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 #define ISA_SERIAL(obj) OBJECT_CHECK(ISASerialState, (obj), TYPE_ISA_SERIAL) 30 31 typedef struct ISASerialState { 32 ISADevice parent_obj; 33 34 uint32_t index; 35 uint32_t iobase; 36 uint32_t isairq; 37 SerialState state; 38 } ISASerialState; 39 40 static const int isa_serial_io[MAX_SERIAL_PORTS] = { 41 0x3f8, 0x2f8, 0x3e8, 0x2e8 42 }; 43 static const int isa_serial_irq[MAX_SERIAL_PORTS] = { 44 4, 3, 4, 3 45 }; 46 47 static void serial_isa_realizefn(DeviceState *dev, Error **errp) 48 { 49 static int index; 50 ISADevice *isadev = ISA_DEVICE(dev); 51 ISASerialState *isa = ISA_SERIAL(dev); 52 SerialState *s = &isa->state; 53 54 if (isa->index == -1) { 55 isa->index = index; 56 } 57 if (isa->index >= MAX_SERIAL_PORTS) { 58 error_setg(errp, "Max. supported number of ISA serial ports is %d.", 59 MAX_SERIAL_PORTS); 60 return; 61 } 62 if (isa->iobase == -1) { 63 isa->iobase = isa_serial_io[isa->index]; 64 } 65 if (isa->isairq == -1) { 66 isa->isairq = isa_serial_irq[isa->index]; 67 } 68 index++; 69 70 s->baudbase = 115200; 71 isa_init_irq(isadev, &s->irq, isa->isairq); 72 serial_realize_core(s, errp); 73 qdev_set_legacy_instance_id(dev, isa->iobase, 3); 74 75 memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8); 76 isa_register_ioport(isadev, &s->io, isa->iobase); 77 } 78 79 static const VMStateDescription vmstate_isa_serial = { 80 .name = "serial", 81 .version_id = 3, 82 .minimum_version_id = 2, 83 .fields = (VMStateField[]) { 84 VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState), 85 VMSTATE_END_OF_LIST() 86 } 87 }; 88 89 static Property serial_isa_properties[] = { 90 DEFINE_PROP_UINT32("index", ISASerialState, index, -1), 91 DEFINE_PROP_HEX32("iobase", ISASerialState, iobase, -1), 92 DEFINE_PROP_UINT32("irq", ISASerialState, isairq, -1), 93 DEFINE_PROP_CHR("chardev", ISASerialState, state.chr), 94 DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0), 95 DEFINE_PROP_END_OF_LIST(), 96 }; 97 98 static void serial_isa_class_initfn(ObjectClass *klass, void *data) 99 { 100 DeviceClass *dc = DEVICE_CLASS(klass); 101 102 dc->realize = serial_isa_realizefn; 103 dc->vmsd = &vmstate_isa_serial; 104 dc->props = serial_isa_properties; 105 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 106 } 107 108 static const TypeInfo serial_isa_info = { 109 .name = TYPE_ISA_SERIAL, 110 .parent = TYPE_ISA_DEVICE, 111 .instance_size = sizeof(ISASerialState), 112 .class_init = serial_isa_class_initfn, 113 }; 114 115 static void serial_register_types(void) 116 { 117 type_register_static(&serial_isa_info); 118 } 119 120 type_init(serial_register_types) 121 122 bool serial_isa_init(ISABus *bus, int index, CharDriverState *chr) 123 { 124 DeviceState *dev; 125 ISADevice *isadev; 126 127 isadev = isa_try_create(bus, TYPE_ISA_SERIAL); 128 if (!isadev) { 129 return false; 130 } 131 dev = DEVICE(isadev); 132 qdev_prop_set_uint32(dev, "index", index); 133 qdev_prop_set_chr(dev, "chardev", chr); 134 if (qdev_init(dev) < 0) { 135 return false; 136 } 137 return true; 138 } 139