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/*

 * QEMU PowerPC E500 embedded processors pci controller emulation

 *

 * Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved.

 *

 * Author: Yu Liu,     <yu.liu@freescale.com>

 *

 * This file is derived from hw/ppc4xx_pci.c,

 * the copyright for that material belongs to the original owners.

 *

 * This is free software; you can redistribute it and/or modify

 * it under the terms of  the GNU General  Public License as published by

 * the Free Software Foundation;  either version 2 of the  License, or

 * (at your option) any later version.

 */

#include "hw/hw.h"

#include "hw/ppc/e500-ccsr.h"

#include "hw/pci/pci.h"

#include "hw/pci/pci_host.h"

#include "qemu/bswap.h"

#include "hw/pci-host/ppce500.h"

#ifdef DEBUG_PCI

#define pci_debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)

#else

#define pci_debug(fmt, ...)

#endif

#define PCIE500_CFGADDR       0x0

#define PCIE500_CFGDATA       0x4

#define PCIE500_REG_BASE      0xC00

#define PCIE500_ALL_SIZE      0x1000

#define PCIE500_REG_SIZE      (PCIE500_ALL_SIZE - PCIE500_REG_BASE)

#define PCIE500_PCI_IOLEN     0x10000ULL

#define PPCE500_PCI_CONFIG_ADDR         0x0

#define PPCE500_PCI_CONFIG_DATA         0x4

#define PPCE500_PCI_INTACK              0x8

#define PPCE500_PCI_OW1                 (0xC20 - PCIE500_REG_BASE)

#define PPCE500_PCI_OW2                 (0xC40 - PCIE500_REG_BASE)

#define PPCE500_PCI_OW3                 (0xC60 - PCIE500_REG_BASE)

#define PPCE500_PCI_OW4                 (0xC80 - PCIE500_REG_BASE)

#define PPCE500_PCI_IW3                 (0xDA0 - PCIE500_REG_BASE)

#define PPCE500_PCI_IW2                 (0xDC0 - PCIE500_REG_BASE)

#define PPCE500_PCI_IW1                 (0xDE0 - PCIE500_REG_BASE)

#define PPCE500_PCI_GASKET_TIMR         (0xE20 - PCIE500_REG_BASE)

#define PCI_POTAR               0x0

#define PCI_POTEAR              0x4

#define PCI_POWBAR              0x8

#define PCI_POWAR               0x10

#define PCI_PITAR               0x0

#define PCI_PIWBAR              0x8

#define PCI_PIWBEAR             0xC

#define PCI_PIWAR               0x10

#define PPCE500_PCI_NR_POBS     5

#define PPCE500_PCI_NR_PIBS     3

struct  pci_outbound {

    uint32_t potar;

    uint32_t potear;

    uint32_t powbar;

    uint32_t powar;

};

struct pci_inbound {

    uint32_t pitar;

    uint32_t piwbar;

    uint32_t piwbear;

    uint32_t piwar;

};

#define TYPE_PPC_E500_PCI_HOST_BRIDGE "e500-pcihost"

#define PPC_E500_PCI_HOST_BRIDGE(obj) \

    OBJECT_CHECK(PPCE500PCIState, (obj), TYPE_PPC_E500_PCI_HOST_BRIDGE)

struct PPCE500PCIState {

    PCIHostState parent_obj;

    struct pci_outbound pob[PPCE500_PCI_NR_POBS];

    struct pci_inbound pib[PPCE500_PCI_NR_PIBS];

    uint32_t gasket_time;

    qemu_irq irq[4];

    uint32_t first_slot;

    /* mmio maps */

    MemoryRegion container;

    MemoryRegion iomem;

    MemoryRegion pio;

};

#define TYPE_PPC_E500_PCI_BRIDGE "e500-host-bridge"

#define PPC_E500_PCI_BRIDGE(obj) \

    OBJECT_CHECK(PPCE500PCIBridgeState, (obj), TYPE_PPC_E500_PCI_BRIDGE)

struct PPCE500PCIBridgeState {

    /*< private >*/

    PCIDevice parent;

    /*< public >*/

    MemoryRegion bar0;

};

typedef struct PPCE500PCIBridgeState PPCE500PCIBridgeState;

typedef struct PPCE500PCIState PPCE500PCIState;

static uint64_t pci_reg_read4(void *opaque, hwaddr addr,

                              unsigned size)

{

    PPCE500PCIState *pci = opaque;

    unsigned long win;

    uint32_t value = 0;

    int idx;

    win = addr & 0xfe0;

    switch (win) {

    case PPCE500_PCI_OW1:

    case PPCE500_PCI_OW2:

    case PPCE500_PCI_OW3:

    case PPCE500_PCI_OW4:

        idx = (addr >> 5) & 0x7;

        switch (addr & 0xC) {

        case PCI_POTAR:

            value = pci->pob[idx].potar;

            break;

        case PCI_POTEAR:

            value = pci->pob[idx].potear;

            break;

        case PCI_POWBAR:

            value = pci->pob[idx].powbar;

            break;

        case PCI_POWAR:

            value = pci->pob[idx].powar;

            break;

        default:

            break;

        }

        break;

    case PPCE500_PCI_IW3:

    case PPCE500_PCI_IW2:

    case PPCE500_PCI_IW1:

        idx = ((addr >> 5) & 0x3) - 1;

        switch (addr & 0xC) {

        case PCI_PITAR:

            value = pci->pib[idx].pitar;

            break;

        case PCI_PIWBAR:

            value = pci->pib[idx].piwbar;

            break;

        case PCI_PIWBEAR:

            value = pci->pib[idx].piwbear;

            break;

        case PCI_PIWAR:

            value = pci->pib[idx].piwar;

            break;

        default:

            break;

        };

        break;

    case PPCE500_PCI_GASKET_TIMR:

        value = pci->gasket_time;

        break;

    default:

        break;

    }

    pci_debug("%s: win:%lx(addr:" TARGET_FMT_plx ") -> value:%x\n", __func__,

              win, addr, value);

    return value;

}

static void pci_reg_write4(void *opaque, hwaddr addr,

                           uint64_t value, unsigned size)

{

    PPCE500PCIState *pci = opaque;

    unsigned long win;

    int idx;

    win = addr & 0xfe0;

    pci_debug("%s: value:%x -> win:%lx(addr:" TARGET_FMT_plx ")\n",

              __func__, (unsigned)value, win, addr);

    switch (win) {

    case PPCE500_PCI_OW1:

    case PPCE500_PCI_OW2:

    case PPCE500_PCI_OW3:

    case PPCE500_PCI_OW4:

        idx = (addr >> 5) & 0x7;

        switch (addr & 0xC) {

        case PCI_POTAR:

            pci->pob[idx].potar = value;

            break;

        case PCI_POTEAR:

            pci->pob[idx].potear = value;

            break;

        case PCI_POWBAR:

            pci->pob[idx].powbar = value;

            break;

        case PCI_POWAR:

            pci->pob[idx].powar = value;

            break;

        default:

            break;

        };

        break;

    case PPCE500_PCI_IW3:

    case PPCE500_PCI_IW2:

    case PPCE500_PCI_IW1:

        idx = ((addr >> 5) & 0x3) - 1;

        switch (addr & 0xC) {

        case PCI_PITAR:

            pci->pib[idx].pitar = value;

            break;

        case PCI_PIWBAR:

            pci->pib[idx].piwbar = value;

            break;

        case PCI_PIWBEAR:

            pci->pib[idx].piwbear = value;

            break;

        case PCI_PIWAR:

            pci->pib[idx].piwar = value;

            break;

        default:

            break;

        };

        break;

    case PPCE500_PCI_GASKET_TIMR:

        pci->gasket_time = value;

        break;

    default:

        break;

    };

}

static const MemoryRegionOps e500_pci_reg_ops = {

    .read = pci_reg_read4,

    .write = pci_reg_write4,

    .endianness = DEVICE_BIG_ENDIAN,

};

static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)

{

    int devno = pci_dev->devfn >> 3;

    int ret;

    ret = ppce500_pci_map_irq_slot(devno, irq_num);

    pci_debug("%s: devfn %x irq %d -> %d  devno:%x\n", __func__,

           pci_dev->devfn, irq_num, ret, devno);

    return ret;

}

static void mpc85xx_pci_set_irq(void *opaque, int irq_num, int level)

{

    qemu_irq *pic = opaque;

    pci_debug("%s: PCI irq %d, level:%d\n", __func__, irq_num, level);

    qemu_set_irq(pic[irq_num], level);

}

static const VMStateDescription vmstate_pci_outbound = {

    .name = "pci_outbound",

    .version_id = 0,

    .minimum_version_id = 0,

    .minimum_version_id_old = 0,

    .fields      = (VMStateField[]) {

        VMSTATE_UINT32(potar, struct pci_outbound),

        VMSTATE_UINT32(potear, struct pci_outbound),

        VMSTATE_UINT32(powbar, struct pci_outbound),

        VMSTATE_UINT32(powar, struct pci_outbound),

        VMSTATE_END_OF_LIST()

    }

};

static const VMStateDescription vmstate_pci_inbound = {

    .name = "pci_inbound",

    .version_id = 0,

    .minimum_version_id = 0,

    .minimum_version_id_old = 0,

    .fields      = (VMStateField[]) {

        VMSTATE_UINT32(pitar, struct pci_inbound),

        VMSTATE_UINT32(piwbar, struct pci_inbound),

        VMSTATE_UINT32(piwbear, struct pci_inbound),

        VMSTATE_UINT32(piwar, struct pci_inbound),

        VMSTATE_END_OF_LIST()

    }

};

static const VMStateDescription vmstate_ppce500_pci = {

    .name = "ppce500_pci",

    .version_id = 1,

    .minimum_version_id = 1,

    .minimum_version_id_old = 1,

    .fields      = (VMStateField[]) {

        VMSTATE_STRUCT_ARRAY(pob, PPCE500PCIState, PPCE500_PCI_NR_POBS, 1,

                             vmstate_pci_outbound, struct pci_outbound),

        VMSTATE_STRUCT_ARRAY(pib, PPCE500PCIState, PPCE500_PCI_NR_PIBS, 1,

                             vmstate_pci_outbound, struct pci_inbound),

        VMSTATE_UINT32(gasket_time, PPCE500PCIState),

        VMSTATE_END_OF_LIST()

    }

};

#include "exec/address-spaces.h"

static int e500_pcihost_bridge_initfn(PCIDevice *d)

{

    PPCE500PCIBridgeState *b = PPC_E500_PCI_BRIDGE(d);

    PPCE500CCSRState *ccsr = CCSR(container_get(qdev_get_machine(),

                                  "/e500-ccsr"));

    pci_config_set_class(d->config, PCI_CLASS_BRIDGE_PCI);

    d->config[PCI_HEADER_TYPE] =

        (d->config[PCI_HEADER_TYPE] & PCI_HEADER_TYPE_MULTI_FUNCTION) |

        PCI_HEADER_TYPE_BRIDGE;

    memory_region_init_alias(&b->bar0, NULL, "e500-pci-bar0", &ccsr->ccsr_space,

                             0, int128_get64(ccsr->ccsr_space.size));

    pci_register_bar(d, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &b->bar0);

    return 0;

}

static int e500_pcihost_initfn(SysBusDevice *dev)

{

    PCIHostState *h;

    PPCE500PCIState *s;

    PCIBus *b;

    int i;

    MemoryRegion *address_space_mem = get_system_memory();

    h = PCI_HOST_BRIDGE(dev);

    s = PPC_E500_PCI_HOST_BRIDGE(dev);

    for (i = 0; i < ARRAY_SIZE(s->irq); i++) {

        sysbus_init_irq(dev, &s->irq[i]);

    }

    memory_region_init(&s->pio, NULL, "pci-pio", PCIE500_PCI_IOLEN);

    b = pci_register_bus(DEVICE(dev), NULL, mpc85xx_pci_set_irq,

                         mpc85xx_pci_map_irq, s->irq, address_space_mem,

                         &s->pio, PCI_DEVFN(s->first_slot, 0), 4, TYPE_PCI_BUS);

    h->bus = b;

    pci_create_simple(b, 0, "e500-host-bridge");

    memory_region_init(&s->container, NULL, "pci-container", PCIE500_ALL_SIZE);

    memory_region_init_io(&h->conf_mem, NULL, &pci_host_conf_be_ops, h,

                          "pci-conf-idx", 4);

    memory_region_init_io(&h->data_mem, NULL, &pci_host_data_le_ops, h,

                          "pci-conf-data", 4);

    memory_region_init_io(&s->iomem, NULL, &e500_pci_reg_ops, s,

                          "pci.reg", PCIE500_REG_SIZE);

    memory_region_add_subregion(&s->container, PCIE500_CFGADDR, &h->conf_mem);

    memory_region_add_subregion(&s->container, PCIE500_CFGDATA, &h->data_mem);

    memory_region_add_subregion(&s->container, PCIE500_REG_BASE, &s->iomem);

    sysbus_init_mmio(dev, &s->container);

    sysbus_init_mmio(dev, &s->pio);

    return 0;

}

static void e500_host_bridge_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

    k->init = e500_pcihost_bridge_initfn;

    k->vendor_id = PCI_VENDOR_ID_FREESCALE;

    k->device_id = PCI_DEVICE_ID_MPC8533E;

    k->class_id = PCI_CLASS_PROCESSOR_POWERPC;

    dc->desc = "Host bridge";

}

static const TypeInfo e500_host_bridge_info = {

    .name          = "e500-host-bridge",

    .parent        = TYPE_PCI_DEVICE,

    .instance_size = sizeof(PPCE500PCIBridgeState),

    .class_init    = e500_host_bridge_class_init,

};

static Property pcihost_properties[] = {

    DEFINE_PROP_UINT32("first_slot", PPCE500PCIState, first_slot, 0x11),

    DEFINE_PROP_END_OF_LIST(),

};

static void e500_pcihost_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = e500_pcihost_initfn;

    dc->props = pcihost_properties;

    dc->vmsd = &vmstate_ppce500_pci;

}

static const TypeInfo e500_pcihost_info = {

    .name          = TYPE_PPC_E500_PCI_HOST_BRIDGE,

    .parent        = TYPE_PCI_HOST_BRIDGE,

    .instance_size = sizeof(PPCE500PCIState),

    .class_init    = e500_pcihost_class_init,

};

static void e500_pci_register_types(void)

{

    type_register_static(&e500_pcihost_info);

    type_register_static(&e500_host_bridge_info);

}

type_init(e500_pci_register_types)