1 files changed, 58 insertions, 0 deletions

diff --git a/drivers/video/via/via_io.h b/drivers/video/via/via_io.h
new file mode 100644
index 000000000000..e1c1093def00
--- /dev/null
+++ b/drivers/video/via/via_io.h
@@ -0,0 +1,58 @@
+/*
+ * 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__ */