hw/serial-isa.c

   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 "hw/serial.h"
  27 #include "hw/isa.h"
  28
  29 typedef struct ISASerialState {
  30     ISADevice dev;
  31     uint32_t index;
  32     uint32_t iobase;
  33     uint32_t isairq;
  34     SerialState state;
  35 } ISASerialState;
  36
  37 static const int isa_serial_io[MAX_SERIAL_PORTS] = {
  38     0x3f8, 0x2f8, 0x3e8, 0x2e8
  39 };
  40 static const int isa_serial_irq[MAX_SERIAL_PORTS] = {
  41     4, 3, 4, 3
  42 };
  43
  44 static int serial_isa_initfn(ISADevice *dev)
  45 {
  46     static int index;
  47     ISASerialState *isa = DO_UPCAST(ISASerialState, dev, dev);
  48     SerialState *s = &isa->state;
  49
  50     if (isa->index == -1) {
  51         isa->index = index;
  52     }
  53     if (isa->index >= MAX_SERIAL_PORTS) {
  54         return -1;
  55     }
  56     if (isa->iobase == -1) {
  57         isa->iobase = isa_serial_io[isa->index];
  58     }
  59     if (isa->isairq == -1) {
  60         isa->isairq = isa_serial_irq[isa->index];
  61     }
  62     index++;
  63
  64     s->baudbase = 115200;
  65     isa_init_irq(dev, &s->irq, isa->isairq);
  66     serial_init_core(s);
  67     qdev_set_legacy_instance_id(&dev->qdev, isa->iobase, 3);
  68
  69     memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8);
  70     isa_register_ioport(dev, &s->io, isa->iobase);
  71     return 0;
  72 }
  73
  74 static const VMStateDescription vmstate_isa_serial = {
  75     .name = "serial",
  76     .version_id = 3,
  77     .minimum_version_id = 2,
  78     .fields = (VMStateField[]) {
  79         VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
  80         VMSTATE_END_OF_LIST()
  81     }
  82 };
  83
  84 static Property serial_isa_properties[] = {
  85     DEFINE_PROP_UINT32("index",  ISASerialState, index,   -1),
  86     DEFINE_PROP_HEX32("iobase",  ISASerialState, iobase,  -1),
  87     DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
  88     DEFINE_PROP_CHR("chardev",   ISASerialState, state.chr),
  89     DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
  90     DEFINE_PROP_END_OF_LIST(),
  91 };
  92
  93 static void serial_isa_class_initfn(ObjectClass *klass, void *data)
  94 {
  95     DeviceClass *dc = DEVICE_CLASS(klass);
  96     ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
  97     ic->init = serial_isa_initfn;
  98     dc->vmsd = &vmstate_isa_serial;
  99     dc->props = serial_isa_properties;
 100 }
 101
 102 static const TypeInfo serial_isa_info = {
 103     .name          = "isa-serial",
 104     .parent        = TYPE_ISA_DEVICE,
 105     .instance_size = sizeof(ISASerialState),
 106     .class_init    = serial_isa_class_initfn,
 107 };
 108
 109 static void serial_register_types(void)
 110 {
 111     type_register_static(&serial_isa_info);
 112 }
 113
 114 type_init(serial_register_types)
 115
 116 bool serial_isa_init(ISABus *bus, int index, CharDriverState *chr)
 117 {
 118     ISADevice *dev;
 119
 120     dev = isa_try_create(bus, "isa-serial");
 121     if (!dev) {
 122         return false;
 123     }
 124     qdev_prop_set_uint32(&dev->qdev, "index", index);
 125     qdev_prop_set_chr(&dev->qdev, "chardev", chr);
 126     if (qdev_init(&dev->qdev) < 0) {
 127         return false;
 128     }
 129     return true;
 130 }