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m68k/video: Create <asm/vga.h>

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For now, it just contains the hack for cirrusfb on Amiga, which is moved
out of <video/vga.h> with some slight modifications (use raw_*() instead of
z_*(), which are defined on all m68k platforms).

This makes it safe to include <video/vga.h> in all contexts. Before it
could fail to compile with

include/video/vga.h: In function ‘vga_mm_r’:
include/video/vga.h:242: error: implicit declaration of function ‘z_readb’
include/video/vga.h: In function ‘vga_mm_w’:
include/video/vga.h:247: error: implicit declaration of function ‘z_writeb’
include/video/vga.h: In function ‘vga_mm_w_fast’:
include/video/vga.h:253: error: implicit declaration of function ‘z_writew’

or

include/video/vga.h:23:21: error: asm/vga.h: No such file or directory

depending on the value of CONFIG_AMIGA.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
This commit is contained in:
Geert Uytterhoeven 2012-04-18 11:45:17 +02:00
parent f5db9c6a3d
commit 5c3f968712
2 changed files with 27 additions and 22 deletions
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27
arch/m68k/include/asm/vga.h Normal file
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@ -0,0 +1,27 @@
#ifndef _ASM_M68K_VGA_H
#define _ASM_M68K_VGA_H
#include <asm/raw_io.h>
/*
* FIXME
* Ugh, we don't have PCI space, so map readb() and friends to use raw I/O
* accessors, which are identical to the z_*() Zorro bus accessors.
* This should make cirrusfb work again on Amiga
*/
#undef inb_p
#undef inw_p
#undef outb_p
#undef outw
#undef readb
#undef writeb
#undef writew
#define inb_p(port) 0
#define inw_p(port) 0
#define outb_p(port, val) do { } while (0)
#define outw(port, val) do { } while (0)
#define readb raw_inb
#define writeb raw_outb
#define writew raw_outw
#endif /* _ASM_M68K_VGA_H */

22
include/video/vga.h
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@ -19,29 +19,7 @@
#include <linux/types.h>
#include <asm/io.h>
#ifndef CONFIG_AMIGA
#include <asm/vga.h>
#else
/*
* FIXME
* Ugh, we don't have PCI space, so map readb() and friends to use Zorro space
* for MMIO accesses. This should make cirrusfb work again on Amiga
*/
#undef inb_p
#undef inw_p
#undef outb_p
#undef outw
#undef readb
#undef writeb
#undef writew
#define inb_p(port) 0
#define inw_p(port) 0
#define outb_p(port, val) do { } while (0)
#define outw(port, val) do { } while (0)
#define readb z_readb
#define writeb z_writeb
#define writew z_writew
#endif
#include <asm/byteorder.h>