59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
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/*
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* Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
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* Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
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* Copyright 2010 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation;
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* either version 2, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE.See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* basic io functions
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*/
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#ifndef __VIA_IO_H__
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#define __VIA_IO_H__
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#include <linux/types.h>
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#include <linux/io.h>
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/*
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* Indexed port operations. Note that these are all multi-op
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* functions; every invocation will be racy if you're not holding
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* reg_lock.
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*/
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static inline u8 via_read_reg(u16 port, u8 index)
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{
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outb(index, port);
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return inb(port + 1);
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}
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static inline void via_write_reg(u16 port, u8 index, u8 data)
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{
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outb(index, port);
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outb(data, port + 1);
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}
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static inline void via_write_reg_mask(u16 port, u8 index, u8 data, u8 mask)
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{
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u8 old;
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outb(index, port);
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old = inb(port + 1);
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outb((data & mask) | (old & ~mask), port + 1);
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}
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#endif /* __VIA_IO_H__ */
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