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 "hw/qdev-properties.h" 32 #include "migration/vmstate.h" 33 34 #define ISA_SERIAL(obj) OBJECT_CHECK(ISASerialState, (obj), TYPE_ISA_SERIAL) 35 36 typedef struct ISASerialState { 37 ISADevice parent_obj; 38 39 uint32_t index; 40 uint32_t iobase; 41 uint32_t isairq; 42 SerialState state; 43 } ISASerialState; 44 45 static const int isa_serial_io[MAX_ISA_SERIAL_PORTS] = { 46 0x3f8, 0x2f8, 0x3e8, 0x2e8 47 }; 48 static const int isa_serial_irq[MAX_ISA_SERIAL_PORTS] = { 49 4, 3, 4, 3 50 }; 51 52 static void serial_isa_realizefn(DeviceState *dev, Error **errp) 53 { 54 static int index; 55 ISADevice *isadev = ISA_DEVICE(dev); 56 ISASerialState *isa = ISA_SERIAL(dev); 57 SerialState *s = &isa->state; 58 59 if (isa->index == -1) { 60 isa->index = index; 61 } 62 if (isa->index >= MAX_ISA_SERIAL_PORTS) { 63 error_setg(errp, "Max. supported number of ISA serial ports is %d.", 64 MAX_ISA_SERIAL_PORTS); 65 return; 66 } 67 if (isa->iobase == -1) { 68 isa->iobase = isa_serial_io[isa->index]; 69 } 70 if (isa->isairq == -1) { 71 isa->isairq = isa_serial_irq[isa->index]; 72 } 73 index++; 74 75 s->baudbase = 115200; 76 isa_init_irq(isadev, &s->irq, isa->isairq); 77 serial_realize_core(s, errp); 78 qdev_set_legacy_instance_id(dev, isa->iobase, 3); 79 80 memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8); 81 isa_register_ioport(isadev, &s->io, isa->iobase); 82 } 83 84 static const VMStateDescription vmstate_isa_serial = { 85 .name = "serial", 86 .version_id = 3, 87 .minimum_version_id = 2, 88 .fields = (VMStateField[]) { 89 VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState), 90 VMSTATE_END_OF_LIST() 91 } 92 }; 93 94 static Property serial_isa_properties[] = { 95 DEFINE_PROP_UINT32("index", ISASerialState, index, -1), 96 DEFINE_PROP_UINT32("iobase", ISASerialState, iobase, -1), 97 DEFINE_PROP_UINT32("irq", ISASerialState, isairq, -1), 98 DEFINE_PROP_CHR("chardev", ISASerialState, state.chr), 99 DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0), 100 DEFINE_PROP_END_OF_LIST(), 101 }; 102 103 static void serial_isa_class_initfn(ObjectClass *klass, void *data) 104 { 105 DeviceClass *dc = DEVICE_CLASS(klass); 106 107 dc->realize = serial_isa_realizefn; 108 dc->vmsd = &vmstate_isa_serial; 109 dc->props = serial_isa_properties; 110 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 111 } 112 113 static const TypeInfo serial_isa_info = { 114 .name = TYPE_ISA_SERIAL, 115 .parent = TYPE_ISA_DEVICE, 116 .instance_size = sizeof(ISASerialState), 117 .class_init = serial_isa_class_initfn, 118 }; 119 120 static void serial_register_types(void) 121 { 122 type_register_static(&serial_isa_info); 123 } 124 125 type_init(serial_register_types) 126 127 static void serial_isa_init(ISABus *bus, int index, Chardev *chr) 128 { 129 DeviceState *dev; 130 ISADevice *isadev; 131 132 isadev = isa_create(bus, TYPE_ISA_SERIAL); 133 dev = DEVICE(isadev); 134 qdev_prop_set_uint32(dev, "index", index); 135 qdev_prop_set_chr(dev, "chardev", chr); 136 qdev_init_nofail(dev); 137 } 138 139 void serial_hds_isa_init(ISABus *bus, int from, int to) 140 { 141 int i; 142 143 assert(from >= 0); 144 assert(to <= MAX_ISA_SERIAL_PORTS); 145 146 for (i = from; i < to; ++i) { 147 if (serial_hd(i)) { 148 serial_isa_init(bus, i, serial_hd(i)); 149 } 150 } 151 } 152