch->ch_iports = GET_INPUT_SIGNALS(ch); 599 ch->ch_iports_delta = 0; 600 splx(s2); 601 602 /* 603 * Initialize the termios status to the defaults. Add in the 604 * sticky bits from TIOCSFLAGS. 605 */ 606 t.c_ispeed = 0; 607 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) { 608 t.c_ospeed = sbscn_cons_rate; 609 t.c_cflag = sbscn_cons_cflag; 610 } else { 611 t.c_ospeed = TTYDEF_SPEED; 612 t.c_cflag = TTYDEF_CFLAG; 613 } 614 if (ISSET(ch->ch_swflags, TIOCFLAG_CLOCAL)) 615 SET(t.c_cflag, CLOCAL); 616 if (ISSET(ch->ch_swflags, TIOCFLAG_CRTSCTS)) 617 SET(t.c_cflag, CRTSCTS); 618 if (ISSET(ch->ch_swflags, TIOCFLAG_MDMBUF)) 619 SET(t.c_cflag, MDMBUF); 620 /* Make sure sbscn_param() will do something. */ 621 tp->t_ospeed = 0; 622 (void) sbscn_param(tp, &t); 623 tp->t_iflag = TTYDEF_IFLAG; 624 tp->t_oflag = TTYDEF_OFLAG; 625 tp->t_lflag = TTYDEF_LFLAG; 626 ttychars(tp); 627 ttsetwater(tp); 628 629 s2 = splserial(); 630 631 /* 632 * Turn on DTR. We must always do this, even if carrier is not 633 * present, because otherwise we'd have to use TIOCSDTR 634 * immediately after setting CLOCAL, which applications do not 635 * expect. We always assert DTR while the device is open 636 * unless explicitly requested to deassert it. 637 */ 638 sbscn_modem(ch, 1); 639 640 /* Clear the input ring, and unblock. */ 641 ch->ch_rbput = ch->ch_rbget = ch->ch_rbuf; 642 ch->ch_rbavail = sbscn_rbuf_size; 643 sbscn_iflush(ch); 644 CLR(ch->ch_rx_flags, RX_ANY_BLOCK); 645 sbscn_dohwiflow(ch); 646 647 #ifdef SBSCN_DEBUG 648 if (sbscn_debug) 649 sbscn_status(ch, "sbscnopen "); 650 #endif 651 652 splx(s2); 653 } 654 655 splx(s); 656 657 error = ttyopen(tp, SBSCN_DIALOUT(dev), ISSET(flag, O_NONBLOCK)); 658 if (error) 659 goto bad; 660 661 error = (*tp->t_linesw->l_open)(dev, tp); 662 if (error) 663 goto bad; 664 665 return (0); 666 667 bad: 668 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 669 /* 670 * We failed to open the device, and nobody else had it opened. 671 * Clean up the state as appropriate. 672 */ 673 sbscn_shutdown(ch); 674 } 675 676 return (error); 677 } 678 679 int 680 sbscnclose(dev_t dev, int flag, int mode, struct lwp *l) 681 { 682 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 683 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 684 struct tty *tp = ch->ch_tty; 685 686 /* XXX This is for cons.c. */ 687 if (!ISSET(tp->t_state, TS_ISOPEN)) 688 return (0); 689 690 (*tp->t_linesw->l_close)(tp, flag); 691 ttyclose(tp); 692 693 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 694 /* 695 * Although we got a last close, the device may still be in 696 * use; e.g. if this was the dialout node, and there are still 697 * processes waiting for carrier on the non-dialout node. 698 */ 699 sbscn_shutdown(ch); 700 } 701 702 return (0); 703 } 704 705 int 706 sbscnread(dev_t dev, struct uio *uio, int flag) 707 { 708 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 709 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 710 struct tty *tp = ch->ch_tty; 711 712 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 713 } 714 715 int 716 sbscnwrite(dev_t dev, struct uio *uio, int flag) 717 { 718 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 719 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 720 struct tty *tp = ch->ch_tty; 721 722 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 723 } 724 725 int 726 sbscnpoll(dev_t dev, int events, struct lwp *l) 727 { 728 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 729 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 730 struct tty *tp = ch->ch_tty; 731 732 return ((*tp->t_linesw->l_poll)(tp, events, l)); 733 } 734 735 struct tty * 736 sbscntty(dev_t dev) 737 { 738 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 739 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 740 struct tty *tp = ch->ch_tty; 741 742 return (tp); 743 } 744 745 int 746 sbscnioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 747 { 748 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 749 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 750 struct tty *tp = ch->ch_tty; 751 int error; 752 int s; 753 754 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 755 if (error != EPASSTHROUGH) 756 return (error); 757 758 error = ttioctl(tp, cmd, data, flag, l); 759 if (error != EPASSTHROUGH) 760 return (error); 761 762 error = 0; 763 764 s = splserial(); 765 766 switch (cmd) { 767 case TIOCSBRK: 768 sbscn_break(ch, 1); 769 break; 770 771 case TIOCCBRK: 772 sbscn_break(ch, 0); 773 break; 774 775 case TIOCSDTR: 776 sbscn_modem(ch, 1); 777 break; 778 779 case TIOCCDTR: 780 sbscn_modem(ch, 0); 781 break; 782 783 case TIOCGFLAGS: 784 *(int *)data = ch->ch_swflags; 785 break; 786 787 case TIOCSFLAGS: 788 error = kauth_authorize_device_tty(l->l_cred, 789 KAUTH_DEVICE_TTY_PRIVSET, tp); 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 softint_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 if (!ttypull(tp)) 1240 goto out; 1241 1242 /* Grab the first contiguous region of buffer space. */ 1243 { 1244 u_char *tba; 1245 int tbc; 1246 1247 tba = tp->t_outq.c_cf; 1248 tbc = ndqb(&tp->t_outq, 0); 1249 1250 (void)splserial(); 1251 1252 ch->ch_tba = tba; 1253 ch->ch_tbc = tbc; 1254 } 1255 1256 SET(tp->t_state, TS_BUSY); 1257 ch->ch_tx_busy = 1; 1258 1259 /* Enable transmit completion interrupts if necessary. */ 1260 if (!ISSET(ch->ch_imr, 0x1)) { 1261 SET(ch->ch_imr, 0x1); 1262 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1263 } 1264 1265 /* Output the first chunk of the contiguous buffer. */ 1266 { 1267 u_char c; 1268 1269 while (ch->ch_tbc && READ_REG(ch->ch_base + 0x20) & 0x04) { 1270 c = *ch->ch_tba++; 1271 ch->ch_tbc--; 1272 WRITE_REG(ch->ch_base + 0x70, c); 1273 } 1274 } 1275 out: 1276 splx(s); 1277 return; 1278 } 1279 1280 /* 1281 * Stop output on a line. 1282 */ 1283 void 1284 sbscnstop(struct tty *tp, int flag) 1285 { 1286 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(tp->t_dev)]; 1287 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(tp->t_dev)]; 1288 int s; 1289 1290 s = splserial(); 1291 if (ISSET(tp->t_state, TS_BUSY)) { 1292 /* Stop transmitting at the next chunk. */ 1293 ch->ch_tbc = 0; 1294 ch->ch_heldtbc = 0; 1295 if (!ISSET(tp->t_state, TS_TTSTOP)) 1296 SET(tp->t_state, TS_FLUSH); 1297 } 1298 splx(s); 1299 } 1300 1301 void 1302 sbscn_diag(arg) 1303 void *arg; 1304 { 1305 struct sbscn_channel *ch = arg; 1306 struct sbscn_softc *sc = ch->ch_sc; 1307 int overflows, floods; 1308 int s; 1309 1310 s = splserial(); 1311 overflows = ch->ch_overflows; 1312 ch->ch_overflows = 0; 1313 floods = ch->ch_floods; 1314 ch->ch_floods = 0; 1315 ch->ch_errors = 0; 1316 splx(s); 1317 1318 log(LOG_WARNING, "%s: channel %d: %d fifo overflow%s, %d ibuf flood%s\n", 1319 sc->sc_dev.dv_xname, ch->ch_num, 1320 overflows, overflows == 1 ? "" : "s", 1321 floods, floods == 1 ? "" : "s"); 1322 } 1323 1324 integrate void 1325 sbscn_rxsoft(struct sbscn_channel *ch, struct tty *tp) 1326 { 1327 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1328 u_char *get, *end; 1329 u_int cc, scc; 1330 u_char sr; 1331 int code; 1332 int s; 1333 1334 end = ch->ch_ebuf; 1335 get = ch->ch_rbget; 1336 scc = cc = sbscn_rbuf_size - ch->ch_rbavail; 1337 1338 if (cc == sbscn_rbuf_size) { 1339 ch->ch_floods++; 1340 if (ch->ch_errors++ == 0) 1341 callout_reset(&ch->ch_diag_callout, 60 * hz, 1342 sbscn_diag, ch); 1343 } 1344 1345 while (cc) { 1346 code = get[0]; 1347 sr = get[1]; 1348 if (ISSET(sr, 0xf0)) { 1349 if (ISSET(sr, 0x10)) { 1350 ch->ch_overflows++; 1351 if (ch->ch_errors++ == 0) 1352 callout_reset(&ch->ch_diag_callout, 1353 60 * hz, sbscn_diag, ch); 1354 } 1355 if (ISSET(sr, 0xc0)) 1356 SET(code, TTY_FE); 1357 if (ISSET(sr, 0x20)) 1358 SET(code, TTY_PE); 1359 } 1360 if ((*rint)(code, tp) == -1) { 1361 /* 1362 * The line discipline's buffer is out of space. 1363 */ 1364 if (!ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED)) { 1365 /* 1366 * We're either not using flow control, or the 1367 * line discipline didn't tell us to block for 1368 * some reason. Either way, we have no way to 1369 * know when there's more space available, so 1370 * just drop the rest of the data. 1371 */ 1372 get += cc << 1; 1373 if (get >= end) 1374 get -= sbscn_rbuf_size << 1; 1375 cc = 0; 1376 } else { 1377 /* 1378 * Don't schedule any more receive processing 1379 * until the line discipline tells us there's 1380 * space available (through comhwiflow()). 1381 * Leave the rest of the data in the input 1382 * buffer. 1383 */ 1384 SET(ch->ch_rx_flags, RX_TTY_OVERFLOWED); 1385 } 1386 break; 1387 } 1388 get += 2; 1389 if (get >= end) 1390 get = ch->ch_rbuf; 1391 cc--; 1392 } 1393 1394 if (cc != scc) { 1395 ch->ch_rbget = get; 1396 s = splserial(); 1397 cc = ch->ch_rbavail += scc - cc; 1398 /* Buffers should be ok again, release possible block. */ 1399 if (cc >= ch->ch_r_lowat) { 1400 if (ISSET(ch->ch_rx_flags, RX_IBUF_OVERFLOWED)) { 1401 CLR(ch->ch_rx_flags, RX_IBUF_OVERFLOWED); 1402 SET(ch->ch_imr, 0x02); 1403 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1404 } 1405 if (ISSET(ch->ch_rx_flags, RX_IBUF_BLOCKED)) { 1406 CLR(ch->ch_rx_flags, RX_IBUF_BLOCKED); 1407 sbscn_dohwiflow(ch); 1408 } 1409 } 1410 splx(s); 1411 } 1412 } 1413 1414 integrate void 1415 sbscn_txsoft(struct sbscn_channel *ch, struct tty *tp) 1416 { 1417 1418 CLR(tp->t_state, TS_BUSY); 1419 if (ISSET(tp->t_state, TS_FLUSH)) 1420 CLR(tp->t_state, TS_FLUSH); 1421 else 1422 ndflush(&tp->t_outq, (int)(ch->ch_tba - tp->t_outq.c_cf)); 1423 (*tp->t_linesw->l_start)(tp); 1424 } 1425 1426 integrate void 1427 sbscn_stsoft(struct sbscn_channel *ch, struct tty *tp) 1428 { 1429 u_char iports, delta; 1430 int s; 1431 1432 s = splserial(); 1433 iports = ch->ch_iports; 1434 delta = ch->ch_iports_delta; 1435 ch->ch_iports_delta = 0; 1436 splx(s); 1437 1438 if (ISSET(delta, ch->ch_i_dcd)) { 1439 /* 1440 * Inform the tty layer that carrier detect changed. 1441 */ 1442 (void) (*tp->t_linesw->l_modem)(tp, 1443 ISSET(iports, ch->ch_i_dcd)); 1444 } 1445 1446 if (ISSET(delta, ch->ch_i_cts)) { 1447 /* Block or unblock output according to flow control. */ 1448 if (ISSET(iports, ch->ch_i_cts)) { 1449 ch->ch_tx_stopped = 0; 1450 (*tp->t_linesw->l_start)(tp); 1451 } else { 1452 ch->ch_tx_stopped = 1; 1453 } 1454 } 1455 1456 #ifdef SBSCN_DEBUG 1457 if (sbscn_debug) 1458 sbscn_status(ch, "sbscn_stsoft"); 1459 #endif 1460 } 1461 1462 void 1463 sbscn_soft(void *arg) 1464 { 1465 struct sbscn_channel *ch = arg; 1466 struct tty *tp = ch->ch_tty; 1467 1468 if (ch->ch_rx_ready) { 1469 ch->ch_rx_ready = 0; 1470 sbscn_rxsoft(ch, tp); 1471 } 1472 1473 if (ch->ch_st_check) { 1474 ch->ch_st_check = 0; 1475 sbscn_stsoft(ch, tp); 1476 } 1477 1478 if (ch->ch_tx_done) { 1479 ch->ch_tx_done = 0; 1480 sbscn_txsoft(ch, tp); 1481 } 1482 } 1483 1484 void 1485 sbscn_intr(void *arg, uint32_t status, uint32_t pc) 1486 { 1487 struct sbscn_channel *ch = arg; 1488 u_char *put, *end; 1489 u_int cc; 1490 u_char isr, sr; 1491 1492 /* read ISR */ 1493 isr = READ_REG(ch->ch_isr_base) & ch->ch_imr; 1494 if (isr == 0) 1495 return; 1496 1497 end = ch->ch_ebuf; 1498 put = ch->ch_rbput; 1499 cc = ch->ch_rbavail; 1500 1501 do { 1502 u_char iports, delta; 1503 1504 if (isr & 0x02) { 1505 1506 sr = READ_REG(ch->ch_base + 0x20); 1507 /* XXX sr 0x01 bit must be set at this point */ 1508 1509 #if defined(DDB) || defined(KGDB) 1510 if ((sr & 0x80) == 0x80) { 1511 #ifdef DDB 1512 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) { 1513 (void)READ_REG(ch->ch_base + 0x60); 1514 console_debugger(); 1515 continue; 1516 } 1517 #endif 1518 #ifdef KGDB 1519 if (ISSET(ch->ch_hwflags, SBSCN_HW_KGDB)) { 1520 (void)READ_REG(ch->ch_base + 0x60); 1521 kgdb_connect(1); 1522 continue; 1523 } 1524 #endif 1525 } 1526 #endif /* DDB || KGDB */ 1527 1528 if (!ISSET(ch->ch_rx_flags, RX_IBUF_OVERFLOWED)) { 1529 while (cc > 0) { 1530 put[0] = READ_REG(ch->ch_base + 0x60); 1531 put[1] = sr; 1532 put += 2; 1533 if (put >= end) 1534 put = ch->ch_rbuf; 1535 cc--; 1536 1537 sr = READ_REG(ch->ch_base + 0x20); 1538 if (!ISSET(sr, 0x02)) 1539 break; 1540 } 1541 1542 /* 1543 * Current string of incoming characters ended 1544 * because no more data was available or we 1545 * ran out of space. Schedule a receive event 1546 * if any data was received. If we're out of 1547 * space, turn off receive interrupts. 1548 */ 1549 ch->ch_rbput = put; 1550 ch->ch_rbavail = cc; 1551 if (!ISSET(ch->ch_rx_flags, RX_TTY_OVERFLOWED)) 1552 ch->ch_rx_ready = 1; 1553 1554 /* 1555 * See if we are in danger of overflowing a 1556 * buffer. If so, use hardware flow control 1557 * to ease the pressure. 1558 */ 1559 if (!ISSET(ch->ch_rx_flags, RX_IBUF_BLOCKED) && 1560 cc < ch->ch_r_hiwat) { 1561 SET(ch->ch_rx_flags, RX_IBUF_BLOCKED); 1562 sbscn_dohwiflow(ch); 1563 } 1564 1565 /* 1566 * If we're out of space, disable receive 1567 * interrupts until the queue has drained 1568 * a bit. 1569 */ 1570 if (!cc) { 1571 SET(ch->ch_rx_flags, 1572 RX_IBUF_OVERFLOWED); 1573 CLR(ch->ch_imr, 0x02); 1574 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1575 } 1576 } else { 1577 /* XXX panic? */ 1578 CLR(ch->ch_imr, 0x02); 1579 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1580 continue; 1581 } 1582 } 1583 1584 if (isr & 0x01) { 1585 CLR(ch->ch_imr, 0x01); 1586 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1587 } 1588 1589 #if 0 1590 XXX 1591 if (isr & 0x08) { 1592 clear input signal change! 1593 } 1594 #endif 1595 iports = GET_INPUT_SIGNALS(ch); 1596 delta = iports ^ ch->ch_iports; 1597 ch->ch_iports = iports; 1598 1599 /* 1600 * Process normal status changes 1601 */ 1602 if (ISSET(delta, ch->ch_i_mask)) { 1603 SET(ch->ch_iports_delta, delta); 1604 1605 /* 1606 * Stop output immediately if we lose the output 1607 * flow control signal or carrier detect. 1608 */ 1609 if (ISSET(~iports, ch->ch_i_mask)) { 1610 ch->ch_tbc = 0; 1611 ch->ch_heldtbc = 0; 1612 #ifdef SBSCN_DEBUG 1613 if (sbscn_debug) 1614 sbscn_status(ch, "sbscn_intr "); 1615 #endif 1616 } 1617 1618 ch->ch_st_check = 1; 1619 } 1620 } while ((isr = (READ_REG(ch->ch_isr_base) & ch->ch_imr)) != 0); 1621 1622 /* 1623 * Done handling any receive interrupts and status changes, and 1624 * clearing the tx-ready interrupt if it was set. See if data can 1625 * be transmitted as well. Schedule tx done event if no data left 1626 * and tty was marked busy. 1627 */ 1628 sr = READ_REG(ch->ch_base + 0x20); 1629 if (ISSET(sr, 0x4)) { 1630 1631 /* 1632 * If we've delayed a parameter change, do it now, and restart 1633 * output. 1634 */ 1635 if (ch->ch_heldchange) { 1636 sbscn_loadchannelregs(ch); 1637 ch->ch_heldchange = 0; 1638 ch->ch_tbc = ch->ch_heldtbc; 1639 ch->ch_heldtbc = 0; 1640 } 1641 1642 /* Output the next chunk of the contiguous buffer, if any. */ 1643 if (ch->ch_tbc > 0) { 1644 int wrote1; 1645 u_char c; 1646 1647 wrote1 = 0; 1648 while (ch->ch_tbc && 1649 READ_REG(ch->ch_base + 0x20) & 0x04) { 1650 wrote1 = 1; 1651 c = *ch->ch_tba++; 1652 ch->ch_tbc--; 1653 WRITE_REG(ch->ch_base + 0x70, c); 1654 } 1655 if (wrote1) { 1656 SET(ch->ch_imr, 0x01); 1657 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1658 } 1659 } else { 1660 /* 1661 * transmit completion interrupts already disabled, 1662 * mark the channel tx state as done. 1663 */ 1664 if (ch->ch_tx_busy) { 1665 ch->ch_tx_busy = 0; 1666 ch->ch_tx_done = 1; 1667 } 1668 } 1669 } 1670 1671 /* Wake up the poller. */ 1672 softint_schedule(ch->ch_si); 1673 1674 #if NRND > 0 && defined(RND_SBSCN) 1675 rnd_add_uint32(&ch->ch_rnd_source, isr | sr); 1676 #endif 1677 } 1678 1679 /* 1680 * The following functions are polled getc and putc routines, shared 1681 * by the console and kgdb glue. 1682 */ 1683 1684 int 1685 sbscn_common_getc(u_long addr, int chan) 1686 { 1687 int s = splhigh(); 1688 u_long base = MIPS_PHYS_TO_KSEG1(addr + (chan * 0x100)); 1689 int c; 1690 1691 /* block until a character becomes available */ 1692 while ((READ_REG(base + 0x20) & 0x01) == 0) 1693 continue; 1694 1695 c = READ_REG(base + 0x60) & 0xff; 1696 splx(s); 1697 return (c); 1698 } 1699 1700 void 1701 sbscn_common_putc(u_long addr, int chan, int c) 1702 { 1703 int s = splhigh(); 1704 int timo; 1705 u_long base = MIPS_PHYS_TO_KSEG1(addr + (chan * 0x100)); 1706 1707 /* wait for any pending transmission to finish */ 1708 timo = 1500000; 1709 while ((READ_REG(base + 0x20) & 0x08) == 0 && --timo) 1710 continue; 1711 1712 WRITE_REG(base + 0x70, c); 1713 1714 /* wait for this transmission to complete */ 1715 timo = 15000000; 1716 while ((READ_REG(base + 0x20) & 0x08) == 0 && --timo) 1717 continue; 1718 1719 splx(s); 1720 } 1721 1722 /* 1723 * Initialize UART for use as console or KGDB line. 1724 */ 1725 int 1726 sbscn_init(u_long addr, int chan, int rate, tcflag_t cflag) 1727 { 1728 #if 1 1729 u_long chanregbase = MIPS_PHYS_TO_KSEG1(addr + (chan * 0x100)); 1730 u_long imaskreg = MIPS_PHYS_TO_KSEG1(addr + 0x230 + (chan * 0x20)); 1731 u_char mode1, mode2; 1732 u_long brc; 1733 volatile int timo; 1734 1735 WRITE_REG(imaskreg, 0); /* disable channel intrs */ 1736 1737 /* XXX should we really do the following? how about only if enabled? */ 1738 /* wait for any pending transmission to finish */ 1739 timo = 1500000; 1740 while ((READ_REG(chanregbase + 0x20) & 0x08) == 0 && --timo) 1741 continue; 1742 1743 /* XXX: wait a little. THIS SHOULD NOT BE NECESSARY!!! (?) */ 1744 timo = 1500000; 1745 while (--timo) 1746 ; 1747 1748 WRITE_REG(chanregbase + 0x50, 2 << 4); /* reset receiver */ 1749 WRITE_REG(chanregbase + 0x50, 3 << 4); /* reset transmitter */ 1750 1751 /* set up the line for use */ 1752 (void)cflag2modes(cflag, &mode1, &mode2); 1753 (void)sbscn_speed(rate, &brc); 1754 WRITE_REG(chanregbase + 0x00, mode1); 1755 WRITE_REG(chanregbase + 0x10, mode2); 1756 WRITE_REG(chanregbase + 0x30, brc); 1757 1758 /* enable transmit and receive */ 1759 #define M_DUART_RX_EN 0x01 1760 #define M_DUART_TX_EN 0x04 1761 WRITE_REG(chanregbase + 0x50,M_DUART_RX_EN | M_DUART_TX_EN); 1762 #endif 1763 1764 /* XXX: wait a little. THIS SHOULD NOT BE NECESSARY!!! (?) */ 1765 timo = 1500000; 1766 while (--timo) 1767 ; 1768 1769 #if 0 /* XXXCGD */ 1770 bus_space_handle_t ioh; 1771 1772 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) 1773 return (ENOMEM); /* ??? */ 1774 1775 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 1776 bus_space_write_1(iot, ioh, com_efr, 0); 1777 bus_space_write_1(iot, ioh, com_lcr, LCR_DLAB); 1778 rate = comspeed(rate, frequency); 1779 bus_space_write_1(iot, ioh, com_dlbl, rate); 1780 bus_space_write_1(iot, ioh, com_dlbh, rate >> 8); 1781 bus_space_write_1(iot, ioh, com_lcr, cflag2lcr(cflag)); 1782 bus_space_write_1(iot, ioh, com_mcr, MCR_DTR | MCR_RTS); 1783 bus_space_write_1(iot, ioh, com_fifo, 1784 FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1); 1785 bus_space_write_1(iot, ioh, com_ier, 0); 1786 1787 *iohp = ioh; 1788 return (0); 1789 #endif /* XXXCGD */ 1790 /* XXXCGD */ 1791 return (0); 1792 } 1793 1794 /* 1795 * Following are all routines needed for sbscn to act as console 1796 */ 1797 int 1798 sbscn_cnattach(u_long addr, int chan, int rate, tcflag_t cflag) 1799 { 1800 int res; 1801 static struct consdev sbscn_cons = { 1802 NULL, NULL, sbscn_cngetc, sbscn_cnputc, sbscn_cnpollc, NULL, 1803 NULL, NULL, NODEV, CN_NORMAL 1804 }; 1805 1806 res = sbscn_init(addr, chan, rate, cflag); 1807 if (res) 1808 return (res); 1809 1810 cn_tab = &sbscn_cons; 1811 1812 sbscn_cons_present = 1; 1813 sbscn_cons_addr = addr; 1814 sbscn_cons_chan = chan; 1815 sbscn_cons_rate = rate; 1816 sbscn_cons_cflag = cflag; 1817 1818 return (0); 1819 } 1820 1821 int 1822 sbscn_cngetc(dev_t dev) 1823 { 1824 1825 return (sbscn_common_getc(sbscn_cons_addr, sbscn_cons_chan)); 1826 } 1827 1828 /* 1829 * Console kernel output character routine. 1830 */ 1831 void 1832 sbscn_cnputc(dev_t dev, int c) 1833 { 1834 1835 sbscn_common_putc(sbscn_cons_addr, sbscn_cons_chan, c); 1836 } 1837 1838 void 1839 sbscn_cnpollc(dev_t dev, int on) 1840 { 1841 1842 } 1843 1844 #ifdef KGDB 1845 int 1846 sbscn_kgdb_attach(u_long addr, int chan, int rate, tcflag_t cflag) 1847 { 1848 int res; 1849 1850 if (!sbscn_cons_present && 1851 sbscn_cons_addr == addr && sbscn_cons_chan == chan) 1852 return (EBUSY); /* cannot share with console */ 1853 1854 res = sbscn_init(addr, chan, rate, cflag); 1855 if (res) 1856 return (res); 1857 1858 kgdb_attach(sbscn_kgdb_getc, sbscn_kgdb_putc, NULL); 1859 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 1860 1861 sbscn_kgdb_present = 1; 1862 sbscn_kgdb_addr = addr; 1863 sbscn_kgdb_chan = chan; 1864 1865 return (0); 1866 } 1867 1868 /* ARGSUSED */ 1869 int 1870 sbscn_kgdb_getc(arg) 1871 void *arg; 1872 { 1873 1874 return (sbscn_common_getc(sbscn_kgdb_addr, sbscn_kgdb_chan)); 1875 } 1876 1877 /* ARGSUSED */ 1878 void 1879 sbscn_kgdb_putc(arg, c) 1880 void *arg; 1881 int c; 1882 { 1883 1884 sbscn_common_getc(sbscn_kgdb_addr, sbscn_kgdb_chan, c); 1885 } 1886 #endif /* KGDB */ 1887 1888 /* 1889 * helper function to identify the sbscn channels used by 1890 * console or KGDB (and not yet autoconf attached) 1891 */ 1892 int 1893 sbscn_is_console(u_long addr, int chan) 1894 { 1895 1896 if (sbscn_cons_present && !sbscn_cons_attached && 1897 sbscn_cons_addr == addr && sbscn_cons_chan == chan) 1898 return (1); 1899 #ifdef KGDB 1900 if (sbscn_kgdb_present && !sbscn_kgdb_attached && 1901 sbscn_kgdb_addr == addr && sbscn_kgdb_chan == chan) 1902 return (1); 1903 #endif 1904 return (0); 1905 } 1906
Indexes created Mon Sep 29 21:09:56 GMT 2025