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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c389874805
This patch puts redesigned versions of the basic io functions that are used overall the driver in an extra header. It is prefixed with via_ as no framebuffer dependend stuff is in there. They were inlined as they are really simple which reduced the module size about 2.5%. The parameter order of read and write was fixed as it really doesn't make sense to change the order as they are parts of the same address and not source and destination. Wrapper which use the new functions were added to hw.h to replicate the old interface and avoid changing all old code. [jc: added one comment] Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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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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