drivers/ddr/fsl: Add calculation of register control words
DDR4 RDIMM has some information in SPD to be used to calculate the control words for register chip. The rest can be found from JEDEC spec DDR4RCD02. Signed-off-by: York Sun <york.sun@nxp.com>
This commit is contained in:
York Sun
parent
c0c32af0b2
commit
564e9383e5
@ -724,10 +724,14 @@ static void set_timing_cfg_2(const unsigned int ctrl_num,
|
||||
}
|
||||
|
||||
/* DDR SDRAM Register Control Word */
|
||||
static void set_ddr_sdram_rcw(fsl_ddr_cfg_regs_t *ddr,
|
||||
const memctl_options_t *popts,
|
||||
const common_timing_params_t *common_dimm)
|
||||
static void set_ddr_sdram_rcw(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 ddr_freq = get_ddr_freq(ctrl_num) / 1000000;
|
||||
unsigned int rc0a, rc0f;
|
||||
|
||||
if (common_dimm->all_dimms_registered &&
|
||||
!common_dimm->all_dimms_unbuffered) {
|
||||
if (popts->rcw_override) {
|
||||
@ -735,6 +739,16 @@ static void set_ddr_sdram_rcw(fsl_ddr_cfg_regs_t *ddr,
|
||||
ddr->ddr_sdram_rcw_2 = popts->rcw_2;
|
||||
ddr->ddr_sdram_rcw_3 = popts->rcw_3;
|
||||
} else {
|
||||
rc0a = ddr_freq > 3200 ? 0x7 :
|
||||
(ddr_freq > 2933 ? 0x6 :
|
||||
(ddr_freq > 2666 ? 0x5 :
|
||||
(ddr_freq > 2400 ? 0x4 :
|
||||
(ddr_freq > 2133 ? 0x3 :
|
||||
(ddr_freq > 1866 ? 0x2 :
|
||||
(ddr_freq > 1600 ? 1 : 0))))));
|
||||
rc0f = ddr_freq > 3200 ? 0x3 :
|
||||
(ddr_freq > 2400 ? 0x2 :
|
||||
(ddr_freq > 2133 ? 0x1 : 0));
|
||||
ddr->ddr_sdram_rcw_1 =
|
||||
common_dimm->rcw[0] << 28 | \
|
||||
common_dimm->rcw[1] << 24 | \
|
||||
@ -747,12 +761,14 @@ static void set_ddr_sdram_rcw(fsl_ddr_cfg_regs_t *ddr,
|
||||
ddr->ddr_sdram_rcw_2 =
|
||||
common_dimm->rcw[8] << 28 | \
|
||||
common_dimm->rcw[9] << 24 | \
|
||||
common_dimm->rcw[10] << 20 | \
|
||||
rc0a << 20 | \
|
||||
common_dimm->rcw[11] << 16 | \
|
||||
common_dimm->rcw[12] << 12 | \
|
||||
common_dimm->rcw[13] << 8 | \
|
||||
common_dimm->rcw[14] << 4 | \
|
||||
common_dimm->rcw[15];
|
||||
rc0f;
|
||||
ddr->ddr_sdram_rcw_3 =
|
||||
((ddr_freq - 1260 + 19) / 20) << 8;
|
||||
}
|
||||
debug("FSLDDR: ddr_sdram_rcw_1 = 0x%08x\n",
|
||||
ddr->ddr_sdram_rcw_1);
|
||||
@ -2561,6 +2577,8 @@ compute_fsl_memctl_config_regs(const unsigned int ctrl_num,
|
||||
set_ddr_sdram_mode_9(ddr, popts, common_dimm, unq_mrs_en);
|
||||
set_ddr_sdram_mode_10(ctrl_num, ddr, popts, common_dimm, unq_mrs_en);
|
||||
#endif
|
||||
set_ddr_sdram_rcw(ctrl_num, ddr, popts, common_dimm);
|
||||
|
||||
set_ddr_sdram_interval(ctrl_num, ddr, popts, common_dimm);
|
||||
set_ddr_data_init(ddr);
|
||||
set_ddr_sdram_clk_cntl(ddr, popts);
|
||||
@ -2582,8 +2600,6 @@ compute_fsl_memctl_config_regs(const unsigned int ctrl_num,
|
||||
|
||||
set_ddr_sr_cntr(ddr, sr_it);
|
||||
|
||||
set_ddr_sdram_rcw(ddr, popts, common_dimm);
|
||||
|
||||
#ifdef CONFIG_SYS_FSL_DDR_EMU
|
||||
/* disble DDR training for emulator */
|
||||
ddr->debug[2] = 0x00000400;
|
||||
|
||||
@ -139,6 +139,7 @@ unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num,
|
||||
};
|
||||
int spd_error = 0;
|
||||
u8 *ptr;
|
||||
u8 val;
|
||||
|
||||
if (spd->mem_type) {
|
||||
if (spd->mem_type != SPD_MEMTYPE_DDR4) {
|
||||
@ -191,6 +192,26 @@ unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num,
|
||||
pdimm->registered_dimm = 1;
|
||||
if (spd->mod_section.registered.reg_map & 0x1)
|
||||
pdimm->mirrored_dimm = 1;
|
||||
val = spd->mod_section.registered.ca_stren;
|
||||
pdimm->rcw[3] = val >> 4;
|
||||
pdimm->rcw[4] = ((val & 0x3) << 2) | ((val & 0xc) >> 2);
|
||||
val = spd->mod_section.registered.clk_stren;
|
||||
pdimm->rcw[5] = ((val & 0x3) << 2) | ((val & 0xc) >> 2);
|
||||
/* Not all in SPD. For convience only. Boards may overwrite. */
|
||||
pdimm->rcw[6] = 0xf;
|
||||
/*
|
||||
* A17 only used for 16Gb and above devices.
|
||||
* C[2:0] only used for 3DS.
|
||||
*/
|
||||
pdimm->rcw[8] = pdimm->die_density >= 0x6 ? 0x0 : 0x8 |
|
||||
(pdimm->package_3ds > 0x3 ? 0x0 :
|
||||
(pdimm->package_3ds > 0x1 ? 0x1 :
|
||||
(pdimm->package_3ds > 0 ? 0x2 : 0x3)));
|
||||
if (pdimm->package_3ds || pdimm->n_ranks != 4)
|
||||
pdimm->rcw[13] = 0xc;
|
||||
else
|
||||
pdimm->rcw[13] = 0xd; /* Fix encoded by board */
|
||||
|
||||
break;
|
||||
|
||||
case DDR4_SPD_MODULETYPE_UDIMM:
|
||||
|
||||
@ -750,7 +750,9 @@ unsigned int populate_memctl_options(const common_timing_params_t *common_dimm,
|
||||
defined(CONFIG_SYS_FSL_DDR4)
|
||||
const struct dynamic_odt *pdodt = odt_unknown;
|
||||
#endif
|
||||
#if (CONFIG_FSL_SDRAM_TYPE != SDRAM_TYPE_DDR4)
|
||||
ulong ddr_freq;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Extract hwconfig from environment since we have not properly setup
|
||||
@ -1295,6 +1297,7 @@ done:
|
||||
|
||||
popts->package_3ds = pdimm->package_3ds;
|
||||
|
||||
#if (CONFIG_FSL_SDRAM_TYPE != SDRAM_TYPE_DDR4)
|
||||
ddr_freq = get_ddr_freq(ctrl_num) / 1000000;
|
||||
if (popts->registered_dimm_en) {
|
||||
popts->rcw_override = 1;
|
||||
@ -1308,6 +1311,7 @@ done:
|
||||
else
|
||||
popts->rcw_2 = 0x00300000;
|
||||
}
|
||||
#endif
|
||||
|
||||
fsl_ddr_board_options(popts, pdimm, ctrl_num);
|
||||
|
||||
|
||||
@ -382,9 +382,11 @@ struct ddr4_spd_eeprom_s {
|
||||
/* 135 Register Revision Number */
|
||||
uint8_t reg_rev;
|
||||
/* 136 Address mapping from register to DRAM */
|
||||
uint8_t reg_map;
|
||||
/* 137~253 Reserved */
|
||||
uint8_t res_137[254-137];
|
||||
u8 reg_map;
|
||||
u8 ca_stren;
|
||||
u8 clk_stren;
|
||||
/* 139~253 Reserved */
|
||||
u8 res_137[254 - 139];
|
||||
/* 254~255 CRC */
|
||||
uint8_t crc[2];
|
||||
} registered;
|
||||
|
||||
@ -106,7 +106,7 @@ typedef struct dimm_params_s {
|
||||
int tqhs_ps; /* byte 45, spd->tqhs */
|
||||
#endif
|
||||
|
||||
/* DDR3 RDIMM */
|
||||
/* DDR3 & DDR4 RDIMM */
|
||||
unsigned char rcw[16]; /* Register Control Word 0-15 */
|
||||
#ifdef CONFIG_SYS_FSL_DDR4
|
||||
unsigned int dq_mapping[18];
|
||||
|
||||
Loading…
Reference in New Issue
Block a user