LXR qemu/hw/ipack/ipack.c

   1/*
   2 * QEMU IndustryPack emulation
   3 *
   4 * Copyright (C) 2012 Igalia, S.L.
   5 * Author: Alberto Garcia <berto@igalia.com>
   6 *
   7 * This code is licensed under the GNU GPL v2 or (at your option) any
   8 * later version.
   9 */
  10
  11#include "qemu/osdep.h"
  12#include "qapi/error.h"
  13#include "qemu/module.h"
  14#include "hw/ipack/ipack.h"
  15#include "hw/irq.h"
  16#include "hw/qdev-properties.h"
  17#include "migration/vmstate.h"
  18
  19IPackDevice *ipack_device_find(IPackBus *bus, int32_t slot)
  20{
  21    BusChild *kid;
  22
  23    QTAILQ_FOREACH(kid, &BUS(bus)->children, sibling) {
  24        DeviceState *qdev = kid->child;
  25        IPackDevice *ip = IPACK_DEVICE(qdev);
  26        if (ip->slot == slot) {
  27            return ip;
  28        }
  29    }
  30    return NULL;
  31}
  32
  33void ipack_bus_init(IPackBus *bus, size_t bus_size,
  34                    DeviceState *parent,
  35                    uint8_t n_slots,
  36                    qemu_irq_handler handler)
  37{
  38    qbus_init(bus, bus_size, TYPE_IPACK_BUS, parent, NULL);
  39    bus->n_slots = n_slots;
  40    bus->set_irq = handler;
  41}
  42
  43static void ipack_device_realize(DeviceState *dev, Error **errp)
  44{
  45    IPackDevice *idev = IPACK_DEVICE(dev);
  46    IPackBus *bus = IPACK_BUS(qdev_get_parent_bus(dev));
  47    IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
  48
  49    if (idev->slot < 0) {
  50        idev->slot = bus->free_slot;
  51    }
  52    if (idev->slot >= bus->n_slots) {
  53        error_setg(errp, "Only %" PRIu8 " slots available.", bus->n_slots);
  54        return;
  55    }
  56    bus->free_slot = idev->slot + 1;
  57
  58    idev->irq = qemu_allocate_irqs(bus->set_irq, idev, 2);
  59
  60    k->realize(dev, errp);
  61}
  62
  63static void ipack_device_unrealize(DeviceState *dev)
  64{
  65    IPackDevice *idev = IPACK_DEVICE(dev);
  66    IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
  67
  68    if (k->unrealize) {
  69        k->unrealize(dev);
  70        return;
  71    }
  72
  73    qemu_free_irqs(idev->irq, 2);
  74}
  75
  76static Property ipack_device_props[] = {
  77    DEFINE_PROP_INT32("slot", IPackDevice, slot, -1),
  78    DEFINE_PROP_END_OF_LIST()
  79};
  80
  81static void ipack_device_class_init(ObjectClass *klass, void *data)
  82{
  83    DeviceClass *k = DEVICE_CLASS(klass);
  84
  85    set_bit(DEVICE_CATEGORY_INPUT, k->categories);
  86    k->bus_type = TYPE_IPACK_BUS;
  87    k->realize = ipack_device_realize;
  88    k->unrealize = ipack_device_unrealize;
  89    device_class_set_props(k, ipack_device_props);
  90}
  91
  92const VMStateDescription vmstate_ipack_device = {
  93    .name = "ipack_device",
  94    .version_id = 1,
  95    .minimum_version_id = 1,
  96    .fields = (VMStateField[]) {
  97        VMSTATE_INT32(slot, IPackDevice),
  98        VMSTATE_END_OF_LIST()
  99    }
 100};
 101
 102static const TypeInfo ipack_device_info = {
 103    .name          = TYPE_IPACK_DEVICE,
 104    .parent        = TYPE_DEVICE,
 105    .instance_size = sizeof(IPackDevice),
 106    .class_size    = sizeof(IPackDeviceClass),
 107    .class_init    = ipack_device_class_init,
 108    .abstract      = true,
 109};
 110
 111static const TypeInfo ipack_bus_info = {
 112    .name = TYPE_IPACK_BUS,
 113    .parent = TYPE_BUS,
 114    .instance_size = sizeof(IPackBus),
 115};
 116
 117static void ipack_register_types(void)
 118{
 119    type_register_static(&ipack_device_info);
 120    type_register_static(&ipack_bus_info);
 121}
 122
 123type_init(ipack_register_types)
 124