1 /* 2 * QEMU IRQ/GPIO common code. 3 * 4 * Copyright (c) 2016 Alistair Francis <alistair@alistair23.me>. 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 #include "qemu/osdep.h" 26 #include "hw/or-irq.h" 27 28 static void or_irq_handler(void *opaque, int n, int level) 29 { 30 qemu_or_irq *s = OR_IRQ(opaque); 31 int or_level = 0; 32 int i; 33 34 s->levels[n] = level; 35 36 for (i = 0; i < s->num_lines; i++) { 37 or_level |= s->levels[i]; 38 } 39 40 qemu_set_irq(s->out_irq, or_level); 41 } 42 43 static void or_irq_reset(DeviceState *dev) 44 { 45 qemu_or_irq *s = OR_IRQ(dev); 46 int i; 47 48 for (i = 0; i < MAX_OR_LINES; i++) { 49 s->levels[i] = false; 50 } 51 } 52 53 static void or_irq_realize(DeviceState *dev, Error **errp) 54 { 55 qemu_or_irq *s = OR_IRQ(dev); 56 57 assert(s->num_lines < MAX_OR_LINES); 58 59 qdev_init_gpio_in(dev, or_irq_handler, s->num_lines); 60 } 61 62 static void or_irq_init(Object *obj) 63 { 64 qemu_or_irq *s = OR_IRQ(obj); 65 66 qdev_init_gpio_out(DEVICE(obj), &s->out_irq, 1); 67 } 68 69 static const VMStateDescription vmstate_or_irq = { 70 .name = TYPE_OR_IRQ, 71 .version_id = 1, 72 .minimum_version_id = 1, 73 .fields = (VMStateField[]) { 74 VMSTATE_BOOL_ARRAY(levels, qemu_or_irq, MAX_OR_LINES), 75 VMSTATE_END_OF_LIST(), 76 } 77 }; 78 79 static Property or_irq_properties[] = { 80 DEFINE_PROP_UINT16("num-lines", qemu_or_irq, num_lines, 1), 81 DEFINE_PROP_END_OF_LIST(), 82 }; 83 84 static void or_irq_class_init(ObjectClass *klass, void *data) 85 { 86 DeviceClass *dc = DEVICE_CLASS(klass); 87 88 dc->reset = or_irq_reset; 89 dc->props = or_irq_properties; 90 dc->realize = or_irq_realize; 91 dc->vmsd = &vmstate_or_irq; 92 93 /* Reason: Needs to be wired up to work, e.g. see stm32f205_soc.c */ 94 dc->user_creatable = false; 95 } 96 97 static const TypeInfo or_irq_type_info = { 98 .name = TYPE_OR_IRQ, 99 .parent = TYPE_DEVICE, 100 .instance_size = sizeof(qemu_or_irq), 101 .instance_init = or_irq_init, 102 .class_init = or_irq_class_init, 103 }; 104 105 static void or_irq_register_types(void) 106 { 107 type_register_static(&or_irq_type_info); 108 } 109 110 type_init(or_irq_register_types) 111