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
  16 IPackDevice *ipack_device_find(IPackBus *bus, int32_t slot)
  17 {
  18     BusChild *kid;
  19
  20     QTAILQ_FOREACH(kid, &BUS(bus)->children, sibling) {
  21         DeviceState *qdev = kid->child;
  22         IPackDevice *ip = IPACK_DEVICE(qdev);
  23         if (ip->slot == slot) {
  24             return ip;
  25         }
  26     }
  27     return NULL;
  28 }
  29
  30 void ipack_bus_new_inplace(IPackBus *bus, size_t bus_size,
  31                            DeviceState *parent,
  32                            const char *name, uint8_t n_slots,
  33                            qemu_irq_handler handler)
  34 {
  35     qbus_create_inplace(bus, bus_size, TYPE_IPACK_BUS, parent, name);
  36     bus->n_slots = n_slots;
  37     bus->set_irq = handler;
  38 }
  39
  40 static void ipack_device_realize(DeviceState *dev, Error **errp)
  41 {
  42     IPackDevice *idev = IPACK_DEVICE(dev);
  43     IPackBus *bus = IPACK_BUS(qdev_get_parent_bus(dev));
  44     IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
  45
  46     if (idev->slot < 0) {
  47         idev->slot = bus->free_slot;
  48     }
  49     if (idev->slot >= bus->n_slots) {
  50         error_setg(errp, "Only %" PRIu8 " slots available.", bus->n_slots);
  51         return;
  52     }
  53     bus->free_slot = idev->slot + 1;
  54
  55     idev->irq = qemu_allocate_irqs(bus->set_irq, idev, 2);
  56
  57     k->realize(dev, errp);
  58 }
  59
  60 static void ipack_device_unrealize(DeviceState *dev, Error **errp)
  61 {
  62     IPackDevice *idev = IPACK_DEVICE(dev);
  63     IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
  64     Error *err = NULL;
  65
  66     if (k->unrealize) {
  67         k->unrealize(dev, &err);
  68         error_propagate(errp, err);
  69         return;
  70     }
  71
  72     qemu_free_irqs(idev->irq, 2);
  73 }
  74
  75 static Property ipack_device_props[] = {
  76     DEFINE_PROP_INT32("slot", IPackDevice, slot, -1),
  77     DEFINE_PROP_END_OF_LIST()
  78 };
  79
  80 static void ipack_device_class_init(ObjectClass *klass, void *data)
  81 {
  82     DeviceClass *k = DEVICE_CLASS(klass);
  83
  84     set_bit(DEVICE_CATEGORY_INPUT, k->categories);
  85     k->bus_type = TYPE_IPACK_BUS;
  86     k->realize = ipack_device_realize;
  87     k->unrealize = ipack_device_unrealize;
  88     k->props = ipack_device_props;
  89 }
  90
  91 const VMStateDescription vmstate_ipack_device = {
  92     .name = "ipack_device",
  93     .version_id = 1,
  94     .minimum_version_id = 1,
  95     .fields = (VMStateField[]) {
  96         VMSTATE_INT32(slot, IPackDevice),
  97         VMSTATE_END_OF_LIST()
  98     }
  99 };
 100
 101 static const TypeInfo ipack_device_info = {
 102     .name          = TYPE_IPACK_DEVICE,
 103     .parent        = TYPE_DEVICE,
 104     .instance_size = sizeof(IPackDevice),
 105     .class_size    = sizeof(IPackDeviceClass),
 106     .class_init    = ipack_device_class_init,
 107     .abstract      = true,
 108 };
 109
 110 static const TypeInfo ipack_bus_info = {
 111     .name = TYPE_IPACK_BUS,
 112     .parent = TYPE_BUS,
 113     .instance_size = sizeof(IPackBus),
 114 };
 115
 116 static void ipack_register_types(void)
 117 {
 118     type_register_static(&ipack_device_info);
 119     type_register_static(&ipack_bus_info);
 120 }
 121
 122 type_init(ipack_register_types)