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 qdev_realize(DEVICE(s), NULL, &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 qdev_unrealize(DEVICE(s)); 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, TYPE_SERIAL); 112 } 113 114 static const TypeInfo serial_pci_info = { 115 .name = TYPE_PCI_SERIAL, 116 .parent = TYPE_PCI_DEVICE, 117 .instance_size = sizeof(PCISerialState), 118 .instance_init = serial_pci_init, 119 .class_init = serial_pci_class_initfn, 120 .interfaces = (InterfaceInfo[]) { 121 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 122 { }, 123 }, 124 }; 125 126 static void serial_pci_register_types(void) 127 { 128 type_register_static(&serial_pci_info); 129 } 130 131 type_init(serial_pci_register_types) 132