diff options
author | stepan <stepan@coresystems.de> | 2010-12-08 07:07:33 +0000 |
---|---|---|
committer | Stefan Reinauer <stepan@openbios.org> | 2010-12-08 07:07:33 +0000 |
commit | 8301d8348a0848d56fdf4dbd76acd6bdcd3fc944 (patch) | |
tree | fc0064592143c4cef40319c36fa907b72e071d81 /src/superio/smsc/smscsuperio/early_serial.c | |
parent | 836ae29ee325b1e3d28ff59468cc50913b1e24ce (diff) |
second 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@6150 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/superio/smsc/smscsuperio/early_serial.c')
-rw-r--r-- | src/superio/smsc/smscsuperio/early_serial.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/superio/smsc/smscsuperio/early_serial.c b/src/superio/smsc/smscsuperio/early_serial.c new file mode 100644 index 0000000000..281a35c861 --- /dev/null +++ b/src/superio/smsc/smscsuperio/early_serial.c @@ -0,0 +1,46 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de> + * + * 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/romcc_io.h> +#include <device/pnp_def.h> + +/* All known/supported SMSC Super I/Os have the same logical device IDs + * for the serial ports (COM1, COM2). + */ +#define SMSCSUPERIO_SP1 4 /* Com1 */ +#define SMSCSUPERIO_SP2 5 /* Com2 */ + +/** + * Enable the specified serial port. + * + * @param dev The device to use. + * @param iobase The I/O base of the serial port (usually 0x3f8/0x2f8). + */ +static inline void smscsuperio_enable_serial(device_t dev, u16 iobase) +{ + u16 port = dev >> 8; + + outb(0x55, port); /* Enter the configuration state. */ + pnp_set_logical_device(dev); + pnp_set_enable(dev, 0); + pnp_set_iobase(dev, PNP_IDX_IO0, iobase); + pnp_set_enable(dev, 1); + outb(0xaa, port); /* Exit the configuration state. */ +} |