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authorYork Sun <yorksun@freescale.com>2013-03-25 07:33:19 +0000
committerAndy Fleming <afleming@freescale.com>2013-05-14 16:00:27 -0500
commit054dfd9b9d9fedac87bffdbde72683e8e678eecc (patch)
tree4bc2a6de51e662a1234814a7a1ce6622aaa1f7d0
parentf9772444a0fe326f7c986884df6c0b39d19fef06 (diff)
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powerpc/t4240qds: Update DDR timing table
Update the timing table to support more rank density, based on the theory that similar density DIMMs have similar clock adjust and write level start timing. Update the timing for 1600 and 1866 MT/s. Tested with Micron MT18JSF1G72AZ-1G9E1 DIMMs, iDIMM M3CN-4GMJ3C0C-M92. Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
-rw-r--r--board/freescale/t4qds/ddr.c56
1 files changed, 34 insertions, 22 deletions
diff --git a/board/freescale/t4qds/ddr.c b/board/freescale/t4qds/ddr.c
index 692616a..058d625 100644
--- a/board/freescale/t4qds/ddr.c
+++ b/board/freescale/t4qds/ddr.c
@@ -19,6 +19,7 @@ DECLARE_GLOBAL_DATA_PTR;
struct board_specific_parameters {
u32 n_ranks;
u32 datarate_mhz_high;
+ u32 rank_gb;
u32 clk_adjust;
u32 wrlvl_start;
u32 wrlvl_ctl_2;
@@ -36,16 +37,19 @@ struct board_specific_parameters {
static const struct board_specific_parameters udimm0[] = {
/*
* memory controller 0
- * num| hi| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T
- * ranks| mhz|adjst| start | ctl2 | ctl3 | |delay |
+ * num| hi| rank| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T
+ * ranks| mhz| GB |adjst| start | ctl2 | ctl3 | |delay |
*/
- {2, 1350, 5, 7, 0x0809090b, 0x0c0c0d09, 0xff, 2, 0},
- {2, 1666, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
- {2, 2140, 5, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0},
- {1, 1350, 5, 8, 0x0809090b, 0x0c0c0d0a, 0xff, 2, 0},
- {1, 1700, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
- {1, 1900, 4, 8, 0x080a0a0c, 0x0e0e0f0a, 0xff, 2, 0},
- {1, 2140, 4, 8, 0x090a0b0c, 0x0e0f100b, 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, 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, 1900, 0, 4, 8, 0x080a0a0c, 0x0e0e0f0a, 0xff, 2, 0},
+ {1, 2140, 0, 4, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0},
{}
};
@@ -61,19 +65,19 @@ static const struct board_specific_parameters *udimms[] = {
static const struct board_specific_parameters rdimm0[] = {
/*
* memory controller 0
- * num| hi| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T
- * ranks| mhz|adjst| start | ctl2 | ctl3 | |delay |
+ * num| hi| rank| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T
+ * ranks| mhz| GB |adjst| start | ctl2 | ctl3 | |delay |
*/
- {4, 1350, 5, 9, 0x08070605, 0x07080805, 0xff, 2, 0},
- {4, 1666, 5, 8, 0x08070605, 0x07080805, 0xff, 2, 0},
- {4, 2140, 5, 8, 0x08070605, 0x07081805, 0xff, 2, 0},
- {2, 1350, 5, 7, 0x0809090b, 0x0c0c0d09, 0xff, 2, 0},
- {2, 1666, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
- {2, 2140, 5, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0},
- {1, 1350, 5, 8, 0x0809090b, 0x0c0c0d0a, 0xff, 2, 0},
- {1, 1700, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
- {1, 1900, 4, 8, 0x080a0a0c, 0x0e0e0f0a, 0xff, 2, 0},
- {1, 2140, 4, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0},
+ {4, 1350, 0, 5, 9, 0x08070605, 0x07080805, 0xff, 2, 0},
+ {4, 1666, 0, 5, 8, 0x08070605, 0x07080805, 0xff, 2, 0},
+ {4, 2140, 0, 5, 8, 0x08070605, 0x07081805, 0xff, 2, 0},
+ {2, 1350, 0, 5, 7, 0x0809090b, 0x0c0c0d09, 0xff, 2, 0},
+ {2, 1666, 0, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
+ {2, 2140, 0, 5, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0},
+ {1, 1350, 0, 5, 8, 0x0809090b, 0x0c0c0d0a, 0xff, 2, 0},
+ {1, 1700, 0, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0},
+ {1, 1900, 0, 4, 8, 0x080a0a0c, 0x0e0e0f0a, 0xff, 2, 0},
+ {1, 2140, 0, 4, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0},
{}
};
@@ -113,7 +117,8 @@ void fsl_ddr_board_options(memctl_options_t *popts,
*/
ddr_freq = get_ddr_freq(0) / 1000000;
while (pbsp->datarate_mhz_high) {
- if (pbsp->n_ranks == pdimm->n_ranks) {
+ 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 =
@@ -146,6 +151,13 @@ void fsl_ddr_board_options(memctl_options_t *popts,
panic("DIMM is not supported by this board");
}
found:
+ debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n"
+ "\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, "
+ "wrlvl_ctrl_3 0x%x\n",
+ pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb,
+ pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2,
+ pbsp->wrlvl_ctl_3);
+
/*
* Factors to consider for half-strength driver enable:
* - number of DIMMs installed