1 /* $NetBSD: zs.c,v 1.54 1997/11/12 22:18:54 pk Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Zilog Z8530 Dual UART driver (machine-dependent part) 41 * 42 * Runs two serial lines per chip using slave drivers. 43 * Plain tty/async lines use the zs_async slave. 44 * Sun keyboard/mouse uses the zs_kbd/zs_ms slaves. 45 */ 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/conf.h> 50 #include <sys/device.h> 51 #include <sys/file.h> 52 #include <sys/ioctl.h> 53 #include <sys/kernel.h> 54 #include <sys/proc.h> 55 #include <sys/tty.h> 56 #include <sys/time.h> 57 #include <sys/syslog.h> 58 59 #include <machine/autoconf.h> 60 #include <machine/bsd_openprom.h> 61 #include <machine/conf.h> 62 #include <machine/cpu.h> 63 #include <machine/eeprom.h> 64 #include <machine/psl.h> 65 #include <machine/z8530var.h> 66 67 #include <dev/cons.h> 68 #include <dev/ic/z8530reg.h> 69 70 #include <sparc/sparc/vaddrs.h> 71 #include <sparc/sparc/auxreg.h> 72 #include <sparc/dev/cons.h> 73 74 #include "kbd.h" /* NKBD */ 75 #include "zs.h" /* NZS */ 76 77 /* Make life easier for the initialized arrays here. */ 78 #if NZS < 3 79 #undef NZS 80 #define NZS 3 81 #endif 82 83 /* 84 * Some warts needed by z8530tty.c - 85 * The default parity REALLY needs to be the same as the PROM uses, 86 * or you can not see messages done with printf during boot-up... 87 */ 88 int zs_def_cflag = (CREAD | CS8 | HUPCL); 89 int zs_major = 12; 90 91 /* 92 * The Sun provides a 4.9152 MHz clock to the ZS chips. 93 */ 94 #define PCLK (9600 * 512) /* PCLK pin input clock rate */ 95 96 /* 97 * Select software interrupt bit based on TTY ipl. 98 */ 99 #if PIL_TTY == 1 100 # define IE_ZSSOFT IE_L1 101 #elif PIL_TTY == 4 102 # define IE_ZSSOFT IE_L4 103 #elif PIL_TTY == 6 104 # define IE_ZSSOFT IE_L6 105 #else 106 # error "no suitable software interrupt bit" 107 #endif 108 109 /* 110 * The next three variables provide a shortcut to the channel state 111 * structure used by zscnputc(). 112 */ 113 int zs_console_unit = -1; 114 int zs_console_channel = -1; 115 struct zs_chanstate *zs_conschanstate; 116 117 #define ZS_DELAY() (CPU_ISSUN4C ? (0) : delay(2)) 118 119 /* The layout of this is hardware-dependent (padding, order). */ 120 struct zschan { 121 volatile u_char zc_csr; /* ctrl,status, and indirect access */ 122 u_char zc_xxx0; 123 volatile u_char zc_data; /* data */ 124 u_char zc_xxx1; 125 }; 126 struct zsdevice { 127 /* Yes, they are backwards. */ 128 struct zschan zs_chan_b; 129 struct zschan zs_chan_a; 130 }; 131 132 /* Saved PROM mappings */ 133 static struct zsdevice *zsaddr[NZS]; 134 135 /* Flags from cninit() */ 136 static int zs_hwflags[NZS][2]; 137 138 /* Default speed for each channel */ 139 static int zs_defspeed[NZS][2] = { 140 { 9600, /* ttya */ 141 9600 }, /* ttyb */ 142 { 1200, /* keyboard */ 143 1200 }, /* mouse */ 144 { 9600, /* ttyc */ 145 9600 }, /* ttyd */ 146 }; 147 148 static u_char zs_init_reg[16] = { 149 0, /* 0: CMD (reset, etc.) */ 150 0, /* 1: No interrupts yet. */ 151 0, /* 2: IVECT */ 152 ZSWR3_RX_8 | ZSWR3_RX_ENABLE, 153 ZSWR4_CLK_X16 | ZSWR4_ONESB | ZSWR4_EVENP, 154 ZSWR5_TX_8 | ZSWR5_TX_ENABLE, 155 0, /* 6: TXSYNC/SYNCLO */ 156 0, /* 7: RXSYNC/SYNCHI */ 157 0, /* 8: alias for data port */ 158 ZSWR9_MASTER_IE | ZSWR9_NO_VECTOR, 159 0, /*10: Misc. TX/RX control bits */ 160 ZSWR11_TXCLK_BAUD | ZSWR11_RXCLK_BAUD, 161 14, /*12: BAUDLO (default=9600) */ 162 0, /*13: BAUDHI (default=9600) */ 163 ZSWR14_BAUD_ENA | ZSWR14_BAUD_FROM_PCLK, 164 ZSWR15_BREAK_IE | ZSWR15_DCD_IE, 165 }; 166 167 struct zschan * 168 zs_get_chan_addr(zs_unit, channel) 169 int zs_unit, channel; 170 { 171 struct zsdevice *addr; 172 struct zschan *zc; 173 174 if (zs_unit >= NZS) 175 return NULL; 176 addr = zsaddr[zs_unit]; 177 if (addr == NULL) 178 addr = zsaddr[zs_unit] = findzs(zs_unit); 179 if (addr == NULL) 180 return NULL; 181 if (channel == 0) { 182 zc = &addr->zs_chan_a; 183 } else { 184 zc = &addr->zs_chan_b; 185 } 186 return (zc); 187 } 188 189 190 /**************************************************************** 191 * Autoconfig 192 ****************************************************************/ 193 194 /* Definition of the driver for autoconfig. */ 195 static int zs_match __P((struct device *, struct cfdata *, void *)); 196 static void zs_attach __P((struct device *, struct device *, void *)); 197 static int zs_print __P((void *, const char *name)); 198 199 struct cfattach zs_ca = { 200 sizeof(struct zsc_softc), zs_match, zs_attach 201 }; 202 203 struct cfdriver zs_cd = { 204 NULL, "zs", DV_DULL 205 }; 206 207 /* Interrupt handlers. */ 208 static int zshard __P((void *)); 209 static int zssoft __P((void *)); 210 static struct intrhand levelhard = { zshard }; 211 static struct intrhand levelsoft = { zssoft }; 212 213 static int zs_get_speed __P((struct zs_chanstate *)); 214 215 216 /* 217 * Is the zs chip present? 218 */ 219 static int 220 zs_match(parent, cf, aux) 221 struct device *parent; 222 struct cfdata *cf; 223 void *aux; 224 { 225 struct confargs *ca = aux; 226 struct romaux *ra = &ca->ca_ra; 227 228 if (strcmp(cf->cf_driver->cd_name, ra->ra_name)) 229 return (0); 230 if ((ca->ca_bustype == BUS_MAIN && !CPU_ISSUN4) || 231 (ca->ca_bustype == BUS_OBIO && CPU_ISSUN4M)) 232 return (getpropint(ra->ra_node, "slave", -2) == cf->cf_unit); 233 ra->ra_len = NBPG; 234 return (probeget(ra->ra_vaddr, 1) != -1); 235 } 236 237 /* 238 * Attach a found zs. 239 * 240 * USE ROM PROPERTIES port-a-ignore-cd AND port-b-ignore-cd FOR 241 * SOFT CARRIER, AND keyboard PROPERTY FOR KEYBOARD/MOUSE? 242 */ 243 static void 244 zs_attach(parent, self, aux) 245 struct device *parent; 246 struct device *self; 247 void *aux; 248 { 249 struct zsc_softc *zsc = (void *) self; 250 struct confargs *ca = aux; 251 struct romaux *ra = &ca->ca_ra; 252 struct zsc_attach_args zsc_args; 253 volatile struct zschan *zc; 254 struct zs_chanstate *cs; 255 int pri, s, zs_unit, channel; 256 static int didintr, prevpri; 257 258 zs_unit = zsc->zsc_dev.dv_unit; 259 260 /* Use the mapping setup by the Sun PROM. */ 261 if (zsaddr[zs_unit] == NULL) 262 zsaddr[zs_unit] = findzs(zs_unit); 263 264 if (ca->ca_bustype==BUS_MAIN) 265 if ((void*)zsaddr[zs_unit] != ra->ra_vaddr) 266 panic("zsattach"); 267 if (ra->ra_nintr != 1) { 268 printf(": expected 1 interrupt, got %d\n", ra->ra_nintr); 269 return; 270 } 271 pri = ra->ra_intr[0].int_pri; 272 printf(" pri %d, softpri %d\n", pri, PIL_TTY); 273 274 /* 275 * Initialize software state for each channel. 276 */ 277 for (channel = 0; channel < 2; channel++) { 278 zsc_args.channel = channel; 279 zsc_args.hwflags = zs_hwflags[zs_unit][channel]; 280 cs = &zsc->zsc_cs_store[channel]; 281 zsc->zsc_cs[channel] = cs; 282 if (zs_unit == zs_console_unit && 283 channel == zs_console_channel) { 284 zs_conschanstate = cs; 285 } 286 287 cs->cs_channel = channel; 288 cs->cs_private = NULL; 289 cs->cs_ops = &zsops_null; 290 cs->cs_brg_clk = PCLK / 16; 291 292 zc = zs_get_chan_addr(zs_unit, channel); 293 cs->cs_reg_csr = &zc->zc_csr; 294 cs->cs_reg_data = &zc->zc_data; 295 296 bcopy(zs_init_reg, cs->cs_creg, 16); 297 bcopy(zs_init_reg, cs->cs_preg, 16); 298 299 /* XXX: Get these from the PROM properties! */ 300 /* XXX: See the mvme167 code. Better. */ 301 if (zsc_args.hwflags & ZS_HWFLAG_CONSOLE) 302 cs->cs_defspeed = zs_get_speed(cs); 303 else 304 cs->cs_defspeed = zs_defspeed[zs_unit][channel]; 305 cs->cs_defcflag = zs_def_cflag; 306 307 /* Make these correspond to cs_defcflag (-crtscts) */ 308 cs->cs_rr0_dcd = ZSRR0_DCD; 309 cs->cs_rr0_cts = 0; 310 cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS; 311 cs->cs_wr5_rts = 0; 312 313 /* 314 * Clear the master interrupt enable. 315 * The INTENA is common to both channels, 316 * so just do it on the A channel. 317 */ 318 if (channel == 0) { 319 zs_write_reg(cs, 9, 0); 320 } 321 322 /* 323 * Look for a child driver for this channel. 324 * The child attach will setup the hardware. 325 */ 326 if (!config_found(self, (void *)&zsc_args, zs_print)) { 327 /* No sub-driver. Just reset it. */ 328 u_char reset = (channel == 0) ? 329 ZSWR9_A_RESET : ZSWR9_B_RESET; 330 s = splhigh(); 331 zs_write_reg(cs, 9, reset); 332 splx(s); 333 } 334 } 335 336 /* 337 * Now safe to install interrupt handlers. Note the arguments 338 * to the interrupt handlers aren't used. Note, we only do this 339 * once since both SCCs interrupt at the same level and vector. 340 */ 341 if (!didintr) { 342 didintr = 1; 343 prevpri = pri; 344 intr_establish(pri, &levelhard); 345 intr_establish(PIL_TTY, &levelsoft); 346 } else if (pri != prevpri) 347 panic("broken zs interrupt scheme"); 348 evcnt_attach(&zsc->zsc_dev, "intr", &zsc->zsc_intrcnt); 349 350 /* 351 * Set the master interrupt enable and interrupt vector. 352 * (common to both channels, do it on A) 353 */ 354 cs = zsc->zsc_cs[0]; 355 s = splhigh(); 356 /* interrupt vector */ 357 zs_write_reg(cs, 2, zs_init_reg[2]); 358 /* master interrupt control (enable) */ 359 zs_write_reg(cs, 9, zs_init_reg[9]); 360 splx(s); 361 362 #if 0 363 /* 364 * XXX: L1A hack - We would like to be able to break into 365 * the debugger during the rest of autoconfiguration, so 366 * lower interrupts just enough to let zs interrupts in. 367 * This is done after both zs devices are attached. 368 */ 369 if (zs_unit == 1) { 370 printf("zs1: enabling zs interrupts\n"); 371 (void)splfd(); /* XXX: splzs - 1 */ 372 } 373 #endif 374 } 375 376 static int 377 zs_print(aux, name) 378 void *aux; 379 const char *name; 380 { 381 struct zsc_attach_args *args = aux; 382 383 if (name != NULL) 384 printf("%s: ", name); 385 386 if (args->channel != -1) 387 printf(" channel %d", args->channel); 388 389 return UNCONF; 390 } 391 392 static volatile int zssoftpending; 393 394 /* 395 * Our ZS chips all share a common, autovectored interrupt, 396 * so we have to look at all of them on each interrupt. 397 */ 398 static int 399 zshard(arg) 400 void *arg; 401 { 402 register struct zsc_softc *zsc; 403 register int unit, rr3, rval, softreq; 404 405 rval = softreq = 0; 406 for (unit = 0; unit < zs_cd.cd_ndevs; unit++) { 407 zsc = zs_cd.cd_devs[unit]; 408 if (zsc == NULL) 409 continue; 410 rr3 = zsc_intr_hard(zsc); 411 /* Count up the interrupts. */ 412 if (rr3) { 413 rval |= rr3; 414 zsc->zsc_intrcnt.ev_count++; 415 } 416 softreq |= zsc->zsc_cs[0]->cs_softreq; 417 softreq |= zsc->zsc_cs[1]->cs_softreq; 418 } 419 420 /* We are at splzs here, so no need to lock. */ 421 if (softreq && (zssoftpending == 0)) { 422 zssoftpending = IE_ZSSOFT; 423 #if defined(SUN4M) 424 if (CPU_ISSUN4M) 425 raise(0, PIL_TTY); 426 else 427 #endif 428 ienab_bis(IE_ZSSOFT); 429 } 430 return (rval); 431 } 432 433 /* 434 * Similar scheme as for zshard (look at all of them) 435 */ 436 static int 437 zssoft(arg) 438 void *arg; 439 { 440 register struct zsc_softc *zsc; 441 register int s, unit; 442 443 /* This is not the only ISR on this IPL. */ 444 if (zssoftpending == 0) 445 return (0); 446 447 /* 448 * The soft intr. bit will be set by zshard only if 449 * the variable zssoftpending is zero. The order of 450 * these next two statements prevents our clearing 451 * the soft intr bit just after zshard has set it. 452 */ 453 /* ienab_bic(IE_ZSSOFT); */ 454 zssoftpending = 0; 455 456 /* Make sure we call the tty layer at spltty. */ 457 s = spltty(); 458 for (unit = 0; unit < zs_cd.cd_ndevs; unit++) { 459 zsc = zs_cd.cd_devs[unit]; 460 if (zsc == NULL) 461 continue; 462 (void) zsc_intr_soft(zsc); 463 } 464 splx(s); 465 return (1); 466 } 467 468 469 /* 470 * Compute the current baud rate given a ZS channel. 471 */ 472 static int 473 zs_get_speed(cs) 474 struct zs_chanstate *cs; 475 { 476 int tconst; 477 478 tconst = zs_read_reg(cs, 12); 479 tconst |= zs_read_reg(cs, 13) << 8; 480 return (TCONST_TO_BPS(cs->cs_brg_clk, tconst)); 481 } 482 483 /* 484 * MD functions for setting the baud rate and control modes. 485 */ 486 int 487 zs_set_speed(cs, bps) 488 struct zs_chanstate *cs; 489 int bps; /* bits per second */ 490 { 491 int tconst, real_bps; 492 493 if (bps == 0) 494 return (0); 495 496 #ifdef DIAGNOSTIC 497 if (cs->cs_brg_clk == 0) 498 panic("zs_set_speed"); 499 #endif 500 501 tconst = BPS_TO_TCONST(cs->cs_brg_clk, bps); 502 if (tconst < 0) 503 return (EINVAL); 504 505 /* Convert back to make sure we can do it. */ 506 real_bps = TCONST_TO_BPS(cs->cs_brg_clk, tconst); 507 508 /* XXX - Allow some tolerance here? */ 509 if (real_bps != bps) 510 return (EINVAL); 511 512 cs->cs_preg[12] = tconst; 513 cs->cs_preg[13] = tconst >> 8; 514 515 /* Caller will stuff the pending registers. */ 516 return (0); 517 } 518 519 int 520 zs_set_modes(cs, cflag) 521 struct zs_chanstate *cs; 522 int cflag; /* bits per second */ 523 { 524 int s; 525 526 /* 527 * Output hardware flow control on the chip is horrendous: 528 * if carrier detect drops, the receiver is disabled, and if 529 * CTS drops, the transmitter is stoped IN MID CHARACTER! 530 * Therefore, NEVER set the HFC bit, and instead use the 531 * status interrupt to detect CTS changes. 532 */ 533 s = splzs(); 534 if ((cflag & (CLOCAL | MDMBUF)) != 0) 535 cs->cs_rr0_dcd = 0; 536 else 537 cs->cs_rr0_dcd = ZSRR0_DCD; 538 if ((cflag & CRTSCTS) != 0) { 539 cs->cs_wr5_dtr = ZSWR5_DTR; 540 cs->cs_wr5_rts = ZSWR5_RTS; 541 cs->cs_rr0_cts = ZSRR0_CTS; 542 } else if ((cflag & CDTRCTS) != 0) { 543 cs->cs_wr5_dtr = 0; 544 cs->cs_wr5_rts = ZSWR5_DTR; 545 cs->cs_rr0_cts = ZSRR0_CTS; 546 } else if ((cflag & MDMBUF) != 0) { 547 cs->cs_wr5_dtr = 0; 548 cs->cs_wr5_rts = ZSWR5_DTR; 549 cs->cs_rr0_cts = ZSRR0_DCD; 550 } else { 551 cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS; 552 cs->cs_wr5_rts = 0; 553 cs->cs_rr0_cts = 0; 554 } 555 splx(s); 556 557 /* Caller will stuff the pending registers. */ 558 return (0); 559 } 560 561 562 /* 563 * Read or write the chip with suitable delays. 564 */ 565 566 u_char 567 zs_read_reg(cs, reg) 568 struct zs_chanstate *cs; 569 u_char reg; 570 { 571 u_char val; 572 573 *cs->cs_reg_csr = reg; 574 ZS_DELAY(); 575 val = *cs->cs_reg_csr; 576 ZS_DELAY(); 577 return val; 578 } 579 580 void 581 zs_write_reg(cs, reg, val) 582 struct zs_chanstate *cs; 583 u_char reg, val; 584 { 585 *cs->cs_reg_csr = reg; 586 ZS_DELAY(); 587 *cs->cs_reg_csr = val; 588 ZS_DELAY(); 589 } 590 591 u_char zs_read_csr(cs) 592 struct zs_chanstate *cs; 593 { 594 register u_char val; 595 596 val = *cs->cs_reg_csr; 597 ZS_DELAY(); 598 return val; 599 } 600 601 void zs_write_csr(cs, val) 602 struct zs_chanstate *cs; 603 u_char val; 604 { 605 *cs->cs_reg_csr = val; 606 ZS_DELAY(); 607 } 608 609 u_char zs_read_data(cs) 610 struct zs_chanstate *cs; 611 { 612 register u_char val; 613 614 val = *cs->cs_reg_data; 615 ZS_DELAY(); 616 return val; 617 } 618 619 void zs_write_data(cs, val) 620 struct zs_chanstate *cs; 621 u_char val; 622 { 623 *cs->cs_reg_data = val; 624 ZS_DELAY(); 625 } 626 627 /**************************************************************** 628 * Console support functions (Sun specific!) 629 * Note: this code is allowed to know about the layout of 630 * the chip registers, and uses that to keep things simple. 631 * XXX - I think I like the mvme167 code better. -gwr 632 ****************************************************************/ 633 634 extern void Debugger __P((void)); 635 void *zs_conschan; 636 637 /* 638 * Handle user request to enter kernel debugger. 639 */ 640 void 641 zs_abort(cs) 642 struct zs_chanstate *cs; 643 { 644 register volatile struct zschan *zc = zs_conschan; 645 int rr0; 646 647 /* Wait for end of break to avoid PROM abort. */ 648 /* XXX - Limit the wait? */ 649 do { 650 rr0 = zc->zc_csr; 651 ZS_DELAY(); 652 } while (rr0 & ZSRR0_BREAK); 653 654 #if defined(KGDB) 655 zskgdb(cs); 656 #elif defined(DDB) 657 Debugger(); 658 #else 659 printf("stopping on keyboard abort\n"); 660 callrom(); 661 #endif 662 } 663 664 /* 665 * Polled input char. 666 */ 667 int 668 zs_getc(arg) 669 void *arg; 670 { 671 register volatile struct zschan *zc = arg; 672 register int s, c, rr0; 673 674 s = splhigh(); 675 /* Wait for a character to arrive. */ 676 do { 677 rr0 = zc->zc_csr; 678 ZS_DELAY(); 679 } while ((rr0 & ZSRR0_RX_READY) == 0); 680 681 c = zc->zc_data; 682 ZS_DELAY(); 683 splx(s); 684 685 /* 686 * This is used by the kd driver to read scan codes, 687 * so don't translate '\r' ==> '\n' here... 688 */ 689 return (c); 690 } 691 692 /* 693 * Polled output char. 694 */ 695 void 696 zs_putc(arg, c) 697 void *arg; 698 int c; 699 { 700 register volatile struct zschan *zc = arg; 701 register int s, rr0; 702 703 s = splhigh(); 704 /* Wait for transmitter to become ready. */ 705 do { 706 rr0 = zc->zc_csr; 707 ZS_DELAY(); 708 } while ((rr0 & ZSRR0_TX_READY) == 0); 709 710 /* 711 * If the transmitter was busy doing regular tty I/O (ZSWR1_TIE on), 712 * defer our output until the transmit interrupt runs. We still 713 * sync with TX_READY so we can get by with a single-char "queue". 714 */ 715 if (zs_conschanstate && (zs_conschanstate->cs_preg[1] & ZSWR1_TIE)) { 716 /* 717 * If a previous held character has not yet gone out, we can 718 * send it now; zsxint() will field the interrupt for our 719 * char, but doesn't care. We're running at sufficiently 720 * high spl for this to work. 721 */ 722 if (zs_conschanstate->cs_heldchar != 0) 723 zc->zc_data = zs_conschanstate->cs_heldchar; 724 zs_conschanstate->cs_heldchar = c; 725 ZS_DELAY(); 726 splx(s); 727 return; 728 } 729 730 zc->zc_data = c; 731 ZS_DELAY(); 732 splx(s); 733 } 734 735 /*****************************************************************/ 736 737 static void zscninit __P((struct consdev *)); 738 static int zscngetc __P((dev_t)); 739 static void zscnputc __P((dev_t, int)); 740 741 /* 742 * Console table shared by ttya, ttyb 743 */ 744 struct consdev consdev_tty = { 745 nullcnprobe, 746 zscninit, 747 zscngetc, 748 zscnputc, 749 nullcnpollc, 750 }; 751 752 static void 753 zscninit(cn) 754 struct consdev *cn; 755 { 756 } 757 758 /* 759 * Polled console input putchar. 760 */ 761 static int 762 zscngetc(dev) 763 dev_t dev; 764 { 765 return (zs_getc(zs_conschan)); 766 } 767 768 /* 769 * Polled console output putchar. 770 */ 771 static void 772 zscnputc(dev, c) 773 dev_t dev; 774 int c; 775 { 776 zs_putc(zs_conschan, c); 777 } 778 779 /*****************************************************************/ 780 781 static void prom_cninit __P((struct consdev *)); 782 static int prom_cngetc __P((dev_t)); 783 static void prom_cnputc __P((dev_t, int)); 784 785 /* 786 * The console is set to this one initially, 787 * which lets us use the PROM until consinit() 788 * is called to select a real console. 789 */ 790 struct consdev consdev_prom = { 791 nullcnprobe, 792 prom_cninit, 793 prom_cngetc, 794 prom_cnputc, 795 nullcnpollc, 796 }; 797 798 /* 799 * The console table pointer is statically initialized 800 * to point to the PROM (output only) table, so that 801 * early calls to printf will work. 802 */ 803 struct consdev *cn_tab = &consdev_prom; 804 805 void 806 nullcnprobe(cn) 807 struct consdev *cn; 808 { 809 } 810 811 static void 812 prom_cninit(cn) 813 struct consdev *cn; 814 { 815 } 816 817 /* 818 * PROM console input putchar. 819 * (dummy - this is output only) 820 */ 821 static int 822 prom_cngetc(dev) 823 dev_t dev; 824 { 825 return (0); 826 } 827 828 /* 829 * PROM console output putchar. 830 */ 831 static void 832 prom_cnputc(dev, c) 833 dev_t dev; 834 int c; 835 { 836 char c0 = (c & 0x7f); 837 838 if (promvec->pv_romvec_vers > 2) 839 (*promvec->pv_v2devops.v2_write) 840 (*promvec->pv_v2bootargs.v2_fd1, &c0, 1); 841 else 842 (*promvec->pv_putchar)(c); 843 } 844 845 /*****************************************************************/ 846 847 extern struct consdev consdev_kd; 848 849 static char *prom_inSrc_name[] = { 850 "keyboard/display", 851 "ttya", "ttyb", 852 "ttyc", "ttyd" }; 853 854 /* 855 * This function replaces sys/dev/cninit.c 856 * Determine which device is the console using 857 * the PROM "input source" and "output sink". 858 */ 859 void 860 consinit() 861 { 862 struct zschan *zc; 863 struct consdev *cn; 864 int channel, zs_unit, zstty_unit; 865 int inSource, outSink; 866 867 if (promvec->pv_romvec_vers > 2) { 868 /* We need to probe the PROM device tree */ 869 register int node,fd; 870 char buffer[128]; 871 register struct nodeops *no; 872 register struct v2devops *op; 873 register char *cp; 874 extern int fbnode; 875 876 inSource = outSink = -1; 877 no = promvec->pv_nodeops; 878 op = &promvec->pv_v2devops; 879 880 node = findroot(); 881 if (no->no_proplen(node, "stdin-path") >= sizeof(buffer)) { 882 printf("consinit: increase buffer size and recompile\n"); 883 goto setup_output; 884 } 885 /* XXX: fix above */ 886 887 no->no_getprop(node, "stdin-path",buffer); 888 889 /* 890 * Open an "instance" of this device. 891 * You'd think it would be appropriate to call v2_close() 892 * on the handle when we're done with it. But that seems 893 * to cause the device to shut down somehow; for the moment, 894 * we simply leave it open... 895 */ 896 if ((fd = op->v2_open(buffer)) == 0 || 897 (node = op->v2_fd_phandle(fd)) == 0) { 898 printf("consinit: bogus stdin path %s.\n",buffer); 899 goto setup_output; 900 } 901 if (no->no_proplen(node,"keyboard") >= 0) { 902 inSource = PROMDEV_KBD; 903 goto setup_output; 904 } 905 if (strcmp(getpropstring(node,"device_type"),"serial") != 0) { 906 /* not a serial, not keyboard. what is it?!? */ 907 inSource = -1; 908 goto setup_output; 909 } 910 /* 911 * At this point we assume the device path is in the form 912 * ....device@x,y:a for ttya and ...device@x,y:b for ttyb. 913 * If it isn't, we defer to the ROM 914 */ 915 cp = buffer; 916 while (*cp) 917 cp++; 918 cp -= 2; 919 #ifdef DEBUG 920 if (cp < buffer) 921 panic("consinit: bad stdin path %s",buffer); 922 #endif 923 /* XXX: only allows tty's a->z, assumes PROMDEV_TTYx contig */ 924 if (cp[0]==':' && cp[1] >= 'a' && cp[1] <= 'z') 925 inSource = PROMDEV_TTYA + (cp[1] - 'a'); 926 /* else use rom */ 927 setup_output: 928 node = findroot(); 929 if (no->no_proplen(node, "stdout-path") >= sizeof(buffer)) { 930 printf("consinit: increase buffer size and recompile\n"); 931 goto setup_console; 932 } 933 /* XXX: fix above */ 934 935 no->no_getprop(node, "stdout-path", buffer); 936 937 if ((fd = op->v2_open(buffer)) == 0 || 938 (node = op->v2_fd_phandle(fd)) == 0) { 939 printf("consinit: bogus stdout path %s.\n",buffer); 940 goto setup_output; 941 } 942 if (strcmp(getpropstring(node,"device_type"),"display") == 0) { 943 /* frame buffer output */ 944 outSink = PROMDEV_SCREEN; 945 fbnode = node; 946 } else if (strcmp(getpropstring(node,"device_type"), "serial") 947 != 0) { 948 /* not screen, not serial. Whatzit? */ 949 outSink = -1; 950 } else { /* serial console. which? */ 951 /* 952 * At this point we assume the device path is in the 953 * form: 954 * ....device@x,y:a for ttya, etc. 955 * If it isn't, we defer to the ROM 956 */ 957 cp = buffer; 958 while (*cp) 959 cp++; 960 cp -= 2; 961 #ifdef DEBUG 962 if (cp < buffer) 963 panic("consinit: bad stdout path %s",buffer); 964 #endif 965 /* XXX: only allows tty's a->z, assumes PROMDEV_TTYx contig */ 966 if (cp[0]==':' && cp[1] >= 'a' && cp[1] <= 'z') 967 outSink = PROMDEV_TTYA + (cp[1] - 'a'); 968 else outSink = -1; 969 } 970 } else { 971 inSource = *promvec->pv_stdin; 972 outSink = *promvec->pv_stdout; 973 } 974 975 setup_console: 976 977 if (inSource != outSink) { 978 printf("cninit: mismatched PROM output selector\n"); 979 } 980 981 switch (inSource) { 982 default: 983 printf("cninit: invalid inSource=%d\n", inSource); 984 callrom(); 985 inSource = PROMDEV_KBD; 986 /* fall through */ 987 988 case 0: /* keyboard/display */ 989 #if NKBD > 0 990 zs_unit = 1; /* XXX - config info! */ 991 channel = 0; 992 cn = &consdev_kd; 993 /* Set cn_dev, cn_pri in kd.c */ 994 break; 995 #else /* NKBD */ 996 printf("cninit: kdb/display not configured\n"); 997 callrom(); 998 inSource = PROMDEV_TTYA; 999 /* fall through */ 1000 #endif /* NKBD */ 1001 1002 case PROMDEV_TTYA: 1003 case PROMDEV_TTYB: 1004 zstty_unit = inSource - PROMDEV_TTYA; 1005 zs_unit = 0; /* XXX - config info! */ 1006 channel = zstty_unit & 1; 1007 cn = &consdev_tty; 1008 cn->cn_dev = makedev(zs_major, zstty_unit); 1009 cn->cn_pri = CN_REMOTE; 1010 zs_console_unit = zs_unit; 1011 zs_console_channel = channel; 1012 break; 1013 1014 } 1015 /* Now that inSource has been validated, print it. */ 1016 printf("console is %s\n", prom_inSrc_name[inSource]); 1017 1018 zc = zs_get_chan_addr(zs_unit, channel); 1019 if (zc == NULL) { 1020 printf("cninit: zs not mapped.\n"); 1021 return; 1022 } 1023 zs_conschan = zc; 1024 zs_hwflags[zs_unit][channel] = ZS_HWFLAG_CONSOLE; 1025 cn_tab = cn; 1026 (*cn->cn_init)(cn); 1027 #ifdef KGDB 1028 zs_kgdb_init(); 1029 #endif 1030 } 1031