dio.c revision 1.40
1 /* $NetBSD: dio.c,v 1.40 2021/04/24 23:36:37 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 1.40 2021/04/24 23:36:37 thorpej Exp $"); 38 39 #define _HP300_INTR_H_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 int 82 diomatch(device_t parent, cfdata_t cf, void *aux) 83 { 84 static int dio_matched = 0; 85 86 /* Allow only one instance. */ 87 if (dio_matched) 88 return 0; 89 90 dio_matched = 1; 91 return 1; 92 } 93 94 static void 95 dioattach(device_t parent, device_t self, void *aux) 96 { 97 struct dio_softc *sc = device_private(self); 98 struct dio_attach_args da; 99 bus_addr_t pa; 100 void *va; 101 bus_space_tag_t bst = &sc->sc_tag; 102 bus_space_handle_t bsh; 103 int scode, scmax, scodesize; 104 105 sc->sc_dev = self; 106 aprint_normal("\n"); 107 108 memset(bst, 0, sizeof(struct bus_space_tag)); 109 bst->bustype = HP300_BUS_SPACE_DIO; 110 111 scmax = DIO_SCMAX(machineid); 112 113 for (scode = 0; scode < scmax; ) { 114 if (DIO_INHOLE(scode)) { 115 scode++; 116 continue; 117 } 118 119 /* 120 * Temporarily map the space corresponding to 121 * the current select code unless: 122 */ 123 pa = (bus_addr_t)dio_scodetopa(scode); 124 if (bus_space_map(bst, pa, PAGE_SIZE, 0, &bsh)) { 125 aprint_error_dev(self, "can't map scode %d\n", scode); 126 scode++; 127 continue; 128 } 129 va = bus_space_vaddr(bst, bsh); 130 131 /* Check for hardware. */ 132 if (badaddr(va)) { 133 bus_space_unmap(bst, bsh, PAGE_SIZE); 134 scode++; 135 continue; 136 } 137 138 /* Fill out attach args. */ 139 memset(&da, 0, sizeof(da)); 140 da.da_bst = bst; 141 da.da_scode = scode; 142 143 da.da_id = DIO_ID(va); 144 if (DIO_ISFRAMEBUFFER(da.da_id)) 145 da.da_secid = DIO_SECID(va); 146 da.da_addr = pa; 147 da.da_size = DIO_SIZE(scode, va); 148 scodesize = dio_scodesize(&da); 149 if (DIO_ISDIO(scode)) 150 da.da_size *= scodesize; 151 da.da_ipl = DIO_IPL(va); 152 153 /* No longer need the device to be mapped. */ 154 bus_space_unmap(bst, bsh, PAGE_SIZE); 155 156 /* Attach matching device. */ 157 config_found(self, &da, dioprint, 158 CFARG_SUBMATCH, diosubmatch, 159 CFARG_EOL); 160 scode += scodesize; 161 } 162 } 163 164 static int 165 diosubmatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 166 { 167 struct dio_attach_args *da = aux; 168 169 if (cf->diocf_scode != DIOCF_SCODE_DEFAULT && 170 cf->diocf_scode != da->da_scode) 171 return 0; 172 173 return config_match(parent, cf, aux); 174 } 175 176 static int 177 dioprint(void *aux, const char *pnp) 178 { 179 struct dio_attach_args *da = aux; 180 char buf[128]; 181 182 if (pnp) 183 aprint_normal("%s at %s", 184 dio_devinfo(da, buf, sizeof(buf)), pnp); 185 aprint_normal(" scode %d ipl %d", da->da_scode, da->da_ipl); 186 return UNCONF; 187 } 188 189 /* 190 * Convert a select code to a system physical address. 191 */ 192 void * 193 dio_scodetopa(int scode) 194 { 195 u_long rval; 196 197 if (DIO_ISDIO(scode)) 198 rval = DIO_BASE + (scode * DIO_DEVSIZE); 199 else if (DIO_ISDIOII(scode)) 200 rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE); 201 else 202 rval = 0; 203 204 return (void *)rval; 205 } 206 207 /* 208 * Return the select code size for this device, defaulting to 1 209 * if we don't know what kind of device we have. 210 */ 211 static int 212 dio_scodesize(struct dio_attach_args *da) 213 { 214 int i; 215 216 /* 217 * Find the dio_devdata matchind the primary id. 218 * If we're a framebuffer, we also check the secondary id. 219 */ 220 for (i = 0; i < DIO_NDEVICES; i++) { 221 if (da->da_id == dio_devdatas[i].dd_id) { 222 if (DIO_ISFRAMEBUFFER(da->da_id)) { 223 if (da->da_secid == dio_devdatas[i].dd_secid) { 224 goto foundit; 225 } 226 } else { 227 foundit: 228 return dio_devdatas[i].dd_nscode; 229 } 230 } 231 } 232 233 /* 234 * Device is unknown. Print a warning and assume a default. 235 */ 236 aprint_error("WARNING: select code size unknown " 237 "for id = 0x%x secid = 0x%x\n", 238 da->da_id, da->da_secid); 239 return 1; 240 } 241 242 /* 243 * Return a reasonable description of a DIO device. 244 */ 245 static const char * 246 dio_devinfo(struct dio_attach_args *da, char *buf, size_t buflen) 247 { 248 #ifdef DIOVERBOSE 249 int i; 250 #endif 251 252 memset(buf, 0, buflen); 253 254 #ifdef DIOVERBOSE 255 /* 256 * Find the description matching our primary id. 257 * If we're a framebuffer, we also check the secondary id. 258 */ 259 for (i = 0; i < DIO_NDEVICES; i++) { 260 if (da->da_id == dio_devdescs[i].dd_id) { 261 if (DIO_ISFRAMEBUFFER(da->da_id)) { 262 if (da->da_secid == dio_devdescs[i].dd_secid) { 263 goto foundit; 264 } 265 } else { 266 foundit: 267 snprintf(buf, buflen, "%s", 268 dio_devdescs[i].dd_desc); 269 return buf; 270 } 271 } 272 } 273 #endif /* DIOVERBOSE */ 274 275 /* 276 * Device is unknown. Construct something reasonable. 277 */ 278 snprintf(buf, buflen, "device id = 0x%x secid = 0x%x", 279 da->da_id, da->da_secid); 280 return buf; 281 } 282 283 /* 284 * Establish an interrupt handler for a DIO device. 285 */ 286 void * 287 dio_intr_establish(int (*func)(void *), void *arg, int ipl, int priority) 288 { 289 void *ih; 290 291 ih = intr_establish(func, arg, ipl, priority); 292 293 if (priority == IPL_BIO) 294 dmacomputeipl(); 295 296 return ih; 297 } 298 299 /* 300 * Remove an interrupt handler for a DIO device. 301 */ 302 void 303 dio_intr_disestablish(void *arg) 304 { 305 struct hp300_intrhand *ih = arg; 306 int priority = ih->ih_priority; 307 308 intr_disestablish(arg); 309 310 if (priority == IPL_BIO) 311 dmacomputeipl(); 312 } 313 314 /* 315 * DIO specific bus_space(9) support functions. 316 */ 317 static uint8_t dio_bus_space_read_oddbyte_1(bus_space_tag_t, 318 bus_space_handle_t, bus_size_t); 319 static void dio_bus_space_write_oddbyte_1(bus_space_tag_t, 320 bus_space_handle_t, bus_size_t, uint8_t); 321 322 static void dio_bus_space_read_multi_oddbyte_1(bus_space_tag_t, 323 bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t); 324 static void dio_bus_space_write_multi_oddbyte_1(bus_space_tag_t, 325 bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t); 326 327 static void dio_bus_space_read_region_oddbyte_1(bus_space_tag_t, 328 bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t); 329 static void dio_bus_space_write_region_oddbyte_1(bus_space_tag_t, 330 bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t); 331 332 static void dio_bus_space_set_multi_oddbyte_1(bus_space_tag_t, 333 bus_space_handle_t, bus_size_t, uint8_t, bus_size_t); 334 335 static void dio_bus_space_set_region_oddbyte_1(bus_space_tag_t, 336 bus_space_handle_t, bus_size_t, uint8_t, bus_size_t); 337 338 /* 339 * dio_set_bus_space_oddbyte(): 340 * Override bus_space functions in bus_space_tag_t 341 * for devices which have odd byte address space. 342 */ 343 void 344 dio_set_bus_space_oddbyte(bus_space_tag_t bst) 345 { 346 347 /* XXX only 1-byte functions for now */ 348 bst->bsr1 = dio_bus_space_read_oddbyte_1; 349 bst->bsw1 = dio_bus_space_write_oddbyte_1; 350 351 bst->bsrm1 = dio_bus_space_read_multi_oddbyte_1; 352 bst->bswm1 = dio_bus_space_write_multi_oddbyte_1; 353 354 bst->bsrr1 = dio_bus_space_read_region_oddbyte_1; 355 bst->bswr1 = dio_bus_space_write_region_oddbyte_1; 356 357 bst->bssm1 = dio_bus_space_set_multi_oddbyte_1; 358 359 bst->bssr1 = dio_bus_space_set_region_oddbyte_1; 360 } 361 362 static uint8_t 363 dio_bus_space_read_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 364 bus_size_t offset) 365 { 366 367 return *(volatile uint8_t *)(bsh + (offset << 1) + 1); 368 } 369 370 static void 371 dio_bus_space_write_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 372 bus_size_t offset, uint8_t val) 373 { 374 375 *(volatile uint8_t *)(bsh + (offset << 1) + 1) = val; 376 } 377 378 static void 379 dio_bus_space_read_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 380 bus_size_t offset, uint8_t *addr, bus_size_t len) 381 { 382 383 __asm volatile ( 384 " movl %0,%%a0 ;\n" 385 " movl %1,%%a1 ;\n" 386 " movl %2,%%d0 ;\n" 387 "1: movb %%a0@,%%a1@+ ;\n" 388 " subql #1,%%d0 ;\n" 389 " jne 1b" 390 : 391 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 392 : "%a0","%a1","%d0"); 393 } 394 395 static void 396 dio_bus_space_write_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 397 bus_size_t offset, const uint8_t *addr, bus_size_t len) 398 { 399 400 __asm volatile ( 401 " movl %0,%%a0 ;\n" 402 " movl %1,%%a1 ;\n" 403 " movl %2,%%d0 ;\n" 404 "1: movb %%a1@+,%%a0@ ;\n" 405 " subql #1,%%d0 ;\n" 406 " jne 1b" 407 : 408 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 409 : "%a0","%a1","%d0"); 410 } 411 412 static void 413 dio_bus_space_read_region_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 414 bus_size_t offset, uint8_t *addr, bus_size_t len) 415 { 416 __asm volatile ( 417 " movl %0,%%a0 ;\n" 418 " movl %1,%%a1 ;\n" 419 " movl %2,%%d0 ;\n" 420 "1: movb %%a0@,%%a1@+ ;\n" 421 " addql #2,%%a0 ;\n" 422 " subql #1,%%d0 ;\n" 423 " jne 1b" 424 : 425 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 426 : "%a0","%a1","%d0"); 427 } 428 429 static void 430 dio_bus_space_write_region_oddbyte_1(bus_space_tag_t bst, 431 bus_space_handle_t bsh, bus_size_t offset, const uint8_t *addr, 432 bus_size_t len) 433 { 434 435 __asm volatile ( 436 " movl %0,%%a0 ;\n" 437 " movl %1,%%a1 ;\n" 438 " movl %2,%%d0 ;\n" 439 "1: movb %%a1@+,%%a0@ ;\n" 440 " addql #2,%%a0 ;\n" 441 " subql #1,%%d0 ;\n" 442 " jne 1b" 443 : 444 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 445 : "%a0","%a1","%d0"); 446 } 447 448 static void 449 dio_bus_space_set_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 450 bus_size_t offset, uint8_t val, bus_size_t count) 451 { 452 __asm volatile ( 453 " movl %0,%%a0 ;\n" 454 " movl %1,%%d1 ;\n" 455 " movl %2,%%d0 ;\n" 456 "1: movb %%d1,%%a0@ ;\n" 457 " subql #1,%%d0 ;\n" 458 " jne 1b" 459 : 460 : "r" (bsh + (offset << 1) + 1), "g" (val), "g" (count) 461 : "%a0","%d0","%d1"); 462 } 463 464 static void 465 dio_bus_space_set_region_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 466 bus_size_t offset, uint8_t val, bus_size_t count) 467 { 468 469 __asm volatile ( 470 " movl %0,%%a0 ;\n" 471 " movl %1,%%d1 ;\n" 472 " movl %2,%%d0 ;\n" 473 "1: movb %%d1,%%a0@ ;\n" 474 " addql #2,%%a0 ;\n" 475 " subql #1,%%d0 ;\n" 476 " jne 1b" 477 : 478 : "r" (bsh + (offset << 1) + 1), "g" (val), "g" (count) 479 : "%a0","%d0","%d1"); 480 } 481
Indexes created Wed Sep 24 15:09:51 GMT 2025