dio.c revision 1.39.44.1
1 /* $NetBSD: dio.c,v 1.39.44.1 2021/03/22 02:00:56 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 1.39.44.1 2021/03/22 02:00:56 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_IATTR, "dio", 160 CFARG_EOL); 161 scode += scodesize; 162 } 163 } 164 165 static int 166 diosubmatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 167 { 168 struct dio_attach_args *da = aux; 169 170 if (cf->diocf_scode != DIOCF_SCODE_DEFAULT && 171 cf->diocf_scode != da->da_scode) 172 return 0; 173 174 return config_match(parent, cf, aux); 175 } 176 177 static int 178 dioprint(void *aux, const char *pnp) 179 { 180 struct dio_attach_args *da = aux; 181 char buf[128]; 182 183 if (pnp) 184 aprint_normal("%s at %s", 185 dio_devinfo(da, buf, sizeof(buf)), pnp); 186 aprint_normal(" scode %d ipl %d", da->da_scode, da->da_ipl); 187 return UNCONF; 188 } 189 190 /* 191 * Convert a select code to a system physical address. 192 */ 193 void * 194 dio_scodetopa(int scode) 195 { 196 u_long rval; 197 198 if (DIO_ISDIO(scode)) 199 rval = DIO_BASE + (scode * DIO_DEVSIZE); 200 else if (DIO_ISDIOII(scode)) 201 rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE); 202 else 203 rval = 0; 204 205 return (void *)rval; 206 } 207 208 /* 209 * Return the select code size for this device, defaulting to 1 210 * if we don't know what kind of device we have. 211 */ 212 static int 213 dio_scodesize(struct dio_attach_args *da) 214 { 215 int i; 216 217 /* 218 * Find the dio_devdata matchind the primary id. 219 * If we're a framebuffer, we also check the secondary id. 220 */ 221 for (i = 0; i < DIO_NDEVICES; i++) { 222 if (da->da_id == dio_devdatas[i].dd_id) { 223 if (DIO_ISFRAMEBUFFER(da->da_id)) { 224 if (da->da_secid == dio_devdatas[i].dd_secid) { 225 goto foundit; 226 } 227 } else { 228 foundit: 229 return dio_devdatas[i].dd_nscode; 230 } 231 } 232 } 233 234 /* 235 * Device is unknown. Print a warning and assume a default. 236 */ 237 aprint_error("WARNING: select code size unknown " 238 "for id = 0x%x secid = 0x%x\n", 239 da->da_id, da->da_secid); 240 return 1; 241 } 242 243 /* 244 * Return a reasonable description of a DIO device. 245 */ 246 static const char * 247 dio_devinfo(struct dio_attach_args *da, char *buf, size_t buflen) 248 { 249 #ifdef DIOVERBOSE 250 int i; 251 #endif 252 253 memset(buf, 0, buflen); 254 255 #ifdef DIOVERBOSE 256 /* 257 * Find the description matching our primary id. 258 * If we're a framebuffer, we also check the secondary id. 259 */ 260 for (i = 0; i < DIO_NDEVICES; i++) { 261 if (da->da_id == dio_devdescs[i].dd_id) { 262 if (DIO_ISFRAMEBUFFER(da->da_id)) { 263 if (da->da_secid == dio_devdescs[i].dd_secid) { 264 goto foundit; 265 } 266 } else { 267 foundit: 268 snprintf(buf, buflen, "%s", 269 dio_devdescs[i].dd_desc); 270 return buf; 271 } 272 } 273 } 274 #endif /* DIOVERBOSE */ 275 276 /* 277 * Device is unknown. Construct something reasonable. 278 */ 279 snprintf(buf, buflen, "device id = 0x%x secid = 0x%x", 280 da->da_id, da->da_secid); 281 return buf; 282 } 283 284 /* 285 * Establish an interrupt handler for a DIO device. 286 */ 287 void * 288 dio_intr_establish(int (*func)(void *), void *arg, int ipl, int priority) 289 { 290 void *ih; 291 292 ih = intr_establish(func, arg, ipl, priority); 293 294 if (priority == IPL_BIO) 295 dmacomputeipl(); 296 297 return ih; 298 } 299 300 /* 301 * Remove an interrupt handler for a DIO device. 302 */ 303 void 304 dio_intr_disestablish(void *arg) 305 { 306 struct hp300_intrhand *ih = arg; 307 int priority = ih->ih_priority; 308 309 intr_disestablish(arg); 310 311 if (priority == IPL_BIO) 312 dmacomputeipl(); 313 } 314 315 /* 316 * DIO specific bus_space(9) support functions. 317 */ 318 static uint8_t dio_bus_space_read_oddbyte_1(bus_space_tag_t, 319 bus_space_handle_t, bus_size_t); 320 static void dio_bus_space_write_oddbyte_1(bus_space_tag_t, 321 bus_space_handle_t, bus_size_t, uint8_t); 322 323 static void dio_bus_space_read_multi_oddbyte_1(bus_space_tag_t, 324 bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t); 325 static void dio_bus_space_write_multi_oddbyte_1(bus_space_tag_t, 326 bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t); 327 328 static void dio_bus_space_read_region_oddbyte_1(bus_space_tag_t, 329 bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t); 330 static void dio_bus_space_write_region_oddbyte_1(bus_space_tag_t, 331 bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t); 332 333 static void dio_bus_space_set_multi_oddbyte_1(bus_space_tag_t, 334 bus_space_handle_t, bus_size_t, uint8_t, bus_size_t); 335 336 static void dio_bus_space_set_region_oddbyte_1(bus_space_tag_t, 337 bus_space_handle_t, bus_size_t, uint8_t, bus_size_t); 338 339 /* 340 * dio_set_bus_space_oddbyte(): 341 * Override bus_space functions in bus_space_tag_t 342 * for devices which have odd byte address space. 343 */ 344 void 345 dio_set_bus_space_oddbyte(bus_space_tag_t bst) 346 { 347 348 /* XXX only 1-byte functions for now */ 349 bst->bsr1 = dio_bus_space_read_oddbyte_1; 350 bst->bsw1 = dio_bus_space_write_oddbyte_1; 351 352 bst->bsrm1 = dio_bus_space_read_multi_oddbyte_1; 353 bst->bswm1 = dio_bus_space_write_multi_oddbyte_1; 354 355 bst->bsrr1 = dio_bus_space_read_region_oddbyte_1; 356 bst->bswr1 = dio_bus_space_write_region_oddbyte_1; 357 358 bst->bssm1 = dio_bus_space_set_multi_oddbyte_1; 359 360 bst->bssr1 = dio_bus_space_set_region_oddbyte_1; 361 } 362 363 static uint8_t 364 dio_bus_space_read_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 365 bus_size_t offset) 366 { 367 368 return *(volatile uint8_t *)(bsh + (offset << 1) + 1); 369 } 370 371 static void 372 dio_bus_space_write_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 373 bus_size_t offset, uint8_t val) 374 { 375 376 *(volatile uint8_t *)(bsh + (offset << 1) + 1) = val; 377 } 378 379 static void 380 dio_bus_space_read_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 381 bus_size_t offset, uint8_t *addr, bus_size_t len) 382 { 383 384 __asm volatile ( 385 " movl %0,%%a0 ;\n" 386 " movl %1,%%a1 ;\n" 387 " movl %2,%%d0 ;\n" 388 "1: movb %%a0@,%%a1@+ ;\n" 389 " subql #1,%%d0 ;\n" 390 " jne 1b" 391 : 392 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 393 : "%a0","%a1","%d0"); 394 } 395 396 static void 397 dio_bus_space_write_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 398 bus_size_t offset, const uint8_t *addr, bus_size_t len) 399 { 400 401 __asm volatile ( 402 " movl %0,%%a0 ;\n" 403 " movl %1,%%a1 ;\n" 404 " movl %2,%%d0 ;\n" 405 "1: movb %%a1@+,%%a0@ ;\n" 406 " subql #1,%%d0 ;\n" 407 " jne 1b" 408 : 409 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 410 : "%a0","%a1","%d0"); 411 } 412 413 static void 414 dio_bus_space_read_region_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 415 bus_size_t offset, uint8_t *addr, bus_size_t len) 416 { 417 __asm volatile ( 418 " movl %0,%%a0 ;\n" 419 " movl %1,%%a1 ;\n" 420 " movl %2,%%d0 ;\n" 421 "1: movb %%a0@,%%a1@+ ;\n" 422 " addql #2,%%a0 ;\n" 423 " subql #1,%%d0 ;\n" 424 " jne 1b" 425 : 426 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 427 : "%a0","%a1","%d0"); 428 } 429 430 static void 431 dio_bus_space_write_region_oddbyte_1(bus_space_tag_t bst, 432 bus_space_handle_t bsh, bus_size_t offset, const uint8_t *addr, 433 bus_size_t len) 434 { 435 436 __asm volatile ( 437 " movl %0,%%a0 ;\n" 438 " movl %1,%%a1 ;\n" 439 " movl %2,%%d0 ;\n" 440 "1: movb %%a1@+,%%a0@ ;\n" 441 " addql #2,%%a0 ;\n" 442 " subql #1,%%d0 ;\n" 443 " jne 1b" 444 : 445 : "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len) 446 : "%a0","%a1","%d0"); 447 } 448 449 static void 450 dio_bus_space_set_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 451 bus_size_t offset, uint8_t val, bus_size_t count) 452 { 453 __asm volatile ( 454 " movl %0,%%a0 ;\n" 455 " movl %1,%%d1 ;\n" 456 " movl %2,%%d0 ;\n" 457 "1: movb %%d1,%%a0@ ;\n" 458 " subql #1,%%d0 ;\n" 459 " jne 1b" 460 : 461 : "r" (bsh + (offset << 1) + 1), "g" (val), "g" (count) 462 : "%a0","%d0","%d1"); 463 } 464 465 static void 466 dio_bus_space_set_region_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh, 467 bus_size_t offset, uint8_t val, bus_size_t count) 468 { 469 470 __asm volatile ( 471 " movl %0,%%a0 ;\n" 472 " movl %1,%%d1 ;\n" 473 " movl %2,%%d0 ;\n" 474 "1: movb %%d1,%%a0@ ;\n" 475 " addql #2,%%a0 ;\n" 476 " subql #1,%%d0 ;\n" 477 " jne 1b" 478 : 479 : "r" (bsh + (offset << 1) + 1), "g" (val), "g" (count) 480 : "%a0","%d0","%d1"); 481 } 482
Indexes created Wed Oct 22 06:10:02 GMT 2025