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authorHaavard Skinnemoen <hskinnemoen@atmel.com>2007-02-12 10:28:56 -0500
committerHaavard Skinnemoen <hskinnemoen@atmel.com>2007-04-27 07:44:14 -0400
commite3e7d8d4ea37b8372ee417452d03171c5dc55125 (patch)
tree247a899f472e5cf1a3f7467dda88a017bee134a6 /include/asm-avr32/arch-at32ap/io.h
parent92b728c147adb8c690b520304f4c9ee3eee43c21 (diff)
[AVR32] Make I/O access macros work with external devices
Fix the I/O access macros so that they work with externally connected devices accessed in little-endian mode over any bus width: * Use a set of macros to define I/O port- and memory operations borrowed from MIPS. * Allow subarchitecture to specify address- and data-mangling * Implement at32ap-specific port mangling (with build-time configurable bus width. Only one bus width at a time supported for now.) * Rewrite iowriteN and friends to use write[bwl] and friends (not the __raw counterparts.) This has been tested using pata_pcmcia to access a CompactFlash card connected to the EBI (16-bit bus width.) Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Diffstat (limited to 'include/asm-avr32/arch-at32ap/io.h')
-rw-r--r--include/asm-avr32/arch-at32ap/io.h39
1 files changed, 39 insertions, 0 deletions
diff --git a/include/asm-avr32/arch-at32ap/io.h b/include/asm-avr32/arch-at32ap/io.h
new file mode 100644
index 000000000000..ee59e401f041
--- /dev/null
+++ b/include/asm-avr32/arch-at32ap/io.h
@@ -0,0 +1,39 @@
1#ifndef __ASM_AVR32_ARCH_AT32AP_IO_H
2#define __ASM_AVR32_ARCH_AT32AP_IO_H
3
4/* For "bizarre" halfword swapping */
5#include <linux/byteorder/swabb.h>
6
7#if defined(CONFIG_AP7000_32_BIT_SMC)
8# define __swizzle_addr_b(addr) (addr ^ 3UL)
9# define __swizzle_addr_w(addr) (addr ^ 2UL)
10# define __swizzle_addr_l(addr) (addr)
11# define ioswabb(a, x) (x)
12# define ioswabw(a, x) (x)
13# define ioswabl(a, x) (x)
14# define __mem_ioswabb(a, x) (x)
15# define __mem_ioswabw(a, x) swab16(x)
16# define __mem_ioswabl(a, x) swab32(x)
17#elif defined(CONFIG_AP7000_16_BIT_SMC)
18# define __swizzle_addr_b(addr) (addr ^ 1UL)
19# define __swizzle_addr_w(addr) (addr)
20# define __swizzle_addr_l(addr) (addr)
21# define ioswabb(a, x) (x)
22# define ioswabw(a, x) (x)
23# define ioswabl(a, x) swahw32(x)
24# define __mem_ioswabb(a, x) (x)
25# define __mem_ioswabw(a, x) swab16(x)
26# define __mem_ioswabl(a, x) swahb32(x)
27#else
28# define __swizzle_addr_b(addr) (addr)
29# define __swizzle_addr_w(addr) (addr)
30# define __swizzle_addr_l(addr) (addr)
31# define ioswabb(a, x) (x)
32# define ioswabw(a, x) swab16(x)
33# define ioswabl(a, x) swab32(x)
34# define __mem_ioswabb(a, x) (x)
35# define __mem_ioswabw(a, x) (x)
36# define __mem_ioswabl(a, x) (x)
37#endif
38
39#endif /* __ASM_AVR32_ARCH_AT32AP_IO_H */