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#include "qemu/osdep.h"
27#include "qapi/error.h"
28#include "qemu/module.h"
29#include "sysemu/sysemu.h"
30#include "hw/char/serial.h"
31#include "hw/isa/isa.h"
32#include "hw/qdev-properties.h"
33#include "migration/vmstate.h"
34
35#define ISA_SERIAL(obj) OBJECT_CHECK(ISASerialState, (obj), TYPE_ISA_SERIAL)
36
37typedef struct ISASerialState {
38 ISADevice parent_obj;
39
40 uint32_t index;
41 uint32_t iobase;
42 uint32_t isairq;
43 SerialState state;
44} ISASerialState;
45
46static const int isa_serial_io[MAX_ISA_SERIAL_PORTS] = {
47 0x3f8, 0x2f8, 0x3e8, 0x2e8
48};
49static const int isa_serial_irq[MAX_ISA_SERIAL_PORTS] = {
50 4, 3, 4, 3
51};
52
53static void serial_isa_realizefn(DeviceState *dev, Error **errp)
54{
55 static int index;
56 ISADevice *isadev = ISA_DEVICE(dev);
57 ISASerialState *isa = ISA_SERIAL(dev);
58 SerialState *s = &isa->state;
59
60 if (isa->index == -1) {
61 isa->index = index;
62 }
63 if (isa->index >= MAX_ISA_SERIAL_PORTS) {
64 error_setg(errp, "Max. supported number of ISA serial ports is %d.",
65 MAX_ISA_SERIAL_PORTS);
66 return;
67 }
68 if (isa->iobase == -1) {
69 isa->iobase = isa_serial_io[isa->index];
70 }
71 if (isa->isairq == -1) {
72 isa->isairq = isa_serial_irq[isa->index];
73 }
74 index++;
75
76 s->baudbase = 115200;
77 isa_init_irq(isadev, &s->irq, isa->isairq);
78 serial_realize_core(s, errp);
79 qdev_set_legacy_instance_id(dev, isa->iobase, 3);
80
81 memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8);
82 isa_register_ioport(isadev, &s->io, isa->iobase);
83}
84
85static const VMStateDescription vmstate_isa_serial = {
86 .name = "serial",
87 .version_id = 3,
88 .minimum_version_id = 2,
89 .fields = (VMStateField[]) {
90 VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
91 VMSTATE_END_OF_LIST()
92 }
93};
94
95static Property serial_isa_properties[] = {
96 DEFINE_PROP_UINT32("index", ISASerialState, index, -1),
97 DEFINE_PROP_UINT32("iobase", ISASerialState, iobase, -1),
98 DEFINE_PROP_UINT32("irq", ISASerialState, isairq, -1),
99 DEFINE_PROP_CHR("chardev", ISASerialState, state.chr),
100 DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
101 DEFINE_PROP_END_OF_LIST(),
102};
103
104static void serial_isa_class_initfn(ObjectClass *klass, void *data)
105{
106 DeviceClass *dc = DEVICE_CLASS(klass);
107
108 dc->realize = serial_isa_realizefn;
109 dc->vmsd = &vmstate_isa_serial;
110 dc->props = serial_isa_properties;
111 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
112}
113
114static const TypeInfo serial_isa_info = {
115 .name = TYPE_ISA_SERIAL,
116 .parent = TYPE_ISA_DEVICE,
117 .instance_size = sizeof(ISASerialState),
118 .class_init = serial_isa_class_initfn,
119};
120
121static void serial_register_types(void)
122{
123 type_register_static(&serial_isa_info);
124}
125
126type_init(serial_register_types)
127
128static void serial_isa_init(ISABus *bus, int index, Chardev *chr)
129{
130 DeviceState *dev;
131 ISADevice *isadev;
132
133 isadev = isa_create(bus, TYPE_ISA_SERIAL);
134 dev = DEVICE(isadev);
135 qdev_prop_set_uint32(dev, "index", index);
136 qdev_prop_set_chr(dev, "chardev", chr);
137 qdev_init_nofail(dev);
138}
139
140void serial_hds_isa_init(ISABus *bus, int from, int to)
141{
142 int i;
143
144 assert(from >= 0);
145 assert(to <= MAX_ISA_SERIAL_PORTS);
146
147 for (i = from; i < to; ++i) {
148 if (serial_hd(i)) {
149 serial_isa_init(bus, i, serial_hd(i));
150 }
151 }
152}
153