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 "hw/char/serial.h" 27 #include "hw/isa/isa.h" 28 29 typedef struct ISASerialState { 30 ISADevice dev; 31 uint32_t index; 32 uint32_t iobase; 33 uint32_t isairq; 34 SerialState state; 35 } ISASerialState; 36 37 static const int isa_serial_io[MAX_SERIAL_PORTS] = { 38 0x3f8, 0x2f8, 0x3e8, 0x2e8 39 }; 40 static const int isa_serial_irq[MAX_SERIAL_PORTS] = { 41 4, 3, 4, 3 42 }; 43 44 static int serial_isa_initfn(ISADevice *dev) 45 { 46 static int index; 47 ISASerialState *isa = DO_UPCAST(ISASerialState, dev, dev); 48 SerialState *s = &isa->state; 49 50 if (isa->index == -1) { 51 isa->index = index; 52 } 53 if (isa->index >= MAX_SERIAL_PORTS) { 54 return -1; 55 } 56 if (isa->iobase == -1) { 57 isa->iobase = isa_serial_io[isa->index]; 58 } 59 if (isa->isairq == -1) { 60 isa->isairq = isa_serial_irq[isa->index]; 61 } 62 index++; 63 64 s->baudbase = 115200; 65 isa_init_irq(dev, &s->irq, isa->isairq); 66 serial_init_core(s); 67 qdev_set_legacy_instance_id(&dev->qdev, isa->iobase, 3); 68 69 memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8); 70 isa_register_ioport(dev, &s->io, isa->iobase); 71 return 0; 72 } 73 74 static const VMStateDescription vmstate_isa_serial = { 75 .name = "serial", 76 .version_id = 3, 77 .minimum_version_id = 2, 78 .fields = (VMStateField[]) { 79 VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState), 80 VMSTATE_END_OF_LIST() 81 } 82 }; 83 84 static Property serial_isa_properties[] = { 85 DEFINE_PROP_UINT32("index", ISASerialState, index, -1), 86 DEFINE_PROP_HEX32("iobase", ISASerialState, iobase, -1), 87 DEFINE_PROP_UINT32("irq", ISASerialState, isairq, -1), 88 DEFINE_PROP_CHR("chardev", ISASerialState, state.chr), 89 DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0), 90 DEFINE_PROP_END_OF_LIST(), 91 }; 92 93 static void serial_isa_class_initfn(ObjectClass *klass, void *data) 94 { 95 DeviceClass *dc = DEVICE_CLASS(klass); 96 ISADeviceClass *ic = ISA_DEVICE_CLASS(klass); 97 ic->init = serial_isa_initfn; 98 dc->vmsd = &vmstate_isa_serial; 99 dc->props = serial_isa_properties; 100 } 101 102 static const TypeInfo serial_isa_info = { 103 .name = "isa-serial", 104 .parent = TYPE_ISA_DEVICE, 105 .instance_size = sizeof(ISASerialState), 106 .class_init = serial_isa_class_initfn, 107 }; 108 109 static void serial_register_types(void) 110 { 111 type_register_static(&serial_isa_info); 112 } 113 114 type_init(serial_register_types) 115 116 bool serial_isa_init(ISABus *bus, int index, CharDriverState *chr) 117 { 118 ISADevice *dev; 119 120 dev = isa_try_create(bus, "isa-serial"); 121 if (!dev) { 122 return false; 123 } 124 qdev_prop_set_uint32(&dev->qdev, "index", index); 125 qdev_prop_set_chr(&dev->qdev, "chardev", chr); 126 if (qdev_init(&dev->qdev) < 0) { 127 return false; 128 } 129 return true; 130 } 131