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/*
* Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
* Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
* Copyright 2010 Florian Tobias Schandinat <FlorianSchandinat@gmx.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, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; 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.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* basic io functions
*/
#ifndef __VIA_IO_H__
#define __VIA_IO_H__
#include <linux/types.h>
#include <linux/io.h>
/*
* Indexed port operations. Note that these are all multi-op
* functions; every invocation will be racy if you're not holding
* reg_lock.
*/
static inline u8 via_read_reg(u16 port, u8 index)
{
outb(index, port);
return inb(port + 1);
}
static inline void via_write_reg(u16 port, u8 index, u8 data)
{
outb(index, port);
outb(data, port + 1);
}
static inline void via_write_reg_mask(u16 port, u8 index, u8 data, u8 mask)
{
u8 old;
outb(index, port);
old = inb(port + 1);
outb((data & mask) | (old & ~mask), port + 1);
}
#endif /* __VIA_IO_H__ */
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