1 /*
2 * QEMU 16550A UART emulation
3 *
4 * Copyright (c) 2003-2004 Fabrice Bellard
5 * Copyright (c) 2008 Citrix Systems, Inc.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26 /* see docs/specs/pci-serial.rst */
27
28 #include "qemu/osdep.h"
29 #include "qapi/error.h"
30 #include "qemu/module.h"
31 #include "hw/char/serial.h"
32 #include "hw/irq.h"
33 #include "hw/pci/pci_device.h"
34 #include "hw/qdev-properties.h"
35 #include "migration/vmstate.h"
36 #include "qom/object.h"
37
38 struct PCISerialState {
39 PCIDevice dev;
40 SerialState state;
41 };
42
43 #define TYPE_PCI_SERIAL "pci-serial"
OBJECT_DECLARE_SIMPLE_TYPE(PCISerialState,PCI_SERIAL)44 OBJECT_DECLARE_SIMPLE_TYPE(PCISerialState, PCI_SERIAL)
45
46 static void serial_pci_realize(PCIDevice *dev, Error **errp)
47 {
48 PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
49 SerialState *s = &pci->state;
50
51 if (!qdev_realize(DEVICE(s), NULL, errp)) {
52 return;
53 }
54
55 pci->dev.config[PCI_CLASS_PROG] = 2; /* 16550 compatible */
56 pci->dev.config[PCI_INTERRUPT_PIN] = 1;
57 s->irq = pci_allocate_irq(&pci->dev);
58
59 memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, "serial", 8);
60 pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
61 }
62
serial_pci_exit(PCIDevice * dev)63 static void serial_pci_exit(PCIDevice *dev)
64 {
65 PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
66 SerialState *s = &pci->state;
67
68 qdev_unrealize(DEVICE(s));
69 qemu_free_irq(s->irq);
70 }
71
72 static const VMStateDescription vmstate_pci_serial = {
73 .name = "pci-serial",
74 .version_id = 1,
75 .minimum_version_id = 1,
76 .fields = (const VMStateField[]) {
77 VMSTATE_PCI_DEVICE(dev, PCISerialState),
78 VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState),
79 VMSTATE_END_OF_LIST()
80 }
81 };
82
serial_pci_class_initfn(ObjectClass * klass,const void * data)83 static void serial_pci_class_initfn(ObjectClass *klass, const void *data)
84 {
85 DeviceClass *dc = DEVICE_CLASS(klass);
86 PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
87 pc->realize = serial_pci_realize;
88 pc->exit = serial_pci_exit;
89 pc->vendor_id = PCI_VENDOR_ID_REDHAT;
90 pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL;
91 pc->revision = 1;
92 pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
93 dc->vmsd = &vmstate_pci_serial;
94 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
95 }
96
serial_pci_init(Object * o)97 static void serial_pci_init(Object *o)
98 {
99 PCISerialState *ps = PCI_SERIAL(o);
100
101 object_initialize_child(o, "serial", &ps->state, TYPE_SERIAL);
102
103 qdev_alias_all_properties(DEVICE(&ps->state), o);
104 }
105
106 static const TypeInfo serial_pci_info = {
107 .name = TYPE_PCI_SERIAL,
108 .parent = TYPE_PCI_DEVICE,
109 .instance_size = sizeof(PCISerialState),
110 .instance_init = serial_pci_init,
111 .class_init = serial_pci_class_initfn,
112 .interfaces = (const InterfaceInfo[]) {
113 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
114 { },
115 },
116 };
117
serial_pci_register_types(void)118 static void serial_pci_register_types(void)
119 {
120 type_register_static(&serial_pci_info);
121 }
122
123 type_init(serial_pci_register_types)
124