| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Benjamin Herrenschmidt | 6312 | 68.53% | 8 | 16.33% |
| Stefan Roese | 942 | 10.23% | 6 | 12.24% |
| Tirumala R Marri | 598 | 6.49% | 2 | 4.08% |
| Tony Breeds | 527 | 5.72% | 7 | 14.29% |
| Vinh Nguyen Huu Tuong | 304 | 3.30% | 1 | 2.04% |
| Ayman El-Khashab | 287 | 3.12% | 1 | 2.04% |
| Rob Herring | 88 | 0.96% | 5 | 10.20% |
| Joe Perches | 26 | 0.28% | 1 | 2.04% |
| Alistair Popple | 24 | 0.26% | 3 | 6.12% |
| Ilya Yanok | 23 | 0.25% | 1 | 2.04% |
| Josh Boyer | 18 | 0.20% | 1 | 2.04% |
| Jeremy Fitzhardinge | 14 | 0.15% | 1 | 2.04% |
| Mika Westerberg | 13 | 0.14% | 1 | 2.04% |
| Valentine Barshak | 11 | 0.12% | 1 | 2.04% |
| Matthias Fuchs | 7 | 0.08% | 1 | 2.04% |
| Kumar Gala | 6 | 0.07% | 1 | 2.04% |
| Linus Torvalds (pre-git) | 2 | 0.02% | 1 | 2.04% |
| Gerhard Pircher | 2 | 0.02% | 1 | 2.04% |
| Kees Cook | 2 | 0.02% | 1 | 2.04% |
| Stef van Os | 1 | 0.01% | 1 | 2.04% |
| huhai | 1 | 0.01% | 1 | 2.04% |
| Grant C. Likely | 1 | 0.01% | 1 | 2.04% |
| Michael Ellerman | 1 | 0.01% | 1 | 2.04% |
| Linus Torvalds | 1 | 0.01% | 1 | 2.04% |
| Total | 9211 | 49 |
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/* * PCI / PCI-X / PCI-Express support for 4xx parts * * Copyright 2007 Ben. Herrenschmidt <benh@kernel.crashing.org>, IBM Corp. * * Most PCI Express code is coming from Stefan Roese implementation for * arch/ppc in the Denx tree, slightly reworked by me. * * Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de> * * Some of that comes itself from a previous implementation for 440SPE only * by Roland Dreier: * * Copyright (c) 2005 Cisco Systems. All rights reserved. * Roland Dreier <rolandd@cisco.com> * */ #undef DEBUG #include <linux/kernel.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/delay.h> #include <linux/slab.h> #include <asm/io.h> #include <asm/pci-bridge.h> #include <asm/machdep.h> #include <asm/dcr.h> #include <asm/dcr-regs.h> #include <mm/mmu_decl.h> #include "pci.h" static int dma_offset_set; #define U64_TO_U32_LOW(val) ((u32)((val) & 0x00000000ffffffffULL)) #define U64_TO_U32_HIGH(val) ((u32)((val) >> 32)) #define RES_TO_U32_LOW(val) \ ((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_LOW(val) : (val)) #define RES_TO_U32_HIGH(val) \ ((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_HIGH(val) : (0)) static inline int ppc440spe_revA(void) { /* Catch both 440SPe variants, with and without RAID6 support */ if ((mfspr(SPRN_PVR) & 0xffefffff) == 0x53421890) return 1; else return 0; } static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev) { struct pci_controller *hose; struct resource *r; if (dev->devfn != 0 || dev->bus->self != NULL) return; hose = pci_bus_to_host(dev->bus); if (hose == NULL) return; if (!of_device_is_compatible(hose->dn, "ibm,plb-pciex") && !of_device_is_compatible(hose->dn, "ibm,plb-pcix") && !of_device_is_compatible(hose->dn, "ibm,plb-pci")) return; if (of_device_is_compatible(hose->dn, "ibm,plb440epx-pci") || of_device_is_compatible(hose->dn, "ibm,plb440grx-pci")) { hose->indirect_type |= PPC_INDIRECT_TYPE_BROKEN_MRM; } /* Hide the PCI host BARs from the kernel as their content doesn't * fit well in the resource management */ pci_dev_for_each_resource(dev, r) { r->start = r->end = 0; r->flags = 0; } printk(KERN_INFO "PCI: Hiding 4xx host bridge resources %s\n", pci_name(dev)); } DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, fixup_ppc4xx_pci_bridge); static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose, void __iomem *reg, struct resource *res) { u64 size; struct of_range_parser parser; struct of_range range; /* Default */ res->start = 0; size = 0x80000000; res->end = size - 1; res->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH; if (of_pci_dma_range_parser_init(&parser, hose->dn)) goto out; for_each_of_range(&parser, &range) { u32 pci_space = range.flags; u64 pci_addr = range.bus_addr; u64 cpu_addr = range.cpu_addr; size = range.size; if (cpu_addr == OF_BAD_ADDR || size == 0) continue; /* We only care about memory */ if ((pci_space & 0x03000000) != 0x02000000) continue; /* We currently only support memory at 0, and pci_addr * within 32 bits space */ if (cpu_addr != 0 || pci_addr > 0xffffffff) { printk(KERN_WARNING "%pOF: Ignored unsupported dma range" " 0x%016llx...0x%016llx -> 0x%016llx\n", hose->dn, pci_addr, pci_addr + size - 1, cpu_addr); continue; } /* Check if not prefetchable */ if (!(pci_space & 0x40000000)) res->flags &= ~IORESOURCE_PREFETCH; /* Use that */ res->start = pci_addr; /* Beware of 32 bits resources */ if (sizeof(resource_size_t) == sizeof(u32) && (pci_addr + size) > 0x100000000ull) res->end = 0xffffffff; else res->end = res->start + size - 1; break; } /* We only support one global DMA offset */ if (dma_offset_set && pci_dram_offset != res->start) { printk(KERN_ERR "%pOF: dma-ranges(s) mismatch\n", hose->dn); return -ENXIO; } /* Check that we can fit all of memory as we don't support * DMA bounce buffers */ if (size < total_memory) { printk(KERN_ERR "%pOF: dma-ranges too small " "(size=%llx total_memory=%llx)\n", hose->dn, size, (u64)total_memory); return -ENXIO; } /* Check we are a power of 2 size and that base is a multiple of size*/ if ((size & (size - 1)) != 0 || (res->start & (size - 1)) != 0) { printk(KERN_ERR "%pOF: dma-ranges unaligned\n", hose->dn); return -ENXIO; } /* Check that we are fully contained within 32 bits space if we are not * running on a 460sx or 476fpe which have 64 bit bus addresses. */ if (res->end > 0xffffffff && !(of_device_is_compatible(hose->dn, "ibm,plb-pciex-460sx") || of_device_is_compatible(hose->dn, "ibm,plb-pciex-476fpe"))) { printk(KERN_ERR "%pOF: dma-ranges outside of 32 bits space\n", hose->dn); return -ENXIO; } out: dma_offset_set = 1; pci_dram_offset = res->start; hose->dma_window_base_cur = res->start; hose->dma_window_size = resource_size(res); printk(KERN_INFO "4xx PCI DMA offset set to 0x%08lx\n", pci_dram_offset); printk(KERN_INFO "4xx PCI DMA window base to 0x%016llx\n", (unsigned long long)hose->dma_window_base_cur); printk(KERN_INFO "DMA window size 0x%016llx\n", (unsigned long long)hose->dma_window_size); return 0; } /* * 4xx PCI 2.x part */ static int __init ppc4xx_setup_one_pci_PMM(struct pci_controller *hose, void __iomem *reg, u64 plb_addr, u64 pci_addr, u64 size, unsigned int flags, int index) { u32 ma, pcila, pciha; /* Hack warning ! The "old" PCI 2.x cell only let us configure the low * 32-bit of incoming PLB addresses. The top 4 bits of the 36-bit * address are actually hard wired to a value that appears to depend * on the specific SoC. For example, it's 0 on 440EP and 1 on 440EPx. * * The trick here is we just crop those top bits and ignore them when * programming the chip. That means the device-tree has to be right * for the specific part used (we don't print a warning if it's wrong * but on the other hand, you'll crash quickly enough), but at least * this code should work whatever the hard coded value is */ plb_addr &= 0xffffffffull; /* Note: Due to the above hack, the test below doesn't actually test * if you address is above 4G, but it tests that address and * (address + size) are both contained in the same 4G */ if ((plb_addr + size) > 0xffffffffull || !is_power_of_2(size) || size < 0x1000 || (plb_addr & (size - 1)) != 0) { printk(KERN_WARNING "%pOF: Resource out of range\n", hose->dn); return -1; } ma = (0xffffffffu << ilog2(size)) | 1; if (flags & IORESOURCE_PREFETCH) ma |= 2; pciha = RES_TO_U32_HIGH(pci_addr); pcila = RES_TO_U32_LOW(pci_addr); writel(plb_addr, reg + PCIL0_PMM0LA + (0x10 * index)); writel(pcila, reg + PCIL0_PMM0PCILA + (0x10 * index)); writel(pciha, reg + PCIL0_PMM0PCIHA + (0x10 * index)); writel(ma, reg + PCIL0_PMM0MA + (0x10 * index)); return 0; } static void __init ppc4xx_configure_pci_PMMs(struct pci_controller *hose, void __iomem *reg) { int i, j, found_isa_hole = 0; /* Setup outbound memory windows */ for (i = j = 0; i < 3; i++) { struct resource *res = &hose->mem_resources[i]; resource_size_t offset = hose->mem_offset[i]; /* we only care about memory windows */ if (!(res->flags & IORESOURCE_MEM)) continue; if (j > 2) { printk(KERN_WARNING "%pOF: Too many ranges\n", hose->dn); break; } /* Configure the resource */ if (ppc4xx_setup_one_pci_PMM(hose, reg, res->start, res->start - offset, resource_size(res), res->flags, j) == 0) { j++; /* If the resource PCI address is 0 then we have our * ISA memory hole */ if (res->start == offset) found_isa_hole = 1; } } /* Handle ISA memory hole if not already covered */ if (j <= 2 && !found_isa_hole && hose->isa_mem_size) if (ppc4xx_setup_one_pci_PMM(hose, reg, hose->isa_mem_phys, 0, hose->isa_mem_size, 0, j) == 0) printk(KERN_INFO "%pOF: Legacy ISA memory support enabled\n", hose->dn); } static void __init ppc4xx_configure_pci_PTMs(struct pci_controller *hose, void __iomem *reg, const struct resource *res) { resource_size_t size = resource_size(res); u32 sa; /* Calculate window size */ sa = (0xffffffffu << ilog2(size)) | 1; sa |= 0x1; /* RAM is always at 0 local for now */ writel(0, reg + PCIL0_PTM1LA); writel(sa, reg + PCIL0_PTM1MS); /* Map on PCI side */ early_write_config_dword(hose, hose->first_busno, 0, PCI_BASE_ADDRESS_1, res->start); early_write_config_dword(hose, hose->first_busno, 0, PCI_BASE_ADDRESS_2, 0x00000000); early_write_config_word(hose, hose->first_busno, 0, PCI_COMMAND, 0x0006); } static void __init ppc4xx_probe_pci_bridge(struct device_node *np) { /* NYI */ struct resource rsrc_cfg; struct resource rsrc_reg; struct resource dma_window; struct pci_controller *hose = NULL; void __iomem *reg = NULL; const int *bus_range; int primary = 0; /* Check if device is enabled */ if (!of_device_is_available(np)) { printk(KERN_INFO "%pOF: Port disabled via device-tree\n", np); return; } /* Fetch config space registers address */ if (of_address_to_resource(np, 0, &rsrc_cfg)) { printk(KERN_ERR "%pOF: Can't get PCI config register base !", np); return; } /* Fetch host bridge internal registers address */ if (of_address_to_resource(np, 3, &rsrc_reg)) { printk(KERN_ERR "%pOF: Can't get PCI internal register base !", np); return; } /* Check if primary bridge */ if (of_property_read_bool(np, "primary")) primary = 1; /* Get bus range if any */ bus_range = of_get_property(np, "bus-range", NULL); /* Map registers */ reg = ioremap(rsrc_reg.start, resource_size(&rsrc_reg)); if (reg == NULL) { printk(KERN_ERR "%pOF: Can't map registers !", np); goto fail; } /* Allocate the host controller data structure */ hose = pcibios_alloc_controller(np); if (!hose) goto fail; hose->first_busno = bus_range ? bus_range[0] : 0x0; hose->last_busno = bus_range ? bus_range[1] : 0xff; /* Setup config space */ setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0); /* Disable all windows */ writel(0, reg + PCIL0_PMM0MA); writel(0, reg + PCIL0_PMM1MA); writel(0, reg + PCIL0_PMM2MA); writel(0, reg + PCIL0_PTM1MS); writel(0, reg + PCIL0_PTM2MS); /* Parse outbound mapping resources */ pci_process_bridge_OF_ranges(hose, np, primary); /* Parse inbound mapping resources */ if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0) goto fail; /* Configure outbound ranges POMs */ ppc4xx_configure_pci_PMMs(hose, reg); /* Configure inbound ranges PIMs */ ppc4xx_configure_pci_PTMs(hose, reg, &dma_window); /* We don't need the registers anymore */ iounmap(reg); return; fail: if (hose) pcibios_free_controller(hose); if (reg) iounmap(reg); } /* * 4xx PCI-X part */ static int __init ppc4xx_setup_one_pcix_POM(struct pci_controller *hose, void __iomem *reg, u64 plb_addr, u64 pci_addr, u64 size, unsigned int flags, int index) { u32 lah, lal, pciah, pcial, sa; if (!is_power_of_2(size) || size < 0x1000 || (plb_addr & (size - 1)) != 0) { printk(KERN_WARNING "%pOF: Resource out of range\n", hose->dn); return -1; } /* Calculate register values */ lah = RES_TO_U32_HIGH(plb_addr); lal = RES_TO_U32_LOW(plb_addr); pciah = RES_TO_U32_HIGH(pci_addr); pcial = RES_TO_U32_LOW(pci_addr); sa = (0xffffffffu << ilog2(size)) | 0x1; /* Program register values */ if (index == 0) { writel(lah, reg + PCIX0_POM0LAH); writel(lal, reg + PCIX0_POM0LAL); writel(pciah, reg + PCIX0_POM0PCIAH); writel(pcial, reg + PCIX0_POM0PCIAL); writel(sa, reg + PCIX0_POM0SA); } else { writel(lah, reg + PCIX0_POM1LAH); writel(lal, reg + PCIX0_POM1LAL); writel(pciah, reg + PCIX0_POM1PCIAH); writel(pcial, reg + PCIX0_POM1PCIAL); writel(sa, reg + PCIX0_POM1SA); } return 0; } static void __init ppc4xx_configure_pcix_POMs(struct pci_controller *hose, void __iomem *reg) { int i, j, found_isa_hole = 0; /* Setup outbound memory windows */ for (i = j = 0; i < 3; i++) { struct resource *res = &hose->mem_resources[i]; resource_size_t offset = hose->mem_offset[i]; /* we only care about memory windows */ if (!(res->flags & IORESOURCE_MEM)) continue; if (j > 1) { printk(KERN_WARNING "%pOF: Too many ranges\n", hose->dn); break; } /* Configure the resource */ if (ppc4xx_setup_one_pcix_POM(hose, reg, res->start, res->start - offset, resource_size(res), res->flags, j) == 0) { j++; /* If the resource PCI address is 0 then we have our * ISA memory hole */ if (res->start == offset) found_isa_hole = 1; } } /* Handle ISA memory hole if not already covered */ if (j <= 1 && !found_isa_hole && hose->isa_mem_size) if (ppc4xx_setup_one_pcix_POM(hose, reg, hose->isa_mem_phys, 0, hose->isa_mem_size, 0, j) == 0) printk(KERN_INFO "%pOF: Legacy ISA memory support enabled\n", hose->dn); } static void __init ppc4xx_configure_pcix_PIMs(struct pci_controller *hose, void __iomem *reg, const struct resource *res, int big_pim, int enable_msi_hole) { resource_size_t size = resource_size(res); u32 sa; /* RAM is always at 0 */ writel(0x00000000, reg + PCIX0_PIM0LAH); writel(0x00000000, reg + PCIX0_PIM0LAL); /* Calculate window size */ sa = (0xffffffffu << ilog2(size)) | 1; sa |= 0x1; if (res->flags & IORESOURCE_PREFETCH) sa |= 0x2; if (enable_msi_hole) sa |= 0x4; writel(sa, reg + PCIX0_PIM0SA); if (big_pim) writel(0xffffffff, reg + PCIX0_PIM0SAH); /* Map on PCI side */ writel(0x00000000, reg + PCIX0_BAR0H); writel(res->start, reg + PCIX0_BAR0L); writew(0x0006, reg + PCIX0_COMMAND); } static void __init ppc4xx_probe_pcix_bridge(struct device_node *np) { struct resource rsrc_cfg; struct resource rsrc_reg; struct resource dma_window; struct pci_controller *hose = NULL; void __iomem *reg = NULL; const int *bus_range; int big_pim, msi, primary; /* Fetch config space registers address */ if (of_address_to_resource(np, 0, &rsrc_cfg)) { printk(KERN_ERR "%pOF: Can't get PCI-X config register base !", np); return; } /* Fetch host bridge internal registers address */ if (of_address_to_resource(np, 3, &rsrc_reg)) { printk(KERN_ERR "%pOF: Can't get PCI-X internal register base !", np); return; } /* Check if it supports large PIMs (440GX) */ big_pim = of_property_read_bool(np, "large-inbound-windows"); /* Check if we should enable MSIs inbound hole */ msi = of_property_read_bool(np, "enable-msi-hole"); /* Check if primary bridge */ primary = of_property_read_bool(np, "primary"); /* Get bus range if any */ bus_range = of_get_property(np, "bus-range", NULL); /* Map registers */ reg = ioremap(rsrc_reg.start, resource_size(&rsrc_reg)); if (reg == NULL) { printk(KERN_ERR "%pOF: Can't map registers !", np); goto fail; } /* Allocate the host controller data structure */ hose = pcibios_alloc_controller(np); if (!hose) goto fail; hose->first_busno = bus_range ? bus_range[0] : 0x0; hose->last_busno = bus_range ? bus_range[1] : 0xff; /* Setup config space */ setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, PPC_INDIRECT_TYPE_SET_CFG_TYPE); /* Disable all windows */ writel(0, reg + PCIX0_POM0SA); writel(0, reg + PCIX0_POM1SA); writel(0, reg + PCIX0_POM2SA); writel(0, reg + PCIX0_PIM0SA); writel(0, reg + PCIX0_PIM1SA); writel(0, reg + PCIX0_PIM2SA); if (big_pim) { writel(0, reg + PCIX0_PIM0SAH); writel(0, reg + PCIX0_PIM2SAH); } /* Parse outbound mapping resources */ pci_process_bridge_OF_ranges(hose, np, primary); /* Parse inbound mapping resources */ if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0) goto fail; /* Configure outbound ranges POMs */ ppc4xx_configure_pcix_POMs(hose, reg); /* Configure inbound ranges PIMs */ ppc4xx_configure_pcix_PIMs(hose, reg, &dma_window, big_pim, msi); /* We don't need the registers anymore */ iounmap(reg); return; fail: if (hose) pcibios_free_controller(hose); if (reg) iounmap(reg); } #ifdef CONFIG_PPC4xx_PCI_EXPRESS /* * 4xx PCI-Express part * * We support 3 parts currently based on the compatible property: * * ibm,plb-pciex-440spe * ibm,plb-pciex-405ex * ibm,plb-pciex-460ex * * Anything else will be rejected for now as they are all subtly * different unfortunately. * */ #define MAX_PCIE_BUS_MAPPED 0x40 struct ppc4xx_pciex_port { struct pci_controller *hose; struct device_node *node; unsigned int index; int endpoint; int link; int has_ibpre; unsigned int sdr_base; dcr_host_t dcrs; struct resource cfg_space; struct resource utl_regs; void __iomem *utl_base; }; static struct ppc4xx_pciex_port *ppc4xx_pciex_ports; static unsigned int ppc4xx_pciex_port_count; struct ppc4xx_pciex_hwops { bool want_sdr; int (*core_init)(struct device_node *np); int (*port_init_hw)(struct ppc4xx_pciex_port *port); int (*setup_utl)(struct ppc4xx_pciex_port *port); void (*check_link)(struct ppc4xx_pciex_port *port); }; static struct ppc4xx_pciex_hwops *ppc4xx_pciex_hwops; static int __init ppc4xx_pciex_wait_on_sdr(struct ppc4xx_pciex_port *port, unsigned int sdr_offset, unsigned int mask, unsigned int value, int timeout_ms) { u32 val; while(timeout_ms--) { val = mfdcri(SDR0, port->sdr_base + sdr_offset); if ((val & mask) == value) { pr_debug("PCIE%d: Wait on SDR %x success with tm %d (%08x)\n", port->index, sdr_offset, timeout_ms, val); return 0; } msleep(1); } return -1; } static int __init ppc4xx_pciex_port_reset_sdr(struct ppc4xx_pciex_port *port) { /* Wait for reset to complete */ if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1 << 20, 0, 10)) { printk(KERN_WARNING "PCIE%d: PGRST failed\n", port->index); return -1; } return 0; } static void __init ppc4xx_pciex_check_link_sdr(struct ppc4xx_pciex_port *port) { printk(KERN_INFO "PCIE%d: Checking link...\n", port->index); /* Check for card presence detect if supported, if not, just wait for * link unconditionally. * * note that we don't fail if there is no link, we just filter out * config space accesses. That way, it will be easier to implement * hotplug later on. */ if (!port->has_ibpre || !ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP, 1 << 28, 1 << 28, 100)) { printk(KERN_INFO "PCIE%d: Device detected, waiting for link...\n", port->index); if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP, 0x1000, 0x1000, 2000)) printk(KERN_WARNING "PCIE%d: Link up failed\n", port->index); else { printk(KERN_INFO "PCIE%d: link is up !\n", port->index); port->link = 1; } } else printk(KERN_INFO "PCIE%d: No device detected.\n", port->index); } #ifdef CONFIG_44x /* Check various reset bits of the 440SPe PCIe core */ static int __init ppc440spe_pciex_check_reset(struct device_node *np) { u32 valPE0, valPE1, valPE2; int err = 0; /* SDR0_PEGPLLLCT1 reset */ if (!(mfdcri(SDR0, PESDR0_PLLLCT1) & 0x01000000)) { /* * the PCIe core was probably already initialised * by firmware - let's re-reset RCSSET regs * * -- Shouldn't we also re-reset the whole thing ? -- BenH */ pr_debug("PCIE: SDR0_PLLLCT1 already reset.\n"); mtdcri(SDR0, PESDR0_440SPE_RCSSET, 0x01010000); mtdcri(SDR0, PESDR1_440SPE_RCSSET, 0x01010000); mtdcri(SDR0, PESDR2_440SPE_RCSSET, 0x01010000); } valPE0 = mfdcri(SDR0, PESDR0_440SPE_RCSSET); valPE1 = mfdcri(SDR0, PESDR1_440SPE_RCSSET); valPE2 = mfdcri(SDR0, PESDR2_440SPE_RCSSET); /* SDR0_PExRCSSET rstgu */ if (!(valPE0 & 0x01000000) || !(valPE1 & 0x01000000) || !(valPE2 & 0x01000000)) { printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstgu error\n"); err = -1; } /* SDR0_PExRCSSET rstdl */ if (!(valPE0 & 0x00010000) || !(valPE1 & 0x00010000) || !(valPE2 & 0x00010000)) { printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstdl error\n"); err = -1; } /* SDR0_PExRCSSET rstpyn */ if ((valPE0 & 0x00001000) || (valPE1 & 0x00001000) || (valPE2 & 0x00001000)) { printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstpyn error\n"); err = -1; } /* SDR0_PExRCSSET hldplb */ if ((valPE0 & 0x10000000) || (valPE1 & 0x10000000) || (valPE2 & 0x10000000)) { printk(KERN_INFO "PCIE: SDR0_PExRCSSET hldplb error\n"); err = -1; } /* SDR0_PExRCSSET rdy */ if ((valPE0 & 0x00100000) || (valPE1 & 0x00100000) || (valPE2 & 0x00100000)) { printk(KERN_INFO "PCIE: SDR0_PExRCSSET rdy error\n"); err = -1; } /* SDR0_PExRCSSET shutdown */ if ((valPE0 & 0x00000100) || (valPE1 & 0x00000100) || (valPE2 & 0x00000100)) { printk(KERN_INFO "PCIE: SDR0_PExRCSSET shutdown error\n"); err = -1; } return err; } /* Global PCIe core initializations for 440SPe core */ static int __init ppc440spe_pciex_core_init(struct device_node *np) { int time_out = 20; /* Set PLL clock receiver to LVPECL */ dcri_clrset(SDR0, PESDR0_PLLLCT1, 0, 1 << 28); /* Shouldn't we do all the calibration stuff etc... here ? */ if (ppc440spe_pciex_check_reset(np)) return -ENXIO; if (!(mfdcri(SDR0, PESDR0_PLLLCT2) & 0x10000)) { printk(KERN_INFO "PCIE: PESDR_PLLCT2 resistance calibration " "failed (0x%08x)\n", mfdcri(SDR0, PESDR0_PLLLCT2)); return -1; } /* De-assert reset of PCIe PLL, wait for lock */ dcri_clrset(SDR0, PESDR0_PLLLCT1, 1 << 24, 0); udelay(3); while (time_out) { if (!(mfdcri(SDR0, PESDR0_PLLLCT3) & 0x10000000)) { time_out--; udelay(1); } else break; } if (!time_out) { printk(KERN_INFO "PCIE: VCO output not locked\n"); return -1; } pr_debug("PCIE initialization OK\n"); return 3; } static int __init ppc440spe_pciex_init_port_hw(struct ppc4xx_pciex_port *port) { u32 val = 1 << 24; if (port->endpoint) val = PTYPE_LEGACY_ENDPOINT << 20; else val = PTYPE_ROOT_PORT << 20; if (port->index == 0) val |= LNKW_X8 << 12; else val |= LNKW_X4 << 12; mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x20222222); if (ppc440spe_revA()) mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x11000000); mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL0SET1, 0x35000000); mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL1SET1, 0x35000000); mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL2SET1, 0x35000000); mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL3SET1, 0x35000000); if (port->index == 0) { mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL4SET1, 0x35000000); mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL5SET1, 0x35000000); mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL6SET1, 0x35000000); mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL7SET1, 0x35000000); } dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, (1 << 24) | (1 << 16), 1 << 12); return ppc4xx_pciex_port_reset_sdr(port); } static int __init ppc440speA_pciex_init_port_hw(struct ppc4xx_pciex_port *port) { return ppc440spe_pciex_init_port_hw(port); } static int __init ppc440speB_pciex_init_port_hw(struct ppc4xx_pciex_port *port) { int rc = ppc440spe_pciex_init_port_hw(port); port->has_ibpre = 1; return rc; } static int ppc440speA_pciex_init_utl(struct ppc4xx_pciex_port *port) { /* XXX Check what that value means... I hate magic */ dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x68782800); /* * Set buffer allocations and then assert VRB and TXE. */ out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000); out_be32(port->utl_base + PEUTL_INTR, 0x02000000); out_be32(port->utl_base + PEUTL_OPDBSZ, 0x10000000); out_be32(port->utl_base + PEUTL_PBBSZ, 0x53000000); out_be32(port->utl_base + PEUTL_IPHBSZ, 0x08000000); out_be32(port->utl_base + PEUTL_IPDBSZ, 0x10000000); out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000); out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); return 0; } static int ppc440speB_pciex_init_utl(struct ppc4xx_pciex_port *port) { /* Report CRS to the operating system */ out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000); return 0; } static struct ppc4xx_pciex_hwops ppc440speA_pcie_hwops __initdata = { .want_sdr = true, .core_init = ppc440spe_pciex_core_init, .port_init_hw = ppc440speA_pciex_init_port_hw, .setup_utl = ppc440speA_pciex_init_utl, .check_link = ppc4xx_pciex_check_link_sdr, }; static struct ppc4xx_pciex_hwops ppc440speB_pcie_hwops __initdata = { .want_sdr = true, .core_init = ppc440spe_pciex_core_init, .port_init_hw = ppc440speB_pciex_init_port_hw, .setup_utl = ppc440speB_pciex_init_utl, .check_link = ppc4xx_pciex_check_link_sdr, }; static int __init ppc460ex_pciex_core_init(struct device_node *np) { /* Nothing to do, return 2 ports */ return 2; } static int __init ppc460ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port) { u32 val; u32 utlset1; if (port->endpoint) val = PTYPE_LEGACY_ENDPOINT << 20; else val = PTYPE_ROOT_PORT << 20; if (port->index == 0) { val |= LNKW_X1 << 12; utlset1 = 0x20000000; } else { val |= LNKW_X4 << 12; utlset1 = 0x20101101; } mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, utlset1); mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01210000); switch (port->index) { case 0: mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230); mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130); mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006); mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST,0x10000000); break; case 1: mtdcri(SDR0, PESDR1_460EX_L0CDRCTL, 0x00003230); mtdcri(SDR0, PESDR1_460EX_L1CDRCTL, 0x00003230); mtdcri(SDR0, PESDR1_460EX_L2CDRCTL, 0x00003230); mtdcri(SDR0, PESDR1_460EX_L3CDRCTL, 0x00003230); mtdcri(SDR0, PESDR1_460EX_L0DRV, 0x00000130); mtdcri(SDR0, PESDR1_460EX_L1DRV, 0x00000130); mtdcri(SDR0, PESDR1_460EX_L2DRV, 0x00000130); mtdcri(SDR0, PESDR1_460EX_L3DRV, 0x00000130); mtdcri(SDR0, PESDR1_460EX_L0CLK, 0x00000006); mtdcri(SDR0, PESDR1_460EX_L1CLK, 0x00000006); mtdcri(SDR0, PESDR1_460EX_L2CLK, 0x00000006); mtdcri(SDR0, PESDR1_460EX_L3CLK, 0x00000006); mtdcri(SDR0, PESDR1_460EX_PHY_CTL_RST,0x10000000); break; } mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) | (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTPYN)); /* Poll for PHY reset */ /* XXX FIXME add timeout */ switch (port->index) { case 0: while (!(mfdcri(SDR0, PESDR0_460EX_RSTSTA) & 0x1)) udelay(10); break; case 1: while (!(mfdcri(SDR0, PESDR1_460EX_RSTSTA) & 0x1)) udelay(10); break; } mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, (mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) & ~(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL)) | PESDRx_RCSSET_RSTPYN); port->has_ibpre = 1; return ppc4xx_pciex_port_reset_sdr(port); } static int ppc460ex_pciex_init_utl(struct ppc4xx_pciex_port *port) { dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0); /* * Set buffer allocations and then assert VRB and TXE. */ out_be32(port->utl_base + PEUTL_PBCTL, 0x0800000c); out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000); out_be32(port->utl_base + PEUTL_INTR, 0x02000000); out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000); out_be32(port->utl_base + PEUTL_PBBSZ, 0x00000000); out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000); out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000); out_be32(port->utl_base + PEUTL_RCIRQEN,0x00f00000); out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); return 0; } static struct ppc4xx_pciex_hwops ppc460ex_pcie_hwops __initdata = { .want_sdr = true, .core_init = ppc460ex_pciex_core_init, .port_init_hw = ppc460ex_pciex_init_port_hw, .setup_utl = ppc460ex_pciex_init_utl, .check_link = ppc4xx_pciex_check_link_sdr, }; static int __init apm821xx_pciex_core_init(struct device_node *np) { /* Return the number of pcie port */ return 1; } static int __init apm821xx_pciex_init_port_hw(struct ppc4xx_pciex_port *port) { u32 val; /* * Do a software reset on PCIe ports. * This code is to fix the issue that pci drivers doesn't re-assign * bus number for PCIE devices after Uboot * scanned and configured all the buses (eg. PCIE NIC IntelPro/1000 * PT quad port, SAS LSI 1064E) */ mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST, 0x0); mdelay(10); if (port->endpoint) val = PTYPE_LEGACY_ENDPOINT << 20; else val = PTYPE_ROOT_PORT << 20; val |= LNKW_X1 << 12; mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000); mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000); mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230); mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130); mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006); mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST, 0x10000000); mdelay(50); mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST, 0x30000000); mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) | (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTPYN)); /* Poll for PHY reset */ val = PESDR0_460EX_RSTSTA - port->sdr_base; if (ppc4xx_pciex_wait_on_sdr(port, val, 0x1, 1, 100)) { printk(KERN_WARNING "%s: PCIE: Can't reset PHY\n", __func__); return -EBUSY; } else { mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, (mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) & ~(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL)) | PESDRx_RCSSET_RSTPYN); port->has_ibpre = 1; return 0; } } static struct ppc4xx_pciex_hwops apm821xx_pcie_hwops __initdata = { .want_sdr = true, .core_init = apm821xx_pciex_core_init, .port_init_hw = apm821xx_pciex_init_port_hw, .setup_utl = ppc460ex_pciex_init_utl, .check_link = ppc4xx_pciex_check_link_sdr, }; static int __init ppc460sx_pciex_core_init(struct device_node *np) { /* HSS drive amplitude */ mtdcri(SDR0, PESDR0_460SX_HSSL0DAMP, 0xB9843211); mtdcri(SDR0, PESDR0_460SX_HSSL1DAMP, 0xB9843211); mtdcri(SDR0, PESDR0_460SX_HSSL2DAMP, 0xB9843211); mtdcri(SDR0, PESDR0_460SX_HSSL3DAMP, 0xB9843211); mtdcri(SDR0, PESDR0_460SX_HSSL4DAMP, 0xB9843211); mtdcri(SDR0, PESDR0_460SX_HSSL5DAMP, 0xB9843211); mtdcri(SDR0, PESDR0_460SX_HSSL6DAMP, 0xB9843211); mtdcri(SDR0, PESDR0_460SX_HSSL7DAMP, 0xB9843211); mtdcri(SDR0, PESDR1_460SX_HSSL0DAMP, 0xB9843211); mtdcri(SDR0, PESDR1_460SX_HSSL1DAMP, 0xB9843211); mtdcri(SDR0, PESDR1_460SX_HSSL2DAMP, 0xB9843211); mtdcri(SDR0, PESDR1_460SX_HSSL3DAMP, 0xB9843211); mtdcri(SDR0, PESDR2_460SX_HSSL0DAMP, 0xB9843211); mtdcri(SDR0, PESDR2_460SX_HSSL1DAMP, 0xB9843211); mtdcri(SDR0, PESDR2_460SX_HSSL2DAMP, 0xB9843211); mtdcri(SDR0, PESDR2_460SX_HSSL3DAMP, 0xB9843211); /* HSS TX pre-emphasis */ mtdcri(SDR0, PESDR0_460SX_HSSL0COEFA, 0xDCB98987); mtdcri(SDR0, PESDR0_460SX_HSSL1COEFA, 0xDCB98987); mtdcri(SDR0, PESDR0_460SX_HSSL2COEFA, 0xDCB98987); mtdcri(SDR0, PESDR0_460SX_HSSL3COEFA, 0xDCB98987); mtdcri(SDR0, PESDR0_460SX_HSSL4COEFA, 0xDCB98987); mtdcri(SDR0, PESDR0_460SX_HSSL5COEFA, 0xDCB98987); mtdcri(SDR0, PESDR0_460SX_HSSL6COEFA, 0xDCB98987); mtdcri(SDR0, PESDR0_460SX_HSSL7COEFA, 0xDCB98987); mtdcri(SDR0, PESDR1_460SX_HSSL0COEFA, 0xDCB98987); mtdcri(SDR0, PESDR1_460SX_HSSL1COEFA, 0xDCB98987); mtdcri(SDR0, PESDR1_460SX_HSSL2COEFA, 0xDCB98987); mtdcri(SDR0, PESDR1_460SX_HSSL3COEFA, 0xDCB98987); mtdcri(SDR0, PESDR2_460SX_HSSL0COEFA, 0xDCB98987); mtdcri(SDR0, PESDR2_460SX_HSSL1COEFA, 0xDCB98987); mtdcri(SDR0, PESDR2_460SX_HSSL2COEFA, 0xDCB98987); mtdcri(SDR0, PESDR2_460SX_HSSL3COEFA, 0xDCB98987); /* HSS TX calibration control */ mtdcri(SDR0, PESDR0_460SX_HSSL1CALDRV, 0x22222222); mtdcri(SDR0, PESDR1_460SX_HSSL1CALDRV, 0x22220000); mtdcri(SDR0, PESDR2_460SX_HSSL1CALDRV, 0x22220000); /* HSS TX slew control */ mtdcri(SDR0, PESDR0_460SX_HSSSLEW, 0xFFFFFFFF); mtdcri(SDR0, PESDR1_460SX_HSSSLEW, 0xFFFF0000); mtdcri(SDR0, PESDR2_460SX_HSSSLEW, 0xFFFF0000); /* Set HSS PRBS enabled */ mtdcri(SDR0, PESDR0_460SX_HSSCTLSET, 0x00001130); mtdcri(SDR0, PESDR2_460SX_HSSCTLSET, 0x00001130); udelay(100); /* De-assert PLLRESET */ dcri_clrset(SDR0, PESDR0_PLLLCT2, 0x00000100, 0); /* Reset DL, UTL, GPL before configuration */ mtdcri(SDR0, PESDR0_460SX_RCSSET, PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU); mtdcri(SDR0, PESDR1_460SX_RCSSET, PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU); mtdcri(SDR0, PESDR2_460SX_RCSSET, PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU); udelay(100); /* * If bifurcation is not enabled, u-boot would have disabled the * third PCIe port */ if (((mfdcri(SDR0, PESDR1_460SX_HSSCTLSET) & 0x00000001) == 0x00000001)) { printk(KERN_INFO "PCI: PCIE bifurcation setup successfully.\n"); printk(KERN_INFO "PCI: Total 3 PCIE ports are present\n"); return 3; } printk(KERN_INFO "PCI: Total 2 PCIE ports are present\n"); return 2; } static int __init ppc460sx_pciex_init_port_hw(struct ppc4xx_pciex_port *port) { if (port->endpoint) dcri_clrset(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01000000, 0); else dcri_clrset(SDR0, port->sdr_base + PESDRn_UTLSET2, 0, 0x01000000); dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL), PESDRx_RCSSET_RSTPYN); port->has_ibpre = 1; return ppc4xx_pciex_port_reset_sdr(port); } static int ppc460sx_pciex_init_utl(struct ppc4xx_pciex_port *port) { /* Max 128 Bytes */ out_be32 (port->utl_base + PEUTL_PBBSZ, 0x00000000); /* Assert VRB and TXE - per datasheet turn off addr validation */ out_be32(port->utl_base + PEUTL_PCTL, 0x80800000); return 0; } static void __init ppc460sx_pciex_check_link(struct ppc4xx_pciex_port *port) { void __iomem *mbase; int attempt = 50; port->link = 0; mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000); if (mbase == NULL) { printk(KERN_ERR "%pOF: Can't map internal config space !", port->node); return; } while (attempt && (0 == (in_le32(mbase + PECFG_460SX_DLLSTA) & PECFG_460SX_DLLSTA_LINKUP))) { attempt--; mdelay(10); } if (attempt) port->link = 1; iounmap(mbase); } static struct ppc4xx_pciex_hwops ppc460sx_pcie_hwops __initdata = { .want_sdr = true, .core_init = ppc460sx_pciex_core_init, .port_init_hw = ppc460sx_pciex_init_port_hw, .setup_utl = ppc460sx_pciex_init_utl, .check_link = ppc460sx_pciex_check_link, }; #endif /* CONFIG_44x */ #ifdef CONFIG_476FPE static int __init ppc_476fpe_pciex_core_init(struct device_node *np) { return 4; } static void __init ppc_476fpe_pciex_check_link(struct ppc4xx_pciex_port *port) { u32 timeout_ms = 20; u32 val = 0, mask = (PECFG_TLDLP_LNKUP|PECFG_TLDLP_PRESENT); void __iomem *mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000); printk(KERN_INFO "PCIE%d: Checking link...\n", port->index); if (mbase == NULL) { printk(KERN_WARNING "PCIE%d: failed to get cfg space\n", port->index); return; } while (timeout_ms--) { val = in_le32(mbase + PECFG_TLDLP); if ((val & mask) == mask) break; msleep(10); } if (val & PECFG_TLDLP_PRESENT) { printk(KERN_INFO "PCIE%d: link is up !\n", port->index); port->link = 1; } else printk(KERN_WARNING "PCIE%d: Link up failed\n", port->index); iounmap(mbase); } static struct ppc4xx_pciex_hwops ppc_476fpe_pcie_hwops __initdata = { .core_init = ppc_476fpe_pciex_core_init, .check_link = ppc_476fpe_pciex_check_link, }; #endif /* CONFIG_476FPE */ /* Check that the core has been initied and if not, do it */ static int __init ppc4xx_pciex_check_core_init(struct device_node *np) { static int core_init; int count = -ENODEV; if (core_init++) return 0; #ifdef CONFIG_44x if (of_device_is_compatible(np, "ibm,plb-pciex-440spe")) { if (ppc440spe_revA()) ppc4xx_pciex_hwops = &ppc440speA_pcie_hwops; else ppc4xx_pciex_hwops = &ppc440speB_pcie_hwops; } if (of_device_is_compatible(np, "ibm,plb-pciex-460ex")) ppc4xx_pciex_hwops = &ppc460ex_pcie_hwops; if (of_device_is_compatible(np, "ibm,plb-pciex-460sx")) ppc4xx_pciex_hwops = &ppc460sx_pcie_hwops; if (of_device_is_compatible(np, "ibm,plb-pciex-apm821xx")) ppc4xx_pciex_hwops = &apm821xx_pcie_hwops; #endif /* CONFIG_44x */ #ifdef CONFIG_476FPE if (of_device_is_compatible(np, "ibm,plb-pciex-476fpe") || of_device_is_compatible(np, "ibm,plb-pciex-476gtr")) ppc4xx_pciex_hwops = &ppc_476fpe_pcie_hwops; #endif if (ppc4xx_pciex_hwops == NULL) { printk(KERN_WARNING "PCIE: unknown host type %pOF\n", np); return -ENODEV; } count = ppc4xx_pciex_hwops->core_init(np); if (count > 0) { ppc4xx_pciex_ports = kcalloc(count, sizeof(struct ppc4xx_pciex_port), GFP_KERNEL); if (ppc4xx_pciex_ports) { ppc4xx_pciex_port_count = count; return 0; } printk(KERN_WARNING "PCIE: failed to allocate ports array\n"); return -ENOMEM; } return -ENODEV; } static void __init ppc4xx_pciex_port_init_mapping(struct ppc4xx_pciex_port *port) { /* We map PCI Express configuration based on the reg property */ dcr_write(port->dcrs, DCRO_PEGPL_CFGBAH, RES_TO_U32_HIGH(port->cfg_space.start)); dcr_write(port->dcrs, DCRO_PEGPL_CFGBAL, RES_TO_U32_LOW(port->cfg_space.start)); /* XXX FIXME: Use size from reg property. For now, map 512M */ dcr_write(port->dcrs, DCRO_PEGPL_CFGMSK, 0xe0000001); /* We map UTL registers based on the reg property */ dcr_write(port->dcrs, DCRO_PEGPL_REGBAH, RES_TO_U32_HIGH(port->utl_regs.start)); dcr_write(port->dcrs, DCRO_PEGPL_REGBAL, RES_TO_U32_LOW(port->utl_regs.start)); /* XXX FIXME: Use size from reg property */ dcr_write(port->dcrs, DCRO_PEGPL_REGMSK, 0x00007001); /* Disable all other outbound windows */ dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, 0); dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, 0); dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, 0); dcr_write(port->dcrs, DCRO_PEGPL_MSGMSK, 0); } static int __init ppc4xx_pciex_port_init(struct ppc4xx_pciex_port *port) { int rc = 0; /* Init HW */ if (ppc4xx_pciex_hwops->port_init_hw) rc = ppc4xx_pciex_hwops->port_init_hw(port); if (rc != 0) return rc; /* * Initialize mapping: disable all regions and configure * CFG and REG regions based on resources in the device tree */ ppc4xx_pciex_port_init_mapping(port); if (ppc4xx_pciex_hwops->check_link) ppc4xx_pciex_hwops->check_link(port); /* * Map UTL */ port->utl_base = ioremap(port->utl_regs.start, 0x100); BUG_ON(port->utl_base == NULL); /* * Setup UTL registers --BenH. */ if (ppc4xx_pciex_hwops->setup_utl) ppc4xx_pciex_hwops->setup_utl(port); /* * Check for VC0 active or PLL Locked and assert RDY. */ if (port->sdr_base) { if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx")){ if (port->link && ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1 << 12, 1 << 12, 5000)) { printk(KERN_INFO "PCIE%d: PLL not locked\n", port->index); port->link = 0; } } else if (port->link && ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1 << 16, 1 << 16, 5000)) { printk(KERN_INFO "PCIE%d: VC0 not active\n", port->index); port->link = 0; } dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, 0, 1 << 20); } msleep(100); return 0; } static int ppc4xx_pciex_validate_bdf(struct ppc4xx_pciex_port *port, struct pci_bus *bus, unsigned int devfn) { static int message; /* Endpoint can not generate upstream(remote) config cycles */ if (port->endpoint && bus->number != port->hose->first_busno) return PCIBIOS_DEVICE_NOT_FOUND; /* Check we are within the mapped range */ if (bus->number > port->hose->last_busno) { if (!message) { printk(KERN_WARNING "Warning! Probing bus %u" " out of range !\n", bus->number); message++; } return PCIBIOS_DEVICE_NOT_FOUND; } /* The root complex has only one device / function */ if (bus->number == port->hose->first_busno && devfn != 0) return PCIBIOS_DEVICE_NOT_FOUND; /* The other side of the RC has only one device as well */ if (bus->number == (port->hose->first_busno + 1) && PCI_SLOT(devfn) != 0) return PCIBIOS_DEVICE_NOT_FOUND; /* Check if we have a link */ if ((bus->number != port->hose->first_busno) && !port->link) return PCIBIOS_DEVICE_NOT_FOUND; return 0; } static void __iomem *ppc4xx_pciex_get_config_base(struct ppc4xx_pciex_port *port, struct pci_bus *bus, unsigned int devfn) { int relbus; /* Remove the casts when we finally remove the stupid volatile * in struct pci_controller */ if (bus->number == port->hose->first_busno) return (void __iomem *)port->hose->cfg_addr; relbus = bus->number - (port->hose->first_busno + 1); return (void __iomem *)port->hose->cfg_data + ((relbus << 20) | (devfn << 12)); } static int ppc4xx_pciex_read_config(struct pci_bus *bus, unsigned int devfn, int offset, int len, u32 *val) { struct pci_controller *hose = pci_bus_to_host(bus); struct ppc4xx_pciex_port *port = &ppc4xx_pciex_ports[hose->indirect_type]; void __iomem *addr; u32 gpl_cfg; BUG_ON(hose != port->hose); if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0) return PCIBIOS_DEVICE_NOT_FOUND; addr = ppc4xx_pciex_get_config_base(port, bus, devfn); /* * Reading from configuration space of non-existing device can * generate transaction errors. For the read duration we suppress * assertion of machine check exceptions to avoid those. */ gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG); dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA); /* Make sure no CRS is recorded */ out_be32(port->utl_base + PEUTL_RCSTA, 0x00040000); switch (len) { case 1: *val = in_8((u8 *)(addr + offset)); break; case 2: *val = in_le16((u16 *)(addr + offset)); break; default: *val = in_le32((u32 *)(addr + offset)); break; } pr_debug("pcie-config-read: bus=%3d [%3d..%3d] devfn=0x%04x" " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n", bus->number, hose->first_busno, hose->last_busno, devfn, offset, len, addr + offset, *val); /* Check for CRS (440SPe rev B does that for us but heh ..) */ if (in_be32(port->utl_base + PEUTL_RCSTA) & 0x00040000) { pr_debug("Got CRS !\n"); if (len != 4 || offset != 0) return PCIBIOS_DEVICE_NOT_FOUND; *val = 0xffff0001; } dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg); return PCIBIOS_SUCCESSFUL; } static int ppc4xx_pciex_write_config(struct pci_bus *bus, unsigned int devfn, int offset, int len, u32 val) { struct pci_controller *hose = pci_bus_to_host(bus); struct ppc4xx_pciex_port *port = &ppc4xx_pciex_ports[hose->indirect_type]; void __iomem *addr; u32 gpl_cfg; if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0) return PCIBIOS_DEVICE_NOT_FOUND; addr = ppc4xx_pciex_get_config_base(port, bus, devfn); /* * Reading from configuration space of non-existing device can * generate transaction errors. For the read duration we suppress * assertion of machine check exceptions to avoid those. */ gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG); dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA); pr_debug("pcie-config-write: bus=%3d [%3d..%3d] devfn=0x%04x" " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n", bus->number, hose->first_busno, hose->last_busno, devfn, offset, len, addr + offset, val); switch (len) { case 1: out_8((u8 *)(addr + offset), val); break; case 2: out_le16((u16 *)(addr + offset), val); break; default: out_le32((u32 *)(addr + offset), val); break; } dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg); return PCIBIOS_SUCCESSFUL; } static struct pci_ops ppc4xx_pciex_pci_ops = { .read = ppc4xx_pciex_read_config, .write = ppc4xx_pciex_write_config, }; static int __init ppc4xx_setup_one_pciex_POM(struct ppc4xx_pciex_port *port, struct pci_controller *hose, void __iomem *mbase, u64 plb_addr, u64 pci_addr, u64 size, unsigned int flags, int index) { u32 lah, lal, pciah, pcial, sa; if (!is_power_of_2(size) || (index < 2 && size < 0x100000) || (index == 2 && size < 0x100) || (plb_addr & (size - 1)) != 0) { printk(KERN_WARNING "%pOF: Resource out of range\n", hose->dn); return -1; } /* Calculate register values */ lah = RES_TO_U32_HIGH(plb_addr); lal = RES_TO_U32_LOW(plb_addr); pciah = RES_TO_U32_HIGH(pci_addr); pcial = RES_TO_U32_LOW(pci_addr); sa = (0xffffffffu << ilog2(size)) | 0x1; /* Program register values */ switch (index) { case 0: out_le32(mbase + PECFG_POM0LAH, pciah); out_le32(mbase + PECFG_POM0LAL, pcial); dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAH, lah); dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAL, lal); dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKH, 0x7fffffff); /*Enabled and single region */ if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx")) dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, sa | DCRO_PEGPL_460SX_OMR1MSKL_UOT | DCRO_PEGPL_OMRxMSKL_VAL); else if (of_device_is_compatible( port->node, "ibm,plb-pciex-476fpe") || of_device_is_compatible( port->node, "ibm,plb-pciex-476gtr")) dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, sa | DCRO_PEGPL_476FPE_OMR1MSKL_UOT | DCRO_PEGPL_OMRxMSKL_VAL); else dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, sa | DCRO_PEGPL_OMR1MSKL_UOT | DCRO_PEGPL_OMRxMSKL_VAL); break; case 1: out_le32(mbase + PECFG_POM1LAH, pciah); out_le32(mbase + PECFG_POM1LAL, pcial); dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAH, lah); dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAL, lal); dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKH, 0x7fffffff); dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, sa | DCRO_PEGPL_OMRxMSKL_VAL); break; case 2: out_le32(mbase + PECFG_POM2LAH, pciah); out_le32(mbase + PECFG_POM2LAL, pcial); dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAH, lah); dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAL, lal); dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKH, 0x7fffffff); /* Note that 3 here means enabled | IO space !!! */ dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, sa | DCRO_PEGPL_OMR3MSKL_IO | DCRO_PEGPL_OMRxMSKL_VAL); break; } return 0; } static void __init ppc4xx_configure_pciex_POMs(struct ppc4xx_pciex_port *port, struct pci_controller *hose, void __iomem *mbase) { int i, j, found_isa_hole = 0; /* Setup outbound memory windows */ for (i = j = 0; i < 3; i++) { struct resource *res = &hose->mem_resources[i]; resource_size_t offset = hose->mem_offset[i]; /* we only care about memory windows */ if (!(res->flags & IORESOURCE_MEM)) continue; if (j > 1) { printk(KERN_WARNING "%pOF: Too many ranges\n", port->node); break; } /* Configure the resource */ if (ppc4xx_setup_one_pciex_POM(port, hose, mbase, res->start, res->start - offset, resource_size(res), res->flags, j) == 0) { j++; /* If the resource PCI address is 0 then we have our * ISA memory hole */ if (res->start == offset) found_isa_hole = 1; } } /* Handle ISA memory hole if not already covered */ if (j <= 1 && !found_isa_hole && hose->isa_mem_size) if (ppc4xx_setup_one_pciex_POM(port, hose, mbase, hose->isa_mem_phys, 0, hose->isa_mem_size, 0, j) == 0) printk(KERN_INFO "%pOF: Legacy ISA memory support enabled\n", hose->dn); /* Configure IO, always 64K starting at 0. We hard wire it to 64K ! * Note also that it -has- to be region index 2 on this HW */ if (hose->io_resource.flags & IORESOURCE_IO) ppc4xx_setup_one_pciex_POM(port, hose, mbase, hose->io_base_phys, 0, 0x10000, IORESOURCE_IO, 2); } static void __init ppc4xx_configure_pciex_PIMs(struct ppc4xx_pciex_port *port, struct pci_controller *hose, void __iomem *mbase, struct resource *res) { resource_size_t size = resource_size(res); u64 sa; if (port->endpoint) { resource_size_t ep_addr = 0; resource_size_t ep_size = 32 << 20; /* Currently we map a fixed 64MByte window to PLB address * 0 (SDRAM). This should probably be configurable via a dts * property. */ /* Calculate window size */ sa = (0xffffffffffffffffull << ilog2(ep_size)); /* Setup BAR0 */ out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa)); out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa) | PCI_BASE_ADDRESS_MEM_TYPE_64); /* Disable BAR1 & BAR2 */ out_le32(mbase + PECFG_BAR1MPA, 0); out_le32(mbase + PECFG_BAR2HMPA, 0); out_le32(mbase + PECFG_BAR2LMPA, 0); out_le32(mbase + PECFG_PIM01SAH, RES_TO_U32_HIGH(sa)); out_le32(mbase + PECFG_PIM01SAL, RES_TO_U32_LOW(sa)); out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(ep_addr)); out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(ep_addr)); } else { /* Calculate window size */ sa = (0xffffffffffffffffull << ilog2(size)); if (res->flags & IORESOURCE_PREFETCH) sa |= PCI_BASE_ADDRESS_MEM_PREFETCH; if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx") || of_device_is_compatible( port->node, "ibm,plb-pciex-476fpe") || of_device_is_compatible( port->node, "ibm,plb-pciex-476gtr")) sa |= PCI_BASE_ADDRESS_MEM_TYPE_64; out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa)); out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa)); /* The setup of the split looks weird to me ... let's see * if it works */ out_le32(mbase + PECFG_PIM0LAL, 0x00000000); out_le32(mbase + PECFG_PIM0LAH, 0x00000000); out_le32(mbase + PECFG_PIM1LAL, 0x00000000); out_le32(mbase + PECFG_PIM1LAH, 0x00000000); out_le32(mbase + PECFG_PIM01SAH, 0xffff0000); out_le32(mbase + PECFG_PIM01SAL, 0x00000000); out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(res->start)); out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(res->start)); } /* Enable inbound mapping */ out_le32(mbase + PECFG_PIMEN, 0x1); /* Enable I/O, Mem, and Busmaster cycles */ out_le16(mbase + PCI_COMMAND, in_le16(mbase + PCI_COMMAND) | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); } static void __init ppc4xx_pciex_port_setup_hose(struct ppc4xx_pciex_port *port) { struct resource dma_window; struct pci_controller *hose = NULL; const int *bus_range; int primary, busses; void __iomem *mbase = NULL, *cfg_data = NULL; const u32 *pval; u32 val; /* Check if primary bridge */ primary = of_property_read_bool(port->node, "primary"); /* Get bus range if any */ bus_range = of_get_property(port->node, "bus-range", NULL); /* Allocate the host controller data structure */ hose = pcibios_alloc_controller(port->node); if (!hose) goto fail; /* We stick the port number in "indirect_type" so the config space * ops can retrieve the port data structure easily */ hose->indirect_type = port->index; /* Get bus range */ hose->first_busno = bus_range ? bus_range[0] : 0x0; hose->last_busno = bus_range ? bus_range[1] : 0xff; /* Because of how big mapping the config space is (1M per bus), we * limit how many busses we support. In the long run, we could replace * that with something akin to kmap_atomic instead. We set aside 1 bus * for the host itself too. */ busses = hose->last_busno - hose->first_busno; /* This is off by 1 */ if (busses > MAX_PCIE_BUS_MAPPED) { busses = MAX_PCIE_BUS_MAPPED; hose->last_busno = hose->first_busno + busses; } if (!port->endpoint) { /* Only map the external config space in cfg_data for * PCIe root-complexes. External space is 1M per bus */ cfg_data = ioremap(port->cfg_space.start + (hose->first_busno + 1) * 0x100000, busses * 0x100000); if (cfg_data == NULL) { printk(KERN_ERR "%pOF: Can't map external config space !", port->node); goto fail; } hose->cfg_data = cfg_data; } /* Always map the host config space in cfg_addr. * Internal space is 4K */ mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000); if (mbase == NULL) { printk(KERN_ERR "%pOF: Can't map internal config space !", port->node); goto fail; } hose->cfg_addr = mbase; pr_debug("PCIE %pOF, bus %d..%d\n", port->node, hose->first_busno, hose->last_busno); pr_debug(" config space mapped at: root @0x%p, other @0x%p\n", hose->cfg_addr, hose->cfg_data); /* Setup config space */ hose->ops = &ppc4xx_pciex_pci_ops; port->hose = hose; mbase = (void __iomem *)hose->cfg_addr; if (!port->endpoint) { /* * Set bus numbers on our root port */ out_8(mbase + PCI_PRIMARY_BUS, hose->first_busno); out_8(mbase + PCI_SECONDARY_BUS, hose->first_busno + 1); out_8(mbase + PCI_SUBORDINATE_BUS, hose->last_busno); } /* * OMRs are already reset, also disable PIMs */ out_le32(mbase + PECFG_PIMEN, 0); /* Parse outbound mapping resources */ pci_process_bridge_OF_ranges(hose, port->node, primary); /* Parse inbound mapping resources */ if (ppc4xx_parse_dma_ranges(hose, mbase, &dma_window) != 0) goto fail; /* Configure outbound ranges POMs */ ppc4xx_configure_pciex_POMs(port, hose, mbase); /* Configure inbound ranges PIMs */ ppc4xx_configure_pciex_PIMs(port, hose, mbase, &dma_window); /* The root complex doesn't show up if we don't set some vendor * and device IDs into it. The defaults below are the same bogus * one that the initial code in arch/ppc had. This can be * overwritten by setting the "vendor-id/device-id" properties * in the pciex node. */ /* Get the (optional) vendor-/device-id from the device-tree */ pval = of_get_property(port->node, "vendor-id", NULL); if (pval) { val = *pval; } else { if (!port->endpoint) val = 0xaaa0 + port->index; else val = 0xeee0 + port->index; } out_le16(mbase + 0x200, val); pval = of_get_property(port->node, "device-id", NULL); if (pval) { val = *pval; } else { if (!port->endpoint) val = 0xbed0 + port->index; else val = 0xfed0 + port->index; } out_le16(mbase + 0x202, val); /* Enable Bus master, memory, and io space */ if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx")) out_le16(mbase + 0x204, 0x7); if (!port->endpoint) { /* Set Class Code to PCI-PCI bridge and Revision Id to 1 */ out_le32(mbase + 0x208, 0x06040001); printk(KERN_INFO "PCIE%d: successfully set as root-complex\n", port->index); } else { /* Set Class Code to Processor/PPC */ out_le32(mbase + 0x208, 0x0b200001); printk(KERN_INFO "PCIE%d: successfully set as endpoint\n", port->index); } return; fail: if (hose) pcibios_free_controller(hose); if (cfg_data) iounmap(cfg_data); if (mbase) iounmap(mbase); } static void __init ppc4xx_probe_pciex_bridge(struct device_node *np) { struct ppc4xx_pciex_port *port; const u32 *pval; int portno; unsigned int dcrs; /* First, proceed to core initialization as we assume there's * only one PCIe core in the system */ if (ppc4xx_pciex_check_core_init(np)) return; /* Get the port number from the device-tree */ pval = of_get_property(np, "port", NULL); if (pval == NULL) { printk(KERN_ERR "PCIE: Can't find port number for %pOF\n", np); return; } portno = *pval; if (portno >= ppc4xx_pciex_port_count) { printk(KERN_ERR "PCIE: port number out of range for %pOF\n", np); return; } port = &ppc4xx_pciex_ports[portno]; port->index = portno; /* * Check if device is enabled */ if (!of_device_is_available(np)) { printk(KERN_INFO "PCIE%d: Port disabled via device-tree\n", port->index); return; } port->node = of_node_get(np); if (ppc4xx_pciex_hwops->want_sdr) { pval = of_get_property(np, "sdr-base", NULL); if (pval == NULL) { printk(KERN_ERR "PCIE: missing sdr-base for %pOF\n", np); return; } port->sdr_base = *pval; } /* Check if device_type property is set to "pci" or "pci-endpoint". * Resulting from this setup this PCIe port will be configured * as root-complex or as endpoint. */ if (of_node_is_type(port->node, "pci-endpoint")) { port->endpoint = 1; } else if (of_node_is_type(port->node, "pci")) { port->endpoint = 0; } else { printk(KERN_ERR "PCIE: missing or incorrect device_type for %pOF\n", np); return; } /* Fetch config space registers address */ if (of_address_to_resource(np, 0, &port->cfg_space)) { printk(KERN_ERR "%pOF: Can't get PCI-E config space !", np); return; } /* Fetch host bridge internal registers address */ if (of_address_to_resource(np, 1, &port->utl_regs)) { printk(KERN_ERR "%pOF: Can't get UTL register base !", np); return; } /* Map DCRs */ dcrs = dcr_resource_start(np, 0); if (dcrs == 0) { printk(KERN_ERR "%pOF: Can't get DCR register base !", np); return; } port->dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0)); /* Initialize the port specific registers */ if (ppc4xx_pciex_port_init(port)) { printk(KERN_WARNING "PCIE%d: Port init failed\n", port->index); return; } /* Setup the linux hose data structure */ ppc4xx_pciex_port_setup_hose(port); } #endif /* CONFIG_PPC4xx_PCI_EXPRESS */ static int __init ppc4xx_pci_find_bridges(void) { struct device_node *np; pci_add_flags(PCI_ENABLE_PROC_DOMAINS | PCI_COMPAT_DOMAIN_0); #ifdef CONFIG_PPC4xx_PCI_EXPRESS for_each_compatible_node(np, NULL, "ibm,plb-pciex") ppc4xx_probe_pciex_bridge(np); #endif for_each_compatible_node(np, NULL, "ibm,plb-pcix") ppc4xx_probe_pcix_bridge(np); for_each_compatible_node(np, NULL, "ibm,plb-pci") ppc4xx_probe_pci_bridge(np); return 0; } arch_initcall(ppc4xx_pci_find_bridges);
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