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/*

 * QEMU Uninorth PCI host (for all Mac99 and newer machines)

 *

 * Copyright (c) 2006 Fabrice Bellard

 *

 * 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 "hw.h"

#include "ppc_mac.h"

#include "pci.h"

#include "pci_host.h"

/* debug UniNorth */

//#define DEBUG_UNIN

#ifdef DEBUG_UNIN

#define UNIN_DPRINTF(fmt, ...)                                  \

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

#else

#define UNIN_DPRINTF(fmt, ...)

#endif

static const int unin_irq_line[] = { 0x1b, 0x1c, 0x1d, 0x1e };

typedef struct UNINState {

    SysBusDevice busdev;

    PCIHostState host_state;

    ReadWriteHandler data_handler;

} UNINState;

static int pci_unin_map_irq(PCIDevice *pci_dev, int irq_num)

{

    int retval;

    int devfn = pci_dev->devfn & 0x00FFFFFF;

    retval = (((devfn >> 11) & 0x1F) + irq_num) & 3;

    return retval;

}

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

{

    qemu_irq *pic = opaque;

    UNIN_DPRINTF("%s: setting INT %d = %d\n", __func__,

                 unin_irq_line[irq_num], level);

    qemu_set_irq(pic[unin_irq_line[irq_num]], level);

}

static void pci_unin_reset(void *opaque)

{

}

static uint32_t unin_get_config_reg(uint32_t reg, uint32_t addr)

{

    uint32_t retval;

    if (reg & (1u << 31)) {

        /* XXX OpenBIOS compatibility hack */

        retval = reg | (addr & 3);

    } else if (reg & 1) {

        /* CFA1 style */

        retval = (reg & ~7u) | (addr & 7);

    } else {

        uint32_t slot, func;

        /* Grab CFA0 style values */

        slot = ffs(reg & 0xfffff800) - 1;

        func = (reg >> 8) & 7;

        /* ... and then convert them to x86 format */

        /* config pointer */

        retval = (reg & (0xff - 7)) | (addr & 7);

        /* slot */

        retval |= slot << 11;

        /* fn */

        retval |= func << 8;

    }

    UNIN_DPRINTF("Converted config space accessor %08x/%08x -> %08x\n",

                 reg, addr, retval);

    return retval;

}

static void unin_data_write(ReadWriteHandler *handler,

                            pcibus_t addr, uint32_t val, int len)

{

    UNINState *s = container_of(handler, UNINState, data_handler);

    UNIN_DPRINTF("write addr %" FMT_PCIBUS " len %d val %x\n", addr, len, val);

    pci_data_write(s->host_state.bus,

                   unin_get_config_reg(s->host_state.config_reg, addr),

                   val, len);

}

static uint32_t unin_data_read(ReadWriteHandler *handler,

                               pcibus_t addr, int len)

{

    UNINState *s = container_of(handler, UNINState, data_handler);

    uint32_t val;

    val = pci_data_read(s->host_state.bus,

                        unin_get_config_reg(s->host_state.config_reg, addr),

                        len);

    UNIN_DPRINTF("read addr %" FMT_PCIBUS " len %d val %x\n", addr, len, val);

    return val;

}

static int pci_unin_main_init_device(SysBusDevice *dev)

{

    UNINState *s;

    int pci_mem_config, pci_mem_data;

    /* Use values found on a real PowerMac */

    /* Uninorth main bus */

    s = FROM_SYSBUS(UNINState, dev);

    pci_mem_config = pci_host_conf_register_mmio(&s->host_state,

                                                 DEVICE_LITTLE_ENDIAN);

    s->data_handler.read = unin_data_read;

    s->data_handler.write = unin_data_write;

    pci_mem_data = cpu_register_io_memory_simple(&s->data_handler,

                                                 DEVICE_LITTLE_ENDIAN);

    sysbus_init_mmio(dev, 0x1000, pci_mem_config);

    sysbus_init_mmio(dev, 0x1000, pci_mem_data);

    qemu_register_reset(pci_unin_reset, &s->host_state);

    return 0;

}

static int pci_u3_agp_init_device(SysBusDevice *dev)

{

    UNINState *s;

    int pci_mem_config, pci_mem_data;

    /* Uninorth U3 AGP bus */

    s = FROM_SYSBUS(UNINState, dev);

    pci_mem_config = pci_host_conf_register_mmio(&s->host_state,

                                                 DEVICE_LITTLE_ENDIAN);

    s->data_handler.read = unin_data_read;

    s->data_handler.write = unin_data_write;

    pci_mem_data = cpu_register_io_memory_simple(&s->data_handler,

                                                 DEVICE_LITTLE_ENDIAN);

    sysbus_init_mmio(dev, 0x1000, pci_mem_config);

    sysbus_init_mmio(dev, 0x1000, pci_mem_data);

    qemu_register_reset(pci_unin_reset, &s->host_state);

    return 0;

}

static int pci_unin_agp_init_device(SysBusDevice *dev)

{

    UNINState *s;

    int pci_mem_config, pci_mem_data;

    /* Uninorth AGP bus */

    s = FROM_SYSBUS(UNINState, 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);

    return 0;

}

static int pci_unin_internal_init_device(SysBusDevice *dev)

{

    UNINState *s;

    int pci_mem_config, pci_mem_data;

    /* Uninorth internal bus */

    s = FROM_SYSBUS(UNINState, 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);

    return 0;

}

PCIBus *pci_pmac_init(qemu_irq *pic)

{

    DeviceState *dev;

    SysBusDevice *s;

    UNINState *d;

    /* Use values found on a real PowerMac */

    /* Uninorth main bus */

    dev = qdev_create(NULL, "uni-north");

    qdev_init_nofail(dev);

    s = sysbus_from_qdev(dev);

    d = FROM_SYSBUS(UNINState, s);

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

                                         pci_unin_set_irq, pci_unin_map_irq,

                                         pic, PCI_DEVFN(11, 0), 4);

#if 0

    pci_create_simple(d->host_state.bus, PCI_DEVFN(11, 0), "uni-north");

#endif

    sysbus_mmio_map(s, 0, 0xf2800000);

    sysbus_mmio_map(s, 1, 0xf2c00000);

    /* DEC 21154 bridge */

#if 0

    /* XXX: not activated as PPC BIOS doesn't handle multiple buses properly */

    pci_create_simple(d->host_state.bus, PCI_DEVFN(12, 0), "dec-21154");

#endif

    /* Uninorth AGP bus */

    pci_create_simple(d->host_state.bus, PCI_DEVFN(11, 0), "uni-north-agp");

    dev = qdev_create(NULL, "uni-north-agp");

    qdev_init_nofail(dev);

    s = sysbus_from_qdev(dev);

    sysbus_mmio_map(s, 0, 0xf0800000);

    sysbus_mmio_map(s, 1, 0xf0c00000);

    /* Uninorth internal bus */

#if 0

    /* XXX: not needed for now */

    pci_create_simple(d->host_state.bus, PCI_DEVFN(14, 0), "uni-north-pci");

    dev = qdev_create(NULL, "uni-north-pci");

    qdev_init_nofail(dev);

    s = sysbus_from_qdev(dev);

    sysbus_mmio_map(s, 0, 0xf4800000);

    sysbus_mmio_map(s, 1, 0xf4c00000);

#endif

    return d->host_state.bus;

}

PCIBus *pci_pmac_u3_init(qemu_irq *pic)

{

    DeviceState *dev;

    SysBusDevice *s;

    UNINState *d;

    /* Uninorth AGP bus */

    dev = qdev_create(NULL, "u3-agp");

    qdev_init_nofail(dev);

    s = sysbus_from_qdev(dev);

    d = FROM_SYSBUS(UNINState, s);

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

                                         pci_unin_set_irq, pci_unin_map_irq,

                                         pic, PCI_DEVFN(11, 0), 4);

    sysbus_mmio_map(s, 0, 0xf0800000);

    sysbus_mmio_map(s, 1, 0xf0c00000);

    pci_create_simple(d->host_state.bus, 11 << 3, "u3-agp");

    return d->host_state.bus;

}

static int unin_main_pci_host_init(PCIDevice *d)

{

    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_APPLE);

    pci_config_set_device_id(d->config, PCI_DEVICE_ID_APPLE_UNI_N_PCI);

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

    pci_config_set_class(d->config, PCI_CLASS_BRIDGE_HOST);

    d->config[0x0C] = 0x08; // cache_line_size

    d->config[0x0D] = 0x10; // latency_timer

    d->config[0x34] = 0x00; // capabilities_pointer

    return 0;

}

static int unin_agp_pci_host_init(PCIDevice *d)

{

    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_APPLE);

    pci_config_set_device_id(d->config, PCI_DEVICE_ID_APPLE_UNI_N_AGP);

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

    pci_config_set_class(d->config, PCI_CLASS_BRIDGE_HOST);

    d->config[0x0C] = 0x08; // cache_line_size

    d->config[0x0D] = 0x10; // latency_timer

    //    d->config[0x34] = 0x80; // capabilities_pointer

    return 0;

}

static int u3_agp_pci_host_init(PCIDevice *d)

{

    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_APPLE);

    pci_config_set_device_id(d->config, PCI_DEVICE_ID_APPLE_U3_AGP);

    /* revision */

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

    pci_config_set_class(d->config, PCI_CLASS_BRIDGE_HOST);

    /* cache line size */

    d->config[0x0C] = 0x08;

    /* latency timer */

    d->config[0x0D] = 0x10;

    return 0;

}

static int unin_internal_pci_host_init(PCIDevice *d)

{

    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_APPLE);

    pci_config_set_device_id(d->config, PCI_DEVICE_ID_APPLE_UNI_N_I_PCI);

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

    pci_config_set_class(d->config, PCI_CLASS_BRIDGE_HOST);

    d->config[0x0C] = 0x08; // cache_line_size

    d->config[0x0D] = 0x10; // latency_timer

    d->config[0x34] = 0x00; // capabilities_pointer

    return 0;

}

static PCIDeviceInfo unin_main_pci_host_info = {

    .qdev.name = "uni-north",

    .qdev.size = sizeof(PCIDevice),

    .init      = unin_main_pci_host_init,

};

static PCIDeviceInfo u3_agp_pci_host_info = {

    .qdev.name = "u3-agp",

    .qdev.size = sizeof(PCIDevice),

    .init      = u3_agp_pci_host_init,

};

static PCIDeviceInfo unin_agp_pci_host_info = {

    .qdev.name = "uni-north-agp",

    .qdev.size = sizeof(PCIDevice),

    .init      = unin_agp_pci_host_init,

};

static PCIDeviceInfo unin_internal_pci_host_info = {

    .qdev.name = "uni-north-pci",

    .qdev.size = sizeof(PCIDevice),

    .init      = unin_internal_pci_host_init,

};

static void unin_register_devices(void)

{

    sysbus_register_dev("uni-north", sizeof(UNINState),

                        pci_unin_main_init_device);

    pci_qdev_register(&unin_main_pci_host_info);

    sysbus_register_dev("u3-agp", sizeof(UNINState),

                        pci_u3_agp_init_device);

    pci_qdev_register(&u3_agp_pci_host_info);

    sysbus_register_dev("uni-north-agp", sizeof(UNINState),

                        pci_unin_agp_init_device);

    pci_qdev_register(&unin_agp_pci_host_info);

    sysbus_register_dev("uni-north-pci", sizeof(UNINState),

                        pci_unin_internal_init_device);

    pci_qdev_register(&unin_internal_pci_host_info);

}

device_init(unin_register_devices)