/*
 * Sonics Silicon Backplane
 * Broadcom PCI-core driver
 *
 * Copyright 2005, Broadcom Corporation
 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */

#include "ssb_private.h"

#include <linux/ssb/ssb.h>
#include <linux/pci.h>
#include <linux/export.h>
#include <linux/delay.h>
#include <linux/ssb/ssb_embedded.h>

static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address);
static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data);
static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address);
static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device,
                                u8 address, u16 data);

static inline
u32 pcicore_read32(struct ssb_pcicore *pc, u16 offset)
{
        return ssb_read32(pc->dev, offset);
}

static inline
void pcicore_write32(struct ssb_pcicore *pc, u16 offset, u32 value)
{
        ssb_write32(pc->dev, offset, value);
}

static inline
u16 pcicore_read16(struct ssb_pcicore *pc, u16 offset)
{
        return ssb_read16(pc->dev, offset);
}

static inline
void pcicore_write16(struct ssb_pcicore *pc, u16 offset, u16 value)
{
        ssb_write16(pc->dev, offset, value);
}

/**************************************************
 * Code for hostmode operation.
 **************************************************/

#ifdef CONFIG_SSB_PCICORE_HOSTMODE

#include <asm/paccess.h>
/* Probe a 32bit value on the bus and catch bus exceptions.
 * Returns nonzero on a bus exception.
 * This is MIPS specific */
#define mips_busprobe32(val, addr)      get_dbe((val), ((u32 *)(addr)))

/* Assume one-hot slot wiring */
#define SSB_PCI_SLOT_MAX        16

/* Global lock is OK, as we won't have more than one extpci anyway. */
static DEFINE_SPINLOCK(cfgspace_lock);
/* Core to access the external PCI config space. Can only have one. */
static struct ssb_pcicore *extpci_core;


static u32 get_cfgspace_addr(struct ssb_pcicore *pc,
                             unsigned int bus, unsigned int dev,
                             unsigned int func, unsigned int off)
{
        u32 addr = 0;
        u32 tmp;

        /* We do only have one cardbus device behind the bridge. */
        if (pc->cardbusmode && (dev > 1))
                goto out;

        if (bus == 0) {
                /* Type 0 transaction */
                if (unlikely(dev >= SSB_PCI_SLOT_MAX))
                        goto out;
                /* Slide the window */
                tmp = SSB_PCICORE_SBTOPCI_CFG0;
                tmp |= ((1 << (dev + 16)) & SSB_PCICORE_SBTOPCI1_MASK);
                pcicore_write32(pc, SSB_PCICORE_SBTOPCI1, tmp);
                /* Calculate the address */
                addr = SSB_PCI_CFG;
                addr |= ((1 << (dev + 16)) & ~SSB_PCICORE_SBTOPCI1_MASK);
                addr |= (func << 8);
                addr |= (off & ~3);
        } else {
                /* Type 1 transaction */
                pcicore_write32(pc, SSB_PCICORE_SBTOPCI1,
                                SSB_PCICORE_SBTOPCI_CFG1);
                /* Calculate the address */
                addr = SSB_PCI_CFG;
                addr |= (bus << 16);
                addr |= (dev << 11);
                addr |= (func << 8);
                addr |= (off & ~3);
        }
out:
        return addr;
}

static int ssb_extpci_read_config(struct ssb_pcicore *pc,
                                  unsigned int bus, unsigned int dev,
                                  unsigned int func, unsigned int off,
                                  void *buf, int len)
{
        int err = -EINVAL;
        u32 addr, val;
        void __iomem *mmio;

        WARN_ON(!pc->hostmode);
        if (unlikely(len != 1 && len != 2 && len != 4))
                goto out;
        addr = get_cfgspace_addr(pc, bus, dev, func, off);
        if (unlikely(!addr))
                goto out;
        err = -ENOMEM;
        mmio = ioremap_nocache(addr, len);
        if (!mmio)
                goto out;

        if (mips_busprobe32(val, mmio)) {
                val = 0xffffffff;
                goto unmap;
        }

        val = readl(mmio);
        val >>= (8 * (off & 3));

        switch (len) {
        case 1:
                *((u8 *)buf) = (u8)val;
                break;
        case 2:
                *((u16 *)buf) = (u16)val;
                break;
        case 4:
                *((u32 *)buf) = (u32)val;
                break;
        }
        err = 0;
unmap:
        iounmap(mmio);
out:
        return err;
}

static int ssb_extpci_write_config(struct ssb_pcicore *pc,
                                   unsigned int bus, unsigned int dev,
                                   unsigned int func, unsigned int off,
                                   const void *buf, int len)
{
        int err = -EINVAL;
        u32 addr, val = 0;
        void __iomem *mmio;

        WARN_ON(!pc->hostmode);
        if (unlikely(len != 1 && len != 2 && len != 4))
                goto out;
        addr = get_cfgspace_addr(pc, bus, dev, func, off);
        if (unlikely(!addr))
                goto out;
        err = -ENOMEM;
        mmio = ioremap_nocache(addr, len);
        if (!mmio)
                goto out;

        if (mips_busprobe32(val, mmio)) {
                val = 0xffffffff;
                goto unmap;
        }

        switch (len) {
        case 1:
                val = readl(mmio);
                val &= ~(0xFF << (8 * (off & 3)));
                val |= *((const u8 *)buf) << (8 * (off & 3));
                break;
        case 2:
                val = readl(mmio);
                val &= ~(0xFFFF << (8 * (off & 3)));
                val |= *((const u16 *)buf) << (8 * (off & 3));
                break;
        case 4:
                val = *((const u32 *)buf);
                break;
        }
        writel(val, mmio);

        err = 0;
unmap:
        iounmap(mmio);
out:
        return err;
}

static int ssb_pcicore_read_config(struct pci_bus *bus, unsigned int devfn,
                                   int reg, int size, u32 *val)
{
        unsigned long flags;
        int err;

        spin_lock_irqsave(&cfgspace_lock, flags);
        err = ssb_extpci_read_config(extpci_core, bus->number, PCI_SLOT(devfn),
                                     PCI_FUNC(devfn), reg, val, size);
        spin_unlock_irqrestore(&cfgspace_lock, flags);

        return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
}

static int ssb_pcicore_write_config(struct pci_bus *bus, unsigned int devfn,
                                    int reg, int size, u32 val)
{
        unsigned long flags;
        int err;

        spin_lock_irqsave(&cfgspace_lock, flags);
        err = ssb_extpci_write_config(extpci_core, bus->number, PCI_SLOT(devfn),
                                      PCI_FUNC(devfn), reg, &val, size);
        spin_unlock_irqrestore(&cfgspace_lock, flags);

        return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
}

static struct pci_ops ssb_pcicore_pciops = {
        .read   = ssb_pcicore_read_config,
        .write  = ssb_pcicore_write_config,
};

static struct resource ssb_pcicore_mem_resource = {
        .name   = "SSB PCIcore external memory",
        .start  = SSB_PCI_DMA,
        .end    = SSB_PCI_DMA + SSB_PCI_DMA_SZ - 1,
        .flags  = IORESOURCE_MEM | IORESOURCE_PCI_FIXED,
};

static struct resource ssb_pcicore_io_resource = {
        .name   = "SSB PCIcore external I/O",
        .start  = 0x100,
        .end    = 0x7FF,
        .flags  = IORESOURCE_IO | IORESOURCE_PCI_FIXED,
};

static struct pci_controller ssb_pcicore_controller = {
        .pci_ops        = &ssb_pcicore_pciops,
        .io_resource    = &ssb_pcicore_io_resource,
        .mem_resource   = &ssb_pcicore_mem_resource,
};

/* This function is called when doing a pci_enable_device().
 * We must first check if the device is a device on the PCI-core bridge. */
int ssb_pcicore_plat_dev_init(struct pci_dev *d)
{
        if (d->bus->ops != &ssb_pcicore_pciops) {
                /* This is not a device on the PCI-core bridge. */
                return -ENODEV;
        }

        dev_info(&d->dev, "PCI: Fixing up device %s\n", pci_name(d));

        /* Fix up interrupt lines */
        d->irq = ssb_mips_irq(extpci_core->dev) + 2;
        pci_write_config_byte(d, PCI_INTERRUPT_LINE, d->irq);

        return 0;
}

/* Early PCI fixup for a device on the PCI-core bridge. */
static void ssb_pcicore_fixup_pcibridge(struct pci_dev *dev)
{
        u8 lat;

        if (dev->bus->ops != &ssb_pcicore_pciops) {
                /* This is not a device on the PCI-core bridge. */
                return;
        }
        if (dev->bus->number != 0 || PCI_SLOT(dev->devfn) != 0)
                return;

        dev_info(&dev->dev, "PCI: Fixing up bridge %s\n", pci_name(dev));

        /* Enable PCI bridge bus mastering and memory space */
        pci_set_master(dev);
        if (pcibios_enable_device(dev, ~0) < 0) {
                dev_err(&dev->dev, "PCI: SSB bridge enable failed\n");
                return;
        }

        /* Enable PCI bridge BAR1 prefetch and burst */
        pci_write_config_dword(dev, SSB_BAR1_CONTROL, 3);

        /* Make sure our latency is high enough to handle the devices behind us */
        lat = 168;
        dev_info(&dev->dev,
                 "PCI: Fixing latency timer of device %s to %u\n",
                 pci_name(dev), lat);
        pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
}
DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, ssb_pcicore_fixup_pcibridge);

/* PCI device IRQ mapping. */
int ssb_pcicore_pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
        if (dev->bus->ops != &ssb_pcicore_pciops) {
                /* This is not a device on the PCI-core bridge. */
                return -ENODEV;
        }
        return ssb_mips_irq(extpci_core->dev) + 2;
}

static void ssb_pcicore_init_hostmode(struct ssb_pcicore *pc)
{
        u32 val;

        if (WARN_ON(extpci_core))
                return;
        extpci_core = pc;

        dev_dbg(pc->dev->dev, "PCIcore in host mode found\n");
        /* Reset devices on the external PCI bus */
        val = SSB_PCICORE_CTL_RST_OE;
        val |= SSB_PCICORE_CTL_CLK_OE;
        pcicore_write32(pc, SSB_PCICORE_CTL, val);
        val |= SSB_PCICORE_CTL_CLK; /* Clock on */
        pcicore_write32(pc, SSB_PCICORE_CTL, val);
        udelay(150); /* Assertion time demanded by the PCI standard */
        val |= SSB_PCICORE_CTL_RST; /* Deassert RST# */
        pcicore_write32(pc, SSB_PCICORE_CTL, val);
        val = SSB_PCICORE_ARBCTL_INTERN;
        pcicore_write32(pc, SSB_PCICORE_ARBCTL, val);
        udelay(1); /* Assertion time demanded by the PCI standard */

        if (pc->dev->bus->has_cardbus_slot) {
                dev_dbg(pc->dev->dev, "CardBus slot detected\n");
                pc->cardbusmode = 1;
                /* GPIO 1 resets the bridge */
                ssb_gpio_out(pc->dev->bus, 1, 1);
                ssb_gpio_outen(pc->dev->bus, 1, 1);
                pcicore_write16(pc, SSB_PCICORE_SPROM(0),
                                pcicore_read16(pc, SSB_PCICORE_SPROM(0))
                                | 0x0400);
        }

        /* 64MB I/O window */
        pcicore_write32(pc, SSB_PCICORE_SBTOPCI0,
                        SSB_PCICORE_SBTOPCI_IO);
        /* 64MB config space */
        pcicore_write32(pc, SSB_PCICORE_SBTOPCI1,
                        SSB_PCICORE_SBTOPCI_CFG0);
        /* 1GB memory window */
        pcicore_write32(pc, SSB_PCICORE_SBTOPCI2,
                        SSB_PCICORE_SBTOPCI_MEM | SSB_PCI_DMA);

        /*
         * Accessing PCI config without a proper delay after devices reset (not
         * GPIO reset) was causing reboots on WRT300N v1.0 (BCM4704).
         * Tested delay 850 us lowered reboot chance to 50-80%, 1000 us fixed it
         * completely. Flushing all writes was also tested but with no luck.
         * The same problem was reported for WRT350N v1 (BCM4705), so we just
         * sleep here unconditionally.
         */
        usleep_range(1000, 2000);

        /* Enable PCI bridge BAR0 prefetch and burst */
        val = PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
        ssb_extpci_write_config(pc, 0, 0, 0, PCI_COMMAND, &val, 2);
        /* Clear error conditions */
        val = 0;
        ssb_extpci_write_config(pc, 0, 0, 0, PCI_STATUS, &val, 2);

        /* Enable PCI interrupts */
        pcicore_write32(pc, SSB_PCICORE_IMASK,
                        SSB_PCICORE_IMASK_INTA);

        /* Ok, ready to run, register it to the system.
         * The following needs change, if we want to port hostmode
         * to non-MIPS platform. */
        ssb_pcicore_controller.io_map_base = (unsigned long)ioremap_nocache(SSB_PCI_MEM, 0x04000000);
        set_io_port_base(ssb_pcicore_controller.io_map_base);
        /* Give some time to the PCI controller to configure itself with the new
         * values. Not waiting at this point causes crashes of the machine. */
        mdelay(10);
        register_pci_controller(&ssb_pcicore_controller);
}

static int pcicore_is_in_hostmode(struct ssb_pcicore *pc)
{
        struct ssb_bus *bus = pc->dev->bus;
        u16 chipid_top;
        u32 tmp;

        chipid_top = (bus->chip_id & 0xFF00);
        if (chipid_top != 0x4700 &&
            chipid_top != 0x5300)
                return 0;

        if (bus->sprom.boardflags_lo & SSB_PCICORE_BFL_NOPCI)
                return 0;

        /* The 200-pin BCM4712 package does not bond out PCI. Even when
         * PCI is bonded out, some boards may leave the pins floating. */
        if (bus->chip_id == 0x4712) {
                if (bus->chip_package == SSB_CHIPPACK_BCM4712S)
                        return 0;
                if (bus->chip_package == SSB_CHIPPACK_BCM4712M)
                        return 0;
        }
        if (bus->chip_id == 0x5350)
                return 0;

        return !mips_busprobe32(tmp, (bus->mmio + (pc->dev->core_index * SSB_CORE_SIZE)));
}
#endif /* CONFIG_SSB_PCICORE_HOSTMODE */

/**************************************************
 * Workarounds.
 **************************************************/

static void ssb_pcicore_fix_sprom_core_index(struct ssb_pcicore *pc)
{
        u16 tmp = pcicore_read16(pc, SSB_PCICORE_SPROM(0));
        if (((tmp & 0xF000) >> 12) != pc->dev->core_index) {
                tmp &= ~0xF000;
                tmp |= (pc->dev->core_index << 12);
                pcicore_write16(pc, SSB_PCICORE_SPROM(0), tmp);
        }
}

static u8 ssb_pcicore_polarity_workaround(struct ssb_pcicore *pc)
{
        return (ssb_pcie_read(pc, 0x204) & 0x10) ? 0xC0 : 0x80;
}

static void ssb_pcicore_serdes_workaround(struct ssb_pcicore *pc)
{
        const u8 serdes_pll_device = 0x1D;
        const u8 serdes_rx_device = 0x1F;
        u16 tmp;

        ssb_pcie_mdio_write(pc, serdes_rx_device, 1 /* Control */,
                            ssb_pcicore_polarity_workaround(pc));
        tmp = ssb_pcie_mdio_read(pc, serdes_pll_device, 1 /* Control */);
        if (tmp & 0x4000)
                ssb_pcie_mdio_write(pc, serdes_pll_device, 1, tmp & ~0x4000);
}

static void ssb_pcicore_pci_setup_workarounds(struct ssb_pcicore *pc)
{
        struct ssb_device *pdev = pc->dev;
        struct ssb_bus *bus = pdev->bus;
        u32 tmp;

        tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2);
        tmp |= SSB_PCICORE_SBTOPCI_PREF;
        tmp |= SSB_PCICORE_SBTOPCI_BURST;
        pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp);

        if (pdev->id.revision < 5) {
                tmp = ssb_read32(pdev, SSB_IMCFGLO);
                tmp &= ~SSB_IMCFGLO_SERTO;
                tmp |= 2;
                tmp &= ~SSB_IMCFGLO_REQTO;
                tmp |= 3 << SSB_IMCFGLO_REQTO_SHIFT;
                ssb_write32(pdev, SSB_IMCFGLO, tmp);
                ssb_commit_settings(bus);
        } else if (pdev->id.revision >= 11) {
                tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2);
                tmp |= SSB_PCICORE_SBTOPCI_MRM;
                pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp);
        }
}

static void ssb_pcicore_pcie_setup_workarounds(struct ssb_pcicore *pc)
{
        u32 tmp;
        u8 rev = pc->dev->id.revision;

        if (rev == 0 || rev == 1) {
                /* TLP Workaround register. */
                tmp = ssb_pcie_read(pc, 0x4);
                tmp |= 0x8;
                ssb_pcie_write(pc, 0x4, tmp);
        }
        if (rev == 1) {
                /* DLLP Link Control register. */
                tmp = ssb_pcie_read(pc, 0x100);
                tmp |= 0x40;
                ssb_pcie_write(pc, 0x100, tmp);
        }

        if (rev == 0) {
                const u8 serdes_rx_device = 0x1F;

                ssb_pcie_mdio_write(pc, serdes_rx_device,
                                        2 /* Timer */, 0x8128);
                ssb_pcie_mdio_write(pc, serdes_rx_device,
                                        6 /* CDR */, 0x0100);
                ssb_pcie_mdio_write(pc, serdes_rx_device,
                                        7 /* CDR BW */, 0x1466);
        } else if (rev == 3 || rev == 4 || rev == 5) {
                /* TODO: DLLP Power Management Threshold */
                ssb_pcicore_serdes_workaround(pc);
                /* TODO: ASPM */
        } else if (rev == 7) {
                /* TODO: No PLL down */
        }

        if (rev >= 6) {
                /* Miscellaneous Configuration Fixup */
                tmp = pcicore_read16(pc, SSB_PCICORE_SPROM(5));
                if (!(tmp & 0x8000))
                        pcicore_write16(pc, SSB_PCICORE_SPROM(5),
                                        tmp | 0x8000);
        }
}

/**************************************************
 * Generic and Clientmode operation code.
 **************************************************/

static void ssb_pcicore_init_clientmode(struct ssb_pcicore *pc)
{
        struct ssb_device *pdev = pc->dev;
        struct ssb_bus *bus = pdev->bus;

        if (bus->bustype == SSB_BUSTYPE_PCI)
                ssb_pcicore_fix_sprom_core_index(pc);

        /* Disable PCI interrupts. */
        ssb_write32(pdev, SSB_INTVEC, 0);

        /* Additional PCIe always once-executed workarounds */
        if (pc->dev->id.coreid == SSB_DEV_PCIE) {
                ssb_pcicore_serdes_workaround(pc);
                /* TODO: ASPM */
                /* TODO: Clock Request Update */
        }
}

void ssb_pcicore_init(struct ssb_pcicore *pc)
{
        struct ssb_device *dev = pc->dev;

        if (!dev)
                return;
        if (!ssb_device_is_enabled(dev))
                ssb_device_enable(dev, 0);

#ifdef CONFIG_SSB_PCICORE_HOSTMODE
        pc->hostmode = pcicore_is_in_hostmode(pc);
        if (pc->hostmode)
                ssb_pcicore_init_hostmode(pc);
#endif /* CONFIG_SSB_PCICORE_HOSTMODE */
        if (!pc->hostmode)
                ssb_pcicore_init_clientmode(pc);
}

static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address)
{
        pcicore_write32(pc, 0x130, address);
        return pcicore_read32(pc, 0x134);
}

static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data)
{
        pcicore_write32(pc, 0x130, address);
        pcicore_write32(pc, 0x134, data);
}

static void ssb_pcie_mdio_set_phy(struct ssb_pcicore *pc, u8 phy)
{
        const u16 mdio_control = 0x128;
        const u16 mdio_data = 0x12C;
        u32 v;
        int i;

        v = (1 << 30); /* Start of Transaction */
        v |= (1 << 28); /* Write Transaction */
        v |= (1 << 17); /* Turnaround */
        v |= (0x1F << 18);
        v |= (phy << 4);
        pcicore_write32(pc, mdio_data, v);

        udelay(10);
        for (i = 0; i < 200; i++) {
                v = pcicore_read32(pc, mdio_control);
                if (v & 0x100 /* Trans complete */)
                        break;
                msleep(1);
        }
}

static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address)
{
        const u16 mdio_control = 0x128;
        const u16 mdio_data = 0x12C;
        int max_retries = 10;
        u16 ret = 0;
        u32 v;
        int i;

        v = 0x80; /* Enable Preamble Sequence */
        v |= 0x2; /* MDIO Clock Divisor */
        pcicore_write32(pc, mdio_control, v);

        if (pc->dev->id.revision >= 10) {
                max_retries = 200;
                ssb_pcie_mdio_set_phy(pc, device);
        }

        v = (1 << 30); /* Start of Transaction */
        v |= (1 << 29); /* Read Transaction */
        v |= (1 << 17); /* Turnaround */
        if (pc->dev->id.revision < 10)
                v |= (u32)device << 22;
        v |= (u32)address << 18;
        pcicore_write32(pc, mdio_data, v);
        /* Wait for the device to complete the transaction */
        udelay(10);
        for (i = 0; i < max_retries; i++) {
                v = pcicore_read32(pc, mdio_control);
                if (v & 0x100 /* Trans complete */) {
                        udelay(10);
                        ret = pcicore_read32(pc, mdio_data);
                        break;
                }
                msleep(1);
        }
        pcicore_write32(pc, mdio_control, 0);
        return ret;
}

static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device,
                                u8 address, u16 data)
{
        const u16 mdio_control = 0x128;
        const u16 mdio_data = 0x12C;
        int max_retries = 10;
        u32 v;
        int i;

        v = 0x80; /* Enable Preamble Sequence */
        v |= 0x2; /* MDIO Clock Divisor */
        pcicore_write32(pc, mdio_control, v);

        if (pc->dev->id.revision >= 10) {
                max_retries = 200;
                ssb_pcie_mdio_set_phy(pc, device);
        }

        v = (1 << 30); /* Start of Transaction */
        v |= (1 << 28); /* Write Transaction */
        v |= (1 << 17); /* Turnaround */
        if (pc->dev->id.revision < 10)
                v |= (u32)device << 22;
        v |= (u32)address << 18;
        v |= data;
        pcicore_write32(pc, mdio_data, v);
        /* Wait for the device to complete the transaction */
        udelay(10);
        for (i = 0; i < max_retries; i++) {
                v = pcicore_read32(pc, mdio_control);
                if (v & 0x100 /* Trans complete */)
                        break;
                msleep(1);
        }
        pcicore_write32(pc, mdio_control, 0);
}

int ssb_pcicore_dev_irqvecs_enable(struct ssb_pcicore *pc,
                                   struct ssb_device *dev)
{
        struct ssb_device *pdev = pc->dev;
        struct ssb_bus *bus;
        int err = 0;
        u32 tmp;

        if (dev->bus->bustype != SSB_BUSTYPE_PCI) {
                /* This SSB device is not on a PCI host-bus. So the IRQs are
                 * not routed through the PCI core.
                 * So we must not enable routing through the PCI core. */
                goto out;
        }

        if (!pdev)
                goto out;
        bus = pdev->bus;

        might_sleep_if(pdev->id.coreid != SSB_DEV_PCI);

        /* Enable interrupts for this device. */
        if ((pdev->id.revision >= 6) || (pdev->id.coreid == SSB_DEV_PCIE)) {
                u32 coremask;

                /* Calculate the "coremask" for the device. */
                coremask = (1 << dev->core_index);

                WARN_ON(bus->bustype != SSB_BUSTYPE_PCI);
                err = pci_read_config_dword(bus->host_pci, SSB_PCI_IRQMASK, &tmp);
                if (err)
                        goto out;
                tmp |= coremask << 8;
                err = pci_write_config_dword(bus->host_pci, SSB_PCI_IRQMASK, tmp);
                if (err)
                        goto out;
        } else {
                u32 intvec;

                intvec = ssb_read32(pdev, SSB_INTVEC);
                tmp = ssb_read32(dev, SSB_TPSFLAG);
                tmp &= SSB_TPSFLAG_BPFLAG;
                intvec |= (1 << tmp);
                ssb_write32(pdev, SSB_INTVEC, intvec);
        }

        /* Setup PCIcore operation. */
        if (pc->setup_done)
                goto out;
        if (pdev->id.coreid == SSB_DEV_PCI) {
                ssb_pcicore_pci_setup_workarounds(pc);
        } else {
                WARN_ON(pdev->id.coreid != SSB_DEV_PCIE);
                ssb_pcicore_pcie_setup_workarounds(pc);
        }
        pc->setup_done = 1;
out:
        return err;
}
EXPORT_SYMBOL(ssb_pcicore_dev_irqvecs_enable);