LXR qemu/hw/char/serial-pci.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/* see docs/specs/pci-serial.txt */
  27
  28#include "qemu/osdep.h"
  29#include "qapi/error.h"
  30#include "qemu/module.h"
  31#include "hw/char/serial.h"
  32#include "hw/irq.h"
  33#include "hw/pci/pci.h"
  34#include "hw/qdev-properties.h"
  35#include "migration/vmstate.h"
  36#include "qom/object.h"
  37
  38struct PCISerialState {
  39    PCIDevice dev;
  40    SerialState state;
  41    uint8_t prog_if;
  42};
  43
  44#define TYPE_PCI_SERIAL "pci-serial"
  45OBJECT_DECLARE_SIMPLE_TYPE(PCISerialState, PCI_SERIAL)
  46
  47static void serial_pci_realize(PCIDevice *dev, Error **errp)
  48{
  49    PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
  50    SerialState *s = &pci->state;
  51
  52    if (!qdev_realize(DEVICE(s), NULL, errp)) {
  53        return;
  54    }
  55
  56    pci->dev.config[PCI_CLASS_PROG] = pci->prog_if;
  57    pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
  58    s->irq = pci_allocate_irq(&pci->dev);
  59
  60    memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, "serial", 8);
  61    pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
  62}
  63
  64static void serial_pci_exit(PCIDevice *dev)
  65{
  66    PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
  67    SerialState *s = &pci->state;
  68
  69    qdev_unrealize(DEVICE(s));
  70    qemu_free_irq(s->irq);
  71}
  72
  73static const VMStateDescription vmstate_pci_serial = {
  74    .name = "pci-serial",
  75    .version_id = 1,
  76    .minimum_version_id = 1,
  77    .fields = (VMStateField[]) {
  78        VMSTATE_PCI_DEVICE(dev, PCISerialState),
  79        VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState),
  80        VMSTATE_END_OF_LIST()
  81    }
  82};
  83
  84static Property serial_pci_properties[] = {
  85    DEFINE_PROP_UINT8("prog_if",  PCISerialState, prog_if, 0x02),
  86    DEFINE_PROP_END_OF_LIST(),
  87};
  88
  89static void serial_pci_class_initfn(ObjectClass *klass, void *data)
  90{
  91    DeviceClass *dc = DEVICE_CLASS(klass);
  92    PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
  93    pc->realize = serial_pci_realize;
  94    pc->exit = serial_pci_exit;
  95    pc->vendor_id = PCI_VENDOR_ID_REDHAT;
  96    pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL;
  97    pc->revision = 1;
  98    pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
  99    dc->vmsd = &vmstate_pci_serial;
 100    device_class_set_props(dc, serial_pci_properties);
 101    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 102}
 103
 104static void serial_pci_init(Object *o)
 105{
 106    PCISerialState *ps = PCI_SERIAL(o);
 107
 108    object_initialize_child(o, "serial", &ps->state, TYPE_SERIAL);
 109
 110    qdev_alias_all_properties(DEVICE(&ps->state), o);
 111}
 112
 113static const TypeInfo serial_pci_info = {
 114    .name          = TYPE_PCI_SERIAL,
 115    .parent        = TYPE_PCI_DEVICE,
 116    .instance_size = sizeof(PCISerialState),
 117    .instance_init = serial_pci_init,
 118    .class_init    = serial_pci_class_initfn,
 119    .interfaces = (InterfaceInfo[]) {
 120        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 121        { },
 122    },
 123};
 124
 125static void serial_pci_register_types(void)
 126{
 127    type_register_static(&serial_pci_info);
 128}
 129
 130type_init(serial_pci_register_types)
 131