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 51 if (!qdev_realize(DEVICE(s), NULL, errp)) { 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 qdev_unrealize(DEVICE(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 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 } 110 111 static const TypeInfo serial_pci_info = { 112 .name = TYPE_PCI_SERIAL, 113 .parent = TYPE_PCI_DEVICE, 114 .instance_size = sizeof(PCISerialState), 115 .instance_init = serial_pci_init, 116 .class_init = serial_pci_class_initfn, 117 .interfaces = (InterfaceInfo[]) { 118 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 119 { }, 120 }, 121 }; 122 123 static void serial_pci_register_types(void) 124 { 125 type_register_static(&serial_pci_info); 126 } 127 128 type_init(serial_pci_register_types) 129