From c0c32af0b2f037e3e167c7ac82e7110ebae48fb5 Mon Sep 17 00:00:00 2001 From: York Sun Date: Mon, 29 Jan 2018 09:44:35 -0800 Subject: drivers/ddr/fsl: Add 3DS RDIMM support On top of RDIMM support, add new register calculation to support 3DS RDIMMs. Only symmetrical 3DS is supported at this time. Signed-off-by: York Sun --- drivers/ddr/fsl/ddr4_dimm_params.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) (limited to 'drivers/ddr/fsl/ddr4_dimm_params.c') diff --git a/drivers/ddr/fsl/ddr4_dimm_params.c b/drivers/ddr/fsl/ddr4_dimm_params.c index 6e26ba88a5..1f1d9b897a 100644 --- a/drivers/ddr/fsl/ddr4_dimm_params.c +++ b/drivers/ddr/fsl/ddr4_dimm_params.c @@ -1,5 +1,8 @@ /* - * Copyright 2014 Freescale Semiconductor, Inc. + * Copyright 2014-2016 Freescale Semiconductor, Inc. + * Copyright 2017-2018 NXP Semiconductor + * + * SPDX-License-Identifier: GPL-2.0+ * * calculate the organization and timing parameter * from ddr3 spd, please refer to the spec @@ -98,6 +101,10 @@ compute_ranksize(const struct ddr4_spd_eeprom_s *spd) if ((spd->organization & 0x7) < 4) nbit_sdram_width = (spd->organization & 0x7) + 2; package_3ds = (spd->package_type & 0x3) == 0x2; + if ((spd->package_type & 0x80) && !package_3ds) { /* other than 3DS */ + printf("Warning: not supported SDRAM package type\n"); + return 0; + } if (package_3ds) die_count = (spd->package_type >> 4) & 0x7; @@ -105,7 +112,7 @@ compute_ranksize(const struct ddr4_spd_eeprom_s *spd) nbit_primary_bus_width - nbit_sdram_width + die_count); - debug("DDR: DDR III rank density = 0x%16llx\n", bsize); + debug("DDR: DDR rank density = 0x%16llx\n", bsize); return bsize; } @@ -163,6 +170,7 @@ unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num, pdimm->n_ranks = ((spd->organization >> 3) & 0x7) + 1; pdimm->rank_density = compute_ranksize(spd); pdimm->capacity = pdimm->n_ranks * pdimm->rank_density; + pdimm->die_density = spd->density_banks & 0xf; pdimm->primary_sdram_width = 1 << (3 + (spd->bus_width & 0x7)); if ((spd->bus_width >> 3) & 0x3) pdimm->ec_sdram_width = 8; @@ -171,6 +179,8 @@ unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num, pdimm->data_width = pdimm->primary_sdram_width + pdimm->ec_sdram_width; pdimm->device_width = 1 << ((spd->organization & 0x7) + 2); + pdimm->package_3ds = (spd->package_type & 0x3) == 0x2 ? + (spd->package_type >> 4) & 0x7 : 0; /* These are the types defined by the JEDEC SPD spec */ pdimm->mirrored_dimm = 0; @@ -310,6 +320,17 @@ unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num, /* min CAS to CAS Delay Time (tCCD_Lmin), same bank group */ pdimm->tccdl_ps = spd_to_ps(spd->tccdl_min, spd->fine_tccdl_min); + if (pdimm->package_3ds) { + if (pdimm->die_density <= 0x4) { + pdimm->trfc_slr_ps = 260000; + } else if (pdimm->die_density <= 0x5) { + pdimm->trfc_slr_ps = 350000; + } else { + printf("WARN: Unsupported logical rank density 0x%x\n", + pdimm->die_density); + } + } + /* * Average periodic refresh interval * tREFI = 7.8 us at normal temperature range -- cgit v1.2.3