1 /* $NetBSD: dio.c,v 1.43 2024/01/16 07:06:59 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 1998 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 * Autoconfiguration and mapping support for the DIO bus. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: dio.c,v 1.43 2024/01/16 07:06:59 thorpej Exp $"); 38 39 #define _M68K_INTR_PRIVATE 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/device.h> 45 46 #include <machine/bus.h> 47 48 #include <uvm/uvm_extern.h> 49 50 #include <machine/autoconf.h> 51 #include <machine/cpu.h> 52 #include <machine/hp300spu.h> 53 54 #include <hp300/dev/dmavar.h> 55 56 #include <hp300/dev/dioreg.h> 57 #include <hp300/dev/diovar.h> 58 59 #include <hp300/dev/diodevs.h> 60 #include <hp300/dev/diodevs_data.h> 61 62 #include "locators.h" 63 #define diocf_scode cf_loc[DIOCF_SCODE] 64 65 struct dio_softc { 66 device_t sc_dev; 67 struct bus_space_tag sc_tag; 68 }; 69 70 static int dio_scodesize(struct dio_attach_args *); 71 static const char *dio_devinfo(struct dio_attach_args *, char *, size_t); 72 73 static int diomatch(device_t, cfdata_t, void *); 74 static void dioattach(device_t, device_t, void *); 75 static int dioprint(void *, const char *); 76 static int diosubmatch(device_t, cfdata_t, const int *, void *); 77 78 CFATTACH_DECL_NEW(dio, sizeof(struct dio_softc), 79 diomatch, dioattach, NULL, NULL); 80 81 static LIST_HEAD(, hp300_intrhand) dio_dma_users = 82 LIST_HEAD_INITIALIZER(dio_dma_users); 83 84 static int 85 diomatch(device_t parent, cfdata_t cf, void *aux) 86 { 87 static int dio_matched = 0; 88 89 /* Allow only one instance. */ 90 if (dio_matched) 91 return 0; 92 93 dio_matched = 1; 94 return 1; 95 } 96 97 static void 98 dioattach(device_t parent, device_t self, void *aux) 99 { 100 struct dio_softc *sc = device_private(self); 101 struct dio_attach_args da; 102 bus_addr_t pa; 103 void *va; 104 bus_space_tag_t bst = &sc->sc_tag; 105 bus_space_handle_t bsh; 106 int scode, scmax, scodesize; 107 108 sc->sc_dev = self; 109 aprint_normal("\n"); 110 111 memset(bst, 0, sizeof(struct bus_space_tag)); 112 bst->bustype = HP300_BUS_SPACE_DIO; 113 114 scmax = DIO_SCMAX(machineid); 115 116 for (scode = 0; scode < scmax; ) { 117 if (DIO_INHOLE(scode)) { 118 scode++; 119 continue; 120 } 121 122 /* 123 * Temporarily map the space corresponding to 124 * the current select code unless: 125 */ 126 pa = (bus_addr_t)dio_scodetopa(scode); 127 if (bus_space_map(bst, pa, PAGE_SIZE, 0, &bsh)) { 128 aprint_error_dev(self, "can't map scode %d\n", scode); 129 scode++; 130 continue; 131 } 132 va = bus_space_vaddr(bst, bsh); 133 134 /* Check for hardware. */ 135 if (badaddr(va)) { 136 bus_space_unmap(bst, bsh, PAGE_SIZE); 137 scode++; 138 continue; 139 } 140 141 /* Fill out attach args. */ 142 memset(&da, 0, sizeof(da)); 143 da.da_bst = bst; 144 da.da_scode = scode; 145 146 da.da_id = DIO_ID(va); 147 if (DIO_ISFRAMEBUFFER(da.da_id)) 148 da.da_secid = DIO_SECID(va); 149 da.da_addr = pa; 150 da.da_size = DIO_SIZE(scode, va); 151 scodesize = dio_scodesize(&da); 152 if (DIO_ISDIO(scode)) 153 da.da_size *= scodesize; 154 da.da_ipl = DIO_IPL(va); 155 156 /* No longer need the device to be mapped. */ 157 bus_space_unmap(bst, bsh, PAGE_SIZE); 158 159 /* Attach matching device. */ 160 config_found(self, &da, dioprint, 161 CFARGS(.submatch = diosubmatch)); 162 scode += scodesize; 163 } 164 } 165 166 static int 167 diosubmatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 168 { 169 struct dio_attach_args *da = aux; 170 171 if (cf->diocf_scode != DIOCF_SCODE_DEFAULT && 172 cf->diocf_scode != da->da_scode) 173 return 0; 174 175 return config_match(parent, cf, aux); 176 } 177 178 static int 179 dioprint(void *aux, const char *pnp) 180 { 181 struct dio_attach_args *da = aux; 182 char buf[128]; 183 184 if (pnp) 185 aprint_normal("%s at %s", 186 dio_devinfo(da, buf, sizeof(buf)), pnp); 187 aprint_normal(" scode %d ipl %d", da->da_scode, da->da_ipl); 188 return UNCONF; 189 } 190 191 /* 192 * Convert a select code to a system physical address. 193 */ 194 void * 195 dio_scodetopa(int scode) 196 { 197 u_long rval; 198 199 if (DIO_ISDIO(scode)) 200 rval = DIO_BASE + (scode * DIO_DEVSIZE); 201 else if (DIO_ISDIOII(scode)) 202 rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE); 203 else 204 rval = 0; 205 206 return (void *)rval; 207 } 208 209 /* 210 * Return the select code size for this device, defaulting to 1 211 * if we don't know what kind of device we have. 212 */ 213 static int 214 dio_scodesize(struct dio_attach_args *da) 215 { 216 int i; 217 218 /* 219 * Find the dio_devdata matchind the primary id. 220 * If we're a framebuffer, we also check the secondary id. 221 */ 222 for (i = 0; i < DIO_NDEVICES; i++) { 223 if (da->da_id == dio_devdatas[i].dd_id) { 224 if (DIO_ISFRAMEBUFFER(da->da_id)) { 225 if (da->da_secid == dio_devdatas[i].dd_secid) { 226 goto foundit; 227 } 228 } else { 229 foundit: 230 return dio_devdatas[i].dd_nscode; 231 } 232 } 233 } 234 235 /* 236 * Device is unknown. Print a warning and assume a default. 237 */ 238 aprint_error("WARNING: select code size unknown " 239 "for id = 0x%x secid = 0x%x\n", 240 da->da_id, da->da_secid); 241 return 1; 242 } 243 244 /* 245 * Return a reasonable description of a DIO device. 246 */ 247 static const char * 248 dio_devinfo(struct dio_attach_args *da, char *buf, size_t buflen) 249 { 250 #ifdef DIOVERBOSE 251 int i; 252 #endif 253 254 memset(buf, 0, buflen); 255 256 #ifdef DIOVERBOSE 257 /* 258 * Find the description matching our primary id. 259 * If we're a framebuffer, we also check the secondary id. 260 */ 261 for (i = 0; i < DIO_NDEVICES; i++) { 262 if (da->da_id == dio_devdescs[i].dd_id) { 263 if (DIO_ISFRAMEBUFFER(da->da_id)) { 264 if (da->da_secid == dio_devdescs[i].dd_secid) { 265 goto foundit; 266 } 267 } else { 268 foundit: 269 snprintf(buf, buflen, "%s", 270 dio_devdescs[i].dd_desc); 271 return buf; 272 } 273 } 274 } 275 #endif /* DIOVERBOSE */ 276 277 /* 278 * Device is unknown. Construct something reasonable. 279 */ 280 snprintf(buf, buflen, "device id = 0x%x secid = 0x%x", 281 da->da_id, da->da_secid); 282 return buf; 283 } 284 285 /* 286 * Enumerate the list of DMA controller users (the HPIB and SCSI 287 * controllers, essentially), and calculate what the highest 288 * auto-vector level used by those devices is. Then tell the DMA 289 * controller to interrupt at that level. 290 */ 291 static void 292 dio_dma_users_changed(void) 293 { 294 struct hp300_intrhand *ih; 295 int ipl = 0; 296 297 LIST_FOREACH(ih, &dio_dma_users, ih_dio_link) { 298 KASSERT(ih->ih_super.ih_isrpri == ISRPRI_BIO); 299 if (ih->ih_super.ih_ipl > ipl) { 300 ipl = ih->ih_super.ih_ipl; 301 } 302 } 303 dmaupdateipl(ipl); 304 } 305 306 /* 307 * Establish an interrupt handler for a DIO device. 308 */ 309 void * 310 dio_intr_establish(int (*func)(void *), void *arg, int ipl, int isrpri) 311 { 312 struct hp300_intrhand *ih; 313 314 ih = intr_establish(func, arg, ipl, isrpri); 315 316 if (ih != NULL && isrpri == ISRPRI_BIO) { 317 LIST_INSERT_HEAD(&dio_dma_users, ih, ih_dio_link); 318 dio_dma_users_changed(); 319 } 320 321 return ih; 322 } 323 324 /* 325 * Remove an interrupt handler for a DIO device. 326 */ 327 void 328 dio_intr_disestablish(void *arg) 329 { 330 struct hp300_intrhand *ih = arg; 331 int isrpri = ih->ih_super.ih_isrpri; 332 333 if (isrpri == ISRPRI_BIO) { 334 LIST_REMOVE(ih, ih_dio_link); 335 } 336 337 intr_disestablish(arg); 338 339 if (isrpri == ISRPRI_BIO) { 340 dio_dma_users_changed(); 341 } 342 } 343 344 /* 345 * DIO specific bus_space(9) support functions. 346 */ 347 static uint8_t dio_bus_space_read_oddbyte_1(bus_space_tag_t, 348 bus_space_handle_t, bus_size_t); 349 static void dio_bus_space_write_oddbyte_1(bus_space_tag_t, 350 bus_space_handle_t, bus_size_t, uint8_t); 351 352 static void dio_bus_space_read_multi_oddbyte_1(bus_space_tag_t, 353 bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t); 354 static void dio_bus_space_write_multi_oddbyte_1(bus_space_tag_t, 355 bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t); 356 357 static void dio_bus_space_read_region_oddbyte_1(bus_space_tag_t, 358 bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t); 359 static void dio_bus_space_write_region_oddbyte_1(bus_space_tag_t, 360 bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t); 361 362 static void dio_bus_space_set_multi_oddbyte_1(bus_space_tag_t, 363 bus_space_handle_t, bus_size_t, uint8_t, bus_size_t); 364 365 static void dio_bus_space_set_region_oddbyte_1(bus_space_tag_t, 366 bus_space_handle_t, bus_size_t, uint8_t, bus_size_t); 367 368 /* 369 * dio_set_bus_space_oddbyte(): 370 * Override bus_space functions in bus_space_tag_t 371 * for devices which have odd byte address space. 372 */ 373 void 374 dio_set_bus_space_oddbyte(bus_space_tag_t bst) 375 { 376 377 /* XXX only 1-byte functions for now */ 378 bst->bsr1 = dio_bus_space_read_oddbyte_1; 379 bst->bsw1 = dio_bus_space_write_oddbyte_1; 380 381 bst->bsrm1 = dio_bus_space_read_multi_oddbyte_1; 382 bst->bswm1 = dio_bus_space_write_multi_oddbyte_1; 383 384 bst->bsrr1 = dio_bus_space_read_region_oddbyte_1; 385 bst->bswr1 = dio_bus_space_write_region_oddbyte_1; 386 387 bst->bssm1 = dio_bus_space_set_multi_oddbyte_1; 388 389 bst->bssr1 = dio_bus_space_set_region_oddbyte_1; 390 } 391 392 static uint8_t 393 dio_bus_space_read_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 394 bus_size_t offset) 395 { 396 397 return *(volatile uint8_t *)(bsh + (offset << 1) + 1); 398 } 399 400 static void 401 dio_bus_space_write_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 402 bus_size_t offset, uint8_t val) 403 { 404 405 *(volatile uint8_t *)(bsh + (offset << 1) + 1) = val; 406 } 407 408 static void 409 dio_bus_space_read_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 410 bus_size_t offset, uint8_t *addr, bus_size_t len) 411 { 412 413 __asm volatile ( 414 " movl %0,%%a0 ;\n" 415 " movl %1,%%a1 ;\n" 416 " movl %2,%%d0 ;\n" 417 "1: movb %%a0@,%%a1@+ ;\n" 418 " subql #1,%%d0 ;\n" 419 " jne 1b" 420 : 421 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 422 : "%a0","%a1","%d0"); 423 } 424 425 static void 426 dio_bus_space_write_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 427 bus_size_t offset, const uint8_t *addr, bus_size_t len) 428 { 429 430 __asm volatile ( 431 " movl %0,%%a0 ;\n" 432 " movl %1,%%a1 ;\n" 433 " movl %2,%%d0 ;\n" 434 "1: movb %%a1@+,%%a0@ ;\n" 435 " subql #1,%%d0 ;\n" 436 " jne 1b" 437 : 438 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 439 : "%a0","%a1","%d0"); 440 } 441 442 static void 443 dio_bus_space_read_region_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 444 bus_size_t offset, uint8_t *addr, bus_size_t len) 445 { 446 __asm volatile ( 447 " movl %0,%%a0 ;\n" 448 " movl %1,%%a1 ;\n" 449 " movl %2,%%d0 ;\n" 450 "1: movb %%a0@,%%a1@+ ;\n" 451 " addql #2,%%a0 ;\n" 452 " subql #1,%%d0 ;\n" 453 " jne 1b" 454 : 455 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 456 : "%a0","%a1","%d0"); 457 } 458 459 static void 460 dio_bus_space_write_region_oddbyte_1(bus_space_tag_t bst, 461 bus_space_handle_t bsh, bus_size_t offset, const uint8_t *addr, 462 bus_size_t len) 463 { 464 465 __asm volatile ( 466 " movl %0,%%a0 ;\n" 467 " movl %1,%%a1 ;\n" 468 " movl %2,%%d0 ;\n" 469 "1: movb %%a1@+,%%a0@ ;\n" 470 " addql #2,%%a0 ;\n" 471 " subql #1,%%d0 ;\n" 472 " jne 1b" 473 : 474 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 475 : "%a0","%a1","%d0"); 476 } 477 478 static void 479 dio_bus_space_set_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 480 bus_size_t offset, uint8_t val, bus_size_t count) 481 { 482 __asm volatile ( 483 " movl %0,%%a0 ;\n" 484 " movl %1,%%d1 ;\n" 485 " movl %2,%%d0 ;\n" 486 "1: movb %%d1,%%a0@ ;\n" 487 " subql #1,%%d0 ;\n" 488 " jne 1b" 489 : 490 : "r" (bsh + (offset << 1) + 1), "g" (val), "g" (count) 491 : "%a0","%d0","%d1"); 492 } 493 494 static void 495 dio_bus_space_set_region_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 496 bus_size_t offset, uint8_t val, bus_size_t count) 497 { 498 499 __asm volatile ( 500 " movl %0,%%a0 ;\n" 501 " movl %1,%%d1 ;\n" 502 " movl %2,%%d0 ;\n" 503 "1: movb %%d1,%%a0@ ;\n" 504 " addql #2,%%a0 ;\n" 505 " subql #1,%%d0 ;\n" 506 " jne 1b" 507 : 508 : "r" (bsh + (offset << 1) + 1), "g" (val), "g" (count) 509 : "%a0","%d0","%d1"); 510 } 511
Indexes created Mon Sep 22 21:09:42 GMT 2025