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 #include "qemu/osdep.h" 23 #include "hw/hw.h" 24 #include "hw/i2c/pm_smbus.h" 25 #include "hw/pci/pci.h" 26 #include "sysemu/sysemu.h" 27 28 #include "hw/i386/ich9.h" 29 30 #define ICH9_SMB_DEVICE(obj) \ 31 OBJECT_CHECK(ICH9SMBState, (obj), TYPE_ICH9_SMB_DEVICE) 32 33 typedef struct ICH9SMBState { 34 PCIDevice dev; 35 36 bool irq_enabled; 37 38 PMSMBus smb; 39 } ICH9SMBState; 40 41 static bool ich9_vmstate_need_smbus(void *opaque, int version_id) 42 { 43 return pm_smbus_vmstate_needed(); 44 } 45 46 static const VMStateDescription vmstate_ich9_smbus = { 47 .name = "ich9_smb", 48 .version_id = 1, 49 .minimum_version_id = 1, 50 .fields = (VMStateField[]) { 51 VMSTATE_PCI_DEVICE(dev, ICH9SMBState), 52 VMSTATE_BOOL_TEST(irq_enabled, ICH9SMBState, ich9_vmstate_need_smbus), 53 VMSTATE_STRUCT_TEST(smb, ICH9SMBState, ich9_vmstate_need_smbus, 1, 54 pmsmb_vmstate, PMSMBus), 55 VMSTATE_END_OF_LIST() 56 } 57 }; 58 59 static void ich9_smbus_write_config(PCIDevice *d, uint32_t address, 60 uint32_t val, int len) 61 { 62 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 63 64 pci_default_write_config(d, address, val, len); 65 if (range_covers_byte(address, len, ICH9_SMB_HOSTC)) { 66 uint8_t hostc = s->dev.config[ICH9_SMB_HOSTC]; 67 if (hostc & ICH9_SMB_HOSTC_HST_EN) { 68 memory_region_set_enabled(&s->smb.io, true); 69 } else { 70 memory_region_set_enabled(&s->smb.io, false); 71 } 72 s->smb.i2c_enable = (hostc & ICH9_SMB_HOSTC_I2C_EN) != 0; 73 if (hostc & ICH9_SMB_HOSTC_SSRESET) { 74 s->smb.reset(&s->smb); 75 s->dev.config[ICH9_SMB_HOSTC] &= ~ICH9_SMB_HOSTC_SSRESET; 76 } 77 } 78 } 79 80 static void ich9_smbus_realize(PCIDevice *d, Error **errp) 81 { 82 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 83 84 /* TODO? D31IP.SMIP in chipset configuration space */ 85 pci_config_set_interrupt_pin(d->config, 0x01); /* interrupt pin 1 */ 86 87 pci_set_byte(d->config + ICH9_SMB_HOSTC, 0); 88 /* TODO bar0, bar1: 64bit BAR support*/ 89 90 pm_smbus_init(&d->qdev, &s->smb, false); 91 pci_register_bar(d, ICH9_SMB_SMB_BASE_BAR, PCI_BASE_ADDRESS_SPACE_IO, 92 &s->smb.io); 93 } 94 95 static void ich9_smb_class_init(ObjectClass *klass, void *data) 96 { 97 DeviceClass *dc = DEVICE_CLASS(klass); 98 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 99 100 k->vendor_id = PCI_VENDOR_ID_INTEL; 101 k->device_id = PCI_DEVICE_ID_INTEL_ICH9_6; 102 k->revision = ICH9_A2_SMB_REVISION; 103 k->class_id = PCI_CLASS_SERIAL_SMBUS; 104 dc->vmsd = &vmstate_ich9_smbus; 105 dc->desc = "ICH9 SMBUS Bridge"; 106 k->realize = ich9_smbus_realize; 107 k->config_write = ich9_smbus_write_config; 108 /* 109 * Reason: part of ICH9 southbridge, needs to be wired up by 110 * pc_q35_init() 111 */ 112 dc->user_creatable = false; 113 } 114 115 static void ich9_smb_set_irq(PMSMBus *pmsmb, bool enabled) 116 { 117 ICH9SMBState *s = pmsmb->opaque; 118 119 if (enabled == s->irq_enabled) { 120 return; 121 } 122 123 s->irq_enabled = enabled; 124 pci_set_irq(&s->dev, enabled); 125 } 126 127 I2CBus *ich9_smb_init(PCIBus *bus, int devfn, uint32_t smb_io_base) 128 { 129 PCIDevice *d = 130 pci_create_simple_multifunction(bus, devfn, true, TYPE_ICH9_SMB_DEVICE); 131 ICH9SMBState *s = ICH9_SMB_DEVICE(d); 132 s->smb.set_irq = ich9_smb_set_irq; 133 s->smb.opaque = s; 134 return s->smb.smbus; 135 } 136 137 static const TypeInfo ich9_smb_info = { 138 .name = TYPE_ICH9_SMB_DEVICE, 139 .parent = TYPE_PCI_DEVICE, 140 .instance_size = sizeof(ICH9SMBState), 141 .class_init = ich9_smb_class_init, 142 .interfaces = (InterfaceInfo[]) { 143 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 144 { }, 145 }, 146 }; 147 148 static void ich9_smb_register(void) 149 { 150 type_register_static(&ich9_smb_info); 151 } 152 153 type_init(ich9_smb_register); 154