qemu

serial-isa.c (5630B)

---

 /*
  * QEMU 16550A UART emulation
  *
  * Copyright (c) 2003-2004 Fabrice Bellard
  * Copyright (c) 2008 Citrix Systems, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
 
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qemu/module.h"
 #include "sysemu/sysemu.h"
 #include "hw/acpi/acpi_aml_interface.h"
 #include "hw/char/serial.h"
 #include "hw/isa/isa.h"
 #include "hw/qdev-properties.h"
 #include "migration/vmstate.h"
 #include "qom/object.h"
 
 OBJECT_DECLARE_SIMPLE_TYPE(ISASerialState, ISA_SERIAL)
 
 struct ISASerialState {
     ISADevice parent_obj;
 
     uint32_t index;
     uint32_t iobase;
     uint32_t isairq;
     SerialState state;
 };
 
 static const int isa_serial_io[MAX_ISA_SERIAL_PORTS] = {
     0x3f8, 0x2f8, 0x3e8, 0x2e8
 };
 static const int isa_serial_irq[MAX_ISA_SERIAL_PORTS] = {
     4, 3, 4, 3
 };
 
 static void serial_isa_realizefn(DeviceState *dev, Error **errp)
 {
     static int index;
     ISADevice *isadev = ISA_DEVICE(dev);
     ISASerialState *isa = ISA_SERIAL(dev);
     SerialState *s = &isa->state;
 
     if (isa->index == -1) {
         isa->index = index;
     }
     if (isa->index >= MAX_ISA_SERIAL_PORTS) {
         error_setg(errp, "Max. supported number of ISA serial ports is %d.",
                    MAX_ISA_SERIAL_PORTS);
         return;
     }
     if (isa->iobase == -1) {
         isa->iobase = isa_serial_io[isa->index];
     }
     if (isa->isairq == -1) {
         isa->isairq = isa_serial_irq[isa->index];
     }
     index++;
 
     s->irq = isa_get_irq(isadev, isa->isairq);
     qdev_realize(DEVICE(s), NULL, errp);
     qdev_set_legacy_instance_id(dev, isa->iobase, 3);
 
     memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8);
     isa_register_ioport(isadev, &s->io, isa->iobase);
 }
 
 static void serial_isa_build_aml(AcpiDevAmlIf *adev, Aml *scope)
 {
     ISASerialState *isa = ISA_SERIAL(adev);
     Aml *dev;
     Aml *crs;
 
     crs = aml_resource_template();
     aml_append(crs, aml_io(AML_DECODE16, isa->iobase, isa->iobase, 0x00, 0x08));
     aml_append(crs, aml_irq_no_flags(isa->isairq));
 
     dev = aml_device("COM%d", isa->index + 1);
     aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0501")));
     aml_append(dev, aml_name_decl("_UID", aml_int(isa->index + 1)));
     aml_append(dev, aml_name_decl("_STA", aml_int(0xf)));
     aml_append(dev, aml_name_decl("_CRS", crs));
 
     aml_append(scope, dev);
 }
 
 static const VMStateDescription vmstate_isa_serial = {
     .name = "serial",
     .version_id = 3,
     .minimum_version_id = 2,
     .fields = (VMStateField[]) {
         VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
         VMSTATE_END_OF_LIST()
     }
 };
 
 static Property serial_isa_properties[] = {
     DEFINE_PROP_UINT32("index",  ISASerialState, index,   -1),
     DEFINE_PROP_UINT32("iobase",  ISASerialState, iobase,  -1),
     DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
     DEFINE_PROP_END_OF_LIST(),
 };
 
 static void serial_isa_class_initfn(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
 
     dc->realize = serial_isa_realizefn;
     dc->vmsd = &vmstate_isa_serial;
     adevc->build_dev_aml = serial_isa_build_aml;
     device_class_set_props(dc, serial_isa_properties);
     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 }
 
 static void serial_isa_initfn(Object *o)
 {
     ISASerialState *self = ISA_SERIAL(o);
 
     object_initialize_child(o, "serial", &self->state, TYPE_SERIAL);
 
     qdev_alias_all_properties(DEVICE(&self->state), o);
 }
 
 static const TypeInfo serial_isa_info = {
     .name          = TYPE_ISA_SERIAL,
     .parent        = TYPE_ISA_DEVICE,
     .instance_size = sizeof(ISASerialState),
     .instance_init = serial_isa_initfn,
     .class_init    = serial_isa_class_initfn,
     .interfaces = (InterfaceInfo[]) {
         { TYPE_ACPI_DEV_AML_IF },
         { },
     },
 };
 
 static void serial_register_types(void)
 {
     type_register_static(&serial_isa_info);
 }
 
 type_init(serial_register_types)
 
 static void serial_isa_init(ISABus *bus, int index, Chardev *chr)
 {
     DeviceState *dev;
     ISADevice *isadev;
 
     isadev = isa_new(TYPE_ISA_SERIAL);
     dev = DEVICE(isadev);
     qdev_prop_set_uint32(dev, "index", index);
     qdev_prop_set_chr(dev, "chardev", chr);
     isa_realize_and_unref(isadev, bus, &error_fatal);
 }
 
 void serial_hds_isa_init(ISABus *bus, int from, int to)
 {
     int i;
 
     assert(from >= 0);
     assert(to <= MAX_ISA_SERIAL_PORTS);
 
     for (i = from; i < to; ++i) {
         if (serial_hd(i)) {
             serial_isa_init(bus, i, serial_hd(i));
         }
     }
 }