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