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| author | Stefan Reinauer <stepan@coresystems.de> | 2008-10-29 04:46:52 +0000 |
|---|---|---|
| committer | Stefan Reinauer <stepan@openbios.org> | 2008-10-29 04:46:52 +0000 |
| commit | debb11fc1fe5f5560015ab9905f1ccc2e08c73e0 (patch) | |
| tree | 9160cd3787a3213a38f5e9b9942360bcaf753f1a /src/southbridge/intel/i82801gx/i82801gx_early_smbus.c | |
| parent | b70d1993a432af2a026c4cad0fa3dd3c5eca1ef7 (diff) | |
| download | coreboot-staging-debb11fc1fe5f5560015ab9905f1ccc2e08c73e0.zip coreboot-staging-debb11fc1fe5f5560015ab9905f1ccc2e08c73e0.tar.gz | |
Support for the Intel ICH7 southbridge.
This includes an early SMI handler.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3701 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge/intel/i82801gx/i82801gx_early_smbus.c')
| -rw-r--r-- | src/southbridge/intel/i82801gx/i82801gx_early_smbus.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801gx/i82801gx_early_smbus.c b/src/southbridge/intel/i82801gx/i82801gx_early_smbus.c new file mode 100644 index 0000000..5fe1daa --- /dev/null +++ b/src/southbridge/intel/i82801gx/i82801gx_early_smbus.c @@ -0,0 +1,59 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008 coresystems GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <device/pci_ids.h> +#include "i82801gx.h" +#include "i82801gx_smbus.h" + +static void enable_smbus(void) +{ + device_t dev; + + /* Set the SMBus device statically. */ + dev = PCI_DEV(0x0, 0x1f, 0x3); + + /* Check to make sure we've got the right device. */ + if (pci_read_config16(dev, 0x2) != 0x27da) { + die("SMBus controller not found!"); + } + + /* Set SMBus I/O base. */ + pci_write_config32(dev, SMB_BASE, + SMBUS_IO_BASE | PCI_BASE_ADDRESS_SPACE_IO); + + /* Set SMBus enable. */ + pci_write_config8(dev, HOSTC, HST_EN); + + /* Set SMBus I/O space enable. */ + pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO); + + /* Disable interrupt generation. */ + outb(0, SMBUS_IO_BASE + SMBHSTCTL); + + /* Clear any lingering errors, so transactions can run. */ + outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT); + print_debug("SMBus controller enabled.\r\n"); +} + +static inline int smbus_read_byte(unsigned device, unsigned address) +{ + return do_smbus_read_byte(device, address); +} + |
