xref: /qemu/hw/ipack/ipack.c (revision abff1abf) 
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)
64 {
65     IPackDevice *idev = IPACK_DEVICE(dev);
66     IPackDeviceClass *k = IPACK_DEVICE_GET_CLASS(dev);
67 
68     if (k->unrealize) {
69         k->unrealize(dev);
70         return;
71     }
72 
73     qemu_free_irqs(idev->irq, 2);
74 }
75 
76 static Property ipack_device_props[] = {
77     DEFINE_PROP_INT32("slot", IPackDevice, slot, -1),
78     DEFINE_PROP_END_OF_LIST()
79 };
80 
81 static void ipack_device_class_init(ObjectClass *klass, void *data)
82 {
83     DeviceClass *k = DEVICE_CLASS(klass);
84 
85     set_bit(DEVICE_CATEGORY_INPUT, k->categories);
86     k->bus_type = TYPE_IPACK_BUS;
87     k->realize = ipack_device_realize;
88     k->unrealize = ipack_device_unrealize;
89     device_class_set_props(k, ipack_device_props);
90 }
91 
92 const VMStateDescription vmstate_ipack_device = {
93     .name = "ipack_device",
94     .version_id = 1,
95     .minimum_version_id = 1,
96     .fields = (VMStateField[]) {
97         VMSTATE_INT32(slot, IPackDevice),
98         VMSTATE_END_OF_LIST()
99     }
100 };
101 
102 static const TypeInfo ipack_device_info = {
103     .name          = TYPE_IPACK_DEVICE,
104     .parent        = TYPE_DEVICE,
105     .instance_size = sizeof(IPackDevice),
106     .class_size    = sizeof(IPackDeviceClass),
107     .class_init    = ipack_device_class_init,
108     .abstract      = true,
109 };
110 
111 static const TypeInfo ipack_bus_info = {
112     .name = TYPE_IPACK_BUS,
113     .parent = TYPE_BUS,
114     .instance_size = sizeof(IPackBus),
115 };
116 
117 static void ipack_register_types(void)
118 {
119     type_register_static(&ipack_device_info);
120     type_register_static(&ipack_bus_info);
121 }
122 
123 type_init(ipack_register_types)
124