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