Add support of command/address parity for DDR4 UDIMM or discrete memory. It requires to configurate corresponding MR5[2:0] and TIMING_CFG_7[PAR_LAT]. Parity can be turned on/off by hwconfig, e.g. hwconfig=fsl_ddr:parity=on.
Signed-off-by: Shengzhou Liu <[email protected]> --- doc/README.fsl-ddr | 8 +++++++ drivers/ddr/fsl/ctrl_regs.c | 52 +++++++++++++++++++++++++++++++++++++++------ drivers/ddr/fsl/options.c | 12 +++++++++-- include/fsl_ddr_sdram.h | 11 +++++++++- 4 files changed, 73 insertions(+), 10 deletions(-) diff --git a/doc/README.fsl-ddr b/doc/README.fsl-ddr index cd71ec8..80f91d3 100644 --- a/doc/README.fsl-ddr +++ b/doc/README.fsl-ddr @@ -143,6 +143,14 @@ platform hwconfig=fsl_ddr:addr_hash=true,ctlr_intlv=cacheline,bank_intlv=cs0_cs1_cs2_cs3,ecc=on + +Memory address parity on/off +============================ +address parity can be turned on/off by hwconfig, it's disabled by default. +Syntax is: +hwconfig=fsl_ddr:parity=on + + Table for dynamic ODT for DDR3 ============================== For single-slot system with quad-rank DIMM and dual-slot system, dynamic ODT may diff --git a/drivers/ddr/fsl/ctrl_regs.c b/drivers/ddr/fsl/ctrl_regs.c index 0bfcd34..1f5b9fc 100644 --- a/drivers/ddr/fsl/ctrl_regs.c +++ b/drivers/ddr/fsl/ctrl_regs.c @@ -895,12 +895,10 @@ 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) { + ap_en = popts->ap_en; + + if (popts->registered_dimm_en) rcw_en = 1; - ap_en = popts->ap_en; - } else { - ap_en = 0; - } x4_en = popts->x4_en ? 1 : 0; @@ -1135,6 +1133,7 @@ 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 +1149,19 @@ 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 +1182,19 @@ 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: the speed reserved\n"); + } + } + switch (i) { case 1: ddr->ddr_sdram_mode_11 = (0 @@ -1925,12 +1950,25 @@ 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..9ea80af 100644 --- a/drivers/ddr/fsl/options.c +++ b/drivers/ddr/fsl/options.c @@ -1002,8 +1002,16 @@ 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 */ + popts->ap_en = 0; /* 0 = disable, 1 = enable */ + + 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 diff --git a/include/fsl_ddr_sdram.h b/include/fsl_ddr_sdram.h index 3699c04..cf316a4 100644 --- a/include/fsl_ddr_sdram.h +++ b/include/fsl_ddr_sdram.h @@ -123,6 +123,7 @@ typedef struct ddr4_spd_eeprom_s generic_spd_eeprom_t; #define SDRAM_CFG2_FRC_SR 0x80000000 #define SDRAM_CFG2_D_INIT 0x00000010 +#define SDRAM_CFG2_AP_EN 0x00000020 #define SDRAM_CFG2_ODT_CFG_MASK 0x00600000 #define SDRAM_CFG2_ODT_NEVER 0 #define SDRAM_CFG2_ODT_ONLY_WRITE 1 @@ -177,6 +178,14 @@ typedef struct ddr4_spd_eeprom_s generic_spd_eeprom_t; #define DDR_CDR2_VREF_TRAIN_EN 0x00000080 #define DDR_CDR2_VREF_RANGE_2 0x00000040 +/* DDR ERR_DISABLE */ +#define DDR_ERR_DISABLE_APED (1 << 8) /* Address parity error disable */ + +/* Mode Registers */ +#define DDR_MR5_CA_PARITY_LAT_4_CLK 0x1 /* for DDR4-1600/1866/2133 */ +#define DDR_MR5_CA_PARITY_LAT_5_CLK 0x2 /* for DDR4-2400 */ + + #if (defined(CONFIG_SYS_FSL_DDR_VER) && \ (CONFIG_SYS_FSL_DDR_VER >= FSL_DDR_VER_4_7)) #ifdef CONFIG_SYS_FSL_DDR3L @@ -343,7 +352,7 @@ typedef struct memctl_options_s { /* mirrior DIMMs for DDR3 */ unsigned int mirrored_dimm; unsigned int quad_rank_present; - unsigned int ap_en; /* address parity enable for RDIMM */ + unsigned int ap_en; /* address parity enable for RDIMM/DDR4-UDIMM */ unsigned int x4_en; /* enable x4 devices */ /* Global Timing Parameters */ -- 2.1.0.27.g96db324 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
