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 "hw/char/serial.h"
  29 #include "hw/isa/isa.h"
  30
  31 #define ISA_SERIAL(obj) OBJECT_CHECK(ISASerialState, (obj), TYPE_ISA_SERIAL)
  32
  33 typedef struct ISASerialState {
  34     ISADevice parent_obj;
  35
  36     uint32_t index;
  37     uint32_t iobase;
  38     uint32_t isairq;
  39     SerialState state;
  40 } ISASerialState;
  41
  42 static const int isa_serial_io[MAX_SERIAL_PORTS] = {
  43     0x3f8, 0x2f8, 0x3e8, 0x2e8
  44 };
  45 static const int isa_serial_irq[MAX_SERIAL_PORTS] = {
  46     4, 3, 4, 3
  47 };
  48
  49 static void serial_isa_realizefn(DeviceState *dev, Error **errp)
  50 {
  51     static int index;
  52     ISADevice *isadev = ISA_DEVICE(dev);
  53     ISASerialState *isa = ISA_SERIAL(dev);
  54     SerialState *s = &isa->state;
  55
  56     if (isa->index == -1) {
  57         isa->index = index;
  58     }
  59     if (isa->index >= MAX_SERIAL_PORTS) {
  60         error_setg(errp, "Max. supported number of ISA serial ports is %d.",
  61                    MAX_SERIAL_PORTS);
  62         return;
  63     }
  64     if (isa->iobase == -1) {
  65         isa->iobase = isa_serial_io[isa->index];
  66     }
  67     if (isa->isairq == -1) {
  68         isa->isairq = isa_serial_irq[isa->index];
  69     }
  70     index++;
  71
  72     s->baudbase = 115200;
  73     isa_init_irq(isadev, &s->irq, isa->isairq);
  74     serial_realize_core(s, errp);
  75     qdev_set_legacy_instance_id(dev, isa->iobase, 3);
  76
  77     memory_region_init_io(&s->io, OBJECT(isa), &serial_io_ops, s, "serial", 8);
  78     isa_register_ioport(isadev, &s->io, isa->iobase);
  79 }
  80
  81 static const VMStateDescription vmstate_isa_serial = {
  82     .name = "serial",
  83     .version_id = 3,
  84     .minimum_version_id = 2,
  85     .fields = (VMStateField[]) {
  86         VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState),
  87         VMSTATE_END_OF_LIST()
  88     }
  89 };
  90
  91 static Property serial_isa_properties[] = {
  92     DEFINE_PROP_UINT32("index",  ISASerialState, index,   -1),
  93     DEFINE_PROP_UINT32("iobase",  ISASerialState, iobase,  -1),
  94     DEFINE_PROP_UINT32("irq",    ISASerialState, isairq,  -1),
  95     DEFINE_PROP_CHR("chardev",   ISASerialState, state.chr),
  96     DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0),
  97     DEFINE_PROP_END_OF_LIST(),
  98 };
  99
 100 static void serial_isa_class_initfn(ObjectClass *klass, void *data)
 101 {
 102     DeviceClass *dc = DEVICE_CLASS(klass);
 103
 104     dc->realize = serial_isa_realizefn;
 105     dc->vmsd = &vmstate_isa_serial;
 106     dc->props = serial_isa_properties;
 107     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 108 }
 109
 110 static const TypeInfo serial_isa_info = {
 111     .name          = TYPE_ISA_SERIAL,
 112     .parent        = TYPE_ISA_DEVICE,
 113     .instance_size = sizeof(ISASerialState),
 114     .class_init    = serial_isa_class_initfn,
 115 };
 116
 117 static void serial_register_types(void)
 118 {
 119     type_register_static(&serial_isa_info);
 120 }
 121
 122 type_init(serial_register_types)
 123
 124 static void serial_isa_init(ISABus *bus, int index, CharDriverState *chr)
 125 {
 126     DeviceState *dev;
 127     ISADevice *isadev;
 128
 129     isadev = isa_create(bus, TYPE_ISA_SERIAL);
 130     dev = DEVICE(isadev);
 131     qdev_prop_set_uint32(dev, "index", index);
 132     qdev_prop_set_chr(dev, "chardev", chr);
 133     qdev_init_nofail(dev);
 134 }
 135
 136 void serial_hds_isa_init(ISABus *bus, int n)
 137 {
 138     int i;
 139
 140     assert(n <= MAX_SERIAL_PORTS);
 141
 142     for (i = 0; i < n; ++i) {
 143         if (serial_hds[i]) {
 144             serial_isa_init(bus, i, serial_hds[i]);
 145         }
 146     }
 147 }