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
  19 IPackDevice *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
  33 void 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
  43 static 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
  63 static 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
  76 static Property ipack_device_props[] = {
  77     DEFINE_PROP_INT32("slot", IPackDevice, slot, -1),
  78     DEFINE_PROP_END_OF_LIST()
  79 };
  80
  81 static 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
  92 const VMStateDescription vmstate_ipack_device = {
  93     .name = "ipack_device",
  94     .version_id = 1,
  95     .minimum_version_id = 1,
  96     .fields = (const VMStateField[]) {
  97         VMSTATE_INT32(slot, IPackDevice),
  98         VMSTATE_END_OF_LIST()
  99     }
 100 };
 101
 102 static 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
 111 static const TypeInfo ipack_bus_info = {
 112     .name = TYPE_IPACK_BUS,
 113     .parent = TYPE_BUS,
 114     .instance_size = sizeof(IPackBus),
 115 };
 116
 117 static void ipack_register_types(void)
 118 {
 119     type_register_static(&ipack_device_info);
 120     type_register_static(&ipack_bus_info);
 121 }
 122
 123 type_init(ipack_register_types)