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 "sysemu/sysemu.h" 30 #include "hw/acpi/aml-build.h" 31 #include "hw/char/serial.h" 32 #include "hw/isa/isa.h" 33 #include "hw/qdev-properties.h" 34 #include "migration/vmstate.h" 35 36 #define ISA_SERIAL(obj) OBJECT_CHECK(ISASerialState, (obj), TYPE_ISA_SERIAL) 37 38 typedef struct ISASerialState { 39 ISADevice parent_obj; 40 41 uint32_t index; 42 uint32_t iobase; 43 uint32_t isairq; 44 SerialState state; 45 } ISASerialState; 46 47 static const int isa_serial_io[MAX_ISA_SERIAL_PORTS] = { 48 0x3f8, 0x2f8, 0x3e8, 0x2e8 49 }; 50 static const int isa_serial_irq[MAX_ISA_SERIAL_PORTS] = { 51 4, 3, 4, 3 52 }; 53 54 static void serial_isa_realizefn(DeviceState *dev, Error **errp) 55 { 56 static int index; 57 ISADevice *isadev = ISA_DEVICE(dev); 58 ISASerialState *isa = ISA_SERIAL(dev); 59 SerialState *s = &isa->state; 60 61 if (isa->index == -1) { 62 isa->index = index; 63 } 64 if (isa->index >= MAX_ISA_SERIAL_PORTS) { 65 error_setg(errp, "Max. supported number of ISA serial ports is %d.", 66 MAX_ISA_SERIAL_PORTS); 67 return; 68 } 69 if (isa->iobase == -1) { 70 isa->iobase = isa_serial_io[isa->index]; 71 } 72 if (isa->isairq == -1) { 73 isa->isairq = isa_serial_irq[isa->index]; 74 } 75 index++; 76 77 isa_init_irq(isadev, &s->irq, isa->isairq); 78 qdev_realize(DEVICE(s), NULL, errp); 79 qdev_set_legacy_instance_id(dev, isa->iobase, 3); 80 81 memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8); 82 isa_register_ioport(isadev, &s->io, isa->iobase); 83 } 84 85 static void serial_isa_build_aml(ISADevice *isadev, Aml *scope) 86 { 87 ISASerialState *isa = ISA_SERIAL(isadev); 88 Aml *dev; 89 Aml *crs; 90 91 crs = aml_resource_template(); 92 aml_append(crs, aml_io(AML_DECODE16, isa->iobase, isa->iobase, 0x00, 0x08)); 93 aml_append(crs, aml_irq_no_flags(isa->isairq)); 94 95 dev = aml_device("COM%d", isa->index + 1); 96 aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0501"))); 97 aml_append(dev, aml_name_decl("_UID", aml_int(isa->index + 1))); 98 aml_append(dev, aml_name_decl("_STA", aml_int(0xf))); 99 aml_append(dev, aml_name_decl("_CRS", crs)); 100 101 aml_append(scope, dev); 102 } 103 104 static const VMStateDescription vmstate_isa_serial = { 105 .name = "serial", 106 .version_id = 3, 107 .minimum_version_id = 2, 108 .fields = (VMStateField[]) { 109 VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState), 110 VMSTATE_END_OF_LIST() 111 } 112 }; 113 114 static Property serial_isa_properties[] = { 115 DEFINE_PROP_UINT32("index", ISASerialState, index, -1), 116 DEFINE_PROP_UINT32("iobase", ISASerialState, iobase, -1), 117 DEFINE_PROP_UINT32("irq", ISASerialState, isairq, -1), 118 DEFINE_PROP_CHR("chardev", ISASerialState, state.chr), 119 DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0), 120 DEFINE_PROP_END_OF_LIST(), 121 }; 122 123 static void serial_isa_class_initfn(ObjectClass *klass, void *data) 124 { 125 DeviceClass *dc = DEVICE_CLASS(klass); 126 ISADeviceClass *isa = ISA_DEVICE_CLASS(klass); 127 128 dc->realize = serial_isa_realizefn; 129 dc->vmsd = &vmstate_isa_serial; 130 isa->build_aml = serial_isa_build_aml; 131 device_class_set_props(dc, serial_isa_properties); 132 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 133 } 134 135 static void serial_isa_initfn(Object *o) 136 { 137 ISASerialState *self = ISA_SERIAL(o); 138 139 object_initialize_child(o, "serial", &self->state, TYPE_SERIAL); 140 } 141 142 static const TypeInfo serial_isa_info = { 143 .name = TYPE_ISA_SERIAL, 144 .parent = TYPE_ISA_DEVICE, 145 .instance_size = sizeof(ISASerialState), 146 .instance_init = serial_isa_initfn, 147 .class_init = serial_isa_class_initfn, 148 }; 149 150 static void serial_register_types(void) 151 { 152 type_register_static(&serial_isa_info); 153 } 154 155 type_init(serial_register_types) 156 157 static void serial_isa_init(ISABus *bus, int index, Chardev *chr) 158 { 159 DeviceState *dev; 160 ISADevice *isadev; 161 162 isadev = isa_new(TYPE_ISA_SERIAL); 163 dev = DEVICE(isadev); 164 qdev_prop_set_uint32(dev, "index", index); 165 qdev_prop_set_chr(dev, "chardev", chr); 166 isa_realize_and_unref(isadev, bus, &error_fatal); 167 } 168 169 void serial_hds_isa_init(ISABus *bus, int from, int to) 170 { 171 int i; 172 173 assert(from >= 0); 174 assert(to <= MAX_ISA_SERIAL_PORTS); 175 176 for (i = from; i < to; ++i) { 177 if (serial_hd(i)) { 178 serial_isa_init(bus, i, serial_hd(i)); 179 } 180 } 181 } 182