diff options
Diffstat (limited to 'drivers/video/via/via-core.h')
| -rw-r--r-- | drivers/video/via/via-core.h | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/drivers/video/via/via-core.h b/drivers/video/via/via-core.h index 087c562abaec..7ffb521e1a7a 100644 --- a/drivers/video/via/via-core.h +++ b/drivers/video/via/via-core.h @@ -1,7 +1,8 @@ /* * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved. * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved. - * Copyright 2009 Jonathan Corbet <corbet@lwn.net> + * Copyright 2009-2010 Jonathan Corbet <corbet@lwn.net> + * 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 @@ -22,6 +23,8 @@ #ifndef __VIA_CORE_H__ #define __VIA_CORE_H__ +#include <linux/types.h> +#include <linux/io.h> #include <linux/spinlock.h> #include <linux/pci.h> @@ -170,4 +173,47 @@ int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg); #define VGA_WIDTH 640 #define VGA_HEIGHT 480 +/* + * Indexed port operations. Note that these are all multi-op + * functions; every invocation will be racy if you're not holding + * reg_lock. + */ + +#define VIAStatus 0x3DA /* Non-indexed port */ +#define VIACR 0x3D4 +#define VIASR 0x3C4 +#define VIAGR 0x3CE +#define VIAAR 0x3C0 + +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); +} + +#define VIA_MISC_REG_READ 0x03CC +#define VIA_MISC_REG_WRITE 0x03C2 + +static inline void via_write_misc_reg_mask(u8 data, u8 mask) +{ + u8 old = inb(VIA_MISC_REG_READ); + outb((data & mask) | (old & ~mask), VIA_MISC_REG_WRITE); +} + + #endif /* __VIA_CORE_H__ */ |