* Add board specific parameter table to choose correct cpo, clk_adjust, write_data_delay, 2T based on board ddr frequency and n_ranks.
* Set odt_rd_cfg and odt_wr_cfg based on the dimm# and CS#.
* Set memory controller interleaving mode to bank interleaving, and disable bank(chip select) interleaving mode by default, because the default on-board DDR DIMMs are 2x512MB single-rank.
* Change CONFIG_ICS307_REFCLK_HZ from 33333333 to 33333000.
Signed-off-by: James Yang James.Yang@freescale.com Signed-off-by: Haiying Wang Haiying.Wang@freescale.com --- board/freescale/mpc8572ds/ddr.c | 123 ++++++++++++++++++++++++++++++--------- include/configs/MPC8572DS.h | 3 +- 2 files changed, 97 insertions(+), 29 deletions(-)
diff --git a/board/freescale/mpc8572ds/ddr.c b/board/freescale/mpc8572ds/ddr.c index 435893a..171a8d5 100644 --- a/board/freescale/mpc8572ds/ddr.c +++ b/board/freescale/mpc8572ds/ddr.c @@ -39,42 +39,109 @@ void fsl_ddr_get_spd(ddr2_spd_eeprom_t *ctrl_dimms_spd, } }
+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; + +/* ranges for parameters: + * wr_data_delay = 0-6 + * clk adjust = 0-8 + * cpo 2-0x1E (30) + */ + + +/* XXX: these values need to be checked for all interleaving modes. */ +/* XXX: No reliable dual-rank 800 MHz setting has been found. It may + * seem reliable, but errors will appear when memory intensive + * program is run. */ +/* XXX: Single rank at 800 MHz is OK. */ +const board_specific_parameters_t board_specific_parameters[][20] = { + { + /* memory controller 0 */ + /* lo| hi| num| clk| cpo|wrdata|2T */ + /* mhz| mhz|ranks|adjst| | delay| */ + { 0, 333, 2, 6, 7, 3, 0}, + {334, 400, 2, 6, 9, 3, 0}, + {401, 549, 2, 6, 11, 3, 0}, + {550, 680, 2, 1, 10, 5, 0}, + {681, 850, 2, 1, 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} + }, + + { + /* memory controller 1 */ + /* lo| hi| num| clk| cpo|wrdata|2T */ + /* mhz| mhz|ranks|adjst| | delay| */ + { 0, 333, 2, 6, 7, 3, 0}, + {334, 400, 2, 6, 9, 3, 0}, + {401, 549, 2, 6, 11, 3, 0}, + {550, 680, 2, 1, 11, 6, 0}, + {681, 850, 2, 1, 13, 6, 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, dimm_params_t *pdimm, unsigned int ctrl_num) { - /* - * 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 - */ - popts->clk_adjust = 7; + const board_specific_parameters_t *pbsp = + &(board_specific_parameters[ctrl_num][0]); + const char *p; + u32 num_params = sizeof(board_specific_parameters[ctrl_num]) / + sizeof(board_specific_parameters[0][0]); + u32 i; + ulong ddr_freq;
- /* - * Factors to consider for CPO: - * - frequency - * - ddr1 vs. ddr2 + /* 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->cpo_override = 10; + 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; + } + } + }
- /* - * 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 + /* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr + * freqency and n_banks specified in board_specific_parameters table. */ - popts->write_data_delay = 5; + 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; + } + pbsp++; + }
/* * Factors to consider for half-strength driver enable: diff --git a/include/configs/MPC8572DS.h b/include/configs/MPC8572DS.h index d7e3a88..82c2334 100644 --- a/include/configs/MPC8572DS.h +++ b/include/configs/MPC8572DS.h @@ -61,7 +61,7 @@ extern unsigned long get_board_ddr_clk(unsigned long dummy); #endif #define CONFIG_SYS_CLK_FREQ get_board_sys_clk(0) /* sysclk for MPC85xx */ #define CONFIG_DDR_CLK_FREQ get_board_ddr_clk(0) /* ddrclk for MPC85xx */ -#define CONFIG_ICS307_REFCLK_HZ 33333333 /* ICS307 clock chip ref freq */ +#define CONFIG_ICS307_REFCLK_HZ 33333000 /* ICS307 clock chip ref freq */ #define CONFIG_GET_CLK_FROM_ICS307 /* decode sysclk and ddrclk freq from ICS307 instead of switches */
@@ -532,6 +532,7 @@ extern unsigned long get_board_ddr_clk(unsigned long dummy); #define CONFIG_BAUDRATE 115200
#define CONFIG_EXTRA_ENV_SETTINGS \ + "memctl_intlv_ctl=2\0" \ "netdev=eth0\0" \ "uboot=" MK_STR(CONFIG_UBOOTPATH) "\0" \ "tftpflash=tftpboot $loadaddr $uboot; " \