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 }; 38 39 static const VMStateDescription vmstate_i82378 = { 40 .name = "pci-i82378", 41 .version_id = 0, 42 .minimum_version_id = 0, 43 .fields = (VMStateField[]) { 44 VMSTATE_PCI_DEVICE(parent_obj, I82378State), 45 VMSTATE_END_OF_LIST() 46 }, 47 }; 48 49 static void i82378_request_out0_irq(void *opaque, int irq, int level) 50 { 51 I82378State *s = opaque; 52 qemu_set_irq(s->cpu_intr, level); 53 } 54 55 static void i82378_request_pic_irq(void *opaque, int irq, int level) 56 { 57 DeviceState *dev = opaque; 58 I82378State *s = I82378(dev); 59 60 qemu_set_irq(s->isa_irqs_in[irq], level); 61 } 62 63 static void i82378_realize(PCIDevice *pci, Error **errp) 64 { 65 DeviceState *dev = DEVICE(pci); 66 I82378State *s = I82378(dev); 67 uint8_t *pci_conf; 68 ISABus *isabus; 69 ISADevice *pit; 70 ISADevice *pcspk; 71 72 pci_conf = pci->config; 73 pci_set_word(pci_conf + PCI_COMMAND, 74 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 75 pci_set_word(pci_conf + PCI_STATUS, 76 PCI_STATUS_DEVSEL_MEDIUM); 77 78 pci_config_set_interrupt_pin(pci_conf, 1); /* interrupt pin 0 */ 79 80 isabus = isa_bus_new(dev, get_system_memory(), 81 pci_address_space_io(pci), errp); 82 if (!isabus) { 83 return; 84 } 85 86 /* This device has: 87 2 82C59 (irq) 88 1 82C54 (pit) 89 2 82C37 (dma) 90 NMI 91 Utility Bus Support Registers 92 93 All devices accept byte access only, except timer 94 */ 95 96 /* 2 82C59 (irq) */ 97 s->isa_irqs_in = i8259_init(isabus, 98 qemu_allocate_irq(i82378_request_out0_irq, 99 s, 0)); 100 isa_bus_register_input_irqs(isabus, s->isa_irqs_in); 101 102 /* 1 82C54 (pit) */ 103 pit = i8254_pit_init(isabus, 0x40, 0, NULL); 104 105 /* speaker */ 106 pcspk = isa_new(TYPE_PC_SPEAKER); 107 object_property_set_link(OBJECT(pcspk), "pit", OBJECT(pit), &error_fatal); 108 if (!isa_realize_and_unref(pcspk, isabus, errp)) { 109 return; 110 } 111 112 /* 2 82C37 (dma) */ 113 isa_create_simple(isabus, "i82374"); 114 } 115 116 static void i82378_init(Object *obj) 117 { 118 DeviceState *dev = DEVICE(obj); 119 I82378State *s = I82378(obj); 120 121 qdev_init_gpio_out(dev, &s->cpu_intr, 1); 122 qdev_init_gpio_in(dev, i82378_request_pic_irq, 16); 123 } 124 125 static void i82378_class_init(ObjectClass *klass, void *data) 126 { 127 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 128 DeviceClass *dc = DEVICE_CLASS(klass); 129 130 k->realize = i82378_realize; 131 k->vendor_id = PCI_VENDOR_ID_INTEL; 132 k->device_id = PCI_DEVICE_ID_INTEL_82378; 133 k->revision = 0x03; 134 k->class_id = PCI_CLASS_BRIDGE_ISA; 135 dc->vmsd = &vmstate_i82378; 136 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 137 } 138 139 static const TypeInfo i82378_type_info = { 140 .name = TYPE_I82378, 141 .parent = TYPE_PCI_DEVICE, 142 .instance_size = sizeof(I82378State), 143 .instance_init = i82378_init, 144 .class_init = i82378_class_init, 145 .interfaces = (InterfaceInfo[]) { 146 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 147 { }, 148 }, 149 }; 150 151 static void i82378_register_types(void) 152 { 153 type_register_static(&i82378_type_info); 154 } 155 156 type_init(i82378_register_types) 157