2 * PCI / PCI-X / PCI-Express support for 4xx parts
4 * Copyright 2007 Ben. Herrenschmidt <benh@kernel.crashing.org>, IBM Corp.
6 * Most PCI Express code is coming from Stefan Roese implementation for
7 * arch/ppc in the Denx tree, slightly reworked by me.
9 * Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de>
11 * Some of that comes itself from a previous implementation for 440SPE only
14 * Copyright (c) 2005 Cisco Systems. All rights reserved.
15 * Roland Dreier <rolandd@cisco.com>
21 #include <linux/kernel.h>
22 #include <linux/pci.h>
23 #include <linux/init.h>
25 #include <linux/bootmem.h>
26 #include <linux/delay.h>
29 #include <asm/pci-bridge.h>
30 #include <asm/machdep.h>
32 #include <asm/dcr-regs.h>
34 #include "ppc4xx_pci.h"
36 static int dma_offset_set;
38 /* Move that to a useable header */
39 extern unsigned long total_memory;
41 #define U64_TO_U32_LOW(val) ((u32)((val) & 0x00000000ffffffffULL))
42 #define U64_TO_U32_HIGH(val) ((u32)((val) >> 32))
44 #ifdef CONFIG_RESOURCES_64BIT
45 #define RES_TO_U32_LOW(val) U64_TO_U32_LOW(val)
46 #define RES_TO_U32_HIGH(val) U64_TO_U32_HIGH(val)
48 #define RES_TO_U32_LOW(val) (val)
49 #define RES_TO_U32_HIGH(val) (0)
52 static inline int ppc440spe_revA(void)
54 /* Catch both 440SPe variants, with and without RAID6 support */
55 if ((mfspr(SPRN_PVR) & 0xffefffff) == 0x53421890)
61 static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev)
63 struct pci_controller *hose;
66 if (dev->devfn != 0 || dev->bus->self != NULL)
69 hose = pci_bus_to_host(dev->bus);
73 if (!of_device_is_compatible(hose->dn, "ibm,plb-pciex") &&
74 !of_device_is_compatible(hose->dn, "ibm,plb-pcix") &&
75 !of_device_is_compatible(hose->dn, "ibm,plb-pci"))
78 /* Hide the PCI host BARs from the kernel as their content doesn't
79 * fit well in the resource management
81 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
82 dev->resource[i].start = dev->resource[i].end = 0;
83 dev->resource[i].flags = 0;
86 printk(KERN_INFO "PCI: Hiding 4xx host bridge resources %s\n",
89 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, fixup_ppc4xx_pci_bridge);
91 static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose,
98 int pna = of_n_addr_cells(hose->dn);
103 res->end = size = 0x80000000;
104 res->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH;
106 /* Get dma-ranges property */
107 ranges = of_get_property(hose->dn, "dma-ranges", &rlen);
112 while ((rlen -= np * 4) >= 0) {
113 u32 pci_space = ranges[0];
114 u64 pci_addr = of_read_number(ranges + 1, 2);
115 u64 cpu_addr = of_translate_dma_address(hose->dn, ranges + 3);
116 size = of_read_number(ranges + pna + 3, 2);
118 if (cpu_addr == OF_BAD_ADDR || size == 0)
121 /* We only care about memory */
122 if ((pci_space & 0x03000000) != 0x02000000)
125 /* We currently only support memory at 0, and pci_addr
126 * within 32 bits space
128 if (cpu_addr != 0 || pci_addr > 0xffffffff) {
129 printk(KERN_WARNING "%s: Ignored unsupported dma range"
130 " 0x%016llx...0x%016llx -> 0x%016llx\n",
132 pci_addr, pci_addr + size - 1, cpu_addr);
136 /* Check if not prefetchable */
137 if (!(pci_space & 0x40000000))
138 res->flags &= ~IORESOURCE_PREFETCH;
142 res->start = pci_addr;
143 #ifndef CONFIG_RESOURCES_64BIT
144 /* Beware of 32 bits resources */
145 if ((pci_addr + size) > 0x100000000ull)
146 res->end = 0xffffffff;
149 res->end = res->start + size - 1;
153 /* We only support one global DMA offset */
154 if (dma_offset_set && pci_dram_offset != res->start) {
155 printk(KERN_ERR "%s: dma-ranges(s) mismatch\n",
156 hose->dn->full_name);
160 /* Check that we can fit all of memory as we don't support
163 if (size < total_memory) {
164 printk(KERN_ERR "%s: dma-ranges too small "
165 "(size=%llx total_memory=%lx)\n",
166 hose->dn->full_name, size, total_memory);
170 /* Check we are a power of 2 size and that base is a multiple of size*/
171 if (!is_power_of_2(size) ||
172 (res->start & (size - 1)) != 0) {
173 printk(KERN_ERR "%s: dma-ranges unaligned\n",
174 hose->dn->full_name);
178 /* Check that we are fully contained within 32 bits space */
179 if (res->end > 0xffffffff) {
180 printk(KERN_ERR "%s: dma-ranges outside of 32 bits space\n",
181 hose->dn->full_name);
186 pci_dram_offset = res->start;
188 printk(KERN_INFO "4xx PCI DMA offset set to 0x%08lx\n",
197 static void __init ppc4xx_configure_pci_PMMs(struct pci_controller *hose,
200 u32 la, ma, pcila, pciha;
203 /* Setup outbound memory windows */
204 for (i = j = 0; i < 3; i++) {
205 struct resource *res = &hose->mem_resources[i];
207 /* we only care about memory windows */
208 if (!(res->flags & IORESOURCE_MEM))
211 printk(KERN_WARNING "%s: Too many ranges\n",
212 hose->dn->full_name);
216 /* Calculate register values */
218 pciha = RES_TO_U32_HIGH(res->start - hose->pci_mem_offset);
219 pcila = RES_TO_U32_LOW(res->start - hose->pci_mem_offset);
221 ma = res->end + 1 - res->start;
222 if (!is_power_of_2(ma) || ma < 0x1000 || ma > 0xffffffffu) {
223 printk(KERN_WARNING "%s: Resource out of range\n",
224 hose->dn->full_name);
227 ma = (0xffffffffu << ilog2(ma)) | 0x1;
228 if (res->flags & IORESOURCE_PREFETCH)
231 /* Program register values */
232 writel(la, reg + PCIL0_PMM0LA + (0x10 * j));
233 writel(pcila, reg + PCIL0_PMM0PCILA + (0x10 * j));
234 writel(pciha, reg + PCIL0_PMM0PCIHA + (0x10 * j));
235 writel(ma, reg + PCIL0_PMM0MA + (0x10 * j));
240 static void __init ppc4xx_configure_pci_PTMs(struct pci_controller *hose,
242 const struct resource *res)
244 resource_size_t size = res->end - res->start + 1;
247 /* Calculate window size */
248 sa = (0xffffffffu << ilog2(size)) | 1;
251 /* RAM is always at 0 local for now */
252 writel(0, reg + PCIL0_PTM1LA);
253 writel(sa, reg + PCIL0_PTM1MS);
255 /* Map on PCI side */
256 early_write_config_dword(hose, hose->first_busno, 0,
257 PCI_BASE_ADDRESS_1, res->start);
258 early_write_config_dword(hose, hose->first_busno, 0,
259 PCI_BASE_ADDRESS_2, 0x00000000);
260 early_write_config_word(hose, hose->first_busno, 0,
261 PCI_COMMAND, 0x0006);
264 static void __init ppc4xx_probe_pci_bridge(struct device_node *np)
267 struct resource rsrc_cfg;
268 struct resource rsrc_reg;
269 struct resource dma_window;
270 struct pci_controller *hose = NULL;
271 void __iomem *reg = NULL;
272 const int *bus_range;
275 /* Fetch config space registers address */
276 if (of_address_to_resource(np, 0, &rsrc_cfg)) {
277 printk(KERN_ERR "%s:Can't get PCI config register base !",
281 /* Fetch host bridge internal registers address */
282 if (of_address_to_resource(np, 3, &rsrc_reg)) {
283 printk(KERN_ERR "%s: Can't get PCI internal register base !",
288 /* Check if primary bridge */
289 if (of_get_property(np, "primary", NULL))
292 /* Get bus range if any */
293 bus_range = of_get_property(np, "bus-range", NULL);
296 reg = ioremap(rsrc_reg.start, rsrc_reg.end + 1 - rsrc_reg.start);
298 printk(KERN_ERR "%s: Can't map registers !", np->full_name);
302 /* Allocate the host controller data structure */
303 hose = pcibios_alloc_controller(np);
307 hose->first_busno = bus_range ? bus_range[0] : 0x0;
308 hose->last_busno = bus_range ? bus_range[1] : 0xff;
310 /* Setup config space */
311 setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0);
313 /* Disable all windows */
314 writel(0, reg + PCIL0_PMM0MA);
315 writel(0, reg + PCIL0_PMM1MA);
316 writel(0, reg + PCIL0_PMM2MA);
317 writel(0, reg + PCIL0_PTM1MS);
318 writel(0, reg + PCIL0_PTM2MS);
320 /* Parse outbound mapping resources */
321 pci_process_bridge_OF_ranges(hose, np, primary);
323 /* Parse inbound mapping resources */
324 if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0)
327 /* Configure outbound ranges POMs */
328 ppc4xx_configure_pci_PMMs(hose, reg);
330 /* Configure inbound ranges PIMs */
331 ppc4xx_configure_pci_PTMs(hose, reg, &dma_window);
333 /* We don't need the registers anymore */
339 pcibios_free_controller(hose);
348 static void __init ppc4xx_configure_pcix_POMs(struct pci_controller *hose,
351 u32 lah, lal, pciah, pcial, sa;
354 /* Setup outbound memory windows */
355 for (i = j = 0; i < 3; i++) {
356 struct resource *res = &hose->mem_resources[i];
358 /* we only care about memory windows */
359 if (!(res->flags & IORESOURCE_MEM))
362 printk(KERN_WARNING "%s: Too many ranges\n",
363 hose->dn->full_name);
367 /* Calculate register values */
368 lah = RES_TO_U32_HIGH(res->start);
369 lal = RES_TO_U32_LOW(res->start);
370 pciah = RES_TO_U32_HIGH(res->start - hose->pci_mem_offset);
371 pcial = RES_TO_U32_LOW(res->start - hose->pci_mem_offset);
372 sa = res->end + 1 - res->start;
373 if (!is_power_of_2(sa) || sa < 0x100000 ||
375 printk(KERN_WARNING "%s: Resource out of range\n",
376 hose->dn->full_name);
379 sa = (0xffffffffu << ilog2(sa)) | 0x1;
381 /* Program register values */
383 writel(lah, reg + PCIX0_POM0LAH);
384 writel(lal, reg + PCIX0_POM0LAL);
385 writel(pciah, reg + PCIX0_POM0PCIAH);
386 writel(pcial, reg + PCIX0_POM0PCIAL);
387 writel(sa, reg + PCIX0_POM0SA);
389 writel(lah, reg + PCIX0_POM1LAH);
390 writel(lal, reg + PCIX0_POM1LAL);
391 writel(pciah, reg + PCIX0_POM1PCIAH);
392 writel(pcial, reg + PCIX0_POM1PCIAL);
393 writel(sa, reg + PCIX0_POM1SA);
399 static void __init ppc4xx_configure_pcix_PIMs(struct pci_controller *hose,
401 const struct resource *res,
405 resource_size_t size = res->end - res->start + 1;
408 /* RAM is always at 0 */
409 writel(0x00000000, reg + PCIX0_PIM0LAH);
410 writel(0x00000000, reg + PCIX0_PIM0LAL);
412 /* Calculate window size */
413 sa = (0xffffffffu << ilog2(size)) | 1;
415 if (res->flags & IORESOURCE_PREFETCH)
419 writel(sa, reg + PCIX0_PIM0SA);
421 writel(0xffffffff, reg + PCIX0_PIM0SAH);
423 /* Map on PCI side */
424 writel(0x00000000, reg + PCIX0_BAR0H);
425 writel(res->start, reg + PCIX0_BAR0L);
426 writew(0x0006, reg + PCIX0_COMMAND);
429 static void __init ppc4xx_probe_pcix_bridge(struct device_node *np)
431 struct resource rsrc_cfg;
432 struct resource rsrc_reg;
433 struct resource dma_window;
434 struct pci_controller *hose = NULL;
435 void __iomem *reg = NULL;
436 const int *bus_range;
437 int big_pim = 0, msi = 0, primary = 0;
439 /* Fetch config space registers address */
440 if (of_address_to_resource(np, 0, &rsrc_cfg)) {
441 printk(KERN_ERR "%s:Can't get PCI-X config register base !",
445 /* Fetch host bridge internal registers address */
446 if (of_address_to_resource(np, 3, &rsrc_reg)) {
447 printk(KERN_ERR "%s: Can't get PCI-X internal register base !",
452 /* Check if it supports large PIMs (440GX) */
453 if (of_get_property(np, "large-inbound-windows", NULL))
456 /* Check if we should enable MSIs inbound hole */
457 if (of_get_property(np, "enable-msi-hole", NULL))
460 /* Check if primary bridge */
461 if (of_get_property(np, "primary", NULL))
464 /* Get bus range if any */
465 bus_range = of_get_property(np, "bus-range", NULL);
468 reg = ioremap(rsrc_reg.start, rsrc_reg.end + 1 - rsrc_reg.start);
470 printk(KERN_ERR "%s: Can't map registers !", np->full_name);
474 /* Allocate the host controller data structure */
475 hose = pcibios_alloc_controller(np);
479 hose->first_busno = bus_range ? bus_range[0] : 0x0;
480 hose->last_busno = bus_range ? bus_range[1] : 0xff;
482 /* Setup config space */
483 setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0);
485 /* Disable all windows */
486 writel(0, reg + PCIX0_POM0SA);
487 writel(0, reg + PCIX0_POM1SA);
488 writel(0, reg + PCIX0_POM2SA);
489 writel(0, reg + PCIX0_PIM0SA);
490 writel(0, reg + PCIX0_PIM1SA);
491 writel(0, reg + PCIX0_PIM2SA);
493 writel(0, reg + PCIX0_PIM0SAH);
494 writel(0, reg + PCIX0_PIM2SAH);
497 /* Parse outbound mapping resources */
498 pci_process_bridge_OF_ranges(hose, np, primary);
500 /* Parse inbound mapping resources */
501 if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0)
504 /* Configure outbound ranges POMs */
505 ppc4xx_configure_pcix_POMs(hose, reg);
507 /* Configure inbound ranges PIMs */
508 ppc4xx_configure_pcix_PIMs(hose, reg, &dma_window, big_pim, msi);
510 /* We don't need the registers anymore */
516 pcibios_free_controller(hose);
521 #ifdef CONFIG_PPC4xx_PCI_EXPRESS
524 * 4xx PCI-Express part
526 * We support 3 parts currently based on the compatible property:
528 * ibm,plb-pciex-440spe
529 * ibm,plb-pciex-405ex
531 * Anything else will be rejected for now as they are all subtly
532 * different unfortunately.
536 #define MAX_PCIE_BUS_MAPPED 0x10
538 struct ppc4xx_pciex_port
540 struct pci_controller *hose;
541 struct device_node *node;
546 unsigned int sdr_base;
548 struct resource cfg_space;
549 struct resource utl_regs;
550 void __iomem *utl_base;
553 static struct ppc4xx_pciex_port *ppc4xx_pciex_ports;
554 static unsigned int ppc4xx_pciex_port_count;
556 struct ppc4xx_pciex_hwops
558 int (*core_init)(struct device_node *np);
559 int (*port_init_hw)(struct ppc4xx_pciex_port *port);
560 int (*setup_utl)(struct ppc4xx_pciex_port *port);
563 static struct ppc4xx_pciex_hwops *ppc4xx_pciex_hwops;
567 /* Check various reset bits of the 440SPe PCIe core */
568 static int __init ppc440spe_pciex_check_reset(struct device_node *np)
570 u32 valPE0, valPE1, valPE2;
573 /* SDR0_PEGPLLLCT1 reset */
574 if (!(mfdcri(SDR0, PESDR0_PLLLCT1) & 0x01000000)) {
576 * the PCIe core was probably already initialised
577 * by firmware - let's re-reset RCSSET regs
579 * -- Shouldn't we also re-reset the whole thing ? -- BenH
581 pr_debug("PCIE: SDR0_PLLLCT1 already reset.\n");
582 mtdcri(SDR0, PESDR0_440SPE_RCSSET, 0x01010000);
583 mtdcri(SDR0, PESDR1_440SPE_RCSSET, 0x01010000);
584 mtdcri(SDR0, PESDR2_440SPE_RCSSET, 0x01010000);
587 valPE0 = mfdcri(SDR0, PESDR0_440SPE_RCSSET);
588 valPE1 = mfdcri(SDR0, PESDR1_440SPE_RCSSET);
589 valPE2 = mfdcri(SDR0, PESDR2_440SPE_RCSSET);
591 /* SDR0_PExRCSSET rstgu */
592 if (!(valPE0 & 0x01000000) ||
593 !(valPE1 & 0x01000000) ||
594 !(valPE2 & 0x01000000)) {
595 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstgu error\n");
599 /* SDR0_PExRCSSET rstdl */
600 if (!(valPE0 & 0x00010000) ||
601 !(valPE1 & 0x00010000) ||
602 !(valPE2 & 0x00010000)) {
603 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstdl error\n");
607 /* SDR0_PExRCSSET rstpyn */
608 if ((valPE0 & 0x00001000) ||
609 (valPE1 & 0x00001000) ||
610 (valPE2 & 0x00001000)) {
611 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstpyn error\n");
615 /* SDR0_PExRCSSET hldplb */
616 if ((valPE0 & 0x10000000) ||
617 (valPE1 & 0x10000000) ||
618 (valPE2 & 0x10000000)) {
619 printk(KERN_INFO "PCIE: SDR0_PExRCSSET hldplb error\n");
623 /* SDR0_PExRCSSET rdy */
624 if ((valPE0 & 0x00100000) ||
625 (valPE1 & 0x00100000) ||
626 (valPE2 & 0x00100000)) {
627 printk(KERN_INFO "PCIE: SDR0_PExRCSSET rdy error\n");
631 /* SDR0_PExRCSSET shutdown */
632 if ((valPE0 & 0x00000100) ||
633 (valPE1 & 0x00000100) ||
634 (valPE2 & 0x00000100)) {
635 printk(KERN_INFO "PCIE: SDR0_PExRCSSET shutdown error\n");
642 /* Global PCIe core initializations for 440SPe core */
643 static int __init ppc440spe_pciex_core_init(struct device_node *np)
647 /* Set PLL clock receiver to LVPECL */
648 mtdcri(SDR0, PESDR0_PLLLCT1, mfdcri(SDR0, PESDR0_PLLLCT1) | 1 << 28);
650 /* Shouldn't we do all the calibration stuff etc... here ? */
651 if (ppc440spe_pciex_check_reset(np))
654 if (!(mfdcri(SDR0, PESDR0_PLLLCT2) & 0x10000)) {
655 printk(KERN_INFO "PCIE: PESDR_PLLCT2 resistance calibration "
657 mfdcri(SDR0, PESDR0_PLLLCT2));
661 /* De-assert reset of PCIe PLL, wait for lock */
662 mtdcri(SDR0, PESDR0_PLLLCT1,
663 mfdcri(SDR0, PESDR0_PLLLCT1) & ~(1 << 24));
667 if (!(mfdcri(SDR0, PESDR0_PLLLCT3) & 0x10000000)) {
674 printk(KERN_INFO "PCIE: VCO output not locked\n");
678 pr_debug("PCIE initialization OK\n");
683 static int ppc440spe_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
688 val = PTYPE_LEGACY_ENDPOINT << 20;
690 val = PTYPE_ROOT_PORT << 20;
692 if (port->index == 0)
693 val |= LNKW_X8 << 12;
695 val |= LNKW_X4 << 12;
697 mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val);
698 mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x20222222);
699 if (ppc440spe_revA())
700 mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x11000000);
701 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL0SET1, 0x35000000);
702 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL1SET1, 0x35000000);
703 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL2SET1, 0x35000000);
704 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL3SET1, 0x35000000);
705 if (port->index == 0) {
706 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL4SET1,
708 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL5SET1,
710 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL6SET1,
712 mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL7SET1,
715 val = mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET);
716 mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET,
717 (val & ~(1 << 24 | 1 << 16)) | 1 << 12);
722 static int ppc440speA_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
724 return ppc440spe_pciex_init_port_hw(port);
727 static int ppc440speB_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
729 int rc = ppc440spe_pciex_init_port_hw(port);
736 static int ppc440speA_pciex_init_utl(struct ppc4xx_pciex_port *port)
738 /* XXX Check what that value means... I hate magic */
739 dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x68782800);
742 * Set buffer allocations and then assert VRB and TXE.
744 out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000);
745 out_be32(port->utl_base + PEUTL_INTR, 0x02000000);
746 out_be32(port->utl_base + PEUTL_OPDBSZ, 0x10000000);
747 out_be32(port->utl_base + PEUTL_PBBSZ, 0x53000000);
748 out_be32(port->utl_base + PEUTL_IPHBSZ, 0x08000000);
749 out_be32(port->utl_base + PEUTL_IPDBSZ, 0x10000000);
750 out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000);
751 out_be32(port->utl_base + PEUTL_PCTL, 0x80800066);
756 static int ppc440speB_pciex_init_utl(struct ppc4xx_pciex_port *port)
758 /* Report CRS to the operating system */
759 out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000);
764 static struct ppc4xx_pciex_hwops ppc440speA_pcie_hwops __initdata =
766 .core_init = ppc440spe_pciex_core_init,
767 .port_init_hw = ppc440speA_pciex_init_port_hw,
768 .setup_utl = ppc440speA_pciex_init_utl,
771 static struct ppc4xx_pciex_hwops ppc440speB_pcie_hwops __initdata =
773 .core_init = ppc440spe_pciex_core_init,
774 .port_init_hw = ppc440speB_pciex_init_port_hw,
775 .setup_utl = ppc440speB_pciex_init_utl,
778 #endif /* CONFIG_44x */
782 static int __init ppc405ex_pciex_core_init(struct device_node *np)
784 /* Nothing to do, return 2 ports */
788 static void ppc405ex_pcie_phy_reset(struct ppc4xx_pciex_port *port)
790 /* Assert the PE0_PHY reset */
791 mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01010000);
794 /* deassert the PE0_hotreset */
796 mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01111000);
798 mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01101000);
800 /* poll for phy !reset */
801 /* XXX FIXME add timeout */
802 while (!(mfdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSTA) & 0x00001000))
805 /* deassert the PE0_gpl_utl_reset */
806 mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x00101000);
809 static int ppc405ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
814 val = PTYPE_LEGACY_ENDPOINT;
816 val = PTYPE_ROOT_PORT;
818 mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET,
819 1 << 24 | val << 20 | LNKW_X1 << 12);
821 mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000);
822 mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000);
823 mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET1, 0x720F0000);
824 mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET2, 0x70600003);
827 * Only reset the PHY when no link is currently established.
828 * This is for the Atheros PCIe board which has problems to establish
829 * the link (again) after this PHY reset. All other currently tested
830 * PCIe boards don't show this problem.
831 * This has to be re-tested and fixed in a later release!
833 #if 0 /* XXX FIXME: Not resetting the PHY will leave all resources
834 * configured as done previously by U-Boot. Then Linux will currently
835 * not reassign them. So the PHY reset is now done always. This will
836 * lead to problems with the Atheros PCIe board again.
838 val = mfdcri(SDR0, port->sdr_base + PESDRn_LOOP);
839 if (!(val & 0x00001000))
840 ppc405ex_pcie_phy_reset(port);
842 ppc405ex_pcie_phy_reset(port);
845 dcr_write(port->dcrs, DCRO_PEGPL_CFG, 0x10000000); /* guarded on */
852 static int ppc405ex_pciex_init_utl(struct ppc4xx_pciex_port *port)
854 dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0);
857 * Set buffer allocations and then assert VRB and TXE.
859 out_be32(port->utl_base + PEUTL_OUTTR, 0x02000000);
860 out_be32(port->utl_base + PEUTL_INTR, 0x02000000);
861 out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000);
862 out_be32(port->utl_base + PEUTL_PBBSZ, 0x21000000);
863 out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000);
864 out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000);
865 out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000);
866 out_be32(port->utl_base + PEUTL_PCTL, 0x80800066);
868 out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000);
873 static struct ppc4xx_pciex_hwops ppc405ex_pcie_hwops __initdata =
875 .core_init = ppc405ex_pciex_core_init,
876 .port_init_hw = ppc405ex_pciex_init_port_hw,
877 .setup_utl = ppc405ex_pciex_init_utl,
880 #endif /* CONFIG_40x */
883 /* Check that the core has been initied and if not, do it */
884 static int __init ppc4xx_pciex_check_core_init(struct device_node *np)
886 static int core_init;
893 if (of_device_is_compatible(np, "ibm,plb-pciex-440spe")) {
894 if (ppc440spe_revA())
895 ppc4xx_pciex_hwops = &ppc440speA_pcie_hwops;
897 ppc4xx_pciex_hwops = &ppc440speB_pcie_hwops;
899 #endif /* CONFIG_44x */
901 if (of_device_is_compatible(np, "ibm,plb-pciex-405ex"))
902 ppc4xx_pciex_hwops = &ppc405ex_pcie_hwops;
904 if (ppc4xx_pciex_hwops == NULL) {
905 printk(KERN_WARNING "PCIE: unknown host type %s\n",
910 count = ppc4xx_pciex_hwops->core_init(np);
913 kzalloc(count * sizeof(struct ppc4xx_pciex_port),
915 if (ppc4xx_pciex_ports) {
916 ppc4xx_pciex_port_count = count;
919 printk(KERN_WARNING "PCIE: failed to allocate ports array\n");
925 static void __init ppc4xx_pciex_port_init_mapping(struct ppc4xx_pciex_port *port)
927 /* We map PCI Express configuration based on the reg property */
928 dcr_write(port->dcrs, DCRO_PEGPL_CFGBAH,
929 RES_TO_U32_HIGH(port->cfg_space.start));
930 dcr_write(port->dcrs, DCRO_PEGPL_CFGBAL,
931 RES_TO_U32_LOW(port->cfg_space.start));
933 /* XXX FIXME: Use size from reg property. For now, map 512M */
934 dcr_write(port->dcrs, DCRO_PEGPL_CFGMSK, 0xe0000001);
936 /* We map UTL registers based on the reg property */
937 dcr_write(port->dcrs, DCRO_PEGPL_REGBAH,
938 RES_TO_U32_HIGH(port->utl_regs.start));
939 dcr_write(port->dcrs, DCRO_PEGPL_REGBAL,
940 RES_TO_U32_LOW(port->utl_regs.start));
942 /* XXX FIXME: Use size from reg property */
943 dcr_write(port->dcrs, DCRO_PEGPL_REGMSK, 0x00007001);
945 /* Disable all other outbound windows */
946 dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, 0);
947 dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, 0);
948 dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, 0);
949 dcr_write(port->dcrs, DCRO_PEGPL_MSGMSK, 0);
952 static int __init ppc4xx_pciex_wait_on_sdr(struct ppc4xx_pciex_port *port,
953 unsigned int sdr_offset,
960 while(timeout_ms--) {
961 val = mfdcri(SDR0, port->sdr_base + sdr_offset);
962 if ((val & mask) == value) {
963 pr_debug("PCIE%d: Wait on SDR %x success with tm %d (%08x)\n",
964 port->index, sdr_offset, timeout_ms, val);
972 static int __init ppc4xx_pciex_port_init(struct ppc4xx_pciex_port *port)
977 if (ppc4xx_pciex_hwops->port_init_hw)
978 rc = ppc4xx_pciex_hwops->port_init_hw(port);
982 printk(KERN_INFO "PCIE%d: Checking link...\n",
985 /* Wait for reset to complete */
986 if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1 << 20, 0, 10)) {
987 printk(KERN_WARNING "PCIE%d: PGRST failed\n",
992 /* Check for card presence detect if supported, if not, just wait for
993 * link unconditionally.
995 * note that we don't fail if there is no link, we just filter out
996 * config space accesses. That way, it will be easier to implement
999 if (!port->has_ibpre ||
1000 !ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP,
1001 1 << 28, 1 << 28, 100)) {
1003 "PCIE%d: Device detected, waiting for link...\n",
1005 if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP,
1006 0x1000, 0x1000, 2000))
1008 "PCIE%d: Link up failed\n", port->index);
1011 "PCIE%d: link is up !\n", port->index);
1015 printk(KERN_INFO "PCIE%d: No device detected.\n", port->index);
1018 * Initialize mapping: disable all regions and configure
1019 * CFG and REG regions based on resources in the device tree
1021 ppc4xx_pciex_port_init_mapping(port);
1026 port->utl_base = ioremap(port->utl_regs.start, 0x100);
1027 BUG_ON(port->utl_base == NULL);
1030 * Setup UTL registers --BenH.
1032 if (ppc4xx_pciex_hwops->setup_utl)
1033 ppc4xx_pciex_hwops->setup_utl(port);
1036 * Check for VC0 active and assert RDY.
1039 ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS,
1040 1 << 16, 1 << 16, 5000)) {
1041 printk(KERN_INFO "PCIE%d: VC0 not active\n", port->index);
1045 mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET,
1046 mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) | 1 << 20);
1052 static int ppc4xx_pciex_validate_bdf(struct ppc4xx_pciex_port *port,
1053 struct pci_bus *bus,
1058 /* Endpoint can not generate upstream(remote) config cycles */
1059 if (port->endpoint && bus->number != port->hose->first_busno)
1060 return PCIBIOS_DEVICE_NOT_FOUND;
1062 /* Check we are within the mapped range */
1063 if (bus->number > port->hose->last_busno) {
1065 printk(KERN_WARNING "Warning! Probing bus %u"
1066 " out of range !\n", bus->number);
1069 return PCIBIOS_DEVICE_NOT_FOUND;
1072 /* The root complex has only one device / function */
1073 if (bus->number == port->hose->first_busno && devfn != 0)
1074 return PCIBIOS_DEVICE_NOT_FOUND;
1076 /* The other side of the RC has only one device as well */
1077 if (bus->number == (port->hose->first_busno + 1) &&
1078 PCI_SLOT(devfn) != 0)
1079 return PCIBIOS_DEVICE_NOT_FOUND;
1081 /* Check if we have a link */
1082 if ((bus->number != port->hose->first_busno) && !port->link)
1083 return PCIBIOS_DEVICE_NOT_FOUND;
1088 static void __iomem *ppc4xx_pciex_get_config_base(struct ppc4xx_pciex_port *port,
1089 struct pci_bus *bus,
1094 /* Remove the casts when we finally remove the stupid volatile
1095 * in struct pci_controller
1097 if (bus->number == port->hose->first_busno)
1098 return (void __iomem *)port->hose->cfg_addr;
1100 relbus = bus->number - (port->hose->first_busno + 1);
1101 return (void __iomem *)port->hose->cfg_data +
1102 ((relbus << 20) | (devfn << 12));
1105 static int ppc4xx_pciex_read_config(struct pci_bus *bus, unsigned int devfn,
1106 int offset, int len, u32 *val)
1108 struct pci_controller *hose = (struct pci_controller *) bus->sysdata;
1109 struct ppc4xx_pciex_port *port =
1110 &ppc4xx_pciex_ports[hose->indirect_type];
1114 BUG_ON(hose != port->hose);
1116 if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0)
1117 return PCIBIOS_DEVICE_NOT_FOUND;
1119 addr = ppc4xx_pciex_get_config_base(port, bus, devfn);
1122 * Reading from configuration space of non-existing device can
1123 * generate transaction errors. For the read duration we suppress
1124 * assertion of machine check exceptions to avoid those.
1126 gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG);
1127 dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA);
1129 /* Make sure no CRS is recorded */
1130 out_be32(port->utl_base + PEUTL_RCSTA, 0x00040000);
1134 *val = in_8((u8 *)(addr + offset));
1137 *val = in_le16((u16 *)(addr + offset));
1140 *val = in_le32((u32 *)(addr + offset));
1144 pr_debug("pcie-config-read: bus=%3d [%3d..%3d] devfn=0x%04x"
1145 " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n",
1146 bus->number, hose->first_busno, hose->last_busno,
1147 devfn, offset, len, addr + offset, *val);
1149 /* Check for CRS (440SPe rev B does that for us but heh ..) */
1150 if (in_be32(port->utl_base + PEUTL_RCSTA) & 0x00040000) {
1151 pr_debug("Got CRS !\n");
1152 if (len != 4 || offset != 0)
1153 return PCIBIOS_DEVICE_NOT_FOUND;
1157 dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg);
1159 return PCIBIOS_SUCCESSFUL;
1162 static int ppc4xx_pciex_write_config(struct pci_bus *bus, unsigned int devfn,
1163 int offset, int len, u32 val)
1165 struct pci_controller *hose = (struct pci_controller *) bus->sysdata;
1166 struct ppc4xx_pciex_port *port =
1167 &ppc4xx_pciex_ports[hose->indirect_type];
1171 if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0)
1172 return PCIBIOS_DEVICE_NOT_FOUND;
1174 addr = ppc4xx_pciex_get_config_base(port, bus, devfn);
1177 * Reading from configuration space of non-existing device can
1178 * generate transaction errors. For the read duration we suppress
1179 * assertion of machine check exceptions to avoid those.
1181 gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG);
1182 dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA);
1184 pr_debug("pcie-config-write: bus=%3d [%3d..%3d] devfn=0x%04x"
1185 " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n",
1186 bus->number, hose->first_busno, hose->last_busno,
1187 devfn, offset, len, addr + offset, val);
1191 out_8((u8 *)(addr + offset), val);
1194 out_le16((u16 *)(addr + offset), val);
1197 out_le32((u32 *)(addr + offset), val);
1201 dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg);
1203 return PCIBIOS_SUCCESSFUL;
1206 static struct pci_ops ppc4xx_pciex_pci_ops =
1208 .read = ppc4xx_pciex_read_config,
1209 .write = ppc4xx_pciex_write_config,
1212 static void __init ppc4xx_configure_pciex_POMs(struct ppc4xx_pciex_port *port,
1213 struct pci_controller *hose,
1214 void __iomem *mbase)
1216 u32 lah, lal, pciah, pcial, sa;
1219 /* Setup outbound memory windows */
1220 for (i = j = 0; i < 3; i++) {
1221 struct resource *res = &hose->mem_resources[i];
1223 /* we only care about memory windows */
1224 if (!(res->flags & IORESOURCE_MEM))
1227 printk(KERN_WARNING "%s: Too many ranges\n",
1228 port->node->full_name);
1232 /* Calculate register values */
1233 lah = RES_TO_U32_HIGH(res->start);
1234 lal = RES_TO_U32_LOW(res->start);
1235 pciah = RES_TO_U32_HIGH(res->start - hose->pci_mem_offset);
1236 pcial = RES_TO_U32_LOW(res->start - hose->pci_mem_offset);
1237 sa = res->end + 1 - res->start;
1238 if (!is_power_of_2(sa) || sa < 0x100000 ||
1240 printk(KERN_WARNING "%s: Resource out of range\n",
1241 port->node->full_name);
1244 sa = (0xffffffffu << ilog2(sa)) | 0x1;
1246 /* Program register values */
1249 out_le32(mbase + PECFG_POM0LAH, pciah);
1250 out_le32(mbase + PECFG_POM0LAL, pcial);
1251 dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAH, lah);
1252 dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAL, lal);
1253 dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKH, 0x7fffffff);
1254 dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, sa | 3);
1257 out_le32(mbase + PECFG_POM1LAH, pciah);
1258 out_le32(mbase + PECFG_POM1LAL, pcial);
1259 dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAH, lah);
1260 dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAL, lal);
1261 dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKH, 0x7fffffff);
1262 dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, sa | 3);
1268 /* Configure IO, always 64K starting at 0 */
1269 if (hose->io_resource.flags & IORESOURCE_IO) {
1270 lah = RES_TO_U32_HIGH(hose->io_base_phys);
1271 lal = RES_TO_U32_LOW(hose->io_base_phys);
1272 out_le32(mbase + PECFG_POM2LAH, 0);
1273 out_le32(mbase + PECFG_POM2LAL, 0);
1274 dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAH, lah);
1275 dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAL, lal);
1276 dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKH, 0x7fffffff);
1277 dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, 0xffff0000 | 3);
1281 static void __init ppc4xx_configure_pciex_PIMs(struct ppc4xx_pciex_port *port,
1282 struct pci_controller *hose,
1283 void __iomem *mbase,
1284 struct resource *res)
1286 resource_size_t size = res->end - res->start + 1;
1289 /* Calculate window size */
1290 sa = (0xffffffffffffffffull << ilog2(size));;
1291 if (res->flags & IORESOURCE_PREFETCH)
1294 out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa));
1295 out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa));
1297 /* The setup of the split looks weird to me ... let's see if it works */
1298 out_le32(mbase + PECFG_PIM0LAL, 0x00000000);
1299 out_le32(mbase + PECFG_PIM0LAH, 0x00000000);
1300 out_le32(mbase + PECFG_PIM1LAL, 0x00000000);
1301 out_le32(mbase + PECFG_PIM1LAH, 0x00000000);
1302 out_le32(mbase + PECFG_PIM01SAH, 0xffff0000);
1303 out_le32(mbase + PECFG_PIM01SAL, 0x00000000);
1305 /* Enable inbound mapping */
1306 out_le32(mbase + PECFG_PIMEN, 0x1);
1308 out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(res->start));
1309 out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(res->start));
1311 /* Enable I/O, Mem, and Busmaster cycles */
1312 out_le16(mbase + PCI_COMMAND,
1313 in_le16(mbase + PCI_COMMAND) |
1314 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
1317 static void __init ppc4xx_pciex_port_setup_hose(struct ppc4xx_pciex_port *port)
1319 struct resource dma_window;
1320 struct pci_controller *hose = NULL;
1321 const int *bus_range;
1322 int primary = 0, busses;
1323 void __iomem *mbase = NULL, *cfg_data = NULL;
1325 /* XXX FIXME: Handle endpoint mode properly */
1326 if (port->endpoint) {
1327 printk(KERN_WARNING "PCIE%d: Port in endpoint mode !\n",
1332 /* Check if primary bridge */
1333 if (of_get_property(port->node, "primary", NULL))
1336 /* Get bus range if any */
1337 bus_range = of_get_property(port->node, "bus-range", NULL);
1339 /* Allocate the host controller data structure */
1340 hose = pcibios_alloc_controller(port->node);
1344 /* We stick the port number in "indirect_type" so the config space
1345 * ops can retrieve the port data structure easily
1347 hose->indirect_type = port->index;
1350 hose->first_busno = bus_range ? bus_range[0] : 0x0;
1351 hose->last_busno = bus_range ? bus_range[1] : 0xff;
1353 /* Because of how big mapping the config space is (1M per bus), we
1354 * limit how many busses we support. In the long run, we could replace
1355 * that with something akin to kmap_atomic instead. We set aside 1 bus
1356 * for the host itself too.
1358 busses = hose->last_busno - hose->first_busno; /* This is off by 1 */
1359 if (busses > MAX_PCIE_BUS_MAPPED) {
1360 busses = MAX_PCIE_BUS_MAPPED;
1361 hose->last_busno = hose->first_busno + busses;
1364 /* We map the external config space in cfg_data and the host config
1365 * space in cfg_addr. External space is 1M per bus, internal space
1368 cfg_data = ioremap(port->cfg_space.start +
1369 (hose->first_busno + 1) * 0x100000,
1371 mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000);
1372 if (cfg_data == NULL || mbase == NULL) {
1373 printk(KERN_ERR "%s: Can't map config space !",
1374 port->node->full_name);
1378 hose->cfg_data = cfg_data;
1379 hose->cfg_addr = mbase;
1381 pr_debug("PCIE %s, bus %d..%d\n", port->node->full_name,
1382 hose->first_busno, hose->last_busno);
1383 pr_debug(" config space mapped at: root @0x%p, other @0x%p\n",
1384 hose->cfg_addr, hose->cfg_data);
1386 /* Setup config space */
1387 hose->ops = &ppc4xx_pciex_pci_ops;
1389 mbase = (void __iomem *)hose->cfg_addr;
1392 * Set bus numbers on our root port
1394 out_8(mbase + PCI_PRIMARY_BUS, hose->first_busno);
1395 out_8(mbase + PCI_SECONDARY_BUS, hose->first_busno + 1);
1396 out_8(mbase + PCI_SUBORDINATE_BUS, hose->last_busno);
1399 * OMRs are already reset, also disable PIMs
1401 out_le32(mbase + PECFG_PIMEN, 0);
1403 /* Parse outbound mapping resources */
1404 pci_process_bridge_OF_ranges(hose, port->node, primary);
1406 /* Parse inbound mapping resources */
1407 if (ppc4xx_parse_dma_ranges(hose, mbase, &dma_window) != 0)
1410 /* Configure outbound ranges POMs */
1411 ppc4xx_configure_pciex_POMs(port, hose, mbase);
1413 /* Configure inbound ranges PIMs */
1414 ppc4xx_configure_pciex_PIMs(port, hose, mbase, &dma_window);
1416 /* The root complex doesn't show up if we don't set some vendor
1417 * and device IDs into it. Those are the same bogus one that the
1418 * initial code in arch/ppc add. We might want to change that.
1420 out_le16(mbase + 0x200, 0xaaa0 + port->index);
1421 out_le16(mbase + 0x202, 0xbed0 + port->index);
1423 /* Set Class Code to PCI-PCI bridge and Revision Id to 1 */
1424 out_le32(mbase + 0x208, 0x06040001);
1426 printk(KERN_INFO "PCIE%d: successfully set as root-complex\n",
1431 pcibios_free_controller(hose);
1438 static void __init ppc4xx_probe_pciex_bridge(struct device_node *np)
1440 struct ppc4xx_pciex_port *port;
1445 /* First, proceed to core initialization as we assume there's
1446 * only one PCIe core in the system
1448 if (ppc4xx_pciex_check_core_init(np))
1451 /* Get the port number from the device-tree */
1452 pval = of_get_property(np, "port", NULL);
1454 printk(KERN_ERR "PCIE: Can't find port number for %s\n",
1459 if (portno >= ppc4xx_pciex_port_count) {
1460 printk(KERN_ERR "PCIE: port number out of range for %s\n",
1464 port = &ppc4xx_pciex_ports[portno];
1465 port->index = portno;
1466 port->node = of_node_get(np);
1467 pval = of_get_property(np, "sdr-base", NULL);
1469 printk(KERN_ERR "PCIE: missing sdr-base for %s\n",
1473 port->sdr_base = *pval;
1475 /* XXX Currently, we only support root complex mode */
1478 /* Fetch config space registers address */
1479 if (of_address_to_resource(np, 0, &port->cfg_space)) {
1480 printk(KERN_ERR "%s: Can't get PCI-E config space !",
1484 /* Fetch host bridge internal registers address */
1485 if (of_address_to_resource(np, 1, &port->utl_regs)) {
1486 printk(KERN_ERR "%s: Can't get UTL register base !",
1492 dcrs = dcr_resource_start(np, 0);
1494 printk(KERN_ERR "%s: Can't get DCR register base !",
1498 port->dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0));
1500 /* Initialize the port specific registers */
1501 if (ppc4xx_pciex_port_init(port)) {
1502 printk(KERN_WARNING "PCIE%d: Port init failed\n", port->index);
1506 /* Setup the linux hose data structure */
1507 ppc4xx_pciex_port_setup_hose(port);
1510 #endif /* CONFIG_PPC4xx_PCI_EXPRESS */
1512 static int __init ppc4xx_pci_find_bridges(void)
1514 struct device_node *np;
1516 #ifdef CONFIG_PPC4xx_PCI_EXPRESS
1517 for_each_compatible_node(np, NULL, "ibm,plb-pciex")
1518 ppc4xx_probe_pciex_bridge(np);
1520 for_each_compatible_node(np, NULL, "ibm,plb-pcix")
1521 ppc4xx_probe_pcix_bridge(np);
1522 for_each_compatible_node(np, NULL, "ibm,plb-pci")
1523 ppc4xx_probe_pci_bridge(np);
1527 arch_initcall(ppc4xx_pci_find_bridges);