1 /* $NetBSD: frodo.c,v 1.36 2024/01/16 03:44:43 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1997 Michael Smith. All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 54 * SUCH DAMAGE. 55 */ 56 57 /* 58 * Support for the "Frodo" (a.k.a. "Apollo Utility") chip found 59 * in HP Apollo 9000/4xx workstations, as well as 9000/382 controllers. 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: frodo.c,v 1.36 2024/01/16 03:44:43 thorpej Exp $"); 64 65 #define _M68K_INTR_PRIVATE 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/kernel.h> 70 #include <sys/syslog.h> 71 #include <sys/device.h> 72 73 #include <machine/bus.h> 74 #include <machine/cpu.h> 75 #include <machine/intr.h> 76 #include <machine/hp300spu.h> 77 78 #include <hp300/dev/intiovar.h> 79 80 #include <hp300/dev/frodoreg.h> 81 #include <hp300/dev/frodovar.h> 82 83 /* 84 * Description of a Frodo interrupt handler. 85 */ 86 struct frodo_interhand { 87 int (*ih_fn)(void *); 88 void *ih_arg; 89 int ih_isrpri; 90 }; 91 92 struct frodo_softc { 93 device_t sc_dev; /* generic device glue */ 94 volatile uint8_t *sc_regs; /* register base */ 95 struct frodo_interhand sc_intr[FRODO_NINTR]; /* interrupt handlers */ 96 int sc_ipl; 97 void *sc_ih; /* out interrupt cookie */ 98 int sc_refcnt; /* number of interrupt refs */ 99 struct bus_space_tag sc_tag; /* bus space tag */ 100 }; 101 102 static int frodomatch(device_t, cfdata_t, void *); 103 static void frodoattach(device_t, device_t, void *); 104 105 static int frodoprint(void *, const char *); 106 static int frodosubmatch(device_t, cfdata_t, const int *, void *); 107 108 static int frodointr(void *); 109 110 static void frodo_imask(struct frodo_softc *, uint16_t, uint16_t); 111 112 CFATTACH_DECL_NEW(frodo, sizeof(struct frodo_softc), 113 frodomatch, frodoattach, NULL, NULL); 114 115 static const struct frodo_device frodo_subdevs[] = { 116 { "dnkbd", FRODO_APCI_OFFSET(0), FRODO_INTR_APCI0 }, 117 { "com", FRODO_APCI_OFFSET(1), FRODO_INTR_APCI1 }, 118 { "com", FRODO_APCI_OFFSET(2), FRODO_INTR_APCI2 }, 119 { "com", FRODO_APCI_OFFSET(3), FRODO_INTR_APCI3 }, 120 { "mcclock", FRODO_CALENDAR, FRODO_INTR_CALENDAR }, 121 { NULL, 0, 0 } 122 }; 123 124 static int 125 frodomatch(device_t parent, cfdata_t cf, void *aux) 126 { 127 struct intio_attach_args *ia = aux; 128 static int frodo_matched = 0; 129 130 /* only allow one instance */ 131 if (frodo_matched) 132 return 0; 133 134 if (strcmp(ia->ia_modname, "frodo") != 0) 135 return 0; 136 137 if (badaddr((void *)ia->ia_addr)) 138 return 0; 139 140 frodo_matched = 1; 141 return 1; 142 } 143 144 static void 145 frodoattach(device_t parent, device_t self, void *aux) 146 { 147 struct frodo_softc *sc = device_private(self); 148 struct intio_attach_args *ia = aux; 149 bus_space_tag_t bst = &sc->sc_tag; 150 const struct frodo_device *fd; 151 struct frodo_attach_args fa; 152 153 sc->sc_dev = self; 154 sc->sc_regs = (volatile uint8_t *)ia->ia_addr; 155 sc->sc_ipl = ia->ia_ipl; 156 157 if ((FRODO_READ(sc, FRODO_IISR) & FRODO_IISR_SERVICE) == 0) 158 aprint_normal(": service mode enabled"); 159 aprint_normal("\n"); 160 161 /* Initialize bus_space_tag_t for frodo */ 162 frodo_init_bus_space(bst); 163 164 /* Clear all of the interrupt handlers. */ 165 memset(sc->sc_intr, 0, sizeof(sc->sc_intr)); 166 sc->sc_refcnt = 0; 167 168 /* 169 * Disable all of the interrupt lines; we reenable them 170 * as subdevices attach. 171 */ 172 frodo_imask(sc, 0, 0xffff); 173 174 /* Clear any pending interrupts. */ 175 FRODO_WRITE(sc, FRODO_PIC_PU, 0xff); 176 FRODO_WRITE(sc, FRODO_PIC_PL, 0xff); 177 178 /* Set interrupt polarities. */ 179 FRODO_WRITE(sc, FRODO_PIO_IPR, 0x10); 180 181 /* ...and configure for edge triggering. */ 182 FRODO_WRITE(sc, FRODO_PIO_IELR, 0xcf); 183 184 /* 185 * We defer hooking up our interrupt handler until 186 * a subdevice hooks up theirs. 187 */ 188 sc->sc_ih = NULL; 189 190 /* ... and attach subdevices. */ 191 for (fd = frodo_subdevs; fd->fd_name != NULL; fd++) { 192 /* 193 * Skip the first serial port if we're not a 425e; 194 * it's mapped to the DCA at select code 9 on all 195 * other models. 196 */ 197 if (fd->fd_offset == FRODO_APCI_OFFSET(1) && 198 mmuid != MMUID_425_E) 199 continue; 200 /* 201 * The mcclock is available only on a 425e. 202 */ 203 if (fd->fd_offset == FRODO_CALENDAR && mmuid != MMUID_425_E) 204 continue; 205 fa.fa_name = fd->fd_name; 206 fa.fa_bst = bst; 207 fa.fa_base = ia->ia_iobase; 208 fa.fa_offset = fd->fd_offset; 209 fa.fa_line = fd->fd_line; 210 config_found(self, &fa, frodoprint, 211 CFARGS(.submatch = frodosubmatch)); 212 } 213 } 214 215 static int 216 frodosubmatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 217 { 218 struct frodo_attach_args *fa = aux; 219 220 if (cf->frodocf_offset != FRODO_UNKNOWN_OFFSET && 221 cf->frodocf_offset != fa->fa_offset) 222 return 0; 223 224 return config_match(parent, cf, aux); 225 } 226 227 static int 228 frodoprint(void *aux, const char *pnp) 229 { 230 struct frodo_attach_args *fa = aux; 231 232 if (pnp) 233 aprint_normal("%s at %s", fa->fa_name, pnp); 234 aprint_normal(" offset 0x%x", fa->fa_offset); 235 return UNCONF; 236 } 237 238 void 239 frodo_intr_establish(device_t frdev, int (*func)(void *), void *arg, 240 int line, int isrpri) 241 { 242 struct frodo_softc *sc = device_private(frdev); 243 struct m68k_intrhand *ih = sc->sc_ih; 244 245 if (line < 0 || line >= FRODO_NINTR) { 246 aprint_error_dev(frdev, "bad interrupt line %d\n", line); 247 goto lose; 248 } 249 if (sc->sc_intr[line].ih_fn != NULL) { 250 aprint_error_dev(frdev, "interrupt line %d already used\n", 251 line); 252 goto lose; 253 } 254 255 /* Install the handler. */ 256 sc->sc_intr[line].ih_fn = func; 257 sc->sc_intr[line].ih_arg = arg; 258 sc->sc_intr[line].ih_isrpri = isrpri; 259 260 /* 261 * If this is the first one, establish the frodo 262 * interrupt handler. If not, reestablish at a 263 * higher priority if necessary. 264 */ 265 if (ih == NULL || ih->ih_isrpri < isrpri) { 266 if (ih != NULL) 267 intr_disestablish(ih); 268 sc->sc_ih = intr_establish(frodointr, sc, sc->sc_ipl, isrpri); 269 } 270 271 sc->sc_refcnt++; 272 273 /* Enable the interrupt line. */ 274 frodo_imask(sc, (1 << line), 0); 275 return; 276 lose: 277 panic("frodo_intr_establish"); 278 } 279 280 void 281 frodo_intr_disestablish(device_t frdev, int line) 282 { 283 struct frodo_softc *sc = device_private(frdev); 284 struct m68k_intrhand *ih = sc->sc_ih; 285 int newpri; 286 287 if (sc->sc_intr[line].ih_fn == NULL) { 288 printf("%s: no handler for line %d\n", 289 device_xname(sc->sc_dev), line); 290 panic("frodo_intr_disestablish"); 291 } 292 293 sc->sc_intr[line].ih_fn = NULL; 294 frodo_imask(sc, 0, (1 << line)); 295 296 /* If this was the last, unhook ourselves. */ 297 if (sc->sc_refcnt-- == 1) { 298 intr_disestablish(ih); 299 return; 300 } 301 302 /* Lower our priority, if appropriate. */ 303 for (newpri = 0, line = 0; line < FRODO_NINTR; line++) 304 if (sc->sc_intr[line].ih_fn != NULL && 305 sc->sc_intr[line].ih_isrpri > newpri) 306 newpri = sc->sc_intr[line].ih_isrpri; 307 308 if (newpri != ih->ih_isrpri) { 309 intr_disestablish(ih); 310 sc->sc_ih = intr_establish(frodointr, sc, sc->sc_ipl, newpri); 311 } 312 } 313 314 static int 315 frodointr(void *arg) 316 { 317 struct frodo_softc *sc = arg; 318 struct frodo_interhand *fih; 319 int line, taken = 0; 320 321 /* Any interrupts pending? */ 322 if (FRODO_GETPEND(sc) == 0) 323 return 0; 324 325 do { 326 /* 327 * Get pending interrupt; this also clears it for us. 328 */ 329 line = FRODO_IPEND(sc); 330 fih = &sc->sc_intr[line]; 331 if (fih->ih_fn == NULL || 332 (*fih->ih_fn)(fih->ih_arg) == 0) 333 printf("%s: spurious interrupt on line %d\n", 334 device_xname(sc->sc_dev), line); 335 if (taken++ > 100) 336 panic("frodointr: looping!"); 337 } while (FRODO_GETPEND(sc) != 0); 338 339 return 1; 340 } 341 342 static void 343 frodo_imask(struct frodo_softc *sc, uint16_t set, uint16_t clear) 344 { 345 uint16_t imask; 346 347 imask = FRODO_GETMASK(sc); 348 349 imask |= set; 350 imask &= ~clear; 351 352 FRODO_SETMASK(sc, imask); 353 } 354 355 /* 356 * frodo chip specific bus_space(9) support functions. 357 */ 358 static uint8_t frodo_bus_space_read_sparse_1(bus_space_tag_t, 359 bus_space_handle_t, bus_size_t); 360 static void frodo_bus_space_write_sparse_1(bus_space_tag_t, 361 bus_space_handle_t, bus_size_t, uint8_t); 362 363 static void frodo_bus_space_read_multi_sparse_1(bus_space_tag_t, 364 bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t); 365 static void frodo_bus_space_write_multi_sparse_1(bus_space_tag_t, 366 bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t); 367 368 static void frodo_bus_space_read_region_sparse_1(bus_space_tag_t, 369 bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t); 370 static void frodo_bus_space_write_region_sparse_1(bus_space_tag_t, 371 bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t); 372 373 static void frodo_bus_space_set_multi_sparse_1(bus_space_tag_t, 374 bus_space_handle_t, bus_size_t, uint8_t, bus_size_t); 375 376 static void frodo_bus_space_set_region_sparse_1(bus_space_tag_t, 377 bus_space_handle_t, bus_size_t, uint8_t, bus_size_t); 378 379 /* 380 * frodo_init_bus_space(): 381 * Initialize bus_space functions in bus_space_tag_t 382 * for frodo devices which have sparse address space. 383 */ 384 void 385 frodo_init_bus_space(bus_space_tag_t bst) 386 { 387 388 memset(bst, 0, sizeof(struct bus_space_tag)); 389 bst->bustype = HP300_BUS_SPACE_INTIO; 390 391 bst->bsr1 = frodo_bus_space_read_sparse_1; 392 bst->bsw1 = frodo_bus_space_write_sparse_1; 393 394 bst->bsrm1 = frodo_bus_space_read_multi_sparse_1; 395 bst->bswm1 = frodo_bus_space_write_multi_sparse_1; 396 397 bst->bsrr1 = frodo_bus_space_read_region_sparse_1; 398 bst->bswr1 = frodo_bus_space_write_region_sparse_1; 399 400 bst->bssm1 = frodo_bus_space_set_multi_sparse_1; 401 402 bst->bssr1 = frodo_bus_space_set_region_sparse_1; 403 } 404 405 static uint8_t 406 frodo_bus_space_read_sparse_1(bus_space_tag_t bst, bus_space_handle_t bsh, 407 bus_size_t offset) 408 { 409 410 return *(volatile uint8_t *)(bsh + (offset << 2)); 411 } 412 413 static void 414 frodo_bus_space_write_sparse_1(bus_space_tag_t bst, bus_space_handle_t bsh, 415 bus_size_t offset, uint8_t val) 416 { 417 418 *(volatile uint8_t *)(bsh + (offset << 2)) = val; 419 } 420 421 static void 422 frodo_bus_space_read_multi_sparse_1(bus_space_tag_t bst, bus_space_handle_t bsh, 423 bus_size_t offset, uint8_t *addr, bus_size_t len) 424 { 425 426 __asm volatile ( 427 " movl %0,%%a0 ;\n" 428 " movl %1,%%a1 ;\n" 429 " movl %2,%%d0 ;\n" 430 "1: movb %%a0@,%%a1@+ ;\n" 431 " subql #1,%%d0 ;\n" 432 " jne 1b" 433 : 434 : "r" (bsh + (offset << 2)), "g" (addr), "g" (len) 435 : "%a0","%a1","%d0"); 436 } 437 438 static void 439 frodo_bus_space_write_multi_sparse_1(bus_space_tag_t bst, 440 bus_space_handle_t bsh, bus_size_t offset, const uint8_t *addr, 441 bus_size_t len) 442 { 443 444 __asm volatile ( 445 " movl %0,%%a0 ;\n" 446 " movl %1,%%a1 ;\n" 447 " movl %2,%%d0 ;\n" 448 "1: movb %%a1@+,%%a0@ ;\n" 449 " subql #1,%%d0 ;\n" 450 " jne 1b" 451 : 452 : "r" (bsh + (offset << 2)), "g" (addr), "g" (len) 453 : "%a0","%a1","%d0"); 454 } 455 456 static void 457 frodo_bus_space_read_region_sparse_1(bus_space_tag_t bst, 458 bus_space_handle_t bsh, bus_size_t offset, uint8_t *addr, bus_size_t len) 459 { 460 __asm volatile ( 461 " movl %0,%%a0 ;\n" 462 " movl %1,%%a1 ;\n" 463 " movl %2,%%d0 ;\n" 464 "1: movb %%a0@,%%a1@+ ;\n" 465 " addql #4,%%a0 ;\n" 466 " subql #1,%%d0 ;\n" 467 " jne 1b" 468 : 469 : "r" (bsh + (offset << 2)), "g" (addr), "g" (len) 470 : "%a0","%a1","%d0"); 471 } 472 473 static void 474 frodo_bus_space_write_region_sparse_1(bus_space_tag_t bst, 475 bus_space_handle_t bsh, bus_size_t offset, const uint8_t *addr, 476 bus_size_t len) 477 { 478 479 __asm volatile ( 480 " movl %0,%%a0 ;\n" 481 " movl %1,%%a1 ;\n" 482 " movl %2,%%d0 ;\n" 483 "1: movb %%a1@+,%%a0@ ;\n" 484 " addql #4,%%a0 ;\n" 485 " subql #1,%%d0 ;\n" 486 " jne 1b" 487 : 488 : "r" (bsh + (offset << 2)), "g" (addr), "g" (len) 489 : "%a0","%a1","%d0"); 490 } 491 492 static void 493 frodo_bus_space_set_multi_sparse_1(bus_space_tag_t bst, bus_space_handle_t bsh, 494 bus_size_t offset, uint8_t val, bus_size_t count) 495 { 496 __asm volatile ( 497 " movl %0,%%a0 ;\n" 498 " movl %1,%%d1 ;\n" 499 " movl %2,%%d0 ;\n" 500 "1: movb %%d1,%%a0@ ;\n" 501 " subql #1,%%d0 ;\n" 502 " jne 1b" 503 : 504 : "r" (bsh + (offset << 2)), "g" (val), "g" (count) 505 : "%a0","%d0","%d1"); 506 } 507 508 static void 509 frodo_bus_space_set_region_sparse_1(bus_space_tag_t bst, bus_space_handle_t bsh, 510 bus_size_t offset, uint8_t val, bus_size_t count) 511 { 512 513 __asm volatile ( 514 " movl %0,%%a0 ;\n" 515 " movl %1,%%d1 ;\n" 516 " movl %2,%%d0 ;\n" 517 "1: movb %%d1,%%a0@ ;\n" 518 " addql #4,%%a0 ;\n" 519 " subql #1,%%d0 ;\n" 520 " jne 1b" 521 : 522 : "r" (bsh + (offset << 2)), "g" (val), "g" (count) 523 : "%a0","%d0","%d1"); 524 } 525
Indexes created Sun Sep 21 15:09:59 GMT 2025