summaryrefslogtreecommitdiffstats
path: root/board/freescale/ls1043aqds/ddr.c
diff options
context:
space:
mode:
Diffstat (limited to 'board/freescale/ls1043aqds/ddr.c')
-rw-r--r--board/freescale/ls1043aqds/ddr.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/board/freescale/ls1043aqds/ddr.c b/board/freescale/ls1043aqds/ddr.c
new file mode 100644
index 0000000000..705e3843f4
--- /dev/null
+++ b/board/freescale/ls1043aqds/ddr.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <fsl_ddr_sdram.h>
+#include <fsl_ddr_dimm_params.h>
+#ifdef CONFIG_FSL_DEEP_SLEEP
+#include <fsl_sleep.h>
+#endif
+#include "ddr.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void fsl_ddr_board_options(memctl_options_t *popts,
+ dimm_params_t *pdimm,
+ unsigned int ctrl_num)
+{
+ const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
+ ulong ddr_freq;
+
+ if (ctrl_num > 3) {
+ printf("Not supported controller number %d\n", ctrl_num);
+ return;
+ }
+ if (!pdimm->n_ranks)
+ return;
+
+ pbsp = udimms[0];
+
+ /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
+ * freqency and n_banks specified in board_specific_parameters table.
+ */
+ ddr_freq = get_ddr_freq(0) / 1000000;
+ while (pbsp->datarate_mhz_high) {
+ if (pbsp->n_ranks == pdimm->n_ranks) {
+ if (ddr_freq <= pbsp->datarate_mhz_high) {
+ popts->clk_adjust = pbsp->clk_adjust;
+ popts->wrlvl_start = pbsp->wrlvl_start;
+ popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
+ popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
+ popts->cpo_override = pbsp->cpo_override;
+ popts->write_data_delay =
+ pbsp->write_data_delay;
+ goto found;
+ }
+ pbsp_highest = pbsp;
+ }
+ pbsp++;
+ }
+
+ if (pbsp_highest) {
+ printf("Error: board specific timing not found for %lu MT/s\n",
+ ddr_freq);
+ printf("Trying to use the highest speed (%u) parameters\n",
+ pbsp_highest->datarate_mhz_high);
+ popts->clk_adjust = pbsp_highest->clk_adjust;
+ popts->wrlvl_start = pbsp_highest->wrlvl_start;
+ popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
+ popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
+ } else {
+ panic("DIMM is not supported by this board");
+ }
+found:
+ debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n",
+ pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
+
+ /* force DDR bus width to 32 bits */
+ popts->data_bus_width = 1;
+ popts->otf_burst_chop_en = 0;
+ popts->burst_length = DDR_BL8;
+ popts->bstopre = 0; /* enable auto precharge */
+
+ /*
+ * Factors to consider for half-strength driver enable:
+ * - number of DIMMs installed
+ */
+ popts->half_strength_driver_enable = 1;
+ /*
+ * Write leveling override
+ */
+ popts->wrlvl_override = 1;
+ popts->wrlvl_sample = 0xf;
+
+ /*
+ * Rtt and Rtt_WR override
+ */
+ popts->rtt_override = 0;
+
+ /* Enable ZQ calibration */
+ popts->zq_en = 1;
+
+#ifdef CONFIG_SYS_FSL_DDR4
+ popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
+ popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
+ DDR_CDR2_VREF_OVRD(70); /* Vref = 70% */
+#else
+ popts->cswl_override = DDR_CSWL_CS0;
+
+ /* DHC_EN =1, ODT = 75 Ohm */
+ popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
+ popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
+#endif
+}
+
+phys_size_t initdram(int board_type)
+{
+ phys_size_t dram_size;
+
+#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
+ return fsl_ddr_sdram_size();
+#else
+ puts("Initializing DDR....using SPD\n");
+
+ dram_size = fsl_ddr_sdram();
+#endif
+
+#ifdef CONFIG_FSL_DEEP_SLEEP
+ fsl_dp_ddr_restore();
+#endif
+
+ return dram_size;
+}
+
+void dram_init_banksize(void)
+{
+ gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+ gd->bd->bi_dram[0].size = gd->ram_size;
+}
OpenPOWER on IntegriCloud