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/*
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 * ide bus support for qdev.
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 *
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 * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
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 */
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#include <hw/hw.h>
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#include "dma.h"
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#include "qemu-error.h"
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#include <hw/ide/internal.h>
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#include "blockdev.h"
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#include "sysemu.h"
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/* --------------------------------- */
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static char *idebus_get_fw_dev_path(DeviceState *dev);
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static struct BusInfo ide_bus_info = {
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    .name  = "IDE",
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    .size  = sizeof(IDEBus),
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    .get_fw_dev_path = idebus_get_fw_dev_path,
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    .props = (Property[]) {
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        DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
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        DEFINE_PROP_END_OF_LIST(),
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    },
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};
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void ide_bus_new(IDEBus *idebus, DeviceState *dev, int bus_id)
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{
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    qbus_create_inplace(&idebus->qbus, &ide_bus_info, dev, NULL);
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    idebus->bus_id = bus_id;
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}
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static char *idebus_get_fw_dev_path(DeviceState *dev)
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{
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    char path[30];
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    snprintf(path, sizeof(path), "%s@%d", qdev_fw_name(dev),
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             ((IDEBus*)dev->parent_bus)->bus_id);
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    return strdup(path);
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}
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static int ide_qdev_init(DeviceState *qdev, DeviceInfo *base)
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{
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    IDEDevice *dev = DO_UPCAST(IDEDevice, qdev, qdev);
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    IDEDeviceInfo *info = DO_UPCAST(IDEDeviceInfo, qdev, base);
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    IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
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    if (!dev->conf.bs) {
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        error_report("No drive specified");
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        goto err;
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    }
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    if (dev->unit == -1) {
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        dev->unit = bus->master ? 1 : 0;
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    }
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    switch (dev->unit) {
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    case 0:
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        if (bus->master) {
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            error_report("IDE unit %d is in use", dev->unit);
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            goto err;
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        }
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        bus->master = dev;
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        break;
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    case 1:
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        if (bus->slave) {
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            error_report("IDE unit %d is in use", dev->unit);
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            goto err;
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        }
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        bus->slave = dev;
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        break;
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    default:
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        error_report("Invalid IDE unit %d", dev->unit);
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        goto err;
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    }
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    return info->init(dev);
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err:
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    return -1;
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}
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static void ide_qdev_register(IDEDeviceInfo *info)
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{
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    info->qdev.init = ide_qdev_init;
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    info->qdev.bus_info = &ide_bus_info;
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    qdev_register(&info->qdev);
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}
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IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
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{
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    DeviceState *dev;
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    dev = qdev_create(&bus->qbus, drive->media_cd ? "ide-cd" : "ide-hd");
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    qdev_prop_set_uint32(dev, "unit", unit);
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    qdev_prop_set_drive_nofail(dev, "drive", drive->bdrv);
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    qdev_init_nofail(dev);
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    return DO_UPCAST(IDEDevice, qdev, dev);
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}
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void ide_get_bs(BlockDriverState *bs[], BusState *qbus)
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{
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    IDEBus *bus = DO_UPCAST(IDEBus, qbus, qbus);
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    bs[0] = bus->master ? bus->master->conf.bs : NULL;
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    bs[1] = bus->slave  ? bus->slave->conf.bs  : NULL;
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}
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/* --------------------------------- */
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typedef struct IDEDrive {
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    IDEDevice dev;
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} IDEDrive;
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static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)
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{
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    IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
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    IDEState *s = bus->ifs + dev->unit;
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    const char *serial;
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    DriveInfo *dinfo;
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    if (dev->conf.discard_granularity && dev->conf.discard_granularity != 512) {
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        error_report("discard_granularity must be 512 for ide");
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        return -1;
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    }
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    serial = dev->serial;
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    if (!serial) {
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        /* try to fall back to value set with legacy -drive serial=... */
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        dinfo = drive_get_by_blockdev(dev->conf.bs);
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        if (*dinfo->serial) {
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            serial = dinfo->serial;
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        }
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    }
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    if (ide_init_drive(s, dev->conf.bs, kind, dev->version, serial) < 0) {
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        return -1;
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    }
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    if (!dev->version) {
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        dev->version = qemu_strdup(s->version);
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    }
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    if (!dev->serial) {
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        dev->serial = qemu_strdup(s->drive_serial_str);
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    }
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    add_boot_device_path(dev->conf.bootindex, &dev->qdev,
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                         dev->unit ? "/disk@1" : "/disk@0");
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    return 0;
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}
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static int ide_hd_initfn(IDEDevice *dev)
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{
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    return ide_dev_initfn(dev, IDE_HD);
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}
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static int ide_cd_initfn(IDEDevice *dev)
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{
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    return ide_dev_initfn(dev, IDE_CD);
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}
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static int ide_drive_initfn(IDEDevice *dev)
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{
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    DriveInfo *dinfo = drive_get_by_blockdev(dev->conf.bs);
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    return ide_dev_initfn(dev, dinfo->media_cd ? IDE_CD : IDE_HD);
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}
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#define DEFINE_IDE_DEV_PROPERTIES()                     \
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    DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),        \
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    DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),  \
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    DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial)
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static IDEDeviceInfo ide_dev_info[] = {
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    {
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        .qdev.name    = "ide-hd",
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        .qdev.fw_name = "drive",
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        .qdev.desc    = "virtual IDE disk",
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        .qdev.size    = sizeof(IDEDrive),
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        .init         = ide_hd_initfn,
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        .qdev.props   = (Property[]) {
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            DEFINE_IDE_DEV_PROPERTIES(),
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            DEFINE_PROP_END_OF_LIST(),
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        }
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    },{
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        .qdev.name    = "ide-cd",
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        .qdev.fw_name = "drive",
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        .qdev.desc    = "virtual IDE CD-ROM",
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        .qdev.size    = sizeof(IDEDrive),
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        .init         = ide_cd_initfn,
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        .qdev.props   = (Property[]) {
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            DEFINE_IDE_DEV_PROPERTIES(),
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            DEFINE_PROP_END_OF_LIST(),
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        }
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    },{
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        .qdev.name    = "ide-drive", /* legacy -device ide-drive */
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        .qdev.fw_name = "drive",
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        .qdev.desc    = "virtual IDE disk or CD-ROM (legacy)",
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        .qdev.size    = sizeof(IDEDrive),
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        .init         = ide_drive_initfn,
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        .qdev.props   = (Property[]) {
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            DEFINE_IDE_DEV_PROPERTIES(),
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            DEFINE_PROP_END_OF_LIST(),
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        }
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    }
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};
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static void ide_dev_register(void)
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{
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    int i;
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    for (i = 0; i < ARRAY_SIZE(ide_dev_info); i++) {
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        ide_qdev_register(&ide_dev_info[i]);
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    }
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}
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device_init(ide_dev_register);