drivers/ddr/fsl: Add 3DS RDIMM support

[oweals/u-boot.git] / 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 6e26ba88a5d47fb35661e2f03a3a24500e5e80b9..1f1d9b897a49eb66db703cade8bb92dbf6329a2a 100644 (file)
--- 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