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