diff options
| author | Dave Liu <daveliu@freescale.com> | 2008-11-21 16:31:22 +0800 |
|---|---|---|
| committer | Andrew Fleming-AFLEMING <afleming@freescale.com> | 2009-01-23 17:03:13 -0600 |
| commit | 80ee3ce6d7fe9441b4352d7cfaf6afc2507b1106 (patch) | |
| tree | 272a979e6e9ed0ae0ab583068657c33793b4355c /cpu/mpc8xxx | |
| parent | aca5f018a8386b85469482ed9867e3e29a2437d0 (diff) | |
fsl-ddr: update the bit mask for DDR3 controller
According to the latest 8572 UM, the DDR3 controller
is expanding the bit mask, and we use the extend ACTTOPRE
mode when tRAS more than 19 MCLK.
Signed-off-by: Dave Liu <daveliu@freescale.com>
Diffstat (limited to 'cpu/mpc8xxx')
| -rw-r--r-- | cpu/mpc8xxx/ddr/ctrl_regs.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/cpu/mpc8xxx/ddr/ctrl_regs.c b/cpu/mpc8xxx/ddr/ctrl_regs.c index 1783e927a..d5cdc362f 100644 --- a/cpu/mpc8xxx/ddr/ctrl_regs.c +++ b/cpu/mpc8xxx/ddr/ctrl_regs.c @@ -185,10 +185,14 @@ static void set_timing_cfg_3(fsl_ddr_cfg_regs_t *ddr, unsigned int ext_caslat = 0; /* Extended MCAS latency from READ cmd */ unsigned int cntl_adj = 0; /* Control Adjust */ + /* If the tRAS > 19 MCLK, we use the ext mode */ + if (picos_to_mclk(common_dimm->tRAS_ps) > 0x13) + ext_acttopre = 1; + ext_refrec = (picos_to_mclk(common_dimm->tRFC_ps) - 8) >> 4; ddr->timing_cfg_3 = (0 | ((ext_acttopre & 0x1) << 24) - | ((ext_refrec & 0x7) << 16) + | ((ext_refrec & 0xF) << 16) | ((ext_caslat & 0x1) << 12) | ((cntl_adj & 0x7) << 0) ); @@ -251,12 +255,12 @@ static void set_timing_cfg_1(fsl_ddr_cfg_regs_t *ddr, wrtord_mclk = picos_to_mclk(common_dimm->tWTR_ps); ddr->timing_cfg_1 = (0 - | ((pretoact_mclk & 0x07) << 28) + | ((pretoact_mclk & 0x0F) << 28) | ((acttopre_mclk & 0x0F) << 24) - | ((acttorw_mclk & 0x7) << 20) + | ((acttorw_mclk & 0xF) << 20) | ((caslat_ctrl & 0xF) << 16) | ((refrec_ctrl & 0xF) << 12) - | ((wrrec_mclk & 0x07) << 8) + | ((wrrec_mclk & 0x0F) << 8) | ((acttoact_mclk & 0x07) << 4) | ((wrtord_mclk & 0x07) << 0) ); |