[U-Boot] [PATCH] t2080qds/ddr: update ddr parameters

Shengzhou Liu
2014-01-06T09:26:22Z

- Optimize UDIMM parameters for whole range from 1500MT/s to 2140MT/s.
- Remove unused patameters: 'cpo', 'wrdata delay', '2T', which are
unrelated to DDR3/3L.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
---
board/freescale/t2080qds/ddr.c | 12 ++------
board/freescale/t2080qds/ddr.h | 65 +++++++++++++++++-------------------------
2 files changed, 28 insertions(+), 49 deletions(-)

diff --git a/board/freescale/t2080qds/ddr.c b/board/freescale/t2080qds/ddr.c
index 9f6c9c4..b4def3c 100644
--- a/board/freescale/t2080qds/ddr.c
+++ b/board/freescale/t2080qds/ddr.c
@@ -24,7 +24,7 @@ void fsl_ddr_board_options(memctl_options_t *popts,
const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
ulong ddr_freq;

- if (ctrl_num > 2) {
+ if (ctrl_num > 1) {
printf("Not supported controller number %d\n", ctrl_num);
return;
}
@@ -40,8 +40,7 @@ void fsl_ddr_board_options(memctl_options_t *popts,
else
pbsp = udimms[0];

-
- /* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
+ /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
* freqency and n_banks specified in board_specific_parameters table.
*/
ddr_freq = get_ddr_freq(0) / 1000000;
@@ -49,14 +48,10 @@ 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;
@@ -69,13 +64,10 @@ 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");
}
diff --git a/board/freescale/t2080qds/ddr.h b/board/freescale/t2080qds/ddr.h
index 964eaad..9fc879a 100644
--- a/board/freescale/t2080qds/ddr.h
+++ b/board/freescale/t2080qds/ddr.h
@@ -14,9 +14,6 @@ struct board_specific_parameters {
u32 wrlvl_start;
u32 wrlvl_ctl_2;
u32 wrlvl_ctl_3;
- u32 cpo;
- u32 write_data_delay;
- u32 force_2t;
};

/*
@@ -28,58 +25,48 @@ 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 | wrlvl |
+ * ranks| mhz| GB |adjst| start | ctl2 | ctl3 |
*/
- {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, 1900, 0, 4, 8, 0x090a0b0e, 0x0f11120c, 0xff, 2, 0},
- {2, 2140, 0, 4, 8, 0x090a0b0e, 0x0f11120c, 0xff, 2, 0},
- {1, 1350, 0, 5, 8, 0x0809090b, 0x0c0c0d0a, 0xff, 2, 0},
- {1, 1700, 0, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
- {1, 1800, 2, 5, 6, 0x06070709, 0x110a0b08, 0xff, 2, 0},
- {1, 1866, 2, 4, 6, 0x06060708, 0x09090a07, 0xff, 2, 0},
- {1, 1900, 2, 4, 6, 0x06060708, 0x09090a07, 0xff, 2, 0},
- {1, 2000, 2, 4, 8, 0x090a0b0d, 0x0e0f110b, 0xff, 2, 0},
- {1, 2133, 2, 4, 8, 0x090a0b0d, 0x0e0f110b, 0xff, 2, 0},
+ {2, 1200, 2, 5, 7, 0x0808090a, 0x0b0c0c0a},
+ {2, 1500, 2, 5, 6, 0x07070809, 0x0a0b0b09},
+ {2, 1600, 2, 5, 8, 0x090b0b0d, 0x0d0e0f0b},
+ {2, 1700, 2, 4, 7, 0x080a0a0c, 0x0c0d0e0a},
+ {2, 1900, 2, 5, 9, 0x0a0b0c0e, 0x0f10120c},
+ {2, 2140, 2, 4, 8, 0x090a0b0d, 0x0e0f110b},
+ {1, 1200, 2, 5, 7, 0x0808090a, 0x0b0c0c0a},
+ {1, 1500, 2, 5, 6, 0x07070809, 0x0a0b0b09},
+ {1, 1600, 2, 5, 8, 0x090b0b0d, 0x0d0e0f0b},
+ {1, 1700, 2, 4, 7, 0x080a0a0c, 0x0c0d0e0a},
+ {1, 1900, 2, 5, 9, 0x0a0b0c0e, 0x0f10120c},
+ {1, 2140, 2, 4, 8, 0x090a0b0d, 0x0e0f110b},
{}
};

static const struct board_specific_parameters rdimm0[] = {
/*
* 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 | wrlvl |
+ * ranks| mhz| GB |adjst| start | ctl2 | ctl3 |
*/
- {4, 1350, 0, 5, 9, 0x08070605, 0x06070806, 0xff, 2, 0},
- {4, 1666, 0, 5, 11, 0x0a080706, 0x07090906, 0xff, 2, 0},
- {4, 2140, 0, 5, 12, 0x0b090807, 0x080a0b07, 0xff, 2, 0},
- {2, 1350, 0, 5, 9, 0x08070605, 0x06070806, 0xff, 2, 0},
- {2, 1666, 0, 5, 11, 0x0a090806, 0x08090a06, 0xff, 2, 0},
- {2, 2140, 0, 5, 12, 0x0b090807, 0x080a0b07, 0xff, 2, 0},
- {1, 1350, 0, 5, 9, 0x08070605, 0x06070806, 0xff, 2, 0},
- {1, 1666, 0, 5, 11, 0x0a090806, 0x08090a06, 0xff, 2, 0},
- {1, 2140, 0, 4, 12, 0x0b090807, 0x080a0b07, 0xff, 2, 0},
+ /* TODO: need tuning these parameters if RDIMM is used */
+ {4, 1350, 0, 5, 9, 0x08070605, 0x06070806},
+ {4, 1666, 0, 5, 11, 0x0a080706, 0x07090906},
+ {4, 2140, 0, 5, 12, 0x0b090807, 0x080a0b07},
+ {2, 1350, 0, 5, 9, 0x08070605, 0x06070806},
+ {2, 1666, 0, 5, 11, 0x0a090806, 0x08090a06},
+ {2, 2140, 0, 5, 12, 0x0b090807, 0x080a0b07},
+ {1, 1350, 0, 5, 9, 0x08070605, 0x06070806},
+ {1, 1666, 0, 5, 11, 0x0a090806, 0x08090a06},
+ {1, 2140, 0, 4, 12, 0x0b090807, 0x080a0b07},
{}
};

-/*
- * The three slots have slightly different timing. The center values are good
- * for all slots. We use identical speed tables for them. In future use, if
- * DIMMs require separated tables, make more entries as needed.
- */
static const struct board_specific_parameters *udimms[] = {
udimm0,
};

-/*
- * The three slots have slightly different timing. See comments above.
- */
static const struct board_specific_parameters *rdimms[] = {
rdimm0,
};
-
-
#endif
--
1.8.0