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/*

 * QEMU Grackle PCI host (heathrow OldWorld PowerMac)

 *

 * Copyright (c) 2006-2007 Fabrice Bellard

 * Copyright (c) 2007 Jocelyn Mayer

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#include "sysbus.h"

#include "ppc_mac.h"

#include "pci.h"

#include "pci_host.h"

/* debug Grackle */

//#define DEBUG_GRACKLE

#ifdef DEBUG_GRACKLE

#define GRACKLE_DPRINTF(fmt, ...)                               \

    do { printf("GRACKLE: " fmt , ## __VA_ARGS__); } while (0)

#else

#define GRACKLE_DPRINTF(fmt, ...)

#endif

typedef struct GrackleState {

    SysBusDevice busdev;

    PCIHostState host_state;

} GrackleState;

/* Don't know if this matches real hardware, but it agrees with OHW.  */

static int pci_grackle_map_irq(PCIDevice *pci_dev, int irq_num)

{

    return (irq_num + (pci_dev->devfn >> 3)) & 3;

}

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

{

    qemu_irq *pic = opaque;

    GRACKLE_DPRINTF("set_irq num %d level %d\n", irq_num, level);

    qemu_set_irq(pic[irq_num + 0x15], level);

}

static void pci_grackle_reset(void *opaque)

{

}

PCIBus *pci_grackle_init(uint32_t base, qemu_irq *pic)

{

    DeviceState *dev;

    SysBusDevice *s;

    GrackleState *d;

    dev = qdev_create(NULL, "grackle");

    qdev_init_nofail(dev);

    s = sysbus_from_qdev(dev);

    d = FROM_SYSBUS(GrackleState, s);

    d->host_state.bus = pci_register_bus(&d->busdev.qdev, "pci",

                                         pci_grackle_set_irq,

                                         pci_grackle_map_irq,

                                         pic, 0, 4);

    pci_create_simple(d->host_state.bus, 0, "grackle");

    sysbus_mmio_map(s, 0, base);

    sysbus_mmio_map(s, 1, base + 0x00200000);

    return d->host_state.bus;

}

static int pci_grackle_init_device(SysBusDevice *dev)

{

    GrackleState *s;

    int pci_mem_config, pci_mem_data;

    s = FROM_SYSBUS(GrackleState, dev);

    pci_mem_config = pci_host_conf_register_mmio(&s->host_state,

                                                 DEVICE_LITTLE_ENDIAN);

    pci_mem_data = pci_host_data_register_mmio(&s->host_state,

                                               DEVICE_LITTLE_ENDIAN);

    sysbus_init_mmio(dev, 0x1000, pci_mem_config);

    sysbus_init_mmio(dev, 0x1000, pci_mem_data);

    qemu_register_reset(pci_grackle_reset, &s->host_state);

    return 0;

}

static int grackle_pci_host_init(PCIDevice *d)

{

    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_MOTOROLA);

    pci_config_set_device_id(d->config, PCI_DEVICE_ID_MOTOROLA_MPC106);

    d->config[0x08] = 0x00; // revision

    d->config[0x09] = 0x01;

    pci_config_set_class(d->config, PCI_CLASS_BRIDGE_HOST);

    return 0;

}

static PCIDeviceInfo grackle_pci_host_info = {

    .qdev.name = "grackle",

    .qdev.size = sizeof(PCIDevice),

    .init      = grackle_pci_host_init,

};

static void grackle_register_devices(void)

{

    sysbus_register_dev("grackle", sizeof(GrackleState),

                        pci_grackle_init_device);

    pci_qdev_register(&grackle_pci_host_info);

}

device_init(grackle_register_devices)