hw/char/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 "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, DeviceState *parent,
  28                            const char *name, uint8_t n_slots,
  29                            qemu_irq_handler handler)
  30 {
  31     qbus_create_inplace(&bus->qbus, TYPE_IPACK_BUS, parent, name);
  32     bus->n_slots = n_slots;
  33     bus->set_irq = handler;
  34 }
  35
  36 static int ipack_device_dev_init(DeviceState *qdev)
  37 {
  38     IPackBus *bus = IPACK_BUS(qdev_get_parent_bus(qdev));
  39     IPackDevice *dev = IPACK_DEVICE(qdev);
  40     IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
  41
  42     if (dev->slot < 0) {
  43         dev->slot = bus->free_slot;
  44     }
  45     if (dev->slot >= bus->n_slots) {
  46         return -1;
  47     }
  48     bus->free_slot = dev->slot + 1;
  49
  50     dev->irq = qemu_allocate_irqs(bus->set_irq, dev, 2);
  51
  52     return k->init(dev);
  53 }
  54
  55 static int ipack_device_dev_exit(DeviceState *qdev)
  56 {
  57     IPackDevice *dev = IPACK_DEVICE(qdev);
  58     IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
  59
  60     if (k->exit) {
  61         k->exit(dev);
  62     }
  63
  64     qemu_free_irqs(dev->irq);
  65
  66     return 0;
  67 }
  68
  69 static Property ipack_device_props[] = {
  70     DEFINE_PROP_INT32("slot", IPackDevice, slot, -1),
  71     DEFINE_PROP_END_OF_LIST()
  72 };
  73
  74 static void ipack_device_class_init(ObjectClass *klass, void *data)
  75 {
  76     DeviceClass *k = DEVICE_CLASS(klass);
  77     set_bit(DEVICE_CATEGORY_INPUT, k->categories);
  78     k->bus_type = TYPE_IPACK_BUS;
  79     k->init = ipack_device_dev_init;
  80     k->exit = ipack_device_dev_exit;
  81     k->props = ipack_device_props;
  82 }
  83
  84 const VMStateDescription vmstate_ipack_device = {
  85     .name = "ipack_device",
  86     .version_id = 1,
  87     .minimum_version_id = 1,
  88     .minimum_version_id_old = 1,
  89     .fields      = (VMStateField[]) {
  90         VMSTATE_INT32(slot, IPackDevice),
  91         VMSTATE_END_OF_LIST()
  92     }
  93 };
  94
  95 static const TypeInfo ipack_device_info = {
  96     .name          = TYPE_IPACK_DEVICE,
  97     .parent        = TYPE_DEVICE,
  98     .instance_size = sizeof(IPackDevice),
  99     .class_size    = sizeof(IPackDeviceClass),
 100     .class_init    = ipack_device_class_init,
 101     .abstract      = true,
 102 };
 103
 104 static const TypeInfo ipack_bus_info = {
 105     .name = TYPE_IPACK_BUS,
 106     .parent = TYPE_BUS,
 107     .instance_size = sizeof(IPackBus),
 108 };
 109
 110 static void ipack_register_types(void)
 111 {
 112     type_register_static(&ipack_device_info);
 113     type_register_static(&ipack_bus_info);
 114 }
 115
 116 type_init(ipack_register_types)