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