[U-Boot-Users] Problem booting MPC8568MDS board + improvement suggestion
Hello, I've got the MPC8568MDS board. When I try to compile the latest version of U-boot for this board and burn it onto its flash, the boot process gets stuck right after the RAM initialization sequence (it prints the DDR+SDRAM size, but doesn't continue). As far as I was able to see with my ICE, the DDR wasn't properly initialized after the DDR setup sequence (wasn't able to track the exact reason). The thing is that the original Flash image I've got from Freescale does boot properly on the same board. Its startup prints indicate that it's based on version 1.2.0 as well, but there's no way to know which version of the current tree was taken for this purpose (the date only specifies the compilation date - not the tree version date). I don't think it has to do with my compilation environment - I use ELDK 4.0 (used it also with the MPC 8560 & 8360 processors with success). Would appreciate any help, especially information about the last version that was stable with this board. This brings me to suggest the following improvement: With every check in to the U-boot tree (any of them), there should also be a main auto generated file, that includes the date, tree name and perhaps an auto incremented build version. This information should be printed at startup along with major version and compilation date. This should give proper details for the referenced U-boot version. Best regards, David.
On Wed, 2007-07-18 at 07:50, David Saada wrote:
This brings me to suggest the following improvement: With every check in to the U-boot tree (any of them), there should also be a main auto generated file, that includes the date, tree name and perhaps an auto incremented build version. This information should be printed at startup along with major version and compilation date. This should give proper details for the referenced U-boot version. Best regards, David.
Support for this suggestion is, fundamentally, already present in that the git SHA1 of the commit that is being built can be added to the banner message.
jdl
On Wed, 2007-07-18 at 07:50, David Saada wrote:
I've got the MPC8568MDS board. When I try to compile the latest version of U-boot for this board and burn it onto its flash, the boot process gets stuck right after the RAM initialization sequence (it prints the DDR+SDRAM size, but doesn't continue).
If you use 1.93 or above version of MPC8568MDS, you need to modify some settings for DDR initialization in spd_sdram.c. In specific, you need to modify clk_adjust and cpo value, you can take the follow patch as reference. This patch has not been submitted yet but included in the BSP already.
--- cpu/mpc85xx/spd_sdram.c | 12 +++++++----- 1 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/cpu/mpc85xx/spd_sdram.c b/cpu/mpc85xx/spd_sdram.c index 3777f49..ba255f8 100644 --- a/cpu/mpc85xx/spd_sdram.c +++ b/cpu/mpc85xx/spd_sdram.c @@ -645,13 +645,10 @@ spd_sdram(void) */ cpo = 0; if (spd.mem_type == SPD_MEMTYPE_DDR2) { - if (effective_data_rate == 266 || effective_data_rate == 333) { + if (effective_data_rate <= 333) { cpo = 0x7; /* READ_LAT + 5/4 */ - } else if (effective_data_rate == 400) { - cpo = 0x9; /* READ_LAT + 7/4 */ } else { - /* Pure speculation */ - cpo = 0xb; + cpo = 0x9; /* READ_LAT + 7/4 */ } }
@@ -858,7 +855,12 @@ spd_sdram(void) if (spd.mem_type == SPD_MEMTYPE_DDR) clk_adjust = 0x6; else +#ifdef CONFIG_MPC8568 + /* Empirally setting clk_adjust */ + clk_adjust = 0x6; +#else clk_adjust = 0x7; +#endif
ddr->sdram_clk_cntl = (0 | 0x80000000
participants (3)
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David Saada -
Jon Loeliger -
Wang Haiying-r54964