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authorDave Liu <daveliu@freescale.com>2008-11-21 16:31:22 +0800
committerAndrew Fleming-AFLEMING <afleming@freescale.com>2009-01-23 17:03:13 -0600
commit80ee3ce6d7fe9441b4352d7cfaf6afc2507b1106 (patch)
tree272a979e6e9ed0ae0ab583068657c33793b4355c
parentaca5f018a8386b85469482ed9867e3e29a2437d0 (diff)
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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>
-rw-r--r--cpu/mpc8xxx/ddr/ctrl_regs.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/cpu/mpc8xxx/ddr/ctrl_regs.c b/cpu/mpc8xxx/ddr/ctrl_regs.c
index 1783e92..d5cdc36 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)
);