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Florian Tobias Schandinat
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Jonathan Corbet
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May 7, 2010
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refs/heads/master: 7e0de022680f7899d33141f3ab5724a704f5669a | ||
refs/heads/master: c389874805a6849e3e347fc0e13fa170d80840c1 |
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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 | ||
*/ | ||
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#ifndef __VIA_IO_H__ | ||
#define __VIA_IO_H__ | ||
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#include <linux/types.h> | ||
#include <linux/io.h> | ||
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/* | ||
* 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); | ||
} | ||
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static inline void via_write_reg(u16 port, u8 index, u8 data) | ||
{ | ||
outb(index, port); | ||
outb(data, port + 1); | ||
} | ||
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static inline void via_write_reg_mask(u16 port, u8 index, u8 data, u8 mask) | ||
{ | ||
u8 old; | ||
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outb(index, port); | ||
old = inb(port + 1); | ||
outb((data & mask) | (old & ~mask), port + 1); | ||
} | ||
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#endif /* __VIA_IO_H__ */ |