sbscn.c revision 1.22.8.1
1 /* $NetBSD: sbscn.c,v 1.22.8.1 2007/11/21 21:53:23 joerg 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 1.22.8.1 2007/11/21 21:53:23 joerg 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> 147 148 #include <mips/sibyte/dev/sbobiovar.h> 149 #if 0 150 #include <mips/sibyte/dev/sbscnreg.h> 151 #endif 152 #include <mips/sibyte/dev/sbscnvar.h> 153 #include <dev/cons.h> 154 #include <machine/locore.h> 155 156 void sbscn_attach_channel(struct sbscn_softc *sc, int chan, int intr); 157 #if defined(DDB) || defined(KGDB) 158 static void sbscn_enable_debugport(struct sbscn_channel *ch); 159 #endif 160 void sbscn_config(struct sbscn_channel *ch); 161 void sbscn_shutdown(struct sbscn_channel *ch); 162 int sbscn_speed(long, long *); 163 static int cflag2modes(tcflag_t, u_char *, u_char *); 164 int sbscn_param(struct tty *, struct termios *); 165 void sbscn_start(struct tty *); 166 int sbscn_hwiflow(struct tty *, int); 167 168 void sbscn_loadchannelregs(struct sbscn_channel *); 169 void sbscn_dohwiflow(struct sbscn_channel *); 170 void sbscn_break(struct sbscn_channel *, int); 171 void sbscn_modem(struct sbscn_channel *, int); 172 void tiocm_to_sbscn(struct sbscn_channel *, int, int); 173 int sbscn_to_tiocm(struct sbscn_channel *); 174 void sbscn_iflush(struct sbscn_channel *); 175 176 int sbscn_init(u_long addr, int chan, int rate, tcflag_t cflag); 177 int sbscn_common_getc(u_long addr, int chan); 178 void sbscn_common_putc(u_long addr, int chan, int c); 179 void sbscn_intr(void *arg, uint32_t status, uint32_t pc); 180 181 int sbscn_cngetc(dev_t dev); 182 void sbscn_cnputc(dev_t dev, int c); 183 void sbscn_cnpollc(dev_t dev, int on); 184 185 extern struct cfdriver sbscn_cd; 186 187 dev_type_open(sbscnopen); 188 dev_type_close(sbscnclose); 189 dev_type_read(sbscnread); 190 dev_type_write(sbscnwrite); 191 dev_type_ioctl(sbscnioctl); 192 dev_type_stop(sbscnstop); 193 dev_type_tty(sbscntty); 194 dev_type_poll(sbscnpoll); 195 196 const struct cdevsw sbscn_cdevsw = { 197 sbscnopen, sbscnclose, sbscnread, sbscnwrite, sbscnioctl, 198 sbscnstop, sbscntty, sbscnpoll, nommap, ttykqfilter, D_TTY 199 }; 200 201 #define integrate static inline 202 void sbscn_soft(void *); 203 integrate void sbscn_rxsoft(struct sbscn_channel *, struct tty *); 204 integrate void sbscn_txsoft(struct sbscn_channel *, struct tty *); 205 integrate void sbscn_stsoft(struct sbscn_channel *, struct tty *); 206 integrate void sbscn_schedrx(struct sbscn_channel *); 207 void sbscn_diag(void *); 208 209 /* 210 * Make this an option variable one can patch. 211 * But be warned: this must be a power of 2! 212 */ 213 u_int sbscn_rbuf_size = SBSCN_RING_SIZE; 214 215 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 216 u_int sbscn_rbuf_hiwat = (SBSCN_RING_SIZE * 1) / 4; 217 u_int sbscn_rbuf_lowat = (SBSCN_RING_SIZE * 3) / 4; 218 219 static int sbscn_cons_present; 220 static int sbscn_cons_attached; 221 static u_long sbscn_cons_addr; 222 static int sbscn_cons_chan; 223 static int sbscn_cons_rate; 224 static tcflag_t sbscn_cons_cflag; 225 226 #ifdef KGDB 227 #include <sys/kgdb.h> 228 229 static int sbscn_kgdb_present; 230 static int sbscn_kgdb_attached; 231 static u_long sbscn_kgdb_addr; 232 static int sbscn_kgdb_chan; 233 234 int sbscn_kgdb_getc(void *); 235 void sbscn_kgdb_putc(void *, int); 236 #endif /* KGDB */ 237 238 static int sbscn_match(struct device *, struct cfdata *, void *); 239 static void sbscn_attach(struct device *, struct device *, void *); 240 241 CFATTACH_DECL(sbscn, sizeof(struct sbscn_softc), 242 sbscn_match, sbscn_attach, NULL, NULL); 243 244 #define READ_REG(rp) (mips3_ld((int64_t *)__UNVOLATILE(rp))) 245 #define WRITE_REG(rp, val) (mips3_sd((uint64_t *)__UNVOLATILE(rp), (val))) 246 247 /* 248 * input and output signals are actually the _inverse_ of the bits in the 249 * input and output port registers! 250 */ 251 #define GET_INPUT_SIGNALS(ch) \ 252 ((~READ_REG(MIPS_PHYS_TO_KSEG1((ch)->ch_sc->sc_addr + 0x280))) & (ch)->ch_i_mask) 253 #define SET_OUTPUT_SIGNALS(ch, val) \ 254 do { \ 255 int sigs_to_set, sigs_to_clr; \ 256 \ 257 sigs_to_set = (ch)->ch_o_mask & val; \ 258 sigs_to_clr = (ch)->ch_o_mask & ~val; \ 259 \ 260 /* set signals by clearing op bits, and vice versa */ \ 261 WRITE_REG(MIPS_PHYS_TO_KSEG1((ch)->ch_sc->sc_addr + 0x2c0), \ 262 sigs_to_set); \ 263 WRITE_REG(MIPS_PHYS_TO_KSEG1((ch)->ch_sc->sc_addr + 0x2b0), \ 264 sigs_to_clr); \ 265 } while (0) 266 267 static int 268 sbscn_match(struct device *parent, struct cfdata *match, void *aux) 269 { 270 struct sbobio_attach_args *sap = aux; 271 272 if (sap->sa_locs.sa_type != SBOBIO_DEVTYPE_DUART) 273 return (0); 274 275 return 1; 276 } 277 278 static void 279 sbscn_attach(struct device *parent, struct device *self, void *aux) 280 { 281 struct sbscn_softc *sc = (struct sbscn_softc *)self; 282 struct sbobio_attach_args *sap = aux; 283 int i; 284 285 sc->sc_addr = sap->sa_base + sap->sa_locs.sa_offset; 286 287 printf("\n"); 288 for (i = 0; i < 2; i++) 289 sbscn_attach_channel(sc, i, sap->sa_locs.sa_intr[i]); 290 291 /* init duart_opcr */ 292 WRITE_REG(MIPS_PHYS_TO_KSEG1(sc->sc_addr + 0x270), 0); 293 /* init duart_aux_ctrl */ 294 WRITE_REG(MIPS_PHYS_TO_KSEG1(sc->sc_addr + 0x210), 0x0f); /* XXX */ 295 } 296 297 void 298 sbscn_attach_channel(struct sbscn_softc *sc, int chan, int intr) 299 { 300 struct sbscn_channel *ch = &sc->sc_channels[chan]; 301 u_long chan_addr; 302 struct tty *tp; 303 304 ch->ch_sc = sc; 305 ch->ch_num = chan; 306 307 chan_addr = sc->sc_addr + (0x100 * chan); 308 ch->ch_base = (void *)MIPS_PHYS_TO_KSEG1(chan_addr); 309 ch->ch_isr_base = 310 (void *)MIPS_PHYS_TO_KSEG1(sc->sc_addr + 0x220 + (0x20 * chan)); 311 ch->ch_imr_base = 312 (void *)MIPS_PHYS_TO_KSEG1(sc->sc_addr + 0x230 + (0x20 * chan)); 313 #ifdef XXXCGDnotyet 314 ch->ch_inchg_base = 315 (void *)MIPS_PHYS_TO_KSEG1(sc->sc_addr + 0x2d0 + (0x10 * chan)); 316 #endif 317 318 ch->ch_i_dcd = ch->ch_i_dcd_pin = 0 /* XXXCGD */; 319 ch->ch_i_cts = ch->ch_i_cts_pin = 0 /* XXXCGD */; 320 ch->ch_i_dsr = ch->ch_i_dsr_pin = 0 /* XXXCGD */; 321 ch->ch_i_ri = ch->ch_i_ri_pin = 0 /* XXXCGD */; 322 ch->ch_i_mask = 323 ch->ch_i_dcd | ch->ch_i_cts | ch->ch_i_dsr | ch->ch_i_ri; 324 ch->ch_o_dtr = ch->ch_o_dtr_pin = 0 /* XXXCGD */; 325 ch->ch_o_rts = ch->ch_o_rts_pin = 0 /* XXXCGD */; 326 ch->ch_o_mask = ch->ch_o_dtr | ch->ch_o_rts; 327 328 ch->ch_intrhand = cpu_intr_establish(intr, IPL_SERIAL, sbscn_intr, ch); 329 callout_init(&ch->ch_diag_callout, 0); 330 331 /* Disable interrupts before configuring the device. */ 332 ch->ch_imr = 0; 333 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 334 335 if (sbscn_cons_present && 336 sbscn_cons_addr == chan_addr && sbscn_cons_chan == chan) { 337 sbscn_cons_attached = 1; 338 339 /* Make sure the console is always "hardwired". */ 340 delay(1000); /* wait for output to finish */ 341 SET(ch->ch_hwflags, SBSCN_HW_CONSOLE); 342 SET(ch->ch_swflags, TIOCFLAG_SOFTCAR); 343 } 344 345 tp = ttymalloc(); 346 tp->t_oproc = sbscn_start; 347 tp->t_param = sbscn_param; 348 tp->t_hwiflow = sbscn_hwiflow; 349 350 ch->ch_tty = tp; 351 ch->ch_rbuf = malloc(sbscn_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 352 if (ch->ch_rbuf == NULL) { 353 printf("%s: channel %d: unable to allocate ring buffer\n", 354 sc->sc_dev.dv_xname, chan); 355 return; 356 } 357 ch->ch_ebuf = ch->ch_rbuf + (sbscn_rbuf_size << 1); 358 359 tty_attach(tp); 360 361 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) { 362 int maj; 363 364 /* locate the major number */ 365 maj = cdevsw_lookup_major(&sbscn_cdevsw); 366 367 cn_tab->cn_dev = makedev(maj, 368 (device_unit(&sc->sc_dev) << 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 *, const char *); 427 428 int sbscn_debug = 0 /* XXXCGD */; 429 430 void 431 sbscn_status(struct sbscn_channel *ch, const 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 lwp *l) 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 (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 574 return (EBUSY); 575 576 s = spltty(); 577 578 /* 579 * Do the following iff this is a first open. 580 */ 581 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 582 struct termios t; 583 584 tp->t_dev = dev; 585 586 s2 = splserial(); 587 588 /* Turn on receive, break, and status change interrupts. */ 589 #if 0 /* DO NOT turn on break or status change interrupt at this time. */ 590 ch->ch_imr = 0xe; 591 #else 592 ch->ch_imr = 0x2; 593 #endif 594 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 595 596 /* Fetch the current modem control status, needed later. */ 597 ch->ch_iports = GET_INPUT_SIGNALS(ch); 598 ch->ch_iports_delta = 0; 599 splx(s2); 600 601 /* 602 * Initialize the termios status to the defaults. Add in the 603 * sticky bits from TIOCSFLAGS. 604 */ 605 t.c_ispeed = 0; 606 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) { 607 t.c_ospeed = sbscn_cons_rate; 608 t.c_cflag = sbscn_cons_cflag; 609 } else { 610 t.c_ospeed = TTYDEF_SPEED; 611 t.c_cflag = TTYDEF_CFLAG; 612 } 613 if (ISSET(ch->ch_swflags, TIOCFLAG_CLOCAL)) 614 SET(t.c_cflag, CLOCAL); 615 if (ISSET(ch->ch_swflags, TIOCFLAG_CRTSCTS)) 616 SET(t.c_cflag, CRTSCTS); 617 if (ISSET(ch->ch_swflags, TIOCFLAG_MDMBUF)) 618 SET(t.c_cflag, MDMBUF); 619 /* Make sure sbscn_param() will do something. */ 620 tp->t_ospeed = 0; 621 (void) sbscn_param(tp, &t); 622 tp->t_iflag = TTYDEF_IFLAG; 623 tp->t_oflag = TTYDEF_OFLAG; 624 tp->t_lflag = TTYDEF_LFLAG; 625 ttychars(tp); 626 ttsetwater(tp); 627 628 s2 = splserial(); 629 630 /* 631 * Turn on DTR. We must always do this, even if carrier is not 632 * present, because otherwise we'd have to use TIOCSDTR 633 * immediately after setting CLOCAL, which applications do not 634 * expect. We always assert DTR while the device is open 635 * unless explicitly requested to deassert it. 636 */ 637 sbscn_modem(ch, 1); 638 639 /* Clear the input ring, and unblock. */ 640 ch->ch_rbput = ch->ch_rbget = ch->ch_rbuf; 641 ch->ch_rbavail = sbscn_rbuf_size; 642 sbscn_iflush(ch); 643 CLR(ch->ch_rx_flags, RX_ANY_BLOCK); 644 sbscn_dohwiflow(ch); 645 646 #ifdef SBSCN_DEBUG 647 if (sbscn_debug) 648 sbscn_status(ch, "sbscnopen "); 649 #endif 650 651 splx(s2); 652 } 653 654 splx(s); 655 656 error = ttyopen(tp, SBSCN_DIALOUT(dev), ISSET(flag, O_NONBLOCK)); 657 if (error) 658 goto bad; 659 660 error = (*tp->t_linesw->l_open)(dev, tp); 661 if (error) 662 goto bad; 663 664 return (0); 665 666 bad: 667 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 668 /* 669 * We failed to open the device, and nobody else had it opened. 670 * Clean up the state as appropriate. 671 */ 672 sbscn_shutdown(ch); 673 } 674 675 return (error); 676 } 677 678 int 679 sbscnclose(dev_t dev, int flag, int mode, struct lwp *l) 680 { 681 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 682 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 683 struct tty *tp = ch->ch_tty; 684 685 /* XXX This is for cons.c. */ 686 if (!ISSET(tp->t_state, TS_ISOPEN)) 687 return (0); 688 689 (*tp->t_linesw->l_close)(tp, flag); 690 ttyclose(tp); 691 692 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 693 /* 694 * Although we got a last close, the device may still be in 695 * use; e.g. if this was the dialout node, and there are still 696 * processes waiting for carrier on the non-dialout node. 697 */ 698 sbscn_shutdown(ch); 699 } 700 701 return (0); 702 } 703 704 int 705 sbscnread(dev_t dev, struct uio *uio, int flag) 706 { 707 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 708 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 709 struct tty *tp = ch->ch_tty; 710 711 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 712 } 713 714 int 715 sbscnwrite(dev_t dev, struct uio *uio, int flag) 716 { 717 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 718 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 719 struct tty *tp = ch->ch_tty; 720 721 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 722 } 723 724 int 725 sbscnpoll(dev_t dev, int events, struct lwp *l) 726 { 727 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 728 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 729 struct tty *tp = ch->ch_tty; 730 731 return ((*tp->t_linesw->l_poll)(tp, events, l)); 732 } 733 734 struct tty * 735 sbscntty(dev_t dev) 736 { 737 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 738 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 739 struct tty *tp = ch->ch_tty; 740 741 return (tp); 742 } 743 744 int 745 sbscnioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 746 { 747 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(dev)]; 748 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(dev)]; 749 struct tty *tp = ch->ch_tty; 750 int error; 751 int s; 752 753 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 754 if (error != EPASSTHROUGH) 755 return (error); 756 757 error = ttioctl(tp, cmd, data, flag, l); 758 if (error != EPASSTHROUGH) 759 return (error); 760 761 error = 0; 762 763 s = splserial(); 764 765 switch (cmd) { 766 case TIOCSBRK: 767 sbscn_break(ch, 1); 768 break; 769 770 case TIOCCBRK: 771 sbscn_break(ch, 0); 772 break; 773 774 case TIOCSDTR: 775 sbscn_modem(ch, 1); 776 break; 777 778 case TIOCCDTR: 779 sbscn_modem(ch, 0); 780 break; 781 782 case TIOCGFLAGS: 783 *(int *)data = ch->ch_swflags; 784 break; 785 786 case TIOCSFLAGS: 787 error = kauth_authorize_device_tty(l->l_cred, 788 KAUTH_DEVICE_TTY_PRIVSET, tp); 789 if (error) 790 break; 791 ch->ch_swflags = *(int *)data; 792 break; 793 794 case TIOCMSET: 795 case TIOCMBIS: 796 case TIOCMBIC: 797 tiocm_to_sbscn(ch, cmd, *(int *)data); 798 break; 799 800 case TIOCMGET: 801 *(int *)data = sbscn_to_tiocm(ch); 802 break; 803 804 default: 805 error = EPASSTHROUGH; 806 break; 807 } 808 809 splx(s); 810 811 #ifdef SBSCN_DEBUG 812 if (sbscn_debug) 813 sbscn_status(ch, "sbscn_ioctl "); 814 #endif 815 816 return (error); 817 } 818 819 integrate void 820 sbscn_schedrx(struct sbscn_channel *ch) 821 { 822 823 ch->ch_rx_ready = 1; 824 825 /* Wake up the poller. */ 826 softintr_schedule(ch->ch_si); 827 } 828 829 void 830 sbscn_break(struct sbscn_channel *ch, int onoff) 831 { 832 833 /* XXXCGD delay break until not busy */ 834 if (onoff) 835 WRITE_REG(ch->ch_base + 0x50, 0x60); 836 else 837 WRITE_REG(ch->ch_base + 0x50, 0x70); 838 839 #if 0 840 if (!ch->ch_heldchange) { 841 if (ch->ch_tx_busy) { 842 ch->ch_heldtbc = ch->ch_tbc; 843 ch->ch_tbc = 0; 844 ch->ch_heldchange = 1; 845 } else 846 sbscn_loadchannelregs(ch); 847 } 848 #endif 849 } 850 851 void 852 sbscn_modem(struct sbscn_channel *ch, int onoff) 853 { 854 855 if (ch->ch_o_dtr == 0) 856 return; 857 858 if (onoff) 859 SET(ch->ch_oports, ch->ch_o_dtr); 860 else 861 CLR(ch->ch_oports, ch->ch_o_dtr); 862 863 if (!ch->ch_heldchange) { 864 if (ch->ch_tx_busy) { 865 ch->ch_heldtbc = ch->ch_tbc; 866 ch->ch_tbc = 0; 867 ch->ch_heldchange = 1; 868 } else 869 sbscn_loadchannelregs(ch); 870 } 871 } 872 873 void 874 tiocm_to_sbscn(struct sbscn_channel *ch, int how, int ttybits) 875 { 876 u_char bits; 877 878 bits = 0; 879 if (ISSET(ttybits, TIOCM_DTR)) 880 SET(bits, ch->ch_o_dtr); 881 if (ISSET(ttybits, TIOCM_RTS)) 882 SET(bits, ch->ch_o_rts); 883 884 switch (how) { 885 case TIOCMBIC: 886 CLR(ch->ch_oports, bits); 887 break; 888 889 case TIOCMBIS: 890 SET(ch->ch_oports, bits); 891 break; 892 893 case TIOCMSET: 894 ch->ch_oports = bits; 895 break; 896 } 897 898 if (!ch->ch_heldchange) { 899 if (ch->ch_tx_busy) { 900 ch->ch_heldtbc = ch->ch_tbc; 901 ch->ch_tbc = 0; 902 ch->ch_heldchange = 1; 903 } else 904 sbscn_loadchannelregs(ch); 905 } 906 } 907 908 int 909 sbscn_to_tiocm(struct sbscn_channel *ch) 910 { 911 u_char hwbits; 912 int ttybits = 0; 913 914 hwbits = ch->ch_oports; 915 if (ISSET(hwbits, ch->ch_o_dtr)) 916 SET(ttybits, TIOCM_DTR); 917 if (ISSET(hwbits, ch->ch_o_rts)) 918 SET(ttybits, TIOCM_RTS); 919 920 hwbits = ch->ch_iports; 921 if (ISSET(hwbits, ch->ch_i_dcd)) 922 SET(ttybits, TIOCM_CD); 923 if (ISSET(hwbits, ch->ch_i_cts)) 924 SET(ttybits, TIOCM_CTS); 925 if (ISSET(hwbits, ch->ch_i_dsr)) 926 SET(ttybits, TIOCM_DSR); 927 if (ISSET(hwbits, ch->ch_i_ri)) 928 SET(ttybits, TIOCM_RI); 929 930 if (ch->ch_imr != 0) 931 SET(ttybits, TIOCM_LE); 932 933 return (ttybits); 934 } 935 936 static int 937 cflag2modes(cflag, mode1p, mode2p) 938 tcflag_t cflag; 939 u_char *mode1p; 940 u_char *mode2p; 941 { 942 u_char mode1; 943 u_char mode2; 944 int err = 0; 945 946 mode1 = mode2 = 0; 947 948 switch (ISSET(cflag, CSIZE)) { 949 case CS7: 950 mode1 |= 2; /* XXX */ 951 break; 952 default: 953 err = -1; 954 /* FALLTHRU for sanity */ 955 case CS8: 956 mode1 |= 3; /* XXX */ 957 break; 958 } 959 if (!ISSET(cflag, PARENB)) 960 mode1 |= 2 << 3; 961 else { 962 mode1 |= 0 << 3; 963 if (ISSET(cflag, PARODD)) 964 mode1 |= 1 << 2; 965 } 966 967 if (ISSET(cflag, CSTOPB)) 968 mode2 |= 1 << 3; /* two stop bits XXX not std */ 969 970 if (ISSET(cflag, CRTSCTS)) { 971 mode1 |= 1 << 7; 972 mode2 |= 1 << 4; 973 } 974 975 *mode1p = mode1; 976 *mode2p = mode2; 977 return (err); 978 } 979 980 int 981 sbscn_param(struct tty *tp, struct termios *t) 982 { 983 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(tp->t_dev)]; 984 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(tp->t_dev)]; 985 long brc; 986 u_char mode1, mode2; 987 int s; 988 989 /* XXX reset to console parameters if console? */ 990 #if 0 991 XXX disable, enable. 992 #endif 993 994 /* Check requested parameters. */ 995 if (sbscn_speed(t->c_ospeed, &brc) < 0) 996 return (EINVAL); 997 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 998 return (EINVAL); 999 1000 /* 1001 * For the console, always force CLOCAL and !HUPCL, so that the port 1002 * is always active. 1003 */ 1004 if (ISSET(ch->ch_swflags, TIOCFLAG_SOFTCAR) || 1005 ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) { 1006 SET(t->c_cflag, CLOCAL); 1007 CLR(t->c_cflag, HUPCL); 1008 } 1009 1010 /* 1011 * If there were no changes, don't do anything. This avoids dropping 1012 * input and improves performance when all we did was frob things like 1013 * VMIN and VTIME. 1014 */ 1015 if (tp->t_ospeed == t->c_ospeed && 1016 tp->t_cflag == t->c_cflag) 1017 return (0); 1018 1019 if (cflag2modes(t->c_cflag, &mode1, &mode2) < 0) 1020 return (EINVAL); 1021 1022 s = splserial(); 1023 1024 ch->ch_mode1 = mode1; 1025 ch->ch_mode2 = mode2; 1026 1027 /* 1028 * If we're not in a mode that assumes a connection is present, then 1029 * ignore carrier changes. 1030 */ 1031 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 1032 ch->ch_i_dcd = 0; 1033 else 1034 ch->ch_i_dcd = ch->ch_i_dcd_pin; 1035 /* 1036 * Set the flow control pins depending on the current flow control 1037 * mode. 1038 */ 1039 if (ISSET(t->c_cflag, CRTSCTS)) { 1040 ch->ch_o_dtr = ch->ch_o_dtr_pin; 1041 ch->ch_o_rts = ch->ch_o_rts_pin; 1042 ch->ch_i_cts = ch->ch_i_cts_pin; 1043 /* hw controle enable bits in mod regs set by cflag2modes */ 1044 } else if (ISSET(t->c_cflag, MDMBUF)) { 1045 /* 1046 * For DTR/DCD flow control, make sure we don't toggle DTR for 1047 * carrier detection. 1048 */ 1049 ch->ch_o_dtr = 0; 1050 ch->ch_o_rts = ch->ch_o_dtr_pin; 1051 ch->ch_i_cts = ch->ch_i_dcd_pin; 1052 } else { 1053 /* 1054 * If no flow control, then always set RTS. This will make 1055 * the other side happy if it mistakenly thinks we're doing 1056 * RTS/CTS flow control. 1057 */ 1058 ch->ch_o_dtr = ch->ch_o_dtr_pin | ch->ch_o_rts_pin; 1059 ch->ch_o_rts = 0; 1060 ch->ch_i_cts = 0; 1061 if (ISSET(ch->ch_oports, ch->ch_o_dtr_pin)) 1062 SET(ch->ch_oports, ch->ch_o_rts_pin); 1063 else 1064 CLR(ch->ch_oports, ch->ch_o_rts_pin); 1065 } 1066 /* XXX maybe mask the ports which generate intrs? */ 1067 1068 ch->ch_brc = brc; 1069 1070 /* XXX maybe set fifo-full receive mode if RTSCTS and high speed? */ 1071 1072 /* And copy to tty. */ 1073 tp->t_ispeed = 0; 1074 tp->t_ospeed = t->c_ospeed; 1075 tp->t_cflag = t->c_cflag; 1076 1077 if (!ch->ch_heldchange) { 1078 if (ch->ch_tx_busy) { 1079 ch->ch_heldtbc = ch->ch_tbc; 1080 ch->ch_tbc = 0; 1081 ch->ch_heldchange = 1; 1082 } else 1083 sbscn_loadchannelregs(ch); 1084 } 1085 1086 if (!ISSET(t->c_cflag, CHWFLOW)) { 1087 /* Disable the high water mark. */ 1088 ch->ch_r_hiwat = 0; 1089 ch->ch_r_lowat = 0; 1090 if (ISSET(ch->ch_rx_flags, RX_TTY_OVERFLOWED)) { 1091 CLR(ch->ch_rx_flags, RX_TTY_OVERFLOWED); 1092 sbscn_schedrx(ch); 1093 } 1094 if (ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 1095 CLR(ch->ch_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 1096 sbscn_dohwiflow(ch); 1097 } 1098 } else { 1099 ch->ch_r_hiwat = sbscn_rbuf_hiwat; 1100 ch->ch_r_lowat = sbscn_rbuf_lowat; 1101 } 1102 1103 splx(s); 1104 1105 /* 1106 * Update the tty layer's idea of the carrier bit, in case we changed 1107 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1108 * explicit request. 1109 */ 1110 (void) (*tp->t_linesw->l_modem)(tp, 1111 ISSET(ch->ch_iports, ch->ch_i_dcd)); 1112 1113 #ifdef SBSCN_DEBUG 1114 if (sbscn_debug) 1115 sbscn_status(ch, "sbscnparam "); 1116 #endif 1117 1118 if (!ISSET(t->c_cflag, CHWFLOW)) { 1119 if (ch->ch_tx_stopped) { 1120 ch->ch_tx_stopped = 0; 1121 sbscn_start(tp); 1122 } 1123 } 1124 1125 return (0); 1126 } 1127 1128 void 1129 sbscn_iflush(struct sbscn_channel *ch) 1130 { 1131 #ifdef DIAGNOSTIC 1132 int reg; 1133 #endif 1134 int timo; 1135 1136 #ifdef DIAGNOSTIC 1137 reg = 0xffff; 1138 #endif 1139 timo = 50000; 1140 /* flush any pending I/O */ 1141 while (ISSET(READ_REG(ch->ch_base + 0x20), 0x01) 1142 && --timo) 1143 #ifdef DIAGNOSTIC 1144 reg = 1145 #else 1146 (void) 1147 #endif 1148 READ_REG(ch->ch_base + 0x60); 1149 #ifdef DIAGNOSTIC 1150 if (!timo) 1151 printf("%s: sbscn_iflush timeout %02x\n", 1152 ch->ch_sc->sc_dev.dv_xname, reg & 0xff); 1153 #endif 1154 } 1155 1156 void 1157 sbscn_loadchannelregs(struct sbscn_channel *ch) 1158 { 1159 1160 /* XXXXX necessary? */ 1161 sbscn_iflush(ch); 1162 1163 WRITE_REG(ch->ch_imr_base, 0); 1164 1165 // XXX disable? 1166 WRITE_REG(ch->ch_base + 0x00, ch->ch_mode1); 1167 WRITE_REG(ch->ch_base + 0x10, ch->ch_mode2); 1168 WRITE_REG(ch->ch_base + 0x30, ch->ch_brc); 1169 1170 ch->ch_oports_active = ch->ch_oports; 1171 SET_OUTPUT_SIGNALS(ch, ch->ch_oports_active); 1172 1173 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1174 } 1175 1176 int 1177 sbscn_hwiflow(struct tty *tp, int block) 1178 { 1179 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(tp->t_dev)]; 1180 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(tp->t_dev)]; 1181 int s; 1182 1183 if (ch->ch_o_rts == 0) 1184 return (0); 1185 1186 s = splserial(); 1187 if (block) { 1188 if (!ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED)) { 1189 SET(ch->ch_rx_flags, RX_TTY_BLOCKED); 1190 sbscn_dohwiflow(ch); 1191 } 1192 } else { 1193 if (ISSET(ch->ch_rx_flags, RX_TTY_OVERFLOWED)) { 1194 CLR(ch->ch_rx_flags, RX_TTY_OVERFLOWED); 1195 sbscn_schedrx(ch); 1196 } 1197 if (ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED)) { 1198 CLR(ch->ch_rx_flags, RX_TTY_BLOCKED); 1199 sbscn_dohwiflow(ch); 1200 } 1201 } 1202 splx(s); 1203 return (1); 1204 } 1205 1206 /* 1207 * (un)block input via hw flowcontrol 1208 */ 1209 void 1210 sbscn_dohwiflow(struct sbscn_channel *ch) 1211 { 1212 1213 if (ch->ch_o_rts == 0) 1214 return; 1215 1216 if (ISSET(ch->ch_rx_flags, RX_ANY_BLOCK)) { 1217 CLR(ch->ch_oports, ch->ch_o_rts); 1218 CLR(ch->ch_oports_active, ch->ch_o_rts); 1219 } else { 1220 SET(ch->ch_oports, ch->ch_o_rts); 1221 SET(ch->ch_oports_active, ch->ch_o_rts); 1222 } 1223 SET_OUTPUT_SIGNALS(ch, ch->ch_oports_active); 1224 } 1225 1226 void 1227 sbscn_start(struct tty *tp) 1228 { 1229 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(tp->t_dev)]; 1230 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(tp->t_dev)]; 1231 int s; 1232 1233 s = spltty(); 1234 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1235 goto out; 1236 if (ch->ch_tx_stopped) 1237 goto out; 1238 if (!ttypull(tp)) 1239 goto out; 1240 1241 /* Grab the first contiguous region of buffer space. */ 1242 { 1243 u_char *tba; 1244 int tbc; 1245 1246 tba = tp->t_outq.c_cf; 1247 tbc = ndqb(&tp->t_outq, 0); 1248 1249 (void)splserial(); 1250 1251 ch->ch_tba = tba; 1252 ch->ch_tbc = tbc; 1253 } 1254 1255 SET(tp->t_state, TS_BUSY); 1256 ch->ch_tx_busy = 1; 1257 1258 /* Enable transmit completion interrupts if necessary. */ 1259 if (!ISSET(ch->ch_imr, 0x1)) { 1260 SET(ch->ch_imr, 0x1); 1261 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1262 } 1263 1264 /* Output the first chunk of the contiguous buffer. */ 1265 { 1266 u_char c; 1267 1268 while (ch->ch_tbc && READ_REG(ch->ch_base + 0x20) & 0x04) { 1269 c = *ch->ch_tba++; 1270 ch->ch_tbc--; 1271 WRITE_REG(ch->ch_base + 0x70, c); 1272 } 1273 } 1274 out: 1275 splx(s); 1276 return; 1277 } 1278 1279 /* 1280 * Stop output on a line. 1281 */ 1282 void 1283 sbscnstop(struct tty *tp, int flag) 1284 { 1285 struct sbscn_softc *sc = sbscn_cd.cd_devs[SBSCN_UNIT(tp->t_dev)]; 1286 struct sbscn_channel *ch = &sc->sc_channels[SBSCN_CHAN(tp->t_dev)]; 1287 int s; 1288 1289 s = splserial(); 1290 if (ISSET(tp->t_state, TS_BUSY)) { 1291 /* Stop transmitting at the next chunk. */ 1292 ch->ch_tbc = 0; 1293 ch->ch_heldtbc = 0; 1294 if (!ISSET(tp->t_state, TS_TTSTOP)) 1295 SET(tp->t_state, TS_FLUSH); 1296 } 1297 splx(s); 1298 } 1299 1300 void 1301 sbscn_diag(arg) 1302 void *arg; 1303 { 1304 struct sbscn_channel *ch = arg; 1305 struct sbscn_softc *sc = ch->ch_sc; 1306 int overflows, floods; 1307 int s; 1308 1309 s = splserial(); 1310 overflows = ch->ch_overflows; 1311 ch->ch_overflows = 0; 1312 floods = ch->ch_floods; 1313 ch->ch_floods = 0; 1314 ch->ch_errors = 0; 1315 splx(s); 1316 1317 log(LOG_WARNING, "%s: channel %d: %d fifo overflow%s, %d ibuf flood%s\n", 1318 sc->sc_dev.dv_xname, ch->ch_num, 1319 overflows, overflows == 1 ? "" : "s", 1320 floods, floods == 1 ? "" : "s"); 1321 } 1322 1323 integrate void 1324 sbscn_rxsoft(struct sbscn_channel *ch, struct tty *tp) 1325 { 1326 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1327 u_char *get, *end; 1328 u_int cc, scc; 1329 u_char sr; 1330 int code; 1331 int s; 1332 1333 end = ch->ch_ebuf; 1334 get = ch->ch_rbget; 1335 scc = cc = sbscn_rbuf_size - ch->ch_rbavail; 1336 1337 if (cc == sbscn_rbuf_size) { 1338 ch->ch_floods++; 1339 if (ch->ch_errors++ == 0) 1340 callout_reset(&ch->ch_diag_callout, 60 * hz, 1341 sbscn_diag, ch); 1342 } 1343 1344 while (cc) { 1345 code = get[0]; 1346 sr = get[1]; 1347 if (ISSET(sr, 0xf0)) { 1348 if (ISSET(sr, 0x10)) { 1349 ch->ch_overflows++; 1350 if (ch->ch_errors++ == 0) 1351 callout_reset(&ch->ch_diag_callout, 1352 60 * hz, sbscn_diag, ch); 1353 } 1354 if (ISSET(sr, 0xc0)) 1355 SET(code, TTY_FE); 1356 if (ISSET(sr, 0x20)) 1357 SET(code, TTY_PE); 1358 } 1359 if ((*rint)(code, tp) == -1) { 1360 /* 1361 * The line discipline's buffer is out of space. 1362 */ 1363 if (!ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED)) { 1364 /* 1365 * We're either not using flow control, or the 1366 * line discipline didn't tell us to block for 1367 * some reason. Either way, we have no way to 1368 * know when there's more space available, so 1369 * just drop the rest of the data. 1370 */ 1371 get += cc << 1; 1372 if (get >= end) 1373 get -= sbscn_rbuf_size << 1; 1374 cc = 0; 1375 } else { 1376 /* 1377 * Don't schedule any more receive processing 1378 * until the line discipline tells us there's 1379 * space available (through comhwiflow()). 1380 * Leave the rest of the data in the input 1381 * buffer. 1382 */ 1383 SET(ch->ch_rx_flags, RX_TTY_OVERFLOWED); 1384 } 1385 break; 1386 } 1387 get += 2; 1388 if (get >= end) 1389 get = ch->ch_rbuf; 1390 cc--; 1391 } 1392 1393 if (cc != scc) { 1394 ch->ch_rbget = get; 1395 s = splserial(); 1396 cc = ch->ch_rbavail += scc - cc; 1397 /* Buffers should be ok again, release possible block. */ 1398 if (cc >= ch->ch_r_lowat) { 1399 if (ISSET(ch->ch_rx_flags, RX_IBUF_OVERFLOWED)) { 1400 CLR(ch->ch_rx_flags, RX_IBUF_OVERFLOWED); 1401 SET(ch->ch_imr, 0x02); 1402 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1403 } 1404 if (ISSET(ch->ch_rx_flags, RX_IBUF_BLOCKED)) { 1405 CLR(ch->ch_rx_flags, RX_IBUF_BLOCKED); 1406 sbscn_dohwiflow(ch); 1407 } 1408 } 1409 splx(s); 1410 } 1411 } 1412 1413 integrate void 1414 sbscn_txsoft(struct sbscn_channel *ch, struct tty *tp) 1415 { 1416 1417 CLR(tp->t_state, TS_BUSY); 1418 if (ISSET(tp->t_state, TS_FLUSH)) 1419 CLR(tp->t_state, TS_FLUSH); 1420 else 1421 ndflush(&tp->t_outq, (int)(ch->ch_tba - tp->t_outq.c_cf)); 1422 (*tp->t_linesw->l_start)(tp); 1423 } 1424 1425 integrate void 1426 sbscn_stsoft(struct sbscn_channel *ch, struct tty *tp) 1427 { 1428 u_char iports, delta; 1429 int s; 1430 1431 s = splserial(); 1432 iports = ch->ch_iports; 1433 delta = ch->ch_iports_delta; 1434 ch->ch_iports_delta = 0; 1435 splx(s); 1436 1437 if (ISSET(delta, ch->ch_i_dcd)) { 1438 /* 1439 * Inform the tty layer that carrier detect changed. 1440 */ 1441 (void) (*tp->t_linesw->l_modem)(tp, 1442 ISSET(iports, ch->ch_i_dcd)); 1443 } 1444 1445 if (ISSET(delta, ch->ch_i_cts)) { 1446 /* Block or unblock output according to flow control. */ 1447 if (ISSET(iports, ch->ch_i_cts)) { 1448 ch->ch_tx_stopped = 0; 1449 (*tp->t_linesw->l_start)(tp); 1450 } else { 1451 ch->ch_tx_stopped = 1; 1452 } 1453 } 1454 1455 #ifdef SBSCN_DEBUG 1456 if (sbscn_debug) 1457 sbscn_status(ch, "sbscn_stsoft"); 1458 #endif 1459 } 1460 1461 void 1462 sbscn_soft(void *arg) 1463 { 1464 struct sbscn_channel *ch = arg; 1465 struct tty *tp = ch->ch_tty; 1466 1467 if (ch->ch_rx_ready) { 1468 ch->ch_rx_ready = 0; 1469 sbscn_rxsoft(ch, tp); 1470 } 1471 1472 if (ch->ch_st_check) { 1473 ch->ch_st_check = 0; 1474 sbscn_stsoft(ch, tp); 1475 } 1476 1477 if (ch->ch_tx_done) { 1478 ch->ch_tx_done = 0; 1479 sbscn_txsoft(ch, tp); 1480 } 1481 } 1482 1483 void 1484 sbscn_intr(void *arg, uint32_t status, uint32_t pc) 1485 { 1486 struct sbscn_channel *ch = arg; 1487 u_char *put, *end; 1488 u_int cc; 1489 u_char isr, sr; 1490 1491 /* read ISR */ 1492 isr = READ_REG(ch->ch_isr_base) & ch->ch_imr; 1493 if (isr == 0) 1494 return; 1495 1496 end = ch->ch_ebuf; 1497 put = ch->ch_rbput; 1498 cc = ch->ch_rbavail; 1499 1500 do { 1501 u_char iports, delta; 1502 1503 if (isr & 0x02) { 1504 1505 sr = READ_REG(ch->ch_base + 0x20); 1506 /* XXX sr 0x01 bit must be set at this point */ 1507 1508 #if defined(DDB) || defined(KGDB) 1509 if ((sr & 0x80) == 0x80) { 1510 #ifdef DDB 1511 if (ISSET(ch->ch_hwflags, SBSCN_HW_CONSOLE)) { 1512 (void)READ_REG(ch->ch_base + 0x60); 1513 console_debugger(); 1514 continue; 1515 } 1516 #endif 1517 #ifdef KGDB 1518 if (ISSET(ch->ch_hwflags, SBSCN_HW_KGDB)) { 1519 (void)READ_REG(ch->ch_base + 0x60); 1520 kgdb_connect(1); 1521 continue; 1522 } 1523 #endif 1524 } 1525 #endif /* DDB || KGDB */ 1526 1527 if (!ISSET(ch->ch_rx_flags, RX_IBUF_OVERFLOWED)) { 1528 while (cc > 0) { 1529 put[0] = READ_REG(ch->ch_base + 0x60); 1530 put[1] = sr; 1531 put += 2; 1532 if (put >= end) 1533 put = ch->ch_rbuf; 1534 cc--; 1535 1536 sr = READ_REG(ch->ch_base + 0x20); 1537 if (!ISSET(sr, 0x02)) 1538 break; 1539 } 1540 1541 /* 1542 * Current string of incoming characters ended 1543 * because no more data was available or we 1544 * ran out of space. Schedule a receive event 1545 * if any data was received. If we're out of 1546 * space, turn off receive interrupts. 1547 */ 1548 ch->ch_rbput = put; 1549 ch->ch_rbavail = cc; 1550 if (!ISSET(ch->ch_rx_flags, RX_TTY_OVERFLOWED)) 1551 ch->ch_rx_ready = 1; 1552 1553 /* 1554 * See if we are in danger of overflowing a 1555 * buffer. If so, use hardware flow control 1556 * to ease the pressure. 1557 */ 1558 if (!ISSET(ch->ch_rx_flags, RX_IBUF_BLOCKED) && 1559 cc < ch->ch_r_hiwat) { 1560 SET(ch->ch_rx_flags, RX_IBUF_BLOCKED); 1561 sbscn_dohwiflow(ch); 1562 } 1563 1564 /* 1565 * If we're out of space, disable receive 1566 * interrupts until the queue has drained 1567 * a bit. 1568 */ 1569 if (!cc) { 1570 SET(ch->ch_rx_flags, 1571 RX_IBUF_OVERFLOWED); 1572 CLR(ch->ch_imr, 0x02); 1573 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1574 } 1575 } else { 1576 /* XXX panic? */ 1577 CLR(ch->ch_imr, 0x02); 1578 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1579 continue; 1580 } 1581 } 1582 1583 if (isr & 0x01) { 1584 CLR(ch->ch_imr, 0x01); 1585 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1586 } 1587 1588 #if 0 1589 XXX 1590 if (isr & 0x08) { 1591 clear input signal change! 1592 } 1593 #endif 1594 iports = GET_INPUT_SIGNALS(ch); 1595 delta = iports ^ ch->ch_iports; 1596 ch->ch_iports = iports; 1597 1598 /* 1599 * Process normal status changes 1600 */ 1601 if (ISSET(delta, ch->ch_i_mask)) { 1602 SET(ch->ch_iports_delta, delta); 1603 1604 /* 1605 * Stop output immediately if we lose the output 1606 * flow control signal or carrier detect. 1607 */ 1608 if (ISSET(~iports, ch->ch_i_mask)) { 1609 ch->ch_tbc = 0; 1610 ch->ch_heldtbc = 0; 1611 #ifdef SBSCN_DEBUG 1612 if (sbscn_debug) 1613 sbscn_status(ch, "sbscn_intr "); 1614 #endif 1615 } 1616 1617 ch->ch_st_check = 1; 1618 } 1619 } while ((isr = (READ_REG(ch->ch_isr_base) & ch->ch_imr)) != 0); 1620 1621 /* 1622 * Done handling any receive interrupts and status changes, and 1623 * clearing the tx-ready interrupt if it was set. See if data can 1624 * be transmitted as well. Schedule tx done event if no data left 1625 * and tty was marked busy. 1626 */ 1627 sr = READ_REG(ch->ch_base + 0x20); 1628 if (ISSET(sr, 0x4)) { 1629 1630 /* 1631 * If we've delayed a parameter change, do it now, and restart 1632 * output. 1633 */ 1634 if (ch->ch_heldchange) { 1635 sbscn_loadchannelregs(ch); 1636 ch->ch_heldchange = 0; 1637 ch->ch_tbc = ch->ch_heldtbc; 1638 ch->ch_heldtbc = 0; 1639 } 1640 1641 /* Output the next chunk of the contiguous buffer, if any. */ 1642 if (ch->ch_tbc > 0) { 1643 int wrote1; 1644 u_char c; 1645 1646 wrote1 = 0; 1647 while (ch->ch_tbc && 1648 READ_REG(ch->ch_base + 0x20) & 0x04) { 1649 wrote1 = 1; 1650 c = *ch->ch_tba++; 1651 ch->ch_tbc--; 1652 WRITE_REG(ch->ch_base + 0x70, c); 1653 } 1654 if (wrote1) { 1655 SET(ch->ch_imr, 0x01); 1656 WRITE_REG(ch->ch_imr_base, ch->ch_imr); 1657 } 1658 } else { 1659 /* 1660 * transmit completion interrupts already disabled, 1661 * mark the channel tx state as done. 1662 */ 1663 if (ch->ch_tx_busy) { 1664 ch->ch_tx_busy = 0; 1665 ch->ch_tx_done = 1; 1666 } 1667 } 1668 } 1669 1670 /* Wake up the poller. */ 1671 softintr_schedule(ch->ch_si); 1672 1673 #if NRND > 0 && defined(RND_SBSCN) 1674 rnd_add_uint32(&ch->ch_rnd_source, isr | sr); 1675 #endif 1676 } 1677 1678 /* 1679 * The following functions are polled getc and putc routines, shared 1680 * by the console and kgdb glue. 1681 */ 1682 1683 int 1684 sbscn_common_getc(u_long addr, int chan) 1685 { 1686 int s = splhigh(); 1687 u_long base = MIPS_PHYS_TO_KSEG1(addr + (chan * 0x100)); 1688 int c; 1689 1690 /* block until a character becomes available */ 1691 while ((READ_REG(base + 0x20) & 0x01) == 0) 1692 continue; 1693 1694 c = READ_REG(base + 0x60) & 0xff; 1695 splx(s); 1696 return (c); 1697 } 1698 1699 void 1700 sbscn_common_putc(u_long addr, int chan, int c) 1701 { 1702 int s = splhigh(); 1703 int timo; 1704 u_long base = MIPS_PHYS_TO_KSEG1(addr + (chan * 0x100)); 1705 1706 /* wait for any pending transmission to finish */ 1707 timo = 1500000; 1708 while ((READ_REG(base + 0x20) & 0x08) == 0 && --timo) 1709 continue; 1710 1711 WRITE_REG(base + 0x70, c); 1712 1713 /* wait for this transmission to complete */ 1714 timo = 15000000; 1715 while ((READ_REG(base + 0x20) & 0x08) == 0 && --timo) 1716 continue; 1717 1718 splx(s); 1719 } 1720 1721 /* 1722 * Initialize UART for use as console or KGDB line. 1723 */ 1724 int 1725 sbscn_init(u_long addr, int chan, int rate, tcflag_t cflag) 1726 { 1727 #if 1 1728 u_long chanregbase = MIPS_PHYS_TO_KSEG1(addr + (chan * 0x100)); 1729 u_long imaskreg = MIPS_PHYS_TO_KSEG1(addr + 0x230 + (chan * 0x20)); 1730 u_char mode1, mode2; 1731 u_long brc; 1732 volatile int timo; 1733 1734 WRITE_REG(imaskreg, 0); /* disable channel intrs */ 1735 1736 /* XXX should we really do the following? how about only if enabled? */ 1737 /* wait for any pending transmission to finish */ 1738 timo = 1500000; 1739 while ((READ_REG(chanregbase + 0x20) & 0x08) == 0 && --timo) 1740 continue; 1741 1742 /* XXX: wait a little. THIS SHOULD NOT BE NECESSARY!!! (?) */ 1743 timo = 1500000; 1744 while (--timo) 1745 ; 1746 1747 WRITE_REG(chanregbase + 0x50, 2 << 4); /* reset receiver */ 1748 WRITE_REG(chanregbase + 0x50, 3 << 4); /* reset transmitter */ 1749 1750 /* set up the line for use */ 1751 (void)cflag2modes(cflag, &mode1, &mode2); 1752 (void)sbscn_speed(rate, &brc); 1753 WRITE_REG(chanregbase + 0x00, mode1); 1754 WRITE_REG(chanregbase + 0x10, mode2); 1755 WRITE_REG(chanregbase + 0x30, brc); 1756 1757 /* enable transmit and receive */ 1758 #define M_DUART_RX_EN 0x01 1759 #define M_DUART_TX_EN 0x04 1760 WRITE_REG(chanregbase + 0x50,M_DUART_RX_EN | M_DUART_TX_EN); 1761 #endif 1762 1763 /* XXX: wait a little. THIS SHOULD NOT BE NECESSARY!!! (?) */ 1764 timo = 1500000; 1765 while (--timo) 1766 ; 1767 1768 #if 0 /* XXXCGD */ 1769 bus_space_handle_t ioh; 1770 1771 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) 1772 return (ENOMEM); /* ??? */ 1773 1774 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 1775 bus_space_write_1(iot, ioh, com_efr, 0); 1776 bus_space_write_1(iot, ioh, com_lcr, LCR_DLAB); 1777 rate = comspeed(rate, frequency); 1778 bus_space_write_1(iot, ioh, com_dlbl, rate); 1779 bus_space_write_1(iot, ioh, com_dlbh, rate >> 8); 1780 bus_space_write_1(iot, ioh, com_lcr, cflag2lcr(cflag)); 1781 bus_space_write_1(iot, ioh, com_mcr, MCR_DTR | MCR_RTS); 1782 bus_space_write_1(iot, ioh, com_fifo, 1783 FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1); 1784 bus_space_write_1(iot, ioh, com_ier, 0); 1785 1786 *iohp = ioh; 1787 return (0); 1788 #endif /* XXXCGD */ 1789 /* XXXCGD */ 1790 return (0); 1791 } 1792 1793 /* 1794 * Following are all routines needed for sbscn to act as console 1795 */ 1796 int 1797 sbscn_cnattach(u_long addr, int chan, int rate, tcflag_t cflag) 1798 { 1799 int res; 1800 static struct consdev sbscn_cons = { 1801 NULL, NULL, sbscn_cngetc, sbscn_cnputc, sbscn_cnpollc, NULL, 1802 NULL, NULL, NODEV, CN_NORMAL 1803 }; 1804 1805 res = sbscn_init(addr, chan, rate, cflag); 1806 if (res) 1807 return (res); 1808 1809 cn_tab = &sbscn_cons; 1810 1811 sbscn_cons_present = 1; 1812 sbscn_cons_addr = addr; 1813 sbscn_cons_chan = chan; 1814 sbscn_cons_rate = rate; 1815 sbscn_cons_cflag = cflag; 1816 1817 return (0); 1818 } 1819 1820 int 1821 sbscn_cngetc(dev_t dev) 1822 { 1823 1824 return (sbscn_common_getc(sbscn_cons_addr, sbscn_cons_chan)); 1825 } 1826 1827 /* 1828 * Console kernel output character routine. 1829 */ 1830 void 1831 sbscn_cnputc(dev_t dev, int c) 1832 { 1833 1834 sbscn_common_putc(sbscn_cons_addr, sbscn_cons_chan, c); 1835 } 1836 1837 void 1838 sbscn_cnpollc(dev_t dev, int on) 1839 { 1840 1841 } 1842 1843 #ifdef KGDB 1844 int 1845 sbscn_kgdb_attach(u_long addr, int chan, int rate, tcflag_t cflag) 1846 { 1847 int res; 1848 1849 if (!sbscn_cons_present && 1850 sbscn_cons_addr == addr && sbscn_cons_chan == chan) 1851 return (EBUSY); /* cannot share with console */ 1852 1853 res = sbscn_init(addr, chan, rate, cflag); 1854 if (res) 1855 return (res); 1856 1857 kgdb_attach(sbscn_kgdb_getc, sbscn_kgdb_putc, NULL); 1858 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 1859 1860 sbscn_kgdb_present = 1; 1861 sbscn_kgdb_addr = addr; 1862 sbscn_kgdb_chan = chan; 1863 1864 return (0); 1865 } 1866 1867 /* ARGSUSED */ 1868 int 1869 sbscn_kgdb_getc(arg) 1870 void *arg; 1871 { 1872 1873 return (sbscn_common_getc(sbscn_kgdb_addr, sbscn_kgdb_chan)); 1874 } 1875 1876 /* ARGSUSED */ 1877 void 1878 sbscn_kgdb_putc(arg, c) 1879 void *arg; 1880 int c; 1881 { 1882 1883 sbscn_common_getc(sbscn_kgdb_addr, sbscn_kgdb_chan, c); 1884 } 1885 #endif /* KGDB */ 1886 1887 /* 1888 * helper function to identify the sbscn channels used by 1889 * console or KGDB (and not yet autoconf attached) 1890 */ 1891 int 1892 sbscn_is_console(u_long addr, int chan) 1893 { 1894 1895 if (sbscn_cons_present && !sbscn_cons_attached && 1896 sbscn_cons_addr == addr && sbscn_cons_chan == chan) 1897 return (1); 1898 #ifdef KGDB 1899 if (sbscn_kgdb_present && !sbscn_kgdb_attached && 1900 sbscn_kgdb_addr == addr && sbscn_kgdb_chan == chan) 1901 return (1); 1902 #endif 1903 return (0); 1904 } 1905
Indexes created Wed Oct 15 16:09:53 GMT 2025