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