armv8/ls2085ardb: Add support of LS2085ARDB platform

The LS2085ARDB is a evaluation platform that supports LS2085A
family SoCs. This patch add sbasic support for the platform.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

1 files changed, 192 insertions, 0 deletions

diff --git a/board/freescale/ls2085ardb/ddr.c b/board/freescale/ls2085ardb/ddr.c
new file mode 100644
index 0000000..6cd5e8b
--- /dev/null
+++ b/board/freescale/ls2085ardb/ddr.c
@@ -0,0 +1,192 @@
+/*
+ * 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>
+#include "ddr.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void fsl_ddr_board_options(memctl_options_t *popts,
+				dimm_params_t *pdimm,
+				unsigned int ctrl_num)
+{
+	u8 dq_mapping_0, dq_mapping_2, dq_mapping_3;
+	const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
+	ulong ddr_freq;
+	int slot;
+
+	if (ctrl_num > 2) {
+		printf("Not supported controller number %d\n", ctrl_num);
+		return;
+	}
+
+	for (slot = 0; slot < CONFIG_DIMM_SLOTS_PER_CTLR; slot++) {
+		if (pdimm[slot].n_ranks)
+			break;
+	}
+
+	if (slot >= CONFIG_DIMM_SLOTS_PER_CTLR)
+		return;
+
+	/*
+	 * we use identical timing for all slots. If needed, change the code
+	 * to  pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
+	 */
+	if (popts->registered_dimm_en)
+		pbsp = rdimms[ctrl_num];
+	else
+		pbsp = udimms[ctrl_num];
+
+
+	/* 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(ctrl_num) / 1000000;
+	while (pbsp->datarate_mhz_high) {
+		if (pbsp->n_ranks == pdimm[slot].n_ranks &&
+		    (pdimm[slot].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 for data rate %lu MT/s\n"
+			"Trying to use the highest speed (%u) parameters\n",
+			ddr_freq, 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"
+		"\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, wrlvl_ctrl_3 0x%x\n",
+		pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb,
+		pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2,
+		pbsp->wrlvl_ctl_3);
+
+	if (ctrl_num == CONFIG_DP_DDR_CTRL) {
+		/* 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 */
+		/*
+		 * Layout optimization results byte mapping
+		 * Byte 0 -> Byte ECC
+		 * Byte 1 -> Byte 3
+		 * Byte 2 -> Byte 2
+		 * Byte 3 -> Byte 1
+		 * Byte ECC -> Byte 0
+		 */
+		dq_mapping_0 = pdimm[slot].dq_mapping[0];
+		dq_mapping_2 = pdimm[slot].dq_mapping[2];
+		dq_mapping_3 = pdimm[slot].dq_mapping[3];
+		pdimm[slot].dq_mapping[0] = pdimm[slot].dq_mapping[8];
+		pdimm[slot].dq_mapping[1] = pdimm[slot].dq_mapping[9];
+		pdimm[slot].dq_mapping[2] = pdimm[slot].dq_mapping[6];
+		pdimm[slot].dq_mapping[3] = pdimm[slot].dq_mapping[7];
+		pdimm[slot].dq_mapping[6] = dq_mapping_2;
+		pdimm[slot].dq_mapping[7] = dq_mapping_3;
+		pdimm[slot].dq_mapping[8] = dq_mapping_0;
+		pdimm[slot].dq_mapping[9] = 0;
+		pdimm[slot].dq_mapping[10] = 0;
+		pdimm[slot].dq_mapping[11] = 0;
+		pdimm[slot].dq_mapping[12] = 0;
+		pdimm[slot].dq_mapping[13] = 0;
+		pdimm[slot].dq_mapping[14] = 0;
+		pdimm[slot].dq_mapping[15] = 0;
+		pdimm[slot].dq_mapping[16] = 0;
+		pdimm[slot].dq_mapping[17] = 0;
+	}
+	/* To work at higher than 1333MT/s */
+	popts->half_strength_driver_enable = 0;
+	/*
+	 * Write leveling override
+	 */
+	popts->wrlvl_override = 1;
+	popts->wrlvl_sample = 0x0;	/* 32 clocks */
+
+	/*
+	 * Rtt and Rtt_WR override
+	 */
+	popts->rtt_override = 0;
+
+	/* Enable ZQ calibration */
+	popts->zq_en = 1;
+
+	if (ddr_freq < 2350) {
+		popts->ddr_cdr1 = DDR_CDR1_DHC_EN |
+				  DDR_CDR1_ODT(DDR_CDR_ODT_60ohm);
+		popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) |
+				  DDR_CDR2_VREF_RANGE_2;
+	} else {
+		popts->ddr_cdr1 = DDR_CDR1_DHC_EN |
+				  DDR_CDR1_ODT(DDR_CDR_ODT_100ohm);
+		popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_100ohm) |
+				  DDR_CDR2_VREF_RANGE_2;
+	}
+}
+
+phys_size_t initdram(int board_type)
+{
+	phys_size_t dram_size;
+
+	puts("Initializing DDR....using SPD\n");
+
+	dram_size = fsl_ddr_sdram();
+
+	return dram_size;
+}
+
+void dram_init_banksize(void)
+{
+#ifdef CONFIG_SYS_DP_DDR_BASE_PHY
+	phys_size_t dp_ddr_size;
+#endif
+
+	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+	if (gd->ram_size > CONFIG_SYS_LS2_DDR_BLOCK1_SIZE) {
+		gd->bd->bi_dram[0].size = CONFIG_SYS_LS2_DDR_BLOCK1_SIZE;
+		gd->bd->bi_dram[1].start = CONFIG_SYS_DDR_BLOCK2_BASE;
+		gd->bd->bi_dram[1].size = gd->ram_size -
+					  CONFIG_SYS_LS2_DDR_BLOCK1_SIZE;
+	} else {
+		gd->bd->bi_dram[0].size = gd->ram_size;
+	}
+
+#ifdef CONFIG_SYS_DP_DDR_BASE_PHY
+	/* initialize DP-DDR here */
+	puts("DP-DDR:  ");
+	/*
+	 * DDR controller use 0 as the base address for binding.
+	 * It is mapped to CONFIG_SYS_DP_DDR_BASE for core to access.
+	 */
+	dp_ddr_size = fsl_other_ddr_sdram(CONFIG_SYS_DP_DDR_BASE_PHY,
+					  CONFIG_DP_DDR_CTRL,
+					  CONFIG_DP_DDR_NUM_CTRLS,
+					  CONFIG_DP_DDR_DIMM_SLOTS_PER_CTLR,
+					  NULL, NULL, NULL);
+	if (dp_ddr_size) {
+		gd->bd->bi_dram[2].start = CONFIG_SYS_DP_DDR_BASE;
+		gd->bd->bi_dram[2].size = dp_ddr_size;
+	} else {
+		puts("Not detected");
+	}
+#endif
+}