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| author | Rafal Jaworowski <raj@pollux.denx.de> | 2006-03-29 13:17:09 +0200 |
|---|---|---|
| committer | Rafal Jaworowski <raj@pollux.denx.de> | 2006-03-29 13:17:09 +0200 |
| commit | b66a9383421805c705654ce9456ec28c202819fb (patch) | |
| tree | 4fb429d1b2402185225d8aed5fa551afff9b507a /board | |
| parent | 7b4fd36b0322ec98836a8459d9be80e2777fdc05 (diff) | |
| download | u-boot-imx-b66a9383421805c705654ce9456ec28c202819fb.zip u-boot-imx-b66a9383421805c705654ce9456ec28c202819fb.tar.gz u-boot-imx-b66a9383421805c705654ce9456ec28c202819fb.tar.bz2 | |
Set SDelay register in the DDR controller for the MPC5200B chip.
Diffstat (limited to 'board')
| -rw-r--r-- | board/icecube/icecube.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/board/icecube/icecube.c b/board/icecube/icecube.c index 44831c6..4197a7c 100644 --- a/board/icecube/icecube.c +++ b/board/icecube/icecube.c @@ -27,6 +27,7 @@ #include <common.h> #include <mpc5xxx.h> #include <pci.h> +#include <asm/processor.h> #if defined(CONFIG_LITE5200B) #include "mt46v32m16.h" @@ -89,6 +90,8 @@ long int initdram (int board_type) { ulong dramsize = 0; ulong dramsize2 = 0; + uint svr, pvr; + #ifndef CFG_RAMBOOT ulong test1, test2; @@ -183,6 +186,24 @@ long int initdram (int board_type) #endif /* CFG_RAMBOOT */ + /* + * On MPC5200B we need to set the special configuration delay in the + * DDR controller. Please refer to Freescale's AN3221 "MPC5200B SDRAM + * Initialization and Configuration", 3.3.1 SDelay--MBAR + 0x0190: + * + * "The SDelay should be written to a value of 0x00000004. It is + * required to account for changes caused by normal wafer processing + * parameters." + */ + svr = get_svr(); + pvr = get_pvr(); + if ((SVR_MJREV(svr) >= 2) && + (PVR_MAJ(pvr) == 1) && (PVR_MIN(pvr) == 4)) { + + *(vu_long *)MPC5XXX_SDRAM_SDELAY = 0x04; + __asm__ volatile ("sync"); + } + return dramsize + dramsize2; } |