*/
#include <common.h>
-#include <i2c.h>
#include <asm/fsl_ddr_sdram.h>
+#include <asm/fsl_ddr_dimm_params.h>
-static void get_spd(ddr2_spd_eeprom_t *spd, unsigned char i2c_address)
-{
- i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr2_spd_eeprom_t));
-}
-
-unsigned int fsl_ddr_get_mem_data_rate(void)
-{
- return get_ddr_freq(0);
-}
+typedef struct {
+ u32 datarate_mhz_low;
+ u32 datarate_mhz_high;
+ u32 n_ranks;
+ u32 clk_adjust;
+ u32 cpo;
+ u32 write_data_delay;
+ u32 force_2T;
+} board_specific_parameters_t;
-void fsl_ddr_get_spd(ddr2_spd_eeprom_t *ctrl_dimms_spd,
- unsigned int ctrl_num)
-{
- unsigned int i;
- unsigned int i2c_address = 0;
+/*
+ * CPO value doesn't matter if workaround for errata 111 and 134 enabled.
+ *
+ * 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.
+ */
+const board_specific_parameters_t board_specific_parameters_udimm[][20] = {
+ {
+ /*
+ * memory controller 0
+ * lo| hi| num| clk| cpo|wrdata|2T
+ * mhz| mhz|ranks|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}
+ },
- for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
- if (ctrl_num == 0 && i == 0) {
- i2c_address = SPD_EEPROM_ADDRESS1;
- }
- if (ctrl_num == 1 && i == 0) {
- i2c_address = SPD_EEPROM_ADDRESS2;
- }
- get_spd(&(ctrl_dimms_spd[i]), i2c_address);
+ {
+ /*
+ * memory controller 1
+ * lo| hi| num| clk| cpo|wrdata|2T
+ * mhz| mhz|ranks|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}
}
-}
+};
-void fsl_ddr_board_options(memctl_options_t *popts, unsigned int ctrl_num)
-{
+const board_specific_parameters_t board_specific_parameters_rdimm[][20] = {
+ {
/*
- * Factors to consider for clock adjust:
- * - number of chips on bus
- * - position of slot
- * - DDR1 vs. DDR2?
- * - ???
- *
- * This needs to be determined on a board-by-board basis.
- * 0110 3/4 cycle late
- * 0111 7/8 cycle late
+ * memory controller 0
+ * lo| hi| num| clk| cpo|wrdata|2T
+ * mhz| mhz|ranks|adjst| | delay|
*/
- popts->clk_adjust = 7;
+ { 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},
+ },
+ {
/*
- * Factors to consider for CPO:
- * - frequency
- * - ddr1 vs. ddr2
+ * memory controller 1
+ * lo| hi| num| clk| cpo|wrdata|2T
+ * mhz| mhz|ranks|adjst| | delay|
*/
- popts->cpo_override = 10;
+ { 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},
+ }
+};
- /*
- * Factors to consider for write data delay:
- * - number of DIMMs
- *
- * 1 = 1/4 clock delay
- * 2 = 1/2 clock delay
- * 3 = 3/4 clock delay
- * 4 = 1 clock delay
- * 5 = 5/4 clock delay
- * 6 = 3/2 clock delay
+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;
+ ulong ddr_freq;
+
+ if (!pdimm->n_ranks)
+ 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]);
+ }
+
+ /* 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.
*/
- popts->write_data_delay = 5;
+ 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;
+ }
+ }
+ }
+
+ /* 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;
+ }
+ pbsp++;
+ }
+
+ if (i == num_params) {
+ printf("Warning: board specific timing not found "
+ "for data rate %lu MT/s!\n", ddr_freq);
+ }
/*
* Factors to consider for half-strength driver enable:
projects / u-boot / blobdiff