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 "qemu/osdep.h" 27 #include "qapi/error.h" 28 #include "qemu/module.h" 29 #include "hw/char/serial.h" 30 #include "hw/isa/isa.h" 31 #include "migration/vmstate.h" 32 33 #define ISA_SERIAL(obj) OBJECT_CHECK(ISASerialState, (obj), TYPE_ISA_SERIAL) 34 35 typedef struct ISASerialState { 36 ISADevice parent_obj; 37 38 uint32_t index; 39 uint32_t iobase; 40 uint32_t isairq; 41 SerialState state; 42 } ISASerialState; 43 44 static const int isa_serial_io[MAX_ISA_SERIAL_PORTS] = { 45 0x3f8, 0x2f8, 0x3e8, 0x2e8 46 }; 47 static const int isa_serial_irq[MAX_ISA_SERIAL_PORTS] = { 48 4, 3, 4, 3 49 }; 50 51 static void serial_isa_realizefn(DeviceState *dev, Error **errp) 52 { 53 static int index; 54 ISADevice *isadev = ISA_DEVICE(dev); 55 ISASerialState *isa = ISA_SERIAL(dev); 56 SerialState *s = &isa->state; 57 58 if (isa->index == -1) { 59 isa->index = index; 60 } 61 if (isa->index >= MAX_ISA_SERIAL_PORTS) { 62 error_setg(errp, "Max. supported number of ISA serial ports is %d.", 63 MAX_ISA_SERIAL_PORTS); 64 return; 65 } 66 if (isa->iobase == -1) { 67 isa->iobase = isa_serial_io[isa->index]; 68 } 69 if (isa->isairq == -1) { 70 isa->isairq = isa_serial_irq[isa->index]; 71 } 72 index++; 73 74 s->baudbase = 115200; 75 isa_init_irq(isadev, &s->irq, isa->isairq); 76 serial_realize_core(s, errp); 77 qdev_set_legacy_instance_id(dev, isa->iobase, 3); 78 79 memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8); 80 isa_register_ioport(isadev, &s->io, isa->iobase); 81 } 82 83 static const VMStateDescription vmstate_isa_serial = { 84 .name = "serial", 85 .version_id = 3, 86 .minimum_version_id = 2, 87 .fields = (VMStateField[]) { 88 VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState), 89 VMSTATE_END_OF_LIST() 90 } 91 }; 92 93 static Property serial_isa_properties[] = { 94 DEFINE_PROP_UINT32("index", ISASerialState, index, -1), 95 DEFINE_PROP_UINT32("iobase", ISASerialState, iobase, -1), 96 DEFINE_PROP_UINT32("irq", ISASerialState, isairq, -1), 97 DEFINE_PROP_CHR("chardev", ISASerialState, state.chr), 98 DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0), 99 DEFINE_PROP_END_OF_LIST(), 100 }; 101 102 static void serial_isa_class_initfn(ObjectClass *klass, void *data) 103 { 104 DeviceClass *dc = DEVICE_CLASS(klass); 105 106 dc->realize = serial_isa_realizefn; 107 dc->vmsd = &vmstate_isa_serial; 108 dc->props = serial_isa_properties; 109 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 110 } 111 112 static const TypeInfo serial_isa_info = { 113 .name = TYPE_ISA_SERIAL, 114 .parent = TYPE_ISA_DEVICE, 115 .instance_size = sizeof(ISASerialState), 116 .class_init = serial_isa_class_initfn, 117 }; 118 119 static void serial_register_types(void) 120 { 121 type_register_static(&serial_isa_info); 122 } 123 124 type_init(serial_register_types) 125 126 static void serial_isa_init(ISABus *bus, int index, Chardev *chr) 127 { 128 DeviceState *dev; 129 ISADevice *isadev; 130 131 isadev = isa_create(bus, TYPE_ISA_SERIAL); 132 dev = DEVICE(isadev); 133 qdev_prop_set_uint32(dev, "index", index); 134 qdev_prop_set_chr(dev, "chardev", chr); 135 qdev_init_nofail(dev); 136 } 137 138 void serial_hds_isa_init(ISABus *bus, int from, int to) 139 { 140 int i; 141 142 assert(from >= 0); 143 assert(to <= MAX_ISA_SERIAL_PORTS); 144 145 for (i = from; i < to; ++i) { 146 if (serial_hd(i)) { 147 serial_isa_init(bus, i, serial_hd(i)); 148 } 149 } 150 } 151