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