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 "hw/char/serial.h"
  29#include "hw/isa/isa.h"
  30
  31#define ISA_SERIAL(obj) OBJECT_CHECK(ISASerialState, (obj), TYPE_ISA_SERIAL)
  32
  33typedef struct ISASerialState {
  34    ISADevice parent_obj;
  35
  36    uint32_t index;
  37    uint32_t iobase;
  38    uint32_t isairq;
  39    SerialState state;
  40} ISASerialState;
  41
  42static const int isa_serial_io[MAX_SERIAL_PORTS] = {
  43    0x3f8, 0x2f8, 0x3e8, 0x2e8
  44};
  45static const int isa_serial_irq[MAX_SERIAL_PORTS] = {
  46    4, 3, 4, 3
  47};
  48
  49static void serial_isa_realizefn(DeviceState *dev, Error **errp)
  50{
  51    static int index;
  52    ISADevice *isadev = ISA_DEVICE(dev);
  53    ISASerialState *isa = ISA_SERIAL(dev);
  54    SerialState *s = &isa->state;
  55
  56    if (isa->index == -1) {
  57        isa->index = index;
  58    }
  59    if (isa->index >= MAX_SERIAL_PORTS) {
  60        error_setg(errp, "Max. supported number of ISA serial ports is %d.",
  61                   MAX_SERIAL_PORTS);
  62        return;
  63    }
  64    if (isa->iobase == -1) {
  65        isa->iobase = isa_serial_io[isa->index];
  66    }
  67    if (isa->isairq == -1) {
  68        isa->isairq = isa_serial_irq[isa->index];
  69    }
  70    index++;
  71
  72    s->baudbase = 115200;
  73    isa_init_irq(isadev, &s->irq, isa->isairq);
  74    serial_realize_core(s, errp);
  75    qdev_set_legacy_instance_id(dev, isa->iobase, 3);
  76
  77    memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8);
  78    isa_register_ioport(isadev, &s->io, isa->iobase);
  79}
  80
  81static const VMStateDescription vmstate_isa_serial = {
  82    .name = "serial",
  83    .version_id = 3,
  84    .minimum_version_id = 2,
  85    .fields = (VMStateField[]) {
  86        VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
  87        VMSTATE_END_OF_LIST()
  88    }
  89};
  90
  91static Property serial_isa_properties[] = {
  92    DEFINE_PROP_UINT32("index",  ISASerialState, index,   -1),
  93    DEFINE_PROP_UINT32("iobase",  ISASerialState, iobase,  -1),
  94    DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
  95    DEFINE_PROP_CHR("chardev",   ISASerialState, state.chr),
  96    DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
  97    DEFINE_PROP_END_OF_LIST(),
  98};
  99
 100static void serial_isa_class_initfn(ObjectClass *klass, void *data)
 101{
 102    DeviceClass *dc = DEVICE_CLASS(klass);
 103
 104    dc->realize = serial_isa_realizefn;
 105    dc->vmsd = &vmstate_isa_serial;
 106    dc->props = serial_isa_properties;
 107    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 108}
 109
 110static const TypeInfo serial_isa_info = {
 111    .name          = TYPE_ISA_SERIAL,
 112    .parent        = TYPE_ISA_DEVICE,
 113    .instance_size = sizeof(ISASerialState),
 114    .class_init    = serial_isa_class_initfn,
 115};
 116
 117static void serial_register_types(void)
 118{
 119    type_register_static(&serial_isa_info);
 120}
 121
 122type_init(serial_register_types)
 123
 124static void serial_isa_init(ISABus *bus, int index, CharDriverState *chr)
 125{
 126    DeviceState *dev;
 127    ISADevice *isadev;
 128
 129    isadev = isa_create(bus, TYPE_ISA_SERIAL);
 130    dev = DEVICE(isadev);
 131    qdev_prop_set_uint32(dev, "index", index);
 132    qdev_prop_set_chr(dev, "chardev", chr);
 133    qdev_init_nofail(dev);
 134}
 135
 136void serial_hds_isa_init(ISABus *bus, int n)
 137{
 138    int i;
 139
 140    assert(n <= MAX_SERIAL_PORTS);
 141
 142    for (i = 0; i < n; ++i) {
 143        if (serial_hds[i]) {
 144            serial_isa_init(bus, i, serial_hds[i]);
 145        }
 146    }
 147}
 148