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/acpi/aml-build.h"
  31 #include "hw/char/serial.h"
  32 #include "hw/isa/isa.h"
  33 #include "hw/qdev-properties.h"
  34 #include "migration/vmstate.h"
  35 #include "qom/object.h"
  36
  37 typedef struct ISASerialState ISASerialState;
  38 DECLARE_INSTANCE_CHECKER(ISASerialState, ISA_SERIAL,
  39                          TYPE_ISA_SERIAL)
  40
  41 struct ISASerialState {
  42     ISADevice parent_obj;
  43
  44     uint32_t index;
  45     uint32_t iobase;
  46     uint32_t isairq;
  47     SerialState state;
  48 };
  49
  50 static const int isa_serial_io[MAX_ISA_SERIAL_PORTS] = {
  51     0x3f8, 0x2f8, 0x3e8, 0x2e8
  52 };
  53 static const int isa_serial_irq[MAX_ISA_SERIAL_PORTS] = {
  54     4, 3, 4, 3
  55 };
  56
  57 static void serial_isa_realizefn(DeviceState *dev, Error **errp)
  58 {
  59     static int index;
  60     ISADevice *isadev = ISA_DEVICE(dev);
  61     ISASerialState *isa = ISA_SERIAL(dev);
  62     SerialState *s = &isa->state;
  63
  64     if (isa->index == -1) {
  65         isa->index = index;
  66     }
  67     if (isa->index >= MAX_ISA_SERIAL_PORTS) {
  68         error_setg(errp, "Max. supported number of ISA serial ports is %d.",
  69                    MAX_ISA_SERIAL_PORTS);
  70         return;
  71     }
  72     if (isa->iobase == -1) {
  73         isa->iobase = isa_serial_io[isa->index];
  74     }
  75     if (isa->isairq == -1) {
  76         isa->isairq = isa_serial_irq[isa->index];
  77     }
  78     index++;
  79
  80     isa_init_irq(isadev, &s->irq, isa->isairq);
  81     qdev_realize(DEVICE(s), NULL, errp);
  82     qdev_set_legacy_instance_id(dev, isa->iobase, 3);
  83
  84     memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8);
  85     isa_register_ioport(isadev, &s->io, isa->iobase);
  86 }
  87
  88 static void serial_isa_build_aml(ISADevice *isadev, Aml *scope)
  89 {
  90     ISASerialState *isa = ISA_SERIAL(isadev);
  91     Aml *dev;
  92     Aml *crs;
  93
  94     crs = aml_resource_template();
  95     aml_append(crs, aml_io(AML_DECODE16, isa->iobase, isa->iobase, 0x00, 0x08));
  96     aml_append(crs, aml_irq_no_flags(isa->isairq));
  97
  98     dev = aml_device("COM%d", isa->index + 1);
  99     aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0501")));
 100     aml_append(dev, aml_name_decl("_UID", aml_int(isa->index + 1)));
 101     aml_append(dev, aml_name_decl("_STA", aml_int(0xf)));
 102     aml_append(dev, aml_name_decl("_CRS", crs));
 103
 104     aml_append(scope, dev);
 105 }
 106
 107 static const VMStateDescription vmstate_isa_serial = {
 108     .name = "serial",
 109     .version_id = 3,
 110     .minimum_version_id = 2,
 111     .fields = (VMStateField[]) {
 112         VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
 113         VMSTATE_END_OF_LIST()
 114     }
 115 };
 116
 117 static Property serial_isa_properties[] = {
 118     DEFINE_PROP_UINT32("index",  ISASerialState, index,   -1),
 119     DEFINE_PROP_UINT32("iobase",  ISASerialState, iobase,  -1),
 120     DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
 121     DEFINE_PROP_CHR("chardev",   ISASerialState, state.chr),
 122     DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
 123     DEFINE_PROP_END_OF_LIST(),
 124 };
 125
 126 static void serial_isa_class_initfn(ObjectClass *klass, void *data)
 127 {
 128     DeviceClass *dc = DEVICE_CLASS(klass);
 129     ISADeviceClass *isa = ISA_DEVICE_CLASS(klass);
 130
 131     dc->realize = serial_isa_realizefn;
 132     dc->vmsd = &vmstate_isa_serial;
 133     isa->build_aml = serial_isa_build_aml;
 134     device_class_set_props(dc, serial_isa_properties);
 135     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 136 }
 137
 138 static void serial_isa_initfn(Object *o)
 139 {
 140     ISASerialState *self = ISA_SERIAL(o);
 141
 142     object_initialize_child(o, "serial", &self->state, TYPE_SERIAL);
 143 }
 144
 145 static const TypeInfo serial_isa_info = {
 146     .name          = TYPE_ISA_SERIAL,
 147     .parent        = TYPE_ISA_DEVICE,
 148     .instance_size = sizeof(ISASerialState),
 149     .instance_init = serial_isa_initfn,
 150     .class_init    = serial_isa_class_initfn,
 151 };
 152
 153 static void serial_register_types(void)
 154 {
 155     type_register_static(&serial_isa_info);
 156 }
 157
 158 type_init(serial_register_types)
 159
 160 static void serial_isa_init(ISABus *bus, int index, Chardev *chr)
 161 {
 162     DeviceState *dev;
 163     ISADevice *isadev;
 164
 165     isadev = isa_new(TYPE_ISA_SERIAL);
 166     dev = DEVICE(isadev);
 167     qdev_prop_set_uint32(dev, "index", index);
 168     qdev_prop_set_chr(dev, "chardev", chr);
 169     isa_realize_and_unref(isadev, bus, &error_fatal);
 170 }
 171
 172 void serial_hds_isa_init(ISABus *bus, int from, int to)
 173 {
 174     int i;
 175
 176     assert(from >= 0);
 177     assert(to <= MAX_ISA_SERIAL_PORTS);
 178
 179     for (i = from; i < to; ++i) {
 180         if (serial_hd(i)) {
 181             serial_isa_init(bus, i, serial_hd(i));
 182         }
 183     }
 184 }