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 int serial_isa_initfn(ISADevice *dev)
  48 {
  49     static int index;
  50     ISASerialState *isa = ISA_SERIAL(dev);
  51     SerialState *s = &isa->state;
  52
  53     if (isa->index == -1) {
  54         isa->index = index;
  55     }
  56     if (isa->index >= MAX_SERIAL_PORTS) {
  57         return -1;
  58     }
  59     if (isa->iobase == -1) {
  60         isa->iobase = isa_serial_io[isa->index];
  61     }
  62     if (isa->isairq == -1) {
  63         isa->isairq = isa_serial_irq[isa->index];
  64     }
  65     index++;
  66
  67     s->baudbase = 115200;
  68     isa_init_irq(dev, &s->irq, isa->isairq);
  69     serial_init_core(s);
  70     qdev_set_legacy_instance_id(&dev->qdev, isa->iobase, 3);
  71
  72     memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8);
  73     isa_register_ioport(dev, &s->io, isa->iobase);
  74     return 0;
  75 }
  76
  77 static const VMStateDescription vmstate_isa_serial = {
  78     .name = "serial",
  79     .version_id = 3,
  80     .minimum_version_id = 2,
  81     .fields = (VMStateField[]) {
  82         VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
  83         VMSTATE_END_OF_LIST()
  84     }
  85 };
  86
  87 static Property serial_isa_properties[] = {
  88     DEFINE_PROP_UINT32("index",  ISASerialState, index,   -1),
  89     DEFINE_PROP_HEX32("iobase",  ISASerialState, iobase,  -1),
  90     DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
  91     DEFINE_PROP_CHR("chardev",   ISASerialState, state.chr),
  92     DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
  93     DEFINE_PROP_END_OF_LIST(),
  94 };
  95
  96 static void serial_isa_class_initfn(ObjectClass *klass, void *data)
  97 {
  98     DeviceClass *dc = DEVICE_CLASS(klass);
  99     ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
 100     ic->init = serial_isa_initfn;
 101     dc->vmsd = &vmstate_isa_serial;
 102     dc->props = serial_isa_properties;
 103 }
 104
 105 static const TypeInfo serial_isa_info = {
 106     .name          = TYPE_ISA_SERIAL,
 107     .parent        = TYPE_ISA_DEVICE,
 108     .instance_size = sizeof(ISASerialState),
 109     .class_init    = serial_isa_class_initfn,
 110 };
 111
 112 static void serial_register_types(void)
 113 {
 114     type_register_static(&serial_isa_info);
 115 }
 116
 117 type_init(serial_register_types)
 118
 119 bool serial_isa_init(ISABus *bus, int index, CharDriverState *chr)
 120 {
 121     ISADevice *dev;
 122
 123     dev = isa_try_create(bus, TYPE_ISA_SERIAL);
 124     if (!dev) {
 125         return false;
 126     }
 127     qdev_prop_set_uint32(&dev->qdev, "index", index);
 128     qdev_prop_set_chr(&dev->qdev, "chardev", chr);
 129     if (qdev_init(&dev->qdev) < 0) {
 130         return false;
 131     }
 132     return true;
 133 }