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-rw-r--r--board/freescale/mpc8572ds/ddr.c203
1 files changed, 102 insertions, 101 deletions
diff --git a/board/freescale/mpc8572ds/ddr.c b/board/freescale/mpc8572ds/ddr.c
index adcbd58545..a7ff668b1b 100644
--- a/board/freescale/mpc8572ds/ddr.c
+++ b/board/freescale/mpc8572ds/ddr.c
@@ -11,155 +11,156 @@
#include <asm/fsl_ddr_sdram.h>
#include <asm/fsl_ddr_dimm_params.h>
-typedef struct {
- u32 datarate_mhz_low;
- u32 datarate_mhz_high;
+struct board_specific_parameters {
u32 n_ranks;
+ u32 datarate_mhz_high;
u32 clk_adjust;
u32 cpo;
u32 write_data_delay;
u32 force_2T;
-} board_specific_parameters_t;
+};
/*
- * CPO value doesn't matter if workaround for errata 111 and 134 enabled.
+ * This table contains all valid speeds we want to override with board
+ * specific parameters. datarate_mhz_high values need to be in ascending order
+ * for each n_ranks group.
*
* For DDR2 DIMM, all combinations of clk_adjust and write_data_delay have been
* tested. For RDIMM, clk_adjust = 4 and write_data_delay = 3 is optimized for
* all clocks from 400MT/s to 800MT/s, verified with Kingston KVR800D2D8P6/2G.
* For UDIMM, clk_adjust = 8 and write_delay = 5 is optimized for all clocks
* from 400MT/s to 800MT/s, verified with Micron MT18HTF25672AY-800E1.
+ *
+ * CPO value doesn't matter if workaround for errata 111 and 134 enabled.
*/
-const board_specific_parameters_t board_specific_parameters_udimm[][20] = {
- {
+static const struct board_specific_parameters udimm0[] = {
/*
- * memory controller 0
- * lo| hi| num| clk| cpo|wrdata|2T
- * mhz| mhz|ranks|adjst| | delay|
+ * memory controller 0
+ * num| hi| clk| cpo|wrdata|2T
+ * ranks| mhz|adjst| | delay|
*/
- { 0, 333, 2, 8, 7, 5, 0},
- {334, 400, 2, 8, 9, 5, 0},
- {401, 549, 2, 8, 11, 5, 0},
- {550, 680, 2, 8, 10, 5, 0},
- {681, 850, 2, 8, 12, 5, 1},
- { 0, 333, 1, 6, 7, 3, 0},
- {334, 400, 1, 6, 9, 3, 0},
- {401, 549, 1, 6, 11, 3, 0},
- {550, 680, 1, 1, 10, 5, 0},
- {681, 850, 1, 1, 12, 5, 0}
- },
+ {2, 333, 8, 7, 5, 0},
+ {2, 400, 8, 9, 5, 0},
+ {2, 549, 8, 11, 5, 0},
+ {2, 680, 8, 10, 5, 0},
+ {2, 850, 8, 12, 5, 1},
+ {1, 333, 6, 7, 3, 0},
+ {1, 400, 6, 9, 3, 0},
+ {1, 549, 6, 11, 3, 0},
+ {1, 680, 1, 10, 5, 0},
+ {1, 850, 1, 12, 5, 0},
+ {}
+};
- {
+static const struct board_specific_parameters udimm1[] = {
/*
- * memory controller 1
- * lo| hi| num| clk| cpo|wrdata|2T
- * mhz| mhz|ranks|adjst| | delay|
+ * memory controller 1
+ * num| hi| clk| cpo|wrdata|2T
+ * ranks| mhz|adjst| | delay|
*/
- { 0, 333, 2, 8, 7, 5, 0},
- {334, 400, 2, 8, 9, 5, 0},
- {401, 549, 2, 8, 11, 5, 0},
- {550, 680, 2, 8, 11, 5, 0},
- {681, 850, 2, 8, 13, 5, 1},
- { 0, 333, 1, 6, 7, 3, 0},
- {334, 400, 1, 6, 9, 3, 0},
- {401, 549, 1, 6, 11, 3, 0},
- {550, 680, 1, 1, 11, 6, 0},
- {681, 850, 1, 1, 13, 6, 0}
- }
+ {2, 333, 8, 7, 5, 0},
+ {2, 400, 8, 9, 5, 0},
+ {2, 549, 8, 11, 5, 0},
+ {2, 680, 8, 11, 5, 0},
+ {2, 850, 8, 13, 5, 1},
+ {1, 333, 6, 7, 3, 0},
+ {1, 400, 6, 9, 3, 0},
+ {1, 549, 6, 11, 3, 0},
+ {1, 680, 1, 11, 6, 0},
+ {1, 850, 1, 13, 6, 0},
+ {}
+};
+
+static const struct board_specific_parameters *udimms[] = {
+ udimm0,
+ udimm1,
};
-const board_specific_parameters_t board_specific_parameters_rdimm[][20] = {
- {
+static const struct board_specific_parameters rdimm0[] = {
/*
- * memory controller 0
- * lo| hi| num| clk| cpo|wrdata|2T
- * mhz| mhz|ranks|adjst| | delay|
+ * memory controller 0
+ * num| hi| clk| cpo|wrdata|2T
+ * ranks| mhz|adjst| | delay|
*/
- { 0, 333, 2, 4, 7, 3, 0},
- {334, 400, 2, 4, 9, 3, 0},
- {401, 549, 2, 4, 11, 3, 0},
- {550, 680, 2, 4, 10, 3, 0},
- {681, 850, 2, 4, 12, 3, 1},
- },
+ {2, 333, 4, 7, 3, 0},
+ {2, 400, 4, 9, 3, 0},
+ {2, 549, 4, 11, 3, 0},
+ {2, 680, 4, 10, 3, 0},
+ {2, 850, 4, 12, 3, 1},
+ {}
+};
- {
+static const struct board_specific_parameters rdimm1[] = {
/*
- * memory controller 1
- * lo| hi| num| clk| cpo|wrdata|2T
- * mhz| mhz|ranks|adjst| | delay|
+ * memory controller 1
+ * num| hi| clk| cpo|wrdata|2T
+ * ranks| mhz|adjst| | delay|
*/
- { 0, 333, 2, 4, 7, 3, 0},
- {334, 400, 2, 4, 9, 3, 0},
- {401, 549, 2, 4, 11, 3, 0},
- {550, 680, 2, 4, 11, 3, 0},
- {681, 850, 2, 4, 13, 3, 1},
- }
+ {2, 333, 4, 7, 3, 0},
+ {2, 400, 4, 9, 3, 0},
+ {2, 549, 4, 11, 3, 0},
+ {2, 680, 4, 11, 3, 0},
+ {2, 850, 4, 13, 3, 1},
+ {}
+};
+
+static const struct board_specific_parameters *rdimms[] = {
+ rdimm0,
+ rdimm1,
};
void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
- const board_specific_parameters_t *pbsp;
- u32 num_params;
- u32 i;
+ const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
ulong ddr_freq;
- if (!pdimm->n_ranks)
+ if (ctrl_num > 1) {
+ printf("Wrong parameter for controller number %d", ctrl_num);
return;
-
- if (popts->registered_dimm_en) {
- pbsp = &(board_specific_parameters_rdimm[ctrl_num][0]);
- num_params = sizeof(board_specific_parameters_rdimm[ctrl_num]) /
- sizeof(board_specific_parameters_rdimm[0][0]);
- } else {
- pbsp = &(board_specific_parameters_udimm[ctrl_num][0]);
- num_params = sizeof(board_specific_parameters_udimm[ctrl_num]) /
- sizeof(board_specific_parameters_udimm[0][0]);
}
+ if (!pdimm->n_ranks)
+ return;
- /* set odt_rd_cfg and odt_wr_cfg. If the there is only one dimm in
- * that controller, set odt_wr_cfg to 4 for CS0, and 0 to CS1. If
- * there are two dimms in the controller, set odt_rd_cfg to 3 and
- * odt_wr_cfg to 3 for the even CS, 0 for the odd CS.
- */
- for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
- if (i&1) { /* odd CS */
- popts->cs_local_opts[i].odt_rd_cfg = 0;
- popts->cs_local_opts[i].odt_wr_cfg = 0;
- } else { /* even CS */
- if (CONFIG_DIMM_SLOTS_PER_CTLR == 1) {
- popts->cs_local_opts[i].odt_rd_cfg = 0;
- popts->cs_local_opts[i].odt_wr_cfg = 4;
- } else if (CONFIG_DIMM_SLOTS_PER_CTLR == 2) {
- popts->cs_local_opts[i].odt_rd_cfg = 3;
- popts->cs_local_opts[i].odt_wr_cfg = 3;
- }
- }
- }
+ if (popts->registered_dimm_en)
+ pbsp = rdimms[ctrl_num];
+ else
+ pbsp = udimms[ctrl_num];
/* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
* freqency and n_banks specified in board_specific_parameters table.
*/
ddr_freq = get_ddr_freq(0) / 1000000;
- for (i = 0; i < num_params; i++) {
- if (ddr_freq >= pbsp->datarate_mhz_low &&
- ddr_freq <= pbsp->datarate_mhz_high &&
- pdimm->n_ranks == pbsp->n_ranks) {
- popts->clk_adjust = pbsp->clk_adjust;
- popts->cpo_override = pbsp->cpo;
- popts->write_data_delay = pbsp->write_data_delay;
- popts->twoT_en = pbsp->force_2T;
- break;
+ while (pbsp->datarate_mhz_high) {
+ if (pbsp->n_ranks == pdimm->n_ranks) {
+ if (ddr_freq <= pbsp->datarate_mhz_high) {
+ popts->clk_adjust = pbsp->clk_adjust;
+ popts->cpo_override = pbsp->cpo;
+ popts->write_data_delay =
+ pbsp->write_data_delay;
+ popts->twoT_en = pbsp->force_2T;
+ goto found;
+ }
+ pbsp_highest = pbsp;
}
pbsp++;
}
- if (i == num_params) {
- printf("Warning: board specific timing not found "
- "for data rate %lu MT/s!\n", ddr_freq);
+ if (pbsp_highest) {
+ printf("Error: board specific timing not found "
+ "for data rate %lu MT/s!\n"
+ "Trying to use the highest speed (%u) parameters\n",
+ ddr_freq, pbsp_highest->datarate_mhz_high);
+ popts->clk_adjust = pbsp->clk_adjust;
+ popts->cpo_override = pbsp->cpo;
+ popts->write_data_delay = pbsp->write_data_delay;
+ popts->twoT_en = pbsp->force_2T;
+ } else {
+ panic("DIMM is not supported by this board");
}
+found:
/*
* Factors to consider for half-strength driver enable:
* - number of DIMMs installed
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