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5edb1b3f PM |
1 | /* |
2 | * IRQ splitter device. | |
3 | * | |
4 | * Copyright (c) 2018 Linaro Limited. | |
5 | * Written by Peter Maydell | |
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 "hw/core/split-irq.h" | |
64552b6b | 28 | #include "hw/irq.h" |
a27bd6c7 | 29 | #include "hw/qdev-properties.h" |
5edb1b3f | 30 | #include "qapi/error.h" |
0b8fa32f | 31 | #include "qemu/module.h" |
5edb1b3f PM |
32 | |
33 | static void split_irq_handler(void *opaque, int n, int level) | |
34 | { | |
35 | SplitIRQ *s = SPLIT_IRQ(opaque); | |
36 | int i; | |
37 | ||
38 | for (i = 0; i < s->num_lines; i++) { | |
39 | qemu_set_irq(s->out_irq[i], level); | |
40 | } | |
41 | } | |
42 | ||
43 | static void split_irq_init(Object *obj) | |
44 | { | |
45 | qdev_init_gpio_in(DEVICE(obj), split_irq_handler, 1); | |
46 | } | |
47 | ||
48 | static void split_irq_realize(DeviceState *dev, Error **errp) | |
49 | { | |
50 | SplitIRQ *s = SPLIT_IRQ(dev); | |
51 | ||
52 | if (s->num_lines < 1 || s->num_lines >= MAX_SPLIT_LINES) { | |
53 | error_setg(errp, | |
54 | "IRQ splitter number of lines %d is not between 1 and %d", | |
55 | s->num_lines, MAX_SPLIT_LINES); | |
56 | return; | |
57 | } | |
58 | ||
59 | qdev_init_gpio_out(dev, s->out_irq, s->num_lines); | |
60 | } | |
61 | ||
62 | static Property split_irq_properties[] = { | |
63 | DEFINE_PROP_UINT16("num-lines", SplitIRQ, num_lines, 1), | |
64 | DEFINE_PROP_END_OF_LIST(), | |
65 | }; | |
66 | ||
67 | static void split_irq_class_init(ObjectClass *klass, void *data) | |
68 | { | |
69 | DeviceClass *dc = DEVICE_CLASS(klass); | |
70 | ||
71 | /* No state to reset or migrate */ | |
4f67d30b | 72 | device_class_set_props(dc, split_irq_properties); |
5edb1b3f PM |
73 | dc->realize = split_irq_realize; |
74 | ||
75 | /* Reason: Needs to be wired up to work */ | |
76 | dc->user_creatable = false; | |
77 | } | |
78 | ||
79 | static const TypeInfo split_irq_type_info = { | |
80 | .name = TYPE_SPLIT_IRQ, | |
81 | .parent = TYPE_DEVICE, | |
82 | .instance_size = sizeof(SplitIRQ), | |
83 | .instance_init = split_irq_init, | |
84 | .class_init = split_irq_class_init, | |
85 | }; | |
86 | ||
87 | static void split_irq_register_types(void) | |
88 | { | |
89 | type_register_static(&split_irq_type_info); | |
90 | } | |
91 | ||
92 | type_init(split_irq_register_types) |