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| author | Vitja Makarov <vitja.makarov@gmail.com> | 2009-09-18 05:48:37 +0000 |
|---|---|---|
| committer | Vitja Makarov <vitja.makarov@gmail.com> | 2009-09-18 05:48:37 +0000 |
| commit | 36e8fc08726fcf40071aad48f20df004d9c499ef (patch) | |
| tree | da5b5cb31dbbbdadf0534ec4b2b046cea17d2aaf /firmware/target/arm/tcc77x/system-target.h | |
| parent | 05fd9ee182a6a9147bd2fe285ee91307e6620c96 (diff) | |
| download | rockbox-36e8fc08726fcf40071aad48f20df004d9c499ef.tar.gz rockbox-36e8fc08726fcf40071aad48f20df004d9c499ef.zip | |
tcc77x: add tcc77x_cscfg_bw() helper for external memory bus width setup
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22729 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm/tcc77x/system-target.h')
| -rw-r--r-- | firmware/target/arm/tcc77x/system-target.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/firmware/target/arm/tcc77x/system-target.h b/firmware/target/arm/tcc77x/system-target.h index 55dd52ef47..beeeac05c6 100644 --- a/firmware/target/arm/tcc77x/system-target.h +++ b/firmware/target/arm/tcc77x/system-target.h | |||
| @@ -43,4 +43,17 @@ static inline void udelay(unsigned usecs) | |||
| 43 | while (TIME_BEFORE(USEC_TIMER, stop)); | 43 | while (TIME_BEFORE(USEC_TIMER, stop)); |
| 44 | } | 44 | } |
| 45 | 45 | ||
| 46 | |||
| 47 | #define TCC77X_CSCFG_BW8 0 | ||
| 48 | #define TCC77X_CSCFG_BW16 1 | ||
| 49 | |||
| 50 | /* Due to hardware bug or "feature" this hack is needed to set bus width bits */ | ||
| 51 | static inline | ||
| 52 | unsigned long tcc77x_cscfg_bw(int bw) { | ||
| 53 | if (bw == TCC77X_CSCFG_BW8) | ||
| 54 | return (((MCFG >> 11) & 3) ^ 3) << 28; | ||
| 55 | else | ||
| 56 | return (((MCFG >> 11) & 3) ^ 2) << 28; | ||
| 57 | } | ||
| 58 | |||
| 46 | #endif /* SYSTEM_TARGET_H */ | 59 | #endif /* SYSTEM_TARGET_H */ |