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author | Patrick Georgi <patrick.georgi@secunet.com> | 2012-11-06 11:05:09 +0100 |
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committer | Patrick Georgi <patrick@georgi-clan.de> | 2012-11-27 09:16:58 +0100 |
commit | e72a8a3047c535bda03aecce2eca134608d1a93c (patch) | |
tree | 24d0980742dfa5aba5c286c6d2236cfed0ff92f6 /src/southbridge/intel/i82801ix/early_smbus.c | |
parent | 2efc8808b8bfaee0a0e8f3ee387ecd9a3f049705 (diff) | |
download | coreboot-e72a8a3047c535bda03aecce2eca134608d1a93c.tar.xz |
intel/i82801ix: new southbridge, ICH9
Add support for ICH9 southbridge
Change-Id: I70612431101bf48d9dcc96ee1b37d257c9ad2ee2
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1690
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Diffstat (limited to 'src/southbridge/intel/i82801ix/early_smbus.c')
-rw-r--r-- | src/southbridge/intel/i82801ix/early_smbus.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801ix/early_smbus.c b/src/southbridge/intel/i82801ix/early_smbus.c new file mode 100644 index 0000000000..a2d8544ba0 --- /dev/null +++ b/src/southbridge/intel/i82801ix/early_smbus.c @@ -0,0 +1,64 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 coresystems GmbH + * 2012 secunet Security Networks AG + * + * 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; version 2 of + * the License. + * + * 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 <arch/io.h> +#include <arch/romcc_io.h> +#include <console/console.h> +#include <device/pci_ids.h> +#include <device/pci_def.h> +#include "i82801ix.h" +#include "smbus.h" + +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) != 0x2930) { + 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.\n"); +} + +int smbus_read_byte(unsigned device, unsigned address) +{ + return do_smbus_read_byte(SMBUS_IO_BASE, device, address); +} + |