LXR qemu/hw/char/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/char/serial.h"
  27#include "hw/isa/isa.h"
  28
  29#define ISA_SERIAL(obj) OBJECT_CHECK(ISASerialState, (obj), TYPE_ISA_SERIAL)
  30
  31typedef struct ISASerialState {
  32    ISADevice parent_obj;
  33
  34    uint32_t index;
  35    uint32_t iobase;
  36    uint32_t isairq;
  37    SerialState state;
  38} ISASerialState;
  39
  40static const int isa_serial_io[MAX_SERIAL_PORTS] = {
  41    0x3f8, 0x2f8, 0x3e8, 0x2e8
  42};
  43static const int isa_serial_irq[MAX_SERIAL_PORTS] = {
  44    4, 3, 4, 3
  45};
  46
  47static int serial_isa_initfn(ISADevice *dev)
  48{
  49    static int index;
  50    ISASerialState *isa = ISA_SERIAL(dev);
  51    SerialState *s = &isa->state;
  52
  53    if (isa->index == -1) {
  54        isa->index = index;
  55    }
  56    if (isa->index >= MAX_SERIAL_PORTS) {
  57        return -1;
  58    }
  59    if (isa->iobase == -1) {
  60        isa->iobase = isa_serial_io[isa->index];
  61    }
  62    if (isa->isairq == -1) {
  63        isa->isairq = isa_serial_irq[isa->index];
  64    }
  65    index++;
  66
  67    s->baudbase = 115200;
  68    isa_init_irq(dev, &s->irq, isa->isairq);
  69    serial_init_core(s);
  70    qdev_set_legacy_instance_id(&dev->qdev, isa->iobase, 3);
  71
  72    memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8);
  73    isa_register_ioport(dev, &s->io, isa->iobase);
  74    return 0;
  75}
  76
  77static const VMStateDescription vmstate_isa_serial = {
  78    .name = "serial",
  79    .version_id = 3,
  80    .minimum_version_id = 2,
  81    .fields = (VMStateField[]) {
  82        VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
  83        VMSTATE_END_OF_LIST()
  84    }
  85};
  86
  87static Property serial_isa_properties[] = {
  88    DEFINE_PROP_UINT32("index",  ISASerialState, index,   -1),
  89    DEFINE_PROP_HEX32("iobase",  ISASerialState, iobase,  -1),
  90    DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
  91    DEFINE_PROP_CHR("chardev",   ISASerialState, state.chr),
  92    DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
  93    DEFINE_PROP_END_OF_LIST(),
  94};
  95
  96static void serial_isa_class_initfn(ObjectClass *klass, void *data)
  97{
  98    DeviceClass *dc = DEVICE_CLASS(klass);
  99    ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
 100    ic->init = serial_isa_initfn;
 101    dc->vmsd = &vmstate_isa_serial;
 102    dc->props = serial_isa_properties;
 103}
 104
 105static const TypeInfo serial_isa_info = {
 106    .name          = TYPE_ISA_SERIAL,
 107    .parent        = TYPE_ISA_DEVICE,
 108    .instance_size = sizeof(ISASerialState),
 109    .class_init    = serial_isa_class_initfn,
 110};
 111
 112static void serial_register_types(void)
 113{
 114    type_register_static(&serial_isa_info);
 115}
 116
 117type_init(serial_register_types)
 118
 119bool serial_isa_init(ISABus *bus, int index, CharDriverState *chr)
 120{
 121    ISADevice *dev;
 122
 123    dev = isa_try_create(bus, TYPE_ISA_SERIAL);
 124    if (!dev) {
 125        return false;
 126    }
 127    qdev_prop_set_uint32(&dev->qdev, "index", index);
 128    qdev_prop_set_chr(&dev->qdev, "chardev", chr);
 129    if (qdev_init(&dev->qdev) < 0) {
 130        return false;
 131    }
 132    return true;
 133}
 134