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 .fields = (VMStateField[]) { 52 VMSTATE_PCI_DEVICE(dev, struct ICH9SMBState), 53 VMSTATE_END_OF_LIST() 54 } 55 }; 56 57 static void ich9_smbus_write_config(PCIDevice *d, uint32_t address, 58 uint32_t val, int len) 59 { 60 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 61 62 pci_default_write_config(d, address, val, len); 63 if (range_covers_byte(address, len, ICH9_SMB_HOSTC)) { 64 uint8_t hostc = s->dev.config[ICH9_SMB_HOSTC]; 65 if ((hostc & ICH9_SMB_HOSTC_HST_EN) && 66 !(hostc & ICH9_SMB_HOSTC_I2C_EN)) { 67 memory_region_set_enabled(&s->smb.io, true); 68 } else { 69 memory_region_set_enabled(&s->smb.io, false); 70 } 71 } 72 } 73 74 static int ich9_smbus_initfn(PCIDevice *d) 75 { 76 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 77 78 /* TODO? D31IP.SMIP in chipset configuration space */ 79 pci_config_set_interrupt_pin(d->config, 0x01); /* interrupt pin 1 */ 80 81 pci_set_byte(d->config + ICH9_SMB_HOSTC, 0); 82 /* TODO bar0, bar1: 64bit BAR support*/ 83 84 pm_smbus_init(&d->qdev, &s->smb); 85 pci_register_bar(d, ICH9_SMB_SMB_BASE_BAR, PCI_BASE_ADDRESS_SPACE_IO, 86 &s->smb.io); 87 return 0; 88 } 89 90 static void ich9_smb_class_init(ObjectClass *klass, void *data) 91 { 92 DeviceClass *dc = DEVICE_CLASS(klass); 93 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 94 95 k->vendor_id = PCI_VENDOR_ID_INTEL; 96 k->device_id = PCI_DEVICE_ID_INTEL_ICH9_6; 97 k->revision = ICH9_A2_SMB_REVISION; 98 k->class_id = PCI_CLASS_SERIAL_SMBUS; 99 dc->vmsd = &vmstate_ich9_smbus; 100 dc->desc = "ICH9 SMBUS Bridge"; 101 k->init = ich9_smbus_initfn; 102 k->config_write = ich9_smbus_write_config; 103 /* 104 * Reason: part of ICH9 southbridge, needs to be wired up by 105 * pc_q35_init() 106 */ 107 dc->cannot_instantiate_with_device_add_yet = true; 108 } 109 110 I2CBus *ich9_smb_init(PCIBus *bus, int devfn, uint32_t smb_io_base) 111 { 112 PCIDevice *d = 113 pci_create_simple_multifunction(bus, devfn, true, TYPE_ICH9_SMB_DEVICE); 114 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 115 return s->smb.smbus; 116 } 117 118 static const TypeInfo ich9_smb_info = { 119 .name = TYPE_ICH9_SMB_DEVICE, 120 .parent = TYPE_PCI_DEVICE, 121 .instance_size = sizeof(ICH9SMBState), 122 .class_init = ich9_smb_class_init, 123 }; 124 125 static void ich9_smb_register(void) 126 { 127 type_register_static(&ich9_smb_info); 128 } 129 130 type_init(ich9_smb_register); 131