/*
 * 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/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;
        int i;

        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
         */
        for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
                dev->resource[i].start = dev->resource[i].end = 0;
                dev->resource[i].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;
        const u32 *ranges;
        int rlen;
        int pna = of_n_addr_cells(hose->dn);
        int np = pna + 5;

        /* Default */
        res->start = 0;
        size = 0x80000000;
        res->end = size - 1;
        res->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH;

        /* Get dma-ranges property */
        ranges = of_get_property(hose->dn, "dma-ranges", &rlen);
        if (ranges == NULL)
                goto out;

        /* Walk it */
        while ((rlen -= np * 4) >= 0) {
                u32 pci_space = ranges[0];
                u64 pci_addr = of_read_number(ranges + 1, 2);
                u64 cpu_addr = of_translate_dma_address(hose->dn, ranges + 3);
                size = of_read_number(ranges + pna + 3, 2);
                ranges += np;
                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_get_property(np, "primary", NULL))
                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 = 0, msi = 0, primary = 0;

        /* 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) */
        if (of_get_property(np, "large-inbound-windows", NULL))
                big_pim = 1;

        /* Check if we should enable MSIs inbound hole */
        if (of_get_property(np, "enable-msi-hole", NULL))
                msi = 1;

        /* Check if primary bridge */
        if (of_get_property(np, "primary", NULL))
                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,
                                        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);
                goto done;
        }

        while (attempt && (0 == (in_le32(mbase + PECFG_460SX_DLLSTA)
                        & PECFG_460SX_DLLSTA_LINKUP))) {
                attempt--;
                mdelay(10);
        }
        if (attempt)
                port->link = 1;
done:
        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_40x

static int __init ppc405ex_pciex_core_init(struct device_node *np)
{
        /* Nothing to do, return 2 ports */
        return 2;
}

static void ppc405ex_pcie_phy_reset(struct ppc4xx_pciex_port *port)
{
        /* Assert the PE0_PHY reset */
        mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01010000);
        msleep(1);

        /* deassert the PE0_hotreset */
        if (port->endpoint)
                mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01111000);
        else
                mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01101000);

        /* poll for phy !reset */
        /* XXX FIXME add timeout */
        while (!(mfdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSTA) & 0x00001000))
                ;

        /* deassert the PE0_gpl_utl_reset */
        mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x00101000);
}

static int __init ppc405ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
{
        u32 val;

        if (port->endpoint)
                val = PTYPE_LEGACY_ENDPOINT;
        else
                val = PTYPE_ROOT_PORT;

        mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET,
               1 << 24 | val << 20 | LNKW_X1 << 12);

        mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000);
        mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000);
        mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET1, 0x720F0000);
        mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET2, 0x70600003);

        /*
         * Only reset the PHY when no link is currently established.
         * This is for the Atheros PCIe board which has problems to establish
         * the link (again) after this PHY reset. All other currently tested
         * PCIe boards don't show this problem.
         * This has to be re-tested and fixed in a later release!
         */
        val = mfdcri(SDR0, port->sdr_base + PESDRn_LOOP);
        if (!(val & 0x00001000))
                ppc405ex_pcie_phy_reset(port);

        dcr_write(port->dcrs, DCRO_PEGPL_CFG, 0x10000000);  /* guarded on */

        port->has_ibpre = 1;

        return ppc4xx_pciex_port_reset_sdr(port);
}

static int ppc405ex_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_OUTTR,   0x02000000);
        out_be32(port->utl_base + PEUTL_INTR,    0x02000000);
        out_be32(port->utl_base + PEUTL_OPDBSZ,  0x04000000);
        out_be32(port->utl_base + PEUTL_PBBSZ,   0x21000000);
        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);

        out_be32(port->utl_base + PEUTL_PBCTL,   0x08000000);

        return 0;
}

static struct ppc4xx_pciex_hwops ppc405ex_pcie_hwops __initdata =
{
        .want_sdr       = true,
        .core_init      = ppc405ex_pciex_core_init,
        .port_init_hw   = ppc405ex_pciex_init_port_hw,
        .setup_utl      = ppc405ex_pciex_init_utl,
        .check_link     = ppc4xx_pciex_check_link_sdr,
};

#endif /* CONFIG_40x */

#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);
        return;
}

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_40x
        if (of_device_is_compatible(np, "ibm,plb-pciex-405ex"))
                ppc4xx_pciex_hwops = &ppc405ex_pcie_hwops;
#endif
#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 =
                       kzalloc(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 = 0, busses;
        void __iomem *mbase = NULL, *cfg_data = NULL;
        const u32 *pval;
        u32 val;

        /* Check if primary bridge */
        if (of_get_property(port->node, "primary", NULL))
                primary = 1;

        /* 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;
        const char *val;

        /* 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.
         */
        val = of_get_property(port->node, "device_type", NULL);
        if (!strcmp(val, "pci-endpoint")) {
                port->endpoint = 1;
        } else if (!strcmp(val, "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);