1 /* $NetBSD: zs.c,v 1.78 2006/10/05 14:46:11 tsutsui 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/cdefs.h> 48 __KERNEL_RCSID(0, "$NetBSD: zs.c,v 1.78 2006/10/05 14:46:11 tsutsui Exp $"); 49 50 #include "opt_kgdb.h" 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/conf.h> 55 #include <sys/device.h> 56 #include <sys/file.h> 57 #include <sys/ioctl.h> 58 #include <sys/kernel.h> 59 #include <sys/proc.h> 60 #include <sys/tty.h> 61 #include <sys/time.h> 62 #include <sys/syslog.h> 63 64 #include <uvm/uvm_extern.h> 65 66 #include <machine/autoconf.h> 67 #include <machine/cpu.h> 68 #include <machine/mon.h> 69 #include <machine/z8530var.h> 70 71 #include <sun3/sun3/machdep.h> 72 #ifdef _SUN3X_ 73 #include <sun3/sun3x/obio.h> 74 #else 75 #include <sun3/sun3/obio.h> 76 #endif 77 #include <sun3/dev/zs_cons.h> 78 79 #include <dev/cons.h> 80 #include <dev/ic/z8530reg.h> 81 82 #include "kbd.h" /* NKBD */ 83 #include "zsc.h" /* NZSC */ 84 #define NZS NZSC 85 86 /* Make life easier for the initialized arrays here. */ 87 #if NZS < 2 88 #undef NZS 89 #define NZS 2 90 #endif 91 92 /* 93 * Some warts needed by z8530tty.c - 94 * The default parity REALLY needs to be the same as the PROM uses, 95 * or you can not see messages done with printf during boot-up... 96 */ 97 int zs_def_cflag = (CREAD | CS8 | HUPCL); 98 99 /* 100 * The Sun3 provides a 4.9152 MHz clock to the ZS chips. 101 */ 102 #define PCLK (9600 * 512) /* PCLK pin input clock rate */ 103 104 /* 105 * Define interrupt levels. 106 */ 107 #define ZSHARD_PRI 6 /* Wired on the CPU board... */ 108 #define ZSSOFT_PRI _IPL_SOFT_LEVEL3 /* Want tty pri (4) but this is OK. */ 109 110 #define ZS_DELAY() delay(2) 111 112 /* The layout of this is hardware-dependent (padding, order). */ 113 struct zschan { 114 volatile u_char zc_csr; /* ctrl,status, and indirect access */ 115 u_char zc_xxx0; 116 volatile u_char zc_data; /* data */ 117 u_char zc_xxx1; 118 }; 119 struct zsdevice { 120 /* Yes, they are backwards. */ 121 struct zschan zs_chan_b; 122 struct zschan zs_chan_a; 123 }; 124 125 126 /* Default OBIO addresses. */ 127 static int zs_physaddr[NZS] = { 128 OBIO_ZS_KBD_MS, 129 OBIO_ZS_TTY_AB }; 130 131 /* Saved PROM mappings */ 132 static struct zsdevice *zsaddr[NZS]; 133 134 /* Flags from cninit() */ 135 static int zs_hwflags[NZS][2]; 136 137 /* Default speed for each channel */ 138 static int zs_defspeed[NZS][2] = { 139 { 1200, /* keyboard */ 140 1200 }, /* mouse */ 141 { 9600, /* ttya */ 142 9600 }, /* ttyb */ 143 }; 144 145 static u_char zs_init_reg[16] = { 146 0, /* 0: CMD (reset, etc.) */ 147 0, /* 1: No interrupts yet. */ 148 0x18 + ZSHARD_PRI, /* IVECT */ 149 ZSWR3_RX_8 | ZSWR3_RX_ENABLE, 150 ZSWR4_CLK_X16 | ZSWR4_ONESB | ZSWR4_EVENP, 151 ZSWR5_TX_8 | ZSWR5_TX_ENABLE, 152 0, /* 6: TXSYNC/SYNCLO */ 153 0, /* 7: RXSYNC/SYNCHI */ 154 0, /* 8: alias for data port */ 155 ZSWR9_MASTER_IE, 156 0, /*10: Misc. TX/RX control bits */ 157 ZSWR11_TXCLK_BAUD | ZSWR11_RXCLK_BAUD, 158 ((PCLK/32)/9600)-2, /*12: BAUDLO (default=9600) */ 159 0, /*13: BAUDHI (default=9600) */ 160 ZSWR14_BAUD_ENA | ZSWR14_BAUD_FROM_PCLK, 161 ZSWR15_BREAK_IE, 162 }; 163 164 165 /* Find PROM mappings (for console support). */ 166 void 167 zs_init(void) 168 { 169 vaddr_t va; 170 int i; 171 172 for (i = 0; i < NZS; i++) { 173 if (find_prom_map(zs_physaddr[i], PMAP_OBIO, 174 sizeof(struct zschan), &va) == 0) 175 zsaddr[i] = (void *)va; 176 } 177 } 178 179 struct zschan * 180 zs_get_chan_addr(int zs_unit, int channel) 181 { 182 struct zsdevice *addr; 183 struct zschan *zc; 184 185 if (zs_unit >= NZS) 186 return NULL; 187 addr = zsaddr[zs_unit]; 188 if (addr == NULL) 189 return NULL; 190 if (channel == 0) { 191 zc = &addr->zs_chan_a; 192 } else { 193 zc = &addr->zs_chan_b; 194 } 195 return (zc); 196 } 197 198 199 /**************************************************************** 200 * Autoconfig 201 ****************************************************************/ 202 203 /* Definition of the driver for autoconfig. */ 204 static int zs_match(struct device *, struct cfdata *, void *); 205 static void zs_attach(struct device *, struct device *, void *); 206 static int zs_print(void *, const char *); 207 208 CFATTACH_DECL(zsc, sizeof(struct zsc_softc), 209 zs_match, zs_attach, NULL, NULL); 210 211 extern struct cfdriver zsc_cd; 212 213 static int zshard(void *); 214 static void zssoft(void *); 215 static int zs_get_speed(struct zs_chanstate *); 216 217 218 /* 219 * Is the zs chip present? 220 */ 221 static int 222 zs_match(struct device *parent, struct cfdata *cf, void *aux) 223 { 224 struct confargs *ca = aux; 225 int unit; 226 void *va; 227 228 /* 229 * This driver only supports its wired-in mappings, 230 * because the console support depends on those. 231 */ 232 if (ca->ca_paddr == zs_physaddr[0]) { 233 unit = 0; 234 } else if (ca->ca_paddr == zs_physaddr[1]) { 235 unit = 1; 236 } else { 237 return (0); 238 } 239 240 /* Make sure zs_init() found mappings. */ 241 va = zsaddr[unit]; 242 if (va == NULL) 243 return (0); 244 245 /* This returns -1 on a fault (bus error). */ 246 if (peek_byte(va) == -1) 247 return (0); 248 249 /* Default interrupt priority (always splbio==2) */ 250 if (ca->ca_intpri == -1) 251 ca->ca_intpri = ZSHARD_PRI; 252 253 return (1); 254 } 255 256 /* 257 * Attach a found zs. 258 * 259 * Match slave number to zs unit number, so that misconfiguration will 260 * not set up the keyboard as ttya, etc. 261 */ 262 static void 263 zs_attach(struct device *parent, struct device *self, void *aux) 264 { 265 struct zsc_softc *zsc = (void *) self; 266 struct confargs *ca = aux; 267 struct zsc_attach_args zsc_args; 268 volatile struct zschan *zc; 269 struct zs_chanstate *cs; 270 int s, zs_unit, channel; 271 static int didintr; 272 273 zs_unit = device_unit(&zsc->zsc_dev); 274 275 printf(": (softpri %d)\n", ZSSOFT_PRI); 276 277 /* Use the mapping setup by the Sun PROM. */ 278 if (zsaddr[zs_unit] == NULL) 279 panic("zs_attach: zs%d not mapped", zs_unit); 280 281 /* 282 * Initialize software state for each channel. 283 */ 284 for (channel = 0; channel < 2; channel++) { 285 zsc_args.channel = channel; 286 zsc_args.hwflags = zs_hwflags[zs_unit][channel]; 287 cs = &zsc->zsc_cs_store[channel]; 288 zsc->zsc_cs[channel] = cs; 289 290 simple_lock_init(&cs->cs_lock); 291 cs->cs_channel = channel; 292 cs->cs_private = NULL; 293 cs->cs_ops = &zsops_null; 294 cs->cs_brg_clk = PCLK / 16; 295 296 zc = zs_get_chan_addr(zs_unit, channel); 297 cs->cs_reg_csr = &zc->zc_csr; 298 cs->cs_reg_data = &zc->zc_data; 299 300 memcpy(cs->cs_creg, zs_init_reg, 16); 301 memcpy(cs->cs_preg, zs_init_reg, 16); 302 303 /* XXX: Get these from the EEPROM instead? */ 304 /* XXX: See the mvme167 code. Better. */ 305 if (zsc_args.hwflags & ZS_HWFLAG_CONSOLE) 306 cs->cs_defspeed = zs_get_speed(cs); 307 else 308 cs->cs_defspeed = zs_defspeed[zs_unit][channel]; 309 cs->cs_defcflag = zs_def_cflag; 310 311 /* Make these correspond to cs_defcflag (-crtscts) */ 312 cs->cs_rr0_dcd = ZSRR0_DCD; 313 cs->cs_rr0_cts = 0; 314 cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS; 315 cs->cs_wr5_rts = 0; 316 317 /* 318 * Clear the master interrupt enable. 319 * The INTENA is common to both channels, 320 * so just do it on the A channel. 321 */ 322 if (channel == 0) { 323 zs_write_reg(cs, 9, 0); 324 } 325 326 /* 327 * Look for a child driver for this channel. 328 * The child attach will setup the hardware. 329 */ 330 if (!config_found(self, (void *)&zsc_args, zs_print)) { 331 /* No sub-driver. Just reset it. */ 332 u_char reset = (channel == 0) ? 333 ZSWR9_A_RESET : ZSWR9_B_RESET; 334 s = splhigh(); 335 zs_write_reg(cs, 9, reset); 336 splx(s); 337 } 338 } 339 340 /* 341 * Now safe to install interrupt handlers. Note the arguments 342 * to the interrupt handlers aren't used. Note, we only do this 343 * once since both SCCs interrupt at the same level and vector. 344 */ 345 if (!didintr) { 346 didintr = 1; 347 isr_add_autovect(zshard, NULL, ca->ca_intpri); 348 } 349 zsc->zs_si = softintr_establish(IPL_SOFTSERIAL, zssoft, zsc); 350 /* XXX; evcnt_attach() ? */ 351 352 /* 353 * Set the master interrupt enable and interrupt vector. 354 * (common to both channels, do it on A) 355 */ 356 cs = zsc->zsc_cs[0]; 357 s = splhigh(); 358 /* interrupt vector */ 359 zs_write_reg(cs, 2, zs_init_reg[2]); 360 /* master interrupt control (enable) */ 361 zs_write_reg(cs, 9, zs_init_reg[9]); 362 splx(s); 363 364 /* 365 * XXX: L1A hack - We would like to be able to break into 366 * the debugger during the rest of autoconfiguration, so 367 * lower interrupts just enough to let zs interrupts in. 368 * This is done after both zs devices are attached. 369 */ 370 if (zs_unit == 1) { 371 (void)spl5(); /* splzs - 1 */ 372 } 373 } 374 375 static int 376 zs_print(void *aux, const char *name) 377 { 378 struct zsc_attach_args *args = aux; 379 380 if (name != NULL) 381 aprint_normal("%s: ", name); 382 383 if (args->channel != -1) 384 aprint_normal(" channel %d", args->channel); 385 386 return UNCONF; 387 } 388 389 /* 390 * Our ZS chips all share a common, autovectored interrupt, 391 * so we have to look at all of them on each interrupt. 392 */ 393 static int 394 zshard(void *arg) 395 { 396 struct zsc_softc *zsc; 397 int unit, rval, softreq; 398 399 rval = 0; 400 for (unit = 0; unit < zsc_cd.cd_ndevs; unit++) { 401 zsc = zsc_cd.cd_devs[unit]; 402 if (zsc == NULL) 403 continue; 404 rval |= zsc_intr_hard(zsc); 405 softreq = zsc->zsc_cs[0]->cs_softreq; 406 softreq |= zsc->zsc_cs[1]->cs_softreq; 407 if (softreq) 408 softintr_schedule(zsc->zs_si); 409 } 410 411 return (rval); 412 } 413 414 /* 415 * Similar scheme as for zshard (look at all of them) 416 */ 417 static void 418 zssoft(void *arg) 419 { 420 struct zsc_softc *zsc = arg; 421 int s; 422 423 /* Make sure we call the tty layer at spltty. */ 424 s = spltty(); 425 (void)zsc_intr_soft(zsc); 426 splx(s); 427 } 428 429 430 /* 431 * Compute the current baud rate given a ZS channel. 432 */ 433 static int 434 zs_get_speed(struct zs_chanstate *cs) 435 { 436 int tconst; 437 438 tconst = zs_read_reg(cs, 12); 439 tconst |= zs_read_reg(cs, 13) << 8; 440 return (TCONST_TO_BPS(cs->cs_brg_clk, tconst)); 441 } 442 443 /* 444 * MD functions for setting the baud rate and control modes. 445 */ 446 int 447 zs_set_speed(struct zs_chanstate *cs, int bps) 448 { 449 int tconst, real_bps; 450 451 if (bps == 0) 452 return (0); 453 454 #ifdef DIAGNOSTIC 455 if (cs->cs_brg_clk == 0) 456 panic("zs_set_speed"); 457 #endif 458 459 tconst = BPS_TO_TCONST(cs->cs_brg_clk, bps); 460 if (tconst < 0) 461 return (EINVAL); 462 463 /* Convert back to make sure we can do it. */ 464 real_bps = TCONST_TO_BPS(cs->cs_brg_clk, tconst); 465 466 /* XXX - Allow some tolerance here? */ 467 if (real_bps != bps) 468 return (EINVAL); 469 470 cs->cs_preg[12] = tconst; 471 cs->cs_preg[13] = tconst >> 8; 472 473 /* Caller will stuff the pending registers. */ 474 return (0); 475 } 476 477 int 478 zs_set_modes(struct zs_chanstate *cs, int cflag /* bits per second */) 479 { 480 int s; 481 482 /* 483 * Output hardware flow control on the chip is horrendous: 484 * if carrier detect drops, the receiver is disabled, and if 485 * CTS drops, the transmitter is stoped IN MID CHARACTER! 486 * Therefore, NEVER set the HFC bit, and instead use the 487 * status interrupt to detect CTS changes. 488 */ 489 s = splzs(); 490 cs->cs_rr0_pps = 0; 491 if ((cflag & (CLOCAL | MDMBUF)) != 0) { 492 cs->cs_rr0_dcd = 0; 493 if ((cflag & MDMBUF) == 0) 494 cs->cs_rr0_pps = ZSRR0_DCD; 495 } else 496 cs->cs_rr0_dcd = ZSRR0_DCD; 497 if ((cflag & CRTSCTS) != 0) { 498 cs->cs_wr5_dtr = ZSWR5_DTR; 499 cs->cs_wr5_rts = ZSWR5_RTS; 500 cs->cs_rr0_cts = ZSRR0_CTS; 501 } else if ((cflag & MDMBUF) != 0) { 502 cs->cs_wr5_dtr = 0; 503 cs->cs_wr5_rts = ZSWR5_DTR; 504 cs->cs_rr0_cts = ZSRR0_DCD; 505 } else { 506 cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS; 507 cs->cs_wr5_rts = 0; 508 cs->cs_rr0_cts = 0; 509 } 510 splx(s); 511 512 /* Caller will stuff the pending registers. */ 513 return (0); 514 } 515 516 517 /* 518 * Read or write the chip with suitable delays. 519 */ 520 521 u_char 522 zs_read_reg(struct zs_chanstate *cs, u_char reg) 523 { 524 u_char val; 525 526 *cs->cs_reg_csr = reg; 527 ZS_DELAY(); 528 val = *cs->cs_reg_csr; 529 ZS_DELAY(); 530 return val; 531 } 532 533 void 534 zs_write_reg(struct zs_chanstate *cs, u_char reg, u_char val) 535 { 536 *cs->cs_reg_csr = reg; 537 ZS_DELAY(); 538 *cs->cs_reg_csr = val; 539 ZS_DELAY(); 540 } 541 542 u_char 543 zs_read_csr(struct zs_chanstate *cs) 544 { 545 u_char val; 546 547 val = *cs->cs_reg_csr; 548 ZS_DELAY(); 549 return val; 550 } 551 552 void 553 zs_write_csr(struct zs_chanstate *cs, u_char val) 554 { 555 *cs->cs_reg_csr = val; 556 ZS_DELAY(); 557 } 558 559 u_char 560 zs_read_data(struct zs_chanstate *cs) 561 { 562 u_char val; 563 564 val = *cs->cs_reg_data; 565 ZS_DELAY(); 566 return val; 567 } 568 569 void 570 zs_write_data(struct zs_chanstate *cs, u_char val) 571 { 572 *cs->cs_reg_data = val; 573 ZS_DELAY(); 574 } 575 576 /**************************************************************** 577 * Console support functions (Sun3 specific!) 578 * Note: this code is allowed to know about the layout of 579 * the chip registers, and uses that to keep things simple. 580 * XXX - I think I like the mvme167 code better. -gwr 581 ****************************************************************/ 582 583 void *zs_conschan; 584 585 /* 586 * Handle user request to enter kernel debugger. 587 */ 588 void 589 zs_abort(struct zs_chanstate *cs) 590 { 591 volatile struct zschan *zc = zs_conschan; 592 int rr0; 593 594 /* Wait for end of break to avoid PROM abort. */ 595 /* XXX - Limit the wait? */ 596 do { 597 rr0 = zc->zc_csr; 598 ZS_DELAY(); 599 } while (rr0 & ZSRR0_BREAK); 600 601 /* This is always available on the Sun3. */ 602 Debugger(); 603 } 604 605 /* 606 * Polled input char. 607 */ 608 int 609 zs_getc(void *arg) 610 { 611 volatile struct zschan *zc = arg; 612 int s, c, rr0; 613 614 s = splhigh(); 615 /* Wait for a character to arrive. */ 616 do { 617 rr0 = zc->zc_csr; 618 ZS_DELAY(); 619 } while ((rr0 & ZSRR0_RX_READY) == 0); 620 621 c = zc->zc_data; 622 ZS_DELAY(); 623 splx(s); 624 625 /* 626 * This is used by the kd driver to read scan codes, 627 * so don't translate '\r' ==> '\n' here... 628 */ 629 return (c); 630 } 631 632 /* 633 * Polled output char. 634 */ 635 void 636 zs_putc(void *arg, int c) 637 { 638 volatile struct zschan *zc = arg; 639 int s, rr0; 640 641 s = splhigh(); 642 /* Wait for transmitter to become ready. */ 643 do { 644 rr0 = zc->zc_csr; 645 ZS_DELAY(); 646 } while ((rr0 & ZSRR0_TX_READY) == 0); 647 648 zc->zc_data = c; 649 ZS_DELAY(); 650 splx(s); 651 } 652 653 /*****************************************************************/ 654 655 static void zscninit(struct consdev *); 656 static int zscngetc(dev_t); 657 static void zscnputc(dev_t, int); 658 659 /* 660 * Console table shared by ttya, ttyb 661 */ 662 struct consdev consdev_tty = { 663 nullcnprobe, 664 zscninit, 665 zscngetc, 666 zscnputc, 667 nullcnpollc, 668 NULL, 669 }; 670 671 static void 672 zscninit(struct consdev *cn) 673 { 674 } 675 676 /* 677 * Polled console input putchar. 678 */ 679 static int 680 zscngetc(dev_t dev) 681 { 682 return (zs_getc(zs_conschan)); 683 } 684 685 /* 686 * Polled console output putchar. 687 */ 688 static void 689 zscnputc(dev_t dev, int c) 690 { 691 zs_putc(zs_conschan, c); 692 } 693 694 /*****************************************************************/ 695 696 static void prom_cninit(struct consdev *); 697 static int prom_cngetc(dev_t); 698 static void prom_cnputc(dev_t, int); 699 700 /* 701 * The console is set to this one initially, 702 * which lets us use the PROM until consinit() 703 * is called to select a real console. 704 */ 705 struct consdev consdev_prom = { 706 nullcnprobe, 707 prom_cninit, 708 prom_cngetc, 709 prom_cnputc, 710 nullcnpollc, 711 }; 712 713 /* 714 * The console table pointer is statically initialized 715 * to point to the PROM (output only) table, so that 716 * early calls to printf will work. 717 */ 718 struct consdev *cn_tab = &consdev_prom; 719 720 void 721 nullcnprobe(struct consdev *cn) 722 { 723 } 724 725 static void 726 prom_cninit(struct consdev *cn) 727 { 728 } 729 730 /* 731 * PROM console input putchar. 732 * (dummy - this is output only) 733 */ 734 static int 735 prom_cngetc(dev_t dev) 736 { 737 return (0); 738 } 739 740 /* 741 * PROM console output putchar. 742 */ 743 static void 744 prom_cnputc(dev_t dev, int c) 745 { 746 (*romVectorPtr->putChar)(c & 0x7f); 747 } 748 749 /*****************************************************************/ 750 751 extern struct consdev consdev_kd; 752 753 static struct { 754 int zs_unit, channel; 755 } zstty_conf[NZS*2] = { 756 /* XXX: knowledge from the config file here... */ 757 { 1, 0 }, /* ttya */ 758 { 1, 1 }, /* ttyb */ 759 { 0, 0 }, /* ttyc */ 760 { 0, 1 }, /* ttyd */ 761 }; 762 763 static const char *prom_inSrc_name[] = { 764 "keyboard/display", 765 "ttya", "ttyb", 766 "ttyc", "ttyd" }; 767 768 /* 769 * This function replaces sys/dev/cninit.c 770 * Determine which device is the console using 771 * the PROM "input source" and "output sink". 772 */ 773 void 774 cninit(void) 775 { 776 struct sunromvec *v; 777 struct zschan *zc; 778 struct consdev *cn; 779 int channel, zs_unit, zstty_unit; 780 u_char inSource, outSink; 781 extern const struct cdevsw zstty_cdevsw; 782 783 /* Get the zs driver ready for console duty. */ 784 zs_init(); 785 786 v = romVectorPtr; 787 inSource = *v->inSource; 788 outSink = *v->outSink; 789 if (inSource != outSink) { 790 mon_printf("cninit: mismatched PROM output selector\n"); 791 } 792 793 switch (inSource) { 794 default: 795 mon_printf("cninit: invalid inSource=%d\n", inSource); 796 sunmon_abort(); 797 inSource = 0; 798 /* fall through */ 799 800 case 0: /* keyboard/display */ 801 #if NKBD > 0 802 zs_unit = 0; 803 channel = 0; 804 cn = &consdev_kd; 805 /* Set cn_dev, cn_pri in kd.c */ 806 break; 807 #else /* NKBD */ 808 mon_printf("cninit: kdb/display not configured\n"); 809 sunmon_abort(); 810 inSource = 1; 811 /* fall through */ 812 #endif /* NKBD */ 813 814 case 1: /* ttya */ 815 case 2: /* ttyb */ 816 case 3: /* ttyc (rewired keyboard connector) */ 817 case 4: /* ttyd (rewired mouse connector) */ 818 zstty_unit = inSource - 1; 819 zs_unit = zstty_conf[zstty_unit].zs_unit; 820 channel = zstty_conf[zstty_unit].channel; 821 cn = &consdev_tty; 822 cn->cn_dev = makedev(cdevsw_lookup_major(&zstty_cdevsw), 823 zstty_unit); 824 cn->cn_pri = CN_REMOTE; 825 break; 826 827 } 828 /* Now that inSource has been validated, print it. */ 829 mon_printf("console is %s\n", prom_inSrc_name[inSource]); 830 831 zc = zs_get_chan_addr(zs_unit, channel); 832 if (zc == NULL) { 833 mon_printf("cninit: zs not mapped.\n"); 834 return; 835 } 836 zs_conschan = zc; 837 zs_hwflags[zs_unit][channel] = ZS_HWFLAG_CONSOLE; 838 cn_tab = cn; 839 (*cn->cn_init)(cn); 840 #ifdef KGDB 841 zs_kgdb_init(); 842 #endif 843 } 844