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 "qemu/osdep.h"
  27#include "qapi/error.h"
  28#include "qemu/module.h"
  29#include "sysemu/sysemu.h"
  30#include "hw/char/serial.h"
  31#include "hw/isa/isa.h"
  32#include "hw/qdev-properties.h"
  33#include "migration/vmstate.h"
  34
  35#define ISA_SERIAL(obj) OBJECT_CHECK(ISASerialState, (obj), TYPE_ISA_SERIAL)
  36
  37typedef struct ISASerialState {
  38    ISADevice parent_obj;
  39
  40    uint32_t index;
  41    uint32_t iobase;
  42    uint32_t isairq;
  43    SerialState state;
  44} ISASerialState;
  45
  46static const int isa_serial_io[MAX_ISA_SERIAL_PORTS] = {
  47    0x3f8, 0x2f8, 0x3e8, 0x2e8
  48};
  49static const int isa_serial_irq[MAX_ISA_SERIAL_PORTS] = {
  50    4, 3, 4, 3
  51};
  52
  53static void serial_isa_realizefn(DeviceState *dev, Error **errp)
  54{
  55    static int index;
  56    ISADevice *isadev = ISA_DEVICE(dev);
  57    ISASerialState *isa = ISA_SERIAL(dev);
  58    SerialState *s = &isa->state;
  59
  60    if (isa->index == -1) {
  61        isa->index = index;
  62    }
  63    if (isa->index >= MAX_ISA_SERIAL_PORTS) {
  64        error_setg(errp, "Max. supported number of ISA serial ports is %d.",
  65                   MAX_ISA_SERIAL_PORTS);
  66        return;
  67    }
  68    if (isa->iobase == -1) {
  69        isa->iobase = isa_serial_io[isa->index];
  70    }
  71    if (isa->isairq == -1) {
  72        isa->isairq = isa_serial_irq[isa->index];
  73    }
  74    index++;
  75
  76    s->baudbase = 115200;
  77    isa_init_irq(isadev, &s->irq, isa->isairq);
  78    serial_realize_core(s, 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
  85static const VMStateDescription vmstate_isa_serial = {
  86    .name = "serial",
  87    .version_id = 3,
  88    .minimum_version_id = 2,
  89    .fields = (VMStateField[]) {
  90        VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
  91        VMSTATE_END_OF_LIST()
  92    }
  93};
  94
  95static Property serial_isa_properties[] = {
  96    DEFINE_PROP_UINT32("index",  ISASerialState, index,   -1),
  97    DEFINE_PROP_UINT32("iobase",  ISASerialState, iobase,  -1),
  98    DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
  99    DEFINE_PROP_CHR("chardev",   ISASerialState, state.chr),
 100    DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
 101    DEFINE_PROP_END_OF_LIST(),
 102};
 103
 104static void serial_isa_class_initfn(ObjectClass *klass, void *data)
 105{
 106    DeviceClass *dc = DEVICE_CLASS(klass);
 107
 108    dc->realize = serial_isa_realizefn;
 109    dc->vmsd = &vmstate_isa_serial;
 110    dc->props = serial_isa_properties;
 111    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 112}
 113
 114static const TypeInfo serial_isa_info = {
 115    .name          = TYPE_ISA_SERIAL,
 116    .parent        = TYPE_ISA_DEVICE,
 117    .instance_size = sizeof(ISASerialState),
 118    .class_init    = serial_isa_class_initfn,
 119};
 120
 121static void serial_register_types(void)
 122{
 123    type_register_static(&serial_isa_info);
 124}
 125
 126type_init(serial_register_types)
 127
 128static void serial_isa_init(ISABus *bus, int index, Chardev *chr)
 129{
 130    DeviceState *dev;
 131    ISADevice *isadev;
 132
 133    isadev = isa_create(bus, TYPE_ISA_SERIAL);
 134    dev = DEVICE(isadev);
 135    qdev_prop_set_uint32(dev, "index", index);
 136    qdev_prop_set_chr(dev, "chardev", chr);
 137    qdev_init_nofail(dev);
 138}
 139
 140void serial_hds_isa_init(ISABus *bus, int from, int to)
 141{
 142    int i;
 143
 144    assert(from >= 0);
 145    assert(to <= MAX_ISA_SERIAL_PORTS);
 146
 147    for (i = from; i < to; ++i) {
 148        if (serial_hd(i)) {
 149            serial_isa_init(bus, i, serial_hd(i));
 150        }
 151    }
 152}
 153