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author | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2012-04-04 00:07:22 +0200 |
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committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2012-04-04 19:10:51 +0200 |
commit | 8e073829ec69ee89b3e91f4c040c96988084a526 (patch) | |
tree | 2e2b378ec66aa3ecd563b253726aae6e71db043a /src/southbridge/intel/bd82x6x/early_smbus.c | |
parent | cb91e1525eb0b81f9bc2e24e3404d6a9efc1cce3 (diff) | |
download | coreboot-8e073829ec69ee89b3e91f4c040c96988084a526.tar.xz |
Add support for Intel Panther Point PCH
Change-Id: Iac3cd25b36493bb203e849674320e113cc5fce32
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/853
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/southbridge/intel/bd82x6x/early_smbus.c')
-rw-r--r-- | src/southbridge/intel/bd82x6x/early_smbus.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/southbridge/intel/bd82x6x/early_smbus.c b/src/southbridge/intel/bd82x6x/early_smbus.c new file mode 100644 index 0000000000..b13369af59 --- /dev/null +++ b/src/southbridge/intel/bd82x6x/early_smbus.c @@ -0,0 +1,63 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 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; 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 "pch.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, 0x0) != 0x8086) { + 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); +} + |