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_new_inplace(IPackBus *bus, size_t bus_size,
  34                           DeviceState *parent,
  35                           const char *name, uint8_t n_slots,
  36                           qemu_irq_handler handler)
  37{
  38    qbus_create_inplace(bus, bus_size, TYPE_IPACK_BUS, parent, name);
  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, Error **errp)
  64{
  65    IPackDevice *idev = IPACK_DEVICE(dev);
  66    IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
  67    Error *err = NULL;
  68
  69    if (k->unrealize) {
  70        k->unrealize(dev, &err);
  71        error_propagate(errp, err);
  72        return;
  73    }
  74
  75    qemu_free_irqs(idev->irq, 2);
  76}
  77
  78static Property ipack_device_props[] = {
  79    DEFINE_PROP_INT32("slot", IPackDevice, slot, -1),
  80    DEFINE_PROP_END_OF_LIST()
  81};
  82
  83static void ipack_device_class_init(ObjectClass *klass, void *data)
  84{
  85    DeviceClass *k = DEVICE_CLASS(klass);
  86
  87    set_bit(DEVICE_CATEGORY_INPUT, k->categories);
  88    k->bus_type = TYPE_IPACK_BUS;
  89    k->realize = ipack_device_realize;
  90    k->unrealize = ipack_device_unrealize;
  91    k->props = ipack_device_props;
  92}
  93
  94const VMStateDescription vmstate_ipack_device = {
  95    .name = "ipack_device",
  96    .version_id = 1,
  97    .minimum_version_id = 1,
  98    .fields = (VMStateField[]) {
  99        VMSTATE_INT32(slot, IPackDevice),
 100        VMSTATE_END_OF_LIST()
 101    }
 102};
 103
 104static const TypeInfo ipack_device_info = {
 105    .name          = TYPE_IPACK_DEVICE,
 106    .parent        = TYPE_DEVICE,
 107    .instance_size = sizeof(IPackDevice),
 108    .class_size    = sizeof(IPackDeviceClass),
 109    .class_init    = ipack_device_class_init,
 110    .abstract      = true,
 111};
 112
 113static const TypeInfo ipack_bus_info = {
 114    .name = TYPE_IPACK_BUS,
 115    .parent = TYPE_BUS,
 116    .instance_size = sizeof(IPackBus),
 117};
 118
 119static void ipack_register_types(void)
 120{
 121    type_register_static(&ipack_device_info);
 122    type_register_static(&ipack_bus_info);
 123}
 124
 125type_init(ipack_register_types)
 126