2 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
3 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
4 * Copyright 2010 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public
8 * License as published by the Free Software Foundation;
9 * either version 2, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
13 * the implied warranty of MERCHANTABILITY or FITNESS FOR
14 * A PARTICULAR PURPOSE.See the GNU General Public License
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
20 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 #include <linux/types.h>
32 #define VIA_MISC_REG_READ 0x03CC
33 #define VIA_MISC_REG_WRITE 0x03C2
36 * Indexed port operations. Note that these are all multi-op
37 * functions; every invocation will be racy if you're not holding
40 static inline u8 via_read_reg(u16 port, u8 index)
46 static inline void via_write_reg(u16 port, u8 index, u8 data)
52 static inline void via_write_reg_mask(u16 port, u8 index, u8 data, u8 mask)
58 outb((data & mask) | (old & ~mask), port + 1);
61 static inline void via_write_misc_reg_mask(u8 data, u8 mask)
63 u8 old = inb(VIA_MISC_REG_READ);
64 outb((data & mask) | (old & ~mask), VIA_MISC_REG_WRITE);
67 #endif /* __VIA_IO_H__ */