sbjcn.c revision 1.19
1 /* $NetBSD: sbjcn.c,v 1.19 2007/11/19 18:51:41 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 * `sbjcn' driver, supports console over SiByte SB-1250 JTAG. 106 * 107 * Accesses a section of JTAG memory space to mimic a console, 108 * if there's a matching program outside to communicate with. 109 * If nobody is there, things will be very quiet. 110 */ 111 112 #include <sys/cdefs.h> 113 __KERNEL_RCSID(0, "$NetBSD: sbjcn.c,v 1.19 2007/11/19 18:51:41 ad Exp $"); 114 115 #define SBJCN_DEBUG 116 117 #include "opt_ddb.h" 118 119 #include <sys/param.h> 120 #include <sys/systm.h> 121 #include <sys/ioctl.h> 122 #include <sys/select.h> 123 #include <sys/tty.h> 124 #include <sys/proc.h> 125 #include <sys/user.h> 126 #include <sys/conf.h> 127 #include <sys/file.h> 128 #include <sys/uio.h> 129 #include <sys/kernel.h> 130 #include <sys/syslog.h> 131 #include <sys/types.h> 132 #include <sys/device.h> 133 #include <sys/malloc.h> 134 #include <sys/vnode.h> 135 #include <sys/kauth.h> 136 137 #include <sbmips/dev/sbscd/sbscdvar.h> 138 #include <sbmips/dev/sbscd/sbjcnvar.h> 139 #include <dev/cons.h> 140 #include <machine/locore.h> 141 142 void sbjcn_attach_channel(struct sbjcn_softc *sc, int chan, int intr); 143 static void sbjcncn_grabdword(struct sbjcn_channel *ch); 144 static char sbjcncn_nextbyte(struct sbjcn_channel *ch); 145 static void sbjcn_cngrabdword(void); 146 147 #if defined(DDB) || defined(KGDB) 148 static void sbjcn_enable_debugport(struct sbjcn_channel *ch); 149 #endif 150 void sbjcn_config(struct sbjcn_channel *ch); 151 void sbjcn_shutdown(struct sbjcn_channel *ch); 152 int sbjcn_speed(long, long *); 153 static int cflag2modes(tcflag_t, u_char *, u_char *); 154 int sbjcn_param(struct tty *, struct termios *); 155 void sbjcn_start(struct tty *); 156 int sbjcn_hwiflow(struct tty *, int); 157 158 void sbjcn_loadchannelregs(struct sbjcn_channel *); 159 void sbjcn_dohwiflow(struct sbjcn_channel *); 160 void sbjcn_break(struct sbjcn_channel *, int); 161 void sbjcn_modem(struct sbjcn_channel *, int); 162 void tiocm_to_sbjcn(struct sbjcn_channel *, int, int); 163 int sbjcn_to_tiocm(struct sbjcn_channel *); 164 void sbjcn_iflush(struct sbjcn_channel *); 165 166 int sbjcn_init(u_long addr, int chan, int rate, tcflag_t cflag); 167 int sbjcn_common_getc(u_long addr, int chan); 168 void sbjcn_common_putc(u_long addr, int chan, int c); 169 170 int sbjcn_cngetc(dev_t dev); 171 void sbjcn_cnputc(dev_t dev, int c); 172 void sbjcn_cnpollc(dev_t dev, int on); 173 174 extern struct cfdriver sbjcn_cd; 175 176 dev_type_open(sbjcnopen); 177 dev_type_close(sbjcnclose); 178 dev_type_read(sbjcnread); 179 dev_type_write(sbjcnwrite); 180 dev_type_ioctl(sbjcnioctl); 181 dev_type_stop(sbjcnstop); 182 dev_type_tty(sbjcntty); 183 184 const struct cdevsw sbjcn_cdevsw = { 185 sbjcnopen, sbjcnclose, sbjcnread, sbjcnwrite, sbjcnioctl, 186 sbjcnstop, sbjcntty, nopoll, nommap, ttykqfilter, D_TTY 187 }; 188 189 #define integrate static inline 190 integrate void sbjcn_rxsoft(struct sbjcn_channel *, struct tty *); 191 integrate void sbjcn_txsoft(struct sbjcn_channel *, struct tty *); 192 integrate void sbjcn_stsoft(struct sbjcn_channel *, struct tty *); 193 integrate void sbjcn_schedrx(struct sbjcn_channel *); 194 integrate void sbjcn_recv(struct sbjcn_channel *ch); 195 void sbjcn_diag(void *); 196 void sbjcn_callout(void *); 197 198 /* 199 * Make this an option variable one can patch. 200 * But be warned: this must be a power of 2! 201 */ 202 u_int sbjcn_rbuf_size = SBJCN_RING_SIZE; 203 204 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 205 u_int sbjcn_rbuf_hiwat = (SBJCN_RING_SIZE * 1) / 4; 206 u_int sbjcn_rbuf_lowat = (SBJCN_RING_SIZE * 3) / 4; 207 208 static int sbjcn_cons_present; 209 static int sbjcn_cons_attached; 210 static u_long sbjcn_cons_addr; 211 static int sbjcn_cons_chan; 212 static int sbjcn_cons_rate; 213 static tcflag_t sbjcn_cons_cflag; 214 static int sbjcn_cons_waiting_input; 215 static uint64_t sbjcn_cons_input_buf; 216 217 #ifdef KGDB 218 #include <sys/kgdb.h> 219 220 static int sbjcn_kgdb_present; 221 static int sbjcn_kgdb_attached; 222 static u_long sbjcn_kgdb_addr; 223 static int sbjcn_kgdb_chan; 224 225 int sbjcn_kgdb_getc(void *); 226 void sbjcn_kgdb_putc(void *, int); 227 #endif /* KGDB */ 228 229 static int sbjcn_match(struct device *, struct cfdata *, void *); 230 static void sbjcn_attach(struct device *, struct device *, void *); 231 232 CFATTACH_DECL(sbjcn, sizeof(struct sbjcn_softc), 233 sbjcn_match, sbjcn_attach, NULL, NULL); 234 235 #define READ_REG(rp) (mips3_ld((uint64_t *)(rp))) 236 #define WRITE_REG(rp, val) (mips3_sd((uint64_t *)(rp), (val))) 237 238 #define JTAG_CONS_CONTROL 0x00 239 #define JTAG_CONS_INPUT 0x20 240 #define JTAG_CONS_OUTPUT 0x40 241 #define JTAG_CONS_MAGICNUM 0x50FABEEF12349873 242 243 #define jtag_input_len(data) (((data) >> 56) & 0xFF) 244 245 246 static int 247 sbjcn_match(struct device *parent, struct cfdata *match, void *aux) 248 { 249 struct sbscd_attach_args *sap = aux; 250 251 if (sap->sa_locs.sa_type != SBSCD_DEVTYPE_JTAGCONS) 252 return (0); 253 254 return 1; 255 } 256 257 static void 258 sbjcn_attach(struct device *parent, struct device *self, void *aux) 259 { 260 struct sbjcn_softc *sc = (struct sbjcn_softc *)self; 261 struct sbscd_attach_args *sap = aux; 262 263 sc->sc_addr = sap->sa_base + sap->sa_locs.sa_offset; 264 265 printf("\n"); 266 sbjcn_attach_channel(sc, 0, sap->sa_locs.sa_intr[0]); 267 } 268 269 void 270 sbjcn_attach_channel(struct sbjcn_softc *sc, int chan, int intr) 271 { 272 struct sbjcn_channel *ch = &sc->sc_channels[chan]; 273 u_long chan_addr; 274 struct tty *tp; 275 276 ch->ch_sc = sc; 277 ch->ch_num = chan; 278 279 chan_addr = sc->sc_addr + (0x100 * chan); 280 ch->ch_base = (void *)MIPS_PHYS_TO_KSEG1(chan_addr); 281 ch->ch_input_reg = 282 (void *)MIPS_PHYS_TO_KSEG1(sc->sc_addr + JTAG_CONS_INPUT); 283 ch->ch_output_reg = 284 (void *)MIPS_PHYS_TO_KSEG1(sc->sc_addr + JTAG_CONS_OUTPUT); 285 ch->ch_control_reg = 286 (void *)MIPS_PHYS_TO_KSEG1(sc->sc_addr + JTAG_CONS_CONTROL); 287 ch->ch_waiting_input = 0; 288 289 ch->ch_i_dcd = ch->ch_i_dcd_pin = 0 /* XXXCGD */; 290 ch->ch_i_cts = ch->ch_i_cts_pin = 0 /* XXXCGD */; 291 ch->ch_i_dsr = ch->ch_i_dsr_pin = 0 /* XXXCGD */; 292 ch->ch_i_ri = ch->ch_i_ri_pin = 0 /* XXXCGD */; 293 ch->ch_i_mask = 294 ch->ch_i_dcd | ch->ch_i_cts | ch->ch_i_dsr | ch->ch_i_ri; 295 ch->ch_o_dtr = ch->ch_o_dtr_pin = 0 /* XXXCGD */; 296 ch->ch_o_rts = ch->ch_o_rts_pin = 0 /* XXXCGD */; 297 ch->ch_o_mask = ch->ch_o_dtr | ch->ch_o_rts; 298 299 callout_init(&ch->ch_diag_callout, 0); 300 callout_init(&ch->ch_callout, 0); 301 302 /* Disable interrupts before configuring the device. */ 303 ch->ch_imr = 0; 304 305 if (sbjcn_cons_present && 306 sbjcn_cons_addr == chan_addr && sbjcn_cons_chan == chan) { 307 sbjcn_cons_attached = 1; 308 309 /* Make sure the console is always "hardwired". */ 310 delay(1000); /* wait for output to finish */ 311 SET(ch->ch_hwflags, SBJCN_HW_CONSOLE); 312 SET(ch->ch_swflags, TIOCFLAG_SOFTCAR); 313 } 314 315 tp = ttymalloc(); 316 tp->t_oproc = sbjcn_start; 317 tp->t_param = sbjcn_param; 318 tp->t_hwiflow = sbjcn_hwiflow; 319 320 ch->ch_tty = tp; 321 ch->ch_rbuf = malloc(sbjcn_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 322 if (ch->ch_rbuf == NULL) { 323 printf("%s: channel %d: unable to allocate ring buffer\n", 324 sc->sc_dev.dv_xname, chan); 325 return; 326 } 327 ch->ch_ebuf = ch->ch_rbuf + (sbjcn_rbuf_size << 1); 328 329 tty_attach(tp); 330 331 if (ISSET(ch->ch_hwflags, SBJCN_HW_CONSOLE)) { 332 int maj; 333 334 /* locate the major number */ 335 maj = cdevsw_lookup_major(&sbjcn_cdevsw); 336 337 cn_tab->cn_dev = makedev(maj, 338 (device_unit(&sc->sc_dev) << 1) + chan); 339 340 printf("%s: channel %d: console\n", sc->sc_dev.dv_xname, chan); 341 } 342 343 #ifdef KGDB 344 /* 345 * Allow kgdb to "take over" this port. If this is 346 * the kgdb device, it has exclusive use. 347 */ 348 if (sbjcn_kgdb_present && 349 sbjcn_kgdb_addr == chan_addr && sbjcn_kgdb_chan == chan) { 350 sbjcn_kgdb_attached = 1; 351 352 SET(ch->ch_hwflags, SBJCN_HW_KGDB); 353 printf("%s: channel %d: kgdb\n", sc->sc_dev.dv_xname, chan); 354 } 355 #endif 356 357 sbjcn_config(ch); 358 359 callout_reset(&ch->ch_callout, hz/10, sbjcn_callout, ch); 360 361 SET(ch->ch_hwflags, SBJCN_HW_DEV_OK); 362 } 363 364 int 365 sbjcn_speed(long speed, long *brcp) 366 { 367 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 368 369 int x, err; 370 int frequency = 100000000; 371 372 *brcp = divrnd(frequency / 20, speed) - 1; 373 374 if (speed <= 0) 375 return (-1); 376 x = divrnd(frequency / 20, speed); 377 if (x <= 0) 378 return (-1); 379 err = divrnd(((quad_t)frequency) * 1000 / 20, speed * x) - 1000; 380 if (err < 0) 381 err = -err; 382 if (err > SBJCN_TOLERANCE) 383 return (-1); 384 *brcp = x - 1; 385 return (0); 386 387 #undef divrnd 388 } 389 390 #ifdef SBJCN_DEBUG 391 void sbjcn_status(struct sbjcn_channel *, char *); 392 393 int sbjcn_debug = 1 /* XXXCGD */; 394 395 void 396 sbjcn_status(struct sbjcn_channel *ch, char *str) 397 { 398 struct sbjcn_softc *sc = ch->ch_sc; 399 struct tty *tp = ch->ch_tty; 400 401 printf("%s: chan %d: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", 402 sc->sc_dev.dv_xname, ch->ch_num, str, 403 ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", 404 ISSET(ch->ch_iports, ch->ch_i_dcd) ? "+" : "-", 405 ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", 406 ISSET(ch->ch_oports, ch->ch_o_dtr) ? "+" : "-", 407 ch->ch_tx_stopped ? "+" : "-"); 408 409 printf("%s: chan %d: %s %scrtscts %scts %sts_ttstop %srts %xrx_flags\n", 410 sc->sc_dev.dv_xname, ch->ch_num, str, 411 ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", 412 ISSET(ch->ch_iports, ch->ch_i_cts) ? "+" : "-", 413 ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", 414 ISSET(ch->ch_oports, ch->ch_o_rts) ? "+" : "-", 415 ch->ch_rx_flags); 416 } 417 #endif 418 419 #if defined(DDB) || defined(KGDB) 420 static void 421 sbjcn_enable_debugport(struct sbjcn_channel *ch) 422 { 423 int s; 424 425 /* Turn on line break interrupt, set carrier. */ 426 s = splserial(); 427 428 ch->ch_imr = 0x04; 429 SET(ch->ch_oports, ch->ch_o_dtr | ch->ch_o_rts); 430 431 splx(s); 432 } 433 #endif 434 435 void 436 sbjcn_config(struct sbjcn_channel *ch) 437 { 438 439 /* Disable interrupts before configuring the device. */ 440 ch->ch_imr = 0x00; 441 442 #ifdef DDB 443 if (ISSET(ch->ch_hwflags, SBJCN_HW_CONSOLE)) 444 sbjcn_enable_debugport(ch); 445 #endif 446 447 #ifdef KGDB 448 /* 449 * Allow kgdb to "take over" this port. If this is 450 * the kgdb device, it has exclusive use. 451 */ 452 if (ISSET(ch->ch_hwflags, SBJCN_HW_KGDB)) 453 sbjcn_enable_debugport(ch); 454 #endif 455 } 456 457 void 458 sbjcn_shutdown(struct sbjcn_channel *ch) 459 { 460 struct tty *tp = ch->ch_tty; 461 int s; 462 463 s = splserial(); 464 465 /* If we were asserting flow control, then deassert it. */ 466 SET(ch->ch_rx_flags, RX_IBUF_BLOCKED); 467 sbjcn_dohwiflow(ch); 468 469 /* Clear any break condition set with TIOCSBRK. */ 470 sbjcn_break(ch, 0); 471 472 /* 473 * Hang up if necessary. Wait a bit, so the other side has time to 474 * notice even if we immediately open the port again. 475 */ 476 if (ISSET(tp->t_cflag, HUPCL)) { 477 sbjcn_modem(ch, 0); 478 (void) tsleep(ch, TTIPRI, ttclos, hz); 479 } 480 481 /* Turn off interrupts. */ 482 #ifdef DDB 483 if (ISSET(ch->ch_hwflags, SBJCN_HW_CONSOLE)) 484 ch->ch_imr = 0x04; /* interrupt on break */ 485 else 486 #endif 487 ch->ch_imr = 0; 488 489 splx(s); 490 } 491 492 int 493 sbjcnopen(dev_t dev, int flag, int mode, struct lwp *l) 494 { 495 int unit = SBJCN_UNIT(dev); 496 int chan = SBJCN_CHAN(dev); 497 struct sbjcn_softc *sc; 498 struct sbjcn_channel *ch; 499 struct tty *tp; 500 int s, s2; 501 int error; 502 503 if (unit >= sbjcn_cd.cd_ndevs) 504 return (ENXIO); 505 sc = sbjcn_cd.cd_devs[unit]; 506 if (sc == 0) 507 return (ENXIO); 508 ch = &sc->sc_channels[chan]; 509 if (!ISSET(ch->ch_hwflags, SBJCN_HW_DEV_OK) || ch->ch_rbuf == NULL) 510 return (ENXIO); 511 512 #ifdef KGDB 513 /* 514 * If this is the kgdb port, no other use is permitted. 515 */ 516 if (ISSET(ch->ch_hwflags, SBJCN_HW_KGDB)) 517 return (EBUSY); 518 #endif 519 520 tp = ch->ch_tty; 521 522 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 523 return (EBUSY); 524 525 s = spltty(); 526 527 /* 528 * Do the following iff this is a first open. 529 */ 530 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 531 struct termios t; 532 533 tp->t_dev = dev; 534 535 s2 = splserial(); 536 537 /* Turn on receive, break, and status change interrupts. */ 538 ch->ch_imr = 0xe; 539 540 /* Fetch the current modem control status, needed later. */ 541 ch->ch_iports = 0; 542 ch->ch_iports_delta = 0; 543 splx(s2); 544 545 /* 546 * Initialize the termios status to the defaults. Add in the 547 * sticky bits from TIOCSFLAGS. 548 */ 549 t.c_ispeed = 0; 550 if (ISSET(ch->ch_hwflags, SBJCN_HW_CONSOLE)) { 551 t.c_ospeed = sbjcn_cons_rate; 552 t.c_cflag = sbjcn_cons_cflag; 553 } else { 554 t.c_ospeed = TTYDEF_SPEED; 555 t.c_cflag = TTYDEF_CFLAG; 556 } 557 if (ISSET(ch->ch_swflags, TIOCFLAG_CLOCAL)) 558 SET(t.c_cflag, CLOCAL); 559 if (ISSET(ch->ch_swflags, TIOCFLAG_CRTSCTS)) 560 SET(t.c_cflag, CRTSCTS); 561 if (ISSET(ch->ch_swflags, TIOCFLAG_MDMBUF)) 562 SET(t.c_cflag, MDMBUF); 563 /* Make sure sbjcn_param() will do something. */ 564 tp->t_ospeed = 0; 565 (void) sbjcn_param(tp, &t); 566 tp->t_iflag = TTYDEF_IFLAG; 567 tp->t_oflag = TTYDEF_OFLAG; 568 tp->t_lflag = TTYDEF_LFLAG; 569 ttychars(tp); 570 ttsetwater(tp); 571 572 s2 = splserial(); 573 574 /* 575 * Turn on DTR. We must always do this, even if carrier is not 576 * present, because otherwise we'd have to use TIOCSDTR 577 * immediately after setting CLOCAL, which applications do not 578 * expect. We always assert DTR while the device is open 579 * unless explicitly requested to deassert it. 580 */ 581 sbjcn_modem(ch, 1); 582 583 /* Clear the input ring, and unblock. */ 584 ch->ch_rbput = ch->ch_rbget = ch->ch_rbuf; 585 ch->ch_rbavail = sbjcn_rbuf_size; 586 sbjcn_iflush(ch); 587 CLR(ch->ch_rx_flags, RX_ANY_BLOCK); 588 sbjcn_dohwiflow(ch); 589 590 #ifdef SBJCN_DEBUG 591 if (sbjcn_debug) 592 sbjcn_status(ch, "sbjcnopen "); 593 #endif 594 595 splx(s2); 596 } 597 598 splx(s); 599 600 error = ttyopen(tp, SBJCN_DIALOUT(dev), ISSET(flag, O_NONBLOCK)); 601 if (error) 602 goto bad; 603 604 error = (*tp->t_linesw->l_open)(dev, tp); 605 if (error) 606 goto bad; 607 608 return (0); 609 610 bad: 611 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 612 /* 613 * We failed to open the device, and nobody else had it opened. 614 * Clean up the state as appropriate. 615 */ 616 sbjcn_shutdown(ch); 617 } 618 619 return (error); 620 } 621 622 int 623 sbjcnclose(dev_t dev, int flag, int mode, struct proc *p) 624 { 625 struct sbjcn_softc *sc = sbjcn_cd.cd_devs[SBJCN_UNIT(dev)]; 626 struct sbjcn_channel *ch = &sc->sc_channels[SBJCN_CHAN(dev)]; 627 struct tty *tp = ch->ch_tty; 628 629 /* XXX This is for cons.c. */ 630 if (!ISSET(tp->t_state, TS_ISOPEN)) 631 return (0); 632 633 (*tp->t_linesw->l_close)(tp, flag); 634 ttyclose(tp); 635 636 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 637 /* 638 * Although we got a last close, the device may still be in 639 * use; e.g. if this was the dialout node, and there are still 640 * processes waiting for carrier on the non-dialout node. 641 */ 642 sbjcn_shutdown(ch); 643 } 644 645 return (0); 646 } 647 648 int 649 sbjcnread(dev_t dev, struct uio *uio, int flag) 650 { 651 struct sbjcn_softc *sc = sbjcn_cd.cd_devs[SBJCN_UNIT(dev)]; 652 struct sbjcn_channel *ch = &sc->sc_channels[SBJCN_CHAN(dev)]; 653 struct tty *tp = ch->ch_tty; 654 655 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 656 } 657 658 int 659 sbjcnwrite(dev_t dev, struct uio *uio, int flag) 660 { 661 struct sbjcn_softc *sc = sbjcn_cd.cd_devs[SBJCN_UNIT(dev)]; 662 struct sbjcn_channel *ch = &sc->sc_channels[SBJCN_CHAN(dev)]; 663 struct tty *tp = ch->ch_tty; 664 665 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 666 } 667 668 struct tty * 669 sbjcntty(dev_t dev) 670 { 671 struct sbjcn_softc *sc = sbjcn_cd.cd_devs[SBJCN_UNIT(dev)]; 672 struct sbjcn_channel *ch = &sc->sc_channels[SBJCN_CHAN(dev)]; 673 struct tty *tp = ch->ch_tty; 674 675 return (tp); 676 } 677 678 int 679 sbjcnioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 680 { 681 struct sbjcn_softc *sc = sbjcn_cd.cd_devs[SBJCN_UNIT(dev)]; 682 struct sbjcn_channel *ch = &sc->sc_channels[SBJCN_CHAN(dev)]; 683 struct tty *tp = ch->ch_tty; 684 int error; 685 int s; 686 687 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 688 if (error >= 0) 689 return (error); 690 691 error = ttioctl(tp, cmd, data, flag, p); 692 if (error >= 0) 693 return (error); 694 695 error = 0; 696 697 s = splserial(); 698 699 switch (cmd) { 700 case TIOCSBRK: 701 sbjcn_break(ch, 1); 702 break; 703 704 case TIOCCBRK: 705 sbjcn_break(ch, 0); 706 break; 707 708 case TIOCSDTR: 709 sbjcn_modem(ch, 1); 710 break; 711 712 case TIOCCDTR: 713 sbjcn_modem(ch, 0); 714 break; 715 716 case TIOCGFLAGS: 717 *(int *)data = ch->ch_swflags; 718 break; 719 720 case TIOCSFLAGS: 721 error = kauth_authorize_device_tty(l->l_cred, 722 KAUTH_DEVICE_TTY_PRIVSET, tp); 723 if (error) 724 break; 725 ch->ch_swflags = *(int *)data; 726 break; 727 728 case TIOCMSET: 729 case TIOCMBIS: 730 case TIOCMBIC: 731 tiocm_to_sbjcn(ch, cmd, *(int *)data); 732 break; 733 734 case TIOCMGET: 735 *(int *)data = sbjcn_to_tiocm(ch); 736 break; 737 738 default: 739 error = ENOTTY; 740 break; 741 } 742 743 splx(s); 744 745 #ifdef SBJCN_DEBUG 746 if (sbjcn_debug) 747 sbjcn_status(ch, "sbjcn_ioctl "); 748 #endif 749 750 return (error); 751 } 752 753 integrate void 754 sbjcn_schedrx(struct sbjcn_channel *ch) 755 { 756 757 ch->ch_rx_ready = 1; 758 759 /* Next callout will detect this flag. */ 760 } 761 762 void 763 sbjcn_break(struct sbjcn_channel *ch, int onoff) 764 { 765 /* XXXKW do something? */ 766 } 767 768 void 769 sbjcn_modem(struct sbjcn_channel *ch, int onoff) 770 { 771 772 if (ch->ch_o_dtr == 0) 773 return; 774 775 if (onoff) 776 SET(ch->ch_oports, ch->ch_o_dtr); 777 else 778 CLR(ch->ch_oports, ch->ch_o_dtr); 779 780 if (!ch->ch_heldchange) { 781 if (ch->ch_tx_busy) { 782 ch->ch_heldtbc = ch->ch_tbc; 783 ch->ch_tbc = 0; 784 ch->ch_heldchange = 1; 785 } else 786 sbjcn_loadchannelregs(ch); 787 } 788 } 789 790 void 791 tiocm_to_sbjcn(struct sbjcn_channel *ch, int how, int ttybits) 792 { 793 u_char bits; 794 795 bits = 0; 796 if (ISSET(ttybits, TIOCM_DTR)) 797 SET(bits, ch->ch_o_dtr); 798 if (ISSET(ttybits, TIOCM_RTS)) 799 SET(bits, ch->ch_o_rts); 800 801 switch (how) { 802 case TIOCMBIC: 803 CLR(ch->ch_oports, bits); 804 break; 805 806 case TIOCMBIS: 807 SET(ch->ch_oports, bits); 808 break; 809 810 case TIOCMSET: 811 ch->ch_oports = bits; 812 break; 813 } 814 815 if (!ch->ch_heldchange) { 816 if (ch->ch_tx_busy) { 817 ch->ch_heldtbc = ch->ch_tbc; 818 ch->ch_tbc = 0; 819 ch->ch_heldchange = 1; 820 } else 821 sbjcn_loadchannelregs(ch); 822 } 823 } 824 825 int 826 sbjcn_to_tiocm(struct sbjcn_channel *ch) 827 { 828 u_char hwbits; 829 int ttybits = 0; 830 831 hwbits = ch->ch_oports; 832 if (ISSET(hwbits, ch->ch_o_dtr)) 833 SET(ttybits, TIOCM_DTR); 834 if (ISSET(hwbits, ch->ch_o_rts)) 835 SET(ttybits, TIOCM_RTS); 836 837 hwbits = ch->ch_iports; 838 if (ISSET(hwbits, ch->ch_i_dcd)) 839 SET(ttybits, TIOCM_CD); 840 if (ISSET(hwbits, ch->ch_i_cts)) 841 SET(ttybits, TIOCM_CTS); 842 if (ISSET(hwbits, ch->ch_i_dsr)) 843 SET(ttybits, TIOCM_DSR); 844 if (ISSET(hwbits, ch->ch_i_ri)) 845 SET(ttybits, TIOCM_RI); 846 847 if (ch->ch_imr != 0) 848 SET(ttybits, TIOCM_LE); 849 850 return (ttybits); 851 } 852 853 static int 854 cflag2modes(cflag, mode1p, mode2p) 855 tcflag_t cflag; 856 u_char *mode1p; 857 u_char *mode2p; 858 { 859 u_char mode1; 860 u_char mode2; 861 int err = 0; 862 863 mode1 = mode2 = 0; 864 865 switch (ISSET(cflag, CSIZE)) { 866 case CS7: 867 mode1 |= 2; /* XXX */ 868 break; 869 default: 870 err = -1; 871 /* FALLTHRU for sanity */ 872 case CS8: 873 mode1 |= 3; /* XXX */ 874 break; 875 } 876 if (!ISSET(cflag, PARENB)) 877 mode1 |= 2 << 3; 878 else { 879 mode1 |= 0 << 3; 880 if (ISSET(cflag, PARODD)) 881 mode1 |= 1 << 2; 882 } 883 884 if (ISSET(cflag, CSTOPB)) 885 mode2 |= 1 << 3; /* two stop bits XXX not std */ 886 887 if (ISSET(cflag, CRTSCTS)) { 888 mode1 |= 1 << 7; 889 mode2 |= 1 << 4; 890 } 891 892 *mode1p = mode1; 893 *mode2p = mode2; 894 return (err); 895 } 896 897 int 898 sbjcn_param(struct tty *tp, struct termios *t) 899 { 900 struct sbjcn_softc *sc = sbjcn_cd.cd_devs[SBJCN_UNIT(tp->t_dev)]; 901 struct sbjcn_channel *ch = &sc->sc_channels[SBJCN_CHAN(tp->t_dev)]; 902 long brc; 903 u_char mode1, mode2; 904 int s; 905 906 /* XXX reset to console parameters if console? */ 907 #if 0 908 XXX disable, enable. 909 #endif 910 911 /* Check requested parameters. */ 912 if (sbjcn_speed(t->c_ospeed, &brc) < 0) 913 return (EINVAL); 914 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 915 return (EINVAL); 916 917 /* 918 * For the console, always force CLOCAL and !HUPCL, so that the port 919 * is always active. 920 */ 921 if (ISSET(ch->ch_swflags, TIOCFLAG_SOFTCAR) || 922 ISSET(ch->ch_hwflags, SBJCN_HW_CONSOLE)) { 923 SET(t->c_cflag, CLOCAL); 924 CLR(t->c_cflag, HUPCL); 925 } 926 927 /* 928 * If there were no changes, don't do anything. This avoids dropping 929 * input and improves performance when all we did was frob things like 930 * VMIN and VTIME. 931 */ 932 if (tp->t_ospeed == t->c_ospeed && 933 tp->t_cflag == t->c_cflag) 934 return (0); 935 936 if (cflag2modes(t->c_cflag, &mode1, &mode2) < 0) 937 return (EINVAL); 938 939 s = splserial(); 940 941 ch->ch_mode1 = mode1; 942 ch->ch_mode2 = mode2; 943 944 /* 945 * If we're not in a mode that assumes a connection is present, then 946 * ignore carrier changes. 947 */ 948 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 949 ch->ch_i_dcd = 0; 950 else 951 ch->ch_i_dcd = ch->ch_i_dcd_pin; 952 /* 953 * Set the flow control pins depending on the current flow control 954 * mode. 955 */ 956 if (ISSET(t->c_cflag, CRTSCTS)) { 957 ch->ch_o_dtr = ch->ch_o_dtr_pin; 958 ch->ch_o_rts = ch->ch_o_rts_pin; 959 ch->ch_i_cts = ch->ch_i_cts_pin; 960 /* hw controle enable bits in mod regs set by cflag2modes */ 961 } else if (ISSET(t->c_cflag, MDMBUF)) { 962 /* 963 * For DTR/DCD flow control, make sure we don't toggle DTR for 964 * carrier detection. 965 */ 966 ch->ch_o_dtr = 0; 967 ch->ch_o_rts = ch->ch_o_dtr_pin; 968 ch->ch_i_cts = ch->ch_i_dcd_pin; 969 } else { 970 /* 971 * If no flow control, then always set RTS. This will make 972 * the other side happy if it mistakenly thinks we're doing 973 * RTS/CTS flow control. 974 */ 975 ch->ch_o_dtr = ch->ch_o_dtr_pin | ch->ch_o_rts_pin; 976 ch->ch_o_rts = 0; 977 ch->ch_i_cts = 0; 978 if (ISSET(ch->ch_oports, ch->ch_o_dtr_pin)) 979 SET(ch->ch_oports, ch->ch_o_rts_pin); 980 else 981 CLR(ch->ch_oports, ch->ch_o_rts_pin); 982 } 983 /* XXX maybe mask the ports which generate intrs? */ 984 985 ch->ch_brc = brc; 986 987 /* XXX maybe set fifo-full receive mode if RTSCTS and high speed? */ 988 989 /* And copy to tty. */ 990 tp->t_ispeed = 0; 991 tp->t_ospeed = t->c_ospeed; 992 tp->t_cflag = t->c_cflag; 993 994 if (!ch->ch_heldchange) { 995 if (ch->ch_tx_busy) { 996 ch->ch_heldtbc = ch->ch_tbc; 997 ch->ch_tbc = 0; 998 ch->ch_heldchange = 1; 999 } else 1000 sbjcn_loadchannelregs(ch); 1001 } 1002 1003 if (!ISSET(t->c_cflag, CHWFLOW)) { 1004 /* Disable the high water mark. */ 1005 ch->ch_r_hiwat = 0; 1006 ch->ch_r_lowat = 0; 1007 if (ISSET(ch->ch_rx_flags, RX_TTY_OVERFLOWED)) { 1008 CLR(ch->ch_rx_flags, RX_TTY_OVERFLOWED); 1009 sbjcn_schedrx(ch); 1010 } 1011 if (ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 1012 CLR(ch->ch_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 1013 sbjcn_dohwiflow(ch); 1014 } 1015 } else { 1016 ch->ch_r_hiwat = sbjcn_rbuf_hiwat; 1017 ch->ch_r_lowat = sbjcn_rbuf_lowat; 1018 } 1019 1020 splx(s); 1021 1022 /* 1023 * Update the tty layer's idea of the carrier bit, in case we changed 1024 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1025 * explicit request. 1026 */ 1027 (void) (*tp->t_linesw->l_modem)(tp, 1028 ISSET(ch->ch_iports, ch->ch_i_dcd)); 1029 1030 #ifdef SBJCN_DEBUG 1031 if (sbjcn_debug) 1032 sbjcn_status(ch, "sbjcnparam "); 1033 #endif 1034 1035 if (!ISSET(t->c_cflag, CHWFLOW)) { 1036 if (ch->ch_tx_stopped) { 1037 ch->ch_tx_stopped = 0; 1038 sbjcn_start(tp); 1039 } 1040 } 1041 1042 return (0); 1043 } 1044 1045 void 1046 sbjcn_iflush(struct sbjcn_channel *ch) 1047 { 1048 uint64_t reg; 1049 int timo; 1050 1051 timo = 50000; 1052 /* flush any pending I/O */ 1053 while (((reg = READ_REG(ch->ch_input_reg)) != 0) && --timo) 1054 ; 1055 1056 #ifdef DIAGNOSTIC 1057 if (!timo) 1058 printf("%s: sbjcn_iflush timeout %02x\n", 1059 ch->ch_sc->sc_dev.dv_xname, reg); 1060 #endif 1061 } 1062 1063 void 1064 sbjcn_loadchannelregs(struct sbjcn_channel *ch) 1065 { 1066 } 1067 1068 int 1069 sbjcn_hwiflow(struct tty *tp, int block) 1070 { 1071 struct sbjcn_softc *sc = sbjcn_cd.cd_devs[SBJCN_UNIT(tp->t_dev)]; 1072 struct sbjcn_channel *ch = &sc->sc_channels[SBJCN_CHAN(tp->t_dev)]; 1073 int s; 1074 1075 if (ch->ch_o_rts == 0) 1076 return (0); 1077 1078 s = splserial(); 1079 if (block) { 1080 if (!ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED)) { 1081 SET(ch->ch_rx_flags, RX_TTY_BLOCKED); 1082 sbjcn_dohwiflow(ch); 1083 } 1084 } else { 1085 if (ISSET(ch->ch_rx_flags, RX_TTY_OVERFLOWED)) { 1086 CLR(ch->ch_rx_flags, RX_TTY_OVERFLOWED); 1087 sbjcn_schedrx(ch); 1088 } 1089 if (ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED)) { 1090 CLR(ch->ch_rx_flags, RX_TTY_BLOCKED); 1091 sbjcn_dohwiflow(ch); 1092 } 1093 } 1094 splx(s); 1095 return (1); 1096 } 1097 1098 /* 1099 * (un)block input via hw flowcontrol 1100 */ 1101 void 1102 sbjcn_dohwiflow(struct sbjcn_channel *ch) 1103 { 1104 1105 if (ch->ch_o_rts == 0) 1106 return; 1107 1108 if (ISSET(ch->ch_rx_flags, RX_ANY_BLOCK)) { 1109 CLR(ch->ch_oports, ch->ch_o_rts); 1110 CLR(ch->ch_oports_active, ch->ch_o_rts); 1111 } else { 1112 SET(ch->ch_oports, ch->ch_o_rts); 1113 SET(ch->ch_oports_active, ch->ch_o_rts); 1114 } 1115 } 1116 1117 void 1118 sbjcn_start(struct tty *tp) 1119 { 1120 struct sbjcn_softc *sc = sbjcn_cd.cd_devs[SBJCN_UNIT(tp->t_dev)]; 1121 struct sbjcn_channel *ch = &sc->sc_channels[SBJCN_CHAN(tp->t_dev)]; 1122 int s; 1123 1124 s = spltty(); 1125 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1126 goto out; 1127 if (ch->ch_tx_stopped) 1128 goto out; 1129 if (!ttypull(tp)) 1130 goto out; 1131 1132 /* Grab the first contiguous region of buffer space. */ 1133 { 1134 u_char *tba; 1135 int tbc; 1136 1137 tba = tp->t_outq.c_cf; 1138 tbc = ndqb(&tp->t_outq, 0); 1139 1140 (void)splserial(); 1141 1142 ch->ch_tba = tba; 1143 ch->ch_tbc = tbc; 1144 } 1145 1146 SET(tp->t_state, TS_BUSY); 1147 ch->ch_tx_busy = 1; 1148 1149 /* Output the first chunk of the contiguous buffer. */ 1150 { 1151 while (ch->ch_tbc) { 1152 uint64_t data; 1153 int bytes, i; 1154 1155 bytes = (ch->ch_tbc > 7) ? 7 : ch->ch_tbc; 1156 data = bytes; 1157 for (i=0; i<bytes; i++) { 1158 data <<= 8; 1159 data |= *ch->ch_tba++; 1160 } 1161 if (bytes < 7) 1162 data <<= 56-(bytes<<3); 1163 ch->ch_tbc -= bytes; 1164 WRITE_REG(ch->ch_output_reg, data); 1165 } 1166 ch->ch_tx_busy = 0; 1167 ch->ch_tx_done = 1; 1168 } 1169 out: 1170 splx(s); 1171 return; 1172 } 1173 1174 /* 1175 * Stop output on a line. 1176 */ 1177 void 1178 sbjcnstop(struct tty *tp, int flag) 1179 { 1180 struct sbjcn_softc *sc = sbjcn_cd.cd_devs[SBJCN_UNIT(tp->t_dev)]; 1181 struct sbjcn_channel *ch = &sc->sc_channels[SBJCN_CHAN(tp->t_dev)]; 1182 int s; 1183 1184 s = splserial(); 1185 if (ISSET(tp->t_state, TS_BUSY)) { 1186 /* Stop transmitting at the next chunk. */ 1187 ch->ch_tbc = 0; 1188 ch->ch_heldtbc = 0; 1189 if (!ISSET(tp->t_state, TS_TTSTOP)) 1190 SET(tp->t_state, TS_FLUSH); 1191 } 1192 splx(s); 1193 } 1194 1195 void 1196 sbjcn_diag(arg) 1197 void *arg; 1198 { 1199 struct sbjcn_channel *ch = arg; 1200 struct sbjcn_softc *sc = ch->ch_sc; 1201 int overflows, floods; 1202 int s; 1203 1204 s = splserial(); 1205 overflows = ch->ch_overflows; 1206 ch->ch_overflows = 0; 1207 floods = ch->ch_floods; 1208 ch->ch_floods = 0; 1209 ch->ch_errors = 0; 1210 splx(s); 1211 1212 log(LOG_WARNING, "%s: channel %d: %d fifo overflow%s, %d ibuf flood%s\n", 1213 sc->sc_dev.dv_xname, ch->ch_num, 1214 overflows, overflows == 1 ? "" : "s", 1215 floods, floods == 1 ? "" : "s"); 1216 } 1217 1218 integrate void 1219 sbjcn_rxsoft(struct sbjcn_channel *ch, struct tty *tp) 1220 { 1221 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1222 u_char *get, *end; 1223 u_int cc, scc; 1224 u_char sr; 1225 int code; 1226 int s; 1227 1228 end = ch->ch_ebuf; 1229 get = ch->ch_rbget; 1230 scc = cc = sbjcn_rbuf_size - ch->ch_rbavail; 1231 1232 if (cc == sbjcn_rbuf_size) { 1233 ch->ch_floods++; 1234 if (ch->ch_errors++ == 0) 1235 callout_reset(&ch->ch_diag_callout, 60 * hz, 1236 sbjcn_diag, ch); 1237 } 1238 1239 while (cc) { 1240 code = get[0]; 1241 sr = get[1]; 1242 if (ISSET(sr, 0xf0)) { 1243 if (ISSET(sr, 0x10)) { 1244 ch->ch_overflows++; 1245 if (ch->ch_errors++ == 0) 1246 callout_reset(&ch->ch_diag_callout, 1247 60 * hz, sbjcn_diag, ch); 1248 } 1249 if (ISSET(sr, 0xc0)) 1250 SET(code, TTY_FE); 1251 if (ISSET(sr, 0x20)) 1252 SET(code, TTY_PE); 1253 } 1254 if ((*rint)(code, tp) == -1) { 1255 /* 1256 * The line discipline's buffer is out of space. 1257 */ 1258 if (!ISSET(ch->ch_rx_flags, RX_TTY_BLOCKED)) { 1259 /* 1260 * We're either not using flow control, or the 1261 * line discipline didn't tell us to block for 1262 * some reason. Either way, we have no way to 1263 * know when there's more space available, so 1264 * just drop the rest of the data. 1265 */ 1266 get += cc << 1; 1267 if (get >= end) 1268 get -= sbjcn_rbuf_size << 1; 1269 cc = 0; 1270 } else { 1271 /* 1272 * Don't schedule any more receive processing 1273 * until the line discipline tells us there's 1274 * space available (through comhwiflow()). 1275 * Leave the rest of the data in the input 1276 * buffer. 1277 */ 1278 SET(ch->ch_rx_flags, RX_TTY_OVERFLOWED); 1279 } 1280 break; 1281 } 1282 get += 2; 1283 if (get >= end) 1284 get = ch->ch_rbuf; 1285 cc--; 1286 } 1287 1288 if (cc != scc) { 1289 ch->ch_rbget = get; 1290 s = splserial(); 1291 cc = ch->ch_rbavail += scc - cc; 1292 /* Buffers should be ok again, release possible block. */ 1293 if (cc >= ch->ch_r_lowat) { 1294 if (ISSET(ch->ch_rx_flags, RX_IBUF_OVERFLOWED)) { 1295 CLR(ch->ch_rx_flags, RX_IBUF_OVERFLOWED); 1296 SET(ch->ch_imr, 0x02); 1297 } 1298 if (ISSET(ch->ch_rx_flags, RX_IBUF_BLOCKED)) { 1299 CLR(ch->ch_rx_flags, RX_IBUF_BLOCKED); 1300 sbjcn_dohwiflow(ch); 1301 } 1302 } 1303 splx(s); 1304 } 1305 } 1306 1307 integrate void 1308 sbjcn_txsoft(struct sbjcn_channel *ch, struct tty *tp) 1309 { 1310 1311 CLR(tp->t_state, TS_BUSY); 1312 if (ISSET(tp->t_state, TS_FLUSH)) 1313 CLR(tp->t_state, TS_FLUSH); 1314 else 1315 ndflush(&tp->t_outq, (int)(ch->ch_tba - tp->t_outq.c_cf)); 1316 (*tp->t_linesw->l_start)(tp); 1317 } 1318 1319 integrate void 1320 sbjcn_stsoft(struct sbjcn_channel *ch, struct tty *tp) 1321 { 1322 u_char iports, delta; 1323 int s; 1324 1325 s = splserial(); 1326 iports = ch->ch_iports; 1327 delta = ch->ch_iports_delta; 1328 ch->ch_iports_delta = 0; 1329 splx(s); 1330 1331 if (ISSET(delta, ch->ch_i_dcd)) { 1332 /* 1333 * Inform the tty layer that carrier detect changed. 1334 */ 1335 (void) (*tp->t_linesw->l_modem)(tp, 1336 ISSET(iports, ch->ch_i_dcd)); 1337 } 1338 1339 if (ISSET(delta, ch->ch_i_cts)) { 1340 /* Block or unblock output according to flow control. */ 1341 if (ISSET(iports, ch->ch_i_cts)) { 1342 ch->ch_tx_stopped = 0; 1343 (*tp->t_linesw->l_start)(tp); 1344 } else { 1345 ch->ch_tx_stopped = 1; 1346 } 1347 } 1348 1349 #ifdef SBJCN_DEBUG 1350 if (sbjcn_debug) 1351 sbjcn_status(ch, "sbjcn_stsoft"); 1352 #endif 1353 } 1354 1355 integrate void 1356 sbjcn_recv(struct sbjcn_channel *ch) 1357 { 1358 u_char *put, *end; 1359 u_int cc; 1360 1361 end = ch->ch_ebuf; 1362 put = ch->ch_rbput; 1363 cc = ch->ch_rbavail; 1364 1365 /* XXX process break */ 1366 1367 sbjcncn_grabdword(ch); 1368 if (ch->ch_waiting_input) { 1369 if (!ISSET(ch->ch_rx_flags, RX_IBUF_OVERFLOWED)) { 1370 while (cc > 0) { 1371 put[0] = sbjcncn_nextbyte(ch); 1372 put[1] = 1; /* XXXKW ? */ 1373 put += 2; 1374 if (put >= end) 1375 put = ch->ch_rbuf; 1376 cc--; 1377 1378 if (!ch->ch_waiting_input) 1379 break; 1380 } 1381 1382 /* 1383 * Current string of incoming characters ended 1384 * because no more data was available or we 1385 * ran out of space. Schedule a receive event 1386 * if any data was received. If we're out of 1387 * space, turn off receive interrupts. 1388 */ 1389 ch->ch_rbput = put; 1390 ch->ch_rbavail = cc; 1391 if (!ISSET(ch->ch_rx_flags, RX_TTY_OVERFLOWED)) 1392 ch->ch_rx_ready = 1; 1393 1394 /* 1395 * See if we are in danger of overflowing a 1396 * buffer. If so, use hardware flow control 1397 * to ease the pressure. 1398 */ 1399 if (!ISSET(ch->ch_rx_flags, RX_IBUF_BLOCKED) && 1400 cc < ch->ch_r_hiwat) { 1401 SET(ch->ch_rx_flags, RX_IBUF_BLOCKED); 1402 sbjcn_dohwiflow(ch); 1403 } 1404 1405 /* 1406 * If we're out of space, disable receive 1407 * interrupts until the queue has drained 1408 * a bit. 1409 */ 1410 if (!cc) { 1411 SET(ch->ch_rx_flags, 1412 RX_IBUF_OVERFLOWED); 1413 CLR(ch->ch_imr, 0x02); 1414 } 1415 } else { 1416 /* XXX panic? */ 1417 CLR(ch->ch_imr, 0x02); 1418 // continue; 1419 } 1420 } 1421 1422 /* 1423 * If we've delayed a parameter change, do it now, and restart 1424 * output. 1425 */ 1426 if (ch->ch_heldchange) { 1427 sbjcn_loadchannelregs(ch); 1428 ch->ch_heldchange = 0; 1429 ch->ch_tbc = ch->ch_heldtbc; 1430 ch->ch_heldtbc = 0; 1431 } 1432 } 1433 1434 void 1435 sbjcn_callout(void *arg) 1436 { 1437 struct sbjcn_channel *ch = arg; 1438 struct tty *tp = ch->ch_tty; 1439 1440 /* XXX get stuff */ 1441 sbjcn_recv(ch); 1442 1443 /* XXX check receive */ 1444 if (ch->ch_rx_ready) { 1445 ch->ch_rx_ready = 0; 1446 sbjcn_rxsoft(ch, tp); 1447 } 1448 1449 /* XXX check transmit */ 1450 if (ch->ch_tx_done) { 1451 ch->ch_tx_done = 0; 1452 sbjcn_txsoft(ch, tp); 1453 } 1454 1455 callout_reset(&ch->ch_callout, hz/10, sbjcn_callout, ch); 1456 } 1457 1458 static char sbjcncn_nextbyte(struct sbjcn_channel *ch) 1459 { 1460 char c; 1461 1462 sbjcncn_grabdword(ch); 1463 c = (ch->ch_input_buf >> 56) & 0xff; 1464 ch->ch_input_buf <<= 8; 1465 ch->ch_waiting_input--; 1466 return c; 1467 } 1468 1469 static void sbjcncn_grabdword(struct sbjcn_channel *ch) 1470 { 1471 uint64_t inbuf; 1472 1473 if (ch->ch_waiting_input) 1474 return; 1475 1476 inbuf = READ_REG(ch->ch_input_reg); 1477 ch->ch_waiting_input = jtag_input_len(inbuf); 1478 ch->ch_input_buf = inbuf << 8; 1479 } 1480 1481 /* 1482 * Initialize UART for use as console or KGDB line. 1483 */ 1484 int 1485 sbjcn_init(u_long addr, int chan, int rate, tcflag_t cflag) 1486 { 1487 /* XXXKW Anything to do here? */ 1488 return (0); 1489 } 1490 1491 /* 1492 * Following are all routines needed for sbjcn to act as console 1493 */ 1494 int 1495 sbjcn_cnattach(u_long addr, int chan, int rate, tcflag_t cflag) 1496 { 1497 int res; 1498 uint64_t ctrl_val; 1499 static struct consdev sbjcn_cons = { 1500 NULL, NULL, sbjcn_cngetc, sbjcn_cnputc, sbjcn_cnpollc, NULL, 1501 NODEV, CN_NORMAL 1502 }; 1503 1504 res = sbjcn_init(addr, chan, rate, cflag); 1505 if (res) 1506 return (res); 1507 1508 cn_tab = &sbjcn_cons; 1509 1510 sbjcn_cons_present = 1; 1511 sbjcn_cons_addr = addr; 1512 sbjcn_cons_waiting_input = 0; 1513 sbjcn_cons_chan = chan; 1514 sbjcn_cons_rate = rate; 1515 sbjcn_cons_cflag = cflag; 1516 1517 /* Wait for sign of life from the other end */ 1518 while ((ctrl_val = READ_REG(MIPS_PHYS_TO_KSEG1(sbjcn_cons_addr + JTAG_CONS_CONTROL))) == 0) 1519 ; 1520 1521 return (ctrl_val != JTAG_CONS_MAGICNUM); 1522 } 1523 1524 int 1525 sbjcn_cngetc(dev_t dev) 1526 { 1527 char c; 1528 1529 while (sbjcn_cons_waiting_input == 0) 1530 sbjcn_cngrabdword(); 1531 1532 c = (sbjcn_cons_input_buf >> 56) & 0xff; 1533 sbjcn_cons_input_buf <<= 8; 1534 sbjcn_cons_waiting_input--; 1535 1536 return c; 1537 } 1538 1539 /* 1540 * Console kernel output character routine. 1541 */ 1542 void 1543 sbjcn_cnputc(dev_t dev, int c) 1544 { 1545 uint64_t outbuf; 1546 1547 outbuf = (1LL << 56) | (((uint64_t)c) << 48); 1548 WRITE_REG(MIPS_PHYS_TO_KSEG1(sbjcn_cons_addr + JTAG_CONS_OUTPUT), outbuf); 1549 } 1550 1551 void 1552 sbjcn_cnpollc(dev_t dev, int on) 1553 { 1554 1555 } 1556 1557 static void sbjcn_cngrabdword(void) 1558 { 1559 uint64_t inbuf; 1560 1561 if (sbjcn_cons_waiting_input) 1562 return; 1563 1564 inbuf = READ_REG(MIPS_PHYS_TO_KSEG1(sbjcn_cons_addr + JTAG_CONS_INPUT)); 1565 sbjcn_cons_waiting_input = jtag_input_len(inbuf); 1566 sbjcn_cons_input_buf = inbuf << 8; 1567 } 1568 1569 #ifdef KGDB 1570 int 1571 sbjcn_kgdb_attach(u_long addr, int chan, int rate, tcflag_t cflag) 1572 { 1573 int res; 1574 1575 if (!sbjcn_cons_present && 1576 sbjcn_cons_addr == addr && sbjcn_cons_chan == chan) 1577 return (EBUSY); /* cannot share with console */ 1578 1579 res = sbjcn_init(addr, chan, rate, cflag); 1580 if (res) 1581 return (res); 1582 1583 kgdb_attach(sbjcn_kgdb_getc, sbjcn_kgdb_putc, NULL); 1584 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 1585 kgdb_rate = rate; 1586 1587 sbjcn_kgdb_present = 1; 1588 /* XXX sbjcn_init wants addr, but we need the offset addr */ 1589 sbjcn_kgdb_addr = addr + (chan * 0x100); 1590 sbjcn_kgdb_chan = chan; 1591 1592 return (0); 1593 } 1594 1595 /* ARGSUSED */ 1596 int 1597 sbjcn_kgdb_getc(arg) 1598 void *arg; 1599 { 1600 1601 return (sbjcn_common_getc(sbjcn_kgdb_addr, sbjcn_kgdb_chan)); 1602 } 1603 1604 /* ARGSUSED */ 1605 void 1606 sbjcn_kgdb_putc(arg, c) 1607 void *arg; 1608 int c; 1609 { 1610 1611 sbjcn_common_putc(sbjcn_kgdb_addr, sbjcn_kgdb_chan, c); 1612 } 1613 #endif /* KGDB */ 1614 1615 /* 1616 * helper function to identify the sbjcn channels used by 1617 * console or KGDB (and not yet autoconf attached) 1618 */ 1619 int 1620 sbjcn_is_console(u_long addr, int chan) 1621 { 1622 1623 if (sbjcn_cons_present && !sbjcn_cons_attached && 1624 sbjcn_cons_addr == addr && sbjcn_cons_chan == chan) 1625 return (1); 1626 #ifdef KGDB 1627 if (sbjcn_kgdb_present && !sbjcn_kgdb_attached && 1628 sbjcn_kgdb_addr == addr && sbjcn_kgdb_chan == chan) 1629 return (1); 1630 #endif 1631 return (0); 1632 } 1633
Indexes created Wed Oct 01 07:09:59 GMT 2025