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| author | Dave Liu <daveliu@freescale.com> | 2009-03-14 12:48:30 +0800 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-03-30 13:33:50 -0500 |
| commit | c360ceac0286159f94d9d1a9496fc9858c8d9bec (patch) | |
| tree | fdd1868af478993fdb547171665c5c517ee6c071 /cpu/mpc8xxx/ddr/options.c | |
| parent | 6a8197836702991468cead5ead073f589e2623ad (diff) | |
| download | blackbird-obmc-uboot-c360ceac0286159f94d9d1a9496fc9858c8d9bec.tar.gz blackbird-obmc-uboot-c360ceac0286159f94d9d1a9496fc9858c8d9bec.zip | |
fsl-ddr: add the DDR3 SPD infrastructure
- support mirrored DIMMs, not support register DIMMs
- test passed on P2020DS board with MT9JSF12872AY-1G1D1
- test passed on MPC8569MDS board with MT8JSF12864HY-1G1D1
Signed-off-by: Dave Liu <daveliu@freescale.com>
Signed-off-by: Travis Wheatley <travis.wheatley@freescale.com>
Diffstat (limited to 'cpu/mpc8xxx/ddr/options.c')
| -rw-r--r-- | cpu/mpc8xxx/ddr/options.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/cpu/mpc8xxx/ddr/options.c b/cpu/mpc8xxx/ddr/options.c index 29d4143437..db442918e9 100644 --- a/cpu/mpc8xxx/ddr/options.c +++ b/cpu/mpc8xxx/ddr/options.c @@ -96,10 +96,8 @@ unsigned int populate_memctl_options(int all_DIMMs_registered, */ #if defined(CONFIG_FSL_DDR1) popts->DQS_config = 0; -#elif defined(CONFIG_FSL_DDR2) +#elif defined(CONFIG_FSL_DDR2) || defined(CONFIG_FSL_DDR3) popts->DQS_config = 1; -#else -#error "Fix DQS for DDR3" #endif /* Choose self-refresh during sleep. */ @@ -112,7 +110,17 @@ unsigned int populate_memctl_options(int all_DIMMs_registered, popts->data_bus_width = 0; /* Choose burst length. */ - popts->burst_length = 4; /* has to be 4 for DDR2 */ +#if defined(CONFIG_FSL_DDR3) + popts->OTF_burst_chop_en = 1; /* on-the-fly burst chop */ + popts->burst_length = DDR_OTF; /* on-the-fly BC4 and BL8 */ +#else + popts->burst_length = DDR_BL4; /* has to be 4 for DDR2 */ +#endif + + /* Choose ddr controller address mirror mode */ +#if defined(CONFIG_FSL_DDR3) + popts->mirrored_dimm = pdimm[0].mirrored_dimm; +#endif /* Global Timing Parameters. */ debug("mclk_ps = %u ps\n", get_memory_clk_period_ps()); @@ -181,7 +189,17 @@ unsigned int populate_memctl_options(int all_DIMMs_registered, popts->tFAW_window_four_activates_ps = 37500; #elif defined(CONFIG_FSL_DDR3) -#error "FIXME determine four activates for DDR3" + popts->tFAW_window_four_activates_ps = pdimm[0].tFAW_ps; +#endif + popts->zq_en = 0; + popts->wrlvl_en = 0; +#if defined(CONFIG_FSL_DDR3) + /* + * due to ddr3 dimm is fly-by topology + * we suggest to enable write leveling to + * meet the tQDSS under different loading. + */ + popts->wrlvl_en = 1; #endif /* |
