diff options
Diffstat (limited to 'drivers/ddr')
| -rw-r--r-- | drivers/ddr/fsl/ctrl_regs.c | 55 | ||||
| -rw-r--r-- | drivers/ddr/fsl/options.c | 15 |
2 files changed, 63 insertions, 7 deletions
diff --git a/drivers/ddr/fsl/ctrl_regs.c b/drivers/ddr/fsl/ctrl_regs.c index 0bfcd34..9073917 100644 --- a/drivers/ddr/fsl/ctrl_regs.c +++ b/drivers/ddr/fsl/ctrl_regs.c @@ -895,11 +895,15 @@ static void set_ddr_sdram_cfg_2(const unsigned int ctrl_num, slow = get_ddr_freq(ctrl_num) < 1249000000; #endif - if (popts->registered_dimm_en) { + if (popts->registered_dimm_en) rcw_en = 1; - ap_en = popts->ap_en; - } else { + + /* DDR4 can have address parity for UDIMM and discrete */ + if ((CONFIG_FSL_SDRAM_TYPE != SDRAM_TYPE_DDR4) && + (!popts->registered_dimm_en)) { ap_en = 0; + } else { + ap_en = popts->ap_en; } x4_en = popts->x4_en ? 1 : 0; @@ -1135,6 +1139,7 @@ static void set_ddr_sdram_mode_9(fsl_ddr_cfg_regs_t *ddr, unsigned short esdmode5; /* Extended SDRAM mode 5 */ int rtt_park = 0; bool four_cs = false; + const unsigned int mclk_ps = get_memory_clk_period_ps(0); #if CONFIG_CHIP_SELECTS_PER_CTRL == 4 if ((ddr->cs[0].config & SDRAM_CS_CONFIG_EN) && @@ -1150,6 +1155,19 @@ static void set_ddr_sdram_mode_9(fsl_ddr_cfg_regs_t *ddr, esdmode5 = 0x00000400; /* Data mask enabled */ } + /* set command/address parity latency */ + if (ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) { + if (mclk_ps >= 935) { + /* for DDR4-1600/1866/2133 */ + esdmode5 |= DDR_MR5_CA_PARITY_LAT_4_CLK; + } else if (mclk_ps >= 833) { + /* for DDR4-2400 */ + esdmode5 |= DDR_MR5_CA_PARITY_LAT_5_CLK; + } else { + printf("parity: mclk_ps = %d not supported\n", mclk_ps); + } + } + ddr->ddr_sdram_mode_9 = (0 | ((esdmode4 & 0xffff) << 16) | ((esdmode5 & 0xffff) << 0) @@ -1170,6 +1188,20 @@ static void set_ddr_sdram_mode_9(fsl_ddr_cfg_regs_t *ddr, } else { esdmode5 = 0x00000400; } + + if (ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) { + if (mclk_ps >= 935) { + /* for DDR4-1600/1866/2133 */ + esdmode5 |= DDR_MR5_CA_PARITY_LAT_4_CLK; + } else if (mclk_ps >= 833) { + /* for DDR4-2400 */ + esdmode5 |= DDR_MR5_CA_PARITY_LAT_5_CLK; + } else { + printf("parity: mclk_ps = %d not supported\n", + mclk_ps); + } + } + switch (i) { case 1: ddr->ddr_sdram_mode_11 = (0 @@ -1925,12 +1957,25 @@ static void set_timing_cfg_7(const unsigned int ctrl_num, const common_timing_params_t *common_dimm) { unsigned int txpr, tcksre, tcksrx; - unsigned int cke_rst, cksre, cksrx, par_lat, cs_to_cmd; + unsigned int cke_rst, cksre, cksrx, par_lat = 0, cs_to_cmd; + const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num); txpr = max(5U, picos_to_mclk(ctrl_num, common_dimm->trfc1_ps + 10000)); tcksre = max(5U, picos_to_mclk(ctrl_num, 10000)); tcksrx = max(5U, picos_to_mclk(ctrl_num, 10000)); - par_lat = 0; + + if (ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) { + if (mclk_ps >= 935) { + /* parity latency 4 clocks in case of 1600/1866/2133 */ + par_lat = 4; + } else if (mclk_ps >= 833) { + /* parity latency 5 clocks for DDR4-2400 */ + par_lat = 5; + } else { + printf("parity: mclk_ps = %d not supported\n", mclk_ps); + } + } + cs_to_cmd = 0; if (txpr <= 200) diff --git a/drivers/ddr/fsl/options.c b/drivers/ddr/fsl/options.c index 791d644..d0075ff 100644 --- a/drivers/ddr/fsl/options.c +++ b/drivers/ddr/fsl/options.c @@ -1002,8 +1002,19 @@ unsigned int populate_memctl_options(const common_timing_params_t *common_dimm, popts->twot_en = 0; popts->threet_en = 0; - /* for RDIMM, address parity enable */ - popts->ap_en = 1; + /* for RDIMM and DDR4 UDIMM/discrete memory, address parity enable */ + if (popts->registered_dimm_en) + popts->ap_en = 1; /* 0 = disable, 1 = enable */ + else + popts->ap_en = 0; /* disabled for DDR4 UDIMM/discrete default */ + + if (hwconfig_sub_f("fsl_ddr", "parity", buf)) { + if (hwconfig_subarg_cmp_f("fsl_ddr", "parity", "on", buf)) { + if (popts->registered_dimm_en || + (CONFIG_FSL_SDRAM_TYPE == SDRAM_TYPE_DDR4)) + popts->ap_en = 1; + } + } /* * BSTTOPRE precharge interval |