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
  35 typedef struct PCISerialState {
  36     PCIDevice dev;
  37     SerialState state;
  38     uint8_t prog_if;
  39 } PCISerialState;
  40
  41
  42 static void serial_pci_realize(PCIDevice *dev, Error **errp)
  43 {
  44     PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
  45     SerialState *s = &pci->state;
  46     Error *err = NULL;
  47
  48     s->baudbase = 115200;
  49     serial_realize_core(s, &err);
  50     if (err != NULL) {
  51         error_propagate(errp, err);
  52         return;
  53     }
  54
  55     pci->dev.config[PCI_CLASS_PROG] = pci->prog_if;
  56     pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
  57     s->irq = pci_allocate_irq(&pci->dev);
  58
  59     memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, "serial", 8);
  60     pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
  61 }
  62
  63 static void serial_pci_exit(PCIDevice *dev)
  64 {
  65     PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
  66     SerialState *s = &pci->state;
  67
  68     serial_exit_core(s);
  69     qemu_free_irq(s->irq);
  70 }
  71
  72 static const VMStateDescription vmstate_pci_serial = {
  73     .name = "pci-serial",
  74     .version_id = 1,
  75     .minimum_version_id = 1,
  76     .fields = (VMStateField[]) {
  77         VMSTATE_PCI_DEVICE(dev, PCISerialState),
  78         VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState),
  79         VMSTATE_END_OF_LIST()
  80     }
  81 };
  82
  83 static Property serial_pci_properties[] = {
  84     DEFINE_PROP_CHR("chardev",  PCISerialState, state.chr),
  85     DEFINE_PROP_UINT8("prog_if",  PCISerialState, prog_if, 0x02),
  86     DEFINE_PROP_END_OF_LIST(),
  87 };
  88
  89 static void serial_pci_class_initfn(ObjectClass *klass, void *data)
  90 {
  91     DeviceClass *dc = DEVICE_CLASS(klass);
  92     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
  93     pc->realize = serial_pci_realize;
  94     pc->exit = serial_pci_exit;
  95     pc->vendor_id = PCI_VENDOR_ID_REDHAT;
  96     pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL;
  97     pc->revision = 1;
  98     pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
  99     dc->vmsd = &vmstate_pci_serial;
 100     dc->props = serial_pci_properties;
 101     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 102 }
 103
 104 static const TypeInfo serial_pci_info = {
 105     .name          = "pci-serial",
 106     .parent        = TYPE_PCI_DEVICE,
 107     .instance_size = sizeof(PCISerialState),
 108     .class_init    = serial_pci_class_initfn,
 109     .interfaces = (InterfaceInfo[]) {
 110         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 111         { },
 112     },
 113 };
 114
 115 static void serial_pci_register_types(void)
 116 {
 117     type_register_static(&serial_pci_info);
 118 }
 119
 120 type_init(serial_pci_register_types)