hw/ipack/ipack.c

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