[U-Boot] [PATCH v3 1/3] drivers/ddr/fsl: Fix DDR4 RDIMM support
York Sun
york.sun at nxp.com
Wed Jan 24 19:04:28 UTC 2018
For DDR4, command/address delay in mode registers and parity latency
in timing config register are only needed for UDIMMs, but not RDIMMs.
Add additional register rcw_3 for DDR4 RDIMM. Fix mirrored bit for
dual rank RDIMMs. Set sdram_cfg_3[DIS_MRS_PAR] for RDIMMs. Use
hexadecimal format for printing RCW (register control word) registers.
Signed-off-by: York Sun <york.sun at nxp.com>
---
Changes in v3: None
Changes in v2: None
drivers/ddr/fsl/ctrl_regs.c | 32 +++++++++++++++++++++++++-------
drivers/ddr/fsl/ddr4_dimm_params.c | 2 ++
drivers/ddr/fsl/interactive.c | 9 +++++++--
include/fsl_ddr_sdram.h | 1 +
4 files changed, 35 insertions(+), 9 deletions(-)
diff --git a/drivers/ddr/fsl/ctrl_regs.c b/drivers/ddr/fsl/ctrl_regs.c
index c0ee858..4a1f397 100644
--- a/drivers/ddr/fsl/ctrl_regs.c
+++ b/drivers/ddr/fsl/ctrl_regs.c
@@ -732,6 +732,7 @@ static void set_ddr_sdram_rcw(fsl_ddr_cfg_regs_t *ddr,
if (popts->rcw_override) {
ddr->ddr_sdram_rcw_1 = popts->rcw_1;
ddr->ddr_sdram_rcw_2 = popts->rcw_2;
+ ddr->ddr_sdram_rcw_3 = popts->rcw_3;
} else {
ddr->ddr_sdram_rcw_1 =
common_dimm->rcw[0] << 28 | \
@@ -752,8 +753,12 @@ static void set_ddr_sdram_rcw(fsl_ddr_cfg_regs_t *ddr,
common_dimm->rcw[14] << 4 | \
common_dimm->rcw[15];
}
- debug("FSLDDR: ddr_sdram_rcw_1 = 0x%08x\n", ddr->ddr_sdram_rcw_1);
- debug("FSLDDR: ddr_sdram_rcw_2 = 0x%08x\n", ddr->ddr_sdram_rcw_2);
+ debug("FSLDDR: ddr_sdram_rcw_1 = 0x%08x\n",
+ ddr->ddr_sdram_rcw_1);
+ debug("FSLDDR: ddr_sdram_rcw_2 = 0x%08x\n",
+ ddr->ddr_sdram_rcw_2);
+ debug("FSLDDR: ddr_sdram_rcw_3 = 0x%08x\n",
+ ddr->ddr_sdram_rcw_3);
}
}
@@ -1159,8 +1164,14 @@ 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) {
+ /*
+ * For DDR3, set C/A latency if address parity is enabled.
+ * For DDR4, set C/A latency for UDIMM only. For RDIMM the delay is
+ * handled by register chip and RCW settings.
+ */
+ if ((ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) &&
+ ((CONFIG_FSL_SDRAM_TYPE != SDRAM_TYPE_DDR4) ||
+ !popts->registered_dimm_en)) {
if (mclk_ps >= 935) {
/* for DDR4-1600/1866/2133 */
esdmode5 |= DDR_MR5_CA_PARITY_LAT_4_CLK;
@@ -1193,7 +1204,9 @@ static void set_ddr_sdram_mode_9(fsl_ddr_cfg_regs_t *ddr,
esdmode5 = 0x00000400;
}
- if (ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) {
+ if ((ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) &&
+ ((CONFIG_FSL_SDRAM_TYPE != SDRAM_TYPE_DDR4) ||
+ !popts->registered_dimm_en)) {
if (mclk_ps >= 935) {
/* for DDR4-1600/1866/2133 */
esdmode5 |= DDR_MR5_CA_PARITY_LAT_4_CLK;
@@ -1965,6 +1978,7 @@ static void set_timing_cfg_6(fsl_ddr_cfg_regs_t *ddr)
static void set_timing_cfg_7(const unsigned int ctrl_num,
fsl_ddr_cfg_regs_t *ddr,
+ const memctl_options_t *popts,
const common_timing_params_t *common_dimm)
{
unsigned int txpr, tcksre, tcksrx;
@@ -1975,7 +1989,9 @@ static void set_timing_cfg_7(const unsigned int ctrl_num,
tcksre = max(5U, picos_to_mclk(ctrl_num, 10000));
tcksrx = max(5U, picos_to_mclk(ctrl_num, 10000));
- if (ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) {
+ if ((ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) &&
+ ((CONFIG_FSL_SDRAM_TYPE != SDRAM_TYPE_DDR4) ||
+ !popts->registered_dimm_en)) {
if (mclk_ps >= 935) {
/* parity latency 4 clocks in case of 1600/1866/2133 */
par_lat = 4;
@@ -2130,6 +2146,8 @@ static void set_ddr_sdram_cfg_3(fsl_ddr_cfg_regs_t *ddr,
rd_pre = popts->quad_rank_present ? 1 : 0;
ddr->ddr_sdram_cfg_3 = (rd_pre & 0x1) << 16;
+ /* Disable MRS on parity error for RDIMMs */
+ ddr->ddr_sdram_cfg_3 |= popts->registered_dimm_en ? 1 : 0;
debug("FSLDDR: ddr_sdram_cfg_3 = 0x%08x\n", ddr->ddr_sdram_cfg_3);
}
@@ -2535,7 +2553,7 @@ compute_fsl_memctl_config_regs(const unsigned int ctrl_num,
#ifdef CONFIG_SYS_FSL_DDR4
set_ddr_sdram_cfg_3(ddr, popts);
set_timing_cfg_6(ddr);
- set_timing_cfg_7(ctrl_num, ddr, common_dimm);
+ set_timing_cfg_7(ctrl_num, ddr, popts, common_dimm);
set_timing_cfg_8(ctrl_num, ddr, popts, common_dimm, cas_latency);
set_timing_cfg_9(ddr);
set_ddr_dq_mapping(ddr, dimm_params);
diff --git a/drivers/ddr/fsl/ddr4_dimm_params.c b/drivers/ddr/fsl/ddr4_dimm_params.c
index 42834ca..6e26ba8 100644
--- a/drivers/ddr/fsl/ddr4_dimm_params.c
+++ b/drivers/ddr/fsl/ddr4_dimm_params.c
@@ -179,6 +179,8 @@ unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num,
case DDR4_SPD_MODULETYPE_RDIMM:
/* Registered/buffered DIMMs */
pdimm->registered_dimm = 1;
+ if (spd->mod_section.registered.reg_map & 0x1)
+ pdimm->mirrored_dimm = 1;
break;
case DDR4_SPD_MODULETYPE_UDIMM:
diff --git a/drivers/ddr/fsl/interactive.c b/drivers/ddr/fsl/interactive.c
index c99bd2f..660060d 100644
--- a/drivers/ddr/fsl/interactive.c
+++ b/drivers/ddr/fsl/interactive.c
@@ -558,6 +558,7 @@ static void fsl_ddr_options_edit(fsl_ddr_info_t *pinfo,
*/
CTRL_OPTIONS(twot_en),
CTRL_OPTIONS(threet_en),
+ CTRL_OPTIONS(mirrored_dimm),
CTRL_OPTIONS(ap_en),
CTRL_OPTIONS(x4_en),
CTRL_OPTIONS(bstopre),
@@ -568,6 +569,7 @@ static void fsl_ddr_options_edit(fsl_ddr_info_t *pinfo,
CTRL_OPTIONS(rcw_override),
CTRL_OPTIONS(rcw_1),
CTRL_OPTIONS(rcw_2),
+ CTRL_OPTIONS(rcw_3),
CTRL_OPTIONS(ddr_cdr1),
CTRL_OPTIONS(ddr_cdr2),
CTRL_OPTIONS(tfaw_window_four_activates_ps),
@@ -660,6 +662,7 @@ static void print_fsl_memctl_config_regs(const fsl_ddr_cfg_regs_t *ddr)
CFG_REGS(ddr_sr_cntr),
CFG_REGS(ddr_sdram_rcw_1),
CFG_REGS(ddr_sdram_rcw_2),
+ CFG_REGS(ddr_sdram_rcw_3),
CFG_REGS(ddr_cdr1),
CFG_REGS(ddr_cdr2),
CFG_REGS(dq_map_0),
@@ -750,6 +753,7 @@ static void fsl_ddr_regs_edit(fsl_ddr_info_t *pinfo,
CFG_REGS(ddr_sr_cntr),
CFG_REGS(ddr_sdram_rcw_1),
CFG_REGS(ddr_sdram_rcw_2),
+ CFG_REGS(ddr_sdram_rcw_3),
CFG_REGS(ddr_cdr1),
CFG_REGS(ddr_cdr2),
CFG_REGS(dq_map_0),
@@ -857,8 +861,9 @@ static void print_memctl_options(const memctl_options_t *popts)
CTRL_OPTIONS(wrlvl_start),
CTRL_OPTIONS_HEX(cswl_override),
CTRL_OPTIONS(rcw_override),
- CTRL_OPTIONS(rcw_1),
- CTRL_OPTIONS(rcw_2),
+ CTRL_OPTIONS_HEX(rcw_1),
+ CTRL_OPTIONS_HEX(rcw_2),
+ CTRL_OPTIONS_HEX(rcw_3),
CTRL_OPTIONS_HEX(ddr_cdr1),
CTRL_OPTIONS_HEX(ddr_cdr2),
CTRL_OPTIONS(tfaw_window_four_activates_ps),
diff --git a/include/fsl_ddr_sdram.h b/include/fsl_ddr_sdram.h
index 6a1f04b..de7ef9b 100644
--- a/include/fsl_ddr_sdram.h
+++ b/include/fsl_ddr_sdram.h
@@ -408,6 +408,7 @@ typedef struct memctl_options_s {
unsigned int rcw_override;
unsigned int rcw_1;
unsigned int rcw_2;
+ unsigned int rcw_3;
/* control register 1 */
unsigned int ddr_cdr1;
unsigned int ddr_cdr2;
--
2.7.4
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