1/*
2 * QEMU 8253/8254 interval timer emulation
3 *
4 * Copyright (c) 2003-2004 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25#ifndef HW_I8254_H
26#define HW_I8254_H
27
28#include "hw/qdev-properties.h"
29#include "hw/isa/isa.h"
30
31#define PIT_FREQ 1193182
32
33typedef struct PITChannelInfo {
34 int gate;
35 int mode;
36 int initial_count;
37 int out;
38} PITChannelInfo;
39
40#define TYPE_PIT_COMMON "pit-common"
41#define PIT_COMMON(obj) \
42 OBJECT_CHECK(PITCommonState, (obj), TYPE_PIT_COMMON)
43#define PIT_COMMON_CLASS(klass) \
44 OBJECT_CLASS_CHECK(PITCommonClass, (klass), TYPE_PIT_COMMON)
45#define PIT_COMMON_GET_CLASS(obj) \
46 OBJECT_GET_CLASS(PITCommonClass, (obj), TYPE_PIT_COMMON)
47
48#define TYPE_I8254 "isa-pit"
49#define TYPE_KVM_I8254 "kvm-pit"
50
51static inline ISADevice *i8254_pit_init(ISABus *bus, int base, int isa_irq,
52 qemu_irq alt_irq)
53{
54 DeviceState *dev;
55 ISADevice *d;
56
57 d = isa_create(bus, TYPE_I8254);
58 dev = DEVICE(d);
59 qdev_prop_set_uint32(dev, "iobase", base);
60 qdev_init_nofail(dev);
61 qdev_connect_gpio_out(dev, 0,
62 isa_irq >= 0 ? isa_get_irq(d, isa_irq) : alt_irq);
63
64 return d;
65}
66
67static inline ISADevice *kvm_pit_init(ISABus *bus, int base)
68{
69 DeviceState *dev;
70 ISADevice *d;
71
72 d = isa_create(bus, TYPE_KVM_I8254);
73 dev = DEVICE(d);
74 qdev_prop_set_uint32(dev, "iobase", base);
75 qdev_init_nofail(dev);
76
77 return d;
78}
79
80void pit_set_gate(ISADevice *dev, int channel, int val);
81void pit_get_channel_info(ISADevice *dev, int channel, PITChannelInfo *info);
82
83#endif /* HW_I8254_H */
84