1 /*- 2 * Copyright (C) 2002 Benno Rice. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 __FBSDID("$FreeBSD$"); 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/module.h> 32 #include <sys/bus.h> 33 #include <sys/conf.h> 34 #include <sys/kernel.h> 35 36 #include <dev/ofw/openfirm.h> 37 #include <dev/ofw/ofw_pci.h> 38 #include <dev/ofw/ofw_bus.h> 39 #include <dev/ofw/ofw_bus_subr.h> 40 41 #include <dev/pci/pcivar.h> 42 #include <dev/pci/pcireg.h> 43 44 #include <machine/bus.h> 45 #include <machine/intr_machdep.h> 46 #include <machine/md_var.h> 47 #include <machine/pio.h> 48 #include <machine/resource.h> 49 50 #include <sys/rman.h> 51 52 #include <powerpc/powermac/uninorthvar.h> 53 54 #include <vm/vm.h> 55 #include <vm/pmap.h> 56 57 #include "pcib_if.h" 58 59 #define UNINORTH_DEBUG 0 60 61 /* 62 * Device interface. 63 */ 64 static int uninorth_probe(device_t); 65 static int uninorth_attach(device_t); 66 67 /* 68 * Bus interface. 69 */ 70 static int uninorth_read_ivar(device_t, device_t, int, 71 uintptr_t *); 72 static struct resource * uninorth_alloc_resource(device_t bus, 73 device_t child, int type, int *rid, u_long start, 74 u_long end, u_long count, u_int flags); 75 static int uninorth_activate_resource(device_t bus, device_t child, 76 int type, int rid, struct resource *res); 77 78 /* 79 * pcib interface. 80 */ 81 static int uninorth_maxslots(device_t); 82 static u_int32_t uninorth_read_config(device_t, u_int, u_int, u_int, 83 u_int, int); 84 static void uninorth_write_config(device_t, u_int, u_int, u_int, 85 u_int, u_int32_t, int); 86 static int uninorth_route_interrupt(device_t, device_t, int); 87 88 /* 89 * OFW Bus interface 90 */ 91 92 static phandle_t uninorth_get_node(device_t bus, device_t dev); 93 94 /* 95 * Local routines. 96 */ 97 static int uninorth_enable_config(struct uninorth_softc *, u_int, 98 u_int, u_int, u_int); 99 100 /* 101 * Driver methods. 102 */ 103 static device_method_t uninorth_methods[] = { 104 /* Device interface */ 105 DEVMETHOD(device_probe, uninorth_probe), 106 DEVMETHOD(device_attach, uninorth_attach), 107 108 /* Bus interface */ 109 DEVMETHOD(bus_read_ivar, uninorth_read_ivar), 110 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 111 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 112 DEVMETHOD(bus_alloc_resource, uninorth_alloc_resource), 113 DEVMETHOD(bus_activate_resource, uninorth_activate_resource), 114 115 /* pcib interface */ 116 DEVMETHOD(pcib_maxslots, uninorth_maxslots), 117 DEVMETHOD(pcib_read_config, uninorth_read_config), 118 DEVMETHOD(pcib_write_config, uninorth_write_config), 119 DEVMETHOD(pcib_route_interrupt, uninorth_route_interrupt), 120 121 /* ofw_bus interface */ 122 DEVMETHOD(ofw_bus_get_node, uninorth_get_node), 123 124 DEVMETHOD_END 125 }; 126 127 static driver_t uninorth_driver = { 128 "pcib", 129 uninorth_methods, 130 sizeof(struct uninorth_softc) 131 }; 132 133 static devclass_t uninorth_devclass; 134 135 DRIVER_MODULE(uninorth, nexus, uninorth_driver, uninorth_devclass, 0, 0); 136 137 static int 138 uninorth_probe(device_t dev) 139 { 140 const char *type, *compatible; 141 142 type = ofw_bus_get_type(dev); 143 compatible = ofw_bus_get_compat(dev); 144 145 if (type == NULL || compatible == NULL) 146 return (ENXIO); 147 148 if (strcmp(type, "pci") != 0) 149 return (ENXIO); 150 151 if (strcmp(compatible, "uni-north") == 0) { 152 device_set_desc(dev, "Apple UniNorth Host-PCI bridge"); 153 return (0); 154 } else if (strcmp(compatible, "u3-agp") == 0) { 155 device_set_desc(dev, "Apple U3 Host-AGP bridge"); 156 return (0); 157 } else if (strcmp(compatible, "u4-pcie") == 0) { 158 device_set_desc(dev, "IBM CPC945 PCI Express Root"); 159 return (0); 160 } 161 162 return (ENXIO); 163 } 164 165 static int 166 uninorth_attach(device_t dev) 167 { 168 struct uninorth_softc *sc; 169 const char *compatible; 170 phandle_t node; 171 u_int32_t reg[3], busrange[2]; 172 struct uninorth_range *rp, *io, *mem[2]; 173 int nmem, i, error; 174 175 node = ofw_bus_get_node(dev); 176 sc = device_get_softc(dev); 177 178 if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8) 179 return (ENXIO); 180 181 if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8) 182 return (ENXIO); 183 184 sc->sc_ver = 0; 185 compatible = ofw_bus_get_compat(dev); 186 if (strcmp(compatible, "u3-agp") == 0) 187 sc->sc_ver = 3; 188 if (strcmp(compatible, "u4-pcie") == 0) 189 sc->sc_ver = 4; 190 191 sc->sc_dev = dev; 192 sc->sc_node = node; 193 if (sc->sc_ver >= 3) { 194 sc->sc_addr = (vm_offset_t)pmap_mapdev(reg[1] + 0x800000, PAGE_SIZE); 195 sc->sc_data = (vm_offset_t)pmap_mapdev(reg[1] + 0xc00000, PAGE_SIZE); 196 } else { 197 sc->sc_addr = (vm_offset_t)pmap_mapdev(reg[0] + 0x800000, PAGE_SIZE); 198 sc->sc_data = (vm_offset_t)pmap_mapdev(reg[0] + 0xc00000, PAGE_SIZE); 199 } 200 sc->sc_bus = busrange[0]; 201 202 bzero(sc->sc_range, sizeof(sc->sc_range)); 203 if (sc->sc_ver >= 3) { 204 /* 205 * On Apple U3 systems, we have an otherwise standard 206 * Uninorth controller driving AGP. The one difference 207 * is that it uses a new PCI ranges format, so do the 208 * translation. 209 */ 210 211 struct uninorth_range64 range64[6]; 212 bzero(range64, sizeof(range64)); 213 214 sc->sc_nrange = OF_getprop(node, "ranges", range64, 215 sizeof(range64)); 216 for (i = 0; range64[i].pci_hi != 0; i++) { 217 sc->sc_range[i].pci_hi = range64[i].pci_hi; 218 sc->sc_range[i].pci_mid = range64[i].pci_mid; 219 sc->sc_range[i].pci_lo = range64[i].pci_lo; 220 sc->sc_range[i].host = range64[i].host_lo; 221 sc->sc_range[i].size_hi = range64[i].size_hi; 222 sc->sc_range[i].size_lo = range64[i].size_lo; 223 } 224 } else { 225 sc->sc_nrange = OF_getprop(node, "ranges", sc->sc_range, 226 sizeof(sc->sc_range)); 227 } 228 229 if (sc->sc_nrange == -1) { 230 device_printf(dev, "could not get ranges\n"); 231 return (ENXIO); 232 } 233 234 sc->sc_nrange /= sizeof(sc->sc_range[0]); 235 236 sc->sc_range[6].pci_hi = 0; 237 io = NULL; 238 nmem = 0; 239 240 for (rp = sc->sc_range; rp < sc->sc_range + sc->sc_nrange && 241 rp->pci_hi != 0; rp++) { 242 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) { 243 case OFW_PCI_PHYS_HI_SPACE_CONFIG: 244 break; 245 case OFW_PCI_PHYS_HI_SPACE_IO: 246 io = rp; 247 break; 248 case OFW_PCI_PHYS_HI_SPACE_MEM32: 249 mem[nmem] = rp; 250 nmem++; 251 break; 252 case OFW_PCI_PHYS_HI_SPACE_MEM64: 253 break; 254 } 255 } 256 257 if (io == NULL) { 258 device_printf(dev, "can't find io range\n"); 259 return (ENXIO); 260 } 261 sc->sc_io_rman.rm_type = RMAN_ARRAY; 262 sc->sc_io_rman.rm_descr = "UniNorth PCI I/O Ports"; 263 sc->sc_iostart = io->host; 264 if (rman_init(&sc->sc_io_rman) != 0 || 265 rman_manage_region(&sc->sc_io_rman, io->pci_lo, 266 io->pci_lo + io->size_lo - 1) != 0) { 267 panic("uninorth_attach: failed to set up I/O rman"); 268 } 269 270 if (nmem == 0) { 271 device_printf(dev, "can't find mem ranges\n"); 272 return (ENXIO); 273 } 274 sc->sc_mem_rman.rm_type = RMAN_ARRAY; 275 sc->sc_mem_rman.rm_descr = "UniNorth PCI Memory"; 276 error = rman_init(&sc->sc_mem_rman); 277 if (error) { 278 device_printf(dev, "rman_init() failed. error = %d\n", error); 279 return (error); 280 } 281 for (i = 0; i < nmem; i++) { 282 error = rman_manage_region(&sc->sc_mem_rman, mem[i]->pci_lo, 283 mem[i]->pci_lo + mem[i]->size_lo - 1); 284 if (error) { 285 device_printf(dev, 286 "rman_manage_region() failed. error = %d\n", error); 287 return (error); 288 } 289 } 290 291 ofw_bus_setup_iinfo(node, &sc->sc_pci_iinfo, sizeof(cell_t)); 292 293 device_add_child(dev, "pci", device_get_unit(dev)); 294 return (bus_generic_attach(dev)); 295 } 296 297 static int 298 uninorth_maxslots(device_t dev) 299 { 300 301 return (PCI_SLOTMAX); 302 } 303 304 static u_int32_t 305 uninorth_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg, 306 int width) 307 { 308 struct uninorth_softc *sc; 309 vm_offset_t caoff; 310 311 sc = device_get_softc(dev); 312 caoff = sc->sc_data + (reg & 0x07); 313 314 if (uninorth_enable_config(sc, bus, slot, func, reg) != 0) { 315 switch (width) { 316 case 1: 317 return (in8rb(caoff)); 318 break; 319 case 2: 320 return (in16rb(caoff)); 321 break; 322 case 4: 323 return (in32rb(caoff)); 324 break; 325 } 326 } 327 328 return (0xffffffff); 329 } 330 331 static void 332 uninorth_write_config(device_t dev, u_int bus, u_int slot, u_int func, 333 u_int reg, u_int32_t val, int width) 334 { 335 struct uninorth_softc *sc; 336 vm_offset_t caoff; 337 338 sc = device_get_softc(dev); 339 caoff = sc->sc_data + (reg & 0x07); 340 341 if (uninorth_enable_config(sc, bus, slot, func, reg)) { 342 switch (width) { 343 case 1: 344 out8rb(caoff, val); 345 break; 346 case 2: 347 out16rb(caoff, val); 348 break; 349 case 4: 350 out32rb(caoff, val); 351 break; 352 } 353 } 354 } 355 356 static int 357 uninorth_route_interrupt(device_t bus, device_t dev, int pin) 358 { 359 struct uninorth_softc *sc; 360 struct ofw_pci_register reg; 361 uint32_t pintr, mintr; 362 phandle_t iparent; 363 uint8_t maskbuf[sizeof(reg) + sizeof(pintr)]; 364 365 sc = device_get_softc(bus); 366 pintr = pin; 367 if (ofw_bus_lookup_imap(ofw_bus_get_node(dev), &sc->sc_pci_iinfo, ®, 368 sizeof(reg), &pintr, sizeof(pintr), &mintr, sizeof(mintr), 369 &iparent, maskbuf)) 370 return (MAP_IRQ(iparent, mintr)); 371 372 /* Maybe it's a real interrupt, not an intpin */ 373 if (pin > 4) 374 return (pin); 375 376 device_printf(bus, "could not route pin %d for device %d.%d\n", 377 pin, pci_get_slot(dev), pci_get_function(dev)); 378 return (PCI_INVALID_IRQ); 379 } 380 381 static int 382 uninorth_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 383 { 384 struct uninorth_softc *sc; 385 386 sc = device_get_softc(dev); 387 388 switch (which) { 389 case PCIB_IVAR_DOMAIN: 390 *result = device_get_unit(dev); 391 return (0); 392 case PCIB_IVAR_BUS: 393 *result = sc->sc_bus; 394 return (0); 395 } 396 397 return (ENOENT); 398 } 399 400 static struct resource * 401 uninorth_alloc_resource(device_t bus, device_t child, int type, int *rid, 402 u_long start, u_long end, u_long count, u_int flags) 403 { 404 struct uninorth_softc *sc; 405 struct resource *rv; 406 struct rman *rm; 407 int needactivate; 408 409 needactivate = flags & RF_ACTIVE; 410 flags &= ~RF_ACTIVE; 411 412 sc = device_get_softc(bus); 413 414 switch (type) { 415 case SYS_RES_MEMORY: 416 rm = &sc->sc_mem_rman; 417 break; 418 419 case SYS_RES_IOPORT: 420 rm = &sc->sc_io_rman; 421 break; 422 423 case SYS_RES_IRQ: 424 return (bus_alloc_resource(bus, type, rid, start, end, count, 425 flags)); 426 427 default: 428 device_printf(bus, "unknown resource request from %s\n", 429 device_get_nameunit(child)); 430 return (NULL); 431 } 432 433 rv = rman_reserve_resource(rm, start, end, count, flags, child); 434 if (rv == NULL) { 435 device_printf(bus, "failed to reserve resource for %s\n", 436 device_get_nameunit(child)); 437 return (NULL); 438 } 439 440 rman_set_rid(rv, *rid); 441 442 if (needactivate) { 443 if (bus_activate_resource(child, type, *rid, rv) != 0) { 444 device_printf(bus, 445 "failed to activate resource for %s\n", 446 device_get_nameunit(child)); 447 rman_release_resource(rv); 448 return (NULL); 449 } 450 } 451 452 return (rv); 453 } 454 455 static int 456 uninorth_activate_resource(device_t bus, device_t child, int type, int rid, 457 struct resource *res) 458 { 459 void *p; 460 struct uninorth_softc *sc; 461 462 sc = device_get_softc(bus); 463 464 if (type == SYS_RES_IRQ) 465 return (bus_activate_resource(bus, type, rid, res)); 466 467 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 468 vm_offset_t start; 469 470 start = (vm_offset_t)rman_get_start(res); 471 /* 472 * For i/o-ports, convert the start address to the 473 * uninorth PCI i/o window 474 */ 475 if (type == SYS_RES_IOPORT) 476 start += sc->sc_iostart; 477 478 if (bootverbose) 479 printf("uninorth mapdev: start %zx, len %ld\n", start, 480 rman_get_size(res)); 481 482 p = pmap_mapdev(start, (vm_size_t)rman_get_size(res)); 483 if (p == NULL) 484 return (ENOMEM); 485 rman_set_virtual(res, p); 486 rman_set_bustag(res, &bs_le_tag); 487 rman_set_bushandle(res, (u_long)p); 488 } 489 490 return (rman_activate_resource(res)); 491 } 492 493 static int 494 uninorth_enable_config(struct uninorth_softc *sc, u_int bus, u_int slot, 495 u_int func, u_int reg) 496 { 497 uint32_t cfgval; 498 uint32_t pass; 499 500 if (resource_int_value(device_get_name(sc->sc_dev), 501 device_get_unit(sc->sc_dev), "skipslot", &pass) == 0) { 502 if (pass == slot) 503 return (0); 504 } 505 506 /* 507 * Issue type 0 configuration space accesses for the root bus. 508 * 509 * NOTE: On U4, issue only type 1 accesses. There is a secret 510 * PCI Express <-> PCI Express bridge not present in the device tree, 511 * and we need to route all of our configuration space through it. 512 */ 513 if (sc->sc_bus == bus && sc->sc_ver < 4) { 514 /* 515 * No slots less than 11 on the primary bus on U3 and lower 516 */ 517 if (slot < 11) 518 return (0); 519 520 cfgval = (1 << slot) | (func << 8) | (reg & 0xfc); 521 } else { 522 cfgval = (bus << 16) | (slot << 11) | (func << 8) | 523 (reg & 0xfc) | 1; 524 } 525 526 /* Set extended register bits on U4 */ 527 if (sc->sc_ver == 4) 528 cfgval |= (reg >> 8) << 28; 529 530 do { 531 out32rb(sc->sc_addr, cfgval); 532 } while (in32rb(sc->sc_addr) != cfgval); 533 534 return (1); 535 } 536 537 static phandle_t 538 uninorth_get_node(device_t bus, device_t dev) 539 { 540 struct uninorth_softc *sc; 541 542 sc = device_get_softc(bus); 543 /* We only have one child, the PCI bus, which needs our own node. */ 544 545 return sc->sc_node; 546 } 547 548