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 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.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 typedef struct I82378State I82378State; 31 DECLARE_INSTANCE_CHECKER(I82378State, I82378, 32 TYPE_I82378) 33 34 struct I82378State { 35 PCIDevice parent_obj; 36 37 qemu_irq out[2]; 38 qemu_irq *i8259; 39 MemoryRegion io; 40 }; 41 42 static const VMStateDescription vmstate_i82378 = { 43 .name = "pci-i82378", 44 .version_id = 0, 45 .minimum_version_id = 0, 46 .fields = (VMStateField[]) { 47 VMSTATE_PCI_DEVICE(parent_obj, I82378State), 48 VMSTATE_END_OF_LIST() 49 }, 50 }; 51 52 static void i82378_request_out0_irq(void *opaque, int irq, int level) 53 { 54 I82378State *s = opaque; 55 qemu_set_irq(s->out[0], level); 56 } 57 58 static void i82378_request_pic_irq(void *opaque, int irq, int level) 59 { 60 DeviceState *dev = opaque; 61 I82378State *s = I82378(dev); 62 63 qemu_set_irq(s->i8259[irq], level); 64 } 65 66 static void i82378_realize(PCIDevice *pci, Error **errp) 67 { 68 DeviceState *dev = DEVICE(pci); 69 I82378State *s = I82378(dev); 70 uint8_t *pci_conf; 71 ISABus *isabus; 72 ISADevice *pit; 73 74 pci_conf = pci->config; 75 pci_set_word(pci_conf + PCI_COMMAND, 76 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 77 pci_set_word(pci_conf + PCI_STATUS, 78 PCI_STATUS_DEVSEL_MEDIUM); 79 80 pci_config_set_interrupt_pin(pci_conf, 1); /* interrupt pin 0 */ 81 82 isabus = isa_bus_new(dev, get_system_memory(), 83 pci_address_space_io(pci), errp); 84 if (!isabus) { 85 return; 86 } 87 88 /* This device has: 89 2 82C59 (irq) 90 1 82C54 (pit) 91 2 82C37 (dma) 92 NMI 93 Utility Bus Support Registers 94 95 All devices accept byte access only, except timer 96 */ 97 98 /* 2 82C59 (irq) */ 99 s->i8259 = i8259_init(isabus, 100 qemu_allocate_irq(i82378_request_out0_irq, s, 0)); 101 isa_bus_irqs(isabus, s->i8259); 102 103 /* 1 82C54 (pit) */ 104 pit = i8254_pit_init(isabus, 0x40, 0, NULL); 105 106 /* speaker */ 107 pcspk_init(isa_new(TYPE_PC_SPEAKER), isabus, pit); 108 109 /* 2 82C37 (dma) */ 110 isa_create_simple(isabus, "i82374"); 111 } 112 113 static void i82378_init(Object *obj) 114 { 115 DeviceState *dev = DEVICE(obj); 116 I82378State *s = I82378(obj); 117 118 qdev_init_gpio_out(dev, s->out, 1); 119 qdev_init_gpio_in(dev, i82378_request_pic_irq, 16); 120 } 121 122 static void i82378_class_init(ObjectClass *klass, void *data) 123 { 124 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 125 DeviceClass *dc = DEVICE_CLASS(klass); 126 127 k->realize = i82378_realize; 128 k->vendor_id = PCI_VENDOR_ID_INTEL; 129 k->device_id = PCI_DEVICE_ID_INTEL_82378; 130 k->revision = 0x03; 131 k->class_id = PCI_CLASS_BRIDGE_ISA; 132 dc->vmsd = &vmstate_i82378; 133 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 134 } 135 136 static const TypeInfo i82378_type_info = { 137 .name = TYPE_I82378, 138 .parent = TYPE_PCI_DEVICE, 139 .instance_size = sizeof(I82378State), 140 .instance_init = i82378_init, 141 .class_init = i82378_class_init, 142 .interfaces = (InterfaceInfo[]) { 143 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 144 { }, 145 }, 146 }; 147 148 static void i82378_register_types(void) 149 { 150 type_register_static(&i82378_type_info); 151 } 152 153 type_init(i82378_register_types) 154