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_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
  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, 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
  78 static Property ipack_device_props[] = {
  79     DEFINE_PROP_INT32("slot", IPackDevice, slot, -1),
  80     DEFINE_PROP_END_OF_LIST()
  81 };
  82
  83 static 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
  94 const 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
 104 static 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
 113 static const TypeInfo ipack_bus_info = {
 114     .name = TYPE_IPACK_BUS,
 115     .parent = TYPE_BUS,
 116     .instance_size = sizeof(IPackBus),
 117 };
 118
 119 static void ipack_register_types(void)
 120 {
 121     type_register_static(&ipack_device_info);
 122     type_register_static(&ipack_bus_info);
 123 }
 124
 125 type_init(ipack_register_types)