hw/char/serial-pci.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 /* see docs/specs/pci-serial.txt */
  27
  28 #include "qemu/osdep.h"
  29 #include "qapi/error.h"
  30 #include "qemu/module.h"
  31 #include "hw/char/serial.h"
  32 #include "hw/irq.h"
  33 #include "hw/pci/pci.h"
  34 #include "hw/qdev-properties.h"
  35 #include "migration/vmstate.h"
  36
  37 typedef struct PCISerialState {
  38     PCIDevice dev;
  39     SerialState state;
  40     uint8_t prog_if;
  41 } PCISerialState;
  42
  43 #define TYPE_PCI_SERIAL "pci-serial"
  44 #define PCI_SERIAL(s) OBJECT_CHECK(PCISerialState, (s), TYPE_PCI_SERIAL)
  45
  46 static void serial_pci_realize(PCIDevice *dev, Error **errp)
  47 {
  48     PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
  49     SerialState *s = &pci->state;
  50     Error *err = NULL;
  51
  52     object_property_set_bool(OBJECT(s), true, "realized", &err);
  53     if (err != NULL) {
  54         error_propagate(errp, err);
  55         return;
  56     }
  57
  58     pci->dev.config[PCI_CLASS_PROG] = pci->prog_if;
  59     pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
  60     s->irq = pci_allocate_irq(&pci->dev);
  61
  62     memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, "serial", 8);
  63     pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
  64 }
  65
  66 static void serial_pci_exit(PCIDevice *dev)
  67 {
  68     PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
  69     SerialState *s = &pci->state;
  70
  71     object_property_set_bool(OBJECT(s), false, "realized", &error_abort);
  72     qemu_free_irq(s->irq);
  73 }
  74
  75 static const VMStateDescription vmstate_pci_serial = {
  76     .name = "pci-serial",
  77     .version_id = 1,
  78     .minimum_version_id = 1,
  79     .fields = (VMStateField[]) {
  80         VMSTATE_PCI_DEVICE(dev, PCISerialState),
  81         VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState),
  82         VMSTATE_END_OF_LIST()
  83     }
  84 };
  85
  86 static Property serial_pci_properties[] = {
  87     DEFINE_PROP_CHR("chardev",  PCISerialState, state.chr),
  88     DEFINE_PROP_UINT8("prog_if",  PCISerialState, prog_if, 0x02),
  89     DEFINE_PROP_END_OF_LIST(),
  90 };
  91
  92 static void serial_pci_class_initfn(ObjectClass *klass, void *data)
  93 {
  94     DeviceClass *dc = DEVICE_CLASS(klass);
  95     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
  96     pc->realize = serial_pci_realize;
  97     pc->exit = serial_pci_exit;
  98     pc->vendor_id = PCI_VENDOR_ID_REDHAT;
  99     pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL;
 100     pc->revision = 1;
 101     pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
 102     dc->vmsd = &vmstate_pci_serial;
 103     device_class_set_props(dc, serial_pci_properties);
 104     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 105 }
 106
 107 static void serial_pci_init(Object *o)
 108 {
 109     PCISerialState *ps = PCI_SERIAL(o);
 110
 111     object_initialize_child(o, "serial", &ps->state, sizeof(ps->state),
 112                             TYPE_SERIAL, &error_abort, NULL);
 113 }
 114
 115 static const TypeInfo serial_pci_info = {
 116     .name          = TYPE_PCI_SERIAL,
 117     .parent        = TYPE_PCI_DEVICE,
 118     .instance_size = sizeof(PCISerialState),
 119     .instance_init = serial_pci_init,
 120     .class_init    = serial_pci_class_initfn,
 121     .interfaces = (InterfaceInfo[]) {
 122         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 123         { },
 124     },
 125 };
 126
 127 static void serial_pci_register_types(void)
 128 {
 129     type_register_static(&serial_pci_info);
 130 }
 131
 132 type_init(serial_pci_register_types)