1 /* $NetBSD: zs.c,v 1.108 2007/11/27 21:56:06 ad 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 1.108 2007/11/27 21:56:06 ad Exp $"); 49 50 #include "opt_ddb.h" 51 #include "opt_kgdb.h" 52 #include "opt_sparc_arch.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/conf.h> 57 #include <sys/device.h> 58 #include <sys/file.h> 59 #include <sys/ioctl.h> 60 #include <sys/kernel.h> 61 #include <sys/proc.h> 62 #include <sys/tty.h> 63 #include <sys/time.h> 64 #include <sys/syslog.h> 65 #include <sys/intr.h> 66 67 #include <machine/bsd_openprom.h> 68 #include <machine/autoconf.h> 69 #include <machine/eeprom.h> 70 #include <machine/psl.h> 71 #include <machine/z8530var.h> 72 73 #include <dev/cons.h> 74 #include <dev/ic/z8530reg.h> 75 76 #include <sparc/sparc/vaddrs.h> 77 #include <sparc/sparc/auxreg.h> 78 #include <sparc/sparc/auxiotwo.h> 79 #include <sparc/dev/cons.h> 80 #include <dev/sun/kbd_ms_ttyvar.h> 81 82 #include "kbd.h" 83 #include "ms.h" 84 #include "wskbd.h" 85 86 /* 87 * Some warts needed by z8530tty.c - 88 * The default parity REALLY needs to be the same as the PROM uses, 89 * or you can not see messages done with printf during boot-up... 90 */ 91 int zs_def_cflag = (CREAD | CS8 | HUPCL); 92 93 /* 94 * The Sun provides a 4.9152 MHz clock to the ZS chips. 95 */ 96 #define PCLK (9600 * 512) /* PCLK pin input clock rate */ 97 98 #define ZS_DELAY() (CPU_ISSUN4C ? (0) : delay(2)) 99 100 /* The layout of this is hardware-dependent (padding, order). */ 101 struct zschan { 102 volatile u_char zc_csr; /* ctrl,status, and indirect access */ 103 u_char zc_xxx0; 104 volatile u_char zc_data; /* data */ 105 u_char zc_xxx1; 106 }; 107 struct zsdevice { 108 /* Yes, they are backwards. */ 109 struct zschan zs_chan_b; 110 struct zschan zs_chan_a; 111 }; 112 113 /* ZS channel used as the console device (if any) */ 114 void *zs_conschan_get, *zs_conschan_put; 115 116 static u_char zs_init_reg[16] = { 117 0, /* 0: CMD (reset, etc.) */ 118 0, /* 1: No interrupts yet. */ 119 0, /* 2: IVECT */ 120 ZSWR3_RX_8 | ZSWR3_RX_ENABLE, 121 ZSWR4_CLK_X16 | ZSWR4_ONESB | ZSWR4_EVENP, 122 ZSWR5_TX_8 | ZSWR5_TX_ENABLE, 123 0, /* 6: TXSYNC/SYNCLO */ 124 0, /* 7: RXSYNC/SYNCHI */ 125 0, /* 8: alias for data port */ 126 ZSWR9_MASTER_IE | ZSWR9_NO_VECTOR, 127 0, /*10: Misc. TX/RX control bits */ 128 ZSWR11_TXCLK_BAUD | ZSWR11_RXCLK_BAUD, 129 ((PCLK/32)/9600)-2, /*12: BAUDLO (default=9600) */ 130 0, /*13: BAUDHI (default=9600) */ 131 ZSWR14_BAUD_ENA | ZSWR14_BAUD_FROM_PCLK, 132 ZSWR15_BREAK_IE, 133 }; 134 135 /* Console ops */ 136 static int zscngetc(dev_t); 137 static void zscnputc(dev_t, int); 138 static void zscnpollc(dev_t, int); 139 140 struct consdev zs_consdev = { 141 NULL, 142 NULL, 143 zscngetc, 144 zscnputc, 145 zscnpollc, 146 NULL, 147 }; 148 149 150 /**************************************************************** 151 * Autoconfig 152 ****************************************************************/ 153 154 /* Definition of the driver for autoconfig. */ 155 static int zs_match_mainbus(struct device *, struct cfdata *, void *); 156 static int zs_match_obio(struct device *, struct cfdata *, void *); 157 static void zs_attach_mainbus(struct device *, struct device *, void *); 158 static void zs_attach_obio(struct device *, struct device *, void *); 159 160 #if defined(SUN4D) 161 #include <sparc/dev/bootbusvar.h> 162 163 static int zs_match_bootbus(struct device *, struct cfdata *, void *); 164 static void zs_attach_bootbus(struct device *, struct device *, void *); 165 166 CFATTACH_DECL(zs_bootbus, sizeof(struct zsc_softc), 167 zs_match_bootbus, zs_attach_bootbus, NULL, NULL); 168 #endif /* SUN4D */ 169 170 static void zs_attach(struct zsc_softc *, struct zsdevice *, int); 171 static int zs_print(void *, const char *name); 172 173 CFATTACH_DECL(zs_mainbus, sizeof(struct zsc_softc), 174 zs_match_mainbus, zs_attach_mainbus, NULL, NULL); 175 176 CFATTACH_DECL(zs_obio, sizeof(struct zsc_softc), 177 zs_match_obio, zs_attach_obio, NULL, NULL); 178 179 extern struct cfdriver zs_cd; 180 181 /* softintr(9) cookie, shared by all instances of this driver */ 182 static void *zs_sicookie; 183 184 /* Interrupt handlers. */ 185 static int zshard(void *); 186 static void zssoft(void *); 187 188 static int zs_get_speed(struct zs_chanstate *); 189 190 /* Console device support */ 191 static int zs_console_flags(int, int, int); 192 193 /* Power management hooks */ 194 int zs_enable(struct zs_chanstate *); 195 void zs_disable(struct zs_chanstate *); 196 197 198 /* XXX from dev/ic/z8530tty.c */ 199 extern struct tty *zstty_get_tty_from_dev(struct device *); 200 201 /* 202 * Is the zs chip present? 203 */ 204 static int 205 zs_match_mainbus(struct device *parent, struct cfdata *cf, void *aux) 206 { 207 struct mainbus_attach_args *ma = aux; 208 209 if (strcmp(cf->cf_name, ma->ma_name) != 0) 210 return (0); 211 212 return (1); 213 } 214 215 static int 216 zs_match_obio(struct device *parent, struct cfdata *cf, void *aux) 217 { 218 union obio_attach_args *uoba = aux; 219 struct obio4_attach_args *oba; 220 221 if (uoba->uoba_isobio4 == 0) { 222 struct sbus_attach_args *sa = &uoba->uoba_sbus; 223 224 if (strcmp(cf->cf_name, sa->sa_name) != 0) 225 return (0); 226 227 return (1); 228 } 229 230 oba = &uoba->uoba_oba4; 231 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 232 1, 0, 0, NULL, NULL)); 233 } 234 235 #if defined(SUN4D) 236 static int 237 zs_match_bootbus(struct device *parent, struct cfdata *cf, void *aux) 238 { 239 struct bootbus_attach_args *baa = aux; 240 241 return (strcmp(cf->cf_name, baa->ba_name) == 0); 242 } 243 #endif /* SUN4D */ 244 245 static void 246 zs_attach_mainbus(struct device *parent, struct device *self, void *aux) 247 { 248 struct zsc_softc *zsc = (void *) self; 249 struct mainbus_attach_args *ma = aux; 250 251 zsc->zsc_bustag = ma->ma_bustag; 252 zsc->zsc_dmatag = ma->ma_dmatag; 253 zsc->zsc_promunit = prom_getpropint(ma->ma_node, "slave", -2); 254 zsc->zsc_node = ma->ma_node; 255 256 /* 257 * For machines with zs on mainbus (all sun4c models), we expect 258 * the device registers to be mapped by the PROM. 259 */ 260 zs_attach(zsc, ma->ma_promvaddr, ma->ma_pri); 261 } 262 263 static void 264 zs_attach_obio(struct device *parent, struct device *self, void *aux) 265 { 266 struct zsc_softc *zsc = (void *) self; 267 union obio_attach_args *uoba = aux; 268 269 if (uoba->uoba_isobio4 == 0) { 270 struct sbus_attach_args *sa = &uoba->uoba_sbus; 271 void *va; 272 struct zs_chanstate *cs; 273 int channel; 274 275 if (sa->sa_nintr == 0) { 276 printf(" no interrupt lines\n"); 277 return; 278 } 279 280 /* 281 * Some sun4m models (Javastations) may not map the zs device. 282 */ 283 if (sa->sa_npromvaddrs > 0) 284 va = (void *)sa->sa_promvaddr; 285 else { 286 bus_space_handle_t bh; 287 288 if (sbus_bus_map(sa->sa_bustag, 289 sa->sa_slot, 290 sa->sa_offset, 291 sa->sa_size, 292 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 293 printf(" cannot map zs registers\n"); 294 return; 295 } 296 va = (void *)bh; 297 } 298 299 /* 300 * Check if power state can be set, e.g. Tadpole 3GX 301 */ 302 if (prom_getpropint(sa->sa_node, "pwr-on-auxio2", 0)) 303 { 304 printf (" powered via auxio2"); 305 for (channel = 0; channel < 2; channel++) { 306 cs = &zsc->zsc_cs_store[channel]; 307 cs->enable = zs_enable; 308 cs->disable = zs_disable; 309 } 310 } 311 312 zsc->zsc_bustag = sa->sa_bustag; 313 zsc->zsc_dmatag = sa->sa_dmatag; 314 zsc->zsc_promunit = prom_getpropint(sa->sa_node, "slave", -2); 315 zsc->zsc_node = sa->sa_node; 316 zs_attach(zsc, va, sa->sa_pri); 317 } else { 318 struct obio4_attach_args *oba = &uoba->uoba_oba4; 319 bus_space_handle_t bh; 320 bus_addr_t paddr = oba->oba_paddr; 321 322 /* 323 * As for zs on mainbus, we require a PROM mapping. 324 */ 325 if (bus_space_map(oba->oba_bustag, 326 paddr, 327 sizeof(struct zsdevice), 328 BUS_SPACE_MAP_LINEAR | OBIO_BUS_MAP_USE_ROM, 329 &bh) != 0) { 330 printf(" cannot map zs registers\n"); 331 return; 332 } 333 zsc->zsc_bustag = oba->oba_bustag; 334 zsc->zsc_dmatag = oba->oba_dmatag; 335 /* 336 * Find prom unit by physical address 337 * We're just comparing the address (not the iospace) here 338 */ 339 paddr = BUS_ADDR_PADDR(paddr); 340 if (cpuinfo.cpu_type == CPUTYP_4_100) 341 /* 342 * On the sun4/100, the top-most 4 bits are zero 343 * on obio addresses; force them to 1's for the 344 * sake of the comparison here. 345 */ 346 paddr |= 0xf0000000; 347 zsc->zsc_promunit = 348 (paddr == 0xf1000000) ? 0 : 349 (paddr == 0xf0000000) ? 1 : 350 (paddr == 0xe0000000) ? 2 : -2; 351 352 zs_attach(zsc, (void *)bh, oba->oba_pri); 353 } 354 } 355 356 #if defined(SUN4D) 357 static void 358 zs_attach_bootbus(struct device *parent, struct device *self, void *aux) 359 { 360 struct zsc_softc *zsc = (void *) self; 361 struct bootbus_attach_args *baa = aux; 362 void *va; 363 364 if (baa->ba_nintr == 0) { 365 printf(": no interrupt lines\n"); 366 return; 367 } 368 369 if (baa->ba_npromvaddrs > 0) 370 va = (void *) baa->ba_promvaddrs; 371 else { 372 bus_space_handle_t bh; 373 374 if (bus_space_map(baa->ba_bustag, 375 BUS_ADDR(baa->ba_slot, baa->ba_offset), 376 baa->ba_size, BUS_SPACE_MAP_LINEAR, &bh) != 0) { 377 printf(": cannot map zs registers\n"); 378 return; 379 } 380 va = (void *) bh; 381 } 382 383 zsc->zsc_bustag = baa->ba_bustag; 384 zsc->zsc_promunit = prom_getpropint(baa->ba_node, "slave", -2); 385 zsc->zsc_node = baa->ba_node; 386 zs_attach(zsc, va, baa->ba_intr[0].oi_pri); 387 } 388 #endif /* SUN4D */ 389 390 /* 391 * Attach a found zs. 392 * 393 * USE ROM PROPERTIES port-a-ignore-cd AND port-b-ignore-cd FOR 394 * SOFT CARRIER, AND keyboard PROPERTY FOR KEYBOARD/MOUSE? 395 */ 396 static void 397 zs_attach(struct zsc_softc *zsc, struct zsdevice *zsd, int pri) 398 { 399 struct zsc_attach_args zsc_args; 400 struct zs_chanstate *cs; 401 int s, channel; 402 static int didintr, prevpri; 403 int ch0_is_cons = 0; 404 405 if (zsd == NULL) { 406 printf("configuration incomplete\n"); 407 return; 408 } 409 410 if (!didintr) { 411 zs_sicookie = softint_establish(SOFTINT_SERIAL, zssoft, NULL); 412 if (zs_sicookie == NULL) { 413 printf("\n%s: cannot establish soft int handler\n", 414 zsc->zsc_dev.dv_xname); 415 return; 416 } 417 } 418 printf(" softpri %d\n", IPL_SOFTSERIAL); 419 420 /* 421 * Initialize software state for each channel. 422 */ 423 for (channel = 0; channel < 2; channel++) { 424 struct zschan *zc; 425 struct device *child; 426 int hwflags; 427 428 zsc_args.channel = channel; 429 cs = &zsc->zsc_cs_store[channel]; 430 zsc->zsc_cs[channel] = cs; 431 432 zs_lock_init(cs); 433 cs->cs_channel = channel; 434 cs->cs_private = NULL; 435 cs->cs_ops = &zsops_null; 436 cs->cs_brg_clk = PCLK / 16; 437 438 zc = (channel == 0) ? &zsd->zs_chan_a : &zsd->zs_chan_b; 439 440 hwflags = zs_console_flags(zsc->zsc_promunit, 441 zsc->zsc_node, 442 channel); 443 444 #if NWSKBD == 0 445 /* Not using wscons console, so always set console flags.*/ 446 zsc_args.hwflags = hwflags; 447 if (zsc_args.hwflags & ZS_HWFLAG_CONSOLE) { 448 zsc_args.hwflags |= ZS_HWFLAG_USE_CONSDEV; 449 zsc_args.consdev = &zs_consdev; 450 } 451 #else 452 /* If we are unit 1, then this is the "real" console. 453 * Remember this in order to set up the keyboard and 454 * mouse line disciplines for SUN4 machines below. 455 * Also, don't set the console flags, otherwise we 456 * tell zstty_attach() to attach as console. 457 */ 458 if (zsc->zsc_promunit == 1) { 459 if ((hwflags & ZS_HWFLAG_CONSOLE_INPUT) != 0 && 460 !channel) { 461 ch0_is_cons = 1; 462 } 463 } else { 464 zsc_args.hwflags = hwflags; 465 } 466 #endif 467 if ((zsc_args.hwflags & ZS_HWFLAG_CONSOLE_INPUT) != 0) { 468 zs_conschan_get = zc; 469 } 470 if ((zsc_args.hwflags & ZS_HWFLAG_CONSOLE_OUTPUT) != 0) { 471 zs_conschan_put = zc; 472 } 473 /* Childs need to set cn_dev, etc */ 474 475 cs->cs_reg_csr = &zc->zc_csr; 476 cs->cs_reg_data = &zc->zc_data; 477 478 bcopy(zs_init_reg, cs->cs_creg, 16); 479 bcopy(zs_init_reg, cs->cs_preg, 16); 480 481 /* XXX: Consult PROM properties for this?! */ 482 cs->cs_defspeed = zs_get_speed(cs); 483 cs->cs_defcflag = zs_def_cflag; 484 485 /* Make these correspond to cs_defcflag (-crtscts) */ 486 cs->cs_rr0_dcd = ZSRR0_DCD; 487 cs->cs_rr0_cts = 0; 488 cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS; 489 cs->cs_wr5_rts = 0; 490 491 /* 492 * Clear the master interrupt enable. 493 * The INTENA is common to both channels, 494 * so just do it on the A channel. 495 */ 496 if (channel == 0) { 497 zs_write_reg(cs, 9, 0); 498 } 499 500 /* 501 * Look for a child driver for this channel. 502 * The child attach will setup the hardware. 503 */ 504 505 child = config_found(&zsc->zsc_dev, &zsc_args, zs_print); 506 if (child == NULL) { 507 /* No sub-driver. Just reset it. */ 508 u_char reset = (channel == 0) ? 509 ZSWR9_A_RESET : ZSWR9_B_RESET; 510 s = splzs(); 511 zs_write_reg(cs, 9, reset); 512 splx(s); 513 } 514 #if (NKBD > 0) || (NMS > 0) 515 /* 516 * If this was a zstty it has a keyboard 517 * property on it we need to attach the 518 * sunkbd and sunms line disciplines. 519 * There are no properties on SUN4 machines. 520 * For them, check if we have set the 521 * ch0_is_cons variable above. 522 */ 523 if ((child != NULL) && 524 (device_is_a(child, "zstty")) && ( 525 (CPU_ISSUN4 && ch0_is_cons) || (!CPU_ISSUN4 && 526 (prom_getproplen(zsc->zsc_node, "keyboard") == 0)))) 527 { 528 struct kbd_ms_tty_attach_args kma; 529 struct tty *tp = zstty_get_tty_from_dev(child); 530 kma.kmta_tp = tp; 531 kma.kmta_dev = tp->t_dev; 532 kma.kmta_consdev = zsc_args.consdev; 533 534 /* Attach 'em if we got 'em. */ 535 #if (NKBD > 0) 536 if (channel == 0) { 537 kma.kmta_name = "keyboard"; 538 config_found(child, &kma, NULL); 539 } 540 #endif 541 #if (NMS > 0) 542 if (channel == 1) { 543 kma.kmta_name = "mouse"; 544 config_found(child, &kma, NULL); 545 } 546 #endif 547 } 548 #endif 549 } 550 551 /* 552 * Now safe to install interrupt handlers. Note the arguments 553 * to the interrupt handlers aren't used. Note, we only do this 554 * once since both SCCs interrupt at the same level and vector. 555 */ 556 if (!didintr) { 557 didintr = 1; 558 prevpri = pri; 559 bus_intr_establish(zsc->zsc_bustag, pri, IPL_SERIAL, 560 zshard, NULL); 561 } else if (pri != prevpri) 562 panic("broken zs interrupt scheme"); 563 564 evcnt_attach_dynamic(&zsc->zsc_intrcnt, EVCNT_TYPE_INTR, NULL, 565 zsc->zsc_dev.dv_xname, "intr"); 566 567 /* 568 * Set the master interrupt enable and interrupt vector. 569 * (common to both channels, do it on A) 570 */ 571 cs = zsc->zsc_cs[0]; 572 s = splhigh(); 573 /* interrupt vector */ 574 zs_write_reg(cs, 2, zs_init_reg[2]); 575 /* master interrupt control (enable) */ 576 zs_write_reg(cs, 9, zs_init_reg[9]); 577 splx(s); 578 579 #if 0 580 /* 581 * XXX: L1A hack - We would like to be able to break into 582 * the debugger during the rest of autoconfiguration, so 583 * lower interrupts just enough to let zs interrupts in. 584 * This is done after both zs devices are attached. 585 */ 586 if (zsc->zsc_promunit == 1) { 587 printf("zs1: enabling zs interrupts\n"); 588 (void)splfd(); /* XXX: splzs - 1 */ 589 } 590 #endif 591 592 } 593 594 static int 595 zs_print(void *aux, const char *name) 596 { 597 struct zsc_attach_args *args = aux; 598 599 if (name != NULL) 600 aprint_normal("%s: ", name); 601 602 if (args->channel != -1) 603 aprint_normal(" channel %d", args->channel); 604 605 return (UNCONF); 606 } 607 608 static volatile int zssoftpending; 609 610 /* 611 * Our ZS chips all share a common, autovectored interrupt, 612 * so we have to look at all of them on each interrupt. 613 */ 614 static int 615 zshard(void *arg) 616 { 617 struct zsc_softc *zsc; 618 int unit, rr3, rval, softreq; 619 620 rval = softreq = 0; 621 for (unit = 0; unit < zs_cd.cd_ndevs; unit++) { 622 struct zs_chanstate *cs; 623 624 zsc = zs_cd.cd_devs[unit]; 625 if (zsc == NULL) 626 continue; 627 rr3 = zsc_intr_hard(zsc); 628 /* Count up the interrupts. */ 629 if (rr3) { 630 rval |= rr3; 631 zsc->zsc_intrcnt.ev_count++; 632 } 633 if ((cs = zsc->zsc_cs[0]) != NULL) 634 softreq |= cs->cs_softreq; 635 if ((cs = zsc->zsc_cs[1]) != NULL) 636 softreq |= cs->cs_softreq; 637 } 638 639 /* We are at splzs here, so no need to lock. */ 640 if (softreq && (zssoftpending == 0)) { 641 zssoftpending = 1; 642 softint_schedule(zs_sicookie); 643 } 644 return (rval); 645 } 646 647 /* 648 * Similar scheme as for zshard (look at all of them) 649 */ 650 static void 651 zssoft(void *arg) 652 { 653 struct zsc_softc *zsc; 654 int s, unit; 655 656 /* This is not the only ISR on this IPL. */ 657 if (zssoftpending == 0) 658 return; 659 660 /* 661 * The soft intr. bit will be set by zshard only if 662 * the variable zssoftpending is zero. The order of 663 * these next two statements prevents our clearing 664 * the soft intr bit just after zshard has set it. 665 */ 666 /* ienab_bic(IE_ZSSOFT); */ 667 zssoftpending = 0; 668 669 /* Make sure we call the tty layer at spltty. */ 670 s = spltty(); 671 for (unit = 0; unit < zs_cd.cd_ndevs; unit++) { 672 zsc = zs_cd.cd_devs[unit]; 673 if (zsc == NULL) 674 continue; 675 (void)zsc_intr_soft(zsc); 676 } 677 splx(s); 678 } 679 680 681 /* 682 * Compute the current baud rate given a ZS channel. 683 */ 684 static int 685 zs_get_speed(struct zs_chanstate *cs) 686 { 687 int tconst; 688 689 tconst = zs_read_reg(cs, 12); 690 tconst |= zs_read_reg(cs, 13) << 8; 691 return (TCONST_TO_BPS(cs->cs_brg_clk, tconst)); 692 } 693 694 /* 695 * MD functions for setting the baud rate and control modes. 696 * bps - in bits per second 697 */ 698 int 699 zs_set_speed(struct zs_chanstate *cs, int bps) 700 { 701 int tconst, real_bps; 702 703 if (bps == 0) 704 return (0); 705 706 #ifdef DIAGNOSTIC 707 if (cs->cs_brg_clk == 0) 708 panic("zs_set_speed"); 709 #endif 710 711 tconst = BPS_TO_TCONST(cs->cs_brg_clk, bps); 712 if (tconst < 0) 713 return (EINVAL); 714 715 /* Convert back to make sure we can do it. */ 716 real_bps = TCONST_TO_BPS(cs->cs_brg_clk, tconst); 717 718 /* XXX - Allow some tolerance here? */ 719 if (real_bps != bps) 720 return (EINVAL); 721 722 cs->cs_preg[12] = tconst; 723 cs->cs_preg[13] = tconst >> 8; 724 725 /* Caller will stuff the pending registers. */ 726 return (0); 727 } 728 729 int 730 zs_set_modes(struct zs_chanstate *cs, int cflag) 731 { 732 int s; 733 734 /* 735 * Output hardware flow control on the chip is horrendous: 736 * if carrier detect drops, the receiver is disabled, and if 737 * CTS drops, the transmitter is stoped IN MID CHARACTER! 738 * Therefore, NEVER set the HFC bit, and instead use the 739 * status interrupt to detect CTS changes. 740 */ 741 s = splzs(); 742 cs->cs_rr0_pps = 0; 743 if ((cflag & (CLOCAL | MDMBUF)) != 0) { 744 cs->cs_rr0_dcd = 0; 745 if ((cflag & MDMBUF) == 0) 746 cs->cs_rr0_pps = ZSRR0_DCD; 747 } else 748 cs->cs_rr0_dcd = ZSRR0_DCD; 749 if ((cflag & CRTSCTS) != 0) { 750 cs->cs_wr5_dtr = ZSWR5_DTR; 751 cs->cs_wr5_rts = ZSWR5_RTS; 752 cs->cs_rr0_cts = ZSRR0_CTS; 753 } else if ((cflag & CDTRCTS) != 0) { 754 cs->cs_wr5_dtr = 0; 755 cs->cs_wr5_rts = ZSWR5_DTR; 756 cs->cs_rr0_cts = ZSRR0_CTS; 757 } else if ((cflag & MDMBUF) != 0) { 758 cs->cs_wr5_dtr = 0; 759 cs->cs_wr5_rts = ZSWR5_DTR; 760 cs->cs_rr0_cts = ZSRR0_DCD; 761 } else { 762 cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS; 763 cs->cs_wr5_rts = 0; 764 cs->cs_rr0_cts = 0; 765 } 766 splx(s); 767 768 /* Caller will stuff the pending registers. */ 769 return (0); 770 } 771 772 773 /* 774 * Read or write the chip with suitable delays. 775 */ 776 777 u_char 778 zs_read_reg(struct zs_chanstate *cs, u_char reg) 779 { 780 u_char val; 781 782 *cs->cs_reg_csr = reg; 783 ZS_DELAY(); 784 val = *cs->cs_reg_csr; 785 ZS_DELAY(); 786 return (val); 787 } 788 789 void 790 zs_write_reg(struct zs_chanstate *cs, u_char reg, u_char val) 791 { 792 793 *cs->cs_reg_csr = reg; 794 ZS_DELAY(); 795 *cs->cs_reg_csr = val; 796 ZS_DELAY(); 797 } 798 799 u_char 800 zs_read_csr(struct zs_chanstate *cs) 801 { 802 u_char val; 803 804 val = *cs->cs_reg_csr; 805 ZS_DELAY(); 806 return (val); 807 } 808 809 void 810 zs_write_csr(struct zs_chanstate *cs, u_char val) 811 { 812 813 *cs->cs_reg_csr = val; 814 ZS_DELAY(); 815 } 816 817 u_char 818 zs_read_data(struct zs_chanstate *cs) 819 { 820 u_char val; 821 822 val = *cs->cs_reg_data; 823 ZS_DELAY(); 824 return (val); 825 } 826 827 void 828 zs_write_data(struct zs_chanstate *cs, u_char val) 829 { 830 831 *cs->cs_reg_data = val; 832 ZS_DELAY(); 833 } 834 835 /**************************************************************** 836 * Console support functions (Sun specific!) 837 * Note: this code is allowed to know about the layout of 838 * the chip registers, and uses that to keep things simple. 839 * XXX - I think I like the mvme167 code better. -gwr 840 ****************************************************************/ 841 842 /* 843 * Handle user request to enter kernel debugger. 844 */ 845 void 846 zs_abort(struct zs_chanstate *cs) 847 { 848 struct zschan *zc = zs_conschan_get; 849 int rr0; 850 851 /* Wait for end of break to avoid PROM abort. */ 852 /* XXX - Limit the wait? */ 853 do { 854 rr0 = zc->zc_csr; 855 ZS_DELAY(); 856 } while (rr0 & ZSRR0_BREAK); 857 858 #if defined(KGDB) 859 zskgdb(cs); 860 #elif defined(DDB) 861 Debugger(); 862 #else 863 printf("stopping on keyboard abort\n"); 864 callrom(); 865 #endif 866 } 867 868 int zs_getc(void *); 869 void zs_putc(void *, int); 870 871 /* 872 * Polled input char. 873 */ 874 int 875 zs_getc(void *arg) 876 { 877 struct zschan *zc = arg; 878 int s, c, rr0; 879 u_int omid; 880 881 /* Temporarily direct interrupts at ourselves */ 882 s = splhigh(); 883 omid = setitr(cpuinfo.mid); 884 885 /* Wait for a character to arrive. */ 886 do { 887 rr0 = zc->zc_csr; 888 ZS_DELAY(); 889 } while ((rr0 & ZSRR0_RX_READY) == 0); 890 891 c = zc->zc_data; 892 ZS_DELAY(); 893 setitr(omid); 894 splx(s); 895 896 /* 897 * This is used by the kd driver to read scan codes, 898 * so don't translate '\r' ==> '\n' here... 899 */ 900 return (c); 901 } 902 903 /* 904 * Polled output char. 905 */ 906 void 907 zs_putc(void *arg, int c) 908 { 909 struct zschan *zc = arg; 910 int s, rr0; 911 u_int omid; 912 913 /* Temporarily direct interrupts at ourselves */ 914 s = splhigh(); 915 omid = setitr(cpuinfo.mid); 916 917 /* Wait for transmitter to become ready. */ 918 do { 919 rr0 = zc->zc_csr; 920 ZS_DELAY(); 921 } while ((rr0 & ZSRR0_TX_READY) == 0); 922 923 /* 924 * Send the next character. 925 * Now you'd think that this could be followed by a ZS_DELAY() 926 * just like all the other chip accesses, but it turns out that 927 * the `transmit-ready' interrupt isn't de-asserted until 928 * some period of time after the register write completes 929 * (more than a couple instructions). So to avoid stray 930 * interrupts we put in the 2us delay regardless of CPU model. 931 */ 932 zc->zc_data = c; 933 delay(2); 934 935 setitr(omid); 936 splx(s); 937 } 938 939 /*****************************************************************/ 940 /* 941 * Polled console input putchar. 942 */ 943 static int 944 zscngetc(dev_t dev) 945 { 946 947 return (zs_getc(zs_conschan_get)); 948 } 949 950 /* 951 * Polled console output putchar. 952 */ 953 static void 954 zscnputc(dev_t dev, int c) 955 { 956 957 zs_putc(zs_conschan_put, c); 958 } 959 960 static void 961 zscnpollc(dev_t dev, int on) 962 { 963 964 /* No action needed */ 965 } 966 967 static int 968 zs_console_flags(int promunit, int node, int channel) 969 { 970 int cookie, flags = 0; 971 972 switch (prom_version()) { 973 case PROM_OLDMON: 974 case PROM_OBP_V0: 975 /* 976 * Use `promunit' and `channel' to derive the PROM 977 * stdio handles that correspond to this device. 978 */ 979 if (promunit == 0) 980 cookie = PROMDEV_TTYA + channel; 981 else if (promunit == 1 && channel == 0) 982 cookie = PROMDEV_KBD; 983 else 984 cookie = -1; 985 986 if (cookie == prom_stdin()) 987 flags |= ZS_HWFLAG_CONSOLE_INPUT; 988 989 /* 990 * Prevent the keyboard from matching the output device 991 * (note that PROMDEV_KBD == PROMDEV_SCREEN == 0!). 992 */ 993 if (cookie != PROMDEV_KBD && cookie == prom_stdout()) 994 flags |= ZS_HWFLAG_CONSOLE_OUTPUT; 995 996 break; 997 998 case PROM_OBP_V2: 999 case PROM_OBP_V3: 1000 case PROM_OPENFIRM: 1001 1002 /* 1003 * Match the nodes and device arguments prepared by 1004 * consinit() against our device node and channel. 1005 * (The device argument is the part of the OBP path 1006 * following the colon, as in `/obio/zs@0,100000:a') 1007 */ 1008 1009 /* Default to channel 0 if there are no explicit prom args */ 1010 cookie = 0; 1011 1012 if (node == prom_stdin_node) { 1013 if (prom_stdin_args[0] != '\0') 1014 /* Translate (a,b) -> (0,1) */ 1015 cookie = prom_stdin_args[0] - 'a'; 1016 1017 if (channel == cookie) 1018 flags |= ZS_HWFLAG_CONSOLE_INPUT; 1019 } 1020 1021 if (node == prom_stdout_node) { 1022 if (prom_stdout_args[0] != '\0') 1023 /* Translate (a,b) -> (0,1) */ 1024 cookie = prom_stdout_args[0] - 'a'; 1025 1026 if (channel == cookie) 1027 flags |= ZS_HWFLAG_CONSOLE_OUTPUT; 1028 } 1029 1030 break; 1031 1032 default: 1033 break; 1034 } 1035 1036 return (flags); 1037 } 1038 1039 /* 1040 * Power management hooks for zsopen() and zsclose(). 1041 * We use them to power on/off the ports, if necessary. 1042 */ 1043 int 1044 zs_enable(struct zs_chanstate *cs) 1045 { 1046 1047 auxiotwoserialendis (ZS_ENABLE); 1048 cs->enabled = 1; 1049 return(0); 1050 } 1051 1052 void 1053 zs_disable(struct zs_chanstate *cs) 1054 { 1055 1056 auxiotwoserialendis (ZS_DISABLE); 1057 cs->enabled = 0; 1058 } 1059