qemu

FORK: QEMU emulator
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serial-pci.c (4102B)

      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 #include "qom/object.h"
     37 
     38 struct PCISerialState {
     39     PCIDevice dev;
     40     SerialState state;
     41     uint8_t prog_if;
     42 };
     43 
     44 #define TYPE_PCI_SERIAL "pci-serial"
     45 OBJECT_DECLARE_SIMPLE_TYPE(PCISerialState, PCI_SERIAL)
     46 
     47 static void serial_pci_realize(PCIDevice *dev, Error **errp)
     48 {
     49     PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
     50     SerialState *s = &pci->state;
     51 
     52     if (!qdev_realize(DEVICE(s), NULL, errp)) {
     53         return;
     54     }
     55 
     56     pci->dev.config[PCI_CLASS_PROG] = pci->prog_if;
     57     pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
     58     s->irq = pci_allocate_irq(&pci->dev);
     59 
     60     memory_region_init_io(&s->io, OBJECT(pci), &serial_io_ops, s, "serial", 8);
     61     pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
     62 }
     63 
     64 static void serial_pci_exit(PCIDevice *dev)
     65 {
     66     PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
     67     SerialState *s = &pci->state;
     68 
     69     qdev_unrealize(DEVICE(s));
     70     qemu_free_irq(s->irq);
     71 }
     72 
     73 static const VMStateDescription vmstate_pci_serial = {
     74     .name = "pci-serial",
     75     .version_id = 1,
     76     .minimum_version_id = 1,
     77     .fields = (VMStateField[]) {
     78         VMSTATE_PCI_DEVICE(dev, PCISerialState),
     79         VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState),
     80         VMSTATE_END_OF_LIST()
     81     }
     82 };
     83 
     84 static Property serial_pci_properties[] = {
     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     device_class_set_props(dc, serial_pci_properties);
    101     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
    102 }
    103 
    104 static void serial_pci_init(Object *o)
    105 {
    106     PCISerialState *ps = PCI_SERIAL(o);
    107 
    108     object_initialize_child(o, "serial", &ps->state, TYPE_SERIAL);
    109 
    110     qdev_alias_all_properties(DEVICE(&ps->state), o);
    111 }
    112 
    113 static const TypeInfo serial_pci_info = {
    114     .name          = TYPE_PCI_SERIAL,
    115     .parent        = TYPE_PCI_DEVICE,
    116     .instance_size = sizeof(PCISerialState),
    117     .instance_init = serial_pci_init,
    118     .class_init    = serial_pci_class_initfn,
    119     .interfaces = (InterfaceInfo[]) {
    120         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
    121         { },
    122     },
    123 };
    124 
    125 static void serial_pci_register_types(void)
    126 {
    127     type_register_static(&serial_pci_info);
    128 }
    129 
    130 type_init(serial_pci_register_types)