1 /* 2 * ACPI implementation 3 * 4 * Copyright (c) 2006 Fabrice Bellard 5 * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp> 6 * VA Linux Systems Japan K.K. 7 * Copyright (C) 2012 Jason Baron <jbaron@redhat.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, see <http://www.gnu.org/licenses/> 21 */ 22 23 #include "qemu/osdep.h" 24 #include "qemu/range.h" 25 #include "hw/i2c/pm_smbus.h" 26 #include "hw/pci/pci.h" 27 #include "migration/vmstate.h" 28 #include "qemu/module.h" 29 30 #include "hw/i386/ich9.h" 31 #include "qom/object.h" 32 #include "hw/acpi/acpi_aml_interface.h" 33 34 OBJECT_DECLARE_SIMPLE_TYPE(ICH9SMBState, ICH9_SMB_DEVICE) 35 36 struct ICH9SMBState { 37 PCIDevice dev; 38 39 bool irq_enabled; 40 41 PMSMBus smb; 42 }; 43 44 static bool ich9_vmstate_need_smbus(void *opaque, int version_id) 45 { 46 return pm_smbus_vmstate_needed(); 47 } 48 49 static const VMStateDescription vmstate_ich9_smbus = { 50 .name = "ich9_smb", 51 .version_id = 1, 52 .minimum_version_id = 1, 53 .fields = (VMStateField[]) { 54 VMSTATE_PCI_DEVICE(dev, ICH9SMBState), 55 VMSTATE_BOOL_TEST(irq_enabled, ICH9SMBState, ich9_vmstate_need_smbus), 56 VMSTATE_STRUCT_TEST(smb, ICH9SMBState, ich9_vmstate_need_smbus, 1, 57 pmsmb_vmstate, PMSMBus), 58 VMSTATE_END_OF_LIST() 59 } 60 }; 61 62 static void ich9_smbus_write_config(PCIDevice *d, uint32_t address, 63 uint32_t val, int len) 64 { 65 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 66 67 pci_default_write_config(d, address, val, len); 68 if (range_covers_byte(address, len, ICH9_SMB_HOSTC)) { 69 uint8_t hostc = s->dev.config[ICH9_SMB_HOSTC]; 70 if (hostc & ICH9_SMB_HOSTC_HST_EN) { 71 memory_region_set_enabled(&s->smb.io, true); 72 } else { 73 memory_region_set_enabled(&s->smb.io, false); 74 } 75 s->smb.i2c_enable = (hostc & ICH9_SMB_HOSTC_I2C_EN) != 0; 76 if (hostc & ICH9_SMB_HOSTC_SSRESET) { 77 s->smb.reset(&s->smb); 78 s->dev.config[ICH9_SMB_HOSTC] &= ~ICH9_SMB_HOSTC_SSRESET; 79 } 80 } 81 } 82 83 static void ich9_smbus_realize(PCIDevice *d, Error **errp) 84 { 85 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 86 87 /* TODO? D31IP.SMIP in chipset configuration space */ 88 pci_config_set_interrupt_pin(d->config, 0x01); /* interrupt pin 1 */ 89 90 pci_set_byte(d->config + ICH9_SMB_HOSTC, 0); 91 /* TODO bar0, bar1: 64bit BAR support*/ 92 93 pm_smbus_init(&d->qdev, &s->smb, false); 94 pci_register_bar(d, ICH9_SMB_SMB_BASE_BAR, PCI_BASE_ADDRESS_SPACE_IO, 95 &s->smb.io); 96 } 97 98 static void build_ich9_smb_aml(AcpiDevAmlIf *adev, Aml *scope) 99 { 100 BusChild *kid; 101 ICH9SMBState *s = ICH9_SMB_DEVICE(adev); 102 BusState *bus = BUS(s->smb.smbus); 103 104 QTAILQ_FOREACH(kid, &bus->children, sibling) { 105 call_dev_aml_func(DEVICE(kid->child), scope); 106 } 107 } 108 109 static void ich9_smb_class_init(ObjectClass *klass, void *data) 110 { 111 DeviceClass *dc = DEVICE_CLASS(klass); 112 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 113 AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass); 114 115 k->vendor_id = PCI_VENDOR_ID_INTEL; 116 k->device_id = PCI_DEVICE_ID_INTEL_ICH9_6; 117 k->revision = ICH9_A2_SMB_REVISION; 118 k->class_id = PCI_CLASS_SERIAL_SMBUS; 119 dc->vmsd = &vmstate_ich9_smbus; 120 dc->desc = "ICH9 SMBUS Bridge"; 121 k->realize = ich9_smbus_realize; 122 k->config_write = ich9_smbus_write_config; 123 /* 124 * Reason: part of ICH9 southbridge, needs to be wired up by 125 * pc_q35_init() 126 */ 127 dc->user_creatable = false; 128 adevc->build_dev_aml = build_ich9_smb_aml; 129 } 130 131 static void ich9_smb_set_irq(PMSMBus *pmsmb, bool enabled) 132 { 133 ICH9SMBState *s = pmsmb->opaque; 134 135 if (enabled == s->irq_enabled) { 136 return; 137 } 138 139 s->irq_enabled = enabled; 140 pci_set_irq(&s->dev, enabled); 141 } 142 143 I2CBus *ich9_smb_init(PCIBus *bus, int devfn, uint32_t smb_io_base) 144 { 145 PCIDevice *d = 146 pci_create_simple_multifunction(bus, devfn, true, TYPE_ICH9_SMB_DEVICE); 147 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 148 s->smb.set_irq = ich9_smb_set_irq; 149 s->smb.opaque = s; 150 return s->smb.smbus; 151 } 152 153 static const TypeInfo ich9_smb_info = { 154 .name = TYPE_ICH9_SMB_DEVICE, 155 .parent = TYPE_PCI_DEVICE, 156 .instance_size = sizeof(ICH9SMBState), 157 .class_init = ich9_smb_class_init, 158 .interfaces = (InterfaceInfo[]) { 159 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 160 { TYPE_ACPI_DEV_AML_IF }, 161 { }, 162 }, 163 }; 164 165 static void ich9_smb_register(void) 166 { 167 type_register_static(&ich9_smb_info); 168 } 169 170 type_init(ich9_smb_register); 171