1 /* 2 * QEMU Intel i82378 emulation (PCI to ISA bridge) 3 * 4 * Copyright (c) 2010-2011 Hervé Poussineau 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "hw/pci/pci_device.h" 22 #include "hw/irq.h" 23 #include "hw/intc/i8259.h" 24 #include "hw/timer/i8254.h" 25 #include "migration/vmstate.h" 26 #include "hw/audio/pcspk.h" 27 #include "qom/object.h" 28 29 #define TYPE_I82378 "i82378" 30 OBJECT_DECLARE_SIMPLE_TYPE(I82378State, I82378) 31 32 struct I82378State { 33 PCIDevice parent_obj; 34 35 qemu_irq cpu_intr; 36 qemu_irq *isa_irqs_in; 37 MemoryRegion io; 38 }; 39 40 static const VMStateDescription vmstate_i82378 = { 41 .name = "pci-i82378", 42 .version_id = 0, 43 .minimum_version_id = 0, 44 .fields = (VMStateField[]) { 45 VMSTATE_PCI_DEVICE(parent_obj, I82378State), 46 VMSTATE_END_OF_LIST() 47 }, 48 }; 49 50 static void i82378_request_pic_irq(void *opaque, int irq, int level) 51 { 52 DeviceState *dev = opaque; 53 I82378State *s = I82378(dev); 54 55 qemu_set_irq(s->isa_irqs_in[irq], level); 56 } 57 58 static void i82378_realize(PCIDevice *pci, Error **errp) 59 { 60 DeviceState *dev = DEVICE(pci); 61 I82378State *s = I82378(dev); 62 uint8_t *pci_conf; 63 ISABus *isabus; 64 ISADevice *pit; 65 66 pci_conf = pci->config; 67 pci_set_word(pci_conf + PCI_COMMAND, 68 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 69 pci_set_word(pci_conf + PCI_STATUS, 70 PCI_STATUS_DEVSEL_MEDIUM); 71 72 pci_config_set_interrupt_pin(pci_conf, 1); /* interrupt pin 0 */ 73 74 isabus = isa_bus_new(dev, get_system_memory(), 75 pci_address_space_io(pci), errp); 76 if (!isabus) { 77 return; 78 } 79 80 /* This device has: 81 2 82C59 (irq) 82 1 82C54 (pit) 83 2 82C37 (dma) 84 NMI 85 Utility Bus Support Registers 86 87 All devices accept byte access only, except timer 88 */ 89 90 /* 2 82C59 (irq) */ 91 s->isa_irqs_in = i8259_init(isabus, s->cpu_intr); 92 isa_bus_register_input_irqs(isabus, s->isa_irqs_in); 93 94 /* 1 82C54 (pit) */ 95 pit = i8254_pit_init(isabus, 0x40, 0, NULL); 96 97 /* speaker */ 98 pcspk_init(isa_new(TYPE_PC_SPEAKER), isabus, pit); 99 100 /* 2 82C37 (dma) */ 101 isa_create_simple(isabus, "i82374"); 102 } 103 104 static void i82378_init(Object *obj) 105 { 106 DeviceState *dev = DEVICE(obj); 107 I82378State *s = I82378(obj); 108 109 qdev_init_gpio_out(dev, &s->cpu_intr, 1); 110 qdev_init_gpio_in(dev, i82378_request_pic_irq, 16); 111 } 112 113 static void i82378_class_init(ObjectClass *klass, void *data) 114 { 115 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 116 DeviceClass *dc = DEVICE_CLASS(klass); 117 118 k->realize = i82378_realize; 119 k->vendor_id = PCI_VENDOR_ID_INTEL; 120 k->device_id = PCI_DEVICE_ID_INTEL_82378; 121 k->revision = 0x03; 122 k->class_id = PCI_CLASS_BRIDGE_ISA; 123 dc->vmsd = &vmstate_i82378; 124 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 125 } 126 127 static const TypeInfo i82378_type_info = { 128 .name = TYPE_I82378, 129 .parent = TYPE_PCI_DEVICE, 130 .instance_size = sizeof(I82378State), 131 .instance_init = i82378_init, 132 .class_init = i82378_class_init, 133 .interfaces = (InterfaceInfo[]) { 134 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 135 { }, 136 }, 137 }; 138 139 static void i82378_register_types(void) 140 { 141 type_register_static(&i82378_type_info); 142 } 143 144 type_init(i82378_register_types) 145