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 33 typedef struct ICH9SMBState ICH9SMBState; 34 DECLARE_INSTANCE_CHECKER(ICH9SMBState, ICH9_SMB_DEVICE, 35 TYPE_ICH9_SMB_DEVICE) 36 37 struct ICH9SMBState { 38 PCIDevice dev; 39 40 bool irq_enabled; 41 42 PMSMBus smb; 43 }; 44 45 static bool ich9_vmstate_need_smbus(void *opaque, int version_id) 46 { 47 return pm_smbus_vmstate_needed(); 48 } 49 50 static const VMStateDescription vmstate_ich9_smbus = { 51 .name = "ich9_smb", 52 .version_id = 1, 53 .minimum_version_id = 1, 54 .fields = (VMStateField[]) { 55 VMSTATE_PCI_DEVICE(dev, ICH9SMBState), 56 VMSTATE_BOOL_TEST(irq_enabled, ICH9SMBState, ich9_vmstate_need_smbus), 57 VMSTATE_STRUCT_TEST(smb, ICH9SMBState, ich9_vmstate_need_smbus, 1, 58 pmsmb_vmstate, PMSMBus), 59 VMSTATE_END_OF_LIST() 60 } 61 }; 62 63 static void ich9_smbus_write_config(PCIDevice *d, uint32_t address, 64 uint32_t val, int len) 65 { 66 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 67 68 pci_default_write_config(d, address, val, len); 69 if (range_covers_byte(address, len, ICH9_SMB_HOSTC)) { 70 uint8_t hostc = s->dev.config[ICH9_SMB_HOSTC]; 71 if (hostc & ICH9_SMB_HOSTC_HST_EN) { 72 memory_region_set_enabled(&s->smb.io, true); 73 } else { 74 memory_region_set_enabled(&s->smb.io, false); 75 } 76 s->smb.i2c_enable = (hostc & ICH9_SMB_HOSTC_I2C_EN) != 0; 77 if (hostc & ICH9_SMB_HOSTC_SSRESET) { 78 s->smb.reset(&s->smb); 79 s->dev.config[ICH9_SMB_HOSTC] &= ~ICH9_SMB_HOSTC_SSRESET; 80 } 81 } 82 } 83 84 static void ich9_smbus_realize(PCIDevice *d, Error **errp) 85 { 86 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 87 88 /* TODO? D31IP.SMIP in chipset configuration space */ 89 pci_config_set_interrupt_pin(d->config, 0x01); /* interrupt pin 1 */ 90 91 pci_set_byte(d->config + ICH9_SMB_HOSTC, 0); 92 /* TODO bar0, bar1: 64bit BAR support*/ 93 94 pm_smbus_init(&d->qdev, &s->smb, false); 95 pci_register_bar(d, ICH9_SMB_SMB_BASE_BAR, PCI_BASE_ADDRESS_SPACE_IO, 96 &s->smb.io); 97 } 98 99 static void ich9_smb_class_init(ObjectClass *klass, void *data) 100 { 101 DeviceClass *dc = DEVICE_CLASS(klass); 102 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 103 104 k->vendor_id = PCI_VENDOR_ID_INTEL; 105 k->device_id = PCI_DEVICE_ID_INTEL_ICH9_6; 106 k->revision = ICH9_A2_SMB_REVISION; 107 k->class_id = PCI_CLASS_SERIAL_SMBUS; 108 dc->vmsd = &vmstate_ich9_smbus; 109 dc->desc = "ICH9 SMBUS Bridge"; 110 k->realize = ich9_smbus_realize; 111 k->config_write = ich9_smbus_write_config; 112 /* 113 * Reason: part of ICH9 southbridge, needs to be wired up by 114 * pc_q35_init() 115 */ 116 dc->user_creatable = false; 117 } 118 119 static void ich9_smb_set_irq(PMSMBus *pmsmb, bool enabled) 120 { 121 ICH9SMBState *s = pmsmb->opaque; 122 123 if (enabled == s->irq_enabled) { 124 return; 125 } 126 127 s->irq_enabled = enabled; 128 pci_set_irq(&s->dev, enabled); 129 } 130 131 I2CBus *ich9_smb_init(PCIBus *bus, int devfn, uint32_t smb_io_base) 132 { 133 PCIDevice *d = 134 pci_create_simple_multifunction(bus, devfn, true, TYPE_ICH9_SMB_DEVICE); 135 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 136 s->smb.set_irq = ich9_smb_set_irq; 137 s->smb.opaque = s; 138 return s->smb.smbus; 139 } 140 141 static const TypeInfo ich9_smb_info = { 142 .name = TYPE_ICH9_SMB_DEVICE, 143 .parent = TYPE_PCI_DEVICE, 144 .instance_size = sizeof(ICH9SMBState), 145 .class_init = ich9_smb_class_init, 146 .interfaces = (InterfaceInfo[]) { 147 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 148 { }, 149 }, 150 }; 151 152 static void ich9_smb_register(void) 153 { 154 type_register_static(&ich9_smb_info); 155 } 156 157 type_init(ich9_smb_register); 158