diff options
Diffstat (limited to 'src/hw/i2c/smbus_ich9.c')
| -rw-r--r-- | src/hw/i2c/smbus_ich9.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/hw/i2c/smbus_ich9.c b/src/hw/i2c/smbus_ich9.c new file mode 100644 index 0000000..91d4d32 --- /dev/null +++ b/src/hw/i2c/smbus_ich9.c @@ -0,0 +1,129 @@ +/* + * ACPI implementation + * + * Copyright (c) 2006 Fabrice Bellard + * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp> + * VA Linux Systems Japan K.K. + * Copyright (C) 2012 Jason Baron <jbaron@redhat.com> + * + * This is based on acpi.c, but heavily rewritten. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2 as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/> + * + * Contributions after 2012-01-13 are licensed under the terms of the + * GNU GPL, version 2 or (at your option) any later version. + * + */ +#include "hw/hw.h" +#include "hw/i386/pc.h" +#include "hw/i2c/pm_smbus.h" +#include "hw/pci/pci.h" +#include "sysemu/sysemu.h" +#include "hw/i2c/i2c.h" +#include "hw/i2c/smbus.h" + +#include "hw/i386/ich9.h" + +#define TYPE_ICH9_SMB_DEVICE "ICH9 SMB" +#define ICH9_SMB_DEVICE(obj) \ + OBJECT_CHECK(ICH9SMBState, (obj), TYPE_ICH9_SMB_DEVICE) + +typedef struct ICH9SMBState { + PCIDevice dev; + + PMSMBus smb; +} ICH9SMBState; + +static const VMStateDescription vmstate_ich9_smbus = { + .name = "ich9_smb", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_PCI_DEVICE(dev, struct ICH9SMBState), + VMSTATE_END_OF_LIST() + } +}; + +static void ich9_smbus_write_config(PCIDevice *d, uint32_t address, + uint32_t val, int len) +{ + ICH9SMBState *s = ICH9_SMB_DEVICE(d); + + pci_default_write_config(d, address, val, len); + if (range_covers_byte(address, len, ICH9_SMB_HOSTC)) { + uint8_t hostc = s->dev.config[ICH9_SMB_HOSTC]; + if ((hostc & ICH9_SMB_HOSTC_HST_EN) && + !(hostc & ICH9_SMB_HOSTC_I2C_EN)) { + memory_region_set_enabled(&s->smb.io, true); + } else { + memory_region_set_enabled(&s->smb.io, false); + } + } +} + +static void ich9_smbus_realize(PCIDevice *d, Error **errp) +{ + ICH9SMBState *s = ICH9_SMB_DEVICE(d); + + /* TODO? D31IP.SMIP in chipset configuration space */ + pci_config_set_interrupt_pin(d->config, 0x01); /* interrupt pin 1 */ + + pci_set_byte(d->config + ICH9_SMB_HOSTC, 0); + /* TODO bar0, bar1: 64bit BAR support*/ + + pm_smbus_init(&d->qdev, &s->smb); + pci_register_bar(d, ICH9_SMB_SMB_BASE_BAR, PCI_BASE_ADDRESS_SPACE_IO, + &s->smb.io); +} + +static void ich9_smb_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + + k->vendor_id = PCI_VENDOR_ID_INTEL; + k->device_id = PCI_DEVICE_ID_INTEL_ICH9_6; + k->revision = ICH9_A2_SMB_REVISION; + k->class_id = PCI_CLASS_SERIAL_SMBUS; + dc->vmsd = &vmstate_ich9_smbus; + dc->desc = "ICH9 SMBUS Bridge"; + k->realize = ich9_smbus_realize; + k->config_write = ich9_smbus_write_config; + /* + * Reason: part of ICH9 southbridge, needs to be wired up by + * pc_q35_init() + */ + dc->cannot_instantiate_with_device_add_yet = true; +} + +I2CBus *ich9_smb_init(PCIBus *bus, int devfn, uint32_t smb_io_base) +{ + PCIDevice *d = + pci_create_simple_multifunction(bus, devfn, true, TYPE_ICH9_SMB_DEVICE); + ICH9SMBState *s = ICH9_SMB_DEVICE(d); + return s->smb.smbus; +} + +static const TypeInfo ich9_smb_info = { + .name = TYPE_ICH9_SMB_DEVICE, + .parent = TYPE_PCI_DEVICE, + .instance_size = sizeof(ICH9SMBState), + .class_init = ich9_smb_class_init, +}; + +static void ich9_smb_register(void) +{ + type_register_static(&ich9_smb_info); +} + +type_init(ich9_smb_register); |
