1 /* 2 * PCI / PCI-X / PCI-Express support for 4xx parts 3 * 4 * Copyright 2007 Ben. Herrenschmidt <benh@kernel.crashing.org>, IBM Corp. 5 * 6 * Most PCI Express code is coming from Stefan Roese implementation for 7 * arch/ppc in the Denx tree, slightly reworked by me. 8 * 9 * Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de> 10 * 11 * Some of that comes itself from a previous implementation for 440SPE only 12 * by Roland Dreier: 13 * 14 * Copyright (c) 2005 Cisco Systems. All rights reserved. 15 * Roland Dreier <rolandd@cisco.com> 16 * 17 */ 18 19 #undef DEBUG 20 21 #include <linux/kernel.h> 22 #include <linux/pci.h> 23 #include <linux/init.h> 24 #include <linux/of.h> 25 #include <linux/of_address.h> 26 #include <linux/delay.h> 27 #include <linux/slab.h> 28 29 #include <asm/io.h> 30 #include <asm/pci-bridge.h> 31 #include <asm/machdep.h> 32 #include <asm/dcr.h> 33 #include <asm/dcr-regs.h> 34 #include <mm/mmu_decl.h> 35 36 #include "pci.h" 37 38 static int dma_offset_set; 39 40 #define U64_TO_U32_LOW(val) ((u32)((val) & 0x00000000ffffffffULL)) 41 #define U64_TO_U32_HIGH(val) ((u32)((val) >> 32)) 42 43 #define RES_TO_U32_LOW(val) \ 44 ((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_LOW(val) : (val)) 45 #define RES_TO_U32_HIGH(val) \ 46 ((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_HIGH(val) : (0)) 47 48 static inline int ppc440spe_revA(void) 49 { 50 /* Catch both 440SPe variants, with and without RAID6 support */ 51 if ((mfspr(SPRN_PVR) & 0xffefffff) == 0x53421890) 52 return 1; 53 else 54 return 0; 55 } 56 57 static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev) 58 { 59 struct pci_controller *hose; 60 struct resource *r; 61 62 if (dev->devfn != 0 || dev->bus->self != NULL) 63 return; 64 65 hose = pci_bus_to_host(dev->bus); 66 if (hose == NULL) 67 return; 68 69 if (!of_device_is_compatible(hose->dn, "ibm,plb-pciex") && 70 !of_device_is_compatible(hose->dn, "ibm,plb-pcix") && 71 !of_device_is_compatible(hose->dn, "ibm,plb-pci")) 72 return; 73 74 if (of_device_is_compatible(hose->dn, "ibm,plb440epx-pci") || 75 of_device_is_compatible(hose->dn, "ibm,plb440grx-pci")) { 76 hose->indirect_type |= PPC_INDIRECT_TYPE_BROKEN_MRM; 77 } 78 79 /* Hide the PCI host BARs from the kernel as their content doesn't 80 * fit well in the resource management 81 */ 82 pci_dev_for_each_resource(dev, r) { 83 r->start = r->end = 0; 84 r->flags = 0; 85 } 86 87 printk(KERN_INFO "PCI: Hiding 4xx host bridge resources %s\n", 88 pci_name(dev)); 89 } 90 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, fixup_ppc4xx_pci_bridge); 91 92 static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose, 93 void __iomem *reg, 94 struct resource *res) 95 { 96 u64 size; 97 struct of_range_parser parser; 98 struct of_range range; 99 100 /* Default */ 101 res->start = 0; 102 size = 0x80000000; 103 res->end = size - 1; 104 res->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH; 105 106 if (of_pci_dma_range_parser_init(&parser, hose->dn)) 107 goto out; 108 109 for_each_of_range(&parser, &range) { 110 u32 pci_space = range.flags; 111 u64 pci_addr = range.bus_addr; 112 u64 cpu_addr = range.cpu_addr; 113 size = range.size; 114 115 if (cpu_addr == OF_BAD_ADDR || size == 0) 116 continue; 117 118 /* We only care about memory */ 119 if ((pci_space & 0x03000000) != 0x02000000) 120 continue; 121 122 /* We currently only support memory at 0, and pci_addr 123 * within 32 bits space 124 */ 125 if (cpu_addr != 0 || pci_addr > 0xffffffff) { 126 printk(KERN_WARNING "%pOF: Ignored unsupported dma range" 127 " 0x%016llx...0x%016llx -> 0x%016llx\n", 128 hose->dn, 129 pci_addr, pci_addr + size - 1, cpu_addr); 130 continue; 131 } 132 133 /* Check if not prefetchable */ 134 if (!(pci_space & 0x40000000)) 135 res->flags &= ~IORESOURCE_PREFETCH; 136 137 138 /* Use that */ 139 res->start = pci_addr; 140 /* Beware of 32 bits resources */ 141 if (sizeof(resource_size_t) == sizeof(u32) && 142 (pci_addr + size) > 0x100000000ull) 143 res->end = 0xffffffff; 144 else 145 res->end = res->start + size - 1; 146 break; 147 } 148 149 /* We only support one global DMA offset */ 150 if (dma_offset_set && pci_dram_offset != res->start) { 151 printk(KERN_ERR "%pOF: dma-ranges(s) mismatch\n", hose->dn); 152 return -ENXIO; 153 } 154 155 /* Check that we can fit all of memory as we don't support 156 * DMA bounce buffers 157 */ 158 if (size < total_memory) { 159 printk(KERN_ERR "%pOF: dma-ranges too small " 160 "(size=%llx total_memory=%llx)\n", 161 hose->dn, size, (u64)total_memory); 162 return -ENXIO; 163 } 164 165 /* Check we are a power of 2 size and that base is a multiple of size*/ 166 if ((size & (size - 1)) != 0 || 167 (res->start & (size - 1)) != 0) { 168 printk(KERN_ERR "%pOF: dma-ranges unaligned\n", hose->dn); 169 return -ENXIO; 170 } 171 172 /* Check that we are fully contained within 32 bits space if we are not 173 * running on a 460sx or 476fpe which have 64 bit bus addresses. 174 */ 175 if (res->end > 0xffffffff && 176 !(of_device_is_compatible(hose->dn, "ibm,plb-pciex-460sx") 177 || of_device_is_compatible(hose->dn, "ibm,plb-pciex-476fpe"))) { 178 printk(KERN_ERR "%pOF: dma-ranges outside of 32 bits space\n", 179 hose->dn); 180 return -ENXIO; 181 } 182 out: 183 dma_offset_set = 1; 184 pci_dram_offset = res->start; 185 hose->dma_window_base_cur = res->start; 186 hose->dma_window_size = resource_size(res); 187 188 printk(KERN_INFO "4xx PCI DMA offset set to 0x%08lx\n", 189 pci_dram_offset); 190 printk(KERN_INFO "4xx PCI DMA window base to 0x%016llx\n", 191 (unsigned long long)hose->dma_window_base_cur); 192 printk(KERN_INFO "DMA window size 0x%016llx\n", 193 (unsigned long long)hose->dma_window_size); 194 return 0; 195 } 196 197 /* 198 * 4xx PCI 2.x part 199 */ 200 201 static int __init ppc4xx_setup_one_pci_PMM(struct pci_controller *hose, 202 void __iomem *reg, 203 u64 plb_addr, 204 u64 pci_addr, 205 u64 size, 206 unsigned int flags, 207 int index) 208 { 209 u32 ma, pcila, pciha; 210 211 /* Hack warning ! The "old" PCI 2.x cell only let us configure the low 212 * 32-bit of incoming PLB addresses. The top 4 bits of the 36-bit 213 * address are actually hard wired to a value that appears to depend 214 * on the specific SoC. For example, it's 0 on 440EP and 1 on 440EPx. 215 * 216 * The trick here is we just crop those top bits and ignore them when 217 * programming the chip. That means the device-tree has to be right 218 * for the specific part used (we don't print a warning if it's wrong 219 * but on the other hand, you'll crash quickly enough), but at least 220 * this code should work whatever the hard coded value is 221 */ 222 plb_addr &= 0xffffffffull; 223 224 /* Note: Due to the above hack, the test below doesn't actually test 225 * if you address is above 4G, but it tests that address and 226 * (address + size) are both contained in the same 4G 227 */ 228 if ((plb_addr + size) > 0xffffffffull || !is_power_of_2(size) || 229 size < 0x1000 || (plb_addr & (size - 1)) != 0) { 230 printk(KERN_WARNING "%pOF: Resource out of range\n", hose->dn); 231 return -1; 232 } 233 ma = (0xffffffffu << ilog2(size)) | 1; 234 if (flags & IORESOURCE_PREFETCH) 235 ma |= 2; 236 237 pciha = RES_TO_U32_HIGH(pci_addr); 238 pcila = RES_TO_U32_LOW(pci_addr); 239 240 writel(plb_addr, reg + PCIL0_PMM0LA + (0x10 * index)); 241 writel(pcila, reg + PCIL0_PMM0PCILA + (0x10 * index)); 242 writel(pciha, reg + PCIL0_PMM0PCIHA + (0x10 * index)); 243 writel(ma, reg + PCIL0_PMM0MA + (0x10 * index)); 244 245 return 0; 246 } 247 248 static void __init ppc4xx_configure_pci_PMMs(struct pci_controller *hose, 249 void __iomem *reg) 250 { 251 int i, j, found_isa_hole = 0; 252 253 /* Setup outbound memory windows */ 254 for (i = j = 0; i < 3; i++) { 255 struct resource *res = &hose->mem_resources[i]; 256 resource_size_t offset = hose->mem_offset[i]; 257 258 /* we only care about memory windows */ 259 if (!(res->flags & IORESOURCE_MEM)) 260 continue; 261 if (j > 2) { 262 printk(KERN_WARNING "%pOF: Too many ranges\n", hose->dn); 263 break; 264 } 265 266 /* Configure the resource */ 267 if (ppc4xx_setup_one_pci_PMM(hose, reg, 268 res->start, 269 res->start - offset, 270 resource_size(res), 271 res->flags, 272 j) == 0) { 273 j++; 274 275 /* If the resource PCI address is 0 then we have our 276 * ISA memory hole 277 */ 278 if (res->start == offset) 279 found_isa_hole = 1; 280 } 281 } 282 283 /* Handle ISA memory hole if not already covered */ 284 if (j <= 2 && !found_isa_hole && hose->isa_mem_size) 285 if (ppc4xx_setup_one_pci_PMM(hose, reg, hose->isa_mem_phys, 0, 286 hose->isa_mem_size, 0, j) == 0) 287 printk(KERN_INFO "%pOF: Legacy ISA memory support enabled\n", 288 hose->dn); 289 } 290 291 static void __init ppc4xx_configure_pci_PTMs(struct pci_controller *hose, 292 void __iomem *reg, 293 const struct resource *res) 294 { 295 resource_size_t size = resource_size(res); 296 u32 sa; 297 298 /* Calculate window size */ 299 sa = (0xffffffffu << ilog2(size)) | 1; 300 sa |= 0x1; 301 302 /* RAM is always at 0 local for now */ 303 writel(0, reg + PCIL0_PTM1LA); 304 writel(sa, reg + PCIL0_PTM1MS); 305 306 /* Map on PCI side */ 307 early_write_config_dword(hose, hose->first_busno, 0, 308 PCI_BASE_ADDRESS_1, res->start); 309 early_write_config_dword(hose, hose->first_busno, 0, 310 PCI_BASE_ADDRESS_2, 0x00000000); 311 early_write_config_word(hose, hose->first_busno, 0, 312 PCI_COMMAND, 0x0006); 313 } 314 315 static void __init ppc4xx_probe_pci_bridge(struct device_node *np) 316 { 317 /* NYI */ 318 struct resource rsrc_cfg; 319 struct resource rsrc_reg; 320 struct resource dma_window; 321 struct pci_controller *hose = NULL; 322 void __iomem *reg = NULL; 323 const int *bus_range; 324 int primary = 0; 325 326 /* Check if device is enabled */ 327 if (!of_device_is_available(np)) { 328 printk(KERN_INFO "%pOF: Port disabled via device-tree\n", np); 329 return; 330 } 331 332 /* Fetch config space registers address */ 333 if (of_address_to_resource(np, 0, &rsrc_cfg)) { 334 printk(KERN_ERR "%pOF: Can't get PCI config register base !", 335 np); 336 return; 337 } 338 /* Fetch host bridge internal registers address */ 339 if (of_address_to_resource(np, 3, &rsrc_reg)) { 340 printk(KERN_ERR "%pOF: Can't get PCI internal register base !", 341 np); 342 return; 343 } 344 345 /* Check if primary bridge */ 346 if (of_property_read_bool(np, "primary")) 347 primary = 1; 348 349 /* Get bus range if any */ 350 bus_range = of_get_property(np, "bus-range", NULL); 351 352 /* Map registers */ 353 reg = ioremap(rsrc_reg.start, resource_size(&rsrc_reg)); 354 if (reg == NULL) { 355 printk(KERN_ERR "%pOF: Can't map registers !", np); 356 goto fail; 357 } 358 359 /* Allocate the host controller data structure */ 360 hose = pcibios_alloc_controller(np); 361 if (!hose) 362 goto fail; 363 364 hose->first_busno = bus_range ? bus_range[0] : 0x0; 365 hose->last_busno = bus_range ? bus_range[1] : 0xff; 366 367 /* Setup config space */ 368 setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0); 369 370 /* Disable all windows */ 371 writel(0, reg + PCIL0_PMM0MA); 372 writel(0, reg + PCIL0_PMM1MA); 373 writel(0, reg + PCIL0_PMM2MA); 374 writel(0, reg + PCIL0_PTM1MS); 375 writel(0, reg + PCIL0_PTM2MS); 376 377 /* Parse outbound mapping resources */ 378 pci_process_bridge_OF_ranges(hose, np, primary); 379 380 /* Parse inbound mapping resources */ 381 if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0) 382 goto fail; 383 384 /* Configure outbound ranges POMs */ 385 ppc4xx_configure_pci_PMMs(hose, reg); 386 387 /* Configure inbound ranges PIMs */ 388 ppc4xx_configure_pci_PTMs(hose, reg, &dma_window); 389 390 /* We don't need the registers anymore */ 391 iounmap(reg); 392 return; 393 394 fail: 395 if (hose) 396 pcibios_free_controller(hose); 397 if (reg) 398 iounmap(reg); 399 } 400 401 /* 402 * 4xx PCI-X part 403 */ 404 405 static int __init ppc4xx_setup_one_pcix_POM(struct pci_controller *hose, 406 void __iomem *reg, 407 u64 plb_addr, 408 u64 pci_addr, 409 u64 size, 410 unsigned int flags, 411 int index) 412 { 413 u32 lah, lal, pciah, pcial, sa; 414 415 if (!is_power_of_2(size) || size < 0x1000 || 416 (plb_addr & (size - 1)) != 0) { 417 printk(KERN_WARNING "%pOF: Resource out of range\n", 418 hose->dn); 419 return -1; 420 } 421 422 /* Calculate register values */ 423 lah = RES_TO_U32_HIGH(plb_addr); 424 lal = RES_TO_U32_LOW(plb_addr); 425 pciah = RES_TO_U32_HIGH(pci_addr); 426 pcial = RES_TO_U32_LOW(pci_addr); 427 sa = (0xffffffffu << ilog2(size)) | 0x1; 428 429 /* Program register values */ 430 if (index == 0) { 431 writel(lah, reg + PCIX0_POM0LAH); 432 writel(lal, reg + PCIX0_POM0LAL); 433 writel(pciah, reg + PCIX0_POM0PCIAH); 434 writel(pcial, reg + PCIX0_POM0PCIAL); 435 writel(sa, reg + PCIX0_POM0SA); 436 } else { 437 writel(lah, reg + PCIX0_POM1LAH); 438 writel(lal, reg + PCIX0_POM1LAL); 439 writel(pciah, reg + PCIX0_POM1PCIAH); 440 writel(pcial, reg + PCIX0_POM1PCIAL); 441 writel(sa, reg + PCIX0_POM1SA); 442 } 443 444 return 0; 445 } 446 447 static void __init ppc4xx_configure_pcix_POMs(struct pci_controller *hose, 448 void __iomem *reg) 449 { 450 int i, j, found_isa_hole = 0; 451 452 /* Setup outbound memory windows */ 453 for (i = j = 0; i < 3; i++) { 454 struct resource *res = &hose->mem_resources[i]; 455 resource_size_t offset = hose->mem_offset[i]; 456 457 /* we only care about memory windows */ 458 if (!(res->flags & IORESOURCE_MEM)) 459 continue; 460 if (j > 1) { 461 printk(KERN_WARNING "%pOF: Too many ranges\n", hose->dn); 462 break; 463 } 464 465 /* Configure the resource */ 466 if (ppc4xx_setup_one_pcix_POM(hose, reg, 467 res->start, 468 res->start - offset, 469 resource_size(res), 470 res->flags, 471 j) == 0) { 472 j++; 473 474 /* If the resource PCI address is 0 then we have our 475 * ISA memory hole 476 */ 477 if (res->start == offset) 478 found_isa_hole = 1; 479 } 480 } 481 482 /* Handle ISA memory hole if not already covered */ 483 if (j <= 1 && !found_isa_hole && hose->isa_mem_size) 484 if (ppc4xx_setup_one_pcix_POM(hose, reg, hose->isa_mem_phys, 0, 485 hose->isa_mem_size, 0, j) == 0) 486 printk(KERN_INFO "%pOF: Legacy ISA memory support enabled\n", 487 hose->dn); 488 } 489 490 static void __init ppc4xx_configure_pcix_PIMs(struct pci_controller *hose, 491 void __iomem *reg, 492 const struct resource *res, 493 int big_pim, 494 int enable_msi_hole) 495 { 496 resource_size_t size = resource_size(res); 497 u32 sa; 498 499 /* RAM is always at 0 */ 500 writel(0x00000000, reg + PCIX0_PIM0LAH); 501 writel(0x00000000, reg + PCIX0_PIM0LAL); 502 503 /* Calculate window size */ 504 sa = (0xffffffffu << ilog2(size)) | 1; 505 sa |= 0x1; 506 if (res->flags & IORESOURCE_PREFETCH) 507 sa |= 0x2; 508 if (enable_msi_hole) 509 sa |= 0x4; 510 writel(sa, reg + PCIX0_PIM0SA); 511 if (big_pim) 512 writel(0xffffffff, reg + PCIX0_PIM0SAH); 513 514 /* Map on PCI side */ 515 writel(0x00000000, reg + PCIX0_BAR0H); 516 writel(res->start, reg + PCIX0_BAR0L); 517 writew(0x0006, reg + PCIX0_COMMAND); 518 } 519 520 static void __init ppc4xx_probe_pcix_bridge(struct device_node *np) 521 { 522 struct resource rsrc_cfg; 523 struct resource rsrc_reg; 524 struct resource dma_window; 525 struct pci_controller *hose = NULL; 526 void __iomem *reg = NULL; 527 const int *bus_range; 528 int big_pim, msi, primary; 529 530 /* Fetch config space registers address */ 531 if (of_address_to_resource(np, 0, &rsrc_cfg)) { 532 printk(KERN_ERR "%pOF: Can't get PCI-X config register base !", 533 np); 534 return; 535 } 536 /* Fetch host bridge internal registers address */ 537 if (of_address_to_resource(np, 3, &rsrc_reg)) { 538 printk(KERN_ERR "%pOF: Can't get PCI-X internal register base !", 539 np); 540 return; 541 } 542 543 /* Check if it supports large PIMs (440GX) */ 544 big_pim = of_property_read_bool(np, "large-inbound-windows"); 545 546 /* Check if we should enable MSIs inbound hole */ 547 msi = of_property_read_bool(np, "enable-msi-hole"); 548 549 /* Check if primary bridge */ 550 primary = of_property_read_bool(np, "primary"); 551 552 /* Get bus range if any */ 553 bus_range = of_get_property(np, "bus-range", NULL); 554 555 /* Map registers */ 556 reg = ioremap(rsrc_reg.start, resource_size(&rsrc_reg)); 557 if (reg == NULL) { 558 printk(KERN_ERR "%pOF: Can't map registers !", np); 559 goto fail; 560 } 561 562 /* Allocate the host controller data structure */ 563 hose = pcibios_alloc_controller(np); 564 if (!hose) 565 goto fail; 566 567 hose->first_busno = bus_range ? bus_range[0] : 0x0; 568 hose->last_busno = bus_range ? bus_range[1] : 0xff; 569 570 /* Setup config space */ 571 setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 572 PPC_INDIRECT_TYPE_SET_CFG_TYPE); 573 574 /* Disable all windows */ 575 writel(0, reg + PCIX0_POM0SA); 576 writel(0, reg + PCIX0_POM1SA); 577 writel(0, reg + PCIX0_POM2SA); 578 writel(0, reg + PCIX0_PIM0SA); 579 writel(0, reg + PCIX0_PIM1SA); 580 writel(0, reg + PCIX0_PIM2SA); 581 if (big_pim) { 582 writel(0, reg + PCIX0_PIM0SAH); 583 writel(0, reg + PCIX0_PIM2SAH); 584 } 585 586 /* Parse outbound mapping resources */ 587 pci_process_bridge_OF_ranges(hose, np, primary); 588 589 /* Parse inbound mapping resources */ 590 if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0) 591 goto fail; 592 593 /* Configure outbound ranges POMs */ 594 ppc4xx_configure_pcix_POMs(hose, reg); 595 596 /* Configure inbound ranges PIMs */ 597 ppc4xx_configure_pcix_PIMs(hose, reg, &dma_window, big_pim, msi); 598 599 /* We don't need the registers anymore */ 600 iounmap(reg); 601 return; 602 603 fail: 604 if (hose) 605 pcibios_free_controller(hose); 606 if (reg) 607 iounmap(reg); 608 } 609 610 #ifdef CONFIG_PPC4xx_PCI_EXPRESS 611 612 /* 613 * 4xx PCI-Express part 614 * 615 * We support 3 parts currently based on the compatible property: 616 * 617 * ibm,plb-pciex-440spe 618 * ibm,plb-pciex-405ex 619 * ibm,plb-pciex-460ex 620 * 621 * Anything else will be rejected for now as they are all subtly 622 * different unfortunately. 623 * 624 */ 625 626 #define MAX_PCIE_BUS_MAPPED 0x40 627 628 struct ppc4xx_pciex_port 629 { 630 struct pci_controller *hose; 631 struct device_node *node; 632 unsigned int index; 633 int endpoint; 634 int link; 635 int has_ibpre; 636 unsigned int sdr_base; 637 dcr_host_t dcrs; 638 struct resource cfg_space; 639 struct resource utl_regs; 640 void __iomem *utl_base; 641 }; 642 643 static struct ppc4xx_pciex_port *ppc4xx_pciex_ports; 644 static unsigned int ppc4xx_pciex_port_count; 645 646 struct ppc4xx_pciex_hwops 647 { 648 bool want_sdr; 649 int (*core_init)(struct device_node *np); 650 int (*port_init_hw)(struct ppc4xx_pciex_port *port); 651 int (*setup_utl)(struct ppc4xx_pciex_port *port); 652 void (*check_link)(struct ppc4xx_pciex_port *port); 653 }; 654 655 static struct ppc4xx_pciex_hwops *ppc4xx_pciex_hwops; 656 657 static int __init ppc4xx_pciex_wait_on_sdr(struct ppc4xx_pciex_port *port, 658 unsigned int sdr_offset, 659 unsigned int mask, 660 unsigned int value, 661 int timeout_ms) 662 { 663 u32 val; 664 665 while(timeout_ms--) { 666 val = mfdcri(SDR0, port->sdr_base + sdr_offset); 667 if ((val & mask) == value) { 668 pr_debug("PCIE%d: Wait on SDR %x success with tm %d (%08x)\n", 669 port->index, sdr_offset, timeout_ms, val); 670 return 0; 671 } 672 msleep(1); 673 } 674 return -1; 675 } 676 677 static int __init ppc4xx_pciex_port_reset_sdr(struct ppc4xx_pciex_port *port) 678 { 679 /* Wait for reset to complete */ 680 if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1 << 20, 0, 10)) { 681 printk(KERN_WARNING "PCIE%d: PGRST failed\n", 682 port->index); 683 return -1; 684 } 685 return 0; 686 } 687 688 689 static void __init ppc4xx_pciex_check_link_sdr(struct ppc4xx_pciex_port *port) 690 { 691 printk(KERN_INFO "PCIE%d: Checking link...\n", port->index); 692 693 /* Check for card presence detect if supported, if not, just wait for 694 * link unconditionally. 695 * 696 * note that we don't fail if there is no link, we just filter out 697 * config space accesses. That way, it will be easier to implement 698 * hotplug later on. 699 */ 700 if (!port->has_ibpre || 701 !ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP, 702 1 << 28, 1 << 28, 100)) { 703 printk(KERN_INFO 704 "PCIE%d: Device detected, waiting for link...\n", 705 port->index); 706 if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP, 707 0x1000, 0x1000, 2000)) 708 printk(KERN_WARNING 709 "PCIE%d: Link up failed\n", port->index); 710 else { 711 printk(KERN_INFO 712 "PCIE%d: link is up !\n", port->index); 713 port->link = 1; 714 } 715 } else 716 printk(KERN_INFO "PCIE%d: No device detected.\n", port->index); 717 } 718 719 #ifdef CONFIG_44x 720 721 /* Check various reset bits of the 440SPe PCIe core */ 722 static int __init ppc440spe_pciex_check_reset(struct device_node *np) 723 { 724 u32 valPE0, valPE1, valPE2; 725 int err = 0; 726 727 /* SDR0_PEGPLLLCT1 reset */ 728 if (!(mfdcri(SDR0, PESDR0_PLLLCT1) & 0x01000000)) { 729 /* 730 * the PCIe core was probably already initialised 731 * by firmware - let's re-reset RCSSET regs 732 * 733 * -- Shouldn't we also re-reset the whole thing ? -- BenH 734 */ 735 pr_debug("PCIE: SDR0_PLLLCT1 already reset.\n"); 736 mtdcri(SDR0, PESDR0_440SPE_RCSSET, 0x01010000); 737 mtdcri(SDR0, PESDR1_440SPE_RCSSET, 0x01010000); 738 mtdcri(SDR0, PESDR2_440SPE_RCSSET, 0x01010000); 739 } 740 741 valPE0 = mfdcri(SDR0, PESDR0_440SPE_RCSSET); 742 valPE1 = mfdcri(SDR0, PESDR1_440SPE_RCSSET); 743 valPE2 = mfdcri(SDR0, PESDR2_440SPE_RCSSET); 744 745 /* SDR0_PExRCSSET rstgu */ 746 if (!(valPE0 & 0x01000000) || 747 !(valPE1 & 0x01000000) || 748 !(valPE2 & 0x01000000)) { 749 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstgu error\n"); 750 err = -1; 751 } 752 753 /* SDR0_PExRCSSET rstdl */ 754 if (!(valPE0 & 0x00010000) || 755 !(valPE1 & 0x00010000) || 756 !(valPE2 & 0x00010000)) { 757 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstdl error\n"); 758 err = -1; 759 } 760 761 /* SDR0_PExRCSSET rstpyn */ 762 if ((valPE0 & 0x00001000) || 763 (valPE1 & 0x00001000) || 764 (valPE2 & 0x00001000)) { 765 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstpyn error\n"); 766 err = -1; 767 } 768 769 /* SDR0_PExRCSSET hldplb */ 770 if ((valPE0 & 0x10000000) || 771 (valPE1 & 0x10000000) || 772 (valPE2 & 0x10000000)) { 773 printk(KERN_INFO "PCIE: SDR0_PExRCSSET hldplb error\n"); 774 err = -1; 775 } 776 777 /* SDR0_PExRCSSET rdy */ 778 if ((valPE0 & 0x00100000) || 779 (valPE1 & 0x00100000) || 780 (valPE2 & 0x00100000)) { 781 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rdy error\n"); 782 err = -1; 783 } 784 785 /* SDR0_PExRCSSET shutdown */ 786 if ((valPE0 & 0x00000100) || 787 (valPE1 & 0x00000100) || 788 (valPE2 & 0x00000100)) { 789 printk(KERN_INFO "PCIE: SDR0_PExRCSSET shutdown error\n"); 790 err = -1; 791 } 792 793 return err; 794 } 795 796 /* Global PCIe core initializations for 440SPe core */ 797 static int __init ppc440spe_pciex_core_init(struct device_node *np) 798 { 799 int time_out = 20; 800 801 /* Set PLL clock receiver to LVPECL */ 802 dcri_clrset(SDR0, PESDR0_PLLLCT1, 0, 1 << 28); 803 804 /* Shouldn't we do all the calibration stuff etc... here ? */ 805 if (ppc440spe_pciex_check_reset(np)) 806 return -ENXIO; 807 808 if (!(mfdcri(SDR0, PESDR0_PLLLCT2) & 0x10000)) { 809 printk(KERN_INFO "PCIE: PESDR_PLLCT2 resistance calibration " 810 "failed (0x%08x)\n", 811 mfdcri(SDR0, PESDR0_PLLLCT2)); 812 return -1; 813 } 814 815 /* De-assert reset of PCIe PLL, wait for lock */ 816 dcri_clrset(SDR0, PESDR0_PLLLCT1, 1 << 24, 0); 817 udelay(3); 818 819 while (time_out) { 820 if (!(mfdcri(SDR0, PESDR0_PLLLCT3) & 0x10000000)) { 821 time_out--; 822 udelay(1); 823 } else 824 break; 825 } 826 if (!time_out) { 827 printk(KERN_INFO "PCIE: VCO output not locked\n"); 828 return -1; 829 } 830 831 pr_debug("PCIE initialization OK\n"); 832 833 return 3; 834 } 835 836 static int __init ppc440spe_pciex_init_port_hw(struct ppc4xx_pciex_port *port) 837 { 838 u32 val = 1 << 24; 839 840 if (port->endpoint) 841 val = PTYPE_LEGACY_ENDPOINT << 20; 842 else 843 val = PTYPE_ROOT_PORT << 20; 844 845 if (port->index == 0) 846 val |= LNKW_X8 << 12; 847 else 848 val |= LNKW_X4 << 12; 849 850 mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); 851 mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x20222222); 852 if (ppc440spe_revA()) 853 mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x11000000); 854 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL0SET1, 0x35000000); 855 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL1SET1, 0x35000000); 856 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL2SET1, 0x35000000); 857 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL3SET1, 0x35000000); 858 if (port->index == 0) { 859 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL4SET1, 860 0x35000000); 861 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL5SET1, 862 0x35000000); 863 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL6SET1, 864 0x35000000); 865 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL7SET1, 866 0x35000000); 867 } 868 dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, 869 (1 << 24) | (1 << 16), 1 << 12); 870 871 return ppc4xx_pciex_port_reset_sdr(port); 872 } 873 874 static int __init ppc440speA_pciex_init_port_hw(struct ppc4xx_pciex_port *port) 875 { 876 return ppc440spe_pciex_init_port_hw(port); 877 } 878 879 static int __init ppc440speB_pciex_init_port_hw(struct ppc4xx_pciex_port *port) 880 { 881 int rc = ppc440spe_pciex_init_port_hw(port); 882 883 port->has_ibpre = 1; 884 885 return rc; 886 } 887 888 static int ppc440speA_pciex_init_utl(struct ppc4xx_pciex_port *port) 889 { 890 /* XXX Check what that value means... I hate magic */ 891 dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x68782800); 892 893 /* 894 * Set buffer allocations and then assert VRB and TXE. 895 */ 896 out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000); 897 out_be32(port->utl_base + PEUTL_INTR, 0x02000000); 898 out_be32(port->utl_base + PEUTL_OPDBSZ, 0x10000000); 899 out_be32(port->utl_base + PEUTL_PBBSZ, 0x53000000); 900 out_be32(port->utl_base + PEUTL_IPHBSZ, 0x08000000); 901 out_be32(port->utl_base + PEUTL_IPDBSZ, 0x10000000); 902 out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000); 903 out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); 904 905 return 0; 906 } 907 908 static int ppc440speB_pciex_init_utl(struct ppc4xx_pciex_port *port) 909 { 910 /* Report CRS to the operating system */ 911 out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000); 912 913 return 0; 914 } 915 916 static struct ppc4xx_pciex_hwops ppc440speA_pcie_hwops __initdata = 917 { 918 .want_sdr = true, 919 .core_init = ppc440spe_pciex_core_init, 920 .port_init_hw = ppc440speA_pciex_init_port_hw, 921 .setup_utl = ppc440speA_pciex_init_utl, 922 .check_link = ppc4xx_pciex_check_link_sdr, 923 }; 924 925 static struct ppc4xx_pciex_hwops ppc440speB_pcie_hwops __initdata = 926 { 927 .want_sdr = true, 928 .core_init = ppc440spe_pciex_core_init, 929 .port_init_hw = ppc440speB_pciex_init_port_hw, 930 .setup_utl = ppc440speB_pciex_init_utl, 931 .check_link = ppc4xx_pciex_check_link_sdr, 932 }; 933 934 static int __init ppc460ex_pciex_core_init(struct device_node *np) 935 { 936 /* Nothing to do, return 2 ports */ 937 return 2; 938 } 939 940 static int __init ppc460ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port) 941 { 942 u32 val; 943 u32 utlset1; 944 945 if (port->endpoint) 946 val = PTYPE_LEGACY_ENDPOINT << 20; 947 else 948 val = PTYPE_ROOT_PORT << 20; 949 950 if (port->index == 0) { 951 val |= LNKW_X1 << 12; 952 utlset1 = 0x20000000; 953 } else { 954 val |= LNKW_X4 << 12; 955 utlset1 = 0x20101101; 956 } 957 958 mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); 959 mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, utlset1); 960 mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01210000); 961 962 switch (port->index) { 963 case 0: 964 mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230); 965 mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130); 966 mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006); 967 968 mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST,0x10000000); 969 break; 970 971 case 1: 972 mtdcri(SDR0, PESDR1_460EX_L0CDRCTL, 0x00003230); 973 mtdcri(SDR0, PESDR1_460EX_L1CDRCTL, 0x00003230); 974 mtdcri(SDR0, PESDR1_460EX_L2CDRCTL, 0x00003230); 975 mtdcri(SDR0, PESDR1_460EX_L3CDRCTL, 0x00003230); 976 mtdcri(SDR0, PESDR1_460EX_L0DRV, 0x00000130); 977 mtdcri(SDR0, PESDR1_460EX_L1DRV, 0x00000130); 978 mtdcri(SDR0, PESDR1_460EX_L2DRV, 0x00000130); 979 mtdcri(SDR0, PESDR1_460EX_L3DRV, 0x00000130); 980 mtdcri(SDR0, PESDR1_460EX_L0CLK, 0x00000006); 981 mtdcri(SDR0, PESDR1_460EX_L1CLK, 0x00000006); 982 mtdcri(SDR0, PESDR1_460EX_L2CLK, 0x00000006); 983 mtdcri(SDR0, PESDR1_460EX_L3CLK, 0x00000006); 984 985 mtdcri(SDR0, PESDR1_460EX_PHY_CTL_RST,0x10000000); 986 break; 987 } 988 989 mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 990 mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) | 991 (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTPYN)); 992 993 /* Poll for PHY reset */ 994 /* XXX FIXME add timeout */ 995 switch (port->index) { 996 case 0: 997 while (!(mfdcri(SDR0, PESDR0_460EX_RSTSTA) & 0x1)) 998 udelay(10); 999 break; 1000 case 1: 1001 while (!(mfdcri(SDR0, PESDR1_460EX_RSTSTA) & 0x1)) 1002 udelay(10); 1003 break; 1004 } 1005 1006 mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 1007 (mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) & 1008 ~(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL)) | 1009 PESDRx_RCSSET_RSTPYN); 1010 1011 port->has_ibpre = 1; 1012 1013 return ppc4xx_pciex_port_reset_sdr(port); 1014 } 1015 1016 static int ppc460ex_pciex_init_utl(struct ppc4xx_pciex_port *port) 1017 { 1018 dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0); 1019 1020 /* 1021 * Set buffer allocations and then assert VRB and TXE. 1022 */ 1023 out_be32(port->utl_base + PEUTL_PBCTL, 0x0800000c); 1024 out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000); 1025 out_be32(port->utl_base + PEUTL_INTR, 0x02000000); 1026 out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000); 1027 out_be32(port->utl_base + PEUTL_PBBSZ, 0x00000000); 1028 out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000); 1029 out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000); 1030 out_be32(port->utl_base + PEUTL_RCIRQEN,0x00f00000); 1031 out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); 1032 1033 return 0; 1034 } 1035 1036 static struct ppc4xx_pciex_hwops ppc460ex_pcie_hwops __initdata = 1037 { 1038 .want_sdr = true, 1039 .core_init = ppc460ex_pciex_core_init, 1040 .port_init_hw = ppc460ex_pciex_init_port_hw, 1041 .setup_utl = ppc460ex_pciex_init_utl, 1042 .check_link = ppc4xx_pciex_check_link_sdr, 1043 }; 1044 1045 static int __init apm821xx_pciex_core_init(struct device_node *np) 1046 { 1047 /* Return the number of pcie port */ 1048 return 1; 1049 } 1050 1051 static int __init apm821xx_pciex_init_port_hw(struct ppc4xx_pciex_port *port) 1052 { 1053 u32 val; 1054 1055 /* 1056 * Do a software reset on PCIe ports. 1057 * This code is to fix the issue that pci drivers doesn't re-assign 1058 * bus number for PCIE devices after Uboot 1059 * scanned and configured all the buses (eg. PCIE NIC IntelPro/1000 1060 * PT quad port, SAS LSI 1064E) 1061 */ 1062 1063 mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST, 0x0); 1064 mdelay(10); 1065 1066 if (port->endpoint) 1067 val = PTYPE_LEGACY_ENDPOINT << 20; 1068 else 1069 val = PTYPE_ROOT_PORT << 20; 1070 1071 val |= LNKW_X1 << 12; 1072 1073 mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); 1074 mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000); 1075 mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000); 1076 1077 mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230); 1078 mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130); 1079 mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006); 1080 1081 mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST, 0x10000000); 1082 mdelay(50); 1083 mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST, 0x30000000); 1084 1085 mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 1086 mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) | 1087 (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTPYN)); 1088 1089 /* Poll for PHY reset */ 1090 val = PESDR0_460EX_RSTSTA - port->sdr_base; 1091 if (ppc4xx_pciex_wait_on_sdr(port, val, 0x1, 1, 100)) { 1092 printk(KERN_WARNING "%s: PCIE: Can't reset PHY\n", __func__); 1093 return -EBUSY; 1094 } else { 1095 mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 1096 (mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) & 1097 ~(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL)) | 1098 PESDRx_RCSSET_RSTPYN); 1099 1100 port->has_ibpre = 1; 1101 return 0; 1102 } 1103 } 1104 1105 static struct ppc4xx_pciex_hwops apm821xx_pcie_hwops __initdata = { 1106 .want_sdr = true, 1107 .core_init = apm821xx_pciex_core_init, 1108 .port_init_hw = apm821xx_pciex_init_port_hw, 1109 .setup_utl = ppc460ex_pciex_init_utl, 1110 .check_link = ppc4xx_pciex_check_link_sdr, 1111 }; 1112 1113 static int __init ppc460sx_pciex_core_init(struct device_node *np) 1114 { 1115 /* HSS drive amplitude */ 1116 mtdcri(SDR0, PESDR0_460SX_HSSL0DAMP, 0xB9843211); 1117 mtdcri(SDR0, PESDR0_460SX_HSSL1DAMP, 0xB9843211); 1118 mtdcri(SDR0, PESDR0_460SX_HSSL2DAMP, 0xB9843211); 1119 mtdcri(SDR0, PESDR0_460SX_HSSL3DAMP, 0xB9843211); 1120 mtdcri(SDR0, PESDR0_460SX_HSSL4DAMP, 0xB9843211); 1121 mtdcri(SDR0, PESDR0_460SX_HSSL5DAMP, 0xB9843211); 1122 mtdcri(SDR0, PESDR0_460SX_HSSL6DAMP, 0xB9843211); 1123 mtdcri(SDR0, PESDR0_460SX_HSSL7DAMP, 0xB9843211); 1124 1125 mtdcri(SDR0, PESDR1_460SX_HSSL0DAMP, 0xB9843211); 1126 mtdcri(SDR0, PESDR1_460SX_HSSL1DAMP, 0xB9843211); 1127 mtdcri(SDR0, PESDR1_460SX_HSSL2DAMP, 0xB9843211); 1128 mtdcri(SDR0, PESDR1_460SX_HSSL3DAMP, 0xB9843211); 1129 1130 mtdcri(SDR0, PESDR2_460SX_HSSL0DAMP, 0xB9843211); 1131 mtdcri(SDR0, PESDR2_460SX_HSSL1DAMP, 0xB9843211); 1132 mtdcri(SDR0, PESDR2_460SX_HSSL2DAMP, 0xB9843211); 1133 mtdcri(SDR0, PESDR2_460SX_HSSL3DAMP, 0xB9843211); 1134 1135 /* HSS TX pre-emphasis */ 1136 mtdcri(SDR0, PESDR0_460SX_HSSL0COEFA, 0xDCB98987); 1137 mtdcri(SDR0, PESDR0_460SX_HSSL1COEFA, 0xDCB98987); 1138 mtdcri(SDR0, PESDR0_460SX_HSSL2COEFA, 0xDCB98987); 1139 mtdcri(SDR0, PESDR0_460SX_HSSL3COEFA, 0xDCB98987); 1140 mtdcri(SDR0, PESDR0_460SX_HSSL4COEFA, 0xDCB98987); 1141 mtdcri(SDR0, PESDR0_460SX_HSSL5COEFA, 0xDCB98987); 1142 mtdcri(SDR0, PESDR0_460SX_HSSL6COEFA, 0xDCB98987); 1143 mtdcri(SDR0, PESDR0_460SX_HSSL7COEFA, 0xDCB98987); 1144 1145 mtdcri(SDR0, PESDR1_460SX_HSSL0COEFA, 0xDCB98987); 1146 mtdcri(SDR0, PESDR1_460SX_HSSL1COEFA, 0xDCB98987); 1147 mtdcri(SDR0, PESDR1_460SX_HSSL2COEFA, 0xDCB98987); 1148 mtdcri(SDR0, PESDR1_460SX_HSSL3COEFA, 0xDCB98987); 1149 1150 mtdcri(SDR0, PESDR2_460SX_HSSL0COEFA, 0xDCB98987); 1151 mtdcri(SDR0, PESDR2_460SX_HSSL1COEFA, 0xDCB98987); 1152 mtdcri(SDR0, PESDR2_460SX_HSSL2COEFA, 0xDCB98987); 1153 mtdcri(SDR0, PESDR2_460SX_HSSL3COEFA, 0xDCB98987); 1154 1155 /* HSS TX calibration control */ 1156 mtdcri(SDR0, PESDR0_460SX_HSSL1CALDRV, 0x22222222); 1157 mtdcri(SDR0, PESDR1_460SX_HSSL1CALDRV, 0x22220000); 1158 mtdcri(SDR0, PESDR2_460SX_HSSL1CALDRV, 0x22220000); 1159 1160 /* HSS TX slew control */ 1161 mtdcri(SDR0, PESDR0_460SX_HSSSLEW, 0xFFFFFFFF); 1162 mtdcri(SDR0, PESDR1_460SX_HSSSLEW, 0xFFFF0000); 1163 mtdcri(SDR0, PESDR2_460SX_HSSSLEW, 0xFFFF0000); 1164 1165 /* Set HSS PRBS enabled */ 1166 mtdcri(SDR0, PESDR0_460SX_HSSCTLSET, 0x00001130); 1167 mtdcri(SDR0, PESDR2_460SX_HSSCTLSET, 0x00001130); 1168 1169 udelay(100); 1170 1171 /* De-assert PLLRESET */ 1172 dcri_clrset(SDR0, PESDR0_PLLLCT2, 0x00000100, 0); 1173 1174 /* Reset DL, UTL, GPL before configuration */ 1175 mtdcri(SDR0, PESDR0_460SX_RCSSET, 1176 PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU); 1177 mtdcri(SDR0, PESDR1_460SX_RCSSET, 1178 PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU); 1179 mtdcri(SDR0, PESDR2_460SX_RCSSET, 1180 PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU); 1181 1182 udelay(100); 1183 1184 /* 1185 * If bifurcation is not enabled, u-boot would have disabled the 1186 * third PCIe port 1187 */ 1188 if (((mfdcri(SDR0, PESDR1_460SX_HSSCTLSET) & 0x00000001) == 1189 0x00000001)) { 1190 printk(KERN_INFO "PCI: PCIE bifurcation setup successfully.\n"); 1191 printk(KERN_INFO "PCI: Total 3 PCIE ports are present\n"); 1192 return 3; 1193 } 1194 1195 printk(KERN_INFO "PCI: Total 2 PCIE ports are present\n"); 1196 return 2; 1197 } 1198 1199 static int __init ppc460sx_pciex_init_port_hw(struct ppc4xx_pciex_port *port) 1200 { 1201 1202 if (port->endpoint) 1203 dcri_clrset(SDR0, port->sdr_base + PESDRn_UTLSET2, 1204 0x01000000, 0); 1205 else 1206 dcri_clrset(SDR0, port->sdr_base + PESDRn_UTLSET2, 1207 0, 0x01000000); 1208 1209 dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, 1210 (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL), 1211 PESDRx_RCSSET_RSTPYN); 1212 1213 port->has_ibpre = 1; 1214 1215 return ppc4xx_pciex_port_reset_sdr(port); 1216 } 1217 1218 static int ppc460sx_pciex_init_utl(struct ppc4xx_pciex_port *port) 1219 { 1220 /* Max 128 Bytes */ 1221 out_be32 (port->utl_base + PEUTL_PBBSZ, 0x00000000); 1222 /* Assert VRB and TXE - per datasheet turn off addr validation */ 1223 out_be32(port->utl_base + PEUTL_PCTL, 0x80800000); 1224 return 0; 1225 } 1226 1227 static void __init ppc460sx_pciex_check_link(struct ppc4xx_pciex_port *port) 1228 { 1229 void __iomem *mbase; 1230 int attempt = 50; 1231 1232 port->link = 0; 1233 1234 mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000); 1235 if (mbase == NULL) { 1236 printk(KERN_ERR "%pOF: Can't map internal config space !", 1237 port->node); 1238 return; 1239 } 1240 1241 while (attempt && (0 == (in_le32(mbase + PECFG_460SX_DLLSTA) 1242 & PECFG_460SX_DLLSTA_LINKUP))) { 1243 attempt--; 1244 mdelay(10); 1245 } 1246 if (attempt) 1247 port->link = 1; 1248 iounmap(mbase); 1249 } 1250 1251 static struct ppc4xx_pciex_hwops ppc460sx_pcie_hwops __initdata = { 1252 .want_sdr = true, 1253 .core_init = ppc460sx_pciex_core_init, 1254 .port_init_hw = ppc460sx_pciex_init_port_hw, 1255 .setup_utl = ppc460sx_pciex_init_utl, 1256 .check_link = ppc460sx_pciex_check_link, 1257 }; 1258 1259 #endif /* CONFIG_44x */ 1260 1261 #ifdef CONFIG_476FPE 1262 static int __init ppc_476fpe_pciex_core_init(struct device_node *np) 1263 { 1264 return 4; 1265 } 1266 1267 static void __init ppc_476fpe_pciex_check_link(struct ppc4xx_pciex_port *port) 1268 { 1269 u32 timeout_ms = 20; 1270 u32 val = 0, mask = (PECFG_TLDLP_LNKUP|PECFG_TLDLP_PRESENT); 1271 void __iomem *mbase = ioremap(port->cfg_space.start + 0x10000000, 1272 0x1000); 1273 1274 printk(KERN_INFO "PCIE%d: Checking link...\n", port->index); 1275 1276 if (mbase == NULL) { 1277 printk(KERN_WARNING "PCIE%d: failed to get cfg space\n", 1278 port->index); 1279 return; 1280 } 1281 1282 while (timeout_ms--) { 1283 val = in_le32(mbase + PECFG_TLDLP); 1284 1285 if ((val & mask) == mask) 1286 break; 1287 msleep(10); 1288 } 1289 1290 if (val & PECFG_TLDLP_PRESENT) { 1291 printk(KERN_INFO "PCIE%d: link is up !\n", port->index); 1292 port->link = 1; 1293 } else 1294 printk(KERN_WARNING "PCIE%d: Link up failed\n", port->index); 1295 1296 iounmap(mbase); 1297 } 1298 1299 static struct ppc4xx_pciex_hwops ppc_476fpe_pcie_hwops __initdata = 1300 { 1301 .core_init = ppc_476fpe_pciex_core_init, 1302 .check_link = ppc_476fpe_pciex_check_link, 1303 }; 1304 #endif /* CONFIG_476FPE */ 1305 1306 /* Check that the core has been initied and if not, do it */ 1307 static int __init ppc4xx_pciex_check_core_init(struct device_node *np) 1308 { 1309 static int core_init; 1310 int count = -ENODEV; 1311 1312 if (core_init++) 1313 return 0; 1314 1315 #ifdef CONFIG_44x 1316 if (of_device_is_compatible(np, "ibm,plb-pciex-440spe")) { 1317 if (ppc440spe_revA()) 1318 ppc4xx_pciex_hwops = &ppc440speA_pcie_hwops; 1319 else 1320 ppc4xx_pciex_hwops = &ppc440speB_pcie_hwops; 1321 } 1322 if (of_device_is_compatible(np, "ibm,plb-pciex-460ex")) 1323 ppc4xx_pciex_hwops = &ppc460ex_pcie_hwops; 1324 if (of_device_is_compatible(np, "ibm,plb-pciex-460sx")) 1325 ppc4xx_pciex_hwops = &ppc460sx_pcie_hwops; 1326 if (of_device_is_compatible(np, "ibm,plb-pciex-apm821xx")) 1327 ppc4xx_pciex_hwops = &apm821xx_pcie_hwops; 1328 #endif /* CONFIG_44x */ 1329 #ifdef CONFIG_476FPE 1330 if (of_device_is_compatible(np, "ibm,plb-pciex-476fpe") 1331 || of_device_is_compatible(np, "ibm,plb-pciex-476gtr")) 1332 ppc4xx_pciex_hwops = &ppc_476fpe_pcie_hwops; 1333 #endif 1334 if (ppc4xx_pciex_hwops == NULL) { 1335 printk(KERN_WARNING "PCIE: unknown host type %pOF\n", np); 1336 return -ENODEV; 1337 } 1338 1339 count = ppc4xx_pciex_hwops->core_init(np); 1340 if (count > 0) { 1341 ppc4xx_pciex_ports = 1342 kzalloc_objs(struct ppc4xx_pciex_port, count); 1343 if (ppc4xx_pciex_ports) { 1344 ppc4xx_pciex_port_count = count; 1345 return 0; 1346 } 1347 printk(KERN_WARNING "PCIE: failed to allocate ports array\n"); 1348 return -ENOMEM; 1349 } 1350 return -ENODEV; 1351 } 1352 1353 static void __init ppc4xx_pciex_port_init_mapping(struct ppc4xx_pciex_port *port) 1354 { 1355 /* We map PCI Express configuration based on the reg property */ 1356 dcr_write(port->dcrs, DCRO_PEGPL_CFGBAH, 1357 RES_TO_U32_HIGH(port->cfg_space.start)); 1358 dcr_write(port->dcrs, DCRO_PEGPL_CFGBAL, 1359 RES_TO_U32_LOW(port->cfg_space.start)); 1360 1361 /* XXX FIXME: Use size from reg property. For now, map 512M */ 1362 dcr_write(port->dcrs, DCRO_PEGPL_CFGMSK, 0xe0000001); 1363 1364 /* We map UTL registers based on the reg property */ 1365 dcr_write(port->dcrs, DCRO_PEGPL_REGBAH, 1366 RES_TO_U32_HIGH(port->utl_regs.start)); 1367 dcr_write(port->dcrs, DCRO_PEGPL_REGBAL, 1368 RES_TO_U32_LOW(port->utl_regs.start)); 1369 1370 /* XXX FIXME: Use size from reg property */ 1371 dcr_write(port->dcrs, DCRO_PEGPL_REGMSK, 0x00007001); 1372 1373 /* Disable all other outbound windows */ 1374 dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, 0); 1375 dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, 0); 1376 dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, 0); 1377 dcr_write(port->dcrs, DCRO_PEGPL_MSGMSK, 0); 1378 } 1379 1380 static int __init ppc4xx_pciex_port_init(struct ppc4xx_pciex_port *port) 1381 { 1382 int rc = 0; 1383 1384 /* Init HW */ 1385 if (ppc4xx_pciex_hwops->port_init_hw) 1386 rc = ppc4xx_pciex_hwops->port_init_hw(port); 1387 if (rc != 0) 1388 return rc; 1389 1390 /* 1391 * Initialize mapping: disable all regions and configure 1392 * CFG and REG regions based on resources in the device tree 1393 */ 1394 ppc4xx_pciex_port_init_mapping(port); 1395 1396 if (ppc4xx_pciex_hwops->check_link) 1397 ppc4xx_pciex_hwops->check_link(port); 1398 1399 /* 1400 * Map UTL 1401 */ 1402 port->utl_base = ioremap(port->utl_regs.start, 0x100); 1403 BUG_ON(port->utl_base == NULL); 1404 1405 /* 1406 * Setup UTL registers --BenH. 1407 */ 1408 if (ppc4xx_pciex_hwops->setup_utl) 1409 ppc4xx_pciex_hwops->setup_utl(port); 1410 1411 /* 1412 * Check for VC0 active or PLL Locked and assert RDY. 1413 */ 1414 if (port->sdr_base) { 1415 if (of_device_is_compatible(port->node, 1416 "ibm,plb-pciex-460sx")){ 1417 if (port->link && ppc4xx_pciex_wait_on_sdr(port, 1418 PESDRn_RCSSTS, 1419 1 << 12, 1 << 12, 5000)) { 1420 printk(KERN_INFO "PCIE%d: PLL not locked\n", 1421 port->index); 1422 port->link = 0; 1423 } 1424 } else if (port->link && 1425 ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1426 1 << 16, 1 << 16, 5000)) { 1427 printk(KERN_INFO "PCIE%d: VC0 not active\n", 1428 port->index); 1429 port->link = 0; 1430 } 1431 1432 dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, 0, 1 << 20); 1433 } 1434 1435 msleep(100); 1436 1437 return 0; 1438 } 1439 1440 static int ppc4xx_pciex_validate_bdf(struct ppc4xx_pciex_port *port, 1441 struct pci_bus *bus, 1442 unsigned int devfn) 1443 { 1444 static int message; 1445 1446 /* Endpoint can not generate upstream(remote) config cycles */ 1447 if (port->endpoint && bus->number != port->hose->first_busno) 1448 return PCIBIOS_DEVICE_NOT_FOUND; 1449 1450 /* Check we are within the mapped range */ 1451 if (bus->number > port->hose->last_busno) { 1452 if (!message) { 1453 printk(KERN_WARNING "Warning! Probing bus %u" 1454 " out of range !\n", bus->number); 1455 message++; 1456 } 1457 return PCIBIOS_DEVICE_NOT_FOUND; 1458 } 1459 1460 /* The root complex has only one device / function */ 1461 if (bus->number == port->hose->first_busno && devfn != 0) 1462 return PCIBIOS_DEVICE_NOT_FOUND; 1463 1464 /* The other side of the RC has only one device as well */ 1465 if (bus->number == (port->hose->first_busno + 1) && 1466 PCI_SLOT(devfn) != 0) 1467 return PCIBIOS_DEVICE_NOT_FOUND; 1468 1469 /* Check if we have a link */ 1470 if ((bus->number != port->hose->first_busno) && !port->link) 1471 return PCIBIOS_DEVICE_NOT_FOUND; 1472 1473 return 0; 1474 } 1475 1476 static void __iomem *ppc4xx_pciex_get_config_base(struct ppc4xx_pciex_port *port, 1477 struct pci_bus *bus, 1478 unsigned int devfn) 1479 { 1480 int relbus; 1481 1482 /* Remove the casts when we finally remove the stupid volatile 1483 * in struct pci_controller 1484 */ 1485 if (bus->number == port->hose->first_busno) 1486 return (void __iomem *)port->hose->cfg_addr; 1487 1488 relbus = bus->number - (port->hose->first_busno + 1); 1489 return (void __iomem *)port->hose->cfg_data + 1490 ((relbus << 20) | (devfn << 12)); 1491 } 1492 1493 static int ppc4xx_pciex_read_config(struct pci_bus *bus, unsigned int devfn, 1494 int offset, int len, u32 *val) 1495 { 1496 struct pci_controller *hose = pci_bus_to_host(bus); 1497 struct ppc4xx_pciex_port *port = 1498 &ppc4xx_pciex_ports[hose->indirect_type]; 1499 void __iomem *addr; 1500 u32 gpl_cfg; 1501 1502 BUG_ON(hose != port->hose); 1503 1504 if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0) 1505 return PCIBIOS_DEVICE_NOT_FOUND; 1506 1507 addr = ppc4xx_pciex_get_config_base(port, bus, devfn); 1508 1509 /* 1510 * Reading from configuration space of non-existing device can 1511 * generate transaction errors. For the read duration we suppress 1512 * assertion of machine check exceptions to avoid those. 1513 */ 1514 gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG); 1515 dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA); 1516 1517 /* Make sure no CRS is recorded */ 1518 out_be32(port->utl_base + PEUTL_RCSTA, 0x00040000); 1519 1520 switch (len) { 1521 case 1: 1522 *val = in_8((u8 *)(addr + offset)); 1523 break; 1524 case 2: 1525 *val = in_le16((u16 *)(addr + offset)); 1526 break; 1527 default: 1528 *val = in_le32((u32 *)(addr + offset)); 1529 break; 1530 } 1531 1532 pr_debug("pcie-config-read: bus=%3d [%3d..%3d] devfn=0x%04x" 1533 " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n", 1534 bus->number, hose->first_busno, hose->last_busno, 1535 devfn, offset, len, addr + offset, *val); 1536 1537 /* Check for CRS (440SPe rev B does that for us but heh ..) */ 1538 if (in_be32(port->utl_base + PEUTL_RCSTA) & 0x00040000) { 1539 pr_debug("Got CRS !\n"); 1540 if (len != 4 || offset != 0) 1541 return PCIBIOS_DEVICE_NOT_FOUND; 1542 *val = 0xffff0001; 1543 } 1544 1545 dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg); 1546 1547 return PCIBIOS_SUCCESSFUL; 1548 } 1549 1550 static int ppc4xx_pciex_write_config(struct pci_bus *bus, unsigned int devfn, 1551 int offset, int len, u32 val) 1552 { 1553 struct pci_controller *hose = pci_bus_to_host(bus); 1554 struct ppc4xx_pciex_port *port = 1555 &ppc4xx_pciex_ports[hose->indirect_type]; 1556 void __iomem *addr; 1557 u32 gpl_cfg; 1558 1559 if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0) 1560 return PCIBIOS_DEVICE_NOT_FOUND; 1561 1562 addr = ppc4xx_pciex_get_config_base(port, bus, devfn); 1563 1564 /* 1565 * Reading from configuration space of non-existing device can 1566 * generate transaction errors. For the read duration we suppress 1567 * assertion of machine check exceptions to avoid those. 1568 */ 1569 gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG); 1570 dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA); 1571 1572 pr_debug("pcie-config-write: bus=%3d [%3d..%3d] devfn=0x%04x" 1573 " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n", 1574 bus->number, hose->first_busno, hose->last_busno, 1575 devfn, offset, len, addr + offset, val); 1576 1577 switch (len) { 1578 case 1: 1579 out_8((u8 *)(addr + offset), val); 1580 break; 1581 case 2: 1582 out_le16((u16 *)(addr + offset), val); 1583 break; 1584 default: 1585 out_le32((u32 *)(addr + offset), val); 1586 break; 1587 } 1588 1589 dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg); 1590 1591 return PCIBIOS_SUCCESSFUL; 1592 } 1593 1594 static struct pci_ops ppc4xx_pciex_pci_ops = 1595 { 1596 .read = ppc4xx_pciex_read_config, 1597 .write = ppc4xx_pciex_write_config, 1598 }; 1599 1600 static int __init ppc4xx_setup_one_pciex_POM(struct ppc4xx_pciex_port *port, 1601 struct pci_controller *hose, 1602 void __iomem *mbase, 1603 u64 plb_addr, 1604 u64 pci_addr, 1605 u64 size, 1606 unsigned int flags, 1607 int index) 1608 { 1609 u32 lah, lal, pciah, pcial, sa; 1610 1611 if (!is_power_of_2(size) || 1612 (index < 2 && size < 0x100000) || 1613 (index == 2 && size < 0x100) || 1614 (plb_addr & (size - 1)) != 0) { 1615 printk(KERN_WARNING "%pOF: Resource out of range\n", hose->dn); 1616 return -1; 1617 } 1618 1619 /* Calculate register values */ 1620 lah = RES_TO_U32_HIGH(plb_addr); 1621 lal = RES_TO_U32_LOW(plb_addr); 1622 pciah = RES_TO_U32_HIGH(pci_addr); 1623 pcial = RES_TO_U32_LOW(pci_addr); 1624 sa = (0xffffffffu << ilog2(size)) | 0x1; 1625 1626 /* Program register values */ 1627 switch (index) { 1628 case 0: 1629 out_le32(mbase + PECFG_POM0LAH, pciah); 1630 out_le32(mbase + PECFG_POM0LAL, pcial); 1631 dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAH, lah); 1632 dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAL, lal); 1633 dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKH, 0x7fffffff); 1634 /*Enabled and single region */ 1635 if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx")) 1636 dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, 1637 sa | DCRO_PEGPL_460SX_OMR1MSKL_UOT 1638 | DCRO_PEGPL_OMRxMSKL_VAL); 1639 else if (of_device_is_compatible( 1640 port->node, "ibm,plb-pciex-476fpe") || 1641 of_device_is_compatible( 1642 port->node, "ibm,plb-pciex-476gtr")) 1643 dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, 1644 sa | DCRO_PEGPL_476FPE_OMR1MSKL_UOT 1645 | DCRO_PEGPL_OMRxMSKL_VAL); 1646 else 1647 dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, 1648 sa | DCRO_PEGPL_OMR1MSKL_UOT 1649 | DCRO_PEGPL_OMRxMSKL_VAL); 1650 break; 1651 case 1: 1652 out_le32(mbase + PECFG_POM1LAH, pciah); 1653 out_le32(mbase + PECFG_POM1LAL, pcial); 1654 dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAH, lah); 1655 dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAL, lal); 1656 dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKH, 0x7fffffff); 1657 dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, 1658 sa | DCRO_PEGPL_OMRxMSKL_VAL); 1659 break; 1660 case 2: 1661 out_le32(mbase + PECFG_POM2LAH, pciah); 1662 out_le32(mbase + PECFG_POM2LAL, pcial); 1663 dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAH, lah); 1664 dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAL, lal); 1665 dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKH, 0x7fffffff); 1666 /* Note that 3 here means enabled | IO space !!! */ 1667 dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, 1668 sa | DCRO_PEGPL_OMR3MSKL_IO 1669 | DCRO_PEGPL_OMRxMSKL_VAL); 1670 break; 1671 } 1672 1673 return 0; 1674 } 1675 1676 static void __init ppc4xx_configure_pciex_POMs(struct ppc4xx_pciex_port *port, 1677 struct pci_controller *hose, 1678 void __iomem *mbase) 1679 { 1680 int i, j, found_isa_hole = 0; 1681 1682 /* Setup outbound memory windows */ 1683 for (i = j = 0; i < 3; i++) { 1684 struct resource *res = &hose->mem_resources[i]; 1685 resource_size_t offset = hose->mem_offset[i]; 1686 1687 /* we only care about memory windows */ 1688 if (!(res->flags & IORESOURCE_MEM)) 1689 continue; 1690 if (j > 1) { 1691 printk(KERN_WARNING "%pOF: Too many ranges\n", 1692 port->node); 1693 break; 1694 } 1695 1696 /* Configure the resource */ 1697 if (ppc4xx_setup_one_pciex_POM(port, hose, mbase, 1698 res->start, 1699 res->start - offset, 1700 resource_size(res), 1701 res->flags, 1702 j) == 0) { 1703 j++; 1704 1705 /* If the resource PCI address is 0 then we have our 1706 * ISA memory hole 1707 */ 1708 if (res->start == offset) 1709 found_isa_hole = 1; 1710 } 1711 } 1712 1713 /* Handle ISA memory hole if not already covered */ 1714 if (j <= 1 && !found_isa_hole && hose->isa_mem_size) 1715 if (ppc4xx_setup_one_pciex_POM(port, hose, mbase, 1716 hose->isa_mem_phys, 0, 1717 hose->isa_mem_size, 0, j) == 0) 1718 printk(KERN_INFO "%pOF: Legacy ISA memory support enabled\n", 1719 hose->dn); 1720 1721 /* Configure IO, always 64K starting at 0. We hard wire it to 64K ! 1722 * Note also that it -has- to be region index 2 on this HW 1723 */ 1724 if (hose->io_resource.flags & IORESOURCE_IO) 1725 ppc4xx_setup_one_pciex_POM(port, hose, mbase, 1726 hose->io_base_phys, 0, 1727 0x10000, IORESOURCE_IO, 2); 1728 } 1729 1730 static void __init ppc4xx_configure_pciex_PIMs(struct ppc4xx_pciex_port *port, 1731 struct pci_controller *hose, 1732 void __iomem *mbase, 1733 struct resource *res) 1734 { 1735 resource_size_t size = resource_size(res); 1736 u64 sa; 1737 1738 if (port->endpoint) { 1739 resource_size_t ep_addr = 0; 1740 resource_size_t ep_size = 32 << 20; 1741 1742 /* Currently we map a fixed 64MByte window to PLB address 1743 * 0 (SDRAM). This should probably be configurable via a dts 1744 * property. 1745 */ 1746 1747 /* Calculate window size */ 1748 sa = (0xffffffffffffffffull << ilog2(ep_size)); 1749 1750 /* Setup BAR0 */ 1751 out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa)); 1752 out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa) | 1753 PCI_BASE_ADDRESS_MEM_TYPE_64); 1754 1755 /* Disable BAR1 & BAR2 */ 1756 out_le32(mbase + PECFG_BAR1MPA, 0); 1757 out_le32(mbase + PECFG_BAR2HMPA, 0); 1758 out_le32(mbase + PECFG_BAR2LMPA, 0); 1759 1760 out_le32(mbase + PECFG_PIM01SAH, RES_TO_U32_HIGH(sa)); 1761 out_le32(mbase + PECFG_PIM01SAL, RES_TO_U32_LOW(sa)); 1762 1763 out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(ep_addr)); 1764 out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(ep_addr)); 1765 } else { 1766 /* Calculate window size */ 1767 sa = (0xffffffffffffffffull << ilog2(size)); 1768 if (res->flags & IORESOURCE_PREFETCH) 1769 sa |= PCI_BASE_ADDRESS_MEM_PREFETCH; 1770 1771 if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx") || 1772 of_device_is_compatible( 1773 port->node, "ibm,plb-pciex-476fpe") || 1774 of_device_is_compatible( 1775 port->node, "ibm,plb-pciex-476gtr")) 1776 sa |= PCI_BASE_ADDRESS_MEM_TYPE_64; 1777 1778 out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa)); 1779 out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa)); 1780 1781 /* The setup of the split looks weird to me ... let's see 1782 * if it works 1783 */ 1784 out_le32(mbase + PECFG_PIM0LAL, 0x00000000); 1785 out_le32(mbase + PECFG_PIM0LAH, 0x00000000); 1786 out_le32(mbase + PECFG_PIM1LAL, 0x00000000); 1787 out_le32(mbase + PECFG_PIM1LAH, 0x00000000); 1788 out_le32(mbase + PECFG_PIM01SAH, 0xffff0000); 1789 out_le32(mbase + PECFG_PIM01SAL, 0x00000000); 1790 1791 out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(res->start)); 1792 out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(res->start)); 1793 } 1794 1795 /* Enable inbound mapping */ 1796 out_le32(mbase + PECFG_PIMEN, 0x1); 1797 1798 /* Enable I/O, Mem, and Busmaster cycles */ 1799 out_le16(mbase + PCI_COMMAND, 1800 in_le16(mbase + PCI_COMMAND) | 1801 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 1802 } 1803 1804 static void __init ppc4xx_pciex_port_setup_hose(struct ppc4xx_pciex_port *port) 1805 { 1806 struct resource dma_window; 1807 struct pci_controller *hose = NULL; 1808 const int *bus_range; 1809 int primary, busses; 1810 void __iomem *mbase = NULL, *cfg_data = NULL; 1811 const u32 *pval; 1812 u32 val; 1813 1814 /* Check if primary bridge */ 1815 primary = of_property_read_bool(port->node, "primary"); 1816 1817 /* Get bus range if any */ 1818 bus_range = of_get_property(port->node, "bus-range", NULL); 1819 1820 /* Allocate the host controller data structure */ 1821 hose = pcibios_alloc_controller(port->node); 1822 if (!hose) 1823 goto fail; 1824 1825 /* We stick the port number in "indirect_type" so the config space 1826 * ops can retrieve the port data structure easily 1827 */ 1828 hose->indirect_type = port->index; 1829 1830 /* Get bus range */ 1831 hose->first_busno = bus_range ? bus_range[0] : 0x0; 1832 hose->last_busno = bus_range ? bus_range[1] : 0xff; 1833 1834 /* Because of how big mapping the config space is (1M per bus), we 1835 * limit how many busses we support. In the long run, we could replace 1836 * that with something akin to kmap_atomic instead. We set aside 1 bus 1837 * for the host itself too. 1838 */ 1839 busses = hose->last_busno - hose->first_busno; /* This is off by 1 */ 1840 if (busses > MAX_PCIE_BUS_MAPPED) { 1841 busses = MAX_PCIE_BUS_MAPPED; 1842 hose->last_busno = hose->first_busno + busses; 1843 } 1844 1845 if (!port->endpoint) { 1846 /* Only map the external config space in cfg_data for 1847 * PCIe root-complexes. External space is 1M per bus 1848 */ 1849 cfg_data = ioremap(port->cfg_space.start + 1850 (hose->first_busno + 1) * 0x100000, 1851 busses * 0x100000); 1852 if (cfg_data == NULL) { 1853 printk(KERN_ERR "%pOF: Can't map external config space !", 1854 port->node); 1855 goto fail; 1856 } 1857 hose->cfg_data = cfg_data; 1858 } 1859 1860 /* Always map the host config space in cfg_addr. 1861 * Internal space is 4K 1862 */ 1863 mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000); 1864 if (mbase == NULL) { 1865 printk(KERN_ERR "%pOF: Can't map internal config space !", 1866 port->node); 1867 goto fail; 1868 } 1869 hose->cfg_addr = mbase; 1870 1871 pr_debug("PCIE %pOF, bus %d..%d\n", port->node, 1872 hose->first_busno, hose->last_busno); 1873 pr_debug(" config space mapped at: root @0x%p, other @0x%p\n", 1874 hose->cfg_addr, hose->cfg_data); 1875 1876 /* Setup config space */ 1877 hose->ops = &ppc4xx_pciex_pci_ops; 1878 port->hose = hose; 1879 mbase = (void __iomem *)hose->cfg_addr; 1880 1881 if (!port->endpoint) { 1882 /* 1883 * Set bus numbers on our root port 1884 */ 1885 out_8(mbase + PCI_PRIMARY_BUS, hose->first_busno); 1886 out_8(mbase + PCI_SECONDARY_BUS, hose->first_busno + 1); 1887 out_8(mbase + PCI_SUBORDINATE_BUS, hose->last_busno); 1888 } 1889 1890 /* 1891 * OMRs are already reset, also disable PIMs 1892 */ 1893 out_le32(mbase + PECFG_PIMEN, 0); 1894 1895 /* Parse outbound mapping resources */ 1896 pci_process_bridge_OF_ranges(hose, port->node, primary); 1897 1898 /* Parse inbound mapping resources */ 1899 if (ppc4xx_parse_dma_ranges(hose, mbase, &dma_window) != 0) 1900 goto fail; 1901 1902 /* Configure outbound ranges POMs */ 1903 ppc4xx_configure_pciex_POMs(port, hose, mbase); 1904 1905 /* Configure inbound ranges PIMs */ 1906 ppc4xx_configure_pciex_PIMs(port, hose, mbase, &dma_window); 1907 1908 /* The root complex doesn't show up if we don't set some vendor 1909 * and device IDs into it. The defaults below are the same bogus 1910 * one that the initial code in arch/ppc had. This can be 1911 * overwritten by setting the "vendor-id/device-id" properties 1912 * in the pciex node. 1913 */ 1914 1915 /* Get the (optional) vendor-/device-id from the device-tree */ 1916 pval = of_get_property(port->node, "vendor-id", NULL); 1917 if (pval) { 1918 val = *pval; 1919 } else { 1920 if (!port->endpoint) 1921 val = 0xaaa0 + port->index; 1922 else 1923 val = 0xeee0 + port->index; 1924 } 1925 out_le16(mbase + 0x200, val); 1926 1927 pval = of_get_property(port->node, "device-id", NULL); 1928 if (pval) { 1929 val = *pval; 1930 } else { 1931 if (!port->endpoint) 1932 val = 0xbed0 + port->index; 1933 else 1934 val = 0xfed0 + port->index; 1935 } 1936 out_le16(mbase + 0x202, val); 1937 1938 /* Enable Bus master, memory, and io space */ 1939 if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx")) 1940 out_le16(mbase + 0x204, 0x7); 1941 1942 if (!port->endpoint) { 1943 /* Set Class Code to PCI-PCI bridge and Revision Id to 1 */ 1944 out_le32(mbase + 0x208, 0x06040001); 1945 1946 printk(KERN_INFO "PCIE%d: successfully set as root-complex\n", 1947 port->index); 1948 } else { 1949 /* Set Class Code to Processor/PPC */ 1950 out_le32(mbase + 0x208, 0x0b200001); 1951 1952 printk(KERN_INFO "PCIE%d: successfully set as endpoint\n", 1953 port->index); 1954 } 1955 1956 return; 1957 fail: 1958 if (hose) 1959 pcibios_free_controller(hose); 1960 if (cfg_data) 1961 iounmap(cfg_data); 1962 if (mbase) 1963 iounmap(mbase); 1964 } 1965 1966 static void __init ppc4xx_probe_pciex_bridge(struct device_node *np) 1967 { 1968 struct ppc4xx_pciex_port *port; 1969 const u32 *pval; 1970 int portno; 1971 unsigned int dcrs; 1972 1973 /* First, proceed to core initialization as we assume there's 1974 * only one PCIe core in the system 1975 */ 1976 if (ppc4xx_pciex_check_core_init(np)) 1977 return; 1978 1979 /* Get the port number from the device-tree */ 1980 pval = of_get_property(np, "port", NULL); 1981 if (pval == NULL) { 1982 printk(KERN_ERR "PCIE: Can't find port number for %pOF\n", np); 1983 return; 1984 } 1985 portno = *pval; 1986 if (portno >= ppc4xx_pciex_port_count) { 1987 printk(KERN_ERR "PCIE: port number out of range for %pOF\n", 1988 np); 1989 return; 1990 } 1991 port = &ppc4xx_pciex_ports[portno]; 1992 port->index = portno; 1993 1994 /* 1995 * Check if device is enabled 1996 */ 1997 if (!of_device_is_available(np)) { 1998 printk(KERN_INFO "PCIE%d: Port disabled via device-tree\n", port->index); 1999 return; 2000 } 2001 2002 port->node = of_node_get(np); 2003 if (ppc4xx_pciex_hwops->want_sdr) { 2004 pval = of_get_property(np, "sdr-base", NULL); 2005 if (pval == NULL) { 2006 printk(KERN_ERR "PCIE: missing sdr-base for %pOF\n", 2007 np); 2008 return; 2009 } 2010 port->sdr_base = *pval; 2011 } 2012 2013 /* Check if device_type property is set to "pci" or "pci-endpoint". 2014 * Resulting from this setup this PCIe port will be configured 2015 * as root-complex or as endpoint. 2016 */ 2017 if (of_node_is_type(port->node, "pci-endpoint")) { 2018 port->endpoint = 1; 2019 } else if (of_node_is_type(port->node, "pci")) { 2020 port->endpoint = 0; 2021 } else { 2022 printk(KERN_ERR "PCIE: missing or incorrect device_type for %pOF\n", 2023 np); 2024 return; 2025 } 2026 2027 /* Fetch config space registers address */ 2028 if (of_address_to_resource(np, 0, &port->cfg_space)) { 2029 printk(KERN_ERR "%pOF: Can't get PCI-E config space !", np); 2030 return; 2031 } 2032 /* Fetch host bridge internal registers address */ 2033 if (of_address_to_resource(np, 1, &port->utl_regs)) { 2034 printk(KERN_ERR "%pOF: Can't get UTL register base !", np); 2035 return; 2036 } 2037 2038 /* Map DCRs */ 2039 dcrs = dcr_resource_start(np, 0); 2040 if (dcrs == 0) { 2041 printk(KERN_ERR "%pOF: Can't get DCR register base !", np); 2042 return; 2043 } 2044 port->dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0)); 2045 2046 /* Initialize the port specific registers */ 2047 if (ppc4xx_pciex_port_init(port)) { 2048 printk(KERN_WARNING "PCIE%d: Port init failed\n", port->index); 2049 return; 2050 } 2051 2052 /* Setup the linux hose data structure */ 2053 ppc4xx_pciex_port_setup_hose(port); 2054 } 2055 2056 #endif /* CONFIG_PPC4xx_PCI_EXPRESS */ 2057 2058 static int __init ppc4xx_pci_find_bridges(void) 2059 { 2060 struct device_node *np; 2061 2062 pci_add_flags(PCI_ENABLE_PROC_DOMAINS | PCI_COMPAT_DOMAIN_0); 2063 2064 #ifdef CONFIG_PPC4xx_PCI_EXPRESS 2065 for_each_compatible_node(np, NULL, "ibm,plb-pciex") 2066 ppc4xx_probe_pciex_bridge(np); 2067 #endif 2068 for_each_compatible_node(np, NULL, "ibm,plb-pcix") 2069 ppc4xx_probe_pcix_bridge(np); 2070 for_each_compatible_node(np, NULL, "ibm,plb-pci") 2071 ppc4xx_probe_pci_bridge(np); 2072 2073 return 0; 2074 } 2075 arch_initcall(ppc4xx_pci_find_bridges); 2076 2077