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 is based on acpi.c, but heavily rewritten. 10 * 11 * This library is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU Lesser General Public 13 * License version 2 as published by the Free Software Foundation. 14 * 15 * This library is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * Lesser General Public License for more details. 19 * 20 * You should have received a copy of the GNU Lesser General Public 21 * License along with this library; if not, see <http://www.gnu.org/licenses/> 22 * 23 * Contributions after 2012-01-13 are licensed under the terms of the 24 * GNU GPL, version 2 or (at your option) any later version. 25 * 26 */ 27 #include "hw/hw.h" 28 #include "hw/i386/pc.h" 29 #include "hw/i2c/pm_smbus.h" 30 #include "hw/pci/pci.h" 31 #include "sysemu/sysemu.h" 32 #include "hw/i2c/i2c.h" 33 #include "hw/i2c/smbus.h" 34 35 #include "hw/i386/ich9.h" 36 37 #define TYPE_ICH9_SMB_DEVICE "ICH9 SMB" 38 #define ICH9_SMB_DEVICE(obj) \ 39 OBJECT_CHECK(ICH9SMBState, (obj), TYPE_ICH9_SMB_DEVICE) 40 41 typedef struct ICH9SMBState { 42 PCIDevice dev; 43 44 PMSMBus smb; 45 } ICH9SMBState; 46 47 static const VMStateDescription vmstate_ich9_smbus = { 48 .name = "ich9_smb", 49 .version_id = 1, 50 .minimum_version_id = 1, 51 .minimum_version_id_old = 1, 52 .fields = (VMStateField[]) { 53 VMSTATE_PCI_DEVICE(dev, struct ICH9SMBState), 54 VMSTATE_END_OF_LIST() 55 } 56 }; 57 58 static void ich9_smbus_write_config(PCIDevice *d, uint32_t address, 59 uint32_t val, int len) 60 { 61 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 62 63 pci_default_write_config(d, address, val, len); 64 if (range_covers_byte(address, len, ICH9_SMB_HOSTC)) { 65 uint8_t hostc = s->dev.config[ICH9_SMB_HOSTC]; 66 if ((hostc & ICH9_SMB_HOSTC_HST_EN) && 67 !(hostc & ICH9_SMB_HOSTC_I2C_EN)) { 68 memory_region_set_enabled(&s->smb.io, true); 69 } else { 70 memory_region_set_enabled(&s->smb.io, false); 71 } 72 } 73 } 74 75 static int ich9_smbus_initfn(PCIDevice *d) 76 { 77 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 78 79 /* TODO? D31IP.SMIP in chipset configuration space */ 80 pci_config_set_interrupt_pin(d->config, 0x01); /* interrupt pin 1 */ 81 82 pci_set_byte(d->config + ICH9_SMB_HOSTC, 0); 83 /* TODO bar0, bar1: 64bit BAR support*/ 84 85 pm_smbus_init(&d->qdev, &s->smb); 86 pci_register_bar(d, ICH9_SMB_SMB_BASE_BAR, PCI_BASE_ADDRESS_SPACE_IO, 87 &s->smb.io); 88 return 0; 89 } 90 91 static void ich9_smb_class_init(ObjectClass *klass, void *data) 92 { 93 DeviceClass *dc = DEVICE_CLASS(klass); 94 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 95 96 k->vendor_id = PCI_VENDOR_ID_INTEL; 97 k->device_id = PCI_DEVICE_ID_INTEL_ICH9_6; 98 k->revision = ICH9_A2_SMB_REVISION; 99 k->class_id = PCI_CLASS_SERIAL_SMBUS; 100 dc->vmsd = &vmstate_ich9_smbus; 101 dc->desc = "ICH9 SMBUS Bridge"; 102 k->init = ich9_smbus_initfn; 103 k->config_write = ich9_smbus_write_config; 104 /* 105 * Reason: part of ICH9 southbridge, needs to be wired up by 106 * pc_q35_init() 107 */ 108 dc->cannot_instantiate_with_device_add_yet = true; 109 } 110 111 I2CBus *ich9_smb_init(PCIBus *bus, int devfn, uint32_t smb_io_base) 112 { 113 PCIDevice *d = 114 pci_create_simple_multifunction(bus, devfn, true, TYPE_ICH9_SMB_DEVICE); 115 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 116 return s->smb.smbus; 117 } 118 119 static const TypeInfo ich9_smb_info = { 120 .name = TYPE_ICH9_SMB_DEVICE, 121 .parent = TYPE_PCI_DEVICE, 122 .instance_size = sizeof(ICH9SMBState), 123 .class_init = ich9_smb_class_init, 124 }; 125 126 static void ich9_smb_register(void) 127 { 128 type_register_static(&ich9_smb_info); 129 } 130 131 type_init(ich9_smb_register); 132