powerpc/t104xrdb: Update DDR initialization related settings

PATCH New Priyanka Jain 2 participants 2 messages Feb 26, 2014 – Mar 7, 2014

Share & tools

Priyanka Jain

author

2014-02-26 04:08 UTC #0 lore raw

PATCH v2 1/1 powerpc/t104xrdb: Update DDR initialization related settings

Update following DDR related settings for T1040RDB, T1042RDB_PI -Correct number of chip selects to two as t1040 supports
two Chip selects.
-Update board_specific_parameters udimm structure with settings
derived via calibration.
-Update ddr_raw_timing sructure corresponding to DIMM. -Set ODT to off. Typically on FSL board, ODT is set to 75 ohm,
but on T104xRDB, on setting this , DDR instability is observed. Board-level debugging is in progress.

Verified the updated settings to be working fine with dual-ranked Micron, MT18KSF51272AZ-1G6 DIMM at data rate 1600MT/s.

Signed-off-by Priyanka Jain <[email protected]>

Signed-off-by York Sun <[email protected]>

---
Changes for v2:
Udpated description related to ODT off, Removed cpo, write_data_delay, force_2t parameters as they are not longer used.

 board/freescale/t104xrdb/ddr.c |   13 +++----------
 board/freescale/t104xrdb/ddr.h |   38 ++++++++++++++++++++------------------
 include/configs/T1040RDB.h     |    2 +-
 include/configs/T1042RDB_PI.h  |    2 +-
 4 files changed, 25 insertions(+), 30 deletions(-)

board/freescale/t104xrdb/ddr.c +3 ~~-10~~

index 9009afa..57d0f9c 100644
@@ -46,7 +46,7 @@ void fsl_ddr_board_options(memctl_options_t *popts,
 
 	pbsp = udimms[0];
 
-	/* Get clk_adjust, cpo, write_data_delay,2t, according to the board ddr
+	/* Get clk_adjust according to the board ddr
 	 * freqency and n_banks specified in board_specific_parameters table.
 	 */
 	ddr_freq = get_ddr_freq(0) / 1000000;

@@ -54,14 +54,10 @@ void fsl_ddr_board_options(memctl_options_t *popts,
 		if (pbsp->n_ranks == pdimm->n_ranks &&
 		    (pdimm->rank_density >> 30) >= pbsp->rank_gb) {
 			if (ddr_freq <= pbsp->datarate_mhz_high) {
-				popts->cpo_override = pbsp->cpo;
-				popts->write_data_delay =
-					pbsp->write_data_delay;
 				popts->clk_adjust = pbsp->clk_adjust;
 				popts->wrlvl_start = pbsp->wrlvl_start;
 				popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
 				popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
-				popts->twot_en = pbsp->force_2t;
 				goto found;
 			}
 			pbsp_highest = pbsp;

@@ -74,13 +70,10 @@ void fsl_ddr_board_options(memctl_options_t *popts,
 		printf("for data rate %lu MT/s\n", ddr_freq);
 		printf("Trying to use the highest speed (%u) parameters\n",
 		       pbsp_highest->datarate_mhz_high);
-		popts->cpo_override = pbsp_highest->cpo;
-		popts->write_data_delay = pbsp_highest->write_data_delay;
 		popts->clk_adjust = pbsp_highest->clk_adjust;
 		popts->wrlvl_start = pbsp_highest->wrlvl_start;
 		popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
 		popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
-		popts->twot_en = pbsp_highest->force_2t;
 	} else {
 		panic("DIMM is not supported by this board");
 	}

@@ -112,8 +105,8 @@ found:
 	popts->zq_en = 1;
 
 	/* DHC_EN =1, ODT = 75 Ohm */
-	popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
-	popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
+	popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_OFF);
+	popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_OFF);
 }
 
 phys_size_t initdram(int board_type)

board/freescale/t104xrdb/ddr.h +20 ~~-18~~

index 9276b59..09b30b9 100644
@@ -6,7 +6,6 @@
 
 #ifndef __DDR_H__
 #define __DDR_H__
-
 dimm_params_t ddr_raw_timing = {
 	.n_ranks = 2,
 	.rank_density = 2147483648u,

@@ -14,22 +13,21 @@ dimm_params_t ddr_raw_timing = {
 	.primary_sdram_width = 64,
 	.ec_sdram_width = 8,
 	.registered_dimm = 0,
-	.mirrored_dimm = 1,
+	.mirrored_dimm = 0,
 	.n_row_addr = 15,
 	.n_col_addr = 10,
 	.n_banks_per_sdram_device = 8,
 	.edc_config = 2,	/* ECC */
 	.burst_lengths_bitmask = 0x0c,
-
 	.tckmin_x_ps = 1071,
-	.caslat_x = 0x2fe << 4,	/* 5,6,7,8,9,10,11,13 */
-	.taa_ps = 13910,
+	.caslat_x = 0xfe << 4,	/* 5,6,7,8,9,10,11 */
+	.taa_ps = 13125,
 	.twr_ps = 15000,
-	.trcd_ps = 13910,
+	.trcd_ps = 13125,
 	.trrd_ps = 6000,
-	.trp_ps = 13910,
+	.trp_ps = 13125,
 	.tras_ps = 34000,
-	.trc_ps = 48910,
+	.trc_ps = 48125,
 	.trfc_ps = 260000,
 	.twtr_ps = 7500,
 	.trtp_ps = 7500,

@@ -45,9 +43,6 @@ struct board_specific_parameters {
 	u32 wrlvl_start;
 	u32 wrlvl_ctl_2;
 	u32 wrlvl_ctl_3;
-	u32 cpo;
-	u32 write_data_delay;
-	u32 force_2t;
 };
 
 /*

@@ -59,14 +54,21 @@ struct board_specific_parameters {
 static const struct board_specific_parameters udimm0[] = {
 	/*
 	 * memory controller 0
-	 *   num|  hi| rank|  clk| wrlvl |   wrlvl   |  wrlvl | cpo  |wrdata|2T
-	 * ranks| mhz| GB  |adjst| start |   ctl2    |  ctl3  |      |delay |
+	 *   num|  hi| rank|  clk| wrlvl |   wrlvl
+	 * ranks| mhz| GB  |adjst| start |   ctl2
 	 */
-	{2,  1066, 4, 8,     4, 0x05070609, 0x08090a08,   0xff,    2,  0},
-	{2,  1350, 4, 4,     8, 0x0809090b, 0x0c0c0d0a,   0xff,    2,  0},
-	{2,  1350, 0, 5,     7, 0x0709090b, 0x0c0c0d09,   0xff,    2,  0},
-	{2,  1666, 4, 4,     8, 0x080a0a0d, 0x0d10100b,   0xff,    2,  0},
-	{2,  1666, 0, 5,     7, 0x080a0a0c, 0x0d0d0e0a,   0xff,    2,  0},
+	{2,  833,  4, 4,     6, 0x06060607, 0x08080807},
+	{2,  833,  0, 4,     6, 0x06060607, 0x08080807},
+	{2,  1350, 4, 4,     7, 0x0708080A, 0x0A0B0C09},
+	{2,  1350, 0, 4,     7, 0x0708080A, 0x0A0B0C09},
+	{2,  1666, 4, 4,     7, 0x0808090B, 0x0C0D0E0A},
+	{2,  1666, 0, 4,     7, 0x0808090B, 0x0C0D0E0A},
+	{1,  833,  4, 4,     6, 0x06060607, 0x08080807},
+	{1,  833,  0, 4,     6, 0x06060607, 0x08080807},
+	{1,  1350, 4, 4,     7, 0x0708080A, 0x0A0B0C09},
+	{1,  1350, 0, 4,     7, 0x0708080A, 0x0A0B0C09},
+	{1,  1666, 4, 4,     7, 0x0808090B, 0x0C0D0E0A},
+	{1,  1666, 0, 4,     7, 0x0808090B, 0x0C0D0E0A},
 	{}
 };

include/configs/T1040RDB.h +1 -1

index 7cfda50..c6c214c 100644
@@ -147,7 +147,7 @@
 
 /* CONFIG_NUM_DDR_CONTROLLERS is defined in include/asm/config_mpc85xx.h */
 #define CONFIG_DIMM_SLOTS_PER_CTLR	1
-#define CONFIG_CHIP_SELECTS_PER_CTRL	(4 * CONFIG_DIMM_SLOTS_PER_CTLR)
+#define CONFIG_CHIP_SELECTS_PER_CTRL	(2 * CONFIG_DIMM_SLOTS_PER_CTLR)
 
 #define CONFIG_DDR_SPD
 #define CONFIG_SYS_DDR_RAW_TIMING

include/configs/T1042RDB_PI.h +1 -1

index ed9ca8a..5102d49 100644
@@ -147,7 +147,7 @@
 
 /* CONFIG_NUM_DDR_CONTROLLERS is defined in include/asm/config_mpc85xx.h */
 #define CONFIG_DIMM_SLOTS_PER_CTLR	1
-#define CONFIG_CHIP_SELECTS_PER_CTRL	(4 * CONFIG_DIMM_SLOTS_PER_CTLR)
+#define CONFIG_CHIP_SELECTS_PER_CTRL	(2 * CONFIG_DIMM_SLOTS_PER_CTLR)
 
 #define CONFIG_DDR_SPD
 #define CONFIG_SYS_DDR_RAW_TIMING

Signature · 1 line

1.7.4.1

York Sun

2014-03-07 23:05 UTC #1 lore raw

PATCH v2 1/1 powerpc/t104xrdb: Update DDR initialization related settings

Quoted 13 lines · Priyanka Jain

Update following DDR related settings for T1040RDB, T1042RDB_PI
(quoted diff) +0 -4
-Correct number of chip selects to two as t1040 supports
 two Chip selects.
-Update board_specific_parameters udimm structure with settings
 derived via calibration.
-Update ddr_raw_timing sructure corresponding to DIMM.
-Set ODT to off. Typically on FSL board, ODT is set to 75 ohm,
 but on T104xRDB, on setting this , DDR instability is observed.
 Board-level debugging is in progress.
Verified the updated settings to be working fine with dual-ranked Micron, MT18KSF51272AZ-1G6 DIMM at data rate 1600MT/s.

Quoted 7 lines

Signed-off-by Priyanka Jain <[email protected]>
Signed-off-by York Sun <[email protected]>
---
Changes for v2:
Udpated description related to ODT off, Removed cpo, write_data_delay, force_2t parameters as they are not longer used.

Applied to u-boot-mpc85xx/master. Thanks.

York