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 "qemu/osdep.h" 28 #include "hw/hw.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 ICH9_SMB_DEVICE(obj) \ 38 OBJECT_CHECK(ICH9SMBState, (obj), TYPE_ICH9_SMB_DEVICE) 39 40 typedef struct ICH9SMBState { 41 PCIDevice dev; 42 43 bool irq_enabled; 44 45 PMSMBus smb; 46 } ICH9SMBState; 47 48 static const VMStateDescription vmstate_ich9_smbus = { 49 .name = "ich9_smb", 50 .version_id = 1, 51 .minimum_version_id = 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 memory_region_set_enabled(&s->smb.io, true); 68 } else { 69 memory_region_set_enabled(&s->smb.io, false); 70 } 71 s->smb.i2c_enable = (hostc & ICH9_SMB_HOSTC_I2C_EN) != 0; 72 if (hostc & ICH9_SMB_HOSTC_SSRESET) { 73 s->smb.reset(&s->smb); 74 s->dev.config[ICH9_SMB_HOSTC] &= ~ICH9_SMB_HOSTC_SSRESET; 75 } 76 } 77 } 78 79 static void ich9_smbus_realize(PCIDevice *d, Error **errp) 80 { 81 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 82 83 /* TODO? D31IP.SMIP in chipset configuration space */ 84 pci_config_set_interrupt_pin(d->config, 0x01); /* interrupt pin 1 */ 85 86 pci_set_byte(d->config + ICH9_SMB_HOSTC, 0); 87 /* TODO bar0, bar1: 64bit BAR support*/ 88 89 pm_smbus_init(&d->qdev, &s->smb, false); 90 pci_register_bar(d, ICH9_SMB_SMB_BASE_BAR, PCI_BASE_ADDRESS_SPACE_IO, 91 &s->smb.io); 92 } 93 94 static void ich9_smb_class_init(ObjectClass *klass, void *data) 95 { 96 DeviceClass *dc = DEVICE_CLASS(klass); 97 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 98 99 k->vendor_id = PCI_VENDOR_ID_INTEL; 100 k->device_id = PCI_DEVICE_ID_INTEL_ICH9_6; 101 k->revision = ICH9_A2_SMB_REVISION; 102 k->class_id = PCI_CLASS_SERIAL_SMBUS; 103 dc->vmsd = &vmstate_ich9_smbus; 104 dc->desc = "ICH9 SMBUS Bridge"; 105 k->realize = ich9_smbus_realize; 106 k->config_write = ich9_smbus_write_config; 107 /* 108 * Reason: part of ICH9 southbridge, needs to be wired up by 109 * pc_q35_init() 110 */ 111 dc->user_creatable = false; 112 } 113 114 static void ich9_smb_set_irq(PMSMBus *pmsmb, bool enabled) 115 { 116 ICH9SMBState *s = pmsmb->opaque; 117 118 if (enabled == s->irq_enabled) { 119 return; 120 } 121 122 s->irq_enabled = enabled; 123 pci_set_irq(&s->dev, enabled); 124 } 125 126 I2CBus *ich9_smb_init(PCIBus *bus, int devfn, uint32_t smb_io_base) 127 { 128 PCIDevice *d = 129 pci_create_simple_multifunction(bus, devfn, true, TYPE_ICH9_SMB_DEVICE); 130 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 131 s->smb.set_irq = ich9_smb_set_irq; 132 s->smb.opaque = s; 133 return s->smb.smbus; 134 } 135 136 static const TypeInfo ich9_smb_info = { 137 .name = TYPE_ICH9_SMB_DEVICE, 138 .parent = TYPE_PCI_DEVICE, 139 .instance_size = sizeof(ICH9SMBState), 140 .class_init = ich9_smb_class_init, 141 .interfaces = (InterfaceInfo[]) { 142 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 143 { }, 144 }, 145 }; 146 147 static void ich9_smb_register(void) 148 { 149 type_register_static(&ich9_smb_info); 150 } 151 152 type_init(ich9_smb_register); 153