1 /* $NetBSD: ebus.c,v 1.42 2022/01/22 11:49:16 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1999, 2000 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * EBus support for PCI based SPARC systems (ms-IIep, Ultra). 31 * EBus is documented in PCIO manual (Sun Part#: 802-7837-01). 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: ebus.c,v 1.42 2022/01/22 11:49:16 thorpej Exp $"); 36 37 #if defined(DEBUG) && !defined(EBUS_DEBUG) 38 #define EBUS_DEBUG 39 #endif 40 41 #ifdef EBUS_DEBUG 42 #define EDB_PROM 0x01 43 #define EDB_CHILD 0x02 44 #define EDB_INTRMAP 0x04 45 #define EDB_BUSMAP 0x08 46 #define EDB_BUSDMA 0x10 47 #define EDB_INTR 0x20 48 int ebus_debug = 0; 49 #define DPRINTF(l, s) do { if (ebus_debug & l) printf s; } while (0) 50 #else 51 #define DPRINTF(l, s) 52 #endif 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/device.h> 57 #include <sys/errno.h> 58 #include <sys/malloc.h> 59 #include <sys/kmem.h> 60 #include <sys/callout.h> 61 #include <sys/kernel.h> 62 63 #define _SPARC_BUS_DMA_PRIVATE 64 #include <sys/bus.h> 65 #include <machine/autoconf.h> 66 67 #include <dev/pci/pcivar.h> 68 #include <dev/pci/pcireg.h> 69 #include <dev/pci/pcidevs.h> 70 71 #include <dev/ofw/ofw_pci.h> 72 73 #include <dev/ebus/ebusreg.h> 74 #include <dev/ebus/ebusvar.h> 75 76 #include "opt_blink.h" 77 78 volatile uint32_t *ebus_LED = NULL; 79 80 #ifdef BLINK 81 static callout_t ebus_blink_ch; 82 static void ebus_blink(void *); 83 #endif 84 85 struct ebus_softc { 86 device_t sc_dev; 87 device_t sc_parent; /* PCI bus */ 88 89 int sc_node; /* PROM node */ 90 91 bus_space_tag_t sc_bustag; /* mem tag from pci */ 92 93 /* 94 * "reg" contains exactly the info we'd get by processing 95 * "ranges", so don't bother with "ranges" and use "reg" directly. 96 */ 97 struct ofw_pci_register *sc_reg; 98 int sc_nreg; 99 }; 100 101 static int ebus_match(device_t, cfdata_t, void *); 102 static void ebus_attach(device_t, device_t, void *); 103 104 CFATTACH_DECL_NEW(ebus, sizeof(struct ebus_softc), 105 ebus_match, ebus_attach, NULL, NULL); 106 107 static int ebus_setup_attach_args(struct ebus_softc *, bus_space_tag_t, 108 bus_dma_tag_t, int, struct ebus_attach_args *); 109 static void ebus_destroy_attach_args(struct ebus_attach_args *); 110 static int ebus_print(void *, const char *); 111 112 /* 113 * here are our bus space and bus DMA routines. 114 */ 115 static paddr_t ebus_bus_mmap(bus_space_tag_t, bus_addr_t, off_t, int, int); 116 static int _ebus_bus_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, 117 vaddr_t, bus_space_handle_t *); 118 static void *ebus_intr_establish(bus_space_tag_t, int, int, 119 int (*)(void *), void *, void (*)(void)); 120 121 static bus_dma_tag_t ebus_alloc_dma_tag(struct ebus_softc *, bus_dma_tag_t); 122 123 124 /* 125 * Working around PROM bogosity. 126 * 127 * EBus doesn't have official OFW binding. sparc64 has a de-facto 128 * standard but patching it in in prompatch.c and then decoding it 129 * here would be an overkill for ms-IIep. 130 * 131 * So we assume that all ms-IIep based systems use PCIO chip only in 132 * "motherboard mode" with interrupt lines wired directly to ms-IIep 133 * interrupt inputs. 134 * 135 * Note that this is ineligible for prompatch.c, as we are not 136 * correcting PROM to conform to some established standard, this hack 137 * is tied to this version of ebus driver and as such it's better stay 138 * private to the driver. 139 */ 140 141 struct msiiep_ebus_intr_wiring { 142 const char *name; /* PROM node */ 143 int line; /* ms-IIep interrupt input */ 144 }; 145 146 static const struct msiiep_ebus_intr_wiring krups_ebus_intr_wiring[] = { 147 { "su", 0 }, { "8042", 0 }, { "sound", 3 } 148 }; 149 150 static const struct msiiep_ebus_intr_wiring espresso_ebus_intr_wiring[] = { 151 { "su", 0 }, { "8042", 0 }, { "sound", 3 }, { "parallel", 4 } 152 }; 153 154 155 struct msiiep_known_ebus_wiring { 156 const char *model; 157 const struct msiiep_ebus_intr_wiring *map; 158 int mapsize; 159 }; 160 161 #define MSIIEP_MODEL_WIRING(name, map) \ 162 { name, map, sizeof(map)/sizeof(map[0]) } 163 164 static const struct msiiep_known_ebus_wiring known_models[] = { 165 MSIIEP_MODEL_WIRING("SUNW,501-4267", krups_ebus_intr_wiring), 166 MSIIEP_MODEL_WIRING("SUNW,375-0059", espresso_ebus_intr_wiring), 167 { NULL, NULL, 0} 168 }; 169 170 171 /* 172 * XXX: This assumes single EBus. However I don't think any ms-IIep 173 * system ever used more than one. In any case, without looking at a 174 * system with multiple PCIO chips I don't know how to correctly 175 * program the driver to handle PROM glitches in them, so for the time 176 * being just use globals. 177 */ 178 static const struct msiiep_ebus_intr_wiring *wiring_map; 179 static int wiring_map_size; 180 181 static int ebus_init_wiring_table(struct ebus_softc *); 182 183 184 static int 185 ebus_match(device_t parent, cfdata_t cf, void *aux) 186 { 187 struct pci_attach_args *pa = aux; 188 char name[10]; 189 int node; 190 191 /* Only attach if there's a PROM node. */ 192 node = PCITAG_NODE(pa->pa_tag); 193 if (node == -1) 194 return (0); 195 196 prom_getpropstringA(node, "name", name, sizeof name); 197 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE 198 && PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN 199 && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS 200 && strcmp(name, "ebus") == 0) 201 return (1); 202 203 return (0); 204 } 205 206 207 static int 208 ebus_init_wiring_table(struct ebus_softc *sc) 209 { 210 const struct msiiep_known_ebus_wiring *p; 211 char buf[32]; 212 char *model; 213 214 if (wiring_map != NULL) { 215 printf("%s: global ebus wiring map already initialized\n", 216 device_xname(sc->sc_dev)); 217 return (0); 218 } 219 220 model = prom_getpropstringA(prom_findroot(), "model", 221 buf, sizeof(buf)); 222 if (model == NULL) 223 panic("ebus_init_wiring_table: no \"model\" property"); 224 225 for (p = known_models; p->model != NULL; ++p) 226 if (strcmp(model, p->model) == 0) { 227 wiring_map = p->map; 228 wiring_map_size = p->mapsize; 229 return (1); 230 } 231 232 /* not found? we should have failed in pci_attach_hook then. */ 233 panic("ebus_init_wiring_table: unknown model %s", model); 234 } 235 236 237 /* 238 * attach an ebus and all its children. this code is modeled 239 * after the sbus code which does similar things. 240 */ 241 static void 242 ebus_attach(device_t parent, device_t self, void *aux) 243 { 244 struct ebus_softc *sc = device_private(self); 245 struct pci_attach_args *pa = aux; 246 struct ebus_attach_args ea; 247 bus_space_tag_t sbt; 248 bus_dma_tag_t dmatag; 249 bus_space_handle_t hLED; 250 pcireg_t base14; 251 int node, error; 252 char devinfo[256]; 253 254 sc->sc_dev = self; 255 256 #ifdef BLINK 257 callout_init(&ebus_blink_ch, 0); 258 #endif 259 260 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 261 printf(": %s, revision 0x%02x\n", 262 devinfo, PCI_REVISION(pa->pa_class)); 263 264 node = PCITAG_NODE(pa->pa_tag); 265 if (node == -1) 266 panic("%s: unable to find ebus node", device_xname(self)); 267 268 if (ebus_init_wiring_table(sc) == 0) 269 return; 270 271 /* map the LED register */ 272 base14 = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x14); 273 if (bus_space_map(pa->pa_memt, base14 + 0x726000, 4, 0, &hLED) == 0) { 274 ebus_LED = bus_space_vaddr(pa->pa_memt, hLED); 275 #ifdef BLINK 276 ebus_blink((void *)0); 277 #endif 278 } else { 279 printf("unable to map the LED register\n"); 280 } 281 282 sc->sc_node = node; 283 sc->sc_parent = parent; /* XXX: unused so far */ 284 sc->sc_bustag = pa->pa_memt; /* EBus only does PCI MEM32 space */ 285 286 if ((sbt = bus_space_tag_alloc(sc->sc_bustag, sc)) == NULL) 287 panic("unable to allocate ebus bus tag"); 288 289 sbt->sparc_bus_map = _ebus_bus_map; 290 sbt->sparc_bus_mmap = ebus_bus_mmap; 291 sbt->sparc_intr_establish = ebus_intr_establish; 292 293 dmatag = ebus_alloc_dma_tag(sc, pa->pa_dmat); 294 295 /* 296 * Setup ranges. The interesting thing is that we use "reg" 297 * not "ranges", since "reg" on ebus has exactly the data we'd 298 * get by processing "ranges". 299 */ 300 error = prom_getprop(node, "reg", sizeof(struct ofw_pci_register), 301 &sc->sc_nreg, &sc->sc_reg); 302 if (error) 303 panic("%s: unable to read ebus registers (error %d)", 304 device_xname(self), error); 305 306 /* 307 * now attach all our children 308 */ 309 DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node)); 310 devhandle_t selfh = device_handle(self); 311 for (node = firstchild(node); node; node = nextsibling(node)) { 312 char *name = prom_getpropstring(node, "name"); 313 314 if (ebus_setup_attach_args(sc, sbt, dmatag, node, &ea) != 0) { 315 printf("ebus_attach: %s: incomplete\n", name); 316 continue; 317 } 318 DPRINTF(EDB_CHILD, 319 ("- found child `%s', attaching\n", ea.ea_name)); 320 (void)config_found(self, &ea, ebus_print, 321 CFARGS(.devhandle = prom_node_to_devhandle(selfh, node))); 322 ebus_destroy_attach_args(&ea); 323 } 324 } 325 326 static int 327 ebus_setup_attach_args(struct ebus_softc *sc, 328 bus_space_tag_t bustag, bus_dma_tag_t dmatag, int node, 329 struct ebus_attach_args *ea) 330 { 331 int n, err; 332 333 memset(ea, 0, sizeof(struct ebus_attach_args)); 334 335 err = prom_getprop(node, "name", 1, &n, &ea->ea_name); 336 if (err != 0) 337 return (err); 338 KASSERT(ea->ea_name[n-1] == '\0'); 339 340 ea->ea_node = node; 341 ea->ea_bustag = bustag; 342 ea->ea_dmatag = dmatag; 343 344 err = prom_getprop(node, "reg", sizeof(struct ebus_regs), 345 &ea->ea_nreg, &ea->ea_reg); 346 if (err != 0) 347 return (err); 348 349 /* 350 * On Ultra the bar is the _offset_ of the BAR in PCI config 351 * space but in (some?) ms-IIep systems (e.g. Krups) it's the 352 * _number_ of the BAR - e.g. BAR1 is represented by 1 in 353 * Krups PROM, while on Ultra it's 0x14. Fix it here. 354 */ 355 for (n = 0; n < ea->ea_nreg; ++n) 356 if (ea->ea_reg[n].hi < PCI_MAPREG_START) { 357 ea->ea_reg[n].hi = PCI_MAPREG_START 358 + ea->ea_reg[n].hi * sizeof(pcireg_t); 359 } 360 361 err = prom_getprop(node, "address", sizeof(uint32_t), 362 &ea->ea_nvaddr, &ea->ea_vaddr); 363 if (err != ENOENT) { 364 if (err != 0) 365 return (err); 366 367 if (ea->ea_nreg != ea->ea_nvaddr) 368 printf("ebus loses: device %s: %d regs and %d addrs\n", 369 ea->ea_name, ea->ea_nreg, ea->ea_nvaddr); 370 } else 371 ea->ea_nvaddr = 0; 372 373 /* XXX: "interrupts" hack */ 374 for (n = 0; n < wiring_map_size; ++n) { 375 const struct msiiep_ebus_intr_wiring *w = &wiring_map[n]; 376 if (strcmp(w->name, ea->ea_name) == 0) { 377 ea->ea_intr = malloc(sizeof(uint32_t), 378 M_DEVBUF, M_WAITOK); 379 ea->ea_intr[0] = w->line; 380 ea->ea_nintr = 1; 381 break; 382 } 383 } 384 385 return (0); 386 } 387 388 static void 389 ebus_destroy_attach_args(struct ebus_attach_args *ea) 390 { 391 392 if (ea->ea_name) 393 free((void *)ea->ea_name, M_DEVBUF); 394 if (ea->ea_reg) 395 free((void *)ea->ea_reg, M_DEVBUF); 396 if (ea->ea_intr) 397 free((void *)ea->ea_intr, M_DEVBUF); 398 if (ea->ea_vaddr) 399 free((void *)ea->ea_vaddr, M_DEVBUF); 400 } 401 402 static int 403 ebus_print(void *aux, const char *p) 404 { 405 struct ebus_attach_args *ea = aux; 406 int i; 407 408 if (p) 409 aprint_normal("%s at %s", ea->ea_name, p); 410 for (i = 0; i < ea->ea_nreg; ++i) 411 aprint_normal("%s bar %x offset 0x%x", i == 0 ? "" : ",", 412 ea->ea_reg[i].hi, ea->ea_reg[i].lo); 413 for (i = 0; i < ea->ea_nintr; ++i) 414 aprint_normal(" line %d", ea->ea_intr[i]); 415 return (UNCONF); 416 } 417 418 419 /* 420 * bus space and bus DMA methods below here 421 */ 422 static bus_dma_tag_t 423 ebus_alloc_dma_tag(struct ebus_softc *sc, bus_dma_tag_t pdt) 424 { 425 bus_dma_tag_t dt; 426 427 dt = kmem_zalloc(sizeof(*dt), KM_SLEEP); 428 dt->_cookie = sc; 429 #define PCOPY(x) dt->x = pdt->x 430 PCOPY(_dmamap_create); 431 PCOPY(_dmamap_destroy); 432 PCOPY(_dmamap_load); 433 PCOPY(_dmamap_load_mbuf); 434 PCOPY(_dmamap_load_uio); 435 PCOPY(_dmamap_load_raw); 436 PCOPY(_dmamap_unload); 437 PCOPY(_dmamap_sync); 438 PCOPY(_dmamem_alloc); 439 PCOPY(_dmamem_free); 440 PCOPY(_dmamem_map); 441 PCOPY(_dmamem_unmap); 442 PCOPY(_dmamem_mmap); 443 #undef PCOPY 444 return (dt); 445 } 446 447 /* 448 * bus space support. <sparc64/dev/psychoreg.h> has a discussion 449 * about PCI physical addresses, which also applies to ebus. 450 */ 451 static int 452 _ebus_bus_map(bus_space_tag_t t, bus_addr_t ba, bus_size_t size, int flags, 453 vaddr_t va, bus_space_handle_t *hp) 454 { 455 struct ebus_softc *sc = t->cookie; 456 u_int bar; 457 paddr_t offset; 458 int i; 459 460 bar = BUS_ADDR_IOSPACE(ba); 461 offset = BUS_ADDR_PADDR(ba); 462 463 DPRINTF(EDB_BUSMAP, 464 ("\n_ebus_bus_map: bar %d offset %08x sz %x flags %x va %p\n", 465 (int)bar, (uint32_t)offset, (uint32_t)size, 466 flags, (void *)va)); 467 468 /* EBus has only two BARs */ 469 if (PCI_MAPREG_NUM(bar) > 1) { 470 DPRINTF(EDB_BUSMAP, 471 ("\n_ebus_bus_map: impossible bar\n")); 472 return (EINVAL); 473 } 474 475 /* 476 * Almost all of the interesting ebus children are mapped by 477 * BAR1, the last entry in sc_reg[], so work our way backwards. 478 */ 479 for (i = sc->sc_nreg - 1; i >= 0; --i) { 480 bus_addr_t pciaddr; 481 uint32_t ss; 482 483 /* EBus only does MEM32 */ 484 ss = sc->sc_reg[i].phys_hi & OFW_PCI_PHYS_HI_SPACEMASK; 485 if (ss != OFW_PCI_PHYS_HI_SPACE_MEM32) 486 continue; 487 488 if (bar != (sc->sc_reg[i].phys_hi 489 & OFW_PCI_PHYS_HI_REGISTERMASK)) 490 continue; 491 492 pciaddr = (bus_addr_t)sc->sc_reg[i].phys_lo + offset; 493 494 if (pciaddr + size > sc->sc_reg[i].phys_lo 495 + sc->sc_reg[i].size_lo) 496 continue; 497 498 DPRINTF(EDB_BUSMAP, 499 ("_ebus_bus_map: mapping to PCI addr %x\n", 500 (uint32_t)pciaddr)); 501 502 /* pass it onto the pci controller */ 503 return (bus_space_map2(t->parent, pciaddr, size, 504 flags, va, hp)); 505 } 506 507 DPRINTF(EDB_BUSMAP, (": FAILED\n")); 508 return (EINVAL); 509 } 510 511 static paddr_t 512 ebus_bus_mmap(bus_space_tag_t t, bus_addr_t ba, off_t off, int prot, int flags) 513 { 514 515 /* XXX: not implemented yet */ 516 return (-1); 517 } 518 519 /* 520 * Install an interrupt handler for a EBus device. 521 */ 522 static void * 523 ebus_intr_establish(bus_space_tag_t t, int pri, int level, 524 int (*handler)(void *), void *arg, 525 void (*fastvec)(void)) 526 { 527 528 return (bus_intr_establish(t->parent, pri, level, handler, arg)); 529 } 530 531 #ifdef BLINK 532 533 static void 534 ebus_blink(void *zero) 535 { 536 register int s; 537 538 s = splhigh(); 539 *ebus_LED = ~*ebus_LED; 540 splx(s); 541 /* 542 * Blink rate is: 543 * full cycle every second if completely idle (loadav = 0) 544 * full cycle every 2 seconds if loadav = 1 545 * full cycle every 3 seconds if loadav = 2 546 * etc. 547 */ 548 s = (((averunnable.ldavg[0] + FSCALE) * hz) >> (FSHIFT + 1)); 549 callout_reset(&ebus_blink_ch, s, ebus_blink, NULL); 550 } 551 #endif 552
Indexes created Thu Sep 25 16:09:42 GMT 2025