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sys/mips/mediatek/mtk_pcie.c
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1 /*- 2 * Copyright (c) 2016 Stanislav Galabov. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 #include <sys/cdefs.h> 26 __FBSDID("$FreeBSD: releng/12.0/sys/mips/mediatek/mtk_pcie.c 336639 2018-07-23 15:36:55Z avg $"); 27 28 #include <sys/param.h> 29 #include <sys/systm.h> 30 31 #include <sys/bus.h> 32 #include <sys/interrupt.h> 33 #include <sys/malloc.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/rman.h> 37 #include <sys/lock.h> 38 #include <sys/mutex.h> 39 #include <sys/endian.h> 40 41 #include <vm/vm.h> 42 #include <vm/pmap.h> 43 #include <vm/vm_extern.h> 44 45 #include <machine/bus.h> 46 #include <machine/cpu.h> 47 #include <machine/intr.h> 48 #include <machine/pmap.h> 49 50 #include <dev/pci/pcivar.h> 51 #include <dev/pci/pcireg.h> 52 53 #include <dev/pci/pcib_private.h> 54 55 #include <dev/fdt/fdt_common.h> 56 #include <dev/fdt/fdt_clock.h> 57 #include <dev/ofw/openfirm.h> 58 #include <dev/ofw/ofw_bus.h> 59 #include <dev/ofw/ofw_bus_subr.h> 60 61 #include <mips/mediatek/mtk_pcie.h> 62 #include <mips/mediatek/mtk_soc.h> 63 #include <mips/mediatek/mtk_sysctl.h> 64 #include <mips/mediatek/fdt_reset.h> 65 66 #include "ofw_bus_if.h" 67 #include "pcib_if.h" 68 #include "pic_if.h" 69 70 /* 71 * Note: We only support PCIe at the moment. 72 * Most SoCs in the Ralink/Mediatek family that we target actually don't 73 * support PCI anyway, with the notable exceptions being RT3662/RT3883, which 74 * support both PCI and PCIe. If there exists a board based on one of them 75 * which is of interest in the future it shouldn't be too hard to enable PCI 76 * support for it. 77 */ 78 79 /* Chip specific function declarations */ 80 static int mtk_pcie_phy_init(device_t); 81 static int mtk_pcie_phy_start(device_t); 82 static int mtk_pcie_phy_stop(device_t); 83 static int mtk_pcie_phy_mt7621_init(device_t); 84 static int mtk_pcie_phy_mt7628_init(device_t); 85 static int mtk_pcie_phy_mt7620_init(device_t); 86 static int mtk_pcie_phy_rt3883_init(device_t); 87 static void mtk_pcie_phy_setup_slots(device_t); 88 89 /* Generic declarations */ 90 struct mtx mtk_pci_mtx; 91 MTX_SYSINIT(mtk_pci_mtx, &mtk_pci_mtx, "MTK PCIe mutex", MTX_SPIN); 92 93 static int mtk_pci_intr(void *); 94 95 static struct mtk_pci_softc *mt_sc = NULL; 96 97 struct mtk_pci_range { 98 u_long base; 99 u_long len; 100 }; 101 102 #define FDT_RANGES_CELLS ((1 + 2 + 3) * 2) 103 104 static void 105 mtk_pci_range_dump(struct mtk_pci_range *range) 106 { 107 #ifdef DEBUG 108 printf("\n"); 109 printf(" base = 0x%08lx\n", range->base); 110 printf(" len = 0x%08lx\n", range->len); 111 #endif 112 } 113 114 static int 115 mtk_pci_ranges_decode(phandle_t node, struct mtk_pci_range *io_space, 116 struct mtk_pci_range *mem_space) 117 { 118 struct mtk_pci_range *pci_space; 119 pcell_t ranges[FDT_RANGES_CELLS]; 120 pcell_t addr_cells, size_cells, par_addr_cells; 121 pcell_t *rangesptr; 122 pcell_t cell0, cell1, cell2; 123 int tuple_size, tuples, i, rv, len; 124 125 /* 126 * Retrieve 'ranges' property. 127 */ 128 if ((fdt_addrsize_cells(node, &addr_cells, &size_cells)) != 0) 129 return (EINVAL); 130 if (addr_cells != 3 || size_cells != 2) 131 return (ERANGE); 132 133 par_addr_cells = fdt_parent_addr_cells(node); 134 if (par_addr_cells != 1) 135 return (ERANGE); 136 137 len = OF_getproplen(node, "ranges"); 138 if (len > sizeof(ranges)) 139 return (ENOMEM); 140 141 if (OF_getprop(node, "ranges", ranges, sizeof(ranges)) <= 0) 142 return (EINVAL); 143 144 tuple_size = sizeof(pcell_t) * (addr_cells + par_addr_cells + 145 size_cells); 146 tuples = len / tuple_size; 147 148 /* 149 * Initialize the ranges so that we don't have to worry about 150 * having them all defined in the FDT. In particular, it is 151 * perfectly fine not to want I/O space on PCI busses. 152 */ 153 bzero(io_space, sizeof(*io_space)); 154 bzero(mem_space, sizeof(*mem_space)); 155 156 rangesptr = &ranges[0]; 157 for (i = 0; i < tuples; i++) { 158 cell0 = fdt_data_get((void *)rangesptr, 1); 159 rangesptr++; 160 cell1 = fdt_data_get((void *)rangesptr, 1); 161 rangesptr++; 162 cell2 = fdt_data_get((void *)rangesptr, 1); 163 rangesptr++; 164 165 if (cell0 & 0x02000000) { 166 pci_space = mem_space; 167 } else if (cell0 & 0x01000000) { 168 pci_space = io_space; 169 } else { 170 rv = ERANGE; 171 goto out; 172 } 173 174 pci_space->base = fdt_data_get((void *)rangesptr, 175 par_addr_cells); 176 rangesptr += par_addr_cells; 177 178 pci_space->len = fdt_data_get((void *)rangesptr, size_cells); 179 rangesptr += size_cells; 180 } 181 182 rv = 0; 183 out: 184 return (rv); 185 } 186 187 static int 188 mtk_pci_ranges(phandle_t node, struct mtk_pci_range *io_space, 189 struct mtk_pci_range *mem_space) 190 { 191 int err; 192 193 if ((err = mtk_pci_ranges_decode(node, io_space, mem_space)) != 0) { 194 return (err); 195 } 196 197 mtk_pci_range_dump(io_space); 198 mtk_pci_range_dump(mem_space); 199 200 return (0); 201 } 202 203 static struct ofw_compat_data compat_data[] = { 204 { "ralink,rt3883-pci", MTK_SOC_RT3883 }, 205 { "mediatek,mt7620-pci", MTK_SOC_MT7620A }, 206 { "mediatek,mt7628-pci", MTK_SOC_MT7628 }, 207 { "mediatek,mt7621-pci", MTK_SOC_MT7621 }, 208 { NULL, MTK_SOC_UNKNOWN } 209 }; 210 211 static int 212 mtk_pci_probe(device_t dev) 213 { 214 struct mtk_pci_softc *sc = device_get_softc(dev); 215 216 if (!ofw_bus_status_okay(dev)) 217 return (ENXIO); 218 219 sc->socid = ofw_bus_search_compatible(dev, compat_data)->ocd_data; 220 if (sc->socid == MTK_SOC_UNKNOWN) 221 return (ENXIO); 222 223 device_set_desc(dev, "MTK PCIe Controller"); 224 225 return (0); 226 } 227 228 static int 229 mtk_pci_attach(device_t dev) 230 { 231 struct mtk_pci_softc *sc = device_get_softc(dev); 232 struct mtk_pci_range io_space, mem_space; 233 phandle_t node; 234 intptr_t xref; 235 int i, rid; 236 237 sc->sc_dev = dev; 238 mt_sc = sc; 239 sc->addr_mask = 0xffffffff; 240 241 /* Request our memory */ 242 rid = 0; 243 sc->pci_res[0] = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 244 RF_ACTIVE); 245 if (sc->pci_res[0] == NULL) { 246 device_printf(dev, "could not allocate memory resource\n"); 247 return (ENXIO); 248 } 249 250 /* See how many interrupts we need */ 251 if (sc->socid == MTK_SOC_MT7621) 252 sc->sc_num_irq = 3; 253 else { 254 sc->sc_num_irq = 1; 255 sc->pci_res[2] = sc->pci_res[3] = NULL; 256 sc->pci_intrhand[1] = sc->pci_intrhand[2] = NULL; 257 } 258 259 /* Request our interrupts */ 260 for (i = 1; i <= sc->sc_num_irq ; i++) { 261 rid = i - 1; 262 sc->pci_res[i] = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 263 RF_ACTIVE); 264 if (sc->pci_res[i] == NULL) { 265 device_printf(dev, "could not allocate interrupt " 266 "resource %d\n", rid); 267 goto cleanup_res; 268 } 269 } 270 271 /* Parse our PCI 'ranges' property */ 272 node = ofw_bus_get_node(dev); 273 xref = OF_xref_from_node(node); 274 if (mtk_pci_ranges(node, &io_space, &mem_space)) { 275 device_printf(dev, "could not retrieve 'ranges' data\n"); 276 goto cleanup_res; 277 } 278 279 /* Memory, I/O and IRQ resource limits */ 280 sc->sc_io_base = io_space.base; 281 sc->sc_io_size = io_space.len; 282 sc->sc_mem_base = mem_space.base; 283 sc->sc_mem_size = mem_space.len; 284 sc->sc_irq_start = MTK_PCIE0_IRQ; 285 sc->sc_irq_end = MTK_PCIE2_IRQ; 286 287 /* Init resource managers for memory, I/O and IRQ */ 288 sc->sc_mem_rman.rm_type = RMAN_ARRAY; 289 sc->sc_mem_rman.rm_descr = "mtk pcie memory window"; 290 if (rman_init(&sc->sc_mem_rman) != 0 || 291 rman_manage_region(&sc->sc_mem_rman, sc->sc_mem_base, 292 sc->sc_mem_base + sc->sc_mem_size - 1) != 0) { 293 device_printf(dev, "failed to setup memory rman\n"); 294 goto cleanup_res; 295 } 296 297 sc->sc_io_rman.rm_type = RMAN_ARRAY; 298 sc->sc_io_rman.rm_descr = "mtk pcie io window"; 299 if (rman_init(&sc->sc_io_rman) != 0 || 300 rman_manage_region(&sc->sc_io_rman, sc->sc_io_base, 301 sc->sc_io_base + sc->sc_io_size - 1) != 0) { 302 device_printf(dev, "failed to setup io rman\n"); 303 goto cleanup_res; 304 } 305 306 sc->sc_irq_rman.rm_type = RMAN_ARRAY; 307 sc->sc_irq_rman.rm_descr = "mtk pcie irqs"; 308 if (rman_init(&sc->sc_irq_rman) != 0 || 309 rman_manage_region(&sc->sc_irq_rman, sc->sc_irq_start, 310 sc->sc_irq_end) != 0) { 311 device_printf(dev, "failed to setup irq rman\n"); 312 goto cleanup_res; 313 } 314 315 /* Do SoC-specific PCIe initialization */ 316 if (mtk_pcie_phy_init(dev)) { 317 device_printf(dev, "pcie phy init failed\n"); 318 goto cleanup_rman; 319 } 320 321 /* Register ourselves as an interrupt controller */ 322 if (intr_pic_register(dev, xref) == NULL) { 323 device_printf(dev, "could not register PIC\n"); 324 goto cleanup_rman; 325 } 326 327 /* Set up our interrupt handler */ 328 for (i = 1; i <= sc->sc_num_irq; i++) { 329 sc->pci_intrhand[i - 1] = NULL; 330 if (bus_setup_intr(dev, sc->pci_res[i], INTR_TYPE_MISC, 331 mtk_pci_intr, NULL, sc, &sc->pci_intrhand[i - 1])) { 332 device_printf(dev, "could not setup intr handler %d\n", 333 i); 334 goto cleanup; 335 } 336 } 337 338 /* Attach our PCI child so bus enumeration can start */ 339 if (device_add_child(dev, "pci", -1) == NULL) { 340 device_printf(dev, "could not attach pci bus\n"); 341 goto cleanup; 342 } 343 344 /* And finally, attach ourselves to the bus */ 345 if (bus_generic_attach(dev)) { 346 device_printf(dev, "could not attach to bus\n"); 347 goto cleanup; 348 } 349 350 return (0); 351 352 cleanup: 353 #ifdef notyet 354 intr_pic_unregister(dev, xref); 355 #endif 356 for (i = 1; i <= sc->sc_num_irq; i++) { 357 if (sc->pci_intrhand[i - 1] != NULL) 358 bus_teardown_intr(dev, sc->pci_res[i], 359 sc->pci_intrhand[i - 1]); 360 } 361 cleanup_rman: 362 mtk_pcie_phy_stop(dev); 363 rman_fini(&sc->sc_irq_rman); 364 rman_fini(&sc->sc_io_rman); 365 rman_fini(&sc->sc_mem_rman); 366 cleanup_res: 367 mt_sc = NULL; 368 if (sc->pci_res[0] != NULL) 369 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->pci_res[0]); 370 if (sc->pci_res[1] != NULL) 371 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->pci_res[1]); 372 if (sc->pci_res[2] != NULL) 373 bus_release_resource(dev, SYS_RES_IRQ, 1, sc->pci_res[2]); 374 if (sc->pci_res[3] != NULL) 375 bus_release_resource(dev, SYS_RES_IRQ, 2, sc->pci_res[3]); 376 return (ENXIO); 377 } 378 379 static int 380 mtk_pci_read_ivar(device_t dev, device_t child, int which, 381 uintptr_t *result) 382 { 383 struct mtk_pci_softc *sc = device_get_softc(dev); 384 385 switch (which) { 386 case PCIB_IVAR_DOMAIN: 387 *result = device_get_unit(dev); 388 return (0); 389 case PCIB_IVAR_BUS: 390 *result = sc->sc_busno; 391 return (0); 392 } 393 394 return (ENOENT); 395 } 396 397 static int 398 mtk_pci_write_ivar(device_t dev, device_t child, int which, 399 uintptr_t result) 400 { 401 struct mtk_pci_softc *sc = device_get_softc(dev); 402 403 switch (which) { 404 case PCIB_IVAR_BUS: 405 sc->sc_busno = result; 406 return (0); 407 } 408 409 return (ENOENT); 410 } 411 412 static struct resource * 413 mtk_pci_alloc_resource(device_t bus, device_t child, int type, int *rid, 414 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 415 { 416 struct mtk_pci_softc *sc = device_get_softc(bus); 417 struct resource *rv; 418 struct rman *rm; 419 420 switch (type) { 421 case PCI_RES_BUS: 422 return pci_domain_alloc_bus(0, child, rid, start, end, count, 423 flags); 424 case SYS_RES_IRQ: 425 rm = &sc->sc_irq_rman; 426 break; 427 case SYS_RES_IOPORT: 428 rm = &sc->sc_io_rman; 429 break; 430 case SYS_RES_MEMORY: 431 rm = &sc->sc_mem_rman; 432 break; 433 default: 434 return (NULL); 435 } 436 437 rv = rman_reserve_resource(rm, start, end, count, flags, child); 438 439 if (rv == NULL) 440 return (NULL); 441 442 rman_set_rid(rv, *rid); 443 444 if ((flags & RF_ACTIVE) && type != SYS_RES_IRQ) { 445 if (bus_activate_resource(child, type, *rid, rv)) { 446 rman_release_resource(rv); 447 return (NULL); 448 } 449 } 450 451 return (rv); 452 } 453 454 static int 455 mtk_pci_release_resource(device_t bus, device_t child, int type, int rid, 456 struct resource *res) 457 { 458 459 if (type == PCI_RES_BUS) 460 return (pci_domain_release_bus(0, child, rid, res)); 461 462 return (bus_generic_release_resource(bus, child, type, rid, res)); 463 } 464 465 static int 466 mtk_pci_adjust_resource(device_t bus, device_t child, int type, 467 struct resource *res, rman_res_t start, rman_res_t end) 468 { 469 struct mtk_pci_softc *sc = device_get_softc(bus); 470 struct rman *rm; 471 472 switch (type) { 473 case PCI_RES_BUS: 474 return pci_domain_adjust_bus(0, child, res, start, end); 475 case SYS_RES_IRQ: 476 rm = &sc->sc_irq_rman; 477 break; 478 case SYS_RES_IOPORT: 479 rm = &sc->sc_io_rman; 480 break; 481 case SYS_RES_MEMORY: 482 rm = &sc->sc_mem_rman; 483 break; 484 default: 485 rm = NULL; 486 break; 487 } 488 489 if (rm != NULL) 490 return (rman_adjust_resource(res, start, end)); 491 492 return (bus_generic_adjust_resource(bus, child, type, res, start, end)); 493 } 494 495 static inline int 496 mtk_idx_to_irq(int idx) 497 { 498 499 return ((idx == 0) ? MTK_PCIE0_IRQ : 500 (idx == 1) ? MTK_PCIE1_IRQ : 501 (idx == 2) ? MTK_PCIE2_IRQ : -1); 502 } 503 504 static inline int 505 mtk_irq_to_idx(int irq) 506 { 507 508 return ((irq == MTK_PCIE0_IRQ) ? 0 : 509 (irq == MTK_PCIE1_IRQ) ? 1 : 510 (irq == MTK_PCIE2_IRQ) ? 2 : -1); 511 } 512 513 static void 514 mtk_pci_mask_irq(void *source) 515 { 516 MT_WRITE32(mt_sc, MTK_PCI_PCIENA, 517 MT_READ32(mt_sc, MTK_PCI_PCIENA) & ~(1<<((int)source))); 518 } 519 520 static void 521 mtk_pci_unmask_irq(void *source) 522 { 523 524 MT_WRITE32(mt_sc, MTK_PCI_PCIENA, 525 MT_READ32(mt_sc, MTK_PCI_PCIENA) | (1<<((int)source))); 526 } 527 528 static int 529 mtk_pci_setup_intr(device_t bus, device_t child, struct resource *ires, 530 int flags, driver_filter_t *filt, driver_intr_t *handler, 531 void *arg, void **cookiep) 532 { 533 struct mtk_pci_softc *sc = device_get_softc(bus); 534 struct intr_event *event; 535 int irq, error, irqidx; 536 537 irq = rman_get_start(ires); 538 539 if (irq < sc->sc_irq_start || irq > sc->sc_irq_end) 540 return (EINVAL); 541 542 irqidx = irq - sc->sc_irq_start; 543 544 event = sc->sc_eventstab[irqidx]; 545 if (event == NULL) { 546 error = intr_event_create(&event, (void *)irq, 0, irq, 547 mtk_pci_mask_irq, mtk_pci_unmask_irq, NULL, NULL, 548 "pci intr%d:", irq); 549 550 if (error == 0) { 551 sc->sc_eventstab[irqidx] = event; 552 } 553 else { 554 return (error); 555 } 556 } 557 558 intr_event_add_handler(event, device_get_nameunit(child), filt, 559 handler, arg, intr_priority(flags), flags, cookiep); 560 561 mtk_pci_unmask_irq((void*)irq); 562 563 return (0); 564 } 565 566 static int 567 mtk_pci_teardown_intr(device_t dev, device_t child, struct resource *ires, 568 void *cookie) 569 { 570 struct mtk_pci_softc *sc = device_get_softc(dev); 571 int irq, result, irqidx; 572 573 irq = rman_get_start(ires); 574 if (irq < sc->sc_irq_start || irq > sc->sc_irq_end) 575 return (EINVAL); 576 577 irqidx = irq - sc->sc_irq_start; 578 if (sc->sc_eventstab[irqidx] == NULL) 579 panic("Trying to teardown unoccupied IRQ"); 580 581 mtk_pci_mask_irq((void*)irq); 582 583 result = intr_event_remove_handler(cookie); 584 if (!result) 585 sc->sc_eventstab[irqidx] = NULL; 586 587 588 return (result); 589 } 590 591 static inline uint32_t 592 mtk_pci_make_addr(int bus, int slot, int func, int reg) 593 { 594 uint32_t addr; 595 596 addr = ((((reg & 0xf00) >> 8) << 24) | (bus << 16) | (slot << 11) | 597 (func << 8) | (reg & 0xfc) | (1 << 31)); 598 599 return (addr); 600 } 601 602 static int 603 mtk_pci_maxslots(device_t dev) 604 { 605 606 return (PCI_SLOTMAX); 607 } 608 609 static inline int 610 mtk_pci_slot_has_link(device_t dev, int slot) 611 { 612 struct mtk_pci_softc *sc = device_get_softc(dev); 613 614 return !!(sc->pcie_link_status & (1<<slot)); 615 } 616 617 static uint32_t 618 mtk_pci_read_config(device_t dev, u_int bus, u_int slot, u_int func, 619 u_int reg, int bytes) 620 { 621 struct mtk_pci_softc *sc = device_get_softc(dev); 622 uint32_t addr = 0, data = 0; 623 624 /* Return ~0U if slot has no link */ 625 if (bus == 0 && mtk_pci_slot_has_link(dev, slot) == 0) { 626 return (~0U); 627 } 628 629 mtx_lock_spin(&mtk_pci_mtx); 630 addr = mtk_pci_make_addr(bus, slot, func, (reg & ~3)) & sc->addr_mask; 631 MT_WRITE32(sc, MTK_PCI_CFGADDR, addr); 632 switch (bytes % 4) { 633 case 0: 634 data = MT_READ32(sc, MTK_PCI_CFGDATA); 635 break; 636 case 1: 637 data = MT_READ8(sc, MTK_PCI_CFGDATA + (reg & 0x3)); 638 break; 639 case 2: 640 data = MT_READ16(sc, MTK_PCI_CFGDATA + (reg & 0x3)); 641 break; 642 default: 643 panic("%s(): Wrong number of bytes (%d) requested!\n", 644 __FUNCTION__, bytes % 4); 645 } 646 mtx_unlock_spin(&mtk_pci_mtx); 647 648 return (data); 649 } 650 651 static void 652 mtk_pci_write_config(device_t dev, u_int bus, u_int slot, u_int func, 653 u_int reg, uint32_t val, int bytes) 654 { 655 struct mtk_pci_softc *sc = device_get_softc(dev); 656 uint32_t addr = 0, data = val; 657 658 /* Do not write if slot has no link */ 659 if (bus == 0 && mtk_pci_slot_has_link(dev, slot) == 0) 660 return; 661 662 mtx_lock_spin(&mtk_pci_mtx); 663 addr = mtk_pci_make_addr(bus, slot, func, (reg & ~3)) & sc->addr_mask; 664 MT_WRITE32(sc, MTK_PCI_CFGADDR, addr); 665 switch (bytes % 4) { 666 case 0: 667 MT_WRITE32(sc, MTK_PCI_CFGDATA, data); 668 break; 669 case 1: 670 MT_WRITE8(sc, MTK_PCI_CFGDATA + (reg & 0x3), data); 671 break; 672 case 2: 673 MT_WRITE16(sc, MTK_PCI_CFGDATA + (reg & 0x3), data); 674 break; 675 default: 676 panic("%s(): Wrong number of bytes (%d) requested!\n", 677 __FUNCTION__, bytes % 4); 678 } 679 mtx_unlock_spin(&mtk_pci_mtx); 680 } 681 682 static int 683 mtk_pci_route_interrupt(device_t pcib, device_t device, int pin) 684 { 685 int bus, sl, dev; 686 687 bus = pci_get_bus(device); 688 sl = pci_get_slot(device); 689 dev = pci_get_device(device); 690 691 if (bus != 0) 692 panic("Unexpected bus number %d\n", bus); 693 694 /* PCIe only */ 695 switch (sl) { 696 case 0: return MTK_PCIE0_IRQ; 697 case 1: return MTK_PCIE0_IRQ + 1; 698 case 2: return MTK_PCIE0_IRQ + 2; 699 default: return (-1); 700 } 701 702 return (-1); 703 } 704 705 static device_method_t mtk_pci_methods[] = { 706 /* Device interface */ 707 DEVMETHOD(device_probe, mtk_pci_probe), 708 DEVMETHOD(device_attach, mtk_pci_attach), 709 DEVMETHOD(device_shutdown, bus_generic_shutdown), 710 DEVMETHOD(device_suspend, bus_generic_suspend), 711 DEVMETHOD(device_resume, bus_generic_resume), 712 713 /* Bus interface */ 714 DEVMETHOD(bus_read_ivar, mtk_pci_read_ivar), 715 DEVMETHOD(bus_write_ivar, mtk_pci_write_ivar), 716 DEVMETHOD(bus_alloc_resource, mtk_pci_alloc_resource), 717 DEVMETHOD(bus_release_resource, mtk_pci_release_resource), 718 DEVMETHOD(bus_adjust_resource, mtk_pci_adjust_resource), 719 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 720 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 721 DEVMETHOD(bus_setup_intr, mtk_pci_setup_intr), 722 DEVMETHOD(bus_teardown_intr, mtk_pci_teardown_intr), 723 724 /* pcib interface */ 725 DEVMETHOD(pcib_maxslots, mtk_pci_maxslots), 726 DEVMETHOD(pcib_read_config, mtk_pci_read_config), 727 DEVMETHOD(pcib_write_config, mtk_pci_write_config), 728 DEVMETHOD(pcib_route_interrupt, mtk_pci_route_interrupt), 729 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow), 730 731 /* OFW bus interface */ 732 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 733 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 734 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 735 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 736 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 737 738 DEVMETHOD_END 739 }; 740 741 static driver_t mtk_pci_driver = { 742 "pcib", 743 mtk_pci_methods, 744 sizeof(struct mtk_pci_softc), 745 }; 746 747 static devclass_t mtk_pci_devclass; 748 749 DRIVER_MODULE(mtk_pci, simplebus, mtk_pci_driver, mtk_pci_devclass, 0, 0); 750 751 /* Our interrupt handler */ 752 static int 753 mtk_pci_intr(void *arg) 754 { 755 struct mtk_pci_softc *sc = arg; 756 struct intr_event *event; 757 uint32_t reg, irq, irqidx; 758 759 reg = MT_READ32(sc, MTK_PCI_PCIINT); 760 761 for (irq = sc->sc_irq_start; irq <= sc->sc_irq_end; irq++) { 762 if (reg & (1u<<irq)) { 763 irqidx = irq - sc->sc_irq_start; 764 event = sc->sc_eventstab[irqidx]; 765 if (!event || CK_SLIST_EMPTY(&event->ie_handlers)) { 766 if (irq != 0) 767 printf("Stray PCI IRQ %d\n", irq); 768 continue; 769 } 770 771 intr_event_handle(event, NULL); 772 } 773 } 774 775 return (FILTER_HANDLED); 776 } 777 778 /* PCIe SoC-specific initialization */ 779 static int 780 mtk_pcie_phy_init(device_t dev) 781 { 782 struct mtk_pci_softc *sc; 783 784 /* Get our softc */ 785 sc = device_get_softc(dev); 786 787 /* We don't know how many slots we have yet */ 788 sc->num_slots = 0; 789 790 /* Handle SoC specific PCIe init */ 791 switch (sc->socid) { 792 case MTK_SOC_MT7628: /* Fallthrough */ 793 case MTK_SOC_MT7688: 794 if (mtk_pcie_phy_mt7628_init(dev)) 795 return (ENXIO); 796 break; 797 case MTK_SOC_MT7621: 798 if (mtk_pcie_phy_mt7621_init(dev)) 799 return (ENXIO); 800 break; 801 case MTK_SOC_MT7620A: 802 if (mtk_pcie_phy_mt7620_init(dev)) 803 return (ENXIO); 804 break; 805 case MTK_SOC_RT3662: /* Fallthrough */ 806 case MTK_SOC_RT3883: 807 if (mtk_pcie_phy_rt3883_init(dev)) 808 return (ENXIO); 809 break; 810 default: 811 device_printf(dev, "unsupported device %x\n", sc->socid); 812 return (ENXIO); 813 } 814 815 /* 816 * If we were successful so far go and set up the PCIe slots, so we 817 * may allocate mem/io/irq resources and enumerate busses later. 818 */ 819 mtk_pcie_phy_setup_slots(dev); 820 821 return (0); 822 } 823 824 static int 825 mtk_pcie_phy_start(device_t dev) 826 { 827 struct mtk_pci_softc *sc = device_get_softc(dev); 828 829 if (sc->socid == MTK_SOC_MT7621 && 830 (mtk_sysctl_get(SYSCTL_REVID) & SYSCTL_REVID_MASK) != 831 SYSCTL_MT7621_REV_E) { 832 if (fdt_reset_assert_all(dev)) 833 return (ENXIO); 834 } else { 835 if (fdt_reset_deassert_all(dev)) 836 return (ENXIO); 837 } 838 839 if (fdt_clock_enable_all(dev)) 840 return (ENXIO); 841 842 return (0); 843 } 844 845 static int 846 mtk_pcie_phy_stop(device_t dev) 847 { 848 struct mtk_pci_softc *sc = device_get_softc(dev); 849 850 if (sc->socid == MTK_SOC_MT7621 && 851 (mtk_sysctl_get(SYSCTL_REVID) & SYSCTL_REVID_MASK) != 852 SYSCTL_MT7621_REV_E) { 853 if (fdt_reset_deassert_all(dev)) 854 return (ENXIO); 855 } else { 856 if (fdt_reset_assert_all(dev)) 857 return (ENXIO); 858 } 859 860 if (fdt_clock_disable_all(dev)) 861 return (ENXIO); 862 863 return (0); 864 } 865 866 #define mtk_pcie_phy_set(_sc, _reg, _s, _n, _v) \ 867 MT_WRITE32((_sc), (_reg), ((MT_READ32((_sc), (_reg)) & \ 868 (~(((1ull << (_n)) - 1) << (_s)))) | ((_v) << (_s)))) 869 870 static void 871 mtk_pcie_phy_mt7621_bypass_pipe_rst(struct mtk_pci_softc *sc, uint32_t off) 872 { 873 874 mtk_pcie_phy_set(sc, off + 0x002c, 12, 1, 1); 875 mtk_pcie_phy_set(sc, off + 0x002c, 4, 1, 1); 876 mtk_pcie_phy_set(sc, off + 0x012c, 12, 1, 1); 877 mtk_pcie_phy_set(sc, off + 0x012c, 4, 1, 1); 878 mtk_pcie_phy_set(sc, off + 0x102c, 12, 1, 1); 879 mtk_pcie_phy_set(sc, off + 0x102c, 4, 1, 1); 880 } 881 882 static void 883 mtk_pcie_phy_mt7621_setup_ssc(struct mtk_pci_softc *sc, uint32_t off) 884 { 885 uint32_t xtal_sel; 886 887 xtal_sel = mtk_sysctl_get(SYSCTL_SYSCFG) >> 6; 888 xtal_sel &= 0x7; 889 890 mtk_pcie_phy_set(sc, off + 0x400, 8, 1, 1); 891 mtk_pcie_phy_set(sc, off + 0x400, 9, 2, 0); 892 mtk_pcie_phy_set(sc, off + 0x000, 4, 1, 1); 893 mtk_pcie_phy_set(sc, off + 0x100, 4, 1, 1); 894 mtk_pcie_phy_set(sc, off + 0x000, 5, 1, 0); 895 mtk_pcie_phy_set(sc, off + 0x100, 5, 1, 0); 896 897 if (xtal_sel <= 5 && xtal_sel >= 3) { 898 mtk_pcie_phy_set(sc, off + 0x490, 6, 2, 1); 899 mtk_pcie_phy_set(sc, off + 0x4a8, 0, 12, 0x1a); 900 mtk_pcie_phy_set(sc, off + 0x4a8, 16, 12, 0x1a); 901 } else { 902 mtk_pcie_phy_set(sc, off + 0x490, 6, 2, 0); 903 if (xtal_sel >= 6) { 904 mtk_pcie_phy_set(sc, off + 0x4bc, 4, 2, 0x01); 905 mtk_pcie_phy_set(sc, off + 0x49c, 0, 31, 0x18000000); 906 mtk_pcie_phy_set(sc, off + 0x4a4, 0, 16, 0x18d); 907 mtk_pcie_phy_set(sc, off + 0x4a8, 0, 12, 0x4a); 908 mtk_pcie_phy_set(sc, off + 0x4a8, 16, 12, 0x4a); 909 mtk_pcie_phy_set(sc, off + 0x4a8, 0, 12, 0x11); 910 mtk_pcie_phy_set(sc, off + 0x4a8, 16, 12, 0x11); 911 } else { 912 mtk_pcie_phy_set(sc, off + 0x4a8, 0, 12, 0x1a); 913 mtk_pcie_phy_set(sc, off + 0x4a8, 16, 12, 0x1a); 914 } 915 } 916 917 mtk_pcie_phy_set(sc, off + 0x4a0, 5, 1, 1); 918 mtk_pcie_phy_set(sc, off + 0x490, 22, 2, 2); 919 mtk_pcie_phy_set(sc, off + 0x490, 18, 4, 6); 920 mtk_pcie_phy_set(sc, off + 0x490, 12, 4, 2); 921 mtk_pcie_phy_set(sc, off + 0x490, 8, 4, 1); 922 mtk_pcie_phy_set(sc, off + 0x4ac, 16, 3, 0); 923 mtk_pcie_phy_set(sc, off + 0x490, 1, 3, 2); 924 925 if (xtal_sel <= 5 && xtal_sel >= 3) { 926 mtk_pcie_phy_set(sc, off + 0x414, 6, 2, 1); 927 mtk_pcie_phy_set(sc, off + 0x414, 5, 1, 1); 928 } 929 930 mtk_pcie_phy_set(sc, off + 0x414, 28, 2, 1); 931 mtk_pcie_phy_set(sc, off + 0x040, 17, 4, 7); 932 mtk_pcie_phy_set(sc, off + 0x040, 16, 1, 1); 933 mtk_pcie_phy_set(sc, off + 0x140, 17, 4, 7); 934 mtk_pcie_phy_set(sc, off + 0x140, 16, 1, 1); 935 936 mtk_pcie_phy_set(sc, off + 0x000, 5, 1, 1); 937 mtk_pcie_phy_set(sc, off + 0x100, 5, 1, 1); 938 mtk_pcie_phy_set(sc, off + 0x000, 4, 1, 0); 939 mtk_pcie_phy_set(sc, off + 0x100, 4, 1, 0); 940 } 941 942 /* XXX: ugly, we need to fix this at some point */ 943 #define MT7621_GPIO_CTRL0 *((volatile uint32_t *)0xbe000600) 944 #define MT7621_GPIO_DATA0 *((volatile uint32_t *)0xbe000620) 945 946 #define mtk_gpio_clr_set(_reg, _clr, _set) \ 947 do { \ 948 (_reg) = ((_reg) & (_clr)) | (_set); \ 949 } while (0) 950 951 static int 952 mtk_pcie_phy_mt7621_init(device_t dev) 953 { 954 struct mtk_pci_softc *sc = device_get_softc(dev); 955 956 /* First off, stop the PHY */ 957 if (mtk_pcie_phy_stop(dev)) 958 return (ENXIO); 959 960 /* PCIe resets are GPIO pins */ 961 mtk_sysctl_clr_set(SYSCTL_GPIOMODE, MT7621_PERST_GPIO_MODE | 962 MT7621_UARTL3_GPIO_MODE, MT7621_PERST_GPIO | MT7621_UARTL3_GPIO); 963 964 /* Set GPIO pins as outputs */ 965 mtk_gpio_clr_set(MT7621_GPIO_CTRL0, 0, MT7621_PCIE_RST); 966 967 /* Assert resets to PCIe devices */ 968 mtk_gpio_clr_set(MT7621_GPIO_DATA0, MT7621_PCIE_RST, 0); 969 970 /* Give everything a chance to sink in */ 971 DELAY(100000); 972 973 /* Now start the PHY again */ 974 if (mtk_pcie_phy_start(dev)) 975 return (ENXIO); 976 977 /* Wait for things to settle */ 978 DELAY(100000); 979 980 /* Only apply below to REV-E hardware */ 981 if ((mtk_sysctl_get(SYSCTL_REVID) & SYSCTL_REVID_MASK) == 982 SYSCTL_MT7621_REV_E) 983 mtk_pcie_phy_mt7621_bypass_pipe_rst(sc, 0x9000); 984 985 /* Setup PCIe ports 0 and 1 */ 986 mtk_pcie_phy_mt7621_setup_ssc(sc, 0x9000); 987 /* Setup PCIe port 2 */ 988 mtk_pcie_phy_mt7621_setup_ssc(sc, 0xa000); 989 990 /* Deassert resets to PCIe devices */ 991 mtk_gpio_clr_set(MT7621_GPIO_DATA0, 0, MT7621_PCIE_RST); 992 993 /* Set number of slots supported */ 994 sc->num_slots = 3; 995 996 /* Give it a chance to sink in */ 997 DELAY(100000); 998 999 return (0); 1000 } 1001 1002 static void 1003 mtk_pcie_phy_mt7628_setup(struct mtk_pci_softc *sc, uint32_t off) 1004 { 1005 uint32_t xtal_sel; 1006 1007 xtal_sel = mtk_sysctl_get(SYSCTL_SYSCFG) >> 6; 1008 xtal_sel &= 0x1; 1009 1010 mtk_pcie_phy_set(sc, off + 0x400, 8, 1, 1); 1011 mtk_pcie_phy_set(sc, off + 0x400, 9, 2, 0); 1012 mtk_pcie_phy_set(sc, off + 0x000, 4, 1, 1); 1013 mtk_pcie_phy_set(sc, off + 0x000, 5, 1, 0); 1014 mtk_pcie_phy_set(sc, off + 0x4ac, 16, 3, 3); 1015 1016 if (xtal_sel == 1) { 1017 mtk_pcie_phy_set(sc, off + 0x4bc, 24, 8, 0x7d); 1018 mtk_pcie_phy_set(sc, off + 0x490, 12, 4, 0x08); 1019 mtk_pcie_phy_set(sc, off + 0x490, 6, 2, 0x01); 1020 mtk_pcie_phy_set(sc, off + 0x4c0, 0, 32, 0x1f400000); 1021 mtk_pcie_phy_set(sc, off + 0x4a4, 0, 16, 0x013d); 1022 mtk_pcie_phy_set(sc, off + 0x4a8, 16, 16, 0x74); 1023 mtk_pcie_phy_set(sc, off + 0x4a8, 0, 16, 0x74); 1024 } else { 1025 mtk_pcie_phy_set(sc, off + 0x4bc, 24, 8, 0x64); 1026 mtk_pcie_phy_set(sc, off + 0x490, 12, 4, 0x0a); 1027 mtk_pcie_phy_set(sc, off + 0x490, 6, 2, 0x00); 1028 mtk_pcie_phy_set(sc, off + 0x4c0, 0, 32, 0x19000000); 1029 mtk_pcie_phy_set(sc, off + 0x4a4, 0, 16, 0x018d); 1030 mtk_pcie_phy_set(sc, off + 0x4a8, 16, 16, 0x4a); 1031 mtk_pcie_phy_set(sc, off + 0x4a8, 0, 16, 0x4a); 1032 } 1033 1034 mtk_pcie_phy_set(sc, off + 0x498, 0, 8, 5); 1035 mtk_pcie_phy_set(sc, off + 0x000, 5, 1, 1); 1036 mtk_pcie_phy_set(sc, off + 0x000, 4, 1, 0); 1037 } 1038 1039 static int 1040 mtk_pcie_phy_mt7628_init(device_t dev) 1041 { 1042 struct mtk_pci_softc *sc = device_get_softc(dev); 1043 1044 /* Set PCIe reset to normal mode */ 1045 mtk_sysctl_clr_set(SYSCTL_GPIOMODE, MT7628_PERST_GPIO_MODE, 1046 MT7628_PERST); 1047 1048 /* Start the PHY */ 1049 if (mtk_pcie_phy_start(dev)) 1050 return (ENXIO); 1051 1052 /* Give it a chance to sink in */ 1053 DELAY(100000); 1054 1055 /* Setup the PHY */ 1056 mtk_pcie_phy_mt7628_setup(sc, 0x9000); 1057 1058 /* Deassert PCIe device reset */ 1059 MT_CLR_SET32(sc, MTK_PCI_PCICFG, MTK_PCI_RESET, 0); 1060 1061 /* Set number of slots supported */ 1062 sc->num_slots = 1; 1063 1064 return (0); 1065 } 1066 1067 static int 1068 mtk_pcie_phy_mt7620_wait_busy(struct mtk_pci_softc *sc) 1069 { 1070 uint32_t reg_value, retry; 1071 1072 reg_value = retry = 0; 1073 1074 while (retry++ < MT7620_MAX_RETRIES) { 1075 reg_value = MT_READ32(sc, MT7620_PCIE_PHY_CFG); 1076 if (reg_value & PHY_BUSY) 1077 DELAY(100000); 1078 else 1079 break; 1080 } 1081 1082 if (retry >= MT7620_MAX_RETRIES) 1083 return (ENXIO); 1084 1085 return (0); 1086 } 1087 1088 static int 1089 mtk_pcie_phy_mt7620_set(struct mtk_pci_softc *sc, uint32_t reg, 1090 uint32_t val) 1091 { 1092 uint32_t reg_val; 1093 1094 if (mtk_pcie_phy_mt7620_wait_busy(sc)) 1095 return (ENXIO); 1096 1097 reg_val = PHY_MODE_WRITE | ((reg & 0xff) << PHY_ADDR_OFFSET) | 1098 (val & 0xff); 1099 MT_WRITE32(sc, MT7620_PCIE_PHY_CFG, reg_val); 1100 DELAY(1000); 1101 1102 if (mtk_pcie_phy_mt7620_wait_busy(sc)) 1103 return (ENXIO); 1104 1105 return (0); 1106 } 1107 1108 static int 1109 mtk_pcie_phy_mt7620_init(device_t dev) 1110 { 1111 struct mtk_pci_softc *sc = device_get_softc(dev); 1112 1113 /* 1114 * The below sets the PCIe PHY to bypass the PCIe DLL and enables 1115 * "elastic buffer control", whatever that may be... 1116 */ 1117 if (mtk_pcie_phy_mt7620_set(sc, 0x00, 0x80) || 1118 mtk_pcie_phy_mt7620_set(sc, 0x01, 0x04) || 1119 mtk_pcie_phy_mt7620_set(sc, 0x68, 0x84)) 1120 return (ENXIO); 1121 1122 /* Stop PCIe */ 1123 if (mtk_pcie_phy_stop(dev)) 1124 return (ENXIO); 1125 1126 /* Restore PPLL to a sane state before going on */ 1127 mtk_sysctl_clr_set(MT7620_PPLL_DRV, LC_CKDRVPD, PDRV_SW_SET); 1128 1129 /* No PCIe on the MT7620N */ 1130 if (!(mtk_sysctl_get(SYSCTL_REVID) & MT7620_PKG_BGA)) { 1131 device_printf(dev, "PCIe disabled for MT7620N\n"); 1132 mtk_sysctl_clr_set(MT7620_PPLL_CFG0, 0, PPLL_SW_SET); 1133 mtk_sysctl_clr_set(MT7620_PPLL_CFG1, 0, PPLL_PD); 1134 return (ENXIO); 1135 } 1136 1137 /* PCIe device reset pin is in normal mode */ 1138 mtk_sysctl_clr_set(SYSCTL_GPIOMODE, MT7620_PERST_GPIO_MODE, 1139 MT7620_PERST); 1140 1141 /* Enable PCIe now */ 1142 if (mtk_pcie_phy_start(dev)) 1143 return (ENXIO); 1144 1145 /* Give it a chance to sink in */ 1146 DELAY(100000); 1147 1148 /* If PLL is not locked - bail */ 1149 if (!(mtk_sysctl_get(MT7620_PPLL_CFG1) & PPLL_LOCKED)) { 1150 device_printf(dev, "no PPLL not lock\n"); 1151 mtk_pcie_phy_stop(dev); 1152 return (ENXIO); 1153 } 1154 1155 /* Configure PCIe PLL */ 1156 mtk_sysctl_clr_set(MT7620_PPLL_DRV, LC_CKDRVOHZ | LC_CKDRVHZ, 1157 LC_CKDRVPD | PDRV_SW_SET); 1158 1159 /* and give it a chance to settle */ 1160 DELAY(100000); 1161 1162 /* Deassert PCIe device reset */ 1163 MT_CLR_SET32(sc, MTK_PCI_PCICFG, MTK_PCI_RESET, 0); 1164 1165 /* MT7620 supports one PCIe slot */ 1166 sc->num_slots = 1; 1167 1168 return (0); 1169 } 1170 1171 static int 1172 mtk_pcie_phy_rt3883_init(device_t dev) 1173 { 1174 struct mtk_pci_softc *sc = device_get_softc(dev); 1175 1176 /* Enable PCI host mode and PCIe RC mode */ 1177 mtk_sysctl_clr_set(SYSCTL_SYSCFG1, 0, RT3883_PCI_HOST_MODE | 1178 RT3883_PCIE_RC_MODE); 1179 1180 /* Enable PCIe PHY */ 1181 if (mtk_pcie_phy_start(dev)) 1182 return (ENXIO); 1183 1184 /* Disable PCI, we only support PCIe for now */ 1185 mtk_sysctl_clr_set(SYSCTL_RSTCTRL, 0, RT3883_PCI_RST); 1186 mtk_sysctl_clr_set(SYSCTL_CLKCFG1, RT3883_PCI_CLK, 0); 1187 1188 /* Give things a chance to sink in */ 1189 DELAY(500000); 1190 1191 /* Set PCIe port number to 0 and lift PCIe reset */ 1192 MT_WRITE32(sc, MTK_PCI_PCICFG, 0); 1193 1194 /* Configure PCI Arbiter */ 1195 MT_WRITE32(sc, MTK_PCI_ARBCTL, 0x79); 1196 1197 /* We have a single PCIe slot */ 1198 sc->num_slots = 1; 1199 1200 return (0); 1201 } 1202 1203 static void 1204 mtk_pcie_phy_setup_slots(device_t dev) 1205 { 1206 struct mtk_pci_softc *sc = device_get_softc(dev); 1207 uint32_t bar0_val, val; 1208 int i; 1209 1210 /* Disable all PCIe interrupts */ 1211 MT_WRITE32(sc, MTK_PCI_PCIENA, 0); 1212 1213 /* Default bar0_val is 64M, enabled */ 1214 bar0_val = 0x03FF0001; 1215 1216 /* But we override it to 2G, enabled for some SoCs */ 1217 if (sc->socid == MTK_SOC_MT7620A || sc->socid == MTK_SOC_MT7628 || 1218 sc->socid == MTK_SOC_MT7688 || sc->socid == MTK_SOC_MT7621) 1219 bar0_val = 0x7FFF0001; 1220 1221 /* We still don't know which slots have linked up */ 1222 sc->pcie_link_status = 0; 1223 1224 /* XXX: I am not sure if this delay is really necessary */ 1225 DELAY(500000); 1226 1227 /* 1228 * See which slots have links and mark them. 1229 * Set up all slots' BARs and make them look like PCIe bridges. 1230 */ 1231 for (i = 0; i < sc->num_slots; i++) { 1232 /* If slot has link - mark it */ 1233 if (MT_READ32(sc, MTK_PCIE_STATUS(i)) & 1) 1234 sc->pcie_link_status |= (1<<i); 1235 else 1236 continue; 1237 1238 /* Generic slot configuration follows */ 1239 1240 /* We enable BAR0 */ 1241 MT_WRITE32(sc, MTK_PCIE_BAR0SETUP(i), bar0_val); 1242 /* and disable BAR1 */ 1243 MT_WRITE32(sc, MTK_PCIE_BAR1SETUP(i), 0); 1244 /* Internal memory base has no offset */ 1245 MT_WRITE32(sc, MTK_PCIE_IMBASEBAR0(i), 0); 1246 /* We're a PCIe bridge */ 1247 MT_WRITE32(sc, MTK_PCIE_CLASS(i), 0x06040001); 1248 1249 val = mtk_pci_read_config(dev, 0, i, 0, 0x4, 4); 1250 mtk_pci_write_config(dev, 0, i, 0, 0x4, val | 0x4, 4); 1251 val = mtk_pci_read_config(dev, 0, i, 0, 0x70c, 4); 1252 val &= ~(0xff << 8); 1253 val |= (0x50 << 8); 1254 mtk_pci_write_config(dev, 0, i, 0, 0x70c, val, 4); 1255 1256 mtk_pci_write_config(dev, 0, i, 0, PCIR_IOBASEL_1, 0xff, 1); 1257 mtk_pci_write_config(dev, 0, i, 0, PCIR_IOBASEH_1, 0xffff, 2); 1258 mtk_pci_write_config(dev, 0, i, 0, PCIR_IOLIMITL_1, 0, 1); 1259 mtk_pci_write_config(dev, 0, i, 0, PCIR_IOLIMITH_1, 0, 2); 1260 mtk_pci_write_config(dev, 0, i, 0, PCIR_MEMBASE_1, 0xffff, 2); 1261 mtk_pci_write_config(dev, 0, i, 0, PCIR_MEMLIMIT_1, 0, 2); 1262 mtk_pci_write_config(dev, 0, i, 0, PCIR_PMBASEL_1, 0xffff, 2); 1263 mtk_pci_write_config(dev, 0, i, 0, PCIR_PMBASEH_1, 0xffffffff, 1264 4); 1265 mtk_pci_write_config(dev, 0, i, 0, PCIR_PMLIMITL_1, 0, 2); 1266 mtk_pci_write_config(dev, 0, i, 0, PCIR_PMLIMITH_1, 0, 4); 1267 } 1268 }
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