diff options
author | stepan <stepan@coresystems.de> | 2010-12-08 05:42:47 +0000 |
---|---|---|
committer | Stefan Reinauer <stepan@openbios.org> | 2010-12-08 05:42:47 +0000 |
commit | 836ae29ee325b1e3d28ff59468cc50913b1e24ce (patch) | |
tree | e2691a1e1ee1d795ffe7a99fb93778a9910044c2 /src/southbridge/intel/i82801ax/early_smbus.c | |
parent | 1bc5ccac51d94cfb4f9666ecf2cac619d8dc80a6 (diff) | |
download | coreboot-836ae29ee325b1e3d28ff59468cc50913b1e24ce.tar.xz |
first round name simplification. drop the <component>_ prefix.
the prefix was introduced in the early v2 tree many years ago
because our old build system "newconfig" could not handle two files with
the same name in different paths like /path/to/usb.c and
/another/path/to/usb.c correctly. Only one of the files would end up
being compiled into the final image.
Since Kconfig (actually since shortly before we switched to Kconfig) we
don't suffer from that problem anymore. So we could drop the sb700_
prefix from all those filenames (or, the <componentname>_ prefix in general)
- makes it easier to fork off a new chipset
- makes it easier to diff against other chipsets
- storing redundant information in filenames seems wrong
Signed-off-by: <stepan@coresystems.de>
Acked-by: Patrick Georgi <patrick@georgi-clan.de>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6149 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge/intel/i82801ax/early_smbus.c')
-rw-r--r-- | src/southbridge/intel/i82801ax/early_smbus.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801ax/early_smbus.c b/src/southbridge/intel/i82801ax/early_smbus.c new file mode 100644 index 0000000000..e894c37095 --- /dev/null +++ b/src/southbridge/intel/i82801ax/early_smbus.c @@ -0,0 +1,61 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2005 Tyan Computer + * (Written by Yinghai Lu <yinghailu@gmail.com> for Tyan Computer) + * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> + * + * 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 <arch/io.h> +#include <arch/romcc_io.h> +#include <console/console.h> +#include <device/pci_ids.h> +#include <device/pci_def.h> +#include "i82801ax.h" +#include "smbus.h" + +void enable_smbus(void) +{ + device_t dev; + + /* Set the SMBus device statically (D31:F3). */ + dev = PCI_DEV(0x0, 0x1f, 0x3); + + /* 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(u8 device, u8 address) +{ + return do_smbus_read_byte(SMBUS_IO_BASE, device, address); +} + |