qemu/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 "hw/ipack/ipack.h"
  12
  13 IPackDevice *ipack_device_find(IPackBus *bus, int32_t slot)
  14 {
  15     BusChild *kid;
  16
  17     QTAILQ_FOREACH(kid, &BUS(bus)->children, sibling) {
  18         DeviceState *qdev = kid->child;
  19         IPackDevice *ip = IPACK_DEVICE(qdev);
  20         if (ip->slot == slot) {
  21             return ip;
  22         }
  23     }
  24     return NULL;
  25 }
  26
  27 void ipack_bus_new_inplace(IPackBus *bus, size_t bus_size,
  28                            DeviceState *parent,
  29                            const char *name, uint8_t n_slots,
  30                            qemu_irq_handler handler)
  31 {
  32     qbus_create_inplace(bus, bus_size, TYPE_IPACK_BUS, parent, name);
  33     bus->n_slots = n_slots;
  34     bus->set_irq = handler;
  35 }
  36
  37 static void ipack_device_realize(DeviceState *dev, Error **errp)
  38 {
  39     IPackDevice *idev = IPACK_DEVICE(dev);
  40     IPackBus *bus = IPACK_BUS(qdev_get_parent_bus(dev));
  41     IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
  42
  43     if (idev->slot < 0) {
  44         idev->slot = bus->free_slot;
  45     }
  46     if (idev->slot >= bus->n_slots) {
  47         error_setg(errp, "Only %" PRIu8 " slots available.", bus->n_slots);
  48         return;
  49     }
  50     bus->free_slot = idev->slot + 1;
  51
  52     idev->irq = qemu_allocate_irqs(bus->set_irq, idev, 2);
  53
  54     k->realize(dev, errp);
  55 }
  56
  57 static void ipack_device_unrealize(DeviceState *dev, Error **errp)
  58 {
  59     IPackDevice *idev = IPACK_DEVICE(dev);
  60     IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
  61     Error *err = NULL;
  62
  63     if (k->unrealize) {
  64         k->unrealize(dev, &err);
  65         error_propagate(errp, err);
  66         return;
  67     }
  68
  69     qemu_free_irqs(idev->irq, 2);
  70 }
  71
  72 static Property ipack_device_props[] = {
  73     DEFINE_PROP_INT32("slot", IPackDevice, slot, -1),
  74     DEFINE_PROP_END_OF_LIST()
  75 };
  76
  77 static void ipack_device_class_init(ObjectClass *klass, void *data)
  78 {
  79     DeviceClass *k = DEVICE_CLASS(klass);
  80
  81     set_bit(DEVICE_CATEGORY_INPUT, k->categories);
  82     k->bus_type = TYPE_IPACK_BUS;
  83     k->realize = ipack_device_realize;
  84     k->unrealize = ipack_device_unrealize;
  85     k->props = ipack_device_props;
  86 }
  87
  88 const VMStateDescription vmstate_ipack_device = {
  89     .name = "ipack_device",
  90     .version_id = 1,
  91     .minimum_version_id = 1,
  92     .fields = (VMStateField[]) {
  93         VMSTATE_INT32(slot, IPackDevice),
  94         VMSTATE_END_OF_LIST()
  95     }
  96 };
  97
  98 static const TypeInfo ipack_device_info = {
  99     .name          = TYPE_IPACK_DEVICE,
 100     .parent        = TYPE_DEVICE,
 101     .instance_size = sizeof(IPackDevice),
 102     .class_size    = sizeof(IPackDeviceClass),
 103     .class_init    = ipack_device_class_init,
 104     .abstract      = true,
 105 };
 106
 107 static const TypeInfo ipack_bus_info = {
 108     .name = TYPE_IPACK_BUS,
 109     .parent = TYPE_BUS,
 110     .instance_size = sizeof(IPackBus),
 111 };
 112
 113 static void ipack_register_types(void)
 114 {
 115     type_register_static(&ipack_device_info);
 116     type_register_static(&ipack_bus_info);
 117 }
 118
 119 type_init(ipack_register_types)