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-rw-r--r--board/freescale/t102xrdb/ddr.c154
1 files changed, 154 insertions, 0 deletions
diff --git a/board/freescale/t102xrdb/ddr.c b/board/freescale/t102xrdb/ddr.c
new file mode 100644
index 0000000..a20330b
--- /dev/null
+++ b/board/freescale/t102xrdb/ddr.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <hwconfig.h>
+#include <asm/mmu.h>
+#include <fsl_ddr_sdram.h>
+#include <fsl_ddr_dimm_params.h>
+#include <asm/fsl_law.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct board_specific_parameters {
+ u32 n_ranks;
+ u32 datarate_mhz_high;
+ u32 rank_gb;
+ u32 clk_adjust;
+ u32 wrlvl_start;
+ u32 wrlvl_ctl_2;
+ u32 wrlvl_ctl_3;
+};
+
+/*
+ * datarate_mhz_high values need to be in ascending order
+ */
+static const struct board_specific_parameters udimm0[] = {
+ /*
+ * memory controller 0
+ * num| hi| rank| clk| wrlvl | wrlvl | wrlvl |
+ * ranks| mhz| GB |adjst| start | ctl2 | ctl3 |
+ */
+ {2, 833, 0, 4, 6, 0x06060607, 0x08080807,},
+ {2, 1350, 0, 4, 7, 0x0708080A, 0x0A0B0C09,},
+ {2, 1666, 0, 4, 7, 0x0808090B, 0x0C0D0E0A,},
+ {1, 833, 0, 4, 6, 0x06060607, 0x08080807,},
+ {1, 1350, 0, 4, 7, 0x0708080A, 0x0A0B0C09,},
+ {1, 1666, 0, 4, 7, 0x0808090B, 0x0C0D0E0A,},
+ {}
+};
+
+static const struct board_specific_parameters *udimms[] = {
+ udimm0,
+};
+
+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;
+ struct cpu_type *cpu = gd->arch.cpu;
+
+ if (ctrl_num > 1) {
+ printf("Not supported controller number %d\n", ctrl_num);
+ return;
+ }
+ if (!pdimm->n_ranks)
+ return;
+
+ pbsp = udimms[0];
+
+ /* Get clk_adjust 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 &&
+ (pdimm->rank_density >> 30) >= pbsp->rank_gb) {
+ 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;
+ goto found;
+ }
+ pbsp_highest = pbsp;
+ }
+ pbsp++;
+ }
+
+ if (pbsp_highest) {
+ printf("Error: board specific timing not found\n");
+ printf("for data rate %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);
+ debug("\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, ",
+ pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2);
+ debug("wrlvl_ctrl_3 0x%x\n", pbsp->wrlvl_ctl_3);
+
+ /*
+ * Factors to consider for half-strength driver enable:
+ * - number of DIMMs installed
+ */
+ popts->half_strength_driver_enable = 0;
+ /*
+ * 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;
+
+ /* DHC_EN =1, ODT = 75 Ohm */
+ popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_OFF);
+ popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_OFF);
+
+ /* T1023 supports max DDR bus 32bit width, T1024 supports DDR 64bit,
+ * force DDR bus width to 32bit for T1023
+ */
+ if (cpu->soc_ver == SVR_T1023)
+ popts->data_bus_width = DDR_DATA_BUS_WIDTH_32;
+
+#ifdef CONFIG_FORCE_DDR_DATA_BUS_WIDTH_32
+ /* for DDR bus 32bit test on T1024 */
+ popts->data_bus_width = DDR_DATA_BUS_WIDTH_32;
+#endif
+}
+
+phys_size_t initdram(int board_type)
+{
+ phys_size_t dram_size;
+
+#if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_RAMBOOT_PBL)
+ puts("Initializing....using SPD\n");
+
+ dram_size = fsl_ddr_sdram();
+ dram_size = setup_ddr_tlbs(dram_size / 0x100000);
+ dram_size *= 0x100000;
+#else
+ /* DDR has been initialised by first stage boot loader */
+ dram_size = fsl_ddr_sdram_size();
+#endif
+ return dram_size;
+}