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author | Haavard Skinnemoen <hskinnemoen@atmel.com> | 2007-02-12 15:28:56 (GMT) |
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committer | Haavard Skinnemoen <hskinnemoen@atmel.com> | 2007-04-27 11:44:14 (GMT) |
commit | e3e7d8d4ea37b8372ee417452d03171c5dc55125 (patch) | |
tree | 247a899f472e5cf1a3f7467dda88a017bee134a6 /arch/avr32/mach-at32ap/Kconfig | |
parent | 92b728c147adb8c690b520304f4c9ee3eee43c21 (diff) | |
download | linux-fsl-qoriq-e3e7d8d4ea37b8372ee417452d03171c5dc55125.tar.xz |
[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 'arch/avr32/mach-at32ap/Kconfig')
-rw-r--r-- | arch/avr32/mach-at32ap/Kconfig | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/arch/avr32/mach-at32ap/Kconfig b/arch/avr32/mach-at32ap/Kconfig index d749771..eb30783 100644 --- a/arch/avr32/mach-at32ap/Kconfig +++ b/arch/avr32/mach-at32ap/Kconfig @@ -2,6 +2,30 @@ if PLATFORM_AT32AP menu "Atmel AVR32 AP options" +choice + prompt "AT32AP7000 static memory bus width" + depends on CPU_AT32AP7000 + default AP7000_16_BIT_SMC + help + Define the width of the AP7000 external static memory interface. + This is used to determine how to mangle the address and/or data + when doing little-endian port access. + + The current code can only support a single external memory bus + width for all chip selects, excluding the flash (which is using + raw access and is thus not affected by any of this.) + +config AP7000_32_BIT_SMC + bool "32 bit" + +config AP7000_16_BIT_SMC + bool "16 bit" + +config AP7000_8_BIT_SMC + bool "8 bit" + +endchoice + endmenu -endif +endif # PLATFORM_AT32AP |