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| author | Stefan Roese <sr@denx.de> | 2008-07-18 15:57:23 +0200 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2008-07-18 15:57:23 +0200 |
| commit | 66fe183b1dd9c7534605147a8ecfed1c02345ee5 (patch) | |
| tree | aa34ce1eea6c8c851543c497cf56a20bc0b195ef /cpu/ppc4xx/44x_spd_ddr2.c | |
| parent | 699f05125509249072a0b865c8d35520d97cd501 (diff) | |
| download | u-boot-imx-66fe183b1dd9c7534605147a8ecfed1c02345ee5.zip u-boot-imx-66fe183b1dd9c7534605147a8ecfed1c02345ee5.tar.gz u-boot-imx-66fe183b1dd9c7534605147a8ecfed1c02345ee5.tar.bz2 | |
ppc4xx: Fix incorrect MODTx setup for some DIMM configurations
This patch fixes a problem with incorrect MODTx (On Die Termination)
setup for a configuration with multiple DIMM's and multiple ranks.
Without this change Katmai was unable to boot Linux with DDR2 frequency
>= 533MHz and mem>=3GB. With this patch Katmai successfully boots Linux
with DDR2 frequency = 640MHz and mem=4GB.
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'cpu/ppc4xx/44x_spd_ddr2.c')
| -rw-r--r-- | cpu/ppc4xx/44x_spd_ddr2.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/cpu/ppc4xx/44x_spd_ddr2.c b/cpu/ppc4xx/44x_spd_ddr2.c index a27e276..e9940e8 100644 --- a/cpu/ppc4xx/44x_spd_ddr2.c +++ b/cpu/ppc4xx/44x_spd_ddr2.c @@ -1150,50 +1150,50 @@ static void program_codt(unsigned long *dimm_populated, if (dimm_type == SDRAM_DDR2) { codt |= SDRAM_CODT_DQS_1_8_V_DDR2; if ((total_dimm == 1) && (firstSlot == TRUE)) { - if (total_rank == 1) { + if (total_rank == 1) { /* PUUU */ codt |= CALC_ODT_R(0); modt0 = CALC_ODT_W(0); modt1 = 0x00000000; modt2 = 0x00000000; modt3 = 0x00000000; } - if (total_rank == 2) { + if (total_rank == 2) { /* PPUU */ codt |= CALC_ODT_R(0) | CALC_ODT_R(1); - modt0 = CALC_ODT_W(0); - modt1 = CALC_ODT_W(0); + modt0 = CALC_ODT_W(0) | CALC_ODT_W(1); + modt1 = 0x00000000; modt2 = 0x00000000; modt3 = 0x00000000; } } else if ((total_dimm == 1) && (firstSlot != TRUE)) { - if (total_rank == 1) { + if (total_rank == 1) { /* UUPU */ codt |= CALC_ODT_R(2); modt0 = 0x00000000; modt1 = 0x00000000; modt2 = CALC_ODT_W(2); modt3 = 0x00000000; } - if (total_rank == 2) { + if (total_rank == 2) { /* UUPP */ codt |= CALC_ODT_R(2) | CALC_ODT_R(3); modt0 = 0x00000000; modt1 = 0x00000000; - modt2 = CALC_ODT_W(2); - modt3 = CALC_ODT_W(2); + modt2 = CALC_ODT_W(2) | CALC_ODT_W(3); + modt3 = 0x00000000; } } if (total_dimm == 2) { - if (total_rank == 2) { + if (total_rank == 2) { /* PUPU */ codt |= CALC_ODT_R(0) | CALC_ODT_R(2); modt0 = CALC_ODT_RW(2); modt1 = 0x00000000; modt2 = CALC_ODT_RW(0); modt3 = 0x00000000; } - if (total_rank == 4) { + if (total_rank == 4) { /* PPPP */ codt |= CALC_ODT_R(0) | CALC_ODT_R(1) | CALC_ODT_R(2) | CALC_ODT_R(3); - modt0 = CALC_ODT_RW(2); + modt0 = CALC_ODT_RW(2) | CALC_ODT_RW(3); modt1 = 0x00000000; - modt2 = CALC_ODT_RW(0); + modt2 = CALC_ODT_RW(0) | CALC_ODT_RW(1); modt3 = 0x00000000; } } |