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-rw-r--r--cpu/mpc8xxx/ddr/ctrl_regs.c40
-rw-r--r--cpu/mpc8xxx/ddr/options.c1
2 files changed, 29 insertions, 12 deletions
diff --git a/cpu/mpc8xxx/ddr/ctrl_regs.c b/cpu/mpc8xxx/ddr/ctrl_regs.c
index 250504145..adc4f6ee3 100644
--- a/cpu/mpc8xxx/ddr/ctrl_regs.c
+++ b/cpu/mpc8xxx/ddr/ctrl_regs.c
@@ -188,12 +188,13 @@ static void set_timing_cfg_0(fsl_ddr_cfg_regs_t *ddr)
* The DDR3 spec has not tXARD,
* we use the tXP instead of it.
* tXP=max(3nCK, 7.5ns) for DDR3.
- * we use the tXP=6
* spec has not the tAXPD, we use
* tAXPD=8, need design to confirm.
*/
- act_pd_exit_mclk = 6;
- pre_pd_exit_mclk = 6;
+ int tXP = max((get_memory_clk_period_ps() * 3), 7500); /* unit=ps */
+ act_pd_exit_mclk = picos_to_mclk(tXP);
+ /* Mode register MR0[A12] is '1' - fast exit */
+ pre_pd_exit_mclk = act_pd_exit_mclk;
taxpd_mclk = 8;
tmrd_mclk = 4;
#else /* CONFIG_FSL_DDR2 */
@@ -575,18 +576,22 @@ static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr,
}
/* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
-static void set_ddr_sdram_mode_2(fsl_ddr_cfg_regs_t *ddr)
+static void set_ddr_sdram_mode_2(fsl_ddr_cfg_regs_t *ddr,
+ const memctl_options_t *popts)
{
unsigned short esdmode2 = 0; /* Extended SDRAM mode 2 */
unsigned short esdmode3 = 0; /* Extended SDRAM mode 3 */
#if defined(CONFIG_FSL_DDR3)
- unsigned int rtt_wr = 2; /* 120 ohm Rtt_WR */
+ unsigned int rtt_wr = 0; /* Rtt_WR - dynamic ODT off */
unsigned int srt = 0; /* self-refresh temerature, normal range */
unsigned int asr = 0; /* auto self-refresh disable */
unsigned int cwl = compute_cas_write_latency() - 5;
unsigned int pasr = 0; /* partial array self refresh disable */
+ if (popts->rtt_override)
+ rtt_wr = popts->rtt_wr_override_value;
+
esdmode2 = (0
| ((rtt_wr & 0x3) << 9)
| ((srt & 0x1) << 7)
@@ -1001,8 +1006,8 @@ static void set_ddr_zq_cntl(fsl_ddr_cfg_regs_t *ddr, unsigned int zq_en)
}
/* DDR Write Leveling Control (DDR_WRLVL_CNTL) */
-static void set_ddr_wrlvl_cntl(fsl_ddr_cfg_regs_t *ddr,
- unsigned int wrlvl_en)
+static void set_ddr_wrlvl_cntl(fsl_ddr_cfg_regs_t *ddr, unsigned int wrlvl_en,
+ const memctl_options_t *popts)
{
/*
* First DQS pulse rising edge after margining mode
@@ -1029,8 +1034,9 @@ static void set_ddr_wrlvl_cntl(fsl_ddr_cfg_regs_t *ddr,
/* tWL_DQSEN min = 25 nCK, we set it 32 */
wrlvl_dqsen = 0x5;
/*
- * Write leveling sample time at least need 14 clocks
- * due to tWLO = 9, we set it 15 clocks
+ * Write leveling sample time at least need 6 clocks
+ * higher than tWLO to allow enough time for progagation
+ * delay and sampling the prime data bits.
*/
wrlvl_smpl = 0xf;
/*
@@ -1043,9 +1049,16 @@ static void set_ddr_wrlvl_cntl(fsl_ddr_cfg_regs_t *ddr,
* Write leveling start time
* The value use for the DQS_ADJUST for the first sample
* when write leveling is enabled.
- * we set it 1 clock delay
*/
wrlvl_start = 0x8;
+ /*
+ * Override the write leveling sample and start time
+ * according to specific board
+ */
+ if (popts->wrlvl_override) {
+ wrlvl_smpl = popts->wrlvl_sample;
+ wrlvl_start = popts->wrlvl_start;
+ }
}
ddr->ddr_wrlvl_cntl = (0
@@ -1184,7 +1197,10 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
/* Don't set up boundaries for other CS
* other than CS0, if bank interleaving
* is enabled and not CS2+CS3 interleaved.
+ * But we need to set the ODT_RD_CFG and
+ * ODT_WR_CFG for CS1_CONFIG here.
*/
+ set_csn_config(i, ddr, popts, dimm_params);
break;
}
@@ -1321,7 +1337,7 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
set_ddr_sdram_cfg_2(ddr, popts);
set_ddr_sdram_mode(ddr, popts, common_dimm,
cas_latency, additive_latency);
- set_ddr_sdram_mode_2(ddr);
+ set_ddr_sdram_mode_2(ddr, popts);
set_ddr_sdram_interval(ddr, popts, common_dimm);
set_ddr_data_init(ddr);
set_ddr_sdram_clk_cntl(ddr, popts);
@@ -1331,7 +1347,7 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts,
set_timing_cfg_5(ddr);
set_ddr_zq_cntl(ddr, zq_en);
- set_ddr_wrlvl_cntl(ddr, wrlvl_en);
+ set_ddr_wrlvl_cntl(ddr, wrlvl_en, popts);
set_ddr_sr_cntr(ddr, sr_it);
diff --git a/cpu/mpc8xxx/ddr/options.c b/cpu/mpc8xxx/ddr/options.c
index 2e030c11a..3dcd33ddf 100644
--- a/cpu/mpc8xxx/ddr/options.c
+++ b/cpu/mpc8xxx/ddr/options.c
@@ -198,6 +198,7 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
* meet the tQDSS under different loading.
*/
popts->wrlvl_en = 1;
+ popts->wrlvl_override = 0;
#endif
/*