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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.h"

#include "pci.h"

#include "pci_host.h"

#include "bswap.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 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;

};

struct PPCE500PCIState {

    PCIHostState pci_state;

    struct pci_outbound pob[PPCE500_PCI_NR_POBS];

    struct pci_inbound pib[PPCE500_PCI_NR_PIBS];

    uint32_t gasket_time;

    qemu_irq irq[4];

    /* mmio maps */

    int reg;

};

typedef struct PPCE500PCIState PPCE500PCIState;

static uint32_t pci_reg_read4(void *opaque, target_phys_addr_t addr)

{

    PPCE500PCIState *pci = opaque;

    unsigned long win;

    uint32_t value = 0;

    win = addr & 0xfe0;

    switch (win) {

    case PPCE500_PCI_OW1:

    case PPCE500_PCI_OW2:

    case PPCE500_PCI_OW3:

    case PPCE500_PCI_OW4:

        switch (addr & 0xC) {

        case PCI_POTAR: value = pci->pob[(addr >> 5) & 0x7].potar; break;

        case PCI_POTEAR: value = pci->pob[(addr >> 5) & 0x7].potear; break;

        case PCI_POWBAR: value = pci->pob[(addr >> 5) & 0x7].powbar; break;

        case PCI_POWAR: value = pci->pob[(addr >> 5) & 0x7].powar; break;

        default: break;

        }

        break;

    case PPCE500_PCI_IW3:

    case PPCE500_PCI_IW2:

    case PPCE500_PCI_IW1:

        switch (addr & 0xC) {

        case PCI_PITAR: value = pci->pib[(addr >> 5) & 0x3].pitar; break;

        case PCI_PIWBAR: value = pci->pib[(addr >> 5) & 0x3].piwbar; break;

        case PCI_PIWBEAR: value = pci->pib[(addr >> 5) & 0x3].piwbear; break;

        case PCI_PIWAR: value = pci->pib[(addr >> 5) & 0x3].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 CPUReadMemoryFunc * const e500_pci_reg_read[] = {

    &pci_reg_read4,

    &pci_reg_read4,

    &pci_reg_read4,

};

static void pci_reg_write4(void *opaque, target_phys_addr_t addr,

                               uint32_t value)

{

    PPCE500PCIState *pci = opaque;

    unsigned long win;

    win = addr & 0xfe0;

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

              __func__, value, win, addr);

    switch (win) {

    case PPCE500_PCI_OW1:

    case PPCE500_PCI_OW2:

    case PPCE500_PCI_OW3:

    case PPCE500_PCI_OW4:

        switch (addr & 0xC) {

        case PCI_POTAR: pci->pob[(addr >> 5) & 0x7].potar = value; break;

        case PCI_POTEAR: pci->pob[(addr >> 5) & 0x7].potear = value; break;

        case PCI_POWBAR: pci->pob[(addr >> 5) & 0x7].powbar = value; break;

        case PCI_POWAR: pci->pob[(addr >> 5) & 0x7].powar = value; break;

        default: break;

        };

        break;

    case PPCE500_PCI_IW3:

    case PPCE500_PCI_IW2:

    case PPCE500_PCI_IW1:

        switch (addr & 0xC) {

        case PCI_PITAR: pci->pib[(addr >> 5) & 0x3].pitar = value; break;

        case PCI_PIWBAR: pci->pib[(addr >> 5) & 0x3].piwbar = value; break;

        case PCI_PIWBEAR: pci->pib[(addr >> 5) & 0x3].piwbear = value; break;

        case PCI_PIWAR: pci->pib[(addr >> 5) & 0x3].piwar = value; break;

        default: break;

        };

        break;

    case PPCE500_PCI_GASKET_TIMR:

        pci->gasket_time = value;

        break;

    default:

        break;

    };

}

static CPUWriteMemoryFunc * const e500_pci_reg_write[] = {

    &pci_reg_write4,

    &pci_reg_write4,

    &pci_reg_write4,

};

static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)

{

    int devno = pci_dev->devfn >> 3, ret = 0;

    switch (devno) {

        /* Two PCI slot */

        case 0x11:

        case 0x12:

            ret = (irq_num + devno - 0x10) % 4;

            break;

        default:

            printf("Error:%s:unknown dev number\n", __func__);

    }

    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()

    }

};

static void e500_pci_map(SysBusDevice *dev, target_phys_addr_t base)

{

    PCIHostState *h = FROM_SYSBUS(PCIHostState, sysbus_from_qdev(dev));

    PPCE500PCIState *s = DO_UPCAST(PPCE500PCIState, pci_state, h);

    sysbus_add_memory(dev, base + PCIE500_CFGADDR, &h->conf_mem);

    sysbus_add_memory(dev, base + PCIE500_CFGDATA, &h->data_mem);

    cpu_register_physical_memory(base + PCIE500_REG_BASE, PCIE500_REG_SIZE,

                                 s->reg);

}

static void e500_pci_unmap(SysBusDevice *dev, target_phys_addr_t base)

{

    PCIHostState *h = FROM_SYSBUS(PCIHostState, sysbus_from_qdev(dev));

    sysbus_del_memory(dev, &h->conf_mem);

    sysbus_del_memory(dev, &h->data_mem);

    cpu_register_physical_memory(base + PCIE500_REG_BASE, PCIE500_REG_SIZE,

                                 IO_MEM_UNASSIGNED);

}

#include "exec-memory.h"

static int e500_pcihost_initfn(SysBusDevice *dev)

{

    PCIHostState *h;

    PPCE500PCIState *s;

    PCIBus *b;

    int i;

    MemoryRegion *address_space_mem = get_system_memory();

    MemoryRegion *address_space_io = get_system_io();

    h = FROM_SYSBUS(PCIHostState, sysbus_from_qdev(dev));

    s = DO_UPCAST(PPCE500PCIState, pci_state, h);

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

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

    }

    b = pci_register_bus(&s->pci_state.busdev.qdev, NULL, mpc85xx_pci_set_irq,

                         mpc85xx_pci_map_irq, s->irq, address_space_mem,

                         address_space_io, PCI_DEVFN(0x11, 0), 4);

    s->pci_state.bus = b;

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

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

                          "pci-conf-idx", 4);

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

                          "pci-conf-data", 4);

    s->reg = cpu_register_io_memory(e500_pci_reg_read, e500_pci_reg_write, s,

                                    DEVICE_BIG_ENDIAN);

    sysbus_init_mmio_cb2(dev, e500_pci_map, e500_pci_unmap);

    return 0;

}

static PCIDeviceInfo e500_host_bridge_info = {

    .qdev.name    = "e500-host-bridge",

    .qdev.desc    = "Host bridge",

    .qdev.size    = sizeof(PCIDevice),

    .vendor_id    = PCI_VENDOR_ID_FREESCALE,

    .device_id    = PCI_DEVICE_ID_MPC8533E,

    .class_id     = PCI_CLASS_PROCESSOR_POWERPC,

};

static SysBusDeviceInfo e500_pcihost_info = {

    .init         = e500_pcihost_initfn,

    .qdev.name    = "e500-pcihost",

    .qdev.size    = sizeof(PPCE500PCIState),

    .qdev.vmsd    = &vmstate_ppce500_pci,

};

static void e500_pci_register(void)

{

    sysbus_register_withprop(&e500_pcihost_info);

    pci_qdev_register(&e500_host_bridge_info);

}

device_init(e500_pci_register);