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 "hw/char/serial.h"
  27 #include "hw/isa/isa.h"
  28
  29 #define ISA_SERIAL(obj) OBJECT_CHECK(ISASerialState, (obj), TYPE_ISA_SERIAL)
  30
  31 typedef struct ISASerialState {
  32     ISADevice parent_obj;
  33
  34     uint32_t index;
  35     uint32_t iobase;
  36     uint32_t isairq;
  37     SerialState state;
  38 } ISASerialState;
  39
  40 static const int isa_serial_io[MAX_SERIAL_PORTS] = {
  41     0x3f8, 0x2f8, 0x3e8, 0x2e8
  42 };
  43 static const int isa_serial_irq[MAX_SERIAL_PORTS] = {
  44     4, 3, 4, 3
  45 };
  46
  47 static void serial_isa_realizefn(DeviceState *dev, Error **errp)
  48 {
  49     static int index;
  50     ISADevice *isadev = ISA_DEVICE(dev);
  51     ISASerialState *isa = ISA_SERIAL(dev);
  52     SerialState *s = &isa->state;
  53
  54     if (isa->index == -1) {
  55         isa->index = index;
  56     }
  57     if (isa->index >= MAX_SERIAL_PORTS) {
  58         error_setg(errp, "Max. supported number of ISA serial ports is %d.",
  59                    MAX_SERIAL_PORTS);
  60         return;
  61     }
  62     if (isa->iobase == -1) {
  63         isa->iobase = isa_serial_io[isa->index];
  64     }
  65     if (isa->isairq == -1) {
  66         isa->isairq = isa_serial_irq[isa->index];
  67     }
  68     index++;
  69
  70     s->baudbase = 115200;
  71     isa_init_irq(isadev, &s->irq, isa->isairq);
  72     serial_realize_core(s, errp);
  73     qdev_set_legacy_instance_id(dev, isa->iobase, 3);
  74
  75     memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8);
  76     isa_register_ioport(isadev, &s->io, isa->iobase);
  77 }
  78
  79 static const VMStateDescription vmstate_isa_serial = {
  80     .name = "serial",
  81     .version_id = 3,
  82     .minimum_version_id = 2,
  83     .fields = (VMStateField[]) {
  84         VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
  85         VMSTATE_END_OF_LIST()
  86     }
  87 };
  88
  89 static Property serial_isa_properties[] = {
  90     DEFINE_PROP_UINT32("index",  ISASerialState, index,   -1),
  91     DEFINE_PROP_UINT32("iobase",  ISASerialState, iobase,  -1),
  92     DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
  93     DEFINE_PROP_CHR("chardev",   ISASerialState, state.chr),
  94     DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
  95     DEFINE_PROP_END_OF_LIST(),
  96 };
  97
  98 static void serial_isa_class_initfn(ObjectClass *klass, void *data)
  99 {
 100     DeviceClass *dc = DEVICE_CLASS(klass);
 101
 102     dc->realize = serial_isa_realizefn;
 103     dc->vmsd = &vmstate_isa_serial;
 104     dc->props = serial_isa_properties;
 105     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 106 }
 107
 108 static const TypeInfo serial_isa_info = {
 109     .name          = TYPE_ISA_SERIAL,
 110     .parent        = TYPE_ISA_DEVICE,
 111     .instance_size = sizeof(ISASerialState),
 112     .class_init    = serial_isa_class_initfn,
 113 };
 114
 115 static void serial_register_types(void)
 116 {
 117     type_register_static(&serial_isa_info);
 118 }
 119
 120 type_init(serial_register_types)
 121
 122 bool serial_isa_init(ISABus *bus, int index, CharDriverState *chr)
 123 {
 124     DeviceState *dev;
 125     ISADevice *isadev;
 126
 127     isadev = isa_try_create(bus, TYPE_ISA_SERIAL);
 128     if (!isadev) {
 129         return false;
 130     }
 131     dev = DEVICE(isadev);
 132     qdev_prop_set_uint32(dev, "index", index);
 133     qdev_prop_set_chr(dev, "chardev", chr);
 134     if (qdev_init(dev) < 0) {
 135         return false;
 136     }
 137     return true;
 138 }