qemu/hw/char/serial-pci.c
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   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
  37typedef struct PCISerialState {
  38    PCIDevice dev;
  39    SerialState state;
  40    uint8_t prog_if;
  41} PCISerialState;
  42
  43
  44static void serial_pci_realize(PCIDevice *dev, Error **errp)
  45{
  46    PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
  47    SerialState *s = &pci->state;
  48    Error *err = NULL;
  49
  50    s->baudbase = 115200;
  51    serial_realize_core(s, &err);
  52    if (err != NULL) {
  53        error_propagate(errp, err);
  54        return;
  55    }
  56
  57    pci->dev.config[PCI_CLASS_PROG] = pci->prog_if;
  58    pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
  59    s->irq = pci_allocate_irq(&pci->dev);
  60
  61    memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, "serial", 8);
  62    pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
  63}
  64
  65static void serial_pci_exit(PCIDevice *dev)
  66{
  67    PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
  68    SerialState *s = &pci->state;
  69
  70    serial_exit_core(s);
  71    qemu_free_irq(s->irq);
  72}
  73
  74static const VMStateDescription vmstate_pci_serial = {
  75    .name = "pci-serial",
  76    .version_id = 1,
  77    .minimum_version_id = 1,
  78    .fields = (VMStateField[]) {
  79        VMSTATE_PCI_DEVICE(dev, PCISerialState),
  80        VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState),
  81        VMSTATE_END_OF_LIST()
  82    }
  83};
  84
  85static Property serial_pci_properties[] = {
  86    DEFINE_PROP_CHR("chardev",  PCISerialState, state.chr),
  87    DEFINE_PROP_UINT8("prog_if",  PCISerialState, prog_if, 0x02),
  88    DEFINE_PROP_END_OF_LIST(),
  89};
  90
  91static void serial_pci_class_initfn(ObjectClass *klass, void *data)
  92{
  93    DeviceClass *dc = DEVICE_CLASS(klass);
  94    PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
  95    pc->realize = serial_pci_realize;
  96    pc->exit = serial_pci_exit;
  97    pc->vendor_id = PCI_VENDOR_ID_REDHAT;
  98    pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL;
  99    pc->revision = 1;
 100    pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
 101    dc->vmsd = &vmstate_pci_serial;
 102    dc->props = serial_pci_properties;
 103    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 104}
 105
 106static const TypeInfo serial_pci_info = {
 107    .name          = "pci-serial",
 108    .parent        = TYPE_PCI_DEVICE,
 109    .instance_size = sizeof(PCISerialState),
 110    .class_init    = serial_pci_class_initfn,
 111    .interfaces = (InterfaceInfo[]) {
 112        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 113        { },
 114    },
 115};
 116
 117static void serial_pci_register_types(void)
 118{
 119    type_register_static(&serial_pci_info);
 120}
 121
 122type_init(serial_pci_register_types)
 123