4 * Copyright (c) 2006 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License version 2 as published by the Free Software Foundation.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, see <http://www.gnu.org/licenses/>
19 * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
20 * VA Linux Systems Japan K.K.
21 * Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
23 * This is based on acpi.c, but heavily rewritten.
35 #define TYPE_ICH9_SMB_DEVICE "ICH9 SMB"
36 #define ICH9_SMB_DEVICE(obj) \
37 OBJECT_CHECK(ICH9SMBState, (obj), TYPE_ICH9_SMB_DEVICE)
39 typedef struct ICH9SMBState
{
45 static const VMStateDescription vmstate_ich9_smbus
= {
48 .minimum_version_id
= 1,
49 .minimum_version_id_old
= 1,
50 .fields
= (VMStateField
[]) {
51 VMSTATE_PCI_DEVICE(dev
, struct ICH9SMBState
),
56 static void ich9_smbus_write_config(PCIDevice
*d
, uint32_t address
,
57 uint32_t val
, int len
)
59 ICH9SMBState
*s
= ICH9_SMB_DEVICE(d
);
61 pci_default_write_config(d
, address
, val
, len
);
62 if (range_covers_byte(address
, len
, ICH9_SMB_HOSTC
)) {
63 uint8_t hostc
= s
->dev
.config
[ICH9_SMB_HOSTC
];
64 if ((hostc
& ICH9_SMB_HOSTC_HST_EN
) &&
65 !(hostc
& ICH9_SMB_HOSTC_I2C_EN
)) {
66 memory_region_set_enabled(&s
->smb
.io
, true);
68 memory_region_set_enabled(&s
->smb
.io
, false);
73 static int ich9_smbus_initfn(PCIDevice
*d
)
75 ICH9SMBState
*s
= ICH9_SMB_DEVICE(d
);
77 /* TODO? D31IP.SMIP in chipset configuration space */
78 pci_config_set_interrupt_pin(d
->config
, 0x01); /* interrupt pin 1 */
80 pci_set_byte(d
->config
+ ICH9_SMB_HOSTC
, 0);
81 /* TODO bar0, bar1: 64bit BAR support*/
83 pm_smbus_init(&d
->qdev
, &s
->smb
);
84 pci_register_bar(d
, ICH9_SMB_SMB_BASE_BAR
, PCI_BASE_ADDRESS_SPACE_IO
,
89 static void ich9_smb_class_init(ObjectClass
*klass
, void *data
)
91 DeviceClass
*dc
= DEVICE_CLASS(klass
);
92 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
94 k
->vendor_id
= PCI_VENDOR_ID_INTEL
;
95 k
->device_id
= PCI_DEVICE_ID_INTEL_ICH9_6
;
96 k
->revision
= ICH9_A2_SMB_REVISION
;
97 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
;
105 i2c_bus
*ich9_smb_init(PCIBus
*bus
, int devfn
, uint32_t smb_io_base
)
108 pci_create_simple_multifunction(bus
, devfn
, true, TYPE_ICH9_SMB_DEVICE
);
109 ICH9SMBState
*s
= ICH9_SMB_DEVICE(d
);
113 static const TypeInfo ich9_smb_info
= {
114 .name
= TYPE_ICH9_SMB_DEVICE
,
115 .parent
= TYPE_PCI_DEVICE
,
116 .instance_size
= sizeof(ICH9SMBState
),
117 .class_init
= ich9_smb_class_init
,
120 static void ich9_smb_register(void)
122 type_register_static(&ich9_smb_info
);
125 type_init(ich9_smb_register
);